Microcapsules

US5236782A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gunter Klug · Langenfeld, DE
• Norbert Weimann · Leverkusen, DE
• Josef Vogel · Horw, CH

Key dates

• Filing date: Jul 16, 1991
• Grant date: Aug 17, 1993
• Expiry date: Jul 16, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2985
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Microcapsules which can be prepared at low temperatures contain walls composed of the product of an interface polyaddition and/or interface polycondensation reaction between a hydroxylamine and at least one component which is reactive with amino and alcohol groups. These microcapsules are advantageously used in the production of carbonless copying paper and thermal paper.