Complex esters


Complex esters are polymeric structures of neopolyol esters that can reach high viscosity levels while maintaining good low-temperature properties.

Main advantages

  • Wide viscosity range, up to 10 000 mm2/s at 40°C
  • High thermal and oxidative stability
  • High film thickness and surface activity
  • Good biodegradability and low eco-toxicity, depending on the structure
  • Cost-effective


NYCO’s complex esters can be used as base-stock for the formulation of:

  • 2-stroke engine oils
  • Hydraulic fluids
  • Gear oils
  • Greases
  • Metalworking fluids

Thanks to their high film thickness properties, they can also be used as a performance additive in metalworking fluids to synergistically improve EP properties. Many of our complex esters are also suitable for environmentally-considerate lubricants such as those used in European Ecolabel compliant lubricants.  See our NYCOGREEN offer for more information. Some NYCO complex esters have also been granted HX-1 certification, allowing their use in Food Grade Lubricants approved for incidental food contact (H1-certified). Learn more here. For more information, contact us.