Polymers prepared from 2-(3-aminophenyl)-2-(4-aminophenyl) hexaf

Details Polymers prepared from 2-(3-aminophenyl)-2-(4-aminophenyl) hexaf Polymers prepared from 2-(3-aminophenyl)-2-(4-aminophenyl) hexaf

1988-09-30

1990-12-18

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528176, 528188, 528229, C08G 1200, C08G 6300, C08G 6926

Patent

active

049787420

ABSTRACT:
Polyimides and polyamide-acids having improved solubility and processing characterisitcs are provided having incorporated into the polymeric chain as a novel aromatic diamine compound, 2-(3-aminophenyl)-2-(4-aminophenyl) hexafluoropropane (3,4'-6F Diamine). The polyamide-acids and polyimides are prepared by reacting the 3,4'-6F Diamine with aromatic tetracarboxylic acids or anhydrides thereof. It has been found that the polyimides of this invention have improved solubility characterisitics, low dielectric constants and improved thermal flow properties as a consequence of the meta/para positioning of the amino groups on the diamine, which renders these polymers more readily melt spinnable for the production of fibers. The polymers may also be compression molded and fabricated into composites at moderate temperatures and pressures. Solutions of the polyimides may be cast into films.

REFERENCES:
patent: 3328352 (1967-06-01), Kwolek
patent: 3356648 (1967-12-01), Rogers
patent: 3792148 (1974-02-01), Reske
patent: 4075172 (1978-02-01), Ozawa
patent: 4111906 (1978-09-01), Jones
patent: 4592925 (1986-06-01), DuPont

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