Development overview of Chlorinated rubber

Chlorinated rubber is a rubber derivative product obtained from natural rubber or synthetic rubber after chlorination modification. It is the first industrialized rubber derivative in the rubber field. According to the information of British Imperial Chemical Company (ICI), in the 30 year industrial application, no poisoning event caused by contact with chlorinated rubber L1] has occurred. The relative density of chlorinated rubber is 1.596, its water absorption is 0.1 to 0.3, and its thermal stability temperature is 130 ℃. It is soluble in aromatic hydrocarbons, esters, ketones, ethers, animal and vegetable oils, and chlorinated hydrocarbon solutions, but not in aliphatic hydrocarbons, alcohols, and water [2]. Chlorinated rubber for industrial use is generally in the form of white or cream powder, flake or fiber. The chlorine content is between 62 and 65, and it has good heat resistance. Chlorinated rubber has excellent adhesion, chemical corrosion resistance, abrasion resistance, fast drying, water permeability, flame retardancy, etc. It is widely used in the production of ship paint, road marking paint, container paint, printing ink, architectural paint, chemical anti-corrosion paint, flame retardant paint, automobile chassis coating, railway train chassis coating and offshore oil platform coating. In recent years, chlorinated rubber has also been used in the adhesive industry. Chlorinated rubber paint and cold curing epoxy resin paint are two major systems of coatings in the world today, and are indispensable materials for national economy and national defense construction.

1 Development overview

CR research started in 1895. In 1915, Peachey obtained the first industrial production patent], and in 1917, United Alkali (now part of ICI) achieved industrial production [4]. In the 1930s and 1940s, the research and production of CR developed rapidly. In addition to preparing CR with NR, there was also a technology of producing CR with synthetic polyisoprene rubber, but the former was dominant. By the early 1990s, it was said that the annual output of CNR in the world was about 40kt, and by 2000, the annual output of CNR in the world was about 70kt. Countries producing chlorinated rubber in the world include Britain, the United States, Germany, Japan and Italy. At present, the annual output of chlorinated rubber in the world is 40000 tons (data in 1995). ICI, a British company, has the largest output of 15000t/a, accounting for 30% of the world’s total output; It is followed by Hercules in the United States, Bayer in Germany, Xudian in Japan and Shanyang Guoce Pulp. According to the Montreal Protocol, the developed countries have closed the plant for producing chlorinated rubber with carbon tetrachloride at the end of 1995, and have adopted the aqueous phase method or other new technologies.

Post time: Nov-03-2022