Non-streaking black color formulations for polycarbonate-siloxane copolymers and blends
US6822041B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2002 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Nov 21, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/0041
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a black resin composition comprising:a polycarbonate-siloxane copolymer resin, the copolymer comprising polycarbonate units and polyorganosiloxane units wherein the median siloxane domain size is greater than 100 nanometers; anda colorant combination comprising at least one organic colorant and at least one inorganic colorant, wherein the combination of the organic and inorganic colorant results in a black molded part with an L* value of less than about 29 and C* value of less than about 1.5 (specular component included) or L* value of less than 8 and C* value of less than about 3 (specular component excluded).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.