Publication number: 20190270832
Abstract: A process for preparing conjugated diene (co)polymers comprising polymerizing at least one conjugated diene in the presence of a catalytic system comprising: (a) at least one pyridyl iron (III) complex having general formula (I) or (II): wherein: —R1, R2, R3 and R4, identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; —R5 represents a hydrogen atom, or is selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; —X, identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine; or are selected from linear or branched C1-C20, preferably C1-C15, alkyl groups, —OCOR6 groups or —OR6 groups wherein R6 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups.
Type:
Application
Filed:
October 20, 2017
Publication date:
September 5, 2019
Applicant:
Versalis S.p.A.
Inventors:
Giovanni RICCI, Guido PAMPALONI, Anna SOMMAZZI, Massimo GUELFI, Francesco MASI
Publication number: 20190194233
Abstract: Vanadium phosphinic complex having general formula (I) or (II): V(X)3[P(R1)n(R2)3-n]2??(I) V(X)3[(R3)2P(R4)P(R3)2]??(II) wherein: X represents an anion selected from halogens such as, for example, chlorine, bromine, iodine, preferably chlorine; or is selected from the following groups: thiocyanate, isocyanate, sulfate, acid sulfate, phosphate, acid phosphate, carboxylate, dicarboxylate; R1, identical or different among them, represent a hydrogen atom, or an allyl group (CH2?CH—CH2—); or are selected from alkyl groups C1-C20, preferably C1-C15, linear or branched, optionally halogenated, optionally substituted cycloalkyl groups; n is an integer ranging from 0 to 3; R2, identical or different among them, are selected from optionally substituted aryl groups; R3, identical or different among them, represent a hydrogen atom, or an allyl group (CH2?CH—CH2—); or are selected from alkyl groups C1-C20, preferably C1-C15, linear or branched, optionally halogenated, optionally substituted cycloalkyl groups, opti
Type:
Application
Filed:
January 9, 2019
Publication date:
June 27, 2019
Inventors:
Giovanni RICCI, Giuseppe LEONE, Anna SOMMAZZI, Alessandra FORNI, Francesco MASI
Patent number: 10301408
Abstract: An oxo-nitrogenated vanadium complex having the general formula (I): in which: —R1, R2, R3, R4, R5, R6 and R7, mutually identical or different, represent a hydrogen atom; or are selected from optionally halogenated, linear or branched C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; —X1 and X2, mutually identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine, preferably chlorine; or are selected from linear or branched C1-C20, preferably C1-C15, alkyl groups, —OCOR8 groups or —OR8 groups in which R8 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups; —Y is selected from ethers such as, for example, diethyl ether, tetrahydrofuran (THF), dimethoxyethane, preferably is tetrahydrofuran (THF); —n is 0 or 1. Said oxo-nitrogenated vanadium complex having the general formula (I) may advantageously be used in a catalytic system for (co)polymerizing conjugated dienes.
Type:
Grant
Filed:
December 23, 2015
Date of Patent:
May 28, 2019
Assignee:
Versalis S.p.A.
Inventors:
Guido Pampaloni, Giovanni Ricci, Anna Sommazzi, Francesco Masi, Giuseppe Leone
Publication number: 20170349682
Abstract: An oxo-nitrogenated vanadium complex having the general formula (I): in which: R1, R2, R3, R4, R5, R6 and R7, mutually identical or different, represent a hydrogen atom; or are selected from optionally halogenated, linear or branched C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; X1 and X2, mutually identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine, preferably chlorine; or are selected from linear or branched C1-C20, preferably C1-C15, alkyl groups, —OCOR8 groups or —OR8 groups in which R8 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups; Y is selected from ethers such as, for example, diethyl ether, tetrahydrofuran (THF), dimethoxyethane, preferably is tetrahydrofuran (THF); n is 0 or 1. Said oxo-nitrogenated vanadium complex having the general formula (I) may advantageously be used in a catalytic system for (co)polymerising conjugated dienes.
Type:
Application
Filed:
December 23, 2015
Publication date:
December 7, 2017
Inventors:
Guido PAMPALONI, Giovanni RICCI, Anna SOMMAZZI, Francesco MASI, Giuseppe LEONE
Publication number: 20170275312
Abstract: Vanadium phosphinic complex having general formula (I) or (II): V(X)M3P?WFys-nMO V(X)3[(R3)2P(R4)P(R3)2] (ID wherein: X represents an anion selected from halogens such as, for example, chlorine, bromine, iodine, preferably chlorine; or is selected from the following groups: thiocyanate, isocyanate, sulfate, acid sulfate, phosphate, acid phosphate, carboxylate, dicarboxylate; Ri, identical or different among them, represent a hydrogen atom, or an allyl group (CH2=CH—CH2-); or are selected from alkyl groups CrC2o, preferably CrC?, linear or branched, optionally halogenated, optionally substituted cycloalkyl groups; —n is an integer ranging from 0 to 3; R2, identical or different among them, are selected from optionally substituted aryl groups; R3, identical or different among them, represent a hydrogen atom, or an allyl group (CH2=CH—CH2-); or are selected from alkyl groups C1-C2o, preferably CrC?, linear or branched, optionally halogenated, optionally substituted cycloalkyl groups, optionally substituted aryl
Type:
Application
Filed:
November 24, 2015
Publication date:
September 28, 2017
Inventors:
Giovanni RICCI, Giuseppe LEONE, Anna SOMMAZZI, Alessandra FORNI, Francesco MASI