×

Aqueous coating composition and production of multicoat paint systems using said coating composition

  • US 9,976,052 B2
  • Filed: 12/11/2014
  • Issued: 05/22/2018
  • Est. Priority Date: 12/18/2013
  • Status: Expired due to Fees
First Claim
Patent Images

1. An aqueous coating composition, comprising:

  • at least one aqueous dispersion comprising at least one copolymer (CP) obtained by(i) charging an aqueous dispersion comprising at least one polyurethane (A), and then(ii) polymerizing a mixture of olefinically unsaturated monomers in the presence of the polyurethane (A) from (i),wherein(a) a water soluble initiator initiates the polymerizing,(b) the olefinically unsaturated monomers are added to the aqueous dispersion such that a concentration of 6.0% by weight based on the total amount of olefinically unsaturated monomers polymerizing, in the aqueous dispersion is not exceeded over the entire reaction time, and(c) the mixture of the olefinically unsaturated monomers comprises at least one polyolefinically unsaturated monomer;

    at least one linear hydroxyl-functional reaction product (R) having an acid number less than 20 mg KOH/g, obtained by reacting at least one compound (v) comprising two functional groups (v.a) and an aliphatic or araliphatic hydrocarbyl radical (v.b) which is arranged between the functional groups and has 12 to 70 carbon atoms; and

    at least one polyurethane resin (X), obtained by reacting at least one compound (x.1) comprising at least one carboxylic acid group and at least one group reactive toward isocyanate groups.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×