Beta-naphthol ether sulfonates, processes for preparing them and use thereof as brightness improvers

US10611725B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Sophie Maitro-Vogel · Mannheim, DE
• Michael Lorenz · Bad Zwischenahn, DE
• Tobias Urban · Besigheim, DE
• Silke Annika Koehler · Basel, CH

Key dates

• Filing date: May 18, 2016
• Grant date: Apr 7, 2020
• Expiry date: Jan 4, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D3/565
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The present invention relates to beta-naphthol ether sulfonic acids or salts thereof having the general formula (I) R—O-(AO)n—CH2—CH2—S(O)3M (I), where R, AO, n and M have the definitions stated in the claims and in the description, to mixtures thereof, to aqueous solutions and to electrolytes comprising them, to processes for preparing them and to the use of these.