Use of polyacrylate esters as dispersants

US5744523A · kind A · utility

Assignee

• Th. Goldschmidt. AG · DE

Inventors

• Michael Barkowsky · Essen, DE
• Jurgen Fock · Goldkronach, DE
• Dietmar Schaefer · Hattingen, DE

Key dates

• Filing date: Aug 10, 1995
• Grant date: Apr 28, 1998
• Expiry date: Aug 10, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S524/923
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Polyacrylate esters having an average molecular weight of 1500 to 20,000 and being obtainable by the transesterification of alkyl polyacrylates, obtained by free radical polymerization and containing 1 to 4 carbon atoms in the alkyl group, with PA0 a) saturated or unsaturated aliphatic alcohols with 12 to 22 carbon atoms and PA0 b) optionally, additionally with dialkylaminoalkanols of the general formula HO--R.sup.1 --NR.sup.2 R.sup.3, wherein R.sup.1 is a divalent alkylene groups with 2 to 4 carbon atoms and are R.sup.2, R.sup.3 are the same or different and represent alkyl groups with 1 to 4 carbon atoms, the molar ratio of the aliphatic alcohols a) to the dialkylaminoalkanols b) being 1:0 to 1:1.5, and the components a) and b) being used in such amounts, that 25 to 70% of the ester groups are transesterified, are used as dispersants for finely divided solids, particularly for fillers and pigments, in organic media.