| abstract |
ABSTRACT OF THE DISCLOSURE The invention concerns N-substituted carbamoyl-lactam compounds of the formula where: - R is a polyol radical from a polyol having the formula R-(-OH)xi, where Xi is an integer ? 2, - R' is an alkyl, whether or not cyclic, aralkyl, alkaryl or aryl group, .gamma.i is an integer > O, - (-L) is an unopened lactam ring and - (-L-) is an opened lactam block. These compounds are useful in the preparation of highly impact resistant nylon block copolymers. |