Coated abrasive containing a pressure-sensitive adhesive...

Details Coated abrasive containing a pressure-sensitive adhesive... Coated abrasive containing a pressure-sensitive adhesive...

B - Operations, Transporting

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B24D 3/00 (2006.01) B24D 11/00 (2006.01) C09J 7/02 (2006.01) C09J 131/04 (2006.01) C09J 133/04 (2006.01) C09J 133/24 (2006.01) C09K 3/14 (2006.01)

Patent

CA 2025430

This invention relates to coated abrasive products having a pressure-sensitive adhesive layer coatable from water. Many coated abrasive products, especially coated abrasive sheets and discs, are mounted on a support pad, sometimes called a back-up pad, during use. One means for securing the coated abrasive article to the support pad calls for a pressure-sensitive adhesive. Typically, the surface of the coated abrasive article not containing the abrasive grains will bear a layer of pressure-sensitive adhesive. For many years, pressure-sensitive adhesives have been coated fram organic solvent solutions onto the non-abrasive side of the coated abrasive article with excellent results. However, because recent governmental regulations require reductions in solvent emissions, the coated abrasive industry desires to eliminate all organic solvents from their coating operations. This invention provides a coated abrasive product having a backing bearing abrasive grains on one major surface thereof and a pressure-sensitive adhesive, coatable from water, on the other major surface thereof. The pressure-sensitive adhesive can be used to secure the coated abrasive to a support pad or back-up pad. The support pad provides the coated abrasive with the necessary foundation during abrading operations. The pressure-sensitive adhesives of this invention can adequately secure the coated abrasive to the support pad even at high rotation speeds and at high grinding pressures. Previously known pressure-sensitive adhesives for coated abrasives that are coatable from water were unable to provide this property.

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