Aqueous cationic tenside preparations, method for the production and use thereof

US6509012B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Peter Hossel · Schifferstadt, DE
• Michael Zirnstein · Schriesheim, DE
• Walter Schunter · Freinsheim, DE
• Friedrich Wirsing · Speyer, DE
• Wolfgang Kasel · Schallstadt, DE
• Knut Oppenlander · Ludwigshafen, DE

Key dates

• Filing date: Oct 25, 1999
• Grant date: Jan 21, 2003
• Expiry date: Oct 25, 2019

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K2800/59
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The disclosure sets forth aqueous cationic surfactant formulations and a process for their preparation. The formulations contains in solution a) from 10 to 50% by weight of a quaternary ammonium compound of the formula I: where: the substituents have the meanings set forth in the description, and b) from 0.01 to 15% by weight of an amine of the formula III: and c) from 0.1 to 5.0% by weight of a buffer which maintains a pH in a range from 4 to 9. The surfactant formulation is prepared by reacting an amine of the formula III in aqueous solution with a dialkyl sulfate of the formula IV where R1 to R5 are in a molar ratio range from 85 to 99.99 mol %, based on the amine and at from 20 to 100 degrees C. and then adding to the reaction solution from 0.1 to 5.0% by weight of a buffer which maintains a pH in a range from 4 to 9.