Active non-metallocene pre-catalyst and method for tactic catalytic polymerization of alpha-olefin monomers
申请人:Ramot University Authority for Applied Research & Industrial Development Ltd.
公开号:US06686490B1
公开(公告)日:2004-02-03
An active non-metallocene pre-catalyst featuring a diamine diphenolate complex and a corresponding method for catalytic polymerization, in general, and, tactic catalytic polymerization, in particular, of alpha-olefin monomers using the disclosed pre-catalyst. General formulas of the non-metallocene diamine diphenolate pre-catalyst are [{OR5R6R7R8(C6)1(CHR3)NR1YNR2(CHR4)(C6)2R9R10R11R12O}MX1X] and [{OR5R6R7R8(C6)1(CHR3)NR1YNR2(CHR4)(C6)2R9R10R11R12O}MX3], where M is a metal atom covalently bonded to each oxygen atom, O, and, bonded to each nitrogen atom, N, with varying degrees of covalency and coordination; X1 and X2 are each a univalent anionic ligand covalently bonded to the metal atom; X3 is a single univalent or a divalent anionic ligand covalently bonded to the metal atom; R1 and R2 are each a univalent radical covalently bonded to a different one of the two nitrogen atoms; R3 is a univalent radical covalently bonded to the carbon atom of the —CHR3— of the (C6)1—CHR3—N— bridging unit; R4 is a univalent radical covalently bonded to the carbon atom of the —CHR4— of the —N—CHR4—(C6)2 bridging unit; R5 through R8 are each a univalent radical covalently bonded to a different carbon atom in the first aromatic group, (C6)1; R9 through R12 are each a univalent radical covalently bonded to a different carbon atom in the second aromatic group, (C6)2; and, Y is a divalent radical covalently bonded to and bridging between the two nitrogen atoms. The diamine diphenolate pre-catalyst, when activated by a co-catalyst under mild reaction conditions, is active for isotactic (isospecific) and living polymerization of a variety of alpha-olefin monomers, such as 1-hexene, for forming poly(alpha-olefin) products, such as poly(1-hexene), having classifiable degree of tacticity, high molecular weight and low molecular weight distribution.
一种活性非金属环前催化剂,具有二胺二酚酚配合物,以及一种用于催化聚合的方法,一般而言,特别是使用所述前催化剂进行策略性催化聚合的α-烯烃单体。非金属环二胺二酚前催化剂的一般公式为[{OR5R6R7R8(C6)1(CHR3)NR1YNR2(CHR4)(C6)2R9R10R11R12O}MX1X]和[{OR5R6R7R8(C6)1(CHR3)NR1YNR2(CHR4)(C6)2R9R10R11R12O}MX3],其中M是与每个氧原子O共价键合的金属原子,并且与每个氮原子N以不同程度的共价性和配位性结合;X1和X2分别是与金属原子共价键合的一价阴离子配体;X3是与金属原子共价键合的单价或二价阴离子配体;R1和R2分别是与两个氮原子中的不同一个共价键合的一价基团;R3是与(C6)1—CHR3—N—桥接单元的碳原子共价键合的一价基团;R4是与—N—CHR4—(C6)2桥接单元的碳原子共价键合的一价基团;R5到R8分别是与第一个芳香族基团(C6)1中的不同碳原子共价键合的一价基团;R9到R12分别是与第二个芳香族基团(C6)2中的不同碳原子共价键合的一价基团;Y是与并桥接两个氮原子的二价基团。二胺二酚前催化剂在温和反应条件下由共催化剂激活时,对各种α-烯烃单体,如1-己烯,进行等向性(同构特异性)和活性聚合,形成具有可分类的取向度、高分子量和低分子量分布的聚(α-烯烃)产物,如聚(1-己烯)。