3m Innovative Properties Company

Minnesota Mining and Manufacturing Company

Condea Vista Company

3m Innovative Property Company

Dwight D Erickson

John T Boden

Scott R Culler

Negus B Adefris

John D Haas

Dennis G Welygan

Anatoly Z Rosenflanz

Charles J Studiner, Iv

Mark G Schwabel

Thomas Edward Wood

Edward J Woo

Thomas J Nelson

Aaron K Nienaber

Joseph B Eckel

Pingfan Peter Wu

William P Wood

Michael John Annen

Travis L Potts

Brian G Koethe

Jaime A Martinez

Maiken Givot

Ann M Hawkins

Yuyang Liu

Carlos A Barrios

Junting Li

Larry D Monroe

Adam D Miller

Melissa C Schillo-Armstrong

Deborah J Eilers

Jing Zhang

David M Wilson

Loc X Van

Sergei A Manuilov

Robinette S Alkhas

David A Barclay

Brett A Beiermann

Daniel A Billig

Lewis B Decker, Jr

Caroline E Morel

Scott A Baum

Laura M Lara Rodriguez

Adam D Milller

Monika E Frendt

Victor A Cárdenas

Charles J Iv Studiner

The disclosure relates to, among other things, abrasive particles comprising a microparticulate layer disposed on at least a portion of the outer surface of the abrasive particles, wherein the microparticulate layer comprises microparticles dispersed in a binder and the abrasive particles are shaped abrasive particles; abrasive articles comprising such abrasive particles, including coated abrasive articles, non-woven abrasive articles, and bonded abrasive articles; and methods of making those articles.

Abrasive article with microparticle-coated abrasive grains

The disclosure relates to an abrasive article comprising: a fabric substrate comprising strands forming first void spaces between the strands; a laminate joined to the fabric substrate; a cured resin composition joined to the laminate opposite the fabric substrate; abrasive particles joined to the cured resin composition; and a plurality of second void spaces extending through the laminate coinciding with first void spaces in the fabric substrate. The disclosure also relates to methods of making such abrasive articles.

Abrasive article

A bonded abrasive article includes elongate shaped abrasive particles. The elongate shaped abrasive particles comprise an elongate shaped ceramic body having opposed first and second ends joined to each other by at least two longitudinal sidewalls. At least one of the at least two longitudinal sidewalls is concave along its length. At least one of the first and second ends is a fractured surface.

Bonded abrasive article including elongate shaped abrasive particles

A magnetizable abrasive particle is presented. The magnetizable abrasive particle has a ceramic particle having an outer surface. The magnetizable abrasive particle also has a magnetic coating layer applied to the outer surface of the ceramic particle prior to sintering. The sintered magnetizable particle is responsive to a magnetic field.

Magnetizable abrasive particle and method of making the same

Abrasive particles comprising shaped abrasive particles each having a sidewall, each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a sidewall and having a maximum thickness, T; and the shaped abrasive particles further comprising a plurality of grooves on the second face.

Production tool to make abrasive particles with grooves

An elongate shaped abrasive particle comprises an elongate shaped ceramic body having opposed first and second ends joined to each other by at least two longitudinal sidewalls. At least one of the at least two longitudinal sidewalls is concave along its length. At least one of the first and second ends is a fractured surface. Methods of making elongate shaped abrasive particles and abrasive articles including them are also disclosed.

Elongate shaped abrasive particles, methods of making the same, and abrasive article including the same

A method of making elongated abrasive particles includes five steps. Step 1) includes providing a mold having parallel linear grooves, partially interrupted at predetermined intervals by transverse obstructions. Step 2) includes filling the parallel linear grooves with a flowable abrasive particle precursor composition. Step 3) includes at least partially drying the flowable abrasive particle precursor composition to form an at least partially dried abrasive particle precursor composition. Step 4) includes separating that composition from the mold, thereby forming elongated precursor abrasive particles having a shape corresponding to portions of the parallel linear grooves disposed between the transverse obstructions. At least one of the first and second opposite ends of the elongated precursor abrasive particles comprises both a molded portion and a fractured portion. Step 5) converts the elongated precursor abrasive particles into elongated abrasive particles. Elongated abrasive particles preparable by the method and abrasive articles containing them are also disclosed.

Elongated abrasive particles, method of making the same, and abrasive articles containing the same

Shaped abrasive particles each having a sloping sidewall. Each of the shaped abrasive particles containing alpha alumina and having a first face and a second face separated by a thickness, t. The shaped abrasive particles further having a draft angle &#x3b1; between the second face and the sloping sidewall, and the draft angle &#x3b1; is between about 95 degrees to about 125 degrees.

Shaped abrasive particles with a sloping sidewall

A method of making shaped abrasive particles including forming an abrasive flake comprising a plurality of precursor shaped abrasive particles and a frangible support joining the precursor shaped abrasive particles together; transporting the abrasive flake through a rotary kiln to sinter the abrasive flake; and breaking the sintered abrasive flake into individual shaped abrasive particles. The method is useful to make small shaped abrasive particles having insufficient mass to be efficiently individually sintered in a rotary kiln without joining two or more of the shaped abrasive particles together.

Shaped abrasive particles and method of making

A method of making sintered abrasive particles includes passing alumina precursor particles through a flame under conditions such that they are converted to alpha alumina. The precursor particles comprise a precursor of alpha alumina and have an average particle size of less than or equal to 500 microns. Sintered abrasive particles have a cellular microstructure comprising alpha alumina crystal grains of alpha alumina having a maximum dimension of less than about 3 microns are also disclosed. The sintered abrasive particles have an average particle size of less than or equal to 500 microns, and are essentially free of seed particles and alpha alumina grain size modifiers. Abrasive articles comprising a binder and a plurality of the sintered abrasive particles are also disclosed.

Sintered abrasive particles, method of making the same, and abrasive articles including the same

Shaped abrasive particles comprising alpha alumina and having a cross-sectional shape along a longitudinal axis of the shaped abrasive particles, the cross-sectional shape comprising a non-circular cross-sectional plane, and the shaped abrasive particles comprise an Average Roundness Factor of between about 15% to 0%.

Shaped abrasive particles with low roundness factor

A method includes: providing a mold having a plurality of mold cavities, wherein each mold cavity is bounded by a plurality of faces joined along common edges; filling at least some of the mold cavities with a sol-gel composition that includes a release agent dispersed therein; at least partially drying the sol-gel composition thereby forming shaped ceramic precursor particles; calcining at least a portion of the shaped ceramic precursor particles to provide calcined shaped ceramic precursor particles; and sintering at least a portion of the calcined shaped ceramic precursor particles to provide ceramic shaped abrasive particles. A sol-gel composition, shaped ceramic precursor particles, and ceramic shaped abrasive particles associated with practice of the method are also disclosed.

Method of making ceramic shaped abrasive particles, sol-gel composition, and ceramic shaped abrasive particles

Abrasive article with shaped abrasive particles with grooves

Growing community of inventors

Oakdale, MN, United States of America

Dwight D Erickson