Aqueous two-component polyurethane coating composition, process for its preparation, and its use in methods of producing a multicoat paint system
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United States of America Patent
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Mar 2, 1999
Grant Date -
N/A
app pub date -
Jul 3, 1997
filing date -
Nov 7, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to an aqueous two-component polyurethane coating composition comprising A) a water-dilutable polyacrylate resin (A) having an OH number of from 40 to 200 and an acid number of from 20 to 100 mg of KOH/g, and B) a polyisocyanate component, characterized in that the water-dilutable acrylate resin is obtainable by solution polymerization of at least one ester of (meth)acrylic acid and a cycloaliphatic C.sub.6 to C.sub.10 alcohol, with the exception of cyclohexyl methacrylate, at least one hydroxyl-containing monomer, if desired, at least one vinyl ester of .alpha.-branched monocarboxylic acids having 5 to 18 carbon atoms per molecule and/or at least one reaction product of acrylic acid and/or methacrylic acid with the glycidyl ester of .alpha.-branched monocarboxylic acids having 5 to 18 carbon atoms per molecule, at least one carboxyl-containing monomer and, if desired, further, essentially carboxyl-free monomers, the resulting polyacrylate resin being at least partially neutralized and dispersed in water.
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Cited Art Landscape
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