# US 12,006,464 B2 · Shaped siliceous abrasive agglomerate with shaped abrasive particles, abrasive articles, and related methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,006,464 B2 - Document ID: US12006464B2 - Status: Granted - Kind: B2 - Application number: 16/976,548 - Filed: 2019-03-01 - Published: 2021-01-07 - Granted: 2024-06-11 - Earliest claimed: 2018-03-01 - Assignees: 3M Innovative Properties Company - Applicants: 3M Innovative Properties Company - Inventors: Taisiya Skorina; Negus B. Adefris - Web page: https://patentgrep.com/patent/US12006464B2 ## CPC - C09K 3/1418: {obtained by division of a mass agglomerated by sintering} - C09K 3/1436: {Composite particles, e.g. coated particles} - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE ## Abstract A shaped abrasive agglomerate particle includes a shaped abrasive particle bonded in a siliceous matrix. The siliceous matrix comprises a reaction product of an alkali silicate and a hardener. The abrasive agglomerate particles are useful in abrasive articles. Methods of making the shaped abrasive agglomerate particle and abrading a workpiece are also described. ## Claims ### Claim 1 A shaped abrasive agglomerate particle comprising shaped abrasive particles bonded in a siliceous matrix, wherein the siliceous matrix comprises a reaction product of at least an alkali silicate and a hardener, and wherein the shaped abrasive particles have a longest particle lineal dimension on a surface and a shortest particle dimension perpendicular to the longest particle lineal dimension, wherein the longest particle lineal dimension is at least twice the shortest particle dimension. ### Claim 2 A shaped abrasive agglomerate particle comprising shaped abrasive particles bonded in a siliceous matrix, wherein the siliceous matrix comprises a reaction product of at least an alkali silicate and a hardener, wherein at least one of the shaped abrasive particles or the shaped agglomerate particle has a sloping side wall, and wherein at least one of the shaped abrasive particles or the shaped agglomerate particle has an angle in a range from 95 degrees to 130 degrees between a first face and the sloping side wall. ### Claim 3 (depends on 1) The shaped abrasive agglomerate particle of claim 1, wherein at least one of the shaped abrasive particles or the shaped agglomerate particle has a frusto-pyramidal shape. ### Claim 4 (depends on 2) The shaped abrasive agglomerate particle of claim 2, wherein the shaped abrasive particles have a longest particle lineal dimension on a surface and a shortest particle dimension perpendicular to the longest particle lineal dimension, wherein the longest particle lineal dimension is at least twice the shortest particle dimension. ### Claim 5 (depends on 1) The shaped abrasive agglomerate particle of claim 1, wherein the shaped abrasive agglomerate particle has a longest agglomerate lineal dimension on a surface and a shortest agglomerate dimension perpendicular to the longest agglomerate lineal dimension, and wherein the longest agglomerate lineal dimension is at least twice the shortest agglomerate dimension. ### Claim 6 (depends on 1) The shaped abrasive agglomerate particle of claim 1, wherein the shaped abrasive particles are present in a range from 50 percent by weight to 95 percent by weight and the siliceous matrix is present in a range from five percent by weight to 50 percent by weight, based on the weight of the shaped abrasive agglomerate particle. ### Claim 7 (depends on 1) The shaped abrasive agglomerate particle of claim 1, wherein the shaped abrasive particles comprise alpha alumina. ### Claim 8 (depends on 1) The shaped abrasive agglomerate particle of claim 1, wherein the alkali silicate comprises at least one of lithium silicate, sodium silicate, or potassium silicate, and wherein the hardener comprises at least one of aluminum phosphate, aluminosilicate, fluorosilicate, Portland cement, synthetic cryolite, or a calcium silicate. ### Claim 9 (depends on 1) The shaped abrasive agglomerate particle of claim 1, wherein the hardener comprises an aluminosilicate, and wherein the siliceous matrix has a molar ratio of silicon to aluminum of up to 300:1. ### Claim 10 (depends on 1) A method of making a plurality of the shaped abrasive agglomerate particles of claim 1, the method comprising: filling a mold having a plurality of cavities with a dispersion comprising an alkali silicate, a hardener, the shaped abrasive particles, water, and optionally a rheology modifier; and heating the dispersion in the mold to provide the shaped abrasive agglomerate particles. ### Claim 11 (depends on 10) The method of claim 10, wherein a set temperature of any environment to which the shaped abrasive agglomerate particles are subjected is at or below 500° C. ### Claim 12 (depends on 1) An abrasive article comprising a plurality of the shaped abrasive agglomerate particles of claim 1 retained in a binder. ### Claim 13 (depends on 12) The abrasive article of claim 12, wherein the abrasive article is a coated abrasive article comprising a backing and the plurality of shaped abrasive agglomerate particles attached to the backing with a polymeric binder. ### Claim 14 (depends on 13) The abrasive article of claim 13, wherein the polymeric binder comprises a phenolic binder. ### Claim 15 (depends on 12) The abrasive article of claim 12, wherein the abrasive article comprises a nonwoven abrasive article or a bonded abrasive article. ### Claim 16 (depends on 12) A method of abrading a workpiece, the method comprising: contacting the workpiece with the abrasive article of claim 12, and moving the workpiece and the abrasive article relative to each other to abrade the workpiece. ### Claim 17 (depends on 1) The shaped abrasive agglomerate particle of claim 1, wherein the siliceous matrix comprises an amorphous polymeric ≡Si—O—Si(Al,P)≡ network. ### Claim 18 (depends on 1) The shaped abrasive agglomerate particle of claim 1, wherein the longest particle lineal dimension is up to 1600 micrometers. ### Claim 19 (depends on 1) The shaped abrasive agglomerate particle of claim 1, having a longest agglomerate lineal dimension of up to 5 millimeters. ### Claim 20 (depends on 1) The shaped abrasive agglomerate particle of claim 1, wherein the shaped abrasive particles and the shaped abrasive agglomerate particle have the same shape.