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Description
GP-71-SS is a dimethyl silicone copolymer fluid, containing mercaptopropyl side chains in addition to the conventional methyl group substituents. The structure of GP-71-SS is as follows where x = 83 and y = 2:
The following list summarizes some of the special features of GP-71-SS:
- Reactive Mercapto Functionality
- High Affinity for Metal Surfaces
- Corrosion Inhibiting Properties
- Better Release Agent than Conventional Silicone Fluids in many Applications
- Greater High Temperature and Oxidative Stability than Conventional Silicones
Reactions of Mercapto Silicone
The most useful reaction of the mercapto functionality of GP-71-SS involves addition to double bond compounds:
This reaction has been applied to the addition of a wide variety of olefins, including styrene, 1-alkenes, acrylic and methacrylic acids, along with unsaturated compounds. Catalysts include basic materials and peroxides. Mercapto groups also have shown reactivity with isocyanates, epoxies and sulfur cure or peroxide cure rubber elastomers.
| Typical Properties | |
|---|---|
| Appearance |
Clear, Colorless to Light Straw Liquid
|
| Weight/Gallon @ 25°C |
8.0 lbs
|
| Viscosity (cPs) @ 25°C |
100 cP
|
| Flash Point (P.M.C.C.) |
>450°F
|
| Specific Gravity |
0.97
|
| Molecular Weight (Calculated) |
6600 amu
|
| Wt. % Active |
100%
|
| Solvent Content |
0%
|
| Solubility |
Aliphatic Hydrocarbon Solvents
|
| Wt. % SH |
1%
|
| Refractive Index |
1.4103
|
Applications
- Plastic and Rubber Release Agent
- Internal Lubricant and Release Agent for Sulfur and Peroxide Cure Rubber
- Co-reactant in Vinyl Polymerizations
- Corrosion Inhibitor Coatings
- Synthesis of Organic/Silicone Copolymers
- Ingredient in UV and EB Cure Inks and Coatings
- Heat Stabilizer Additive for use in Dimethyl Silicone Fluids
Processing and Safety Guidelines
GP-71-SS may be easily mixed with aliphatic or aromatic hydrocarbon solvents. The fluid is also fully compatible with dimethyl Silicone Fluids. GP-71-SS should be handled with all of the precautions required in handling any industrial chemical product. Consult Safety Data Sheet for additional details.
Packaging/Handling/Storage
GP-71-SS is supplied in 5-gallon (18 kg.) pails, 55-gallon (200 kg.) drums and 330-gallon (1200 kg.) totes. No special storage requirements are necessary.