Polyester/polycarbonate blends with reduced yellowness
US6723768B2 · kind B2 · utility
65Cited by
46References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 27, 2002 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Apr 24, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/49
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Thermoplastic compositions of polyester/polycarbonate blends have reduced yellowness and improved thermal and melt stability when the polyester is produced with a reduced level of a titanium-containing catalyst in an amount of from about 1 to about 30 ppm elemental titanium, with ppm based on the total weight of the polyester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.