Loading resistant coated abrasive
AssigneeNorton Company
InventorMohamed M. Ibrahim
Life of this patent
Estimating the term…
Abstract
Loading resistant coated abrasives can be made without the need for a supersize coating of metal stearates or any other material by incorporating phosphoric acids, partial esters of such acids, amine salts of such acids and partial esters, and/or quarternary ammonium salts with at least one long substituent group into amino resin or glue sizing adhesives used during the manufacture of the coated abrasives. Loading resistance equal or superior to that achieved with conventional zinc stearate supersized products can be achieved in this way.
Claims5
In a coated abrasive comprising a flexible backing, a plurality of abrasive grit particles dispersed over the area of at least one surface of said backing, and at least one layer of adhesive bond material adhering said abrasive grit particle to each other and to said backing, the improvement wherein the outermost layer of said adhesive bond material comprises:
- (1) animal glue, or a cured amino resin, or mixtures therof in an amount of at least 40% by weight of the total adhesive bond material in said outermost layer, exclusive of any filler;
- and
- (2) from 0.7 to 13 grams per square meter of the grit-covered surface of said coated abrasive of an additive soluble in the liquid from which the adhesive of part (1) was coated during the process of manufacture of said coated abrasive, said additive being selected from the group consisting of
- (a) phosphoric and condensed phosphoric acids and partial esters thereof,
- (b) amine salts of the acids in part (a),
- (c) tetraorganyl ammonium salts having at least one long organyl group containing at least eight carbon atoms, and
- (d) mixtures thereof.
Dependencies are inferred from the claim text.