Process for producing a multilayer coating comprising a sparkling coat layer and multilayer coating obtained from said process

A process for producing a multilayer coating (MC) on a substrate(S), the process comprising:

• (1) optionally applying a composition (Z1) to the substrate(S) and subsequently curing the composition (Z1) to form a cured first coating layer (S1) on the substrate(S);
• (2) applying, directly to the cured first coating layer (S1) or the substrate(S),
• (a) an aqueous basecoat composition (bL2a) to form a basecoat layer (BL2a) or
• (b) at least two aqueous basecoat compositions (bL2-a) and (bL2-z) in direct sequence to form at least two basecoat layers (BL2-a) and (BL2-z) directly upon each other;
• (3) applying a clearcoat composition (c1) directly to the basecoat layer (BL2a) or the top basecoat layer (BL2-z) to form a clearcoat layer (C1) and jointly curing the basecoat layer (BL2a) or the at least two basecoat layers (BL2-a) and (BL2-z) and the clearcoat layer (C1);
• (4) applying a composition (Z2) directly to the clearcoat layer (C1) to form a coating layer (L3);
• (5) applying a clearcoat composition (c2) directly to the coating layer (L3) to form a clearcoat layer (C2);
• and
• (6) jointly curing
• the coating layer (L3) and the clearcoat layer (C2);
• wherein the composition (Z2) comprises:
• (i) at least one binder B,
• (ii) at least one solvent L,
• (iii) at least one platelet glass flake pigment GF1 having an average particle size D90 of 30 to 54 μm, measured by means of laser diffraction according to DIN EN ISO 13320:2009-10, and having a span ΔD of 0.6 to 3.0;
• and
• (iv) at least one platelet glass flake pigment GF2 having an average particle size D90 of 55 to 80 μm, measured by means of laser diffraction according to DIN EN ISO 13320:2009-10, and having a span ΔD of 0.6 to 2.7;
• wherein the composition (Z2) comprises a weight ratio of the at least one platelet glass flake pigment GF1 to the at least one platelet glass flake pigment GF2 of 3:1 to 1:3;
• wherein the at least one platelet glass flake pigment GF1 and the at least one platelet glass flake pigment GF2 are different from each other.