Aqueous artificial resin dispersions free of emulsifying agents

US4373056A · kind A · utility

Assignee

• Rohm GmbH Chemische Fabrik · DE

Inventors

• Siegmund Besecke · Hameln, DE
• Herbert Fink · Emmelshausen, DE
• Norbert Sutterlin · Ober-Ramstadt, DE
• Gerhard Markert · Ober-Ramstadt, DE
• Gunter Schroder · Minden, DE
• Willi Tilch · Reinheim, DE

Key dates

• Filing date: Aug 24, 1981
• Grant date: Feb 8, 1983
• Expiry date: Aug 24, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F220/585
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An aqueous artificial resin dispersion, comprising an aqueous phase and a water-insoluble disperse phase formed from particles containing a copolymer formed in substantial part from a water insoluble or slightly soluble first monomer, wherein the copolymer additionally is formed from a second monomer of the formula ##STR1## wherein R represents hydrogen or methyl, R' represents hydrogen or an alkyl radical with 1 to 12 C-atoms, R" represents an alkyl radical with 7 to 20 C-atoms, and M represents a proton, an alkali metal ion, or an ammonium ion, with the proviso that the aqueous phase is free of low molecular weight, ionic emulsifying agents. Such dispersions are particularly well suited for continuous emulsion polymerization because of the highly stable monomer emulsions formed by mixtures produced according to the invention.