Manufacture of fibrids from poly(amide-imide) resins

US4187143A · kind A · utility

Assignee

• BASF SE

Inventors

• Bruno Sander · Ludwigshafen, DE
• Kurt Scherling · Hemsbach, DE
• Rolf Steinberger · Schifferstadt, DE
• Eckhard Ropte

Key dates

• Filing date: Sep 9, 1977
• Grant date: Feb 5, 1980
• Expiry date: Sep 9, 1997

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/298
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Fibrids are prepared by introducing a solution of a polymer into a liquid precipitation medium while exposing it to shearing forces. A poly(amide-imide) resin solution is admixed with a solvent which is miscible with the resin solvent but which is a non-solvent for the resin itself.