Overtrukne uorganiske pigmenter, fremgangsmåde til deres fremstilling og deres anvendelse

摘要

PCT No. PCT/EP96/02017 Sec. 371 Date Dec. 8, 1997 Sec. 102(e) Date Dec. 8, 1997 PCT Filed May 10, 1996 PCT Pub. No. WO96/41840 PCT Pub. Date Dec. 27, 1996A description is given of coated inorganic pigments comprising an organic pigment which has a coating, prepared by the sol-gel process from glass-forming components and densified to form a xerogel or glass, having a layer thickness of at least 0.8 mu m. These pigments are prepared by spray drying a sol-pigment dispersion, followed if desired by thermal densification of the xerogel layer to form a glass layer. The coated pigments are suitable for producing enamels and moldings.