Chemicals & Polymers Blog

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The Impact of Different Polyols on the Properties of Coatings, Adhesives, Sealants and Elastomers

We have written in this space about different performance polyols used to achieve the desired performance of elastomers in various applications. In addition to the disocianate type, polyols offer formulators an ability to achieve a variety of processing and performance advantages.

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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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