Phosphoric esters as emulsifiers and dispersants

US6689731B2 · kind B2 · utility

Assignee

• GOLDSCHMIDT HOLDING GMBH · DE

Inventors

• Eberhard Esselborn · Essen, DE
• Wernfried Heilen · Alpen, DE
• Kathrin Lehmann · Leverkusen, DE
• Ellen Reuter · Essen, DE
• Stefan Silber · Krefeld, DE
• Andreas Stüttgen · Duisburg, DE

Key dates

• Filing date: May 23, 2001
• Grant date: Feb 10, 2004
• Expiry date: May 27, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B67/0085
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to the use of particular phosphoric esters as emulsifiers and dispersants for pigments and fillers, based on polystyrene-block (b)-polyalkylene oxide copolymers.The invention provides block copolymeric phosphoric esters and their salts of the general formula (I)[R1O(SO)a(EO)b(CH2CHCH3O)c(BO)d]xPO&#8212;(OH)3&#8722;x&#8195;&#8195;(I)whereR1=a straight-chain or branched or cycloaliphatic radical having 1 to 22 carbon atoms,SO=styrene oxide,EO=ethylene oxide,BO=butylene oxide anda=1 to<2,b=3 to 100,c=0 to 10,d=0 to 3,x=1 or 2where b&gE;a+c+d.