Use of ethylene oxide/propylene oxide block copolymers in hydraulic binder materials and materials so obtained

US5360841A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Bernhard Knop · Monheim, DE
• Horst Tamm · Haan, DE
• Gerhard Walter · Erkrath, DE

Key dates

• Filing date: Dec 20, 1991
• Grant date: Nov 1, 1994
• Expiry date: Dec 20, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2103/0075
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The addition of ethylene oxide/propylene oxide block copolymers containing 5 to 35 weight % of ethylene oxy groups and molar masses of the propylene glycol block between 1500 and 3000 to dry, hydraulic binder materials results in reduced dust formation, improved wettability, and enhanced flow properties of these materials when they are mixed with water.