The chloroacetate resin 1929 was first produced in Germany and the United States, but only 1975 was reported in the relevant literature. The earliest patent application was filed by the German company Buner. From 1975 to 1983, the research team led by Schirge Harard and schlegel Roland studied the synthesis conditions and micro-suspension technology of chlorovinegar emulsion. 65438-0988, the Soviet Union studied the influence of various factors on the properties of resin in the process of microemulsion [4]. At present, the main producers of chloroacetic acid resin in the world are the United States, Germany and Japan, with a total output of over 200,000 tons/year. China began to produce vinyl acetate resin in 1960s, with an annual output of 2,000 tons, but now a considerable part of vinyl acetate resin needs to be imported from abroad. At present, the domestic market demand of PVC in China is more than 7 million tons per year, while the actual production capacity has reached more than10 million tons. Because of the unstable quality and uneven particle size, it is not feasible to export vinyl chloride resin.
Correction: At present (20 1 1), the domestic demand is also great. Domestic demand is mostly domestic production. Now it mainly produces small enterprises with generally stable quality. High-end products mainly rely on imports, such as Germany Weikai (Wacker) and Sunshine Chemical Malaysia (Sun) Co., Ltd., but these foreign companies are expensive and in short supply. However,.