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Assignee3M Innovative Properties Company
InventorsErnest L. Thurber, Eric G. Larson, Gregg D. Dahlke, Robert J. DeVoe, Alan R. Kirk, Mark R. Meierotto, Roy Stubbs
Estimating the term…
The present invention involves the use of powder coating methods to form coated abrasives. In one embodiment, the powder is in the form of a multiplicity of binder precursor particles comprising a radiation curable component. In other embodiments, the powder comprises at least one metal salt of a fatty acid and optionally an organic component that may be a thermoplastic macromolecule, a radiation curable component, and/or a thermally curable macromolecule. In either embodiment, the powder exists as a solid under the desired dry coating conditions, but is easily melted at relatively low temperatures and then solidified also at reasonably low processing temperatures. The principles of the present invention can be applied to form make coats, size coats, and/or supersize coats, as desired.
A powder comprising a radiation curable component that is flowable at a temperature in the range from about 35° C. to about 180° C. containing at least one polyfunctional, radiation curable monomer and at least one polyfunctional, radiation curable macromolecule selected from an oligomer, a polymer, and a combination of at least one oligomer and at least one polymer, wherein the weight ratio of the monomer to the macromolecule is in the range from about 1:10 to about 10:1.
A powder, comprising a radiation curable component that is a solid at temperatures below about 35° C. and is fluidly flowable at a temperature in the range from about 35° C. to about 180° C. and containing at least one monomer selected from the group consisting of (meth)acrylamide functional polyesters, (meth)acrylate-functional esters of aromatic dicarboxylic acids, (meth)acrylate-functional amides of aromatic dicarboxylic acids, and cyanate esters, and at least one macromolecule selected from the group consisting of cyanate ester oligomers, mixtures of cyanate esters and epoxy resins, and acrylamidomethyl novolaks.
Dependencies are inferred from the claim text.