High magnesium surface concentration nanocalcite composites

US10035909B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• William J. Schultz · North Oaks, US
• Mary I. Buckett · Woodbury, US
• Peter D. Condo · Lake Elmo, US
• Douglas P. Goetz · Windom, US
• Chad A. Haraldson · Apple Valley, US
• Mark McCormick · Windom, US
• Wendy L. Thompson · Roseville, US
• Steven J. Pachuta · Eagan, US

Key dates

• Filing date: Dec 17, 2009
• Grant date: Jul 31, 2018
• Expiry date: Jun 23, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K2003/265
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Compositions comprising surface-modified calcite nanoparticles dispersed in a curable resin and to coatings and fibrous composites incorporating such compositions are described. The nanocalcite particles have a high magnesium to calcium surface concentration ratio. The surface-modifying agents include a binding group ionically associated with the nanoparticles, and a compatiblizing segment compatible with the curable resin. The surface-modifying agent may also include a reactive group capable of reacting with the curable resin. Methods of preparing nanocalcite composites, and coatings and fibrous composites prepared from such nanocalcite composites are also described.