Storage-stable urea preparations which are suitable as rheology control agents

US9796860B2 · kind B2 · utility

Assignee

• BYK-CHEMIE GMBH · DE

Inventors

• Daniela Leutfeld · Wesel, DE
• Marc Eberhardt · Wesel, DE
• René Nagelsdiek · Hamminkeln, DE
• Sylvia Bühne · Duisburg, DE
• Jürgen Omeis · Wulfen, DE
• Berthold Jacobs · Wesel, DE

Key dates

• Filing date: Apr 15, 2015
• Grant date: Oct 24, 2017
• Expiry date: Apr 15, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D5/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a urea preparation containing (A) 5 to 75 wt. % of one or more urea components which have a molecular weight of at least 350 g/mol and contain at least one urea group; (B) 15 to 95 wt. %, preferably 30 to 80 wt. %, of one or more organic solvents from the group of N alkyl amides that have a molecular weight of 155 to 700 g/mol, are free of urea groups, and have the following formula (I), in which (a) R1 is an x-containing hydrocarbon group, where x=1 to 24 carbon atoms, R2 is a y-containing organic group, where y=1 to 12 carbon atoms, and R3 is a z-containing organic group, where z=1 to 12 carbon atoms, or (b) R1, R2, and R3 are defined as in (a) but R1 and R2 are connected to each other by a chemical bond and together form a ring with 4 to 10 ring atoms while incorporating the group C(═O)N, and in the case of a ring with 4 or 5 ring atoms, R3 contains at least 6 carbon atoms and maximally 11 carbon atoms, or (c) R1, R2, and R3 are defined as in (a) but R2 and R3 are connected to each other by a chemical bond and together form a ring with 4 to 10 ring atoms while incorporating the nitrogen atom of the general formula (I) with the proviso that for each of (a…