Exxonmobil Chemical Patents Inc.

Christopher Lewis Curry

Sudhin Datta

Peijun Jiang

Jo Ann M Canich

Ramin Abhari

George Rodriguez

Armenag Hagop Dekmezian

Jo Ann Marie Canich

Charles Lewis Sims

Cesar Alberto Garcia-Franco

Jean M Tancrede

David Raymond Johnsrud

Fran A Shipley

Jurgen J Schroeyers

Lutz Erich Jacob

Keith A Nelson

Nicolas Kappes

Michel Louis Faissat

Lutz E Jacob

Nicholas Kappes

Armengag Dekmezian

Michael L Faisset

Nicholas Knappes

Provided are adhesive compositions composed of a polyolefin composition comprising at least about 50 wt. % polypropylene and at least one wax. The polymer compositions have a Dot T-Peel of about 1 Newton or more, a branching index (g') of 0.95 or less measured at the Mz of the polymer, a molecular weight of 100,000 or less, and the adhesive compositions has a fast set time. The packaging industry desires adhesive compositions having a fast set time, such as those setting in less than five seconds from a molten state at conventional packaging operating temperatures to a solid or quasi solid having favorable Dot T-Peel, set time, and or fiber tear adhesion properties. Polymer based adhesives performing within this window are a favorable alternative to conventional formulated adhesives. The provided adhesive compositions exhibit a favorable balance of properties such as high adhesive strength, wide temperature operating window, and fast set time.

Polyolefin adhesive compositions and articles made therefrom

Disclosed herein is the preparation of reaction products which contain carboxylic acid-grafted functionalized propylene homopolymers and copolymers that can be used as additives for polyolefin-based plastic products such as hot melt adhesives. Such reaction product additives may be prepared by: a) providing a first reactant comprising a selected type of relatively low molecular weight, low melt viscosity, molten propylene-based homopolymer or copolymer; b) forming a reaction mixture by adding to this first reactant a second reactant comprising an unsaturated carboxylic acid-based functionalizing agent, and an initiator comprising a certain type of organic peroxide; and c) maintaining the resulting reaction mixture at a relatively low temperature between about 130&#xb0; C. and about 165&#xb0; C. for a period of time and under conditions sufficient to form a reaction product which comprises acid-grafted propylene-based polymeric material, and which has a relatively high Grafting Efficiency.

Systems and methods used for functionalization of polymeric material and polymeric materials prepared therefrom

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.

Compositions are provided having from 70 wt % to 95 wt % of a polymer selected from homopolymers and random copolymers of propylene and from 5 wt % to 30 wt % of a miscible hydrocarbon resin with a glass transition temperature greater than 20&#xb0; C. The polymer has a heat of fusion of less than 50 J/g, a melt index (MI) of less than 20 dg/min, and contains stereoregular propylene crystallinity. Also provided are films containing such compositions, and articles, such as diapers or incontinence garments, including such films.

Elastic blends of semicrystalline propylene polymers and high glass transition temperature materials

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Seabrook, TX, United States of America

Christopher Lewis Curry