Pe wax dispersions in the coating of plastics

An aqueous paint formulation composed of at least one aqueous basecoat and at least one aqueous dispersion of at least one at least partially neutralized ethylene copolymer wax which is selected from ethylene copolymer waxes comprising as comonomers in copolymerized form:

• (A) 12% to 40%, preferably 20% to 35%, by weight of at least one ethylenically unsaturated carboxylic acid of the general formula I,
• where
• R1 and R2 are selected independently of one another from hydrogen and unbranched and branched C1-C10alkyl;
• (B) 60% to 88%, preferably 80% to 65%, by weight of ethylene;
• (C) 0% to 10%, preferably 0% to 5%, by weight of at least one further comonomer;
• or
• (A′) 5% to 50%, preferably 20% to 40%, by weight of at least one comonomer of the general formula II
• where
• R1 and R2 are selected independently of one another from hydrogen and unbranched and branched C1-C10alkyl,
• R3 is selected independently at each occurrence from hydrogen, unbranched and branched C1-C10alkyl, and C3-C12cycloalkyl, where two radicals R3 may be joined to one another to form a 3- to 10-membered ring,
• X is selected from oxygen, sulfur, and N—R4,
• R4 is selected from hydrogen and unbranched and branched C1-C10alkyl, and
• A1 is a divalent group selected from C1-C10alkylene, C4-10cycloalkylene, and phenylene;
• (B′) 50% to 95% by weight of ethylene, preferably 60% to 80% by weight, and
• (C′) zero to 20% by weight, preferably zero to 10% by weight, of at least one further comonomer;
• where the ethylene copolymer wax comprising the comonomers (A), (B), and optionally (C) has a molecular weight Mw of 10 000 to 150 000 g/mol, and the ethylene copolymer wax comprising the comonomers (A′), (B′), and optionally (C′) has a molecular weight Mw of 5000 to 40 000 g/mol.