Polyimides containing carbonyl and ether connecting groups

Details Polyimides containing carbonyl and ether connecting groups Polyimides containing carbonyl and ether connecting groups

1987-02-05

1989-04-11

Kight, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528128, 528172, 528185, 528353, C08G 802, C08G 1400

Patent

active

048207918

ABSTRACT:
New polyimides have been prepared from the reaction of aromatic dianhydrides with novel aromatic diamines containing carbonyl and ether connecting groups between the aromatic rings. Several of these polyimides were shown to be semi-crystalline as evidenced by wide angle x-ray diffraction and differential scanning calorimetry. Most of the semi-crystalline polyimides form tough solvent resistant films with high tensile properties. One of these materials exhibits very high fracture toughness and can be thermally processed.

REFERENCES:
patent: 3502762 (1970-03-01), Heller
patent: 3835120 (1974-09-01), Bach et al.
patent: 4299750 (1981-11-01), Antonoplos et al.
patent: 4316844 (1982-02-01), Waitkus et al.
patent: 4405770 (1983-09-01), Schoenberg et al.
patent: 4525171 (1985-05-01), Bakshi et al.

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