Polymeric materials suitable as dispersing resins

US5756637A · kind A · utility

Assignee

• Emtec Magnetics GmbH · DE

Inventors

• Gregor Brodt · Heppenheim, DE
• Josef Schelble · Munich, DE
• August Lehner
• Franz Weingart · Leimen, DE
• Albert Kohl · Laumersheim, DE
• Ria Kress · Ludwigshafen, DE
• Norbert Schneider · Schorndorf, DE

Key dates

• Filing date: May 6, 1996
• Grant date: May 26, 1998
• Expiry date: May 6, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S428/90
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A polymeric material I is obtainable by reacting PA1 1) a polymer II of PA2 a) from 80 to almost 100 mol % of a C.sub.1 -C.sub.25 -alkyl ester of an .alpha.,.beta.-unsaturated carboxylic acid, PA2 b) from 0 to 20 mol % of one or more further monomers and PA2 c) an initiator and/or regulator by means of which the majority of the polymer chains of the polymer II are terminated at one of their ends by a hydroxyl group, PA1 2) with a polyfunctional nonaromatic isocyanate III to give a reaction product IV, the amount of isocyanate groups being from 1.2 to 3.9 mol per mole of the hydroxyl groups in II, PA1 3) reacting IV with PA2 a) a compound V, containing groups reactive toward isocyanates, to give a reaction product VI, the amount of reactive groups being from 2 to 7 mol per mole of the free isocyanate groups still present in IV, PA2 and PA2 reacting VI with a compound VII to give the polymer I, which reacts with the reactive groups which are still free in VI and by means of which acidic groups are introduced into VI, or PA2 b) a compound VIII which contains groups reactive toward isocyanates and by means of which the acidic groups are introduced into IV, to give the polymer I. The po…