Ultraviolet radiation curable gasket coating compositions
AssigneeDana Corporation
InventorBrent R. Boldt
Life of this patent
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Abstract
A formulation for a resilient gasket coating which is curable by ultraviolet radiation without emitting fumes into the surrounding environment. Different portions of the coating are cured by successive exposure to two different wavelengths of ultraviolet radiation during a continuous in-line process. The first wavelength cures an inner portion of the coating and bonds the coating to the substrate. The second wavelength cures a coating surface. The formulation permits ultraviolet curing of thicker pigmented coatings than have been previously known.
Claims9
A coating composition comprising:
- a mixture having from 50 to 100 parts by weight of an aromatic urethane acrylic oligomer, from 30 to 55 parts by weight of isobornyl acrylate monomer, from 3 to 10 parts by weight of at least one photoinitiator selected from the group consisting of 1-phenyl-2-hydroxy-2-methyl-1-propanone, benzophenone and alpha, alpha-dimethoxy-alpha-phenyl acetophenone, from 0.01 to 0.6 parts by weight iron (III) oxide, and from 0.5 to 2 parts by weight of polydimethylsiloxane, wherein the total parts by weight is between 146 to 162 and the total cure time required by ultraviolet radiation is between 1 and 4 seconds.
A coating composition comprising:
- a mixture having about 62 percent of aromatic urethane acrylic oligomer, about 29 percent of isobornyl acrylate monomer, about 2 percent of trimethylopropane ethoxy triacrylate monomer, about 5 percent of 1-phenyl-2-hydroxy-2-methyl-1-propanone, about 1 percent of benzophenone, about 1 percent of polydimethylsiloxane, about 0.03 percent of iron oxide magnetite, and about 0.3 percent of iron (III) oxide, wherein all percent being weight percent and the total ultraviolet cure time required is between 1 and 4 seconds.
A coating composition comprising:
- a mixture having from 50 to 100 parts by weight of an aromatic urethane acrylic oligomer, from 30 to 55 parts by weight of isobornyl acrylate monomer, from 3 to 10 parts by weight of at least one photoinitiator selected from the group consisting of 1-phenyl-2-hydroxy-2-methyl-1-propanone, benzophenone and alpha, alpha-dimethoxy-alpha-phenyl acetophenone, and from 0.5 to 2 parts by weight of polydimenthylsiloxane, wherein the total parts by weight is between 146 to 162 and the total cure time required by ultraviolet radiation is between 1 and 4 seconds.
Dependencies are inferred from the claim text.