Styrene butadiene rubber Buna

Styrene-butadiene rubber (SBR) is also known as government rubber styrene (GRS) and Buna S. 

Styrene-butadiene rubber (SBR) (also known as Buna S) 0.94 40-100 400-600 1600-3700 -60 107... 

Styrene—Butadiene Rubber (SBR). This is the most important synthetic mbber and represents more than half of all synthetic mbber production (Table 3) (see Styrene-butadiene rubber). It is a copolymer of 1,3-butadiene, CH2=CH—CH=CH2, and styrene, CgH5CH=CH2, and is a descendant of the original Buna S first produced in Germany during the 1930s. The polymerization is carried out in an emulsion system where a mixture of the two monomers is mixed with a soap solution containing the necessary catalysts (initiators). The final product is an emulsion of the copolymer, ie, a fluid latex (see Latex technology). 

Grove s synthesis org chem Production of alkyl chlorides by passing hydrochloric acid into an alcohol In the presence of anhydrous zinc chloride. grovz sin-th3S3s ) GR-S rubber org chem Former designation for general-purpose synthetic rubbers formed by copolymerization of emulsions of styrene and butadiene used in tires and other rubber products previously also known as Buna-S, currently known as SBR (styrene-butadiene rubber). je ar es. rab ar)... 

Styrene-butadiene rubber, or E-SBR as it is known in manufacturing circles, was first developed in the 1930s. Known as Buna S, the compound was prepared by I.G. Farbenindustrie in Germany. Manufacturing styrene-butadiene rubber was through an emulsion polymerization process which produced a material that had a low reaction viscosity, yet had all the attributes of natural rubber. 

Buna S - [STYRENE-BUTADIENE RUBBER] (Vol 22) -ethylene glycol compatibility [ANTIFREEZES AND DEICING FLUIDES] (Vol 3)... 

Buna BL. [Bayer, Milib] Styrene-butadiene rubber, lithium. 

By 1929 the German firm I. G. Earben developed a series of synthetic rubbers similar to those produced in the USSR. They were called Buna rubbers ( Bu for butadiene, one of the copolymers, and na for sodium, the polymerization catalyst). They included the oil-resistant Buna S (S for styrene) and Buna N (N for nitrate). Buna S, styrene butadiene rubber, is currently called SBR, and it is produced at about twice the volume of natural rubber, making it the most common synthetic rubber. Buna N, acrylonitrile-butadiene rubber, is now called NBR. During World War II the United States produced these rubbers for the American war effort. 

Styrene-butadiene rubber (SBR, Buna-S, and GR-S) n. A group of widely used synthetic rubbers comprising about three... 

Up to the advent of World War II, practically all of the rubber consumed was of the natural variety, mostly derived from Hevea brasiliensis plantations in the Far East. With the entrance of Japan into the war, both the United States and western Europe were cut off from the main source. At this point one of the most massive organic chemistry research and development efforts in history was launched, which ultimately resulted in the development of synthetic elastomers such as Buna N, Neoprene, Thiokol, and styrene-butadiene. While these were not equivalent to the natural product in some respects, product improvement continued so that by 1970 worldwide synthetic rubber production was 3.8 million metric tons compared to 2.7 million of the natural product. Styrene-butadiene rubber sold for about the same price as natural rubber. Although national defense interest dictated a policy of independence from foreign raw materials, conventional bias-belted tires still required 15% natural rubber for optimum performance. 

Buna-S or SS n (GR-S) A synthetic elastomer produced by the copolymerization of butadiene and styrene. Manufactured by Huls, Germany. Also known as Styrene-Butadiene Rubber. 

Emulsion polymerisation of a mixture of butadiene and styrene gives a synthetic rubber (Buna S GBS rubber), which is used either alone or blended with natural rubber for automobile tyres and a variety of other articles. 

The Government Rubber Reserve Company in the 1940s pioneered the development of styrene-butadiene copolymers, by far the largest volume of synthetic rubber used today. Now usually known as SBR, it has also been called Buna-S, Rzrtadiene with a sodium (Na) catalyst and copolymerized... 

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