Patent ID: 6762264
Filing Date: 2004-07-13
Classification: C08F,C08G,C08L,G02B

Abstract:
A hydrogel formed from the polymerization product of a monomer mixture comprising:(a) a mixture of polysiloxane prepolymers represented by formulae (I) and (II): â€ƒwherein: each A and Aâ€² is an activated unsaturated radical; Aâ€³ is an alkyl group; each R1-R10 is independently an alkyl, fluoroalkyl, alcohol, ether, or fluoroether group having 1-10 carbons, or an aromatic group having 6-18 carbons; each m, n, and p are independently 0 to 200, m+n+p being from about 23 to 200; each a is 1 to 10; and each b is 0to 10; and (b) a hydrophilic monomer, wherein the monomer mixture further comprises a monofunctional, ethylenically unsaturated silicone-containing monomer represented by the formula: â€ƒwherein: X denotes â€”COOâ€”, â€”CONR4â€”, â€”OCOOâ€”, or â€”OCONR4â€” where each R4 is independently H or lower alkyl; R3 denotes hydrogen or methyl; h is 1 to 10; and each R2 independently denotes a lower alkyl radical, a phenyl radical or a radical of the formula â€”Si(R5)3 wherein each R5is independently a lower alkyl radical or a phenyl radical.