Composition for high refractive index lens comprising a copolyme

Details Composition for high refractive index lens comprising a copolyme Composition for high refractive index lens comprising a copolyme

1993-10-13

1995-03-07

Kight, III, John

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 50, 528 52, 528 53, 528 58, 528 75, 528 85, 528 59, 528 60, 528 65, 528 66, 522 90, 522 96, 359642, C08G 1867, C08G 1852

Patent

active

053959094

ABSTRACT:
The present invention provides a composition comprising, as the essential components, an aromatic compound represented by the following general formula ##STR1## (m is an integer of 2-3, n is an integer of 1-3 and R is a hydrocarbon group of 3-6 carbon atoms or a hydrocarbon group of 3-6 carbon atoms containing a bivalent sulfur atom), an isocyanate compound and a radical polymerization initiator.
Said composition is useful for producing a plastic lens having a high refractive index, a small specific gravity, excellent heat resistance and excellent processability.

REFERENCES:
patent: 2858297 (1958-10-01), Melamed
patent: 2879250 (1959-03-01), Eisenmann et al.
patent: 3912717 (1975-10-01), Giacobbe et al.
patent: 5034492 (1991-07-01), Kawaki et al.

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