PROCESS FOR THE PREPARATION OF A TRIBLOC COPOLYMER COMPRISING A SEMI-CRYSTALLINE AND / OR HYDROLYSABLE BLOCK, AN ELASTOMERIC BLOCK AND AN AMORPHOUS BLOCK

摘要

The invention relates to a process for preparing a block copolymer comprising a sequence successively comprising a semi-crystalline and / or hydrolysable block, an elastomer block and an amorphous block, comprising the following steps: a) an addition step 1,2 on an ethylenic terminal group of a semi-crystalline and / or hydrolysable polymer of an alkoxyamine which can satisfy the following formula (II): b) an addition step to the medium resulting from step a) d one or more precursor monomers of the elastomer block, whereby a semi-crystalline block-b-elastomeric block diblock copolymer is obtained, c) an addition step to the medium resulting from step b) of one or more precursor monomers of the amorphous block, whereby the semi-crystalline and / or hydrolysable block-triblock copolymer-b-elastomeric-b-block amorphous block is obtained.Application of the copolymers obtained as an amorphous matrix impact modifier.