Coated abrasive products employing nonabrasive diluent grains
AssigneeMinnesota Mining and Manufacturing Company
InventorsVernon M. Wald, Richard A. Masson, Fredrick D. Brown, David E. Broberg
Life of this patent
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Abstract
A coated abrasive article comprised of a blend of premium abrasive grains and nonabrasive diluent grains adhered to a backing material by a resinous binder. The article has an unexpected abrading efficiency, performing equal to, or superior to, a coated abrasive article containing only premium abrasive grains.
Claims20
A coated abrasive article comprising a backing member having adherently bonded thereto by a bonding material a volume of particles as a layer, said particles consisting essentially of (a blend) of premium and having a Knoop hardness less than 200, said coated abrasive article having at least the same abrasive performance as the same abrasive article with all of said volume of particles consisting only of particles of said premium abrasive grains.
A coated abrasive article comprising:
- (a) a backing material;
- (b) a of calcium carbonate-filled resole phenolic resin on one major surface of said backing material;
- (c) a of essentially the same grade comprising a blend of 20 to 50% by volume fused alumina-zirconia premium abrasive grains and 80 to 50% by volume gypsum nonabrasive diluent grains adhered to said backing material by said make coating;
- (d) a of resole phenolic resin containing cryolite grinding aid overlying said layer of particles;
- and
- (e) a of epoxy resin containing potassium fluoroborate grinding aid overlying said size coating;
- said coated abrasive article having at least the same abrasive performance as the same abrasive article with said volume of particles consisting only of fused alumina-zirconia premium abrasive grains.
A coated abrasive article comprising:
- (a) a polyester cloth backing material;
- (b) a make coating of calcium carbonate-filled resole phenolic resin on one major surface of said backing material;
- (c) a layer of a volume of particles of essentially the same grade comprising a blend of 20 to 50% by volume alpha alumina-based premium abrasive grains and 80 to 50% by volume gypsum nonabrasive diluent grains adhered to said backing material, by said make coating;
- (d) a size coating of resole phenolic resin containing cryolite grinding aid overlying said layer of particles;
- and
- (e) a supersize coating of epoxy resin containing potassium fluoroborate grinding aid overlying said size coating;
- said coated abrasive article having at least the same abrasive performance as the same abrasive article with said volume of particles consisting only of alpha alumina-based premium abrasive grains.
Dependencies are inferred from the claim text.