Halogen-containing resin lens material

Details Halogen-containing resin lens material Halogen-containing resin lens material

C - Chemistry, Metallurgy

08

F

402/415, 402/451

C08F 220/20 (2006.01) B29D 11/00 (2006.01) C08F 220/30 (2006.01) G02B 1/04 (2006.01)

Patent

CA 1252249

ABSTRACT OF the DISCLOSURE A halogen-containing resin lens material, having a re- fractive index of nD - 1.55 or higher, an Abbe number of 27 or higher and good dyeable property and comprising a copolymer con- taining 10 to 90 wt.% of a monomer (I) represented by the formula (I) shown below: Image ......... (I) wherein: R1 represents hydrogen or CH3 group; X1 a halogen atom except for flourine and p the number of substituted halogens which is an integer selected from 1 to 5, and n is an integer selected from 1 to 4, R1 existing in plural number and being either identical or different, X1 when existing in plural number being either identical or different and 10 to 70 wt.% of a cross- linking monomer having two or more polymerizable functional groups (the percentages being based on the copolymer weight).

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