Process and apparatus for continuous hydrosilylation

US6291622A · kind A · utility

Assignee

• GOLDSCHMIDT HOLDING GMBH · DE

Inventors

• Jurgen Drose · Essen, DE
• Hubertus Geisler · Werl, DE
• Wolfgang Hiersche · Essen, DE
• Klaus-Dieter Klein · Oberkochen, DE
• Wilfried Knott · Essen, DE
• Andreas Mehrwald · Regensburg, DE
• Dagmar Windbiel · Essen, DE

Key dates

• Filing date: Dec 22, 1999
• Grant date: Sep 18, 2001
• Expiry date: Dec 22, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/38
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A continuous process for preparing organomodified polysiloxanes by the transition metal-catalyzed addition of polysiloxanes containing SiH groups onto substances containing C--C multiple bonds, in particular a process for the continuous hydrosilylation of substances containing C--C multiple bonds, which comprises introducing the reactants, in the presence or absence of a homogeneous or heterogeneous catalyst, into a loop-like, heatable and coolable reaction circuit which has a static mixing element and/or a dynamic mixing element to mix starting materials and product formed, leaving the reaction mixture in the reaction circuit until a predetermined degree of conversion has been reached and subsequently transferring the reaction mixture still containing starting materials to a tube reactor to complete the reaction and taking it off via a receiver. In addition, a suitable industrial apparatus for carrying out the process of the invention is described.