Low-solvent, OH-functional dispersions

US7495053B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Martin Melchiors · Leverkusen, DE
• Thomas Munzmay · Dormagen, DE
• Thomas Stingl · Montabaur, DE
• Hartmut Ottensmann · Mülheim an der Ruhr, DE

Key dates

• Filing date: Dec 15, 2004
• Grant date: Feb 24, 2009
• Expiry date: Oct 2, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D133/14
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Aqueous, hydroxy-functional binder dispersions with a low solvent content and based on hydroxy-functional copolymers. The binders are prepared by subjecting one or more vinyl monomer mixtures containing OH-free (meth)acrylic esters and/or vinylaromatics, hydroxy-functional vinyl monomers and/or hydroxy-functional (meth)acrylic esters, and ionic and/or potentially ionic monomers capable of free-radical copolymerization, to free-radical polymerization in the presence of at least one compound containing lactone groups and subsequently dispersing the resultant copolymer before or after addition of a neutralizing agent in water. The binder combinations can be used in coating materials.