Amorphous polyimide powder, preparation process of the powder, a

Details Amorphous polyimide powder, preparation process of the powder, a Amorphous polyimide powder, preparation process of the powder, a

1992-06-05

1994-12-06

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528126, 528128, 528172, 528173, 528176, 528183, 528188, 528220, 528229, 528350, 528351, 528353, 526935, C08G 802, C08G 6926, C08G 7310

Patent

active

053711688

ABSTRACT:
Amorphous polyimide powder which has recurring structural units of the formula (I): ##STR1## as a fundamental skeleton, is blocked at the polymer chain end with dicarboxylic anhydride represented by the formula (II) ##STR2## wherein Z is a divalent radical having from 6 to 27 carbon atoms and selected from the group consisting of a monoaromatic radical, condensed polyaromatic radical and noncondensed aromatic radical connected to each other with a direct bond or a bridge member, and essentially has no reactive radical at the polymer chain end, preparation process of the amorphous polyimide powder, heat-resistant adhesive comprising the polyimide, and bonding method using the adhesive.

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