The disclosure relates to layers comprising a body having a thickness, T, comprising a curable composition comprising a polymerizable epoxy-acrylate resin composition and abrasive particles at least partially embedded in the polymerizable epoxy-acrylate resin composition, wherein the body includes a plurality of void spaces free of the curable composition extending into the body from the first major surface and the depth of the plurality of void spaces is at least 10 percent of thickness T. The disclosure also relates to cured compositions formed from such curable compositions and, in turn, abrasive articles made from such cured compositions as well as methods for making abrasive articles.

An annular grindstone includes a grindstone portion in which abrasive grains are fixed with a bonding material containing nickel and has a through hole at the center thereof. The grindstone portion has a laminated structure of a total of three or more layers in which a first layer and a second layer having a porous structure are alternately laminated on top of another along a penetrating direction of the through hole and both of outermost layers in the laminated structure which are exposed outside are the first layers.

The purpose of the present invention is to provide a grinding material which has a superior grinding rate and planarizing accuracy, with the grinding rate being less likely to be reduced over a relatively long period of time. The present invention is directed to a grinding material including a base, a grinding layer overlaid on a front face side of the base and including grinding grains and a binder for the grinding grains, and an adhesion layer overlaid on a back face side of the base, in which the grinding grains are diamond grinding grains, a wear quantity of the grinding layer as determined by a Taber abrasion test is no less than 0.03 g and no greater than 0.18 g, and, an Asker D hardness measured from a front face side of the grinding layer is no less than 80° and no greater than 98°.

A shaped abrasive particle including a body having a first major surface, a second major surface, and a side surface joined to the first major surface and the second major surface, and the body has at least one partial cut extending from the side surface into the interior of the body.

The present disclosure provides an abrasive article. The abrasive article includes a base. The abrasive article further includes a plurality of soft shaped abrasive particles distributed about the base.

Embodiments of the present disclosure relate to advanced polishing pads with tunable chemical, material and structural properties, and new methods of manufacturing the same. According to one or more embodiments of the disclosure, it has been discovered that a polishing pad with improved properties may be produced by an additive manufacturing process, such as a three-dimensional (3D) printing process. Embodiments of the present disclosure thus may provide an advanced polishing pad that has discrete features and geometries, formed from at least two different materials that include functional polymers, functional oligomers, reactive diluents, addition polymer precursor compounds, catalysts, and curing agents. For example, the advanced polishing pad may be formed from a plurality of polymeric layers, by the automated sequential deposition of at least one polymer precursor composition followed by at least one curing step, wherein each layer may represent at least one polymer composition, and/or regions of different compositions. Embodiments of the disclosure further provide a polishing pad with polymeric layers that may be interpenetrating polymer networks.

A method of making a coated abrasive article is disclosed. A backing has first and second opposed major surfaces. A make layer precursor is disposed on at least a portion of the first major surface. Magnetizable abrasive particles are disposed onto the make layer precursor while under the influence of an applied magnetic field. At least a majority the magnetizable abrasive particles extend away from the make layer precursor in an orientation substantially aligned with the applied magnetic field. Non-magnetizable particles are then disposed onto the make layer precursor while under the influence of the applied magnetic field. At least some of the non-magnetizable particles are disposed between the magnetizable abrasive particles. Then, the make layer precursor is at least partially cured to provide a make layer.

A grindstone that enables grinding, polishing, super-finish polishing by using the same grindstone, without clogging even if the grindstone is being used continuously, in which a grinding/polishing section for processing a workpiece has a honeycomb structure formed by arranging polygonal prisms with no clearance therebetween. The grindstone includes the grindstone columns consisting of abrasive grains and binder and having an axis in depth direction of grinding/polishing surface, which are disposed on intersections or wall portions of the honeycomb structure. Porous elastomer is disposed inside the honeycomb structure, thus making it possible to perform a super-finish polishing.

Abrasive disk sheet articles having raised islands coated with abrasive have a flexible disk polymer backing. The top flat surfaces of the raised islands are coated with a liquid controlled-thickness slurry mixture of abrasive particles and a polymeric adhesive by use of a magnetic precision-thickness coating-control font sheet having individual open holes that are slightly smaller than the respective raised islands. The magnetic coater font sheet is placed in flat-surfaced contact with the raised island surfaces where each individual font sheet open hole is aligned with a respective island surface. A magnet placed on the non-island surface of the disk polymer backing urges the magnetic coater font sheet into conformal contact with the island surfaces. A squeegee device moved along the font sheet fills and level coats the island tops with a uniform-thickness abrasive slurry mixture. After coating, the font sheet is removed and the abrasive slurry is solidified.

An abrasive article including a first abrasive body coupled to a substrate, the first abrasive body having abrasive particles including a superabrasive and a bond material including a vitreous material and a second abrasive body coupled to the substrate, the second abrasive body having abrasive particles including a superabrasive and a bond material including at least one non-vitreous phase material, and as wear rate differential between the first abrasive body and second abrasive body of at least 0.08 cc.