Polyamide elastomer
US4438240A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 1983 |
| Grant date | Mar 20, 1984 |
| Priority date | — |
| Expiry date | May 25, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/44
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided is a polyether-ester-amide consisting essentially of about 5 to 50 weight percent of polaymide segment (A) and about 95 to 50 weight percent of polyether ester segment (B), and having a melting point not lower than 160.degree. C., a Shore hardness in the range of 80A to 45D, a tensile modulus in the range of 100 to 1,000 kg/cm.sup.2 and an elastic recovery at 50% elongation of not less than 70%, PA1 said polyamide segment (A) having been obtained from: PA1 a C.sub.6 -C.sub.20 aliphatic diamine (A-1); and PA1 at least one dicarboxylic acid (A-2) selected from the group consisting of C.sub.6 -C.sub.15 aliphatic dicarboxylic acids, terephthalic acid and hexahydroterephthalic acid, provided the total number of carbon atoms of said diamine and said dicarboxylic acid is not less than 16, PA1 said polyether ester segment (B) having been obtained from: PA1 a poly(alkylene oxide) glycol (B-1) having a ratio of carbon atom number to oxygen atom number of not smaller than 2.3 and having a number average molecular weight in the range of 300 to 5,000; and PA1 a C.sub.4 -C.sub.20 dicarboxylic acid (B-2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.