Catalysts

Patent metadata

Field	Value
Publication number	US-2017320972-A1
Application number	US-201515526174-A
Country	US
Kind code	A1
Filing date	Nov 13, 2015
Priority date	Nov 13, 2014
Publication date	Nov 9, 2017
Grant date	—

Abstract

Novel catalytic compositions are disclosed comprising symmetrical metallocene catalytic compounds. Also disclosed are uses of such catalytic compositions in olefin polymerisation reactions, as well as processes for polymerising olefins. When compared with prior art compositions, the catalytic compositions of the invention are markedly more active in the polymerisation of olefins.

First claim

1 . A composition comprising a solid methyl aluminoxane support material and compound of the formula (I) shown below:

wherein
R 1 , R 2 , R 3 and R 4 are each independently (1-3C)alkyl;
Q is absent, or is a bridging group comprising 1, 2 or 3 bridging carbon atoms, and is optionally substituted with one or more groups selected from the group consisting of hydroxyl, (1-6C)alkyl, (2-6C)alkenyl, (2-6C)alkynyl, (1-6C)alkoxy, Si[(1-4C)alkyl] 3 , aryl, and —C(O)NR x R y ;
X is selected from zirconium, titanium or hafnium; and
each Y group is independently selected from the group consisting of halo, hydrogen, a phosphonate anion, a sulfonate anion, a borate anion, (1-6C)alkyl, (2-6C)alkenyl, (2-6C)alkynyl, (1-6C)alkoxy, aryl and aryloxy, wherein each of (1-6C)alkyl, (2-6C)alkenyl, (2-6C)alkynyl, (1-6C)alkoxy, aryl, and aryloxy is optionally substituted with one or more groups selected from the group consisting of (1-6C)alkyl, halo, nitro, amino, phenyl, (1-6C)alkoxy, Si[(1-4C)alkyl] 3 and —C(O)NR x R y ;
wherein R x and R y are independently (1-4C)alkyl.

2 . The composition according to claim 1 , wherein R 1 , R 2 , R 3 and R 4 are each independently (1-2C)alkyl.

3 . The composition according to claim 2 , wherein R 1 , R 2 , R 3 and R 4 are all methyl.

4 . The composition according to claim 1 , wherein Q is absent, or is a bridging group having the formula —[C(R a )(R b )—C(R c )(R d )]—, wherein R a , R b , R c and R d are independently selected from the group consisting of hydrogen, hydroxyl, (1-4C)alkyl, (2-4C)alkenyl, (2-4C)alkynyl and phenyl.

5 . The composition according to claim 4 , wherein Q is absent, or is a bridging group having the formula —CH 2 CH 2 —.

6 . The composition according to claim 1 , wherein each Y is independently selected from the group consisting of halo, —CH 2 C(CH 3 ) 3 and (1-2C)alkyl which is optionally substituted with halo or phenyl.

7 . The composition according to claim 6 , wherein each Y is independently selected from the group consisting of Cl, —CH 2 C(CH 3 ) 3 and —CH 2 C 6 H 5 .

8 . The composition according to claim 1 , wherein X is zirconium or hafnium.

9 . The composition according to claim 1 , wherein the compound of formula (I) has the formula (III):

wherein:
R 1 , R 2 , R 3 and R 4 are each independently (1-3C)alkyl;
X is selected from zirconium, titanium or hafnium; and
each Y group is independently selected from the group consisting of halo, hydrogen, a phosphonate anion, a sulfonate anion, a borate anion, (1-6C)alkyl, (2-6C)alkenyl, (2-6C)alkynyl, (1-6C)alkoxy, aryl and aryloxy, wherein each of (1-6C)alkyl, (2-6C)alkenyl, (2-6C)alkynyl, (1-6C)alkoxy, aryl, and aryloxy is optionally substituted with one or more groups selected from the group consisting of (1-6C)alkyl, halo, nitro, amino, phenyl, (1-6C)alkoxy, Si[(1-4C)alkyl] 3 and —C(O)NR x R y ,
wherein R x and R y are independently (1-4C)alkyl.

10 . The composition according to claim 1 , wherein the composition further comprises at least one suitable activator

11 . The composition according to claim 10 , wherein the activator is an alkyl aluminium compound.

12 . The composition according to claim 11 , wherein the activator is methylaluminoxane (MAO), triisobutylaluminium (TIBA), diethylaluminium (DEAC) or triethylaluminium (TEA).

13 . A process for forming a polyolefin comprising contacting a composition as defined in claim 1 with one or more olefin monomers to provide a homopolymer or a copolymer.

14 . The process according to claim 13 , wherein the copolymer comprises 1-10 wt % of a (4-8C) α-olefin.

15 . (canceled)

16 . The process according to claim 14 , wherein the process is performed at a temperature of 25-100° C.

17 . The process according to claim 14 , wherein the process is performed at a temperature of 70-80° C.

18 . The composition according to claim 9 , wherein R 1 , R 2 , R 3 and R 4 are all methyl.

19 . The composition according to claim 18 , wherein each Y is independently selected from Cl, —CH 2 C(CH 3 ) 3 or —CH 2 C 6 H 5 .

20 . The composition according to claim 19 , wherein X is zirconium or hafnium.

21 . The composition according to claim 20 , wherein X is zirconium.

Assignees

• Scg Chemicals Co Ltd

Inventors

• O'Hare Dermot
• Buffet Jean-Charles
• Khamnaen Tossapol
• Arnold Thomas

Classifications

• C08F4/65912 Primary

  in combination with an organoaluminium compound · CPC title

• C08F4/65927 Primary

  two cyclopentadienyl rings being mutually bridged · CPC title

• C08F110/02 Primary

  Ethene · CPC title

• C08F4/65916

  supported on a carrier, e.g. silica, MgCl2, polymer · CPC title

• C08F2500/01

  High molecular weight, e.g. >800,000 Da. · CPC title