Patent ID: 9029440
Filing Date: 2015-05-12
Classification: C08K

Abstract:
1. A polymer composition comprising a. at least one transparent polycarbonate or copolycarbonate; b. at least one inorganic IR absorber selected from the group consisting of boride compounds, tungstates, and mixtures thereof, c. optionally an inorganic, nano-scale pigment, d. a colouring agent or a colouring agent combination having structures selected from: III. (1a) and/or (1b), (7) IV. (1a) and/or (1b), (4), (7) V. (1a) and/or (1b), (5), (7) X. (3), (4) XL (3), (5) XIV. (3), (4), (7) XV. (3), (5), (7) XX. (1a) and/or (1b), (8b) XXI. (7), (4) XXII. (7), (5), wherein the structures are as follows: wherein wherein wherein wherein 8b: wherein wherein the colouring agent of structure (7) has a bulk volume of from 2 to 10 l/kg, a specific surface area of from 5 to 60 m2/g, and a pH value of from 4 to 9, and wherein the nano-scale pigment is carbon black and the IR absorber is lanthanum hexaboride.