Poly(1,3-propylene terephthalate)
US5340909A · kind A · utility
83Cited by
17References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1991 |
| Grant date | Aug 23, 1994 |
| Priority date | — |
| Expiry date | Dec 18, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/78
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing poly(1,3-propylene terephthalate) from the reaction of either terephthalic acid or a lower dialkyl ester of terephthalic acid and 1,3-propanediol and polymerization of the monomer produced therefrom using a novel catalyst system. The novel catalyst composition includes employing an effective catalytic amount tin in the polycondensation reaction. Using the catalyst system and Hostaperm.RTM. pigments allows for the production of poly(1,3-propylene terephthalate) having yellowness of less than 4 and an IV of at least 0.80 dl/g.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.