Method of forming rubber-metal composites
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsRajat K. Agarwal, William E. Fristad, Gregg W. Rossier, Roman M. Skikun
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Abstract
A film of a polymer or polymer precursor such as an epoxy resin is autodeposited on an active metal surface and then used to form an adhesive bond directly between the metal surface and the surface of a rubber substrate. Excellent adhesion of the metal to the rubber is obtained without the need to either phosphate the metal surface or use a primer or adhesive other than the autodeposited coating.
Claims18
A method of forming a rubber-metal composite comprising autodepositing a coating comprised of a resin reactive with an uncured thermosettable rubber formulation onto a metallic substrate surface, substantially completely curing said autodeposited coating, bringing the cured autodeposited coating into direct contact with the uncured thermosettable rubber formulation, and curing the thermosettable rubber formulation, said rubber-metal composite being characterized by the absence of a separate adhesive layer.
A method of forming a rubber-metal composite comprising autodepositing a coating comprised of a reactive resin directly onto a metallic substrate surface, said resin comprising functional groups reactive with functional groups of an uncured thermosettable rubber formulation, substantially completely curing said autodeposited coating, bringing the cured autodeposited coating into direct contact with said uncured thermosettable rubber formulation, and curing the uncured thermosettable rubber formulation, said rubber-metal composite being characterized by the absence of:
- a separate adhesive layer and a phosphate layer.
A method of forming a rubber-metal composite comprising:
- a) autodepositing a coating comprised of a resin reactive with a thermosettable rubber formulation onto a metallic substrate surface, said resin being selected from the group consisting of phenolic resins, phenolic novolak resins, styrene/butadiene-copolymers, polyacrylates, acrylic co-polymers, polyvinyl chloride, vinyl chloride/vinylidene chloride-copolymers and mixtures of phenolic resins and phenolic novolak resins;
- b) substantially completely curing said autodeposited coating,
- c) bringing the cured autodeposited coating into direct contact with the thermosettable rubber formulation, and
- d) curing the thermosettable rubber formulation, said rubber-metal composite being characterized by the absence of a separate adhesive layer.
Dependencies are inferred from the claim text.