Aqueous pigment dispersions

US3998652A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Volker Aign · Monheim, DE
• Klaus Walz
• Reinhold Hornle
• Karlheinz Wolf · Leverkusen, DE
• Norbert Pusch · Leverkusen, DE

Key dates

• Filing date: Apr 25, 1975
• Grant date: Dec 21, 1976
• Expiry date: Apr 25, 1995

Classification

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

Abstract

Aqueous pigment dispersions which contain organic or inorganic pigments and water-soluble oxalkylation products of compounds which are obtainable by condensation of aromatic compounds, containing phenolic OH groups, or their ethers, especially lower alkyl ethers, with formaldehyde and amines which contain at least 2 NH groups which are reactive towards formaldehyde, or derivatives of such oxalkylation products are suitable for pigmenting natural or synthetic materials.