Crystalline polyester resins and process for their preparation
US6455664B1 · kind B1 · utility
8Cited by
4References
19Claims
0Family size
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Key dates
| Filing date | Nov 20, 2000 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Nov 20, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/199
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In a process for producing PCCD polyester of the formula by reacting a starting CHDM and a starting DMCD in the presence of a catalyst to produce an aliphatic alcohol and an acid interchange oligomer and forming a low viscosity PCCD, and reacting the intermediate PCCD by solid state polymerization for increasing the molecular weight of to form a PCCD having melting temperature of about 225 to about 234 degrees Centigrade and a viscosity from about 2,000 to about 20,000 poise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.