Dispersant

US6680355B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Franz Weingart · Leimen, DE
• Roman Benedikt Raether · Speyer, DE
• Stephan Bauer · Ostercappeln, DE
• Ulrike Hees · Mannheim, DE
• Manfred Mielke · Heidelberg, DE
• Ulrike Schlosser · Ludwigshafen, DE
• Rudiger Sens · Ludwigshafen, DE

Key dates

• Filing date: Apr 24, 2001
• Grant date: Jan 20, 2004
• Expiry date: Apr 24, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G9/08791
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Disclosed is a dispersant obtainable by reacting(i) a di- or polyfunctional isocyanate with(ii) an HX-terminated polymeric compound, where X is COO, O, S or NR1 and R1 is H or C1-C6-alkyl; and either(iii) an HY-terminated homopolymer of a monomer selected from the group consisting of N-vinylamides, N-vinyllactams and vinyl- or allyl-substituted nitrogenous heterocycles or copolymer of one or more of the monomers mentioned and optionally further monomers, where Y is COO, O, S or NR2 and R2 is H or C1-C6-alkyl; or(iv) an HY-functional organic phosphonic ester, where Y is as defined above.The dispersant is especially useful for dispersing pigments and for preparing inkjet inks.