Crystalline polyamide composition from dicarboxylic acid mixture and diamine
USRE34447E · kind E · reissue
19Cited by
5References
27Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 21, 1988 |
| Grant date | Nov 16, 1993 |
| Priority date | — |
| Expiry date | Jul 21, 2008 |
Classification
- Technology area (CPC —)General
Abstract
Novel crystalline polyamides having high heat deflection temperatures when filled are prepared from aliphatic diamines and either mixtures of terephthalic acid and adipic acid or mixtures of terephthalic acid, isophthalic acid and adipic acid. The mole ratio of aliphatic diamine to terephthalic acid, isophthalic acid, and adipic acid is in the range of about 100:65-95:25-0:35-5. The polyamides can be filled with about 10 to about 60 parts by weight of a filler. The mechanical properties of these polyamides are largely unaffected by absorbed water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.