Curable composition, treated backing, coated abrasive articles including the same, and methods of making and using the same
Assignee3M Innovative Properties Company
InventorsJunting Li, Ernest L. Thurber, Yuyang Liu
Life of this patent
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Abstract
A curable composition comprises from 45 to 80 percent by weight of epoxy resin preparable by reaction of epichlorohydrin with at least one of bisphenol A or bisphenol F, from 6 to 12 percent by weight of an at least trifunctional (meth)acrylate, from 5 to 45 percent by weight of a polythiol, from 0 to 10 percent by weight of dicyandiamide, 0.1 to 2 percent free-radical photoinitiator, 0.5 to 1 percent by weight of a 2-alkylimidazole, and from 0 to 5 percent of phenolic resin. The curable composition is useful for preparing treated backings that can be incorporated in coated abrasive articles and used to abrade a workpiece.
Claims23
1-18. (canceled)
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A coated abrasive article according to 19, wherein the abrasive layer comprises a make layer disposed on at least a portion of the treated backing, abrasive particles partially embedded in the make layer, and a size layer at least partially overlaying the make layer and abrasive particles.
A method of abrading a workpiece comprising:
- providing a coated abrasive article comprising an abrasive layer secured to a major surface of a treated backing, wherein the abrasive layer comprises abrasive particles retained in a binder wherein the treated backing comprises at least one of a presize layer, a saturant, or a subsize layer, or a tie layer that comprises a reaction product of components comprising, based on the total weight of components a) through g):
- a) from 45 to 80 percent by weight of epoxy resin preparable by reaction of epichlorobydrin with at least one of bisphenol A or bisphenol F;
- b) from 6 to 12 percent by weight of an at least trifunctional (meth)acrylate;
- c) from 5 to 45 percent by weight of a polythiol;
- d) from 0 to 10 percent by weight of dicyandiamide;
- e) 0.1 to 2 percent of free-radical photoinitiator;
- f) 0.5 to 1 percent by weight of 2-alkylimidazole;
- and
- g) 0 to 5 percent of phenolic resin;
- frictionally contacting at least a portion of the abrasive layer with at least a portion of a surface of the workpiece;
- and
- moving at least one of the coated abrasive article or the workpiece relative to the other to abrade at least a portion of the surface.
A method of making a coated abrasive article comprising:
- disposing a curable backing treatment precursor on at least a portion of a backing, the curable backing treatment precursor comprising components, based on the total weight of components a) through g):
- a) from 45 to 80 percent by weight of epoxy resin preparable by reaction of epichlorohydrin with at least one of bisphenol A or bisphenol F;
- b) from 6 to 12 percent by weight of an at least trifunctional (meth)acrylate;
- c) from 5 to 45 percent by weight of a polythiol;
- d) from 0 to 10 percent by weight of dicyandiamide;
- e) 0.1 to 2 percent of free-radical photoinitiator;
- f) 0.5 to 1 percent by weight of 2-alkylimidazole;
- and
- g) 0 to 5 percent of phenolic resin;
- and
- at least partially curing the curable backing treatment precursor to provide a treated backing;
- and
- securing an abrasive layer to a major surface of the treated backing, wherein the abrasive layer comprises comprising abrasive particles retained in a binder.
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Dependencies are inferred from the claim text.