Innovative Process Solutions

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A Jakob Müller Company


Polycondensation or step-growth polymerization is often used for the processing of adhesives, coatings, engineered plastics, fibers, films and many high-performance polymers.

During the polycondensation reaction, the volatile monomers are evaporated from the lower molecular weight pre-polymers to form polymers with a higher molecular weight.

In LIST KneaderReactors the high process temperatures and low vacuum levels in combination with robust mixing and frequent surface renewal allow a quick removal of the monomers, maximizing the mass transfer efficiency.

Highly flexible LIST KneaderReactors enable the polycondensation of various polymer grades in one single machine without having to retool between the production campaigns.


High performance polyamides for high temperature applications

Low caloric food additive

Polyaspartic Acid (PASA)
Polyaspartic acid as additive for washing powder

Special grade polyesters e.g. for medical applications

Epoxy Resin
Thickener for paints and coatings

Your Benefits

  • Effective self-cleaning to minimize dead zones, product accumulation and product degradation
  • High surface renewal efficiency
  • Large free vapour volume
  • Low shear processing
  • Narrow residence time distribution combined with a wide and flexible range of residence times
  • Plug flow behaviour
  • Preventing local overheating
  • Wide turndown ratio