Extrudable, low-migration organic silicone copolymers of high transparency, their preparation and use

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United States of America Patent

PATENT NO 7153581
APP PUB NO 20030195316A1
SERIAL NO

10354498

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Abstract

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The invention provides organic silicone copolymers based on a) from 30 to 99% by weight of a vinylaromatic, (meth)acrylic ester, vinyl ester, olefin, diene, and/or vinyl halide monomer, and b) from 1 to 70% by weight of a mixture of at least two diorganopolysiloxanes having the general formula R.sup.1.sub.aR.sub.3-aSiO(SiR.sub.2O).sub.nSiR.sub.3-aR.sup.1.sub.a, in which each R denotes a monovalent, optionally substituted, C.sub.1-18 alkyl or C.sub.1-18 alkoxy radical, R.sup.1 denotes a polymerizable group, a is 0 or 1, at least one a being 1, and n is an integer, where b1) from 5 to 65% by weight of the silicone component b) is a diorganopolysiloxane with n.ltoreq.30 and only one terminal polymerizable group R.sup.1, and b2) from 35 to 95% by weight of the silicone component b) is a diorganopolysiloxane with n.gtoreq.55 and with one or two terminal polymerizable groups R.sup.1.

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Patent Owner(s)

Patent OwnerAddress
WACKER POLYMER SYSTEMS GMBH & CO KGJOHANNES-HESS-STRASSE 24 84489 BURGHAUSEN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Stark, Kurt Burgkirchen, DE 49 270

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