Water-hardening polymer preparations

US5090405A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Bernhard Jansen · Cologne, DE
• Hanns P. Muller · Leverkusen, DE
• Roland Richter · Cologne, DE
• Wolfram Mayer · Odenthal, DE

Key dates

• Filing date: Aug 12, 1988
• Grant date: Feb 25, 1992
• Expiry date: Aug 12, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/249958
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a construction material comprising a flexible carrier substrate impregnated or coated with a water-hardening resin, the resin contains as an additive polyether polysiloxane polyurethanes of the formula ##STR1## in which R.sup.1 is lower alkyl, PA0 m is the average number of siloxane groups in the range from 5 to 25, PA0 R is ##STR2## in which X is lower alkylene, PA1 Y is an aliphatic, cycloaliphatic, aromatic or araliphatic moiety, which is unsubstituted or substituted by further ##STR3## Z is a polyether moiety based on ethylene oxide units propylene oxide units, or both with the average number of ethylene oxide and propylene oxide units being in the range fro 10 to 100 and PA1 R.sup.2 is lower alkyl.