Coloured metallic paint compositions and painted objects

Citation

(1998), "Coloured metallic paint compositions and painted objects", Pigment & Resin Technology, Vol. 27 No. 3. https://doi.org/10.1108/prt.1998.12927cad.022

Coloured metallic paint compositions and painted objects

Coloured metallic paint compositions and painted objects

Keywords Colour, Lacke and Farben, Metallic paints, Patents

In World Patent 97/31983 BASF Lacke & Farben AG describes a method of obtaining a metallic paint within which a coloured metallic paint film has excellent features. The change in colour is produced according to differences in the viewing angle and can be formed using the usual cheap pigments without compounding special glitter materials. A paint composition which contains, per 100 parts by weight of a film forming binder (A), from 0.1-15 parts by weight of metallic powder (B), from 0.1-10 parts by weight of a first coloured pigment (C) of primary particle size from 0.01-0.2µm which is selected from among the group comprising the phthalocyanine, perylene, indanthrone, azomethine, benzimidazolone, quinacridone, anthraquinone, diketopyrolopyrrole and dioxazine based pigments, and from 0.5-50 parts by weight of a second coloured pigment (D) of primary particle size from 0.1-2µm selected from among the group. This group comprises the diketopyrolopyrrole, quinacridone, pyrazolone, naphthol AS, iron oxide and complex metal oxide based pigments. The primary particle size of the pigment (C) is relatively smaller than that of the pigment (D), and there is a complementary colour relationship between the pigments (C) and (D).