EPM EPDM Masterbatch

EPDM Masterbatch
Ethylene Propylene Terpolymer Rubber Masterbatch


There are two broad categories of ethylene propylene polymers, the EPM, which is the copolymer and the EPDM, which is the terpolymer. Our current chemical industrial supplier is supplying the EPDM grade version for making the EPDM masterbatch.

Ethylene Propylene copolymer uses the EPM acronym is derived with E from Ethylene, P from Propylene and M as symbolising that the rubber has saturated chain of the polymethylene polymer. While EPDM acronym is derived with E, P and M as per above explanation, with D as meaning the units is derived from a diene rubber are in the polymer with the residual unsaturation in a side chain.

EPM and EPDM were first introduced in 1962 and are considered as one of the fastest growing elastomer estimated to be about 6% per year. This polymer exhibit excellent properties especially in an ozone environment and the ability to be highly extended.

EPM and EPDM rubber have a brittle point of -95°C and a glass transition temperature of -60°C. The numerous advantages of EPM and EPDM includes low densities, easy processing on rubber machinery and good blending with other polymers. They have good heat resistance, flexible at low temperatures. They have excellent resistance to ozone, sunlight and many other chemicals.

EPDM is preferred over EPM because of the unsaturated side chain which makes it easy to use the standard curing methods. Almost 95% of EP supplied in the world is the EPDM types.

EPM and EPDM can be extended with a large amount of oils, fillers and reinforcing agents and still retain its rubbery properties. However EPM and EPDM have bad pure gum vulcanates and have poor resistance to aromatic hydrocarbon.

EPDM Masterbatch

Masterbatching is the process of pre-incorporating the various ingredients of chemicals that are difficult to disperse properly during the compounding and mixing process. Masterbatching is also helpful to evenly pre-dispersing chemicals that are minute in quantity such as pigments, accelerators, activators or anti-oxidants. High loading of fillers and extenders also makes it difficult for dispersion and are also some of the candidates for making masterbatch.

Typical ingredients that goes into our EPDM masterbatch includes:

  • Carbon Black
  • Zinc Oxide
  • Zinc Stearate
  • Anti-oxidants
  • Processing oil
  • Fillers and extenders

By doing masterbatch of EPDM, clients can avoid handling chemical materials that are difficult to mix and/or materials that might be deemed messy or pose environmental problem to their factory. Such materials like carbon black or silica are quite dusty and messy and would require the factory to be sectioned off where an area for separate compounding to avoid the shop floor from similar messed. However by passing this compounding job to a third party, clients can avoid the hassle of doing this type of compounding.

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