Exxonmobil Chemical Patents Inc.

Exxon Research and Engineering Company

Exxon Chemical Patents, Inc.

Other

Exxonmobile Chemical Patents Inc.

Charles C Cozewith

Sudhin Datta

Avinash Chandrakant Gadkari

Gary W Verstrate

Shiaw Ju

Edmund J Stachowski, Iii

Periagaram Srinivasan Ravishankar

Bruce Alan Harrington

Weiguo Hu

Cyrus A Irani

Kenneth Lewtas

David John Lohse

Jean M Tancrede

Anthony George Karandinos

Keith A Nelson

Olivier J F Georjon

Stephen S Kasegrande

Donna Jean Crowther

Maria Dolores Ellul

John F Walzer, Jr

Bernard J Folie

Roger K West

Gaetano A Capone

Gary William Ver Strate

Aspy Keki Mehta

Narayanaswami R Dharmarajan

Donald R Hazelton

Palanisamy Arjunan

Jeffrey Lawrence Brinen

William M Davis

Lawrence G Kaufman

Thomas J Pacansky

Erik G Tornqvist

Ronald L Hazelton

George N Schmit

Simon X Zhang

Gary William Verstrate

Pratima Rangarajan

Periagaram Periagaram

Mark A McHugh

Terry L Guckes

Olivier J Georjon

An adhesive blend is described that can include a semi-crystalline copolymer of propylene and at least one comonomer selected from the group consisting of ethylene and at least one Cto C&#x3b1;-olefin, the copolymer having a weight average molecular weight (Mw) from about 15,000 to about 200,000; an melt index (MI) from about 7 dg/min to about 3000 dg/min as measured by ASTM D 1238 (B), and a (Mw/Mn) of approximately 2. Various production processes are also described. Also described are adhesive compositions and methods for making adhesive compositions having polymers or polymer blends with melt flow rates (MFRS) equal to and above 250 dg/min. at 230&#xb0;C. Certain specific embodiments of the invention involve the use of a free radical initiator, e.g., a peroxide.

Polypropylene-based adhesive compositions

Improved thermoplastic polymer blend compositions comprising an isotactic polypropylene component and an alpha-olefin and propylene copolymer component, said copolymer comprising crystallizable alpha-olefin sequences. In a preferred embodiment, improved thermoplastic polymer blends are provided comprising from about 35% to about 85% isotactic polypropylene and from about 30% to about 70% of an ethylene and propylene copolymer, wherein said copolymer comprises isotactically crystallizable propylene sequences and is predominately propylene. The resultant blends manifest unexpected compatibility characteristics, increased tensile strength, and improved process characteristics, e.g., a single melting point.

Propylene olefin copolymers

An adhesive blend is described that can include a semi-crystalline copolymer of propylene and at least one comonomer selected from the group consisting of ethylene and at least one Cto C&#x3b1;-olefin, the copolymer having a weight average molecular weight (Mw) from about 15,000 to about 200,000; an melt index (MI) from about 7 dg/min to about 3000 dg/min as measured by ASTM D 1238(B), and a (Mw/Mn) of approximately 2. Various production processes are also described. Also described are adhesive compositions and methods for making adhesive compositions having polymers or polymer blends with melt flow rates (MFRs) equal to and above 250 dg/min. at 230&#xb0; C. Certain specific embodiments of the invention involve the use of a free radical initiator, e.g., a peroxide.

Crystalline propylene-hexene and propylene-octene copolymers

This invention relates to a process to produce propylene polymers comprising contacting a metallocene catalyst compound and an activator in a reaction medium comprising propylene, from 0 to 30 volume % of one or more solvents and from 0 to 30 mole % of one or more comonomers, under temperature and pressure conditions below the melting point of the propylene polymer and where:

Supercritical polymerization process and polymers produced therefrom

Polymer blend compositions of a first polymer component comprising an ethylene propylene copolymer and a second polymer component comprising an isotactic polypropylene copolymer. The first polymer component has a uniform distribution of both tacticity and comonomer between copolymer chains. Further, the first polymer component will exhibit a statistically insignificant intramolecular difference of tacticity.

Blends made from propylene ethylene polymers

Elastic blends comprising crystalline polymer and crystallizable polymers of propylene

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.

Polymerization process with mixed catalyst compositions

Alpha-olefin/propylene copolymers and their use

Thermoplastic polymer blends of isotactic polypropylene and alpha-olefin/propylene copolymers

Alpha-Olefin/propylene copolymers and their use

Growing community of inventors

Bellaire, TX, United States of America

Charles C Cozewith