Exxonmobil Chemical Patents Inc.

Exxon Chemical Patents, Inc.

Hoechst Aktiengesellschaft

Terry John Burkhardt

Robert Tan Li

Udo M Stehling

William T Haygood, Jr

Matthew Cornyn Kuchta

James R Hart

James Charles Vizzini

Francis Charles Rix

William Thomas Haygood

Aspy Keki Mehta

Patrick Brant

Anthony Nicholas Speca

Lawrence Carl Smith

Masahide Murata

William B Brandley

Dawn C Wiser

John Richard Shutt

Gerhard Luft

Shiaw Tzuu Ju

Ted Alexander Powell

Douglas J McLain

George Rodriguez

David H McConville

Hans Thomann

Jeffrey Lawrence Brinen

George Alan Vaughan

Yuan-Ju Chen

Burkhard Endeward

Jeffrey Harold Butler

Gerhard Franz Luft

A process is described for producing a polymer blend comprising (a) a first polymer component comprising a crystalline propylene polymer and (b) a second polymer component comprising a copolymer of propylene with at least one comonomer, wherein the copolymer comprises between about 7 wt % and about 28 wt % of comonomer and the copolymer has a heat of fusion of 0.5 to 70 J/g and an mm triad tacticity of 75% or greater. The process comprises polymerizing propylene under first polymerization conditions in a polymerization reaction zone to produce a first effluent comprising a crystalline propylene polymer containing no more than 10% by weight of other monomers, the first polymerization conditions comprising a first reaction temperature between about 50&#xb0; C. and about 100&#xb0; C. Propylene is then copolymerized with at least one comonomer under second polymerization conditions in the presence of a metallocene catalyst and at least part of said first effluent in a slurry polymerization reaction zone to produce the second polymer component as a blend with the first polymer component, the second polymerization conditions comprising a second reaction temperature at least 7&#xb0; C. less than the first reaction temperature.

Process of producing thermoplastic polymer blends

A polymerization process is provided. For example, a polymerization process is described, including providing a catalyst slurry having a metallocene catalyst and a first oil, providing a transport medium including a second oil and combining the transport medium and the catalyst slurry to form a catalyst mixture. The process may further include introducing the catalyst mixture to a polymerization reactor and contacting olefin monomers with the catalyst mixture to polymerize the olefin monomers and form polyolefins.

Methods of delivering catalyst systems for propylene polymerization

Disclosed herein is a method for determining the presence of an activated catalyst site in a catalyst system comprising a catalyst precursor and an activator, wherein the catalyst system is capable of providing a luminescence, the method comprising: performing a time resolved luminescence analysis on a reference analyte comprising the catalyst precursor that is not in combination with the activator, and performing a time resolved luminescence analysis on a sample analyte comprising the catalyst precursor in combination with the activator, determining a reference emission energy and a reference lifetime each associated with a maximum emission intensity in the reference output values; determining a sample emission energy and a sample lifetime each associated with a maximum emission intensity in the sample output values; and comparing the values to determine if the sample comprises an activated catalyst site. Use of the above method in relation to an activation index is also disclosed.

Analysis method

This invention relates to a process to polymerize olefins comprising contacting, in a polymerization system, olefins having three or more carbon atoms with a catalyst compound, activator, optionally comonomer, and optionally diluent or solvent, at a temperature above the cloud point temperature of the polymerization system and a pressure no lower than 10 MPa below the cloud point pressure of the polymerization system, where the polymerization system comprises any comonomer present, any diluent or solvent present, the polymer product, where the olefins having three or more carbon atoms are present at 40 weight % or more.

Polymer production at supercritical conditions

Olefin polymerization processes using catalyst systems based on metallocenes and olefin, in particular, propylene polymers obtainable thereby. The metallocenes may be represented by the formula: wherein Mpreferably is zirconium or hafnium; and Ris different from hydrogen.

Polymerization process and polymer composition

This invention relates to a catalyst support comprising the result of the combination of:

Hydrophobization and silica for supported catalyst

Metallocenes and catalyst systems for olefin polymerization derived therefrom. The metallocenes may be represented by the formula: wherein Mpreferably is zirconium or hafnium; and Ris different from hydrogen.

Metallocenes and catalyst compositions derived therefrom

Metallocenes and catalyst systems for olefin polymerization derived therefrom. The metallocenes may be represented by the formula: 

The present invention relates to ligands and the synthesis of those ligands for use in metallocene complexes. More particularly, the present invention relates to the synthesis of diarylsilyl bridged biscyclopentadienes using diarylsilyldisulfonates. Even more particularly, the present invention describes Group IV metallocenes containing diarylsilyl bridged bis-cyclopentadienyl ligands prepared from contacting a diarylsilyldisulfonate with an organometallic indenyl reagent.

Bridged biscyclopentadienyl ligands and method of preparation

Method of preparing group 14 bridged biscyclopentadienyl ligands

This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization. The metallocene compositions may be represented by the formula:wherein Rare identical or different and are each a halogen atom, a C-Calkyl group which may be halogenated, a C-Caryl group which may be halogenated, a C-Calkenyl group, a C-C-arylalkyl group, a C-Calkylaryl group, a C-Carylalkenyl group, a &#x2014;NR', &#x2014;SR&#x2032;, &#x2014;OR&#x2032;, &#x2014;OSiR&#x2032;or &#x2014;PR&#x2032;radical, wherein R&#x2032; is one of a halogen atom, a C-Calkyl group, or a C-Caryl group, and Rand Rare identical or different and are a Group 14 radical having from 1 to 20 carbon atoms or are each primary, secondary or tertiary butyl groups, aryl groups, isopropyl groups, fluoroalkyl groups, trialkyl silyl groups, or other groups of similar size.

Metallocene compositions

This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization. The metallocene compositions are generally those of the bridged bis(2-R-4-phenylindenyl)metallocene type wherein the bridge is represented by the formula:wherein: Rto Rare identical or different and are one of a hydrogen atom, a C-Calkyl group, a C-Calkoxy group, a C-Caryl group, a C-Caryloxy group, a C-Calkenyl group, a C-Carylalkyl group, a C-Calkylaryl group, a C-Carylalkenyl group, or a halogen atom, or a conjugated diene which is optionally substituted with one or more hydrocarbyl, tri(hydrocarbyl)silyl groups or hydrocarbyl, tri(hydrocarbyl)silylhydrocarbyl groups, said diene having up to 30 atoms not counting hydrogen; or two or more adjacent radicals Rto R, including Rand R, together with the atoms connecting them form one or more rings; preferably, Rto Rare hydrogen, and Mis carbon, silicon, germanium or tin, preferably silicon.

This invention relates to bridged indenyl metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization. The bridge may be represented by the formula:wherein: Rto Rare identical or different, and are one of a hydrogen atom, a C-Calkyl group, a C-Calkoxy group, a C-Caryl group, a C-Caryloxy group, a C-Calkenyl group, a C-Carylalkyl group, a C-Calkylaryl group, a C-Carylalkenyl group, or a halogen atom, or together are a conjugated diene which is optionally substituted with one or more hydrocarbyl, tri(hydrocarbyl)silyl groups or hydrocarbyl, tri(hydrocarbyl)silylhydrocarbyl groups, said diene having up to 30 atoms not counting hydrogen; or two or more adjacent radicals Rto R, including Rand R, together with the atoms connecting them form one or more rings; and Mis carbon, silicon, germanium or tin.

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Kingwood, TX, United States of America

Terry John Burkhardt