Resin composition of polyol (allyl carbonate) and allyl terminat

Details Resin composition of polyol (allyl carbonate) and allyl terminat Resin composition of polyol (allyl carbonate) and allyl terminat

1991-09-27

1993-08-17

Henderson, Christopher

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

Synthetic resins

Processes of preparing a desired or intentional composition...

525455, 526301, C08K 504, C08K28300

Patent

active

052369781

ABSTRACT:
Describes polymerizable organic resin compositions of from about 70 to 90 weight percent of a polyol(allyl carbonate), e.g., diethylene glycol bis(allyl carbonate), and from about 30 to 70 weight percent of aliphatic polyurethane having terminal allylic unsaturation. The polymerizable compositions have initiated pot life times of at least about 24 hours at 25.degree. C. and castings that have low yellowness (b*) values. Polymerizates prepared from such compositions may be used to prepare photochromic articles, e.g., lenses, by incorporating a photochromic substance, e.g., by thermal transfer, into the polymerizate.

REFERENCES:
patent: 3565814 (1971-02-01), Pellon
patent: 4360653 (1982-11-01), Stevens et al.
patent: 4613656 (1986-09-01), Tang
patent: 4994208 (1991-02-01), McBain et al.
patent: 5084529 (1992-01-01), Crano

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