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Description
GP-218 is a 100% active polypropylene oxide modified dimethylpolysiloxane block copolymer, which is designed to improve the quality and performance of solvent-based, baked on industrial finishes. The combination of polysiloxane and pendant polypropylene oxide segments provides excellent lubricity and low surface tension, which improves the wetting, leveling and flow of solvent-based coatings. GP-218 contains stable ≡ Si – C ≡ bonds between silicone and polyol blocks and exhibits excellent resistance to hydrolysis.
| Typical Properties | |
|---|---|
| Appearance |
Clear, Colorless to Light Amber Liquid
|
| Weight/Gallon @ 25°C |
8.0 lbs
|
| Viscosity (cPs) @ 25°C |
1500 cP
|
| Flash Point (P.M.C.C.) |
>300°F
|
| Specific Gravity |
0.98
|
| Wt. % Active |
100%
|
| Wt. % Silicone |
32%
|
| Molecular Weight (Calculated) |
11000 amu
|
| Polyol Type |
Polyoxypropylene (PO)
|
| End-Cap |
Butoxy
|
| Solubility in Water |
Insoluble
|
Applications
GP-218 is recommended for evaluation in polyurethane foam systems – as a profoamer additive. Other applications include, textile and thread lubricants, internal lubricant for plastics and base material for aqueous defoaming agents.
Processing and Safety Guidelines
GP-218 has been formulated to be compatible with solvent-based coatings and adhesives. GP-218 should be handled with all of the precautions required in handling any industrial chemical product. Consult the Safety Data Sheet for additional details.
Packaging/Handling/Storage
GP-218 is supplied in 5-gallon (18 kg.) pails, 55-gallon (200 kg.) drums and 330-gallon (1200 kg.) totes. No special handling or storage is required.