Illinois Tool Works Inc.

Kenneth A Lambert

Xiaobin Wang

Donald Edmond Gosiewski

Daniel K Doe

Patricia M Savory

Daniel Leeser

William E Loven

Adhesive formulations having acrylate monomer or methacrylate monomer, or mixtures thereof, and having a reducing agent and an initiator (e.g., peroxide). The formulations may include a chelating agent solution to improve storage stability and other properties. Further, the mole ratio of the initiator to the reducing agent may be adjusted to control weight loss of the adhesives during cure. Polyvinyl acetate or its derivatives may also be employed in the adhesive formulations to reduce weight loss during cure. Moreover, certain embodiments of the formulations include a toughening-agent copolymer having a glass transition temperature (of at least one domain) that is lower than &#x2212;50&#xb0; C. (&#x2212;58&#xb0; F.). These toughening-agent copolymers may be added to the adhesive formulations to improve impact strength and other properties of the cured adhesives at lower temperatures, e.g., &#x2212;40&#xb0; C. (&#x2212;40&#xb0; F.), while maintaining performance of the cured adhesives at higher temperatures, e.g., 82&#xb0; C. (180&#xb0; F.).

Acrylic adhesives for metal bonding applications

An adhesive comprising a combination of high molecular weight acrylic and/or methacrylic esters, which become co-polymerized with low molecular weight acrylic and/or methacrylic esters, and advantageously polymers, such as impact modifiers including graft co-polymer (core-shell and non core-shell) impact modifiers, carboxylic acids, elastomers, and sulfur bearing compositions, such as chlorosulfonated polymers.

Structural adhesive

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Billerica, MA, United States of America

Kenneth A Lambert