Anionic polymerization process

Details Anionic polymerization process Anionic polymerization process

C - Chemistry, Metallurgy

08

F

C08F 12/04 (2006.01)

Patent

CA 2488815

A batch process for the anionic polymerization of a styrenic monomer is described. The process brings together a liquid saturated hydrocarbon diluent, an ether promoter, an organolithium initiator and a styrenic monomer in such a way so as to maintain the reaction mixture at or below 55~ C and so that the amount of organolithium initiator employed is in the range of 1 to 10 mol%, based upon the total amount of styrenic monomer to be added. Favorable polydispersity and molecular weight polymer characteristics are obtained.

La présente invention concerne un processus par lots utilisé pour effectuer la polymérisation anionique d'un monomère de styrène. Le processus consiste à mélanger un diluant hydrocarbure saturé liquide, un promoteur éther, un initiateur organolithium et un monomère de styrène de manière à maintenir le mélange de réaction à une température inférieure ou égale à 55 ·C et de manière à ce que la quantité d'initiateur organolithium employée se situe dans les limites 1-10 mol %, sur la base de la quantité totale du monomère de styrène devant être ajoutée. On obtient ainsi un polymère ayant des caractéristiques favorables de polydispersité et de poids moléculaire.

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