Process of forming a conjugated diene (co) polymer in the presence of a catalytic system containing a cobalt bisimine complex

Japanese Patent JP6348911

B2

Process for the preparation of (co) polymers of conjugated dienes which comprises polymerizing at least one conjugated diene in the presence of a catalytic system comprising at least one bisimine complex of cobalt having general formula (I) wherein: —n is 0 or 1; —Y represents a group —CR′R″— wherein R′ and R″, equal to or different from each other, represent a hydrogen atom; or a linear or branched C1-C20, preferably C1-C15, alkyl group; or a divalent aromatic group optionally substituted; —R1 and R2, equal to or different from each other, represent a hydrogen atom; or they are selected from a linear or branched Ci-C2o/preferably C1-C15, alkyl group optionally halogenated, cycloalkyl groups optionally substituted; or R1 and R2 can be optionally bound to each other to form, together with the other atoms to which they are bound, a cycle containing from 4 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally substituted with linear or branched C1-C20, preferably C1-C15, alkyl groups, said cycle optionally containing heteroatoms such as, for example, oxygen, sulfur, nitrogen, silicon, phosphorous, selenium; R3 and R4, equal to or different from each other, represent a hydrogen atom; or they are selected from a linear or branched Ci-C20, preferably C1-C15, alkyl groups optionally halogenated, cycloalkyl groups optionally substituted, aryl groups optionally substituted; or R2 and R4 can be optionally bound to each other to form, together with the other atoms to which they are bound, a cycle containing from 3 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally substituted with linear or branched Ci-C2o, preferably C1-C15 alkyl groups, said cycle optionally containing other heteroatoms such as, for example, oxygen, sulfur, nitrogen, silicon, phosphorous, selenium; or R1 and R3 can be optionally bound to each other to form, together with the other atoms to which they are bound, a cycle containing from 3 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally substituted with linear or branched C1-C20, preferably C1-C15, alkyl groups, said cycle optionally containing other heteroatoms such as, for example, oxygen, sulfur, nitrogen, silicon, phosphorous, selenium; X1 and X2, equal to or different from each other, represent a halogen atom such as, for example, chlorine, bromine, iodine; or they are selected from linear or branched C1-C20 preferably C1-C15, alkyl groups, —OCOR5 groups or —OR3 groups wherein R5 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups.

Giovanni Rich
Anna Somazzi
Giuseppe Leone
Francesco Marge
Aldo Boglia

JP2015548850A

June 27, 2018

December 19, 2013

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VERSALIS S.P.A.

C08F36/04; C08F4/70

JP10298225A
JP2009518291A

WO2011086580A1

KIM BU UNG et.al.,Highly cis-selectivity and low molecular weight distribution polymerization of 1,3-butadiene with cobalt(II)pyridyl bis(imine) complexes in the presence of ethylaluminium sesquischloride: effect of methyl position in the ligand,STUDIES IN SURFACE SCIENCE AND CATALYSIS,ELSEVIER B V,2006年,Vol.159,Pages 873-876

Kenji Sugimura
Koichiro God
Takao Inoue

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