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Description
GP-499 is a hydrogen- terminated dimethyl polysiloxane with a nominal viscosity of 85 cSt at 25° C. The structure of GP-499 is shown below where x = 65.
The silicon-hydrogen groups of GP-499 provide a reactive site, allowing reaction with a variety of materials containing vinyl groups or with hydroxyl functional polysiloxanes in combination with heat or metal catalysts.
| Typical Properties | |
|---|---|
| Appearance |
Clear, Colorless Liquid
|
| Weight/Gallon @ 25°C |
8.0 lbs
|
| Specific Gravity |
0.97
|
| Viscosity (cPs) @ 25°C |
100 cP
|
| Wt. % Silicone |
100%
|
| Wt. % SiH |
1.1%
|
| Molecular Weight (Calculated) |
5000 amu
|
| Refractive Index |
1.4066
|
Applications
The following are some of the suggested applications for GP-499:
- Room Temperature Curing Silicone Rubber Component
- Hydrophobic Treatment of Powders and Pigments
- Water Proofing Agent for Textiles, Paper and Leather
- ABA Type Silicone Block Copolymers
Processing and Safety Guidelines
GP-499 reacts with water, alcohols, or other reactive hydrogen compounds to liberate hydrogen gas. Since the hydrogen is flammable and also will cause pressure build up in closed containers, use all proper precautions when handling these products. Alkaline materials will cause a rapid release of hydrogen when in contact with GP-499, and must be avoided. GP-499 may cause skin irritation. Consult Safety Data Sheet for additional safety information.
Packaging/Handling/Storage
GP-499 is supplied in 5-gallon (18 kg.) pails, 55-gallon (200 kg.) drums and 330-gallon (1200 kg.) totes.