Esterification catalyst, polyester process and polyester article
US7767612B2 · kind B2 · utility
2Cited by
13References
56Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 21, 2001 |
| Grant date | Aug 3, 2010 |
| Priority date | — |
| Expiry date | May 16, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/52
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst composition for producing polyesters comprises: a) an organometallic compound obtained by reacting an orthoester or condensed orthoester of titanium, zirconium or aluminum, an alcohol containing at least two hydroxyl groups, a 2-hydroxy carboxylic acid and a base; and b) at least one compound comprising germanium, antimony or tin. Polyesters obtained by esterification reaction in the presence of the catalyst compositions according to the present invention exhibit improved melt properties and are particularly suitable for production of textile and commercial fibers, films and rigid packaging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.