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US 5,667,227 AGranted
Ultraviolet radiation cured gasket coating
AssigneeDana Corporation
InventorBrent R. Boldt
Life of this patent
Estimating the term…
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.
Claims13
A gasket having a coating layer deposited thereon comprising:
- a gasket body having a top and a bottom surface, and
- a coating layer deposited on at least one of said top and bottom surfaces, said coating layer being formed by ultraviolet radiation curing a coating composition of between about 50 and about 100 parts by weight of an aromatic urethane acrylic oligomer, between about 30 and about 55 parts by weight of isobornyl acrylate monomer, between about 3 and about 10 parts by weight of a photoinitiator for catalyzing rapid polymerization of said coating composition, and between about 0.5 and about 2 parts by weight of a wetting agent to release air from said coating composition, wherein the total parts by weight is between about 146 and about 162 and wherein the total cure time of said coating composition required by ultraviolet radiation is less than 20 seconds.
Dependencies are inferred from the claim text.