AGRISPRAY OS Spray foam system
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Product Description
AGRISPRAY OS is an HCFC AND CFC FREE two component,
1:1 ratio, rigid foam system which when processed through
suitable spray machinery ( Gusmer, Glas-Craft/Probler
etc ) will produce a rigid foam of approximate density
35kg/m3 with exceptionally good compressive strength.
Service Temp range -15oC to 70oC. When tested to BS476
part 7 the foam achieves a Class 1 surface spread of
flame.
Uses
AGRISPRAY OS is used for insulation in:
- Exterior or interior of agricultural buildings
- Ocean going yachts/canal barges
- Internal industrial roofing
- Domestic slate or tiled roofs
Standard AGRISPRAY OS should not be used on
substrates below 5oC. When used externally the foam
must be protected from ultra-violet radiation and atmospheric
degradation by a suitable elastomeric coating, e.g.
ISOTHANE EM.
Equipment
AGRISPRAY OS can be processed through all standard
foam spray machines. The machine should be capable of
maintaining the mix ratio at ±2% accuracy and controlling
the component temperatures at 40-50oC (variable).
Recommended machine settings
| Block Temperature
|
Minimum, operating |
100-120°F / 40-50°C
|
| Hose Temperature |
Minimum, operating |
100°F / 40°C |
| Chemical Pressures |
Minimum, operating |
500 psi, |
| |
not
greater than 200 psi
difference iso / res |
Spray Techniques
The guidelines in Isothane Limited’s standard
specification should be followed but the general requirements
are as follows.
- The substrate should be clean, dry and free of dirt,
grease, oil and loose particles.
- In certain cases primer may be necessary to maximise
adhesion.
- Climatic conditions must be suitable for spraying
with regard to humidity and wind velocities.
- The foam should be built up in passes of not less
than 15mm and not more than 10 minutes should elapse
between passes.
- The requirements of any relevant Agrément Certificates
or British Standards should be followed.
Physical Properties
AGRISPRAY OS is a two component, modified polyurethane
rigid foam which, sprayed through suitable foam machinery,
gives a product of nominal density 35 kg/m³.
| Laboratory test results
(typical):- |
|
|
| Cream time |
3-4
|
seconds |
| Tack free time |
12-18
|
seconds |
| Rise time |
25-36
|
seconds |
| Free rise density |
24-26
|
kg/m³ |
Storage, Handling and Personal Protection
The recommendations in our Safety Data Sheet for this
product must be followed at all times. More general
information is included in our publication “A Guide
to the Safe Handling of Polyurethane Chemicals”
and in the following Technical Data Sheets which are
available on request:-
- Fire safety when Storing, Handling
and Installing Polyurethane Foam.
- Decontamination of Isocyanates
using Isothane Decontaminant.
Typical Properties Of
DURATHERM Foam
Core |
Value |
Test Method |
| Core density |
35 kg/m³ |
BS4370 |
| Compressive strength - Parallel to rise |
200 kpa |
BS4370 |
| Tensile strength - Perpendicular to rise |
110 kpa |
BS4370 |
| Shear strength - Perpendicular to rise |
145 kpa |
BS4370 |
| Close Cell Content |
92 % min. |
ASTM D2856 |
| Thermal Conductivity -10°C Mean – Initial |
0.020 W/mK |
ASTM C518 |
| - Aged |
0.026 W/mK |
(ANACON) |
| Water Absorption - 7 days no head |
0.24 kg/m² |
ASTM D2126 |
Water Vapour
Transmission- 25mm, 38° C, 88% RH |
3.9 ng/Pa.sm
|
BS4370 |
| Dimensional Stability - 7 days @ -15° C |
-0.6% vol. |
ASTM D212 |
| (Linear Change) - 7 days @ 70° C, 95% RH |
+5.0% vol. |
|
| Ozone Depletion Potential |
ZERO |
|
Burning Characteristics – These are laboratory
scale tests and bear no relation to the performance
of the material in a real fire situation. Care must
be exercised in the end use to satisfy the demands
of the Fire Authorities, and moral obligations to
the safety of persons and property.
|
| Extent of burn |
<25 mm |
BS4735-74 |
| Surface spread of flame |
Class 1 |
BS476 pt. 7-87 |
|
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