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What Is CR Rubber?

Chloroprene rubber, better known in the US as Neoprene (Dupont’s tradename) is produced by polymerization of the monomer 2-Cchloro1,3-butadiene primarily in the configuration trans 1,4. The crystallinity of CR is influenced by the amount of trans configuration in the polymer. CR are generally classified in general purpose, adhesive and latex types. CR is in no single property superior to all other advanced elastomers, but the combination of properties cannot be obtained with other types.  

The different rubber grades are differentiated by crystallinity tendency, polymer viscosity, degree of precrosslinking and modifiers used during polymerization.  

With increasing crystallization tendency green strength, tensile strength, modulus get higher. Flex fatigue resistance and resilience are also remarkable. 

The increasing Mooney viscosity provides higher extensibility with fillers and oil, dimensional stability, green strength, mechanical properties, tear resistance, modulus and compression set resistance. 

 

Also CR can be blended with other polymers. The addition of NR improves elasticity, the addition of BR reduces the glass transition temperature and improves processing. The addition of NBR increases the resistance to oil swelling. 

performance additives scientist

what is CR Rubber Typically used For

  • AC hose 
  • Seal 
  • Wiper 
  • Power cables 
  • Covers and tubes for hoses 
  • Cover for rolls 
  • Transmission belts 
  • Corrosion resistant coatings 
  • Base for adhesives 
  • Protective clothing for divers 

What are the KEY Properties of CR

  • Very good weathering resistance 
  • Excellent flame resistance (influenced by the plasticizer) 
  • Excellent mechanical properties 
  • Good water resistance and many chemicals 
  • Good bonding to pre-treated textile, metal 
  • Low gas permeability 
  • Good oil resistance 
  • Good ozone resistance 
  • Very good aging Properties 
  • High resistance to wear 
  • Service temperature from -20°C to 120°C 

Rubber Application Matrix

HEXPOL’s rubber compounds can be used in a variety of different applications. Download our Application Matrix to see which compounds can fit your application.

Rubber Application Matrix

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To learn more about how we can make a material difference in your business, contact our skilled staff representatives for more detailed information.

HEXPOL Group