Resin for high-refractivity lenses and lenses made of same...

Details Resin for high-refractivity lenses and lenses made of same... Resin for high-refractivity lenses and lenses made of same...

C - Chemistry, Metallurgy

08

F

402/173, 88/40

C08F 218/00 (2006.01) G02B 1/04 (2006.01)

Patent

CA 1216698

ABSTRACT Disclosed herein are a resin for high- refractivity lenses, formed by copolymerizing at least one carbonate compound represented by the general formula (I): Image (I) wherein X is a hydrogen, chlorine or bromine atom, and R is a hydrogen atom or a methyl group with at least one unifunctional monomer represented by the general formula (II): Image (II) wherein R' is a hydrogen atom or a methyl group and Y represents Image , Image , Image , Image or Image wherein X' is a chlorine or bromine atom, q is an integer of 0-5, and r is 0 or 1 as well as high- refractivity lenses made of such a resin. The lens-making resin according to this invention has a high refractive index, is excellent in processability such as grinding processability, thermal resistance, solvent resistance and impact resistance. Moreover, it features outstanding miscibility between the unifunctional monomer and the carbonate upon copolymerization thereof, and minimized polymerization strain.

467539

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