Opaque, colour-pigmented coating
AssigneeCiba Specialty Chemicals Corporation
InventorRolf Tittmann
Life of this patent
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Abstract
The invention relates to a coating having a thickness of from 5 to 25 μm, comprising a high-molecular-weight organic material and from 5 to 9 g/m2 colored pigments, wherein, based on the total amount of colored 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 having a specific surface area of from 20 to 50 m2/g and (b) from 10 to 70% by weight of a further organic colored pigment, selected from the series consisting of quinacridone, diketo-pyrrolo[3,4-c]-pyrrole, dioxazine, indanthrone, perylene, phthalocyanine and 3-amino-1H-isoindol-1-one-oximatometal complex pigments and solid solutions and mixtures thereof, are present.
Claims20
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 m2/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 m2/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.
A method of coating a material with a coating, which method comprises the step of applying to the material a surface-coating composition comprising 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, 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 m2/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 m2/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.
A surface-coating composition comprising 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, 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 m2/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 m2/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.
Dependencies are inferred from the claim text.