Polymerizable organic resin composition

Details Polymerizable organic resin composition Polymerizable organic resin composition

1991-01-10

1992-05-05

Michl, Paul R.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525404, 525920, 526301, 526314, C08F28302, C08F 2602

Patent

active

051108810

ABSTRACT:
A photochromic article having improved pohotochromic equilibrium response is described. In particular, a phtochromic compound is incorporation into or applied to an article, e.g., matrix, of a synthetic organic resin prepared from a composition comprising from about 55 to about 90 weight percent of a polyol(allyl carbonate), e.g., diethylene glycol bis(allyl carbonate), from about 10 to about 40 weight percent of an aliphatic polyurethane having terminal ethylenic unsaturation, e.g., an aliphatic polyesterurethane diacrylate, and from about 0 to about 5 weight percent of a difunctional monomer selected from the group consisting of allyl methacrylate and allyl acrylate. Such photochromic articles have an improved photochromic equilibrium response at ambient temperatures compared to the response of a comparable photochromic article prepared from a polyol(allyl carbonate) homopolymer, e.g., homopolymers of diethylene glycol bis(allyl carbonate), at the same ambient temperatures.

REFERENCES:
patent: 4360653 (1982-11-01), Stevens et al.

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