| 摘要 |
The invention relates to the N-substituted acyl-lactam compound of the formula: <IMAGE> where R' is a bivalent cyclic or non-cyclic alkyl, aralkyl, alkaryl or aryl radical R'' a bivalent radical having the following general formula <IMAGE> wherein R''' is H, alkyl, cycloalkyl, aryl, alkaryl or aralkyl, Riv is H, alkyl, cycloalkyl, aryl, alkaryl or aralkyl where R''' and Riv may jointly form a substituted or non-substituted cycloalkyl residue n is 0 or 1 (-L) represents a non-opened lactam ring and x a number>1. It has been found that this group of compounds is very suitable as activator in the preparation of nylon polymers, more specifically in the so-called RIM (Reaction Injection Moulding) or RRIM (reinforced RIM) systems, in which it is highly essential for the polymerization to take effect within a very short time. |
