New photochromic materials and method for their preparation

Details New photochromic materials and method for their preparation New photochromic materials and method for their preparation

1977-04-27

1978-09-26

Padgett, Benjamin R.

Compositions

Inorganic luminescent compositions

Tungsten containing

350354, G03C 1733

Patent

active

041168623

ABSTRACT:
A photochromic material comprising a transparent polymer material having a block copolymer base with a structure wherein blocks of a first polymer form a dispersed phase in a matrix phase essentially composed of blocks of a second polymer, and an organic photochromic substance uniformly distributed in said polymer material.

REFERENCES:
patent: 3530075 (1970-09-01), Wiebe
Chem. Abstracts, 82:73605d (1975).

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