Non-hydrous soft contact lens and process for producing the same

Claim 1

A non-hydrous soft contact lens comprising a copolymer comprising, as monomer units,: (a) from 33.9 to 89 mol % of an acrylate represented by the general formula (I) shown below; (b) from 4.9 to 65 mol % of a methacrylate represented by the general formula (II) shown below; (c) from 1 to 20 mol % of at least one monomer selected from the group consisting of an unsaturated carboxylic acid, an unsaturated carboxylic acid anhydride an unsaturated carboxylic acid alkyl ester having a branched or cyclic alkyl group which may have a substituent, and an unsaturated carboxylic acid fluoroalkyl ester having a branched or cyclic fluoroalkyl group which may have a substituent; (d) from 0 to 20 mol % of at least one monomer selected from the group consisting of an acrylic acid lower alkyl ester having a straight-chain alkyl group containing 1 to 3 carbon atoms, and an acrylic acid lower fluoroalkyl ester having a straight-chain fluoroalkyl group containing 1 to 3 carbon atoms; (e) from 0 to 20 mol % of a methacrylic acid alkyl ester having a straight-chain alkyl group containing 4 to 10 carbon atoms; and (f) from 0.1 to 10 mol % of a crosslinking monomer, with the proviso that there is excluded the case where, in the above, said Component (c) is at least one selected from the group consisting of acrylic acid, an acrylic acid alkyl ester having an alkyl group containing 1 to 3 carbon atoms and an acrylic acid fluoroalkyl ester having an fluoroalkvl group containing 1 to 3 carbon atoms; said Component (d) is at least one selected from the group consisting of an acrylic acid alkyl ester having an alkyl group containing 1 to 3 carbon atoms and an acrylic acid fluoroalkyl ester having an fluoroalkyl group containing 1 to 3 carbon atoms; said Component (c) and Component (d) are contained in a total amount of 0 to 10 mole %; and said Component (e) is contained in an amount of 0 mole %. General formula (I): wherein R₁ is at least one selected from the group consisting of a straight-chain fluoroalkyl group represented by the formula: (CH₂)₁-C m F n H p , where 1 is an integer of 1 or 2, m is an integer of 3 to 8, n is an integer of 6 or more, p is an integer of 0 or more, and m, n and p have the relation of n + p = 2m + 1: and a straight-chain alkyl group represented by the formula: C q H 2q+1 , where q is an integer of 4 to 10. General formula (II): wherein R₂ is a straight-chain fluoroalkyl group represented by the formula: (CH₂) w -C x F y H z , where w is an integer of 1 or 2, x is an integer of 1 to 10, y is an integer of 3 or more, z is an integer of 0 or more, and x, y and z have the relation of y + z = 2x + 1.