Thermally adaptive polymers and prepolymers and methods of makin

Details Thermally adaptive polymers and prepolymers and methods of makin Thermally adaptive polymers and prepolymers and methods of makin

1985-08-27

1987-08-18

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521157, 528 51, 528 73, C08G 1814

Patent

active

046877851

ABSTRACT:
Reaction of an aromatic dianhydride with a polycyclic aromatic primary diamine at a controlled reaction rate yields a diamic acid dianhydride oligomer. The oligomer may be a precursor for an imide foam which forms at low temperature, has outstanding physical characteristics, and is extremely heat resistant. The diamic acid moiety may be converted to diimide, and other modifications of the oligomer are disclosed. Other derivatives of the oligomers are also disclosed.

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