Coated abrasive material is provided having a supersize layer thereon which improves grinding. This layer comprises an elastomeric material having substantial residual unsaturation and an active solid, particulate grinding aid.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of copending application Ser. No. 141,666 filed May 10, 1971 which was a continuation-in-part of application Ser. No. 47,786 filed June 19, 1970, both now abandoned.
An elastic grinding element for form-true grinding including a supporting layer of elastomer material and an adhesive grit layer bound to the supporting layer and having an active grinding surface made of a hardened mixture of binder and abrasive grit. The process for making the grinding element includes providing a mold having a shape constructed to produce a desired shape for the grinding element, putting the mixture of binder and abrasive grit and the elastomer material in the mold, and accelerating the mixture of binder and abrasive grit and the elastomer material while in the mold.
Abrasive products and methods of producing such products are described. The resin systems utilized are particularly suited to use in the manufacture of coated adhesive products. The coated abrasive products have a plurality of resin layers. The products have at least one layer comprised of an electron curable resin and at least one layer comprised of a heat curable resin. The products may include both electron and heat curable resins combined in a single layer.
A coating composition which forms a peelable coating for protecting surfaces of an object from the outside elements. The coating composition includes a latex of rubber particles and a UV absorber, wherein the rubber particles are present from about 35 to about 50 weight percent in the coating composition. The coating composition may also include from about 0.5 to about 4 weight percent of an antioxidant; from about 0.003 to about 0.03 weight percent of a biocide; from about 0.03 to about 0.08 weight percent of a defoamer; from about 0.07 to about 0.40 weight percent of a thixotropic agent; and a rust inhibitor, wherein all weight percents are based on the total weight of the coating composition. The method of using the composition includes coating the surface with a layer of the above-described coating composition and allowing the layer of coating composition to dry and form a coating which is capable of being peeled from the object.
An abrasive filament, a cloth or non-woven made of the filament and an abrasive device, e.g., sanding disk, incorporating the fabric, cloth or non-woven and methods of producing the same are disclosed. The filament has an outer surface to which plural small size particles of an abrasive material are secured. The filament is formed from a mass of a molten polymer material, e.g., nylon, that has been extruded through a small diameter opening to form a hot elongated filamentary body. The abrasive particles, e.g., grit, are applied as a cloud or spray to the outer surface of the hot elongated filamentary body, whereupon they adhere to that surface and remain permanently secured thereto.
Coated abrasives provided with a coating comprising a grinding aid and a binder resin are particularly effective when the grinding aid is an halogenated hydrocarbon.
