Polyol(allyl carbonate) composiitons and articles prepared there

Details Polyol(allyl carbonate) composiitons and articles prepared there Polyol(allyl carbonate) composiitons and articles prepared there

1991-11-07

1993-04-06

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526314, 525455, 525920, C08F 1824, C08F28302

Patent

active

052004830

ABSTRACT:
Describes organic resin compositions of from about 30 to 90 weight percent of a polyol(allyl carbonate), e.g., diethylene glycol bis(allyl carbonate), and from about 10 to 70, e.g., 10 to 30, weight percent of a mixture of aliphatic urethanes, the terminal portions of which contain allyl or acrylyl functional groups. Polymerizable compositions prepared from such compositions produce castings which have low yellowness (b*) values and which do not pre-release from the molds in which they are formed. 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: 4637698 (1987-01-01), Kwak et al.
patent: 4686266 (1987-08-01), Tang
patent: 4994208 (1991-02-01), McBain et al.
patent: 5084529 (1992-01-01), Crano

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