Photochromic plastic material

Details Photochromic plastic material Photochromic plastic material

1977-05-04

1978-08-29

Padgett, Benjamin R.

Compositions

Inorganic luminescent compositions

Tungsten containing

96 90PC, 350354, G02B 523

Patent

active

041102444

ABSTRACT:
A method for producing photochromic plastic materials is disclosed which is characterized by forming a transparent polymeric shape from a mixed polymer consisting of a polyester resin made by esterification of an unsaturated polybasic organic acid with a polyhydric alcohol, and a polar vinyl monomer, swelling a surface layer of the cured polymeric shape with a polar solvent, absorbing silver and halide ions into the swelled surface layer, and collapsing the swelled surface layer.

REFERENCES:
patent: 3779775 (1973-12-01), Chiba et al.
patent: 3875321 (1975-04-01), Gliemeroth et al.
patent: 4049567 (1977-09-01), Chu et al.

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