发明授权
US4611052A Process for the preparation of a nylon block copolymer with mixture of high molecular weight activator reactant and low molecular weight activator reactant 失效
制备具有高分子量活化剂反应物和低分子量活化剂反应物的混合物的尼龙嵌段共聚物的方法

Process for the preparation of a nylon block copolymer with mixture of
high molecular weight activator reactant and low molecular weight
activator reactant
摘要:
The invention relates to a process for the preparation of a nylon block copolymer composition by polymerization of lactam in the presence of a lactam-polymerization catalyst and an activator, characterized in that the activator used is a combination of:1. a high molecular weight lactam-terminated activator with a molecular weight of at least 1500, and2. a low molecular weight lactam-terminated activator with a molecular weight of at most 750.The process according to the invention can, in particular, be used in a reaction injection moulding process, in which liquid reaction component are introduced into a mould where fast polymerization to a moulded object takes place.
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