Photochromic plastic article and method for preparing same

Details Photochromic plastic article and method for preparing same Photochromic plastic article and method for preparing same

1987-10-15

1989-11-14

Bell, Janyce

Coating processes

Coating has x-ray, ultraviolet, or infrared properties

8471, 8507, 8509, 8514, 8519, 427164, 427322, 427333, 427336, 4272556, 4273935, 4274122, 4274123, 4274125, B05D 500, B05D 506, D06D 500

Patent

active

048806676

ABSTRACT:
Described is a method for imparting a photochromic response to a synthetic plastic article, e.g., an optical lens such as a sunglass lens prepared from an allyl diglycol carbonate monomer. The method described comprises depositing a thin uniform substantially dry film of a photochromic-bearing polymeric resin onto at least one planar surface of the synthetic plastic material, heating the plastic article and resin film substantially uniformly at temperatures near to but below the melting temperature of the photochromic substance for a time sufficient to transfer a photochromic amount of the photochromic material into the subsurface region of the plastic article, and thereafter removing the photochromic-lean resin film from the planar surface(s) of the plastic article.

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patent: 4342668 (1982-08-01), Hovey et al.
patent: 4395263 (1983-07-01), Davis
Perry's Chemical Engineers' Handbook, 4th ed., McGraw-Hill, N.Y., 1963, pp. 17-24.

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