ピリジル鉄錯体を含む触媒系の存在下にて、主に交互シス－１，４－ＡＬＴ－３，４構造を有するポリイソプレンの製造方法

Japanese Patent JP7317840

B2

Process for the preparation of polyisoprene with a mainly alternating cis-1,4-alt-3,4 structure comprising polymerizing isoprene in the presence of a catalytic system comprising:(a) at least one pyridyl iron complex having general formula (I):wherein:R1 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups;R2 is selected from linear or branched C1-C10, preferably C1-C3, alkyl groups; X, mutually identical or different, 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, —OCOR3 groups or —OR3 groups wherein R3 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups.n is 2 or 3;(b) at least one co-catalyst selected from organo-derivative compounds of aluminum, preferably from(b1) aluminoxanes having general formula (II):(R4)2—Al—O—[—Al(R5)—O—]m—Al—(R6)2  (II)wherein R4, R5 and R6, mutually identical or different, represent a hydrogen atom, or a halogen atom such as, for example, chlorine, bromine, iodine, fluorine; or they are selected from linear or branched C1-C20 alkyl groups, cycloalkyl groups, aryl groups, said groups being optionally substituted with one or more silicon or germanium atoms; and m is an integer ranging from 0 to 1000;(b2) aluminum compounds having general formula (III):Al(R7)(R8)(R9)  (III)wherein R7 is a hydrogen atom, or is selected from linear or branched C1-C20 alkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, arylalkyl groups, alkoxy groups; R8 and R9, mutually identical or different, are selected from linear or branched C1-C20 alkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, arylalkyl groups;wherein the molar ratio between the aluminum present in the co-catalyst and the iron present in the iron pyridyl complex having general formula (I) is ranging from 5 to 60, preferably from 8 to 55.

WO/1995/015346

LOW VISCOSITY TERMINALLY FUNCTIONALIZED ISOPRENE POLYMERS

Rich Giovanni
Sommazzi Anna
Pampaloni Guido
Leone Giuseppe
Marge Francesco

JP2020539050A

July 31, 2023

January 16, 2019

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Bersalis Esse P.A.

C08F136/08; C08F4/70

JP4266908A

WO2004020413A1
US20140011971
CN106632764A
WO2018073795A1
CN105085380A

Saegusa International Patent Office

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