Polychloroprene cables

Due to its balance of strength, oil resistance, inflammability, increased resistance to ozone, ageing and weathering, polychloroprene finds widespread industrial use. Typical uses are V-belts, conveyor belts, wire and cable jacketing, footwear, wet suit applications, coated fabrics, inflatables, hoses, extrusions and many other goods. Adhesives are also a strong market area. 

Ethylenethiourea has a wide variety of uses in addition to vulcanization, a principal application since 1948. The curing process converts most of the ETU to other compounds, but traces of it are still found in the rubbers. Neoprene (polychloroprene) is found largely in automotive parts, wire and cable insulation, construction and adhesives. Consumer products containing neoprenes include container seals (e.g., aerosol dispensers) and shoes. It is also an intermediate in the manufacture of antioxidants, dyes, fungicides, insecticides, pharmaceuticals, synthetic resins, and a constituent of plating baths. 

Neoprene, or polychloroprene rubber (CR) was one of the very first synthetic rubbers produced. It was a material of choice for exterior applications such as profiles used in vehicles, building seals, and cables. Many more marketable products have benefited from this plastic. Except for SBR and IR, neoprene (CR) elastomers are perhaps the most rubberlike of all materials, particularly with regard to its dynamic response (Table 2.6). CRs are a family of elastomers with a property profile that approaches that of NRs (natural rubbers) but has better resistance to oils, ozone, oxidation, and flame. CRs age better and do not soften up on exposure to heat, although their high-temperature tensile strength may be lower than that of NRs. They are suitable for service at 250C (480F). 

Poly(2-chloro-1,3-butadlene) or polychloroprene, (-CH2C(CI)=CHCH2-)n, CAS 9010-98-4, is a polymer widely used in practice, for example in automotive industry for the fabrication of belts, gaskets, electrical cables covering, etc. (mainly in vulcanized form). The older procedure for chloroprene preparation starts with acetylene, which is subject to catalytic dimerization followed by addition of HCI to the vinylacetylene molecule. 

Uses Polychloroprene for wire/cable, industrial hose and belting, automotive gaskets, seals, hose, tire sidewalls, molded and extruded goods, cellular prods., adhesives, sealants, and protective coatings, for shoe, home crafts, and sporting goods prods. 

Uses Polychloroprene for wire/cable, hose, gaskets, seals, tire sidewalls. 

Uses Accelerator for polychloroprene elastomers, halobutyl rubbers esp. chlorobutyl used for mech. goods, cables, hoses, membranes, fabric proofings, vulcanizing sol ns. 

Matty polymers may be used for produetion of wire and cable. These include polyethylene, crosslinked polyethylene, chlorosnlfonated polyethylene, ethylene-propylene rubber, polyvinylchloride, bntyl robber, styrene bntadiene rubber, silicone rubber, natural robber, polyisoprene robber, polyurethane, nitrile butadiene rubber, polychloroprene, polysulfone, thermoplastie elastomers, polyimide, and polyamides. Selection of polymer(s) depends on projected conditions of service such as temperature, presence of corrosive liquids, surrounding temperature, quality of insulation, etc. 

Chloroprene rubber, polychloroprene (CR). A syniheXic rubber produced by polymerization of chloroprene (2-chlorobutadiene, CH2=CCl—CH = CH 2). High weather and chemical resistance, better oil resistance than that of natural rubber products. Some applications building sheets, belts, cable insulations, technical rubber goods, contact adhesives. Trade names Baypren (FRG), Neoprene (USA). 

Polychloroprene is used in highway-pavement seals, expansion joints, conveyor belts, and wire and cable jackets.) (b) polyacrylonitrile from acrylonitrile... 

Polychloroprene rubbers find use in such applications as cable-sheaths, hose and weather strips. Latices are used in the production of dipped goods, such as gloves and balloons, foams, adhesives and corrosion-resistant coatings. 

The saturated backbone of CPE imparts outstanding ozone-, oxidative-, and heat-resistance to a compound s performance [4]. The inherent nature of the polymer backbone allows compounds of CPE to be formulated that meet stringent high heat requirements, for example, up to 150°C for certain automotive applications and 105°C for various wire and cable applications using a peroxide cure system [5]. CPE typically provides better heat-aging resistance than polymers containing backbone unsaturation, for example, natural mbber and polychloroprene (CR) (Figure 8.2). 

Discolouration during vulcanisation is a specific problem in coloured cable jackets or hose covers made by the lead press method. The cause is the reaction between the lead sheath and any available sulphur in the compound, forming black lead sulphide. For this reason, sulphur modified polychloroprenes should not be used or any ingredients containing or liberating sulphur during cure, such as TMTD or factice. ETU in combination with MBTS would be the preferred accelerator. 

The wide use of polychloroprene in the wire and cable industry has been due to its good balance of properties, its resistance to weathering, ozone, abrasion, flame and oil. These properties make it very suitable for use in... 

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