Segmented thermoplastic copolyesters endowed with elastomeric properties
US4994549A · kind A · utility
5Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1989 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | Jun 30, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/0066
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Segmented thermoplastic copolyesters having elastomeric properties, containing from 25% to 80% by weight of short-chain polyester units derived from dicarboxylic acids and a diol, and from 20 to 70% by weight of long-chain polyester units derived from dicarboxylic acids and poly(alkylene oxide)-glycols in which at least 10% by weight of the poly-(alkylene oxide)-glycols has a molecular weight lower than 300, and a C/O ratio within the range of from 1.8 to 4.3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.