Co-polymers based on oxyalkyleneglycol alkenyl ethers and unsaturated dicarboxylic acid derivatives

US5798425A · kind A · utility

Assignee

• SKW Trostberg Aktiengesellschaft · DE

Inventors

• Gerhard Albrecht · Prien am Chiemsee, DE
• Josef Weichmann · Pleiskirchen, DE
• Johann Penkner · Tacherting, DE
• Alfred Kern · Schneeberg, DE

Key dates

• Filing date: Apr 8, 1996
• Grant date: Aug 25, 1998
• Expiry date: Apr 8, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F290/062
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed is a co-polymer based on oxyalkyleneglycol alkenyl ethers and unsaturated dicarboxylic acid derivatives, as well as vinylic polyalkyleneglycol, polysiloxane or ester compounds. These co-polymers can be used as additives for hydraulic binding agents, especially cement. The co-polymers of the invention have an excellent and long-lasting liquefying action without introducing large amounts of air pores into the binding agent mixtures, thereby preventing the loss of strength and stability of the hardened building materials.