Patent ID: 7442731

Claim:
An opaque coating having a thickness of from 5 to 25 μm, comprising a high-molecular-weight organic material, from 5 to 15% by weight of 3,6-di(4′-biphenyl)-2,5-dihydro-pyrrolo[3,4-c]-pyrrole-1,4-dione, based on the total non-volatile content, at least one further coloured pigment and optionally additionally white pigments, black pigments or effect pigments, wherein, based on the total amount of coloured pigments, (a) from 30 to 90% by weight of 3,6-di(4′-biphenyl)-2,5-dihydro-pyrrolo[3,4-c]-pyrrole-1,4-dione pigment having a specific surface area of from 20 to 50 m 2 /g and (b) from 10 to 70% by weight of a further organic coloured pigment having a specific surface area of from 10 to 40 m 2 /g, selected from the group consisting of quinacridones, diketo-pyrrolo[3,4-c]-pyrroles, perylenes, and 3-amino-1H-isoindol-1-one-oximato-metal complex pigments, and solid solutions and mixtures thereof, are present.