Strong, silicone containing polymers with high oxygen...

Details Strong, silicone containing polymers with high oxygen... Strong, silicone containing polymers with high oxygen...

C - Chemistry, Metallurgy

08

F

88/40, 400/5305

C08F 299/08 (2006.01) B24D 11/00 (2006.01) C08F 290/14 (2006.01) C08G 18/61 (2006.01) C08G 18/67 (2006.01) G02B 1/04 (2006.01)

Patent

CA 1258935

STRONG, SILICONE CONTAINING POLYMERS WITH HIGH OXYGEN PERMEABILITY Abstract of the Disclosure Clear, strong, crosslinked polymers are described, which are obtained by copolymerization of (A) 8-70% of a linear or branched polysiloxane of 400-100,000 molecular weight (MW) containing at least two terminal or pendant, polymerizable, vinyl groups per each 500 MW unit of polysiloxane and which are attached to the polysiloxane through at least two urethane, thiourethane, urea or amide linkages and (B) 30-92% of a mono- or divinyl compound or a mixture of such monomers consisting of 85 to 100% of water insoluble monomers. These polymers are useful in the preparation of hard or soft contact lenses.

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