Strong, silicone containing polymers with high oxygen permeabili

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

1982-10-12

1984-12-04

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

351160R, 351160H, 528 24, 528 26, 528 28, 525479, C08F28300

Patent

active

044865775

ABSTRACT:
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 5000 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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