| 摘要 |
A mouldable composition is provided which comprises (a) a prepolymer having a softening point from 50 DEG to 220 DEG C. produced from an N,N'-bis-imide of the general formula: COCO D ANGLE ANGLE N-A-N ANGLE ANGLE D COCO in which D represents a divalent organic radical containing an olefinic carbon-carbon double bond and A represents a divalent radical possessing 2 to 30 carbon atoms, and a polyamine of the general formula: R(NH2)x IN WHICH X IS AN INTEGER AT LEAST EQUAL TO 2 AND R represents an organic radical of valency x, 0.55 to 25 mols of bis-imide being used per molar -NH2 group provided by the polyamine, (b) filler, and (c) based on the weight of the prepolymer, 0.1 to 10% by weight of a radical-type initiator and 0.05 to 10% by weight of an organopolysiloxane oil or of a mixture comprising an oil and an organopolysiloxane resin. Such compositions can be moulded by heating to give articles which come away easily from the mould. The compositions also possess the advantage that the moulding temperatures need not be as high as those which are customary for polyimide compositions and the moulding takes place quickly.
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