Aliphatic diol polycarbonates and their preparation
US7138479B2 · kind B2 · utility
22Cited by
11References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 28, 2004 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Aug 8, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The disclosure provides high quality, low yellowness index copolycarbonates comprising structural units derived from at least one aliphatic diol, at least an aromatic dihydroxy compound and a diaryl carbonate. Also disclosed herein is a method of making such copolycarbonates in presence of one or more catalysts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.