Copolyesterethers
US4349469A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1981 |
| Grant date | Sep 14, 1982 |
| Priority date | — |
| Expiry date | Feb 17, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/66
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are copolyesterethers having an inherent viscosity of from about 0.8 to about 1.5 comprising PA1 A. a dicarboxylic acid component consisting essentially of 1,4-cyclohexanedicarboxylic acid having a trans isomer content of at least 70%, and PA1 B. a glycol component consisting essentially of PA2 (1) 1,4-cyclohexanedimethanol, and PA2 (2) from about 15 to about 50 weight percent, based on the weight of the polyesterether, of polytetramethyleneether glycol having a molecular weight of about 500 to about 1100, PA1 C. from about 0.1 to about 1.5 mole %, based on the mole % of the acid or glycol component, of a branching agent having at least three COOH or OH functional groups and from 3 to 60 carbon atoms, said copolyesterethers being characterized by having a die swell of between about -90% and about +100% and a minimum crystallization time of less than 2.5 minutes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.