METHOD FOR PRODUCING A PHOTOCHROMIC PLASTIC ARTICLE
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United States of America Patent
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app pub date -
Nov 16, 2007
filing date -
May 18, 2005
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Abstract
A method for producing a photochromic synthetic resin object, comprising: (a) applying a layer, comprising at least one liquid monomer suitable for forming a polymer and at least one photochromic dyestuff, to at least one internal surface area of a first casting mold situated in a casting assembly, and partially or completely curing the layer to form a photochromic polymer layer;(b) optionally applying a protective layer to the completely or partially cured photochromic polymer layer, and curing the protective layer;(c) introducing a casting resin into the casting assembly which comprises a predetermined mold cavity formed by the first casting mold together with a second casting mold in the casting assembly, and(d) curing the casting resin to form a photochromic synthetic resin object;and a photochromic synthetic resin object produced by this method.
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