Rubbers chlorosulfonated polyethylene

ETU is used as an accelerator in the vulcanization of polychloroprene (Neoprene) and other elastomers for coated fabrics, for epichlorohydrin and for chlorosulfonated polyethylene rubbers. It is also an intermediate for antioxidants, insecticides, fungicides, dyes, pharmaceuticals, and synthetic resins. 

Used as a secondary accelerator with antioxidant, antiozonant, and stabilizing function in synthetic rubber and high polymer materials in the plastics and rubber industries. Mainly used in styrene-butadiene rubber (SBR), chloroprene rubber (CR), epichlorohydrin, and chlorosulfonated polyethylene rubber. Promotes heat-resistance of chlorosulfonated polyethylene rubber, EPDM and CSM and sunshine resistance of CR. 

Tensile strengths of chlorosulfonated polyethylene rubber (CSM) vulcanisates are around 3.5 MPa, depending upon formulation. In resilience, the elastomer compares favourably with other synthetic elastomers, though generally its resilience is lower than NR vulcanisates. Flex and abrasion resistance are very good and CSM will not support combustion. 

Chem. Descrip. Chlorosulfonated polyethylene rubber (89-99%), carbon tetrachloride (< 2%), chloroform (< 0.2%), talc (1%)... 

As a consequence, before 1953, the only possible blends were those of LDPE with other polymers than PO or with elastomers (e.g., chlorosulfonated polyethylene rubber, CSR chlorinated butyl mbber, CBR ethylene/propylene/diene copolymers, EPR, EPDM thermoplastic olefinic elastomer TPE, TPO). However, in addition to the original autoclave polymerization, already in 1938, a tubular reactor was introduced and its product had different properties than that from the autoclave. Also varying the reaction condition affected the degree of short- and long-chain branching in LDPE thus, blending different LDPEs offered a way for optimizing the resin to specific applications. 

Chlorosulfonated polyethylene rubber is manufactured by DuPont under the tradename Hypalon. In many respects it is similar to neoprene, but it does possess some advantages over neoprene in certain types of service. It has better ozone resistance and chemical resistance. 

The natural rubber does not generally exhibit all the desired properties for use in the rubber industry. Thus, it is possible to obtain better mechanical and physical properties at a lower cost by blending natural rubber with synthetic rubbers. Normally, natural rubber is deteriorated by ozone and thermal attacks due to its highly unsaturated backbone, and it also shows low oil and chemical resistances due to its non-polarity. However, these properties can be achieved by blending it with low unsaturated ethylene propylene diene monomer rubber, styrene butadiene rubber, carboxylate styrene butadiene rubber, nitrile butadiene rubber, chloroprene rubber, chlorosulfonated polyethylene rubber, and acrylonitrile butadiene rubber. 

Natural rubber/chlorosulfonated polyethylene rubber blends also exhibited immiscibility. Chlorosulfonated polyethylene rubber is the synthetic rubber used for applications in electric cables, hoses for liquid chemicals, waterproof cloths, floor tiles, and oil-resistant seals. It is chosen to blend with natural rubber to improve the resistance of natural rubber to ozone, oil, heat, flame and non-polar chemicals. This is due to the effect of the polarity of the chlorine groups in the chlorosulfonated polyethylene rubber. The tensile strength, elongation at break, and tear strength of these blends decreased with the increasing chlorosulfonated polyethylene rubber contents. In addition, the compatible natural rubber/chlorosulfonated polyethylene rubber blends were improved by adding the epoxidized natural rubber (Epoxyprene 25) as a... 

Chlorosulfonated Polyethylene Rubber n Thermosetting elastomers containing 20-40% chlorine. Have good weatherability and heat and chemical resistance. Used for hoses, tubes, sheets, footwear soles, and inflatable boats. 

Chlorosulfonated polyethylene rubbers may also be vulcanized with peroxides, which results in final... 

Chlorosulfonated polyethylene rubbers exhibit intrinsic resistance to the attack of oxygen and ozone properly compormded products have excellent weathering resistance. For very severe service conditions (150-180°C), CSM vulcanized with peroxides can be further improved by adding a synergistic combination of... 

Hypalon is chlorosulfonated polyethylene rubber DuPont Elastomers ... 

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