Method to increase resistance against stain penetration of aqueous coating compositions

US8901237B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Mubarik Mahmood Chowdhry · Strasbourg, FR
• Hideki Yamashita · Shimabara, JP
• Cheeseng Yong · Shanghai, CN
• Gregory John Catterall · Melbourne, AU
• Jonathon Shane Allen · Melbourne, AU
• Roger Jan Van Sonsbeek · Melbourne, AU
• David Redfern · Melbourne, AU
• Bernhard Schuler · Austin, US
• Oliver Wagner · Ludwigshafen, DE
• David Christie · Mannheim, DE

Key dates

• Filing date: Sep 11, 2006
• Grant date: Dec 2, 2014
• Expiry date: Mar 1, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/521
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

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-C2-C3-alkylene-ether group provided that the number of repeating units in the oligo-C2-C3-alkylene-ether group is at most 15, or a salt thereof.