Exxonmobil Chemical Patents Inc.

Yann Devorest

James Norris Coffey

Joseph M Delucia

Mun Fu Tse

George Rodriguez

Jean-Roch H Schauder

Phillip Thomas Matsunaga

Bryan Robert Chapman

Chia Yung Cheng

Jay K Keung

Bruce R Lundmark

Eric Paul Jourdain

Ranjan Tripathy

Alistair Duncan Westwood

Jennifer J Austin

Michael Charles Bulawa

Jurgen J Schroeyers

Jurgen J M Schroeyers

Shawn W Mowry

Olivier Georjon

Jurgen JM Schroeyers

Alistair D Westwood

A multi-modal polymer blend for use in an adhesive composition comprising at least two compositionally different propylene-based polymers. The multi-modal polymer blend has a Mw of about 10,000 g/mol to about 150,000 g/mol. When subjected to Temperature Rising Elution Fractionation, the multi-modal polymer blend exhibits a first fraction that is soluble at &#x2212;15&#xb0; C. in a hydrocarbon solvent, such as xylene or ortho-dichlorobenzene, the first fraction having an isotactic (mm) triad tacticity of about 70 mol % to about 90 mol %; and a second fraction that is insoluble or less soluble than the first fraction at &#x2212;15&#xb0; C. in the hydrocarbon solvent, the second fraction having an isotactic (mm) triad tacticity of about 85 mol % to about 98 mol %.

Polyolefin adhesive compositions

The present invention is related to adhesive compositions comprising a polymer blend of at least two different propylene-based polymers and one or more tackifiers. The polymer blend has a melt viscosity of about 900 cP to about 19,000 cP. When subjected to Temperature Rising Elution Fractionation, the polymer blend exhibits a first fraction that is soluble at &#x2212;15&#xb0; C. in xylene, the first fraction having an isotactic (mm) triad tacticity of about 70 mol % to about 90 mol %; and a second fraction that is insoluble or less soluble than the first fraction at &#x2212;15&#xb0; C. in xylene, the second fraction having an isotactic (mm) triad tacticity of about 85 mol % to about 98 mol %. The tackifier has a softening point, as determined by ASTM E-28, of about 85 to about 135&#xb0; C. and an aromaticity of about 2 to about 12 mol % aromatic protons.

Tackified polyolefin adhesive compositions

A process for preparing a blend of thermoplastic polymer and resin modifier within a single-screw extruder, wherein the resin modifier is a hydrocarbon resin.

Methods and apparatus for forming blends of polyolefin and resin modifier

An elastomeric composition and method for making the same are provided. The composition can include a rubber component comprising one or more ethylene-propylene elastomers, one or more peroxide curing agents and one or more non-functionalized plasticizers having a viscosity index of 120 or more.

Properties of peroxide-cured elastomer compositions

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Waterloo, Belgium

Yann Devorest