Supersize film forming resins on coated abrasives

Claim 1

A COATED ABRASIVE ARTICLE HAVING OUTSTANDING ABILITY TO ABRADE A STEEL SURFACE EFFECTIVELY UNDER HEAVY PRESSURE FOR EXTENDED PERIODS OF TIME WHILE RESISTING THE NORMALLY OCCURRING WELDING OF THE FRESHLY EXPOSED STEEL SURFACE TO THE ABRADING SURFACE THEREOF, SAID ARTICLE COMPRISING A SHEET BACKING, A HARDENED MAKE ADHESIVE AND A HARDENED SANDSIZE ADHESIVE FIRMLY BONDING ALUMINUM OXIDE GRANULES TO SAID BACKING, AND, AT THE EXPOSED ABRADING SURFACE OF SAID ARTICLE, A SUPERSIZED COATING WHICH DIFFERS IN COMPOSITION FROM SAID SANDIZE ADHESIVE AND WHICH CONSISTS ESSENTIALLY OF A HEAT-DECOMPOSABLE FILMFORMING ORGANIC POLYMER CONTAINING A CHEMICALLY BOUND SUBSTITUENT WHICH CAN FORM THE ANION OF AN ACID SELECTED FROM THE CLASSD OF HCL, HBR, AND H2S, SAID MADE AND SANDSIZE ADHESIVES BEING PRESENT IN SUCH QUANTITY THAT SAID SUPERSIZED COATING CONTRIBUTES ESSENTIALLY NOTHING TO THE MECHANICAL STRENGTH OF THE COATED ABRASIVE PRODUCT, SAID POLYMER BEING SELECTED FROM THE CLASS CONSISTING OF POLYVINYL, CHLORIDE; POLYVINYLIDENE CHLORIDE; VINYL CHLORIDE-VINYL ACETATE COPOLYMER; POLYVINYL BROMIDE; REACTION PRODUCT OF POLYEPICHLOROHYDRIN AND TRIMETHYLOL PROPANE: TOLUENE 2,4-DIISOCYANATE POLYMER: REACTION PRODUCT OF TETRACHLOROBISPHENOL A, 1,4,5,6,7-HEXACHLOROBICYCLO(2,2,1)-5-HEPTANE-2,3-DICARBOXYLIC ANHYDRIDE AND HEXAHYDROPHTHALIC ANHYDRIDE; REACTION PRODUCT OF 1-EPOXYETHYL3,4-EPOXYCYCLOHEXANE AND 1,4,5,6,7,7-HEXACHLOROBICYCLO(2,2,1)-5-HEPTANE-2,3-DICARBOCYCLIC ANHYDRIDE; CHLORINATED COUMARONE-INDENE RESIN; REACTION PRODUCT OF MERCAPTOSUCCINIC ACID: NEOPENTYL GLYCOL POLYESTER AND N,N''BISENTHYLENISOSEBACIMIDE; AND THIOKOL.