COIL-COATED SPECTRALLY SELECTIVE COATINGS ON COPPER OR ALUMINUM WITH PIGMENTS MODIFIED BY AMINOSILANE

摘要

This invention relates to aminosilane modified pigments, method of their preparation, coatings made with such pigments, their production and application. More specifically, invention relates to a procedure of using aminosilanes for the treatment of various black and coloured pigments with a view to modifying the pigments' surface properties, methods for obtaining the ensuing dispersions and making from them paints and coatings that show enhanced covering efficiency, enabling the preparation of black or coloured Thickness Sensitive Spectrally Selective, TSSS, and Thickness Insensitive Spectrally Selective, TISS, paint coatings, together with the method of their preparation and their use on metal and non-metal substrates. A procedure for funetionalisation of an inorganic pigment by aminosilane for use in spectrally selective coatings is characterized by dispersing pigment in a solution of an aminosilane in a solvent or a mixture of a solvent and a binder without an addition of a non-aminosilane dispersing agent with or without subsequent grinding and use of 0.05-30 % of aminosilane on pigment and/or use of an aromatic, aliphatic, cycloalyphatic, ketone, ester, ether or alcohol compound or a mixture of thereof as the solvent and/or use of a silicone-polyester, polyurethane or fluoropolymer binder, whereas the said procedure is performed either in-situ during coating or pigment paste production or followed by an isolation of the aminosilane functionalised pigment.