Manufacture of polyesters
US4070342A · kind A · utility
2Cited by
8References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1976 |
| Grant date | Jan 24, 1978 |
| Priority date | — |
| Expiry date | Dec 20, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L67/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In a continuous process for production of polyester polymers, polymer additives are added to the process stream at a point where the polymer is molten by injecting a stable liquid dispersion formed from a liquid polyisobutene and the requisite polymer additives. The process is particularly useful in production of thermally stabilized polyesters wherein a stabilizing amount of a copper complex compound is incorporated therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.