Heat insulator and method of making it

US5389420A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Gerhard Sextl · Geiselbach, DE
• Roland Reuter · Darmstadt, DE
• Hans Strack · Alzenau, DE
• Peter Kleinschmit · Hanau, DE
• Rudolf Schwarz · Alzenau, DE

Key dates

• Filing date: Nov 30, 1992
• Grant date: Feb 14, 1995
• Expiry date: Nov 30, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31746
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A heat-insulator consisting of PA1 a) A finely distributed, powdery or fibrous substance, PA1 b) A microporous casing and PA1 c) A gas- and watertight, metal-free casing. The heat insulator is manufactured by optionally drying the powdery or fibrous substance, optionally bringing it into a microporous casing, optionally pressing it and then optionally drying it. The powdery substance is then brought with the microporous casing into a gas- and watertight, metal-free casing. This gas- and watertight casing is optionally evacuated and sealed.