Adhesives suitable for use in bonding applications
AssigneesHenkel AG & Co. KGaA, Henkel IP & Holding GmbH
InventorsDarren Nolan, Nigel Fay, Eimear Fleming, Brendan Kneafsey, Rainer Wefringhaus, Wolfgang Weimar
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Abstract
The present invention relates to adhesives that are suitable for use in a broad variety of bonding applications. In particular, the present invention relates to adhesives that are suitable for use in polymer-to-metal, for example elastomer-to-metal, such as rubber-to-metal bonding applications, wherein the adhesives comprise at least one halogenated polyolefin, at least one epoxysilane having at least one terminal alkoxy silane group, at least one bis-silane, and optionally at lease one organic solvent.
Claims11
An article comprising an adhesive layer, comprising:
- i) at least one halogenated polyolefin having a weight average molecular weight of 200,000 to 400,000, wherein the halogen content ranges from 55 to 90 percent by weight, present in an amount in the range of 1 to 30 wt.-%, based on the weight of the adhesive;
- ii) at least one epoxysilane having at least one terminal alkoxy silane group wherein the epoxysilane is present in an amount of 0.2 to 5 wt.-%, based on the weight of the adhesive;
- iii) at least one bis-silane, wherein the bis-silane has two silicon atoms per molecule, wherein the two silicon atoms are linked with each other by a divalent linkage group and each silicon atom carries three additional substituents, wherein at least one of the three additional substituents is an alkyl or alkoxy residue, and the bis-silane is present in an amount of 0.1 to 2 wt.-%, based on the weight of the adhesive;
- iv) optionally at least one organic solvent, wherein the weight ratio of epoxysilane to bis-silane in the adhesive is from 1:0.2 to 1:0.8 wherein the adhesive layer is, disposed between (a) a polar elastomeric substrate selected from the group consisting of nitrile butadiene rubber, hydrogenated nitrile butadiene rubber and ethylene acrylic elastomers, and (b) a metallic substrate.
Dependencies are inferred from the claim text.