| abstract |
The invention is a new method of production of grafted copolymers of isobutylene by block polymerisation, based on the fact that the block polymerisation is carried out at -60 to -100 degrees C in the presence of an initiator system, which consists of a component formed by a macromolecular substance containing chorine atoms in the chain bound to secondary and/or tertiary carbons, possibly activated by adjacency of the double bind, the second component is Lewis acid boron chloride, whereas the molar ratio of boron chloride to isobutylene is 50 to 10<-5> with the occurrence of products containing a chemically linked initiator component, corresponding to the used macromolecular substance.<IMAGE> |