Copolyamides with long-chain polyamide units
US5700900A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1995 |
| Grant date | Dec 23, 1997 |
| Priority date | — |
| Expiry date | Sep 15, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/36
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A copolyamide composition and article molded therefrom, the molded article being transparent, being especially rigid, tough and cold impact resistant, having good resistance to solvents, and exhibiting negligible changes in mechanical properties in the conditioned state due to very low water absorption. The copolyamide composition including long-chain monomer building blocks and being comprised of from about 30 to about 96 parts by weight of at least one long-chain monomer which is suitable as a long-chain building block for a polyamide and which has from 9 to 12 carbon atoms; and from about 4 to about 70 parts by weight of precursor monomers for semiaromatic polyamides, which precursor monomers comprise at least one diamine, H.sub.2 N--R--NH.sub.2, and at least one aromatic dicarboxylic acid in an approximately equimolar ratio with one another, wherein R is a radical selected from the group consisting of a straight-chain radical having 2 to 12 carbon atoms, an aliphatic radical having 2 to 12 carbon atoms, an araliphatic radical having 7 to 12 carbon atoms, and a cycloaliphatic radical having 6 to 42 carbon atoms. Advantageously, up to about 15 mole percent of the at least one aro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.