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Patent Searching and Data


Title:
CATALYSTS WITH AT LEAST TWO TRANSITION METAL COMPOUNDS AND POLYMERIZATION PROCESSES USING THEM
Document Type and Number:
WIPO Patent Application WO2002060957
Kind Code:
A3
Abstract:
The application describes a mixed olefin polymerization catalyst composition comprising a support, a reaction product of at least one first organometallic compound and a first activator capable of rendering the first organometallic compound active for insertion polymerization, and at least one second organometallic compound, the activator incapable of rendering the second organometallic compound active for polymerization of the monomers. The mixed catalyst composition can be used to prepare a first polymer component in a first polymerization reactor stage and then, when an effective activator is added for the second organometallic compound, the catalyst composition can be used to prepare a second polymer composition that is homogeneously blended with the first polymer component.

Inventors:
BRINEN JEFFREY L (US)
COZEWITH CHARLES (US)
Application Number:
US0143540W
Publication Date:
February 13, 2003
Filing Date:
November 16, 2001
Export Citation:
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Assignee:
EXXONMOBIL CHEM PATENTS INC (US)
BRINEN JEFFREY L (US)
COZEWITH CHARLES (US)
International Classes:
C08F4/626; C08F4/02; C08F4/06; C08F4/12; C08F4/14; C08F4/16; C08F4/20; C08F4/60; C08F4/6392; C08F4/72; C08F10/00; C08F4/659; C08F4/6592; (IPC1-7): B01J31/00; B01J37/00; C08F4/02; C08F4/06; C08F4/60; C08F4/72
Foreign References:
US6051525A2000-04-18
US6037296A2000-03-14
US6013595A2000-01-11
US5723399A1998-03-03
US5237025A1993-08-17
US5077255A1991-12-31
Other References:
See also references of EP 1368119A4
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