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:US20190270832A1
公开(公告)日:2019-09-05
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: —R
1
, R
2
, R
3
and R
4
, identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated C
1
-C
20
, preferably C
1
-C
15
, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; —R
5
represents a hydrogen atom, or is selected from linear or branched, optionally halogenated C
1
-C
20
, preferably C
1
-C
15
, 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 C
1
-C
20
, preferably C
1
-C
15
, alkyl groups, —OCOR
6
groups or —OR
6
groups wherein R
6
is selected from linear or branched C
1
-C
20
, preferably C
1
-C
15
, alkyl groups. —n is 3; (b) at least one co-catalyst selected from organo-aluminum derivatives, preferably from: (b
1
) aluminum compounds having general formula (III): Al(R
7
)(R
8
)(R
9
) (IIl) wherein R
7
represents a hydrogen atom, or is selected from linear or branched C
1
-C
20
alkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, arylalkyl groups, alkoxy groups; R
8
and R
9
, identical or different, are selected from linear or branched C
1
-C
20
alkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, arylalkyl groups; (b
2
) aluminoxanes having general formula (IV): (R
10
)
2
—Al—O—[-AI(R
11
)—O-]
m
-AI-(R
12
)
2
(IV), wherein R
10
, R
11
and R
12
, identical or different, represent a hydrogen atom, or a halogen atom such as chlorine, bromine, iodine, fluorine; or are selected from linear or branched C
1
-C
20
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; (b
3
) partially hydrolyzed organo-aluminum derivatives; (b
4
) haloaluminum alkyls having general formula (V) or (VI): AI(R
13
)
p
(X′)
3-p
(V) AI
2
(R
13
)
q
(X′)
3-q
(VI) wherein p is 1 or 2; q is an integer ranging from 1 to 5; R
13
, identical or different, are selected from linear or branched C
1
-C
20
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)聚合物的方法,包括在催化体系的存在下聚合至少一种共轭二烯,所述催化体系包括:(a)至少一种具有一般式(I)或(II)的吡啶基铁(III)配合物:其中:-R1,R2,R3和R4,相同或不同,表示氢原子;或选自线性或支链的,可选卤代的C1-C20,优选C1-C15,烷基,可选取代的环烷基,可选取代的芳基;-R5表示氢原子,或选自线性或支链的,可选卤代的C1-C20,优选C1-C15,烷基,可选取代的环烷基,可选取代的芳基;-X,相同或不同,表示卤原子,例如氯、溴、碘;或选自线性或支链的C1-C20,优选C1-C15,烷基,-OCOR6基团或-OR6基团,其中R6选自线性或支链的C1-C20,优选C1-C15,烷基。-n为3;(b)至少一种有机铝衍生物的协同催化剂,优选自:(b1)具有一般式(III)的铝化合物:Al(R7)(R8)(R9)(III),其中R7表示氢原子,或选自线性或支链的C1-C20烷基,环烷基,芳基,烷基芳基基,芳基烷基基,烷氧基;R8和R9,相同或不同,选自线性或支链的C1-C20烷基,环烷基,芳基,烷基芳基基,芳基烷基基;(b2)具有一般式(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,表示氢原子,或卤原子,例如氯、溴、碘、氟;或选自线性或支链的C1-C20烷基,环烷基,芳基,所述基团可以选择性地取代一个或多个硅或锗原子;m为0至1000的整数;(b3)部分水解的有机铝衍生物;(b4)具有一般式(V)或(VI)的卤代铝烷:Al(R13)p(X′)3-p(V)或AI2(R13)q(X′)3-q(VI),其中p为1或2;q为1至5的整数;R13,相同或不同,选自线性或支链的C1-C20烷基;X′表示氯或溴原子,优选氯;前提是所述协同催化剂(b)不选自有机硼衍生物。