Aqueous coating composition, aqueous coating material kit and article having coated film

An aqueous coating composition, which comprises an aqueous synthetic resin dispersion and a urethane polyol,

• wherein the urethane polyol is a reaction product of a polyoxyalkylene diol having as units an oxyalkylene group of a structure such that an oxygen atom is bonded to one end of a branched alkylene group, and an aliphatic diisocyanate,
• wherein at least part of the synthetic resin in the aqueous synthetic resin dispersion is a fluorinated resin, and
• wherein a hydroxy value of the fluorinated resin is at least 20 mgKOH/g,
• and wherein:
• the fluorinated resin is a fluorinated copolymer (A1p) having structural units based on the following monomer (m1), structural units based on the following monomer (m2) and structural units based on the following monomer (m3):
• monomer (m1):
• a fluoroolefin,
• monomer (m2):
• a macromonomer having a hydrophilic moiety, and
• monomer (m3):
• a hydroxy group-containing monomer represented by the following formula (m3):
• R1—R2—OH (m3)
• wherein R1 is a group having a radical polymerizable unsaturated group, and
• R2 is a n-nonylene group or a cyclohexane-1,4-dimethylene group;
• or
• the fluorinated resin is a fluorinated copolymer (A2p) having from 40 to 60 mol % of structural units represented by the following formula (a1), from 3 to 50 mol% of structural units represented by the following formula (a2), from 4 to 30 mol % of structural units represented by the following formula (a3) and from 0.4 to 7 mol % of structural units represented by the following formula (a4), with the proviso that the total amount of the structural units represented by the formula (a1), the structural units represented by the formula (a2), the structural units represented by the formula (a3) and the structural units represented by the formula (a4) is from 80 to 100 mol %:
• wherein each of X1 and X2 which are independent of each other, is a hydrogen atom, a chlorine atom or a fluorine atom, X3 is a hydrogen atom, a chlorine atom, a fluorine atom or —CY1Y2Y3, and each of Y1, Y2 and Y3 which are independent of one another, is a hydrogen atom, a chlorine atom or a fluorine atom,
• wherein Ra is a hydrogen atom or a methyl group, R11 is a C1-12 alkyl group or a C4-10 monovalent alicyclic group, u is an integer of from 0 to 8, and v is 0 or 1,
• wherein Rb is a hydrogen atom or a methyl group, R12 is a C1-10 alkylene group or a C4-10 bivalent alicyclic group, w is an integer of from 0 to 8, and x is 0 or 1,
• wherein Rc is a hydrogen atom or a methyl group, R13 is a C1-10 alkylene group or a C4-10 bivalent alicyclic group, R14 is a C2-10 alkylene group or a C4-10 bivalent alicyclic group, R15 is —OH or —O−+NHZ1Z2Z3, each of Z1, Z2 and Z3 which are independent of one another, is a hydrogen atom, a C1-4 alkyl group or a C1-6 hydroxyalkyl group, at least some of R15 are
• —O−+NHZ1Z2Z3, y is an integer of form 0 to 8, and z is 0 or 1.