Process for the preparation of random copolymers of mono-olefins or of mono-olefins and unconjugated dienes with lactams with substitution on the nitrogen atom by an unsaturated radical

摘要

A process is described for the preparation of substantially linear, amorphous random copolymers of mono-olefins or mono-olefins and unconjugated dienes with N-unsaturated lactams.PPAt least two mono-olefins containing 2 to 20 carbon atoms, and possibly an unconjugated diene, are placed in contact, in an inert liquid medium at a temperature of between -80° and +150°C, with at least one such N- unsaturated lactam in the form of a complex with a Lewis acid, in the presence of a co-ordination catalyst system, until a copolymer forms. PPThe resulting copolymers can be vulcanized, and among other properties have improved adherence to metal surfaces.