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Product Bulletin
AUSTHANE AU270 LD Rigid Pour Foam System
Issue Date: August 2003
Replaces: July 2001
AUSTRALIAN URETHANE SYSTEMS PTY LTD Page 1 of 4
AUSTHANE AU270 NON-CFC RIGID LOW DENSITY
POLYURETHANE POUR FOAM SYSTEM
DESCRIPTION PRODUCT USE & TECHNICAL DATA
AUSTHANE AU270 is a flame retarded two pack Mix Ratio
rigid polyurethane foam system, producing foam
3
with a nominal free-rise density of 35-37 kg/m . One (1) Part of Polyol AU270 to One (1) Part Iso
AU270 by weight or volume.
Polyol AU270 is a NON-CFC Polyol, using
141B - HCFC 'Blowing Agent'.
The ODP factor (Ozone Depletion Potential) Laboratory Reactivity Profile
for 141B is 0.1.
The figures set out are the Laboratory Quality
APPLICATIONS Control Specification for the system at 20ºC.
Based on 200gms of total mix, mixed with a
AUSTHANE AU270 is recommended 50mm Disc Stirrer at 2800 RPM.
- for use as thermal insulation in cold and hot Mix Time 20 seconds
applications, for contact surface Cream Time 36 + 4 seconds
temperatures ranging from - 50ºC to + 85ºC. Gel Time 170 + 10 seconds
Tack Free Time 200 + 20 seconds
- for use in `buoyancy' applications i.e. cavity/ 3
compartment/ void filling for boats, wave-skis, Free-Rise Density 36 + 1 kg/m
canoes etc., in building panels, and moulded
fibreglass systems. For "hand-mix" applications, a temperature of
25ºC is recommended for both the Polyol & Iso
- for moulding/void filling applications where liquid components.
low weight and increased stiffness / stability
are required. Specific Gravity of Components
- for pour-in-place or injection use by either Polyol AU270 1.14 g/ml ( @ 25ºC)
‘hand’ mixing or machine processing. Iso AU270 1.23 g/ml ( @ 25ºC)
FIRE HAZARD Physical Properties of Cured Foam (under
laboratory test conditions)
It should be noted that the AU270 Polyol 3
Free-Rise Density 35-37 kg/m
component contains flame retardant chemical
additives at a low level. It is not fire-rated and Closed Cell Content > 88%
foam produced from this system will burn
while in contact with a flame or under high Thermal Conductivity - Initial Value
temperature conditions. k factor W/m.K (typical result) 0.020 – 0.022
The Building Code of Australia sets out the Compressive Stress at 10% deformation
requirements/use conditions and guidelines for - typical results
the use of these systems in commercial and
industrial building applications. Foam Test Parallel to Perpendicular to
Density Rise Rise
37 kg / m³ > 240 kPa > 100 kPa
50 kg / m³ > 285 kPa > 245 kPa
AUSTRALIAN URETHANE SYSTEMS PTY LTD A.C.N. 000 168 874 A.B.N. 50 000 168 874
Sydney 9 Prince William Drive, SEVEN HILLS NSW 2147 Phone (02) 9838 0222 Facsimile (02) 9838 0233
Brisbane Suite 73 / 283 Given Terrace, PADDINGTON QLD 4064 Phone (07) 3876 5300 Facsimile (07) 3876 5311
Melbourne PO Box 211 PORT MELBOURNE VIC 3207 Phone (03) 9646 2267 Facsimile (03) 9646 2553
Product Bulletin
AUSTHANE AU270 LD Rigid Pour Foam System
Issue Date: August 2003
Replaces: July 2001
Page 2 of 4
Dimensional Stability of AU270 System at USE/PROCESSING INSTRUCTIONS
3
35 – 37 kg/m (based on AS2489.6)
The AU270 System is designed to produce a
3 3
% Change in dimension "free-rise" foam of 36 kg/m (2.2lb/ft ) nominal
density when the components are mixed in the
Dimension 7 Days exposure 7 Days correct ratio (1:1) by weight and using the
exposure prescribed temperature (25ºC) and processing
at -15ºC at 95ºC conditions.
Length Nil + 2.90%
Warming all mould/contact surfaces to 30-40ºC
Width -1.50% + 0.40% will give the best results.
Thickness Nil - 1.70% In practice the density will be influenced by
the configuration of the cavity in which the
foaming process takes place.
Notes on Thermal Conductivity
Restrictions to flow will result in increased
In applications where impermeable facings are density.
in place or applied to both faces eg. metal
sheeting, metal foils, fibreglass lay-up Variations from recommended temperatures
construction, and is adhered firmly over the for components and moulds will also effect
whole surface of both sides of the foam, the moulded density.
foam will retain its Initial k factor of typically
Warming of both components Polyol and
0.020 / 0.022 W/(m.K) [0.018/0.020 kcal/(mhºC)]
Isocyanate to 25ºC will significantly improve the
efficiency and flow of the system
The R value - Thermal Resistance on this
basis is set out below
HAND MIX PROCEDURE
AU270 PU FOAM R Value*
2 Calculate the volume to be filled. From this
Thickness mm m K/W
foam volume requirement, calculate the nominal
required quantity of system based on a finished
100 4.76
foam density of 40 kg/m³.
50 2.38
25 1.19 The quantity of system will generally be greater
than the calculated quantity to allow for residues
* Note - at k = 0.021 W/m.K. in weighing and mixing containers, the amount of
overpacking required to fill the void/mould
Technical reports indicate that at normal shape, and the quantity of material mixed for
exposure temperature conditions "variations in each pour/mix.
thermal conductivity cannot be detected
experimentally between (foam densities of) 30 Procedure
3
and 60 kg/m . The variations due to differences
in density are less than those caused by All materials and equipment should be prepared
variations in the composition of the cell gas". and set up in advance to ensure rapid and
efficient sequence from the time the operation is
Comparison of Units for started.
Thermal Conductivity - k
(1) Accurately weigh the required quantity per
W/(m.K) 0.017 0.023 0.029 pour/mix of Polyol AU270 into a dry & clean
kcal/(mhºC) 0.015 0.020 0.025 container.
2
(2) Add the required quantity of ISO AU270
1 W/m.K = 6.933 Btu.in/ft hºF (same weight as polyol) to the same container.
2
1 Btu.in/ft hºF = 0.1442 W/m.K
1 kcal/mhºC = 1.163 W/m.K
AUSTRALIAN URETHANE SYSTEMS PTY LTD A.C.N. 000 168 874 A.B.N. 50 000 168 874
Sydney 9 Prince William Drive, SEVEN HILLS NSW 2147 Phone (02) 9838 0222 Facsimile (02) 9838 0233
Brisbane Suite 73 / 283 Given Terrace, PADDINGTON QLD 4064 Phone (07) 3876 5300 Facsimile (07) 3876 5311
Melbourne PO Box 211 PORT MELBOURNE VIC 3207 Phone (03) 9646 2267 Facsimile (03) 9646 2553
Product Bulletin
AUSTHANE AU270 LD Rigid Pour Foam System
Issue Date: August 2003
Replaces: July 2001
Page 3 of 4
(3) Immediately mix the two components using LIMITATIONS AND HAZARDS
a high speed mixing blade and as soon as
mixing is complete, pour into mould/void space. In all external exposure and some internal
Mixing time of approximately 20 seconds is applications the PUR foam surface must be
normally sufficient. protected from weathering/physical deterioration
by:
Mixing
* the application of a selected elastomeric
A power-operated mixer is essential. As a membrane coating -typically acrylic,
general rule minimum requirement is a speed of polyurethane or bituminous types.
2500 RPM with a blade capable of giving high
shear with adequate turbulence. Mixing time * application of a Fibreglass/Polyester Resin
must be long enough to give complete mixing, FRP skin.
but short enough to ensure that mix and pour * application of metal sheeting or other
operations are complete within the Cream Time weatherproof treatment.
of the system, typically 30 – 35 seconds.
In specific temperature and humidity
MACHINE MIXING
conditions the effects of water vapour `drive'
There are a number of machines from several must be considered in system design and
manufacturers suitable for use with the application requirements.
AUSTHANE AU270 SERIES systems. We
recommend and sell the GUSMER, SAIP & When spraying or pouring, excessive
WEMA machine ranges. Minimum machine thickness should not be applied as the exotherm
requirements are the capability for accurate of the reaction may lead to spontaneous
metering and timing of shots, and ability to combustion, excessive pressure build up or
maintain temperature of components within a thermal expansion from the significant heat
limit of ± 2°Cof the selected temperature for developed in the foaming reaction.
each component.
Irritating vapours may be generated from both
For most applications a temperature of 25ºC to the ingredients during the foaming process. Use
30ºC for polyol and Iso is required. Viscosities only in well-ventilated areas according to
and reactivity figures may be changed by Safety and Handling guidelines as set out in
controlled temperature variation within the MATERIAL SAFETY DATA SHEETS.
operational limits.
Use foam only in temperature condition where
When using the AUSTHANE AU270 system the maximum contact surface temperature is
through polyurethane spray foam equipment, + 85ºC and the minimum contact surface
GUSMER or similar, in `injection' applications temperature is - 50ºC.
similar temperature settings are used. The
application conditions are important in Special precautions need to be taken in regard
determining an appropriate Primary Heater to system design and specification under
temperature setting/s. possible water vapour condensation temperature
conditions, or in conditions where high levels of
MOULDS water vapour/high humidity conditions may
occur.
Suitable moulds can be made from sheet metal, All polyurethane & polyisocyanurate foams
fibreglass (frp) or filled epoxy resin systems. To may present a fire hazard in certain applications
facilitate release, mould surfaces must be if exposed to fire and/or excessive heat eg.
smooth and polished and a coating of a suitable welding, and cutting torches, in the presence of
ACMOS™ Release Agent must be applied oxygen / air. The use of Polyurethane Foam in
between each ‘pour’ to allow removal of the part interior applications may present an
from the mould and easy removal of any ‘flash’ unreasonable fire hazard unless an approved
/overflow material from the mould surface. fire-resistive thermal barrier protects the foam.
A range of suitable ACMOS™ release agents is Consult the Building Code of Australia for
available and we can advise on selection and specific guidelines / information.
application. ACMOS™ 36-6482H is generally
applicable for use with AU270.
AUSTRALIAN URETHANE SYSTEMS PTY LTD A.C.N. 000 168 874 A.B.N. 50 000 168 874
Sydney 9 Prince William Drive, SEVEN HILLS NSW 2147 Phone (02) 9838 0222 Facsimile (02) 9838 0233
Brisbane Suite 73 / 283 Given Terrace, PADDINGTON QLD 4064 Phone (07) 3876 5300 Facsimile (07) 3876 5311
Melbourne PO Box 211 PORT MELBOURNE VIC 3207 Phone (03) 9646 2267 Facsimile (03) 9646 2553
Product Bulletin
AUSTHANE AU270 LD Rigid Pour Foam System
Issue Date: August 2003
Replaces: July 2001
Page 4 of 4
STORAGE AND HANDLING EXCLUSION OF WARRANTIES
Drums should be stored on pallet/s. THESE SYSTEMS ARE NOT INTENDED FOR
USE BY NON-PROFESSIONAL OR
Do not store/stand drums/pails directly on cold INEXPERIENCED DESIGNERS AND
concrete floors. APPLICATORS.
Both product containers must be kept sealed. The information presented in this bulletin
requires experience and background knowledge
Both products are moisture sensitive. for correct interpretation and application.
The POLYOL Component is hygroscopic [will
absorb water vapour from the air] which effects The potential user must perform any pertinent
it's reaction with the ISO component. tests in order to determine the product's
The ISO Component will react with absorbed performance and suitability in the intended
water vapour resulting in crystallisation. application since determination of fitness of the
product for any particular use is the responsibility
The POLYOL Component contains the 141B of the buyer.
Blowing Agent. If the POLYOL container is not
sealed, the 141B Blowing Agent will evaporate The data, information and suggestions covered
from the product causing loss of blowing / in this data sheet, are given on the basis that the
foaming effect and therefore the volume yield will materials will be used correctly and
be reduced. professionally and at the sole risk of the user.
Store containers internally / in a protected No liability is accepted by AUSTRALIAN
environment at 18ºC to 30ºC. URETHANE SYSTEMS PTY LTD, for any loss,
damage arising from the use of the within
Avoid storage near sources of radiated heat or information or materials described, no warranty,
against external walls subject to significant with expressed or implied, is given as to the
temperature variations. exclusion from any patents or as to the fitness of
the goods described for any particular purpose
and each application should be fully evaluated to
Please refer to MATERIAL SAFETY DATA the satisfaction and acceptance of the user, in
SHEETS for precautions for safe handling particular as to the combustibility or flammability
and working with each component of the or toxicity of material generated by combustion
system, danger to certain individuals and of the products herein described or materials
decontamination of spills. produced from these products.
AUSTRALIAN URETHANE SYSTEMS PTY LTD A.C.N. 000 168 874 A.B.N. 50 000 168 874
Sydney 9 Prince William Drive, SEVEN HILLS NSW 2147 Phone (02) 9838 0222 Facsimile (02) 9838 0233
Brisbane Suite 73 / 283 Given Terrace, PADDINGTON QLD 4064 Phone (07) 3876 5300 Facsimile (07) 3876 5311
Melbourne PO Box 211 PORT MELBOURNE VIC 3207 Phone (03) 9646 2267 Facsimile (03) 9646 2553
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