Copolymers prepared by using both anionic polymerization...

C - Chemistry – Metallurgy – 08 – F

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C08F 295/00 (2006.01) C08F 4/12 (2006.01) C08F 293/00 (2006.01) C08F 297/02 (2006.01) C08F 297/06 (2006.01) C08K 5/00 (2006.01) C08L 51/04 (2006.01) C08L 53/00 (2006.01)

Patent

CA 2396053

A process for forming a copolymer comprising the steps of (i) preparing a living polymer segment by using anionic polymerization techniques, (ii) modifying the living polymer by reacting it with an alkyl metal halide to form an organometallic polymeric intermediate, and (iii) preparing a second polymer segment from the organometallic polymeric intermediate by combining the intermediate, conjugated diene monomer, and a coordination catalyst that will polymerize the conjugated diene monomer.

L'invention se rapporte à un procédé de préparation d'un copolymère consistant (i) à préparer un segment de polymère vivant en mettant en oeuvre des techniques de polymérisation anionique, (ii) à modifier le polymère vivant en le faisant réagir avec un halogénure métallique d'alkyle de manière à former un intermédiaire polymère organométallique, et (iii) à préparer un second segment polymère à partir de l'intermédiaire polymère organométallique en combinant le monomère diénique conjugué, intermédiaire, avec un catalyseur de coordination qui polymérise le monomère diénique conjugué.

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