Colour-stable LED substrates

1. A composition comprising,

a) a transparent or translucent polymer or polymer blend in an amount which together with components b) to g) gives 100 wt. %,

b) optionally 0 ppm to 2500 ppm of one or more stabilisers,

c) 0.001 ppm to 10,000 ppm of at least one dye comprising structure 1a and/or 1b,

wherein

Ra and Rb, independently of one another, represent a linear or branched alkyl radical, or a halogen;

n, independently of one another, represents a natural number between 0 and 3, wherein, in the case of n=0, the radical would be hydrogen;

d) 0.001 ppm to 10,000 ppm of at least one dye selected from the group consisting of dyes differing from dyes having structure 1a and/or 1b based on perinone or indanthrone and dyes based on a phthalocyanine or phthalocyanine complex,

e) optionally 0 ppm to 3000 ppm of one or more release agents,

f) optionally 0 ppm to 6000 ppm of one or more UV absorbers,

g) optionally 0 ppm to 500,000 ppm of one or more further additives.

2. The composition according to claim 1 , wherein the transparent or translucent polymer or polymer blend comprises polycarbonate.

3. The composition according to claim 1 , wherein components c) and d) are each included in a proportion of 0.01 ppm to 5 ppm in addition to components a), b), e), f) and g).

4. The composition according to claim 1 , wherein components c) and d) are each included in a proportion of 10 ppm to 500 ppm in addition to components a), b), e), f) and g).

5. The composition according to claim 1 , wherein component d) is a dye selected from the group consisting of dyes having structures 2a, 2b, 3a, 3b and 4

wherein for (2a) and (2b)

Rc and Rd, independently of one another, represent a linear or branched alkyl radical, or halogen;

n, independently of one another, represents a natural number between 0 and 3, wherein, in the case of n=0, the radical would be hydrogen;

and wherein for (3a) and (3b)

the radicals R(5-20) represent, independently of one another, hydrogen, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, hexyl, thexyl, fluorine, chlorine, bromine, sulfone or CN, and

M represents an element selected from the group consisting of aluminium, nickel, cobalt, iron, zinc, copper and manganese;

wherein

R1 and R2, independently of one another, represents a linear or branched alkyl radical, or halogen;

n denotes a natural number between 0 and 4.

6. The composition according to claim 1 , wherein the ratio of c) to d) is 1:1.

7. The composition according to claim 1 , wherein components c) and d) are used as mixtures of isomers, and wherein the proportion of isomers in the individual mixtures are 1:1.

8. The composition according to claim 1 , wherein components c) and d) are each used as pure isomers.

9. The composition according to claim 1 , wherein the composition has a transmission, measured on 4-mm-thick specimens in accordance with ISO 13468-2, of at least 80% and a haze of at most 5%.

10. The composition according to claim 1 , wherein the composition is translucent and has a transmission (measured on 4-mm-thick specimens in accordance with ISO 13468-2) of less than 80% and greater than 20% and/or a haze of greater than 5%.

11. The composition according to claim 1 , wherein component c is a substance corresponding to structures 1a and 1b with n=0 in all rings, such that all Ra and Rb are hydrogen, and wherein structures 1a and 1b are present side by side in a ratio of 1:1.

12. The composition according to claim 1 , wherein component d is a substance corresponding to structures 2a and 2b with n=0 in all rings, such that all Ra and Rb are hydrogen, and wherein structures 2a and 2b are present side by side in a ratio of 1:1.

13. The composition according to claim 1 , wherein component d is a substance corresponding to structure 3b, wherein all R(5-20) are hydrogen and M is Cu.

14. The composition according to claim 1 , wherein component d is a substance corresponding to structure 4, wherein R1 and R2 are hydrogen.

15. The composition according to claim 11 , wherein component d is a substance corresponding to structures 2a and 2b with n=0 in all rings, such that all Ra and Rb are hydrogen, and wherein structures 2a and 2b are present side by side in a ratio of 1:1.

16. The composition according to claim 11 , wherein component d is a substance corresponding to structure 3b, wherein all R(5-20) are hydrogen and M is Cu.

17. The composition according to claim 11 , wherein component d is a substance corresponding to structure 4, wherein R1 and R2 are hydrogen.

18. A colored molded object obtained from a composition comprising

a) 0.001 ppm to 10,000 ppm of at least one dye comprising structure 1a and/or 1b,

wherein

Ra and Rb, independently of one another, represent a linear or branched alkyl radical, or a halogen;

n, independently of one another, represents a natural number between 0 and 3, wherein, in the case of n=0, the radical would be hydrogen; and

b) 0.001 ppm to 10,000 ppm of at least one dye selected from the group consisting of dyes differing from dyes having structure 1a and/or 1b based on perinone or indanthrone and dyes based on a phthalocyanine or phthalocyanine complex,

wherein the colored molded objects have a high color stability when exposed to LED light.

19. An optical component obtained from moulding compositions which comprises compositions according to claim 1 .

20. A multi-layer system comprising the composition according to claim 1 .