Preparation method of polyester resin
US9284405B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2013 |
| Grant date | Mar 15, 2016 |
| Priority date | — |
| Expiry date | May 21, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/916
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a polyester resin including: moieties of dicarboxylic acid components including terephthalic acid; and moieties of diol components including isosorbide, a cyclohexanedimethanol, and the balance of other diol compounds. The polyester resin contains a zinc-based catalyst and a phosphorus-based stabilizer. The present invention also provides a method for preparing the polyester resin. The method includes: esterifying diol components including isosorbide, a cyclohexanedimethanol, and the balance of other diol compounds, with dicarboxylic acid components including terephthalic acid in the presence of an esterification reaction catalyst including a zinc compound; adding a phosphorus-based stabilizer to the esterification reaction mixture at the time when the degree of esterification reaches at least 80%; and subjecting the esterification reaction product to polycondensation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.