US12569879USUSPTO Grant XML

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

Described herein is a process for producing a multilayer coating (MC) on a substrate (S), the process including producing at least one basecoat layer, optionally at least one clearcoat layer, at least one layer including a mixture of glass flakes and at least one further clearcoat layer and jointly curing all applied layers. Also described herein is a multilayer coating obtained by the described process.

Patent

Brief

Patent brief

Problem

How can corrosion in underground pipelines and conduits be prevented?

Novelty

Also described herein is a multilayer coating obtained by the described process.

Uses

Underground pipe, Metal conduit, Industrial line

Assignee

BASF COATINGS GMBH

Published

Mar 10, 2026

Inventors

Elke Roehr, Kerstin Reder, Berthold Deppisch

Domain

Infrastructure / energy

Plain-English summary

Problem

How can corrosion in underground pipelines and conduits be prevented?

Solution

Key novelty

Also described herein is a multilayer coating obtained by the described process.

Applications

Underground pipeMetal conduitIndustrial line

Relevant search intents

coating

Claims preview

1 . 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 D 90 of 30 to 54 m, measured by means of laser diffraction according to DIN EN ISO 13320:2009-10, and having a span D of 0.6 to 3.0; and (iv) at least one platelet glass flake pigment GF2 having an average particle size D 90 of 55 to 80 m, measured by means of laser diffraction according to DIN EN ISO 13320:2009-10, and having a span D 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. 2 . The process as claimed in claim 1 , wherein the substrate(S) is selected from the group consisting of metallic substrates, plastic substrates and substrates comprising metallic and plastic parts. 3 . The process as claimed in claim 1 , wherein the at least one platelet glass flake pigment GF1 has an average particle size D 90 of 32 to 52 m, measured by means of laser diffraction according to DIN EN ISO 13320:2009-10.

Linked approaches

Protective coatings

Barrier layers that isolate metal surfaces from corrosive environments.

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