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

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

1984-11-06

1985-09-17

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

350409, 350410, 523106, 526291, 5262921, C08F21800

Patent

active

045422010

ABSTRACT:
Disclosed herein are a resin for high-refractivity lenses, formed by copolymerizing at least one carbonate compound represented by the general formula (I): ##STR1## 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): ##STR2## wherein R' is a hydrogen atom or a methyl group and Y represents ##STR3## 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.

REFERENCES:
patent: 2455652 (1948-12-01), Bralley et al.
patent: 2529867 (1950-11-01), Carlson
patent: 2587442 (1952-02-01), Carlson
patent: 4260564 (1981-04-01), Baiocchi et al.
patent: 4306780 (1981-12-01), Tarumi et al.
patent: 4310642 (1982-01-01), Margotte et al.

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