An abrasive for planarization of glass substrates for hard discs comprising abrasive grains mainly composed of rare earth oxides containing cerium oxide, wherein the abrasive grains has a cerium oxide/total rare earth oxide ratio of 95 wt %.

An abrasive includes an alumina-based fiber bound by a matrix resin which contains diamond abrasive grains therein, and a diamond abrasive grain layer provided on the surface of the bound fiber. The abrasive is formed into, for example, a flat plate having a thickness in a range of 0.45 to 1.2 mm, and the diamond abrasive grain layer is provided on at least any one of opposite surfaces of the bound fiber. Flat filaments having a ratio of a long axis to a short axis of the cross-sectional shape t...

An abrasive comprising at least the following components (A) and (B): (A) cerium-containing abrasive grains having an average particle size of from 0.5 to 5.0 .mu.m; and (B) particles having an average particle size of from 0.01 to 0.3 .mu.m, which are particles of at least one member selected from the group consisting of aluminum oxide, silicon dioxide, zirconium oxide, titanium oxide, silicon nitride and manganese oxide.

An abrasive is produced by crushing a cured product of a phenol resin composition into particles, and washing with water and drying the particles. The phenol resin composition may comprise as principal constituents a phenol resin and an organic filler, or a phenol resin, an organic filler and an inorganic filler.

A flowable, granular abrasive material and method of manufacture thereof. The material is comprised of at least one abrasive grain selected from aluminum oxide, silicon carbide, cubic boron nitride and/or diamond and has a organic or inorganic coating comprised of a binder and an abrasive filling material in the amounts of 0.5 to 8% and 1 to 15% by weight, respectively. The filling material may include sulfides, phosphates, carbonates, halogenides, and/or sulfide-, carbonate- and/or halogenide-c...

A flowable, granular abrasive material and method of manufacture thereof. The material is comprised of at least one abrasive grain selected from aluminum oxide, silicon carbide, cubic boron nitride and/or diamond and has a organic or inorganic coating comprised of a binder and an abrasive filling material in the amounts of 0.5 to 8% and 1 to 15% by weight, respectively. The filling material may include sulfides, phosphates, carbonates, halogenides, and/or sulfide-, carbonate- and/or halogenide-c...

The invention provides a method and apparatus for making an abrasive product comprising providing a substantially horizontally deployed flexible backing having a first surface bearing an at least partially cured primer coating and an opposite second surface; providing a dry flowable particle mixture comprising abrasive particles and particulate curable binder material; depositing a temporary layer comprising said particle mixture on the at least partially cured primer coating of the first surfac...

An abrasive tool comprising of a base portion (2), having a foam layer (3) affixed to the abrasive tool base portion, and a plastic film layer (4) affixed, bonded or glued to the foam layer. This tool is adapted to receive an abrasive material layer (5) or sand paper or other abrasive material having a pressure sensitive adhesive applied to one side of the abrasive material, to allow said abrasive material to be stuck and affixed to the abrasive tool. The abrasive tool may be hand operated, or o...

An abrasive article with abrasive grain such as corundum, a binder which is a hardenable organic or inorganic system, for example plastic, such as phenol resin, and grinding-active fillers, as well as an abrasive with abrasive grain such as corundum, a binder which is a hardenable organic or inorganic system, for example plastic, such as phenol resin, and grinding-active fillers. The abrasive compound of the abrasive consisting of abrasive grain, binder and the fillers is placed on a flexible su...

A direct-coated sponge abrasive material bearing a releasable securing means comprising one part of a two part hook and loop attachment system is provided.