Process for preparing conjugated diene (co)polymers in the presence of a catalytic system comprising a pyridyl iron (III) complex
申请人:Versalis S.p.A.
公开号:US10793653B2
公开(公告)日:2020-10-06
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. —n is 3; (b) at least one co-catalyst selected from organo-aluminum derivatives, preferably from: (b1) aluminum compounds having general formula (III): Al(R7)(R8)(R9) (IIl) wherein R7 represents 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, identical or different, are selected from linear or branched C1-C20 alkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, arylalkyl groups; (b2) aluminoxanes having general formula (IV): (R10)2—Al—O—[-AI(R11)—O-]m-AI-(R12)2 (IV), wherein R10, R11 and R12, identical or different, represent a hydrogen atom, or a halogen atom such as chlorine, bromine, iodine, fluorine; or 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; (b3) partially hydrolyzed organo-aluminum derivatives; (b4) haloaluminum alkyls having general formula (V) or (VI): AI(R13)p(X′)3-p (V) AI2(R13)q(X′)3-q (VI) wherein p is 1 or 2; q is an integer ranging from 1 to 5; R13, identical or different, are selected from linear or branched C1-C20 alkyl groups; X′ represents a chlorine or bromine atom, preferably chlorine; provided that said co-catalyst (b) is not selected from organo-boron derivatives.
一种制备共轭二烯(共)聚合物的工艺,包括在催化体系存在下聚合至少一种共轭二烯,该催化体系包括: (a) 至少一种具有通式(I)或(II)的吡啶基铁(III)络合物: 其中:-R1、R2、R3 和 R4,相同或不同,代表氢原子;或选自直链或支链、任选卤化的 C1-C20,优选 C1-C15,烷基、任选取代的环烷基、任选取代的芳基;-R5 代表氢原子,或选自直链或支链、任选卤化的 C1-C20,优选 C1-C15,烷基、任选取代的环烷基、任选取代的芳基;-X,相同或不同,代表卤原子,例如氯、溴、碘;或选自直链或支链 C1-C20,优选 C1-C15,烷基、-OCOR6 基团或-OR6 基团,其中 R6 选自直链或支链 C1-C20,优选 C1-C15,烷基。-(b) 至少一种助催化剂,选自有机铝衍生物,最好选自: (b1) 具有通式 (III) 的铝化合物:Al(R7)(R8)(R9) (IIl) 其中 R7 代表氢原子,或选自直链或支链 C1-C20 烷基、环烷基、芳基、烷芳基、芳烷基、烷氧基;R8 和 R9 相同或不同,选自直链或支链 C1-C20 烷基、环烷基、芳基、烷芳基、芳烷基; (b2) 具有通式(IV)的铝氧烷:(R10)2-Al-O-[-AI(R11)-O-]m-AI-(R12)2 (IV),其中 R10、R11 和 R12 相同或不同,代表氢原子或卤素原子,如氯、溴、碘、氟;(b2) 部分水解的有机铝衍生物; (b3) 部分水解的有机铝衍生物; (b4) 具有通式 (V) 或 (VI) 的卤代烷基铝:AI(R13)p(X′)3-p(V) AI2(R13)q(X′)3-q(VI) 其中p是1或2;q是1至5的整数;R13,相同或不同,选自直链或支链C1-C20烷基;X′代表氯或溴原子,最好是氯;条件是所述助催化剂(b)不选自有机硼衍生物。