C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 4/12 (2006.01) C08F 36/04 (2006.01) C08F 36/06 (2006.01)
Patent
CA 2247669
The invention provides a catalyst composition, comprising: (a) an organolithium compound; and, (b) an organic acid salt of lanthanide series element; wherein: (1) only components (a) and (b) are required to promote the synthesis of 1,4-trans-polybutadiene; (2) the ratio of component (a) to component (b) is selected to maximize formation of the trans structure of said 1,4-trans-polybutadiene; and, (3) components (a) and (b) are selected for enabling further diblock synthesis. The invention further contemplates a process for using the catalyst to synthesize 1,4-trans-polybutadiene and other polymers and copolymers having trans configuration in the conjugated diene monomer contributed units.
Cette invention concerne une composition de catalyseur comprenant : a) un composé organolithinifère; et b) un sel d'un élément de la série des lanthanides d'acide organique. Dans cette composition : 1) seuls les composants a) et b) doivent favoriser la synthèse de polybutadiène 1,4-trans; 2) le rapport des quantités de a) et de b) est choisi de manière à obtenir un maximum de structures trans dans ce polybutadiène 1,4-trans; et 3) les composés a) et b) sont choisis de manière à permettre la synthèse ultérieure d'un composé biséquencé. Cette invention concerne, de plus, un procédé d'utilisation de ce catalyseur pour synthétiser du polybutadiène 1,4-trans et d'autres polymères et copolymères ayant des motifs monomères diéniques conjugués de configuration trans.
Bridgestone Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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