Isothane Durotherm OS Polyurethane Spray Foam
For full technical specification (Adobe pdf file format) on Duratherm OS right click here and select 'Save Target As' or alternatively just click to view in your browser (broadband connection preferable).
Isothane Durotherm OS is a 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 -50°C to 80°C. When tested to BS476 part 7 the foam achieves a Class 1 surface spread of flame (i.e. does not spread flame).
CFC & HCFC Free
Satisfies environmental criteria
Low Thermal Conductivity
Achieves better insulation with less thickness
Closed Cell Structure
Waterproof and resistant to ageing
Class 1 Fire Rating
Can be used for interior insulation applications
Spray Application
Ideal for refurbishment, roof bonding of slates and tiles. Minimal downtime
Chemically Inert
No release of fibres, no styrene vapours, no restrictions on use, not toxic, zero nutritional content.
Uses
* Domestic slate or tiled roofs
* Exterior or interior of agricultural buildings
* Ocean going yachts/canal barges
* Internal industrial roofing
Equipment
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 40-50°C (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 |
Polyurethane Foam 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. | |
The requirements of any relevant Agrément Certificates or British Standards should be followed. | |
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. |
Polyurethane Foam Spray Physical Properties
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 |
28-32
|
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 OS 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 |
|
Building Regulations 
