Rapidly crystallizing polyester materials and a process for their preparation
US4705844A · kind A · utility
32Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1986 |
| Grant date | Nov 10, 1987 |
| Priority date | — |
| Expiry date | Sep 5, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to rapidly crystallizing polyester materials and a process for their preparation, in which, in a first stage, the polyester is prepared in the presence of an (alkaline earth) alkali metal or of an (alkaline earth) alkali metal compound, and then, in a second stage, further non-nucleated polyesters and a crystallization accelerator in a adequate amount are, if required, added to this polyester. The polyesters according to the invention are distinguished in particular by reduced molecular weight degradation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.