Rapid development of inorganic pigment industry
With the recovery of the global economy, domestic and foreign building materials, paint, plastics, inks and other industries have seen rapid growth, the demand for inorganic pigments has also increased rapidly. With the rapid development of the coating industry, as one of its main raw materials inorganic pigments have been developed by leaps and bounds, of which titanium dioxide, iron oxide accounted for the largest proportion.
Humans used inorganic pigments early on, and prehistoric tobacco black, chalk, chroma, and natural iron oxide have been used as pigments. In 3000 BC to 2000 BC, the production method of lead white has been mastered. Around 200 B.C., China used artificial refining of Hg Zhu (HgS) as a pigment. In 1704, Disbach, Germany, invented the color pigment Prussia Blue (a dark blue pigment, the main component of Fe4 (Fe)6 3 xH2O manufacturing method. In 1809, France L.-N. Volkeran made chrome yellow, in 1831 France I.B. Gimey planted near Lyon to produce cluster green, in 1874 the British Company of Auschwitz Zinc White company owned the Widnes plant produced zinc birch white. In 1916, titanium composite pigments (including TiO225%), 1923 pure titanium dioxide (titanium dioxide) into production, so that the level of pigment production has taken a big step forward. At present, inorganic pigment chromatography, basically complete.
Inorganic pigments generally resistant to high temperature, high hardness, super-weather, corrosion resistance, most of the performance indicators are much higher than organic paint, and very environmentally friendly, but most of the coating needs high temperature, ultra-high temperature, color type is not rich, the surface effect is not good, severely limit its use. In addition to easy coating, organic coating softens, but also has the advantages of good toughness, rich color, good decoration, strong applicability to substrates and so on. It can be seen that the advantages of inorganic coatings are mostly the advantages of organic coatings, organic coatings are also the weakness of inorganic coatings, and the emergence of porcelain film coatings, precisely the advantages of the two combined.
