The history of human production and use of paint can be traced back to the Stone Age. From the large amount of archaeological data discovered, it has been confirmed that in the primitive society 7000 years ago, humans have used raw oils, sap and natural pigments to prepare original finishing materials, and painted with feathers and branches to achieve decoration. the goal of. With the advancement of human society, after entering the Bronze Age, the ancient civilizations of the time had different progress in the direct use of natural materials to formulate coatings. As early as in the Shang Dynasty, China has taken natural lacquer fixtures, palaces and temples from wild lacquer trees. In the Spring and Autumn Period, we have mastered the technology of tanning and tung oil coating. In the Warring States period, we have been able to use lacquer and tung oil to compound coatings, and created a technology to use auxiliaries in coatings to promote the development of coatings into a new era. The paint film and lacquer lacquer film unearthed from Mawangdui Han Tomb in Changsha is tough and has excellent protection performance, which fully demonstrates the maturity of the development of the use of raw lacquer technology in China in the second century BC. Due to the application of tung oil and lacquer, the customary name of "paint" has been formed and has been passed down to the present day. In the last century, the great achievements of polymer science theory and the development of various polymer compounds have been successfully put into production, creating a new era for paint development. In the 1920s, alkyd resins, which were specially used as film-forming materials for coatings, were successfully developed. Since then, various newly developed synthetic resins have been rapidly applied in coatings, and the coatings have entered the era of synthetic film-forming materials. In 1980, the annual output of coatings in the world exceeded 20 million tons. The per capita consumption of coatings in developed countries reached more than 10kg. The modern coatings industry has become an important industry in the modern chemical industry.
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A Brief Analysis of the Development History of Wood Coatings
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