Partially aromatic polyamides having improved thermal stability
AssigneeBP Amoco Corporation
InventorRobert G. Keske
Life of this patent
Estimating the term…
Abstract
Improved high temperature polyamides, and particularly partially-aromatic polyamides, containing less than about 40 .mu.eq/g carboxylic acid endgroups. When stabilized with a copper-containing thermal stabilizer, the polyamides exhibit improved thermal oxidative stability.
Claims20
A partially aromatic polyamide having from about 0 to about 30 .mu.eq/g carboxylic acid endgroups.
A partially aromatic polyamide having from about 0 to about 30 .mu.eq/g carboxylic acid endgroups, said polyamide comprising aliphatic diamine terephthalamide units represented by the following structural formula:
- ##STR4## wherein R comprises at least one C.sub.4 -C.sub.14 aliphatic hydrocarbyl radical.
A composition comprising (a) a partially aromatic polyamide having from about 0 to about 30 .mu.eq/g carboxylic acid endgroups, said polyamide comprising units represented by the following structural formulas:
- ##STR6## wherein R comprises at least one C.sub.4 -C.sub.14 aliphatic hydrocarbyl radical and wherein the mole ratio of the units A, B and C lies in the range of from about 40-100:30-0:60-0;
- and
- (b) from about 5 to about 60 wt % glass fiber.
Dependencies are inferred from the claim text.