C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/2006
C08F 283/12 (2006.01) C08F 290/06 (2006.01) C08F 290/14 (2006.01) C09D 4/06 (2006.01) C09D 151/08 (2006.01) C09D 155/00 (2006.01)
Patent
CA 1241478
HYDROPHILIC SILICONE-ORGANIC COPOLYMER ELASTOMERS ABSTRACT This invention provides compositions which are curable to hydrophilic, water-absorbing silicone-organic copolymer elastomers via free radical polymerization such as by the use of free radical precursors, UV or electron beam. The compositions are mixtures of (A) from 50 to 95 parts by weight of block copolymers containing polydiorganosiloxane segments and polyalkyleneoxy segments which block copolymers contain terminal aliphatically unsaturated groups such as those derived from the reaction of isocyanoethyl methacrylate with terminal free hydroxyl groups present on the poly- alkyleneoxy segments and (B) from 5 to 50 parts by weight of at least one substantially water insoluble aliphatically unsaturated organic monomer which is compatible with (A) such as methyl methacrylate. The cured elastomers, some of which are optically clear, are useful as membranes for gas or fluid separations or for the controlled release of bioactive agents such as insecticides or herbicides.
495414
Lee Chi-Long
Shyu Wen-Bin
Dow Corning Corporation
Gowling Lafleur Henderson Llp
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