C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
88/40, 402/480
C08F 226/08 (2006.01) C08F 226/06 (2006.01) G02B 1/04 (2006.01)
Patent
CA 1223398
ABSTRACT: A water-absorptive contact lens made of a copolymer consisting essentially of: (a) from about 50 to about 95 parts, by weight of the total monomer units, of hydrophilic monomer units consisting essentially of from about 25 to 100 parts, by weight of the total hydrophilic monomer units, of N- methyl-3-methylene-2-pyrrolidone represented by the formula: Image (I) and from 0 to about 75 parts, by weight of the total hydrophilic monomer units, of N-vinyl-2-pyrrolidone; and (b) from about 5 to about 50 parts, by weight of the total monomer units, of reinforcing monomer units consisting essentially of at least one monomer selected from the group consisting of alkyl acrylates, alkyl methacrylates, styrene, alkyl styrenes, benzyl acrylate and benzyl methacrylate.
467314
Kako Hiroyuki
Shibata Takanori
Yamanaka Masashige
Marks & Clerk
Toyo Contact Lens Co. Ltd.
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