Stable water glass solutions, process for their preparation and use for organosilicate foams as well as a production process therefor

US4447561A · kind A · utility

Assignee

• BASF SE

Inventors

• Peter Horn · Heidelberg, DE
• Robert Gehm · Schifferstadt, DE
• Matthias Marx · Fürstenfeldbruck, DE
• Artur Roeber · Ludwigshafen, DE

Key dates

• Filing date: Jul 14, 1983
• Grant date: May 8, 1984
• Expiry date: Jul 14, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Stable water glass solutions are obtained PA0 (A) by mixing a solution of an aqueous alkali silicate solution and alkali hydroxide with a tertiary amine and subsequently oxyalkylating the resultant two-phase reaction mixture with at least one alkylene oxide in such an amount that a uniform solution forms or PA0 (B) by oxyalkylating a tertiary amine with at least one alkylene oxide and mixing the resultant reaction mixture with a solution of an aqueous alkali silicate solution and alkali hydroxide. The stable water glass solutions are suitable for the preparation of organo silicate foams. For the preparation of the organo silicate foams, a mixture of the stable water glass solutions and tertiary amino group-containing polyether polyols is reacted with organic polyisocyanates in the presence of catalysts, blowing agents and optionally auxiliaries and additives.