Patent ID: 6541572
Filing Date: 2003-04-01
Classification: C08F,G02B

Abstract:
A method of preparing an ophthalmic device material comprising the steps ofa) forming a copolymer having pendant oxirane groups by free radical copolymerization of a composition comprising (i) one or more aryl acrylic hydrophobic monomers of the formula wherein:X is H or CH3; m is 2-4; Y is nothing, O, S, or NR wherein R is H, CH3, CnH2n+1â€œ, wherein n=1-10,â€ , and iso-OC3H7, C6H5, or CH2C6H5; and Ar is C6H5 which can be unsubstituted or substituted with H, CH3, C2H5, n-C3H7, iso-C3H7, OCH3, C6H11, Cl, Br, C6H5, or CH2C6H5; and (ii) a total of about 30% by weight or less of one or more compounds of the formula whereinX is H or CH3; and n is 1-4; and (b) reacting the copolymer containing pendant oxirane groups formed in step (a) with one or more compounds of the formula Wâ€”Tâ€”Hâ€ƒâ€ƒ(III) whereinW is H, CH3(CH2)a, or Z(OCH2CH2)b; a is 0-3; b is 1-5; Z is H or CH3(CH2)p; p is 0-3; and T is O, NH, or S; provided that if Tâ‰ O, then Wâ‰ H.