Curable thermosetting prepolymerised imide resin compositions

Details Curable thermosetting prepolymerised imide resin compositions Curable thermosetting prepolymerised imide resin compositions

1990-04-17

1992-10-06

Carrillo, Ana L.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525181, 525184, 525426, 526262, C08L 7908, C08F 2240

Patent

active

051532743

ABSTRACT:
Curable thermosetting prepolymerized imide resin compositions are prepared by chemically reacting, at a temperature below 150.degree. C., a liquid mixture of carboxy-terminated polybutadiene/acrylonitrile (CTBN) and a co-reactant comprising at least one N,N'-bisimide of an unsaturated carboxylic acid of formula (I) where B represents a divalent radical containing a carbon-carbon double bond and A represents a divalent radical having at least two carbon atoms to yield a curable thermosetting prepolymerized imide resin composition containing copolymerized CTBN and co-reactant. A resin composition prepared by this method may be cured at a temperature between 100.degree. C. and 350.degree. C. to yield a fully cross-linked polyimide matrix containing a dispersion of phase-separated solid particles of copolymerized CTBN and co-reactant, the matrix having a lapshear strength at 20.degree. C. at least 50% greater than that of a fully cross-linked polyimide cured from the co-reactant alone.

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