Polyamide from toluenediamine

Details Polyamide from toluenediamine Polyamide from toluenediamine

1990-05-25

1991-05-14

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

4284744, 524606, 524607, 528338, 528339, 528340, 528347, C08G 6932

Patent

active

050157264

ABSTRACT:
An amorphous polyamide having a high heat distortion temperature is produced by reacting toluenediamine with isophthalic acid, and optionally terephthalic acid, in the presence of either an aliphatic diacid, an aliphatic diamine or a mixture thereof. The polyamide provides the combined properties of a high heat distortion temperature, low shrinkage upon cooling, high levels of chemical resistance, is processable at temperatures below its degradation temperature, and has a high flexural modulus. With these combined properties the polyamide is particularly suitable for fiber reinforced automotive applications requiring exposure to excessive heat in conventional automotive paint bake ovens.

REFERENCES:
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patent: 4501879 (1985-02-01), Barbee et al.
patent: 4539393 (1985-09-01), Tamura et al.
patent: 4567249 (1986-01-01), Fox et al.
patent: 4721772 (1988-01-01), Ueno et al.
patent: 4864009 (1989-09-01), Finke et al.
patent: 4885356 (1989-12-01), Milligan et al.
L. H. Gan, P. Blais, D. J. Carlsson, T. Suprunchuk and D. M. Wiles, Journal of Applied Polymer Science, 19; 69 (1975).

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