Serv News 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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