Method for the preparation of polyalkylene terephthalate resin compositions employing titanium-containing catalyst complex
US9145470B2 · kind B2 · utility
4Cited by
9References
16Claims
0Family size
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Key dates
| Filing date | Jul 25, 2013 |
| Grant date | Sep 29, 2015 |
| Priority date | — |
| Expiry date | Nov 23, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process of preparing a polyalkylene terephthalate comprising reacting an alkylene diol and an aromatic dicarboxy compound that is an aromatic dicarboxylic acid, aromatic dicarboxylic (C1-C3)alkyl ester, or a combination thereof, wherein ester interchange and polymerization occurs in the presence of a catalyst complex formed by the reaction of tetraisopropyl titanate and a boron, phosphorous or nitrogen-containing complexing agent, which catalyst can be synthesized in situ prior to ester interchange and introduced to a mixture of the alkylene diol and the aromatic dicarboxy compound prior to ester interchange.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.