Polyamide/aliphatic polyester block copolymer, process for the production thereof, and blend containing the same
US5446109A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1994 |
| Grant date | Aug 29, 1995 |
| Priority date | — |
| Expiry date | Feb 23, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/938
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyamide/aliphatic polyester block, copolymer (A) comprising a polyamide block and an aliphatic polyester block, (B) satisfying the expression T.sub.1 -T<100-C (in which T is the melting point (.degree.C.) of the above block copolymer, T.sub.1 is the melting point (.degree.C.) of a polyamide composed of the polyamide block and C is the content (wt. %) of the polyamide block), (C) exhibiting the extraction amount which satisfies the expression, when extracted in tetrahydrofuran, E<(100-C).times.0.4 (in which E is the extraction amount (wt. %) when the block copolymer is refluxed in tetrahydrofuran, and C is the content (wt. %) of the polyamide block) and (D) having an intrinsic viscosity, measured at 35.degree. C., in the range of from 0.5 to 5; a process for the production thereof; a fiber formed therefrom; and an intimate blend comprising a thermoplastic resin having no or poor compatibility with polyamide and the block copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.