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     5                                                                                                                                                   6
                                                                                                                                                                                                                                                                                                                                                                            2 Grace Davison • 3 ICC Roof Coatings
                                                                                                                                                                                                                                                                                          Vol 30 • SEPTEMBER 2008
                                                                                                                                                                                                                                                                                                                                                       4 Cray Valley Resins • 5 Byk Chemie • 6 Movers & Shakers




                                                   Wax Additives
                                             Wax Additives for Improved Mechanical Properties
                                                                                                                                                       Servochem
W
                                                                                                                                                       Johannesburg
       ax additives have been used to enhance surface properties     The effect of a wax is mostly determined by two parameters: Melting
       of coatings. Wax additives can have an effect on a coatings   point and polarity. Waxes with a lower melting point tend to improve
scratch/mar resistance, slip, water repellency, anti-blocking and    slip, whereas waxes with a higher melting point tend to give good
rheology. In addition waxes can matt surfaces, enhance gloss, give   mechanical resistance. In these cases the polarity has little effect
soft touch feel and give structured surfaces.                        on the properties. Polarity does however play a major role in water
                                                                     repellency, hydrophobicity and anti-blocking. These properties can




                                                                                                                                                             Welcome
                                                                     only be achieved with waxes which are very non-polar.


                                                                                             BYK has introduced a revolutionary method
                                                                                             of wax processing that allows for the creation
                                                                                                                                              10 years of service
                                                                                                                                                                                            new staff
                                                                                                                                                                                                                                                                                                                                            Raw Material Prices
                                                                                                                                                                                                                                                                                                                                                    Raw Material Prices
                                                                                             of novel new additives. In this new process,
                                                                                             BYK can produce “Wax Alloys” that show
                                                                                             synergistic benefits of wax combinations.
                                                                                                                                               Morris Matjee - 10 August 1988                                                                                             T   his year has seen an unprecedented series of price increases
                                                                                                                                                                                                                                                                              of most of our major raw materials. This has been caused by
                                                                                                                                                                                                                                                                          a number of factors which can be summarised as:
                                                                                                                                                                                                                                                                                                                                                 • Other Raw Material Price Increases – We have seen the price
                                                                                                                                                                                                                                                                                                                                                   of other base raw materials, eg, iron and steel, sulphur, chlorine
                                                                                                                                                                                                                                                                                                                                                   increase significantly in 2008 which have driven up the prices of
                                                                                                                                                                                                                                                                                                                                                   a number of the pigments which we sell.
                                                                                             Polyamide and polyethylene waxes have                                                                                                                                        • Oil price – The average price of oil for 2006 was $66-00 per
                                                                                             commonly been used in coatings to improve
                                                                                             mechanical properties of coatings. They
                                                                                                                                                 big “0” birthdays                                                                                                          barrel and for 2007 we saw a slight increase to an average of
                                                                                                                                                                                                                                                                            $72-00 per barrel. 2008 has seen the price of oil rocket up to
                                                                                                                                                                                                                                                                                                                                                 These three factors have been the major contributors to the price
                                                                                                                                                                                                                                                                                                                                                 increases we have seen this year, but we have also had to deal
                                                                                             have been added as single components                        for 2008                                                                                                           all time highs of just under $150-00 per barrel (an increase of      with escalating petrol and diesel prices, as well as increased wage
                                                                                             and in combination to achieve the desired                                                                                                                                      over 100%), and while the price has softened to current levels       expectations brought on by our increasing inflation rate.
                                                                                                                                                   Judy Jacobs        – 40
                                                                                             effects. Until now, these waxes have always                                                                                                                                    of around $115-00 per barrel, the average price for 2008 is
                                                                                                                                                   Johannes Mooka – 30                       Yolandi van Vuren - Bookeeper              Cornelia Prinsloo – Orders Dept
                                                                                             been available as separate preparations,                                                                                                                                       currently projected to be in the order of $119-00 per barrel, an     Servochem, along with our major suppliers have tried to manage
                                                                                                                                                   Tristan Van Vuuren – 30
                                                                                             either micronized or pre-dispersed.                                                                                                                                            increase of 65% over 2007. Increases of this nature cannot be        these price increases as best as possible, and, in a number of
                                                                                                                                                                                                                                                                            absorbed by raw material manufacturers and the significant           instances, have absorbed increases without passing them on.
                                                                                             CERAFLOUR 988 and CERAFLOUR 928                                                                                                                                                increases in the downstream petro-chemical derivatives which         We assure all of our customers that should we are constantly

Figure 1: Showing properties of varies wax types
                                                                                             are the first of a new line of “Wax Alloys”                                                                                weddings                                            form the building blocks of most of the products which we sell       negotiating with our suppliers to ensure that we remain
                                                                                             available from BYK. These waxes display                                                                                                                                        have had to be passed on. In addition a number of manufacturers      as competitive as possible in our market. Should we
                                                                                             excellent mechanical properties, enhanced
                                                                                             matting effects and easy incorporation.
                                                                                                                                                             retirement                                                      Congratulations to Michael and Claire
                                                                                                                                                                                                                             who tied the knot on 9th of August
                                                                                                                                                                                                                                                                            have introduced “Energy Surcharges” which relate directly to the
                                                                                                                                                                                                                                                                            increased costs of running their plants.
                                                                                                                                                                                                                                                                                                                                                 see any improvement in this situation which
                                                                                                                                                                                                                                                                                                                                                 results in price reductions from our
                                                                                                                                                                                                                             2008. We wish them everything of
                                                                                                                                                    Congratulations to Pam                                                                                                                                                                       suppliers, we will be sure to pass
                                                                                                                                                                                                                             the best in the future.
                                                                                             CERAFLOUR 988 is an alloy of Polyamide                 Bowater who retires at end                                                                                            • Rand Weakness – In January 2008, the Rand was trading at             these on to you.
                                                                                             and Polyethylene. It is most suitable                  August 2008. We would                                                                                                   6-95 against the US Dollar and 10-21 against the Euro. Today we
                                                                                             for solvent-borne and UV systems.                      like to wish her all the best                                                                                                 have 7-83 against the Dollar and 11-50 against the Euro,
                                                                                             CERAFLOUR 928 has been specifically                    for the future.                                                                                                                         a depreciation of 13% in both instances. This
                                                                                             designed for water-borne systems,                                                                                                                                                                       devaluation of our currency cannot be
                                                                                             however it has shown good compatibility                                                                                                                                                                          absorbed and, unfortunately
                                                                                             in some solvent based systems. It is an                                                                                                                                                                                   has to be passed on.

         Polyethylene Wax
          (1000 Cycles)
                                      CERAFLOUR 988
                                       (4000 Cycles)

Figure 2 Showing improved scratch resistance
                                                                         Amide Wax
                                                                        (2000 Cycles)
                                                                                             alloy of different polyethylene waxes.

                                                                                             Both products can also be used in low
                                                                                                                                                                                                                                                                                                                                                      Common Is Questions
                                                                                                                                                                                                                                                                                                                                                          What Nanotechnology?
                                                                                                                                                                                                                                                                          W
                                                                                             dosages (0.5%) in gloss formulations to                                                                                                                                            hen we see raw material suppliers they often                          Nanobyk ™ ZNO and CEO dispersions from Byk
                                                                                             improve scratch resistance.                                                                                                                                                        introduce us to new products which are either made using
                                                                                                                                                                                                                                                                          Nanotechnology or use a property deriving from Nanotechnology-         b)   Improvement in scratch and car wash resistance by the

                                                                                          CERAFLOUR 988           CERAFLOUR 928                                                     15 years of service                                                                   but what is Nanotechnology? It is the science (some people
                                                                                                                                                                                                                                                                          would say black art) of either synthesizing products so that they
                                                                                                                                                                                                                                                                                                                                                      addition of Byk Nano Silica and Alumina Dispersions into
                                                                                                                                                                                                                                                                                                                                                      OEM and refinish coatings (Now similar technology is also
                                                                      Composition         Micronized PE /         Micronized modified                                    Peter Zuma recently celebrated 15                                                                give very small (1 nanometer = 1 billionth of a meter or 1 millionth        being applied to wooden floor finishes)
                                                                                          Amide - wax             PE / PE - wax                                          years of service with Servochem Natal.                                                           of a millimeter), very regular chemical structures, or dispersing
                                                                                                                                                                                                                                                                          and stabilizing “normal” materials down to this very small particle    c)   Nano Silver technology – to improve hospital coating for
                                                                      D50                 6 µm                    8 µm
                                                                                                                                                                         Peter is the major shareholder of                                                                structure . Often the aim of Nanotechnology is to mimic something           claimed long term resistance to microbiological attack from
                                                                      Melting Point       145°C                   115°C                                                                                                                                                   from nature - as even with all our science nature still seems to be
                                                                                                                                                                         Msholozi Transport a BBBEE company                                                                                                                                           the so called super bug MRSA
                                                                      Developed for       Solvent-borne based     Water-borne systems                                                                                                                                     better at Nanotechnology than we are.
                                                                                                                                                                         founded some years ago with Ian and




                                                                                                                                                                                                                      Servochem
                                                                                          systems                                                                                                                                                                                                                                                From what we hear and see these are just a few of the many
                                                                                                                                                                         Barry as his other shareholders.
                                                                      Also Suitable for   Solvent-free coatings Solvent-borne and                                                                                                                                         The point of using Nano sized particles in coatings is to either       potential coatings end uses for Nanotechnology
                                                                                                                solvent-free coatings                                    So, although Peter isn’t actually                                                                introduce, or improve, properties which cannot be achieved




                                                                                                                                                                                                                           Natal
                                                                                                                                                                         employed at Servochem anymore,                                                                   by using normal sized materials. Examples of such property             For more information on this interesting and rapidly developing
Figure 3: Showing                      Figure 4: Showing             All Technical Data Sheets and MSDS can be found at www.byk.                                         he runs Msholozi Transport from the                                                              improvements are:                                                      technology Please contact the author or your local Servochem/
Matting Efficiency                     improvement in                com under additive guide. For any further details please contact                                    Servochem offices, and remains part                                                                                                                                     Byk representative
                                       scratch resistance            the local BYK representative.                                                                       of the family.                                                                                   a)   Improvements in long term exterior durability and UV resistance
                                                                                                                                                                                                                                                                               in Wood finish, pigmented and clear coatings by introducing       Philip Green - Paint Technology Consultant
   2                                                                                                                                                          3                                                                                                               4




SHIELDEX®                                        Anti-corrosive Pigments
                                        1.0 Anti-corrosive Pigments                                                                                                                           marketforneed
                                                                                                                                                                                              Fulfilling a market need
                                                                                                                                                                                                    at Coatings Africa 2008
                                                                                                                                                                                                                                                                                                                                             education paint
                                                                                                                                                                                                                                                                                                                                   education aboutabout paint
General Information                                                      SHIELDEX® pigments are based on calcium ion exchanged
                                                                         amorphous silica gel and have been developed as a replacement
SHIELDEX® products are a range of highly effective, non-toxic,           for toxic anti-corrosive pigments like red lead, zinc chromate or
heavy metal free anti-corrosive ion exchange pigments.                   strontium chromate as well as an alternative for heavy metal           The hazards relating to the


 Typical Chemical and           SHIELDEX AC 5®
                                                        SHIELDEX AC 3®
                                                                         containing zinc phosphate based pigments.
                                                                                            ®
                                                                              SHIELDEX AC 303
                                                                                                                                                substances used in the chemical
                                                                                                                                                sector has resulted in an increase                                                                                    T  he Rohm and Haas Paint Quality
                                                                                                                                                                                                                                                                         Institute (PQI) plays an important role in
                                                                                                                                                                                                                                                                      creating a more informed paint consumer
                                                                                                                                                                                                                                                                                                                       The PQI urges consumers to use quality
                                                                                                                                                                                                                                                                                                                       paint because it provides extra years
                                                                                                                                                                                                                                                                                                                       of service, maintains an outstanding
                                                                                                                                                                                                                                                                                                                                                                        Quality paints also maintain colour better
                                                                                                                                                                                                                                                                                                                                                                        than oil and alkyd paints, especially in
                                                                                                                                                                                                                                                                                                                                                                        areas that receive direct sunlight. While
 Physical Properties                                                                                                                            in the care with which chemicals
                                                                                                                                                are handled. This is particularly                                                                                     and assists quality paint manufacturers in       appearance and even wards off some               all paints will eventually fade, the rate of
 Appearance                                          white, odourless powder                                                                    pertinent in the light recent                                                                                         their efforts to produce and promote quality     common problems that can render a paint          fading is much lower with better quality
 Average particle size (µm)             5                      3                       3                                                                                                                                                                              paints.                                          job unsightly in a relatively short time         paints.
                                                                                                                                                catastropies in our industry. Thus,
                                                                                                                                                                                                                                                                                                                       period. The investment in quality paint
 pH                                     9                      9                       9                                                        all stakeholders (manufacturers,
                                                                                                                                                                                                                                                                      “The PQI, which is a brand neutral               ensures long term cost savings, it means         The PQI has recently re-vamped its South
                                                                                                                                                users, transporters, society, etc)
 Density (g/cm )
               3
                                       1.8                     1.8                    1.8                                                                                                                                                                             organisation, encourages improvement of          less frequent painting and also guarantees       African website (www.paintquality.co.za)
                                                                                                                                                have to take extra precautions                                                                                        quality standards and strives to educate the     a long, lasting top quality finish.              to provide the local paint market with
 Oil Absorption (g/100g)                60                     60                      80                                                       when handling these substances.                                                                                       market on what constitutes a quality paint                                                        even more relevant information on the
 Calcium Content (%)                    6                      6                       3                                                        In deciding on the best way to                                                                                        to ensure consumers gets better value for        The South African DIY market has also            advantages of using high quality paint and
           ®
SHIELDEX anti-corrosive pigments are highly effective due to             power due to the basic character of the pigment surface and can        handle these chemcials, it is                                                                                         money,” says Nita Jacob, spokesperson for        shifted dramatically from the old concept        the importance of its correct application.
their low density and high surface area. They possess neutralizing       be used in a wide variety of resin systems.                            crucial that the stakeholder is                                                                                       the PQI in South Africa. “It is heartening       that the whole idea about DIY was to
                                                                                                                                                aware of the nature of chemical                                                                                       to now see the competitive focus on              save money. Against a backdrop of TV             This easy-to-navigate website offers a
                           SHIELDEX®AC 5               SHIELDEX®AC 3                SHIELDEX®AC 303                                             being handled.                                                                                                        performance improvements and the                 make-over programmes and step-by-step            wealth of practical advice to both the novice
                                                                                                                                                                                                                                                                      introduction of new, innovative products.        magazine guides, perceptions of DIY in           and the DIY enthusiast. The educational
                           Standard Grade:             Thin film systems: Wash      Special grade for                                           A Material Safety Data Sheet                                                                                          Old products are being improved and new          general, have shifted from one seen as a         site provides up-to-date information on
 Reccomended               Solvent-borne primers       primers                      reactive primers:                                           (MSDS), satisfies this need. This                                                                                     technologies are opening doors to fresh          money saving chore, to a hugely popular          what constitutes a quality paint, new paint
 Application areas         Water-borne primers         2-pack systems               coil coatings                                               document, inter alia, outlines the                                                                                    concepts in the paint industry.                  leisure activity.                                technology, as well as the latest techniques
                           Film thickness ≥ 20µm       Film thickness ≤ 10µm        powder coatings                                             hazardous subtances contained                                                                                                                                                                                           and trends. There is also a section on the
                           Water-borne systems:        Wash primers:                Coil coatings                                               in the chemicals being handled,                                                                                       “The PQI is determined to lift the image         Involving the consumer in the selection of       benefits of using acrylic paints. The PQI
                           1-4 wt.-%on formulation     3-5 wt.-% on formulation     6-9 wt.-%on formulation                                                                                                                                                           of the coatings industry by educating the        the paint type is well worth it, especially as   also includes helpful tips on choosing
                                                                                                                                                as well as recommends corrective
                                                                                                                                                                                                                                                                      consumer on paints and to inform the             there are many more new high performance         colour and decorative paint effects.
 Additional Level                                                                                                                               actions when users are accidently
                                                                                                                                                                                                                                                                      market on the benefits of using quality paints   paints coming onto the market.
                           Solvent-borne systems:      2-pack systems:              Powder Coatings:                                            exposed to them.                                                                                                      and their correct application. Improved                                                           The Paint Quality Institute, which originated
                           3-7 wt.-%on formulation     5-7 wt.-%on formulation      10 wt.-%on formulation
                                                                                                                                                                                                                                                                      safety standards, as well as responsible         The focus on quality is closely linked with a    in the USA in 1989 and now operates
                                                                                                                                                A mini CD, containing the MSDS’s                                                                                      care for health and the environment are          growing interest in new, high performance        successfully in over 14 countries, has
General Formulation Advice                                               Depending on the type of binder, SHIELDEX® may improve the             of all the products supplied by                                                                                       also encouraged.                                 paints. As consumers tackle more different       also transformed the look and feel of its
                                                                         corrosion resistance and the toughness of the dry film, but it may     CRAY VALLEY South Africa                                                                                                                                               surfaces – like melamine and ceramic             global logo to reflect its expanded colour
Introduction                                                             also reduce its flexibility. This can be overcome by adjusting the     (CVSA) was launched at the                                                                                            “Looking forward, the PQI sees the local         tiles – they understand the need for more        and design competence, as well as its
SHIELDEX® pigments are highly effective, active anti-corrosive           PVC, changing the filler combination or changing the cross-link        Coatings for Africa Trade Show        Picture 1: CV staff receiving delegates at the CV stand at the show             market continuing the already perceptible        specialist paint products.                       multi-national presence.
pigments with outstanding properties compared to conventional            density of the resin.                                                  that was co-hosted by SAPMA                                                                                           shift towards a greater emphasis on paint
pigments.                                                                                                                                       and OCCA, from the 19th to the        Picture 2: CV Team at the show. L-R: Daniel Souchon, Udesh Surajballi, Denzil   performance.                                     Consumers also appreciate that with acrylic      For help, advice and
                                                                         Basicity of SHIELDEX®                                                  21st August 2008. The interactive,               Mohanlal, Amal Ramessur, londiwe Mgwaba, Prega Moodley, Shaun                                                         paints they have to do less touch up jobs        inspiration go to
SHIELDEX® pigments are basic calcium ion exchanged silica                Along with the neutralising power the basic character of               user friendly CD, also containing                Rassool, Jag Kalyan And Suhren Raghunanan.                           In a sense, the market is moving on from         because high quality pure acrylic paint          www.paintquality.co.za
based particles with a slight porosity and relatively high surface       SHIELDEX® may lead to viscosity (as it possible for other basic        Technical Data Sheets (TDS)                                                                                           just being about colour. We see a definite       chips less easily than cheaper alternatives.
area. SHIELDEX® pigments differ greatly from other commonly              pigments) if resins with acid functional groups are used. When         and Technical reports, was well                                                                                       trend towards satisfying a demand for            High quality acrylic paints tend to adhere
                                                                                                                                                                                      Picture 3: L-R, Amal, londiwe, Jag and Daniel at the Gala prize Giving
                                                                         amino cross-linkers are used, the level of curing might be affected.                                                                                                                         higher performance from paint.”                  well to a variety of substrates, which gives
used anti-corrosive pigments regarding their physical and chemical                                                                              received by the market.                          Dinner. Londiwe did CRAY VALLEY proud by receiving an
                                                                         Acid catalysts may loose some activity due to absorption onto                                                                                                                                                                                 them greater resistance to paint failures.
behaviour.                                                                                                                                                                                       award for outstanding achievement in the SAPMA Module One
                                                                         the SHIELDEX® surface during storage. This phenomena can                                                                                                                                                                                      They also have better blister resistance,
                                                                                                                                                Contact your Servochem                           course.
                                                                         be controlled easily by suitable adjustment of the formulation.                                                                                                                                                                               which means that flaking
High Effectiveness                                                                                                                              representative for your copy of the                                                                                                                                    problems are less likely.
Typical addition are about 1/3 to ½ (based on weight) compared           Reduction of the acidity can be achieved by neutralising with          new Product Brochure and CD.          Picture 4: CVSA Product Brochure, File, CD and Bag handed out at
to conventional anti-corrosive pigments. Due to the density of           amine compounds: other means of control include the use of non-                                                         the show.
SHIELDEX® compared to conventional anti-corrosive pigments,              ionic blocked catalyst or by the use of surface-active dispersing
replacement with SHIELDEX® should be done on a volume basis.             agents.
Often, lower addition levels based on volume are sufficient for
SHIELDEX® pigments as they possess a higher effectiveness due            Fillers
to the low density than other anti-corrosive pigments.                   Regarding fillers or pigments, there are no limitations when
                                                                         formulating with SHIELDEX®. The combination with plate-like fillers
Pigment Volume Concentration                                             like talk or acicular fillers like wollastonite can be advantageous.
Depending on the addition level of SHIELDEX®, the ratio of PVC
to CPVC might be altered due to the relative high oil absorption         Combination with other active pigments
level (ca. 60g/100g or 116ml/100ml) thus influencing the dry film        Combinations with other active anti-corrosive pigments are
properties. This is most obvious for high PVC values.                    generally possible and may be advantageous in specific cases.
                                                                         For example, a combination of SHIELDEX® with zinc oxide leads
                                                                         to a significant improvement in alkyd resins.

				
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