Moulded bodies consisting of core-shell particles

US7241502B2 · kind B2 · utility

Assignee

• Merck Patentgesellschaft · DE

Inventors

• Ralf Anselmann · Munster, DE
• Holger Winkler · Darmstadt, DE
• G. P. Hellmann · Mainz, DE
• Tillmann Ruhl · Griesheim, DE
• Günther Vulpius · Riedstadt, DE
• Harald Dörr · Messel, DE

Key dates

• Filing date: Aug 21, 2002
• Grant date: Jul 10, 2007
• Expiry date: Aug 21, 2022

Classification

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

Abstract

The invention relates to mouldings having an optical effect which essentially consist of core/shell particles whose shell forms a matrix and whose core is essentially solid and has an essentially monodisperse size distribution, where a difference exists between the refractive indices of the core material and of the shell material. The mouldings are characterized in that they are obtainable by a process in which the core/shell particles are heated to a temperature at which the shell is flowable, and the flowable core/shell particles are subjected to the action of a mechanical force.