C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 20/10 (2006.01) C08F 20/12 (2006.01) C08F 20/14 (2006.01) C08F 297/02 (2006.01)
Patent
CA 2054757
The initiating system for the anionic polymerisation of acrylic monomers, and where necessary, vinyl comonomers, including at least one R-M initiator in which M = a metal chosen from among the alkaline and alcaline earth metals and R = an alkyl with a linear or branched chain at C2-C6 or aryl or arylalkyl, is characterised by the fact that the polymerisation takes place in the presence also of at least one R1OM1 alkaline metal alcoholate, in which R = an alkyl with a linear or branched chain at C1-C6 or aryl or aryalkyl and M1 = an alkaline metal, on condition that when M1 is lithium, then R = an aryl or arylalkyl. Said process for the polymerisation of primary, secondary, or tertiary alkyl acrylates, and possibly of vinyl comonomers, is characterised by the fact that the polymerisation takes place in the presence of an initiating system as described above.
Ce système d'amorçage de la polymérisation anionique de monomères acryliques et le cas échéant de comonomères vinyliques, comprenant au moins un amorceur R-M dans laquelle M = métal choisi parmi les métaux alcalins et alcalino-terreux et R = alkyle à chaîne droite ou ramifiée en C2-C6 ou aryle ou arylalkyle, est caractérisé en ce que la polymérisation est effectuée en présence en outre d'au moins un alcoolate de métal alcalin R1OM1, dans laquelle R1 = alkyle à chaîne droite ou ramifiée en C1-C6 ou aryle ou arylalkyle et M1 = métal alcalin, avec la condition que lorsque M1 est le lithium, alors R = aryle ou arylalkyle. Le procédé de polymérisation d'acrylates d'alkyle primaire, secondaire ou tertiaire ou de monomères méthacryliques, et éventuellement de comonomères vinyliques, est caractérisé en ce que la polymérisation est effectuée en présence d'un système d'amorçage tel que défini ci-dessus.
Fayt Roger
Teyssie Philippe
Varshney Sunil K.
Atochem
Elf Atochem S.a.
Robic
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