Semi-crystalline, semi-aromatic copolymers with superior post-mo

Details Semi-crystalline, semi-aromatic copolymers with superior post-mo Semi-crystalline, semi-aromatic copolymers with superior post-mo

1997-07-17

2000-10-31

Hampton-Hightower, P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528332, 528335, 528336, 528338, 528339, 528340, 524600, 524606, 524607, 524118, 524409, C08L 7700, C08G 6926

Patent

active

061404594

ABSTRACT:
This invention relates to high temperature, semi-crystalline, semi-aromatic nylon copolymers with improved shrinkage and blistering resistance, made from terephthalic acid (TA), hexamethylene diamine (HMD) and another aliphatic dicarboxylic acid as monomers. These polymers display superior % TD (Transverse Direction) annealing shrinkage, superior resistance to blistering when formulated with flame retardant additives and reinforcement under infrared (IR) reflow soldering conditions for electronic conectors, as well as a very good balance of mechanical performance as high temperature nylons.

REFERENCES:
patent: Re34447 (1993-11-01), Poppe et al.
patent: 5324766 (1994-06-01), Ikejiri et al.
patent: 5504146 (1996-04-01), Goetz et al.
patent: 5750639 (1998-05-01), Hayashi
patent: 5849826 (1998-12-01), Ogo et al.
patent: 5856428 (1999-01-01), Hayashi et al.

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