Process for the preparation of polymer powders by spray drying

US4794167A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Christian Lindner · Bensheim, DE
• Edwin Roth · Oberharmersbach, DE
• Otto Koch · Leichlingen, DE
• Hans-Eberhard Braese · Cologne, DE
• Pol Bamelis · Overath, DE

Key dates

• Filing date: Nov 27, 1987
• Grant date: Dec 27, 1988
• Expiry date: Nov 27, 2007

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2982
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for the preparation of polymer powders from polymer dispersions by feeding a polymer dispersion continuously into an atomization apparatus and separately therefrom but at the same time also introducing a liquid agent, the dispersion and the liquid agent being completely mixed within at the most one second and the mixture being immediately thereafter dried with evaporation of the volatile constituents to form a powder composed of particles having an average diameter of from 0.05 to 1 mm, and the polymer powders prepared by this process.