Method for producing phosphonatosilanes

US7884224B2 · kind B2 · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Andreas Bockholt · Munich, DE
• Leonhard Brader · Munich, DE

Key dates

• Filing date: Jun 23, 2005
• Grant date: Feb 8, 2011
• Expiry date: Jul 12, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/4012
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In the preparation of phosphonatosilanes by reaction of organophosphites with halocarbon-functional silanes, the safety of the reaction is markedly increased while increasing space/time yield by continuously or periodically withdrawing reaction mixture, freeing the withdrawn mixture of phosphonatosilane product, and recycling the product-depleted remainder back to the reaction. Operation at temperatures of 100° C. or lower is made possible by this process.