Chloroprene rubber has excellent weather resistance, ozone resistance, chemical corrosion resistance, oil resistance, and its comprehensive physical and mechanical properties are also good.The tensile properties of neoprene are similar to that of natural rubber, and its weathering and ozone resistance properties are only second to ethylene propylene rubber and butyl rubber, and its oil resistance is only second to butyl nitrile rubber. Neoprene can be used as both general rubber and special rubber.
Development history of chloroprene rubber abroad
In September 1934, dupont used emulsion polymerization process for the first time. After sulfur regulating CR(G type) came out in 1937, CR was officially called Neoprene in 1938.The initial CR was expensive, with NR prices as high as 75:5 cents per pound.So it's almost all military.
Construction of a CR production plant began in yerevan, Armenia, in 1933, a pilot test was carried out in 1934, and a 2000 t/y CR industrial plant was completed in 1940.
In 1950, Bayer company was optimistic about the commercial value of CR and decided to develop CR. In April 1957, Bayer company realized the industrialization of CR production technology.The product was called Perbunan C and was produced by a continuous polymerization process.
In 1960, Japanese electrochemical industry company began to study the production process of CR, and established a pilot plant with a monthly production of 1 ton. In July 1962, the first commercial production of CR (200 tons/month) was realized, and the product was named Denka Chloroprene.
In June 1971, dongcao company used butadiene chlorination technology to build a 6,000-ton/year CR device in nanyang, tashan, Japan, which was later expanded to 20,000 tons/year.
Domestic chloroprene rubber development history
The domestic research on the synthesis of chloroprene rubber by acetylene acetylene was first carried out by changchun institute of applied chemistry, Chinese academy of sciences, and a 5.4 ton/month test facility was built in changchun in 1953.
In 1956, chongqing changshou chemical plant built a 2000 ton/year production facility using the above scientific research results and the technology of the former Soviet union, and put into operation in 1958.After the expansion, the capacity reached 28,000 tons/year.
In 1965, shanxi synthetic rubber group built a 2500 ton/year calcium carbide acetylene chloroprene rubber production plant, the post-treatment using electrolyte condensation technology.
In 1966, Qingdao chemical plant in shandong province built acetylene production equipment of calcium carbide with a production capacity of 2500 tons per year.
In 1987, changshou chemical industry, shanxi syntheses and Qingdao chemical plant successively introduced the freezing condensation technology and carried out the renovation and expansion of the plant. After the expansion, the production capacity of Qingdao chemical plant reached 10,000 tons per year, but the plant was discontinued and transformed in the late 1990s.After several times of reconstruction and expansion, the production capacity of shanxi synthetic chloroprene rubber reached 25,000 tons per year in 2001, and was shut down in 2013.
In 2007, shanxi synthetic rubber group co., ltd. and Armenia irit co., ltd. jointly established shanner synthetic rubber co., LTD., to build a chloroprene rubber production plant with an annual output of 30,000 tons. The plant was completed in December 2009 and put into operation in May 2010.
In 2017, chongqing longevity chemical co., LTD will be with the shanxi changzhi family industrial co., LTD., joint venture cooperation, jointly build 40000 tons/year of neoprene device, and introduce the third party set up a joint venture, the joint venture company purchase family 40000 tons/year of industrial building neoprene device, the new company will longevity chemical technology and resource of industrial equipment for the customer resources and huo together, effectively realized the neoprene industry resources integration, or will make its get rapid development.With the continuous increase of domestic chloroprene rubber production capacity, market competition has intensified, but it is always opportunities and challenges coexist, other enterprises still need to develop and grow to adapt to the changes in the environment.