Process for preparing organosiloxanes

US5011962A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Gerhard Staiger · Frankenthal (Pfalz), DE
• Johann Muller · Burghausen, DE
• Walter Doskocil · Burghausen, DE

Key dates

• Filing date: May 30, 1990
• Grant date: Apr 30, 1991
• Expiry date: May 30, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F7/0874
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Organosiloxanes (1) of the general formula EQU R.sup.1.sub.4-n Si(OSiR.sub.3).sub.n, in which R is the same or different and represents a hydrogen atom or a monovalent hydrocarbon radical having from 1 to 18 carbon atom(s) per radical or a substituted monovalent hydrocarbon radical having from 1 to 18 carbon atom(s) per radical, R.sup.1 represents R or a chlorine atom, and n is 3 or 4, are prepared by reacting organodisiloxanes (2) of the general formula EQU (R.sub.3 Si).sub.2 O, with chlorosilanes (3) of the general formula EQU R.sub.4-n SiCl.sub.n, in which R and n are the same as above, in the presence of phosphonitrile chlorides (4) and cocatalysts (5), in which the cocatalysts (5) are used concomitantly with the phosphonitrile chlorides (4) and are selected from the group consisting of amides of the general formula EQU X--C(O)--R.sup.2, in which R.sup.2 is the same or different and represents a hydrogen atom or a monovalent hydrocarbon radical having from 1 to 8 carbon atom(s) per radical or a substituted monovalent hydrocarbon radical having from 1 to 8 carbon atom(s) per radical, and X reresents a radical of the formula R.sup.2.sub.2 N- or ##STR1## where R.sup.2 is the same …