Exxonmobil Chemical Patents Inc.

Evan J Morris

Timothy Marlow Boller

Patrick Brant

John Robert Hagadorn

Jian Yang

Gregory J Karahalis

Chi-I Kuo

Xuan Ye

Kevin A Stevens

Yan Jiang

Shamah Lloyd

Christopher S Breiner

Jonathan J Schaefer

Logan E Shephard

Eyerusalem H Mamo

Methods to produce heterogeneous polyethylene granules, the method including: contacting first olefin monomers and second olefin monomers with a catalyst system in a single reaction zone to produce heterogeneous polyethylene granules and recovering the heterogeneous polyethylene granules; wherein the catalyst system includes a product of a combination including: one or more catalysts having a Group 3 through Group 12 metal atom or lanthanide metal atom; at least one activator; and optionally, one or more support material compositions; and wherein the heterogeneous polyethylene granules include a product of a combination of: a first portion comprising a first polyethylene including the first olefin monomers and the second olefin monomers; a second portion including a second polyethylene including the first monomers and the second monomers; and wherein the first polyethylene has a higher second monomer weight percent than the second polyethylene, are provided.

Methods to produce heterogeneous polyethylene granules

The present disclosure relates to asymmetric ansa-metallocene catalyst compounds that include at least one indenyl ligand substituted at the 3-position with a C-C&#x3b1;-branched alkyl, such as 1-methylethyl, 1-methylpropyl, 1-methylbutyl, 1-ethylbutyl, 1,3-dimethylbutyl, 1-methyl-1-ethylbutyl, 1,1-diethylbutyl, 1-propylpentyl, and the like. Catalyst systems prepared with the catalyst compounds, polymerization methods using such catalyst systems, and polyolefins made using the polymerization methods are also described.

Asymmetric-metallocene catalyst compounds for producing polyolefins having a broad molecular weight distribution

The present disclosure relates to ansa-metallocene catalyst compounds that include (1) a first indenyl ligand substituted at the 3-position with a substituted or unsubstituted C-Chydrocarbyl group, wherein the hydrocarbyl group is branched at the &#x3b2;-position, and (2) a second indenyl ligand substituted at its 3-position with a substituted or unsubstituted alkyl group or a &#x3b2;-branched alkyl group. Catalyst systems prepared with the catalyst compounds, polymerization methods using such catalyst systems, and polyolefins made using the polymerization methods are also described.

Catalysts that produce polyethylene with broad, bimodal molecular weight distribution

Growing community of inventors

Houston, TX, United States of America

Evan J Morris