The history of the coating

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Coating industry belongs to the modern industry, but the paint itself has a long history. China is the world's natural resin as film forming material coating, the earliest Chinese lacquer. Early painters use mineral pigments, water suspension or water or will allocate the albumin, it is one of the earliest water-based paint. Really know use solvent, solvent to dissolve solid natural resin, made quick drying coating is the middle of the 19th century began. So in a sense, the use of solvent-based coating history is far from water-based paint so far. The most simple coating is lime emulsion, about one hundred years ago had no plans to join emulsion modified linseed oil, I'm afraid this is the earliest emulsioni paint. Since the mid - 1930 - s, Germany began the polyvinyl alcohol as a protection of polyvinyl acetate emulsion used as coatings show color. In the 50 s, pure acrylic emulsion in Europe and the United States has been limited to sell, but because the price is expensive, not much increase its output. Into the '60 s, in all the emulsion of development, the most prominent is the vinyl acetate - ethylene vinyl acetate ethylene copolymer with senior fatty acid is also improved, yield increase. Since the 70 s, as a result of the law on the protection of environment and of the people environmental protection consciousness to strengthen, countries limit the organic solvent and emissions of harmful substances, so that the use of paint under restrictions. 75% of the manufacture of paint raw materials from oil chemical industry, due to the economic crisis of the western industrial countries and the third world countries to adjust the price of oil, worldwide, general requirement to save energy and resource conservation. Based on the above reasons, water-based paint, latex paint, in particular, as the generation of oil products is more and more aroused people's attention. Has made rapid progress in the preparation of waterborne coatings technology, especially the emulsion synthesis technology progress faster.