Ceramic-coated corundum abrasive grain

US4472173A · kind A · utility

Assignee

• Dynamit Nobel GmbH · DE

Inventors

• Klaus Bruning · Bensberg, DE
• Gerhard Rehfeld · Aachen, DE

Key dates

• Filing date: Nov 9, 1982
• Grant date: Sep 18, 1984
• Expiry date: Nov 9, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K3/1436
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

In corundum abrasive grain which is ceramically coated with ground frit, a binder and fine grain highly abrasive material for the purpose of improving adhesion of the abrasive grain in its processing to resin-bonded abrasives and their use in wet grinding. The fine grain material forms from 1 to 5 weight percent of the untreated corundum grain and ranges in size from 10 to 50 microns, which corresponds to from 1 to 10 percent of the average diameter of the initial grain.