B - Operations – Transporting – 24 – D
Patent
B - Operations, Transporting
24
D
117/27, 57/3
B24D 3/00 (2006.01) B24D 3/34 (2006.01) B24D 11/00 (2006.01)
Patent
CA 2017710
44252 CAN 1A ABSTRACT OF THE DISCLOSURE This invention relates to coated abrasive articles, and more particularly, to coated abrasive articles that can be adhered to abrading equipment by means of a pressure-sensitive adhesive. Coated abrasive aticles are used to abrade a wide variety of workpieces. Particles from the workpiece undergoing abrasion become lodged between the abrasive grains, thereby reducing the cutting ability of the coated abrasive, even though the abrasive grains are not worn. This loading, which substantially reduces the useful life of a coated abrasive article, has been addressed with laoding resistant coatings. There is a tendency for conventional loading resistant coatings to transfer from the grain-bearing surface of one coated abrasive disc to the pressure-sensitive adhesive surface of another coated abrasive disc when the discs are disposed in a package. If the loading resistant coating does transfer, it significantly reduces the adhesion characterisitcs of the pressure-sensitive adhesive. This invention provides a coated abrasive article comprising a backing bearing on one major surface thereof a layer of abrasive grains overcoated with a loading resistant coating and on the other major surface thereof a layer of pressure-sensitive adhesive. The loading resistant coating comprises a lithium salt of a fatty acid. It may also contain additives selected from the group consisting of surfactants, wetting agents, binders, anti-foaming agents, fillers, plasticizers, and mixtures thereof. The use of a lithium salt of a fatty acid significantly reduces the amount of transfer between the loading resistant coating of a first coated abrasive article and the pressure-sensitive adhesive layer of a second coated abrasive article disposed within the same package.
Peterson Scott W.
Schroeder Marvin J.
Minnesota Mining And Manufacturing Company
Smart & Biggar
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