Paint films which have excellent heat-radiating properties, and a method for their formation
AssigneeBASF Japan Ltd.
InventorsShinji Yagi, Toshio Yamamoto
Life of this patent
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Abstract
Disclosed is a paint film which has excellent heat-radiating properties which comprises an undercoat paint film layer which contains from 1 to 20 mass % with respect to the total solid fraction of the paint film of carbon black and a top-coat paint film layer which contains 1 to 40 mass % with respect to the total solid fraction of the paint film of a pearl pigment and which does not contain aluminum powder and the paint film thickness of the top-coat paint film layer is from 11 to 50 μm.
Claims4
A paint film having heat-radiating properties, comprising:
- an undercoat paint film layer comprising from 1 to 20 mass % of carbon black with respect to the total solid fraction of the undercoat paint film layer, and
- a top-coat paint film layer having a film layer thickness of from 11 to 40 μm and comprising from 1 to 40 mass % of a pearl pigment with respect to the total solid fraction of the top-coat paint film layer and which does not contain aluminum powder,
- wherein the thermal emissivity of the paint film is at least 0.85.
A method of forming paint films having heat-radiating properties, comprising:
- applying to a surface of a substrate an undercoat paint comprising from 1 to 20 mass % of carbon black with respect to the total solid fraction of an undercoat paint film layer black,
- hardening the applied undercoat paint to form the undercoat paint film layer,
- applying to the undercoat paint film layer a top-coat paint comprising 1 to 40 mass % of a pearl pigment with respect to the total solid fraction of a top-coat paint film layer and which does not contain aluminum powder, and
- hardening the applied top-coat paint to form the top-coat paint film layer having a paint film thickness of from 11 to 40 μm.
Dependencies are inferred from the claim text.