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 (Graco, Gusmer, Glas-Craft) 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 |
3-5
|
seconds |
| Tack free time |
10-16
|
seconds |
| Rise time |
20-30
|
seconds |
| Free rise density |
26-30
|
kg/m³ |
Storage, Handling and Personal Protection
Shelf Life 12 months. 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
AGRISPRAY® OS Foam
Core |
Value |
Test Method |
| Core density |
35-40 kg/m³ |
BS4370 |
| Compressive strength - Parallel to rise |
220 kpa |
BS4370 |
| Close Cell Content |
88 % min. |
ASTM D2856 |
| Thermal Conductivity |
|
|
| - Aged, <80mm |
0.028W/mK |
BS EN 12667 |
| - Aged, 80-120mm |
0.026W/mK |
BS EN 12667 |
| - Aged, >120mm |
0.025 W/mK |
BS EN 12667 |
Water Vapour Permeability
80 - 100mm, 38°C, 88% RH |
7.16 ng/Pa.sm |
BS4370 |
| Dimensional Stability -1 day @-15°C |
- 0.53 % vol.
|
BS4370 |
| 1 day @ 80°C |
+ 0.75 % vol. |
BS4370 |
| 1 day @ 100°C |
+ 0.93 % vol. |
BS4370 |
| 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 |
3.6mm |
BS4735-74 |
| Surface spread of flame |
Class 1 |
BS476 pt. 7-87 |
|
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