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US 8,877,293 B2Granted
Silicone gum emulsions
AssigneeDow Corning Corporation
InventorsSteven Mark Evans, Donald Taylor Liles, Mustafa A. Mohamed
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Abstract
A process for preparing emulsions of silicone gums is disclosed based on using an ethylene oxide/propylene oxide block copolymer as the emulsifier. The emulsions produced by the present process are useful as coatings additives for both water-based and oil-based coatings to obtain improved slip and anti-mar properties. The emulsions may also be used in the manufacture of tires as band ply lubricants. They may also be used in personal care applications.
Claims12
A process for making a silicone gum emulsion comprising:
- I) forming a dispersion consisting essentially of;
- A) 100 parts of a silicone gum,
- B) 5 to 100 parts of a ethylene oxide/propylene oxide block copolymer,
- II) admixing a sufficient amount of water to the dispersion from step I) to form an emulsion,
- III) shear mixing the emulsion to obtain average volume particle size of the dispersed silicone gum particles in the emulsions between 0.1 μm and 150 μm, and wherein no additional surfactants or emulsifiers are added in step I.
2 more elements
Dependencies are inferred from the claim text.