Patent ID: 8466209
Filing Date: 2013-06-18
Classification: A61L,C08F

Abstract:
1. A copolymeric ophthalmic device material formed by polymerizing a mixture comprising a) 30-60% (w/w) of an aryl acrylic hydrophobic monomer of formula (I) wherein: A is H; B is (CH u is 1-4; v is 1-4; C is (CH m is 1-6; n is 1-10; Y is nothing, O, S, or NR, provided that if Y is O, S, or NR, then B is (CH R is H, CH w is 0-6, provided that m+w≦8; and D is H, C b) 0.1-3.9% (w/w) of a macromer of formula (II) wherein R R z is 2-11; and x indicates the number of repeating units and determines the molecular weight of the macromer and is such that the macromer has a molecular weight of about 300-about 3500; c) 10-40% (w/w) of 2-ethylhexyl acrylate or n-octyl acrylate; d) 5-30% (w/w) of a hydrophilic monomer selected from the group consisting of: hydroxy(C e) a cross-linking monomer; and f) a reactive UV absorber; wherein the copolymeric ophthalmic device material has an equilibrium water content at 35° C. of less than 4%.