Crystallized semiaromatic polyamides having high Tg and Tm less than 290 degree C. from hindered aromatic diamine and branched chain aliphatic diamine
US4937322A · kind A · utility
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6References
5Claims
0Family size
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Key dates
| Filing date | Jun 15, 1989 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Jun 15, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L77/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Crystallized semiaromatic copolyamides having glass transition temperatures, Tg, greater than 142.degree. C., melting points, Tm, less than 290.degree. C. and improved thermomechanical properties, well adopted for the production of a wide variety of useful shaped articles, contain specified amounts of terephthalic acid, 2-methylpentamethylenediamine and hindered aromatic diamine recurring structural units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.