Process for modifying the surface polarity of rubber substrates
AssigneeHenkel AG & Co. KGaA
InventorsAlessio Monesi, Eleonora Salmoiraghi, Marco Signorile, Giorgio Zaffaroni
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Abstract
The present invention relates to a process for modifying the surface polarity of elastomeric rubber substrates to facilitate their cold bonding to other rubber substrates or non-elastomeric substrates of a different material, preferably metal, by chlorinating the elastomeric rubber substrate surface by treatment with a chloride-containing composition and a peroxymonosulfate-containing composition. Further aspects relate to the thus-obtained surface-modified rubber substrates, processes of bonding them to other substrates by use of an adhesive, as well as the thus-obtained bonded substrates.
Claims20
A process of modifying a surface of an elastomeric rubber substrate, comprising steps of:
- (a) applying a first composition and a second composition to an elastomeric rubber substrate surface, wherein the first composition is an aqueous composition comprising chloride (Cl−), and the second composition is an aqueous composition comprising peroxymonosulfate;
- (b) optionally applying a third composition comprising activated carbon;
- and
- (c) incubating the first and second compositions, and the third composition if present, on the elastomeric rubber substrate surface for a time period and under conditions producing chlorination of the elastomeric rubber substrate surface.
Dependencies are inferred from the claim text.