C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 279/02 (2006.01) C08F 285/00 (2006.01) C08F 291/00 (2006.01)
Patent
CA 2561908
A process for the preparation of vinylaromatic (co)polymers grafted on an elastomer in a controlled way, comprising the dissolving of an elastomer, such as polibutadiene, in a mixture consisting of a monomer and of a solvent in the presence of a polymerization catalytic system, which comprises an initiator of free radicals and a stable initiator of free radicals. The mixture obtained in this way is heated to a temperature of about 100 ~C to functionalize the rubber, then more monomer is added and the temperature is raised to start the polymerization reaction.
L'invention concerne un procédé destiné à la préparation de (co)polymères vinylaromatiques greffés sur un élastomère de façon contrôlée. Ce procédé consiste à dissoudre un élastomère, tel que du polybutadiène, dans un mélange renfermant un monomère et un solvant en présence d'un système catalytique de polymérisation comprenant un amorceur de radicaux libres et un amorceur stable de radicaux libres. Le mélange ainsi obtenu est chauffé à une température d'environ 100 ·C pour fonctionnaliser le caoutchouc, puis un monomère supplémentaire est ajouté et la température est augmentée pour déclencher la réaction de polymérisation.
Chiezzi Leonardo
Longo Aldo
Polimeri Europa S.p.a.
Robic
LandOfFree
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