Process for the preparation of aqueous emulsions of graft copolymers and use of the emulsions as binders for air drying coatings

Abstract

Abstract In a process for the preparation of aqueous emulsions of graft copolymers which are obtained by emulsion polymerisation of vinyl and/or (meth)acrylic monomers in the presence of emulsifier resins based on polyol esters of (meth)acrylic- and optionally vinyl-modified drying fatty acids, the polymerisation of a monomer mixture (A) is carried out in an aqueous emulsion of a product (B) of the condensation of the polymerisation of drying fatty acids, polyols, optionally polyethylene glycol and vinyl and (meth)acrylic monomers, where part of this monomer mixture comprises (meth)acrylic acid. Component (B) can be obtained either by grafting the monomers onto the fatty acid polyol ester or by esterifying the fatty acid graft polymer using polyols. The emulsions are suitable for air-drying, water-dilutable paints and road marking paints. They are distinguished by fast surface drying and good film properties.

Inventors

• 👤 Bertram Dr. Zückert
• 👤 Gerfried Dr. Klintschar

Bibliographic Details