Exxonmobil Chemical Patents Inc.

Joseph M Delucia

James Norris Coffey

Jurgen J M Schroeyers

Yann Devorest

Mun Fu Tse

George Rodriguez

Jianya Cheng

Jean-Roch H Schauder

Phillip Thomas Matsunaga

Ranjan Tripathy

Jennifer J Austin

Jurgen J Schroeyers

Shawn W Mowry

Michael Kenneth Lyon

William Gary Stevenson

Marijke Vandevelde

Jurgen JM Schroeyers

An adhesive composition comprising a polyolefin composition comprising a homopolymer of propylene or a copolymer of propylene and ethylene or a Cto Calpha-olefin, and a nucleating agent effective for decreasing the set time for the adhesive composition in comparison to an otherwise identical adhesive composition in which the nucleating agent is absent. The adhesive composition may have a Dot T-Peel of 1 Newton or more on Kraft paper.

Polyolefin adhesive compositions comprising nucleating agents for improved set time

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

This invention relates to processes for the preparation of a dynamically vulcanized alloy comprising at least one isobutylene-containing elastomer and at least one thermoplastic resin. More specifically, the processes produce dynamically vulcanized alloys with unique morphological features which have good impermeability and low temperature flexibility.

Process for preparing dynamically vulcanized alloys

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Pittsburgh, PA, United States of America

Joseph M Delucia