C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 2/38 (2006.01) C08F 4/00 (2006.01) C08F 293/00 (2006.01)
Patent
CA 2423194
The present invention relates to a composition and process for enhancing the controlled radical polymerization in the presence of nitroxyls and nitroxylethers by adding a chain transfer agent selected from the group consisting of mercaptanes, thioethers and disulfides to the polymerizable mixture. A further subject of the invention is the use of mercaptanes, thioethers and disulfides for increasing rate and yield of controlled radical polymerizations in the presence of a nitroxyl or a nitroxylether.
Cette invention se rapporte à une composition et à un procédé servant à améliorer la polymérisation contrôlée de radicaux en présence de nitroxyles et de nitroxyléthers, en ajoutant au mélange polymérisable un agent de transfert de chaîne, choisi dans le groupe des mercaptanes, des thioéthers et des disulfures. Cette invention concerne également l'utilisation de mercaptanes, de thioéthers et de disulfures pour accroître la vitesse et le rendement de polymérisations contrôlées de radicaux en présence d'un nitroxyle ou d'un nitroxyléther.
Pfaendner Rudolf
Wunderlich Wiebke
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
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