Exxonmobil Chemical Patents Inc.

Keith A Nelson

Sudhin Datta

Peijun Jiang

Jo Ann M Canich

Kenneth Lewtas

David John Lohse

Jean M Tancrede

Anthony George Karandinos

Olivier J F Georjon

Charles C Cozewith

Bruce Alan Harrington

Bruce Allan Harrington

Ramin Abhari

Armenag Hagop Dekmezian

Jo Ann Marie Canich

Charles Lewis Sims

Cesar Alberto Garcia-Franco

Lutz Erich Jacob

Christopher Lewis Curry

Nicolas Kappes

Michel Louis Faissat

Olivier J Georjon

Lutz E Jacob

Nicholas Kappes

Armengag Dekmezian

Michael L Faisset

Nicholas Knappes

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

Embodiments of the present invention relate to article comprising a polymer comprising one or more C3 to C40 olefins, optionally one or more diolefins, and less than 5 mole % of ethylene having a Dot T-Peel of 1 Newton or more, a branching index (g') of 0.95 or less measured at the Mz of the polymer; and an Mw of 100,000 or less. This invention further relates to a process to produce an olefin polymer comprising: 1) selecting a first catalyst component capable of producing a polymer having an Mw of 100,000 or less and a crystallinity of 20% or less; 2) selecting a second catalyst component capable of producing polymer having an Mw of 100,000 or less and a crystallinity of 40% or more; 3) contacting the catalyst components in the presence of one or more activators with one or more C3 to C40 olefins, in a reaction zone.

Polyolefin adhesive compositions and articles made therefrom

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.

The invention relates to novel adhesive alpha-olefin inter-polymers which are largely amorphous and have a rheological behavior that makes them suitable for adhesive use, both without and with minimzed amounts of tackifying resins. Specifically, the invention poly-alpha olefin inter-polymer may be composed of A) from 60 to 94% of units derived from one alpha mono-olefin having from 3 to 6 carbon atoms and B) from 6 to 40 mol % of units derived from one or more other mono-olefins having from 4 to 10 carbon atoms and at least one carbon atom more than A); and C) optionally from 0 to 10 mol % of units derived from another copolymerizable unsaturated hydrocarbon, different from A) and B); the diad distribution of component A in the polymer as determined byC NMR as described herein showing a ratio of experimentally determined diad distribution over the calculated Bernoullian diad distribution of less than 1.07; and the storage modulus G' of said polymer, determined upon cooling as described herein, intersecting a value of 3.10Pa at a temperature of less than 85&#xb0; C. The invention also describes polymerization processes suitable for the manufacture of these adhesive alpha-olefin inter-polymers.

Adhesive alpha-olefin inter-polymers

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 C to C &agr;-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&deg; dg/min. at 230&deg; C. Certain specific embodiments of the invention involve the use of a free radical initiator, e.g., a peroxide.

The invention relates to novel adhesive alpha-olefin inter-polymers which are largely amorphous and have a rheological behavior that makes them suitable for adhesive use, both without and with minimized amounts of tackifying resins. Specifically, the invention poly-alpha olefin inter-polymer may be composed of A) from 60 to 94 mol % of units derived from one alpha mono-olefin having from 3 to 6 carbon atoms and B) from 6 to 40 mol % of units derived from one or more other mono-olefins having from 4 to 10 carbon atoms and at least one carbon atom more than A); and C) optionally from 0 to 10 mol % of units derived from another copolymerizable unsaturated hydrocarbon, different from A) and B); the diad distribution of component A in the polymer as determined by C NMR as described herein showing a ratio of experimentally determined diad distribution over the calculated Bernoullian diad distribution of less than 1.07; and the storage modulus G&prime; of said polymer, determined upon cooling as described herein, intersecting a value of 3.10 Pa at a temperature of less than 85&deg; C. The invention also describes polymerization processes suitable for the manufacture of these adhesive alpha-olefin inter-polymers.

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Baton Rouge, LA, United States of America

Keith A Nelson