Oil gel formulations containing polystyrene-polydimethylsiloxane or polyethylene-polydimethylsiloxane block copolymers dissolved in siloxane monomers
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United States of America Patent
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May 1, 2001
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N/A
app pub date -
May 7, 1999
filing date -
May 8, 1998
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Expired
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Abstract
This invention is a silicone oil gel composition which is comprised of a silicone block copolymer selected from the group consisting of polyethylene-polydimethylsiloxane block copolymers and polystyrene-polydimethylsiloxane block copolymers wherein the overall number average molecular weight is from 2000 to 251,000, the polystyrene content (PSC) is 40% or less by weight, the polystyrene block number average molecular weight is from 1000 to 30,000, and the polyethylene number average block molecular weight is from 1000 to 20,000, the polydimethylsiloxane number average molecular weight is from 1000 to 250,000, wherein the block copolymer is dissolved in a silicone oil which is a cyclic or linear siloxane monomer. Preferred siloxane monomers for use herein are (Me.sub.2 SiO).sub.3, (Me.sub.2 SiO).sub.4, and (Me.sub.2 SiO).sub.5.
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