Chloroprene
Rubbers > Group R
Polychloroprene Rubber (CR) | ||||||||
CR or Polychloroprene Rubber is a homopolymer of Chlorobutadiene, or Chloroprene. Chloroprene rubber is a general name given to a number of unsaturated synthetic rubber based on polychloroprene and manufactured by emulsion curing. It stands out for having a balanced combination of properties that makes it the multifunctional rubber par excellence. The chlorine atom increases the level of resistance to oils, placing it between natural rubber and nitrile rubber. It offers the most balanced set of desirable properties. Acceptable resistance in vulcanizates with hardness from 60º Shore A. Chloroprene rubber shows a marked tendency to crystallization. This happens because small crystals form within the macromolecules; its effect is more or less marked. Great swelling in some oils, hot water, acids and some organic solvents. | ||||||||
Symbols | Estructura Cloropreno | |||||||
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Caracteristicas del caucho Policloropreno | ||||||||
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Rubber Physical-Mechanical properties Polychloroprene | ||||||||
Excellent mechanical properties, excellent resistance to abrasion, tearing and fatigue. Excellent resistance to UV radiation, ozone, oxygen, atmospheric agents and hot aging, but hardened by prolonged reductions in the presence of oxygen. Discrete resistance at low temperatures, high impermeability to many gases. The vulcanized chloroprene rubber with ordinary composition shows a tendency to absorb water; when it is a problem, it is less than NBR and SBR. Chloroprene has a tendency to harden over time (especially at low temperatures), this is because they form crystals in their macromolecules. | ||||||||
Applications of Polychloroprene rubber | ||||||||
Chloroprene is degraded less than natural rubber or other synthetic rubbers. This characteristic makes it suitable for applications such as gaskets, pipes and anticorrosive coatings. Cloprene is used as a support base, generally between two prefabricated reinforced concrete elements or steel plates to distribute the tension uniformly from one element to another. They are used for the manufacture of pipes for the transport of liquids; coatings of electric cables; quick joints for recessed channels, as a substitute for lead. Expanded chloroprene, or cellular chloroprene contains gas cells, is used as an insulating material, particularly in diving suits. Chloroprene foam is also used in other applications, such as insulation and protection in containers. Chloroprene is also used for personal protective equipment, such as protective suits or gas masks. Polychloroprene is used as a support base, usually between two prefabricated reinforced concrete elements or steel plates to distribute the tension uniformly from one element to another. Expanded chloroprene, which contains gas cells, is used as an insulating material, particularly in diving suits. Chloroprene foam is also used in other applications, such as insulation and protection in containers. Its excellent adhesion to metals makes it ideal for molding with metal inserts. | ||||||||