Polymers containing polyacetal blocks, their preparation and their use

US5756594A · kind A · utility

Assignee

• BASF SE

Inventors

• Angelika Funhoff · Schriesheim, DE
• Dieter Boeckh · Schifferstadt, DE
• Matthias Kroner · Eisenberg, DE
• Richard Baur · Mutterstadt, DE
• Alexander Kud · Eppelsheim, DE
• Gunnar Schornick · Neuleiningen, DE
• Volker Schwendemann · Neustadt, DE

Key dates

• Filing date: Sep 19, 1997
• Grant date: May 26, 1998
• Expiry date: Sep 19, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/3711
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Polymers which contain polyacetal blocks are obtainable by polymerizing carboxylates containing aldehyde groups in the presence of initiators and reacting the polymers with at least bifunctional crosslinking agents in the presence of acids or Lewis acids and, if required hydrolyzing the ester groups present as polymerized units, process for the preparation of the polymers containing polyacetal blocks by polymerizing carboxylates containing aldehyde groups in the presence of initiators and reacting the resulting polyacetals containing terminal hydroxyl groups with at least bifunctional crosslinking agents in the presence of acids or Lewis acids, and the use of the resulting polymers as additives in phosphate-free and reduced phosphate detergents and cleaning agents, as scale inhibitors and as dispersants for pigments.