Patent ID: 6296916
Filing Date: 2001-10-02
Classification: C09D,G11B,Y10T

Abstract:
An optical disk provided on at least one side of the disk with a cured coating of a photopolymerizable composition comprising(A) 100 parts by weight of a mixture of (meth) acrylic acid ester monomers,(B) from 0.1 to 5 parts by weight of a surfactant having a perfluoroalkyl group and represented by the general formula (1)CF.sub.3 (CF.sub.2).sub.n AM (1)wherein A represents --CO.sub.2 -- or SO.sub.3 --, M represents an alkali metal, and n is an integer of 3 to 9, and(C) from 0.2 to 10 parts by weight of a photopolymerization initiator, andwherein the monomer mixture (A) comprises(a) from 0 to 60% by weight of a compound having at least 3 (meth) acryloyl groups,(b) from 20 to 90% by weight of a compound having two (meth) acryloyl groups,(c) from 5 to 30% by weight of a compound having one (meth) acryloyl group and containing no hydroxyl group, and(d) from 1 to 20% by weight of a compound having one (meth) acryloyl group and containing at least one hydroxyl group.