Process for the treatment of fibrous materials with modified organopolysiloxanes and the materials

US5196260A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventors

• Franz Dirschl · Augsburg, DE
• Jurgen Uhl · Seeheim-Jugenheim, DE
• Michael Bernheim · Arlesheim, CH

Key dates

• Filing date: May 27, 1992
• Grant date: Mar 23, 1993
• Expiry date: May 27, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T442/2352
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to a process for the treatment of fibrous materials with modified organopolysiloxanes, wherein, in an aqueous medium, an organopolysiloxane copolymer prepared in a first stage from customary cyclic siloxanes (A) and unsaturated silanes (B) in the presence of a crosslinking agent and emulsifier (1) is copolymerized in a second stage with at least one vinyl monomer in the presence of emulsifiers (2), and the resulting dispersion of the modified organopolysiloxane copolymer is applied to the material in the customary manner and the material is dried and subjected to condensation. The process has the advantage that the materials, in particular textiles, treated by the process, above all coated by the process, have very good waterproof properties and at the same time good to very good water repellency. However, the materials are simultaneously distinguished by a pleasant soft handle, without the degree of whiteness thereof being noticeably impaired.