Core-shell particles and preparation and use thereof

US6337131B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Robert Rupaner · Ludwigshafen, DE
• Reinhold J. Leyrer · Schifferstadt, DE
• Peter Schuhmacher · Mannheim, DE

Key dates

• Filing date: Apr 26, 1999
• Grant date: Jan 8, 2002
• Expiry date: Apr 26, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2998
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed are core-shell particles, whose core and shell materials are capable of forming a two-phase system, the shell material being filmable, the core being essentially form-stable under shell-filming conditions and being only very minimally swellable by the shell material, if at all, the cores having a monodisperse size distribution, and there being a difference between the refractive indices of the core material and of the shell material of at least 0.001. Also disclosed are the preparation of the core-shell particles and their use for preparing effect colorants.