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US 7,678,849 B2Granted
High chroma hals stabilized polymer composition
AssigneeHonda Motor Co., Ltd.
InventorsEric Walker, Jim Ryan, Elie Merheb
Life of this patent
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Abstract
High chroma colored thermoplastic polyolefin compositions having enhanced weatherability are disclosed. The compositions incorporate ultraviolet light absorbers and hindered amine light stabilizers.
Claims20
A colored non-black composition comprising:
- about 58 to about 66 wt. % polypropylene;
- about 26 to about 31 wt. % rubber;
- about 6.5 to about 10.5 wt. % talc;
- about 0.5 to about 3 wt. % non-black organic colorant;
- about 0.1 to about 0.8 wt. % 2-(2H-benzotriazol-2-yl)-4,6-di-t-pentylphenol;
- and
- about 0.2 to about 0.9 wt. % of a mixture of 2,2,6,6-tetramethyl-4-piperidylstearate and a hexadecyl ester of 3,5-di-t-butyl-4-hydroxybenzoic acid,
- wherein the chroma value of the colored non-black composition is between about 3 and about 25, and the composition is non-black in color.
5 more elements
A method of increasing the weatherability of a high chroma thermoplastic polyolefin colored non-black composition comprising:
- incorporating about 0.1 to about 0.8 wt. % 2-(2H-benzotriazol-2-yl)-4,6-di-t-pentylphenol, and about 0.2 to about 0.9 wt. % of a mixture of 2,2,6,6-tetramethyl-4-piperidylstearate and a hexadecyl ester of 3,5-di-t-butyl-4-hydroxybenzoic acid into a high chroma thermoplastic polyolefin colored non-black composition which comprises at least 58 wt. % thermoplastic polyolefin;
- about 58 to about 66 wt. % polypropylene;
- about 26 to about 31 wt. % rubber;
- about 6.5 to about 10.5 wt. % talc;
- about 0.5 to about 3 wt. % non-black organic colorant
- wherein the high chroma thermoplastic polyolefin colored non-black composition has a chroma value ranging from between about 3 and about 25, and further comprises an organic colorant.
3 more elements
Dependencies are inferred from the claim text.