Novel cured resin, process for production thereof, and lens comp

Details Novel cured resin, process for production thereof, and lens comp Novel cured resin, process for production thereof, and lens comp

1981-05-19

1983-01-18

Hamrock, William F.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526314, C08F 1224, C08F21612

Patent

active

043692982

ABSTRACT:
A cured resin consisting substantially of a first polymer unit derived from an unsaturated compound having two terminal vinyl groups consisting of bis(alkyleneoxyphenyl)-diacrylates or dimethacrylates, bis(alkyleneoxyphenyl)diallyl ethers, and bis(alkyleneoxyphenyl)diallyl carbonates, and a second polymer unit derived from another unsaturated compound radical-polymerizable with the first-mentioned unsaturated compound, said polymer units being bonded to each other at random.
The aforesaid cured resin can be producted by copolymerizing an intimate mixture consisting substantially of at least one compound selected from the first-mentioned unsaturated compounds having two terminal vinyl groups and prepolymers thereof and at least one compound selected from other unsaturated compounds radical-copolymerizable with the first-mentioned unsaturated compounds and prepolymers thereof in the presence of a radical polymerization initiator. A lens composed of the aforesaid cured resin has a high refractive index, excellent transparency and excellent fire retardancy.

REFERENCES:
patent: 2455652 (1948-12-01), Bralley et al.
patent: 2529867 (1950-11-01), Carlson
patent: 3369058 (1968-02-01), Keenan
patent: 3835090 (1974-09-01), Gander et al.
patent: 4146696 (1979-03-01), Bond et al.

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