CSM is valued for its resistance to chemicals, oil, abrasion, weather and temperature extremes and ultraviolet light.

DuPont exited the chlorosulfonated polyethylene business in 2010, closing its only Hypalon™ rubber manufacturing facility. With our Chlorosulfonated Polyethylene (CSM) rubber compounding experience, Preferred can help you find a Hypalon replacement for your products, either with CSM from another manufacturer or with another compound.

Chlorosulphonated polyethylene rubber properties

CSM rubber has poor fuel resistance and poor compression set resistance, which limits its use for sealing. Compounding with other polymers and ingredients will improve these properties.

CSM can be colored. Preferred produces chlorosulfonated polyethylene compound in sponge, sheets, pellets or granules, slab, strip and calendared.

Various CSM properties and grades, created by modifying the chlorination and chlorosulphonation and type of polyethylene polymer, are available. Additional properties can be modified during compounding.

CSM applications

CSM is used for automotive hoses, gas and industrial applications, electric cable jacketing, machine parts, floor tiles, magnetic rubber, rubber coated cloth, coatings, gaskets, flexible tubes, rolls and linings. Special applications for chlorosulfonated polyethylene can include escalator handrails, diaphragms and lining for chemical processing equipment.

CSM trade names

Replacements for Hypalon rubber include:

  • Hailon chlorosulfonated polyethylene from Lianda
  • TOSO-CSM®, extos® alkylated chlorosulphonated polyethylene from TOSOH of Japan
  • A variety of CSM products from Jiangxi Hongrun Chemical Co., Ltd.

Fully supported custom rubber compounding

Preferred Compounding is a full service custom rubber compounder. As a Preferred customer/partner, you gain access to our comprehensive support resources.

Preferred’s technical services staff includes chemists with decades of experience. They formulate and optimize custom elastomeric compounds to achieve the desired field performance, manufacturability and cost for your compounds. Through the custom compounding recipe, we can engineer the extent and rate of curing, processing characteristics, final properties, performance and cost.

Thousands of compounding ingredients

We work with thousands of ingredients and compounding polymers and more than 100 rubber mixing and processing variables. We produce compounded elastomers in strips, slabs, pellets and calendered sheet. We also provide filtering by gear-pump straining.

For more information

If you would like assistance determining the right formulation for your rubber application or on improving the performance and cost of your current recipe, please contact any Preferred Compounding sales representative or Marc Pignataro by E-mail or at 330.798.4960.