Lightly-foaming tenside mixtures with hydroxy mixed ethers

US7332466B2 · kind B2 · utility

Assignee

• Cognis Deutschland GmbH & Co. KG · DE

Inventors

• Karl Schmid · Mettmann, DE
• Rita Koester · Goldkronach, DE

Key dates

• Filing date: Nov 17, 2004
• Grant date: Feb 19, 2008
• Expiry date: Jan 17, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D1/721
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A low-foaming surfactant composition comprising: (a) a hydroxy mixed ether corresponding to formula I:R1O[CH2CH(CH3)O]x(CH2CHR2O)y[CH2CH(OH)R3]z  (I)wherein R1 is an alkyl and/or alkylene group containing from 4 to 18 carbon atoms, R2 is hydrogen, R3 is an alkyl group having from 2 to 22 carbon atoms, x is 0, y is a number from 1 to 30, and z is a number from 1 to 3; and (b) a low-foaming nonionic surfactant selected from the group consisting of an optionally end-capped fatty alcohol polyethylene glycol/polypropylene glycol ether corresponding to formula II:R4O(CH2CH2O)n[CH2(CH3)CHO]mR5   (II)wherein R4 is an alkyl and/or alkylene group containing from 8 to 22 carbon atoms, R5 is hydrogen or an alkyl group containing from 1 to 8 carbon atoms, n is a number from 1 to 15 and m is a number up to 10, an optionally end-capped fatty alcohol polypropylene glycol/polyethylene glycol ether corresponding to formula II:R6O[CH2(CH3)CHO]p(CH2CH2O)qR7   (III)wherein R6 is an alkyl and/or alkylene group having from 8 to 22 carbon atoms, R7 is hydrogen or an alkyl group having from 1 to 8 carbon atoms, p is a number from 1 to 5, and q is a number up to 15, and mixtures thereof.