Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1984-12-18
1986-07-15
Briggs, Sr., Wilbert J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525489, 526279, 528 26, 528 28, C08L 8312
Patent
active
046007512
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 polyalkyleneoxy 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.
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Lee Chi-Long
Shyu Wen-Bin
Briggs Sr. Wilbert J.
Dow Corning Corporation
Rakoczy Richard E.
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