US 12,269,982 B2
Magnetically assisted disposition of magnetizable abrasive particles
Aaron K. Nienaber, Maplewood, MN (US); Joseph B. Eckel, Vadnais Heights, MN (US); Thomas J. Nelson, Woodbury, MN (US); Brian D. Goers, Minneapolis, MN (US); Samad Javid, Woodbury, MN (US); Ronald D. Jesme, Plymouth, MN (US); Badri Veeraraghavan, Woodbury, MN (US); and Sheryl A Vanasse, Spring Valley, WI (US)
Assigned to 3M Innovative Properties Company, St. Paul, MN (US)
Appl. No. 16/479,738
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Jan. 10, 2018, PCT No. PCT/US2018/013067
§ 371(c)(1), (2) Date Jul. 22, 2019,
PCT Pub. No. WO2018/136269, PCT Pub. Date Jul. 26, 2018.
Claims priority of provisional application 62/449,312, filed on Jan. 23, 2017.
Prior Publication US 2021/0332277 A1, Oct. 28, 2021
Int. Cl. C09K 3/14 (2006.01); C23C 14/35 (2006.01); C23C 26/00 (2006.01)
CPC C09K 3/1409 (2013.01) [C23C 14/35 (2013.01); C23C 26/00 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method of making an abrasive article, the method comprising:
providing a tool that has a first portion that comprises a first material and a second portion that comprises a second material, wherein the second material differs from the first material, wherein the tool is disposed adjacent a magnet and the magnet subjects the tool to a magnetic field, and wherein the first material and the second material are provided such that the magnetic field is relatively stronger at and adjacent the first portion relative to the magnetic field at and adjacent the second portion;
positioning a surface of an abrasive article backing adjacent to the tool so as to be subject to the magnetic field, wherein the surface of the abrasive article backing is coated with a first curable binder; and
disposing magnetizable abrasive particles on the surface, wherein the magnetizable abrasive particles are attracted to an area on the surface adjacent the first portion where the magnetic field is relatively stronger so as to dispose each of the attracted magnetizable particles on the surface adhered to the first curable binder to provide for at least one of a desired orientation, placement and alignment of a majority of the magnetizable abrasive particles on the surface of the abrasive article backing.