Catalyst for preparation of polyester and process for preparing polyester using the catalyst
US7544762B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2002 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Jul 16, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyester having a good color tone (a high L value and a low b value) and a low acetaldehyde content is obtained by using a catalyst containing a reaction product of (A) a titanium compound (1) represented by the general formula (I) and/or a titanium compound (2) obtained by reacting the titanium compound (1) of the general formula (I) with an aromatic polyhydric carboxylic acid represented by the general formula (II) or an anhydride thereof, with (B) a phosphorus compound (3) represented by the general formula (III).[wherein R1, R2, R3, R4 and R5=a C2-C10 alkyl group, k=1 to 3, m=2 to 4, and R6=a substituted or non-substituted C6-C20 aryl group or a C6-C20 alkyl group].
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.