Process for strengthening and sealing geological formations

US4761099A · kind A · utility

Assignees

• BAYER HEALTHCARE LLC · DE
• Bergwerksverband GmbH · DE

Inventors

• Max Mann · Odenthal, DE
• Manfred Kapps · Bensberg, DE
• Frank Meyer · Essen, DE
• Hans Mehesch · Essen, DE
• Wolfgang Cornely · Gladbeck, DE
• Bernhard Maidl · Bochum, DE
• Dietrich Stein · Bochum, DE
• Knud Gerdes · Bochum, DE

Key dates

• Filing date: Mar 27, 1987
• Grant date: Aug 2, 1988
• Expiry date: Mar 27, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K17/30
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention is directed to a process for strengthening and sealing geological formations which are moist or contain water, in particular loose stone, by the injection of a mixture which reacts to form polyurethane, characterized in that a polyisocyanate component is injected before injection of the reaction mixture.