Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1988-09-26
1990-02-06
Terapane, John F.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528183, C08G 7310
Patent
active
H00007293
ABSTRACT:
There are provided polyisoimides having repeating units of the formula ##STR1## wherein R is selected from the group consisting of ##STR2## wherein Me is --CH.sub.3 and wherein X is ##STR3## The polyisoimides of the present invention are soluble in a variety of solvents, including DMAC, THF and the like.
The polyisoimides of the present invention are used to produce cured resins having high strength and temperature characteristics as well as low void contents. Curing is effected by heating the polyisoimides at temperatures ranging from about 200.degree. C. to about 370.degree. C.
REFERENCES:
patent: 4438273 (1984-03-01), Landis
patent: 4485231 (1984-11-01), Landis
patent: 4495342 (1985-01-01), Landis
patent: 4496711 (1985-01-01), Landis
patent: 4654223 (1987-03-01), Araps et al.
Arnold Fred E.
Wallace J. Shield
Bricker Charles E.
Sayala Chhaya
Singer Donald J.
Terapane John F.
The United States of America as represented by the Secretary of
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