Sika Technology Ag

John Hanley

Michael Gutgsell

Patricia Heidtman

Beth Nix

The present invention relates to a self-adhesive article comprising a non-random fabric of bundles of carbon fibres and a thermosetting epoxy resin composition. The self-adhesive article exhibits high surface adhesion and excellent dimensional stability at room temperature. The self-adhesive article is ideally suited to reinforce structural components, particularly vehicles or ancillary vehicle components. The structural components reinforced by the self-adhesive article exhibit improved impact and torsional strength.

Article of thermosetting epoxy resin composition and carbon fibre fabric, and reinforced structural component made therewith

A one-component thermosetting epoxy resin adhesive, including a) at least one epoxy resin A having on average more than one epoxide group per molecule; b) at least one latent hardener for epoxy resins; and c) at least one carboxylic acid selected from substituted or unsubstituted succinic acid and substituted or unsubstituted phthalic acid, wherein the epoxy resin adhesive contains 1.7 to 15 mmol of the at least one carboxylic acid per 100 g of epoxy resin adhesive, and the epoxy resin adhesive has a viscosity of more than 10 000 Pas at 25&#xb0; C.

One-component thermosetting epoxy adhesive with improved adhesion

Thermosetting epoxy resin compositions on the one hand at room temperature in the incompletely cured state exhibit extremely slight alteration in shape and on the other hand develop a high surface tack, and, moreover, in the fully cured state are of high impact strength and at the same time exhibits high adhesion, particularly to metallic substrates. These compositions are ideally suited to the production of self-adhesive reinforcing elements.

Thermosetting epoxy resin compositions useful as structural reinforcement or structural foam

A one-component heat-curing epoxy resin adhesive has at least one epoxy resin having an average of more than one epoxy group per molecule; at least one latent hardener for epoxy resins; and at least one carboxylic acid selected from substituted or unsubstituted adipic acid, substituted or unsubstituted succinic acid, substituted or unsubstituted phthalic acid, substituted or unsubstituted terephthalic acid, substituted or unsubstituted isophthalic acid, substituted or unsubstituted benzenetricarboxylic acid and substituted or unsubstituted nitrobenzoic acid, excluding 2-hydroxysuccinic acid and 2,3-dihydroxysuccinic acid as carboxylic acid, and wherein the epoxy resin adhesive contains 0.0015 to 0.04 mol of the at least one carboxylic acid per 100 g of the epoxy resin adhesive and the epoxy resin adhesive has a viscosity of 500-5000 Pas at 25&#xb0; C. The epoxy resin adhesive is notable for a very heat-resistant bond on particular metal substrates such as steel having a zinc-magnesium coating.

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Sterling Heights, MI, United States of America

John Hanley