Patent ID: 7993755

Claim:
A polyamide molding composition comprising at least one transparent polyesteramide in a proportion by weight of from 70 to 99.99% by weight; at least one further polymer in a proportion by weight of from 0 to 30% by weight; at least one photochromic dye in a proportion by weight of from 0.01 to 2% by weight; and wherein the transmittance of the at least one transparent polyesteramide and the further polymer and of the polyamide molding composition is at least 80% in the wavelength range from 500 to 700 nm when the at least one transparent polyesteramide in pure form, or the polyamide molding composition, or the further polymer in pure form, takes the form of a thin plaque of thickness 2 mm, wherein haze of the at least one transparent polyesteramide and of the further polymer and of the polyamide molding composition is at most 10% when the at least one transparent polyesteramide in pure form, or the polyamide molding composition, or the further polymer in pure form, takes the form of a thin plaque of thickness 2 mm, wherein the further polymer is a homopolyamide selected from the group of MACM12, MACM14, MACM18, or wherein the further polymer is a copolyamide selected from the group of MACM12/PACM12, MACM14/PACM14, MACM18/PACM18, or wherein the further polymer is a homopolyamide or copolyamide based on aromatic dicarboxylic acids having from 8 to 18 carbon atoms, or is a mixture of homopolyamides or copolyamides of this type or is selected from the group of: 6I/6T, TMDT, 6I/MACMI/MACMT, 6I/6T/MACMI, MACMI/MACM36, 6I, 12/PACMI, 12/MACMI, 12/MACMT, 12/MACM12, 6/PACMT, 6/6I, 6/IPDT, and wherein the at least one transparent polyesteramide is a polyesteramide that is (1) based on at least one polyamide based on dicarboxylic acids and on diamines, said diamine selected from the group of: MACM, PACM, and based on at least one polyester fraction or ester fraction based on a diol and on a dicarboxylic acid, or (2) based on laurolactam or on aminolauric acid, and based on at least one polyester fraction or ester fraction based on a diol and on a dicarboxylic acid.