Process for increasing molecular weight of polybutylene terephthalate
US4246377A · kind A · utility
1Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1979 |
| Grant date | Jan 20, 1981 |
| Priority date | — |
| Expiry date | Oct 19, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/916
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Molecular weight of PBT is increased by melt processing with bis azido formyl ethylenedioxy phthalate, bis azido formyl propylenedioxy phthalate and mixtures thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.