Process for outgassing liquid-crystalline materials

US4699636A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Klaus Bofinger · Mühltal, DE
• Hans-Adolf Kurmeier · Seeheim-Jugenheim, DE
• Michael C. Romer · Rodgau, DE
• Jurgen Seubert · Darmstadt, DE

Key dates

• Filing date: Feb 14, 1986
• Grant date: Oct 13, 1987
• Expiry date: Feb 14, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2219/00
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Liquid-crystalline materials can be outgassed by thermal treatment under reduced pressure in a thin-layer evaporator or with additional ultrasonic treatment.