申请人:——
公开号:US20030191013A1
公开(公告)日:2003-10-09
The invention relates to heterogeneous catalytic systems obtainable by reacting a porous inorganic support with an alumoxane and subsequently supporting at least one metallocene compound thereon, characterized in that the metallocene compound is defined by the following general formulas:
1
wherein:
L, equal to or different from each other, is selected from the group comprising: cyclopentadienyl, indenyl, tetrahydroindenyl, fluorenyl, octahydrofluorenyl or benzoindenyl; each R is independently selected from hydrogen, C
1
-C
20
alkyl, C
3
-C
20
cycloalkyl, C
6
-C
20
aryl, C
3
-C
20
alkenyl, C
7
-C
20
arylalkyl, C
7
-C
20
alkylaryl, C
8
-C
20
arylalkenyl, linear or branched, optionally substituted by 1 to 10 halogen atoms, or a group SiR
II
3
; each R
I
, equal to or different from each other, is a divalent aliphatic or aromatic hydrocarbon group containing from 1 to 20 carbon atoms, optionally containing from 1 to 5 heteroatoms of groups 14 to 16 of the periodic table of the elements and boron ; preferably it is: C
1
-C
20
alkylene, C
3
-C
20
cycloalkylene, C
6
-C
20
arylene, C
7
-C
20
alkenyl, C
7
-C
20
arylalkylene, or alkylarylene, linear or branched, or a group SiR
II
2
; each R
II
is independently selected from C
1
-C
20
alkyl , C
3
-C
20
cycloalkyl, C
6
-C
20
aryl, C
3
-C
20
alkenyl, C
7
-C
20
arylalkyl, C
8
-C
20
arylalkenyl or C
7
-C
20
alkylaryl, linear or branched; preferably R
II
is methyl, ethyl, isopropyl; each Q is independently selected from B, C, Si, Ge, Sn; M is a metal of group 3, 4 or 10 of the Periodic Table, Lanthanide or Actinide; preferably it is titanium, zirconium or hafnium; each X is independently selected from: hydrogen, chlorine, bromine, OR
II
, NR
II
2
, C
1
-C
20
alkyl or C
6
-C
20
aryl; L′ is N or O; z is equal to 0, 1 or 2; x is equal to 1, 2 or 3; y is equal to 1, 2 or 3; x+y+z is equal to the valence of M; m is an integer which can assume the values 1, 2, 3 or 4; a and b are integers whose value ranges from 0 to k−1; f is an integer whose value ranges from 1 to k; g is an integer whose value ranges from 0 to 1; c and e are equal to 0 or 1; a+b+c is at least 1; a+g+c is at least 1; d is equal to 0, 1 or 2; when Q is B then c+d=1; when Q is C, Si, Ge or Sn, then c+d=2; when L′ is N, then g+e=1; when L′ is O, then g=0 and e=0.
The invention also relates to the polymerization process making use of the above defined catalytic
本发明涉及通过将多孔无机支撑物与铝氧烷反应,随后在其上支撑至少一种金属茂化合物而获得的异质催化系统,其特征在于所述金属茂化合物由以下一般式定义:其中,L,相同或不同,选自包括:环戊二烯基、茚基、四氢茚基、芴基、八氢芴基或苯并茚基的群体;每个R独立地选自氢、C1-C20烷基、C3-C20环烷基、C6-C20芳基、C3-C20烯基、C7-C20芳基烷基、C7-C20烷基芳基、C8-C20芳基烯基,线性或支链,可选地被1到10个卤素原子取代,或SiRII3基团;每个RI,相同或不同,是含有1到20个碳原子的二价脂肪族或芳香族碳氢基团,可选地含有周期表14到16族和硼的1到5个杂原子;优选为:C1-C20烷基、C3-C20环烷基、C6-C20芳基、C7-C20烯基芳基烷基或烷基芳基烷基,线性或支链,或SiRII2基团;每个RII独立地选自C1-C20烷基、C3-C20环烷基、C6-C20芳基、C3-C20烯基、C7-C20芳基烷基、C8-C20芳基烯基或C7-C20烷基芳基,线性或支链;优选RII为甲基、乙基、异丙基;每个Q独立地选自B、C、Si、Ge、Sn;M为周期表3、4或10族、镧系或锕系金属;优选为钛、锆或铪;每个X独立地选自:氢、氯、溴、ORII、NRII2、C1-C20烷基或C6-C20芳基;L'为N或O;z等于0、1或2;x等于1、2或3;y等于1、2或3;x+y+z等于M的价;m是可以取值为1、2、3或4的整数;a和b是值范围从0到k-1的整数;f是值范围从1到k的整数;g是值范围从0到1的整数;c和e等于0或1;a+b+c至少为1;a+g+c至少为1;d等于0、1或2;当Q为B时,则c+d=1;当Q为C、Si、Ge或Sn时,则c+d=2;当L'为N时,则g+e=1;当L'为O时,则g=0且e=0。本发明还涉及利用上述定义的催化剂进行聚合的过程。