Basf Aktiengesellschaft

Gregory John Catterall

Oliver Wagner

Bernhard Schuler

David Christie

Mubarik Mahmood Chowdhry

Hideki Yamashita

David Redfern

Cheeseng Yong

Jonathon Shane Allen

Roger Jan Van Sonsbeek

The invention also relates to a method to increase stain resistance and penetration resistance of aqueous coating compositions which method comprises providing a coating composition which contain at least one pigment, at least one film-forming polymer in the form of an aqueous polymer dispersion and at least one anionic surfactant, wherein the anionic surfactant comprises at least 85% by weight, preferably at least 90% by weight, more preferably at least 95% by weight, based on the total weight of anionic surfactant in the coating composition, of at least one anionic surfactant S, which is selected from semi-esters of sulfuric acid or phosphoric acid with an alcohol, which alcohol carries at least one alkyl radical having from 8 to 30 carbon atoms or an alkyl substituted phenyl radical wherein alkyl has from 4 to 30 carbon atoms and which alcohol may carry an oligo-C-C-alkylene-ether group provided that the number of repeating units in the oligo-C-C-alkylene-ether group is at most 15, or a salt thereof.

Method to increase resistance against stain penetration of aqueous coating compositions

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Essendon North, Australia

Gregory John Catterall