Process for waterproofing materials having a fibrous structure and agents used to carry out this process

US5686011A · kind A · utility

Assignee

• Chemische Fabrik Stockhausen GmbH · DE

Inventors

• Helmut Lohmann · Krefeld, DE
• Manfred Kaussen · Ottersweier, DE
• Leonardus Strijbos · Neuenburg am Rhein, DE
• Waldemar Inger · Krefeld, DE

Key dates

• Filing date: Feb 8, 1995
• Grant date: Nov 11, 1997
• Expiry date: Feb 8, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C14C9/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process is disclosed for waterproofing materials having a fibrous structure, such as leather, persian leather or leather replacement materials, by using waterproofing agents containing sulfosuccinic acid esters. Also disclosed are waterproofing agents used to carry out this process. The sulfosuccinic acid esters are prepared by reacting maleic anhydride with monohydric or polyhydric alcohols, then by sulfitizing them. Reactive siloxanes may also be used as polyhydric alcohols.