Polymer dispersions and sound deadener compositions with emulsion polymer from two-stage preparation

US9536513B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Dirk Wulff · Schifferstadt, DE
• Joerg-Alexander DIMMER · Mannheim, DE
• Peter Preishuber-Pfluegl · Ludwigshafen, DE

Key dates

• Filing date: Jul 25, 2014
• Grant date: Jan 3, 2017
• Expiry date: Jul 25, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K2003/3045
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A description is given of an aqueous polymer dispersion comprising a polymer which is obtainable by emulsion polymerization from a monomer mixture comprising as hydrophilic monomers ethoxylated (meth)acrylate monomer, acid monomer, and C1 to C20 hydroxyalkyl(meth)acrylate; and also at least one hydrophobic principal monomer, selected from C1 to C20 alkyl(meth)acrylates and vinylaromatics; and also, optionally, further monomers. This polymer is preparable by at least two-stage emulsion polymerization, where in a first polymerization stage the predominant fraction or the entire amount of the hydrophilic monomers is used, and in a later polymerization stage the predominant fraction or the entire amount of the hydrophobic monomers is used. The polymer dispersion is a suitable binder for aqueous particle dispersions, more particularly of sound deadener compositions, which comprise inorganic and optionally also organic particulate solids. Also described is a method for damping oscillations or vibrations of vehicle components.