Basf Se Corporation

Audrey Cosyns

Ekkehard Jahns

John G Kelly

Sebastian Roller

Robert Rupaner

Roland Baumstark

Jacob Wildeson

Robert Feuerhake

Arno Tuchbreiter

Jörg Nieberle

An aqueous coating composition for blocking stains and a method of using the coating composition is described. The coating composition includes an aqueous dispersion of a copolymer that is derived from a single stage emulsion polymerization of an ethylenically unsaturated nonionic monomer, greater than 0 and less than 1.5% by weight of an ethylenically unsaturated strong acid monomer or salt thereof, and greater than 1.5% and less than 3% by weight of methacrylic acid.

Stain blocking compositions

An aqueous coating formulation for tannin-containing substrates can include a substituted C-Cpolyalkyleneimine. Reacting a C-Cpolyalkyleneimine having a weight-average molecular weight of from 500 to 10,000 g/mol with a carboxylic acid derivative can produce the substituted polyalkyleneimine. The carboxylic acid derivative includes at least one Cto Calkyl group or Cto Calkenyl group. Substrates that contain tannin and are coated with this aqueous coating formulation exhibit outstanding resistance with respect to color runs and color strikethrough.

Aqueous coating formulation

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Mannheim, Germany

Audrey Cosyns