By: Dupont Elastomers  09-12-2011
Keywords: Polymers, chemical resistance, Synthetic Rubber

DuPont™ Neoprene polychloroprene is an extremely versatile synthetic rubber with more than 75 years of proven performance in a broad industry spectrum. It was originally developed as an oil-resistant substitute for natural rubber. Neoprene is noted for a unique combination of properties, which has led to its use in thousands of applications in diverse environments.

  • Resists degradation from sun, ozone and weather
  • Performs well in contact with oils and many chemicals
  • Remains useful over a wide temperature range
  • Displays outstanding physical toughness
  • Resists burning inherently better than exclusively hydrocarbon rubbers
  • Outstanding resistance to damage caused by flexing and twisting

The basic chemical composition of Neoprene synthetic rubber is polychloroprene. The polymer structure can be modified by copolymerizing chloroprene with sulfur and/or 2,3 dichloro 1,3-butadiene to yield a family of materials with a broad range of chemical and physical properties. By proper selection and formulation of these polymers, the compounder can achieve optimum performance for a given end-use. Neoprene is available as a solid and as a liquid dispersion.

  G Types W Types T Types A Types Liquid Dispersions
Raw Polymers Limited Storage Stability
Peptizable to Varying Degrees
No Accelerators Necessary
Fast Curing, But Safe Processing
Excellent Storage Stability
Non Peptizable
Accelerator Required Cure Flexibility
Solid polymers for solvent-based adhesives
Excellent Storage Stability
Least Nerve
Accelerator Required Cure Flexibility
Best Extrusion, Calendering Performance
Solid Polymers for solvent-based Adhesives
Formulating Latitude
Liquid dispersion types for waterbased adhesives and other applications
Formulating Latitude
Product Performance Best Tear Strength
Best Flex
Best Resilience
Best Compression Set Resistance
Best Heat Aging
Excellent contactability
Properties similar to W Types Excellent contactability
Bond durability
High-temperature resistance
Excellent contactability
Bond durability
High-temperature resistance
Long-term performance
Chemical resistance
See Selection Guide to help select the appropriate type of Neoprene in developing a compound for a particular application.

Neoprene liquid dispersions are aqueous, colloidal dispersions of polychloroprene or copolymers of chloroprene and other monomers such as methacrylic acid or 2,3 dichloro 1,3-butadiene. They are available in both anionic and non-ionic forms. All have the unique combination of:

  • Excellent film formation
  • High cohesive strength without curing
  • Elastomeric properties over a wide temperature range
Grade Adhesives Binders Coatings Dipped Goods Elasticized
571 X   X X    
671A X X X X X X
750 X     X    
842A X X X X   X

Neoprene polymers are not final products, rather raw materials from which the final products may be formulated. Specific compounding details are available separately. To receive copies of this information, please call 800-853-5515.

Keywords: Chemical Composition, chemical resistance, Long-term Performance, Methacrylic Acid, Polymers, Synthetic Rubber,

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