Photochromic molding compositions and articles produced therefrom
First Claim
1. A polyamide molding composition comprisinga proportion by weight of from 50 to 99% by weight of at least one transparent homopolyamide and/or copolyamide;
- a proportion by weight of from 1 to 50% by weight of at least one further polymer whose glass transition temperature is below 80°
C.;
a proportion by weight of from 0.001 to 2.0% by weight of at least one photochromic dye;
and also, optionally,further dyes and/or additives.
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Abstract
A polyamide molding composition is described, comprising a proportion by weight of from 50 to 99% by weight of at least one transparent homopolyamide and/or copolyamide, a proportion by weight of from 1 to 50% by weight of at least one further polymer whose glass transition temperature is below 80° C., and also a proportion by weight of from 0.001 to 2.0% by weight of at least one photochromic dye. Further dyes and/or additives can optionally be present. The invention moreover encompasses articles manufactured therefrom, a particular example being photochromic ophthalmic lenses.
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Citations
31 Claims
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1. A polyamide molding composition comprising
a proportion by weight of from 50 to 99% by weight of at least one transparent homopolyamide and/or copolyamide; -
a proportion by weight of from 1 to 50% by weight of at least one further polymer whose glass transition temperature is below 80°
C.;a proportion by weight of from 0.001 to 2.0% by weight of at least one photochromic dye; and also, optionally, further dyes and/or additives. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification