# US 5,703,181 A · Catalyst olefin polymerization and process for olefin polymerization using the same

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- Number: US 5,703,181 A
- Document ID: US5703181A
- Status: Granted
- Kind: A
- Application number: 08/585,812
- Filed: 1996-01-16
- Granted: 1997-12-30
- Earliest claimed: 1992-11-18
- Assignees: Mitsui Petrochemical Industries, Ltd.
- Inventors: Takashi Tashiro; Takashi Ueda
- Web page: https://patentgrep.com/patent/US5703181A

## CPC

- C08F 10/00: Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F 4/65912: {in combination with an organoaluminium compound}
- C08F 4/65916: {supported on a carrier, e.g. silica, MgCl2, polymer}
- C08F 4/6592: containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
- C08F 4/65922: {containing at least two cyclopentadienyl rings, fused or not}
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

## Abstract

Disclosed are a catalyst for olefin polymerization comprising (A) a compound of a transition metal in Group IVB of the periodic table which contains a ligand having a cyclopentadienyl skeleton, (B) an organoaluminum compound and any one of (C1) a Br.o slashed.nsted acid; (C2) a material obtained by contacting (c-1) a magnesium compound with (c-2) an electron donor; and (C3) a material obtained by contacting (c-1) a magnesium compound, (c-2) an electron donor and (c-3) an organometallic compound with each other. Also disclosed are processes for polymerizing an olefin in the presence of the above-mentioned catalysts for olefin polymerization. Such catalysts and processes for olefin polymerization as described above are excellent in olefin polymerization activity and economical efficiency.

## Claims

### Claim 1

A process for olefin polymerization comprising polymerizing an olefin in the presence of a catalyst for olefin polymerization comprising:
(A) a compound of a transition metal in Group IVB of the Periodic Table, which is represented by the following formula (I'):
R.sup.1.sub.a R.sup.2.sub.b R.sup.3.sub.c R.sup.4.sub.d M
wherein M is zirconium; R.sup.1 is a ligand having a cyclopentadienyl skeleton; R.sup.2, R.sup.3 and R.sup.4 are each a ligand having a cyclopentadienyl skeleton, an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group, an alkoxy group, an aryloxy group, a trialkylsilyl group, SO.sub.3 R (wherein R is a hydrocarbon group of 1 to 8 carbon atoms or a substituted hydrocarbon group of 1 to 8 carbon atoms), a halogen atom or hydrogen atom, a is an integer of not less than 1; and a+b+c+d=4, and wherein at least one of R.sup.2, R.sup.3 and R.sup.4 is the ligand having the cyclopentadienyl skeleton;
(B) an organoaluminum compound; and
(C) a Br.o slashed.nsted acid which is a polystyrene strongly acidic cation-exchange resin having SO.sub.2 OH groups.

### Claim 2 (depends on 1)

The process of claim 1 wherein olefin is polymerized in the presence of a catalyst comprising the transition metal compound (A) in an amount of from about 0.00001 to 10 mmol per liter of polymerization volume, the organoaluminum compound (B) in an amount of from about 0.008 to 800 mmol per liter of polymerization volume, and the Br.o slashed.nsted acid (C) in an amount of about 0.0001 to 1,000 mmol in terms of ion exchange equivalent.

### Claim 3 (depends on 1)

The process of claim 1 wherein olefin is polymerized in the presence of a catalyst wherein the ratio of the amount of polystyrene cation-exchange resin (C) to the amount of the transition metal compound (A) is in the range of from about 0.5 to 1,000, in terms of ion exchange equivalent of the compound (C) to the metal gram atom of the transition metal.