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US 4,225,473 AGranted
Alkyd-monomer high-solids coating process
AssigneeE. I. Du Pont de Nemours and Company
InventorPhilip Heiberger
Life of this patent
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Abstract
A high-solids coating composition containing an unsaturated fatty acid alkyd resin, an alkyl dimethacrylate or trimethacrylate monomer, a protected cobalt oxime catalyst, and a polar solvent is mixed with a peroxide just before application to improve cure.
Claims4
A process of applying a coating composition to a substrate by spraying and crosslinking and polymerizing wherein said coating composition comprises
- an unsaturated fatty acid alkyd resin,
- an alkyl dimethacrylate or trimethacrylate monomer,
- a cobalt salt effective as a catalyst for the oxidative crosslinking of the alkyd resin and for initiating vinyl polymerization,
- a complexing agent to block the cobalt catalyst, and
- a polar solvent;
- wherein the coating composition contains by weight, based on the alkyd resin plus the methacrylate monomer, at least about 50% of the alkyd resin, about from 10 to 40% by weight of the methacrylate monomer, and at least about 10% polar solvent;
- and wherein said process comprises adding a peroxide to the coating composition during spraying of the composition on the substrate to enhance oxidative crosslinking of the alkyd resin and subsequent polymerization of the methacrylate monomer.
4 more elements
Dependencies are inferred from the claim text.