Process for the production of linear polyesters, particularly for films and foils
US4960915A · kind A · utility
11Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 23, 1989 |
| Grant date | Oct 2, 1990 |
| Priority date | — |
| Expiry date | Feb 23, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/34
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the production of linear polyesters, the acid component consisting essentially of terephthalate units and the glycol component of ethylene glycol, by transesterification or direct esterification in the presence of an aluminum silicate-ethylene glycol suspension followed by polycondensation. An acidic phosphorus compound and subsequently an alkaline compound are added to the aluminum silicate before or during the formation of the suspension.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.