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Chemicals & Polymers Blog

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Making the CASE for Polycaprolactone Polyols

Polycaprolactone polyols are considered a special class of aliphatic polyester polyols, used as the soft block segment of high-performance polyurethane elastomers. The polycaprolactone polyols can be produced with very low acid values; perfect end-termination functionality; and narrow molecular weight distributions (MWD). These features manifest themselves in polyurethanes characterized by the following property profile, many of which are best-in-class performance attributes.

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Making the CASE for Polyurethane Elastomers: Polyether Polyols vs. Polyester Polyols

CASE (Coatings, Adhesives, Sealants, and Elastomers), foam and elastic fiber applications all utilize a diverse family of polyols that includes:

  • Polytetramethylene ether glycols (PTMEG)
  • Polypropylene glycols (PPG)
  • Adipate- and phthalate-based polyesters
  • Polycaprolactone polyols
  • Polycarbonate polyols

Selecting the best polyol for specific formula can be the difference between making a high quality product or a low performance one. The key for making a proper material selection is a good understanding of the inherent characteristics of each polyol chemistry.

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