Magnetizable abrasive particle and method of making the same

US11597860B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Adam D. Miller · Windom, US
• Sergei A. Manuilov · Stillwater, US
• Naiyong Jing · Woodbury, US
• Taisiya Skorina · Woodbury, US
• Aaron K. Nienaber · Maplewood, US
• Joseph B. Eckel · Vadnais Heights, US
• Thomas J. Anderson · Cottage Grove, US
• Thomas J. Nelson · Morgantown, US
• Mark A. Lukowski · Windom, US
• Louis S. Moren · White Bear Lake, US
• Don V. West · Okabena, US

Key dates

• Filing date: Oct 24, 2017
• Grant date: Mar 7, 2023
• Expiry date: Jul 6, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/606
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Magnetizable abrasive particles are described comprising ceramic particles having outer surfaces comprising a coating of unsintered polyion and magnetic particles bonded to the polyion. In favored embodiments, the magnetic particles have a magnetic saturation of at least 10, 15, 20, 25, 30, 35, 40, 45 or 50 emu/gram. In another embodiment, an abrasive article is described comprising a plurality of magnetizable abrasive particles as described herein retained in a binder material. Also described are method of making magnetizable abrasive particles and methods of making an abrasive article comprising magnetizable abrasive particles.