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Suspension process

 
In the _LANXESS suspension (slurry) process,

  • a soluble catalyst is used to produce EPM or EPDM in a diluent in which the polymer is insoluble
  • subsequently, small rubber particles are formed as a suspension in the reaction medium; since the viscosity of the reaction medium is low, higher molecular weight rubber can be produced at high solid levels
  • following polymerization, water, antioxidants and extender oils (for oil-extended EPDM grades) are added and residual hydrocarbons are stripped from the suspension
  • the resulting crumb is then dewatered, dried and finished in a fashion similar to the solution process.


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