METHOD FOR PRODUCING VINYLAROMATIC (CO) Russian patent published in 2009 - IPC C08F279/02 C08F291/02 

FIELD: chemistry.

SUBSTANCE: invention refers to method for producing vinylaromatic (co)polymers grafted on elastomer by controlled way. There is method for producing vinylaromatic (co)polymers grafted on elastomer by controlled way, involving as follows: a) elastomer is dissolved in liquid phase consisting of mixed vinylaromatic monomer and polymerisation solvent in ratio within 60/40 to 100/0; b) the solution is added with catalyst polymerisation system consisting of free-radical initiator (G) of functionality F, removing proton from polymer elastomeric chain, and stable free radical initiator including group =N-O (I) at molar ratios I/GF lower than 4; c) the stirred mixture resulted from the stage (b) at temperature 80 to 110°C, during time required to enable the complete functionalisation of elastomer; d) vinylaromatic monomer is delivered to the mixture containing dissolved functionalised elastomer, while prepared mixture is polymerised at temperature 120°C and higher, preferentially within 120 to 200°C; e) vinylaromatic polymer resulted from polymerisation is separated and degassed in vacuum environment to remove the solvent and unreacted monomer; and f) mixed solvent/monomer are recycled to the stage (a).

EFFECT: ensured production of morphological variety of end-product.

8 cl, 1 tbl, 4 ex