Preparation of amino-functional siloxanes

US6534615B2 · kind B2 · utility

Assignee

• Consortium für elektrochemische Industrie GmbH · DE

Inventors

• Oliver Schäfer · Hersbruck, DE
• Volker Frey · Burghausen, DE
• Bernd Pachaly · Schweich, DE
• Andreas Bauer · Kaarst, DE

Key dates

• Filing date: Oct 5, 2001
• Grant date: Mar 18, 2003
• Expiry date: Oct 5, 2021

Classification

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

Abstract

The invention relates to a process for preparing an amino-functional organosiloxane of the formula III,(SiO{fraction (4/2)})k(R1SiO{fraction (3/2)})m(R12SiO{fraction (2/2)})p(R13SiO½)q[O½SiR12—R—NH2]s[O½H]t  (III)which comprises reacting an organosiloxane of the formula IV(SiO{fraction (4/2)})k(R1SiO{fraction (3/2)})m(R12SiO{fraction (2/2)})p(R13SiO½)q[O½H]r  (IV)with a cyclic silazane of the formula V whereR, Rx, R1, s, t, r, k, m, p and q are as defined in claim 1.