Manufacturing methods, based on non aqueous dispersion techniques, to produce spherical polyester particle size distributions and tailorable mean particle sizes

US6365315B1 · kind B1 · utility

Assignee

• Ticona LLC · US

Inventors

• Stefan Wulf · Rheydt, DE
• Alexandra Jacobs · Niedernhausen, DE
• Volker Mörs · Frankfurt, DE
• Toshio Shiwaku · Shizuoka, JP
• Benett Clayton Ward · Denver, US

Key dates

• Filing date: Oct 18, 2000
• Grant date: Apr 2, 2002
• Expiry date: Oct 18, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S524/908
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the production of spherical, polyester particles, wherein the particle size can be exactly adjusted in the range of 1 to 200 &mgr;m and a particle size distribution with a span (=d90−d10/d50)≦1.5, as well as the use of the produced particles for toner compositions in electrophotographic and direct printing systems and powder coatings.