Curable compositions based on imide group-containing compounds

Claim 1

A curable composition which comprises the following three ingredients: A. an imide-group containing compound which is either: a. a bis-imide of the formula: ##STR13##in which D represents a divalent radical of the formula: ##STR14## wherein Y represents H, CH 3 or Cl and m is 0 or 1, and A represents a divalent organic radical containing 2 to 30 carbon atoms, or b. a mixture of a bis-imide of formula (I) and a mono-imide of the formula: ##STR15##in which D is as defined above and R represents a hydrogen atom or a monovalent organic radical containing 1 to 20 carbon atoms B. an amino compound which is either: a. one or more polyamines containing 2 to 5 primary or secondary amino groups, at least one of which is primary, or b. a mixture comprising one or more polyamines as defined under a) and one or more primary and/or secondary mono-amines and/or one or more secondary polyamines, and C. a polyurethane elastomer formed by reacting excess of a diisocyanate with a hydroxylic polymer and then reacting the macrodiisocyanate obtained with a coupling agent, the amounts of (A), (B) and (C) being such that: the weight ratio ##EQU4##is from 1/25 to 5/1, and the ratio ##EQU5##is from 0.6/1 to 50/1.