Isosorbide-based polyurethane acrylate resins

A new paper discusses the synthesis of renewable isosorbide-based polyurethane acrylate resins for UV-cured coating with adjustable properties.

Isosorbide is a starch derivative obtained from the dehydration of d-sorbitol derived from corn syrup. Image source: Marima - (symbol image).

Isosorbide (IS) is an ideal bio-based monomer capable of preparing high-performance polymeric materials to substitute petroleum-based materials. During the stduy, IS is applied as source material to prepare polyurethane acrylate resins (PUA-ISCL2/4/6/8) and ultimately for the preparation of UV-cured coatings. By tuning the amount of ε-caprolactone (CL) in the structure, the resulting coatings exhibit adjustable viscosity, thermal stability and mechanical properties with good hydrophilicity.

Good prospects for practical applications

The prepared UV-cured coatings displayed a suitable pencil hardness of 3H as well as a high glass transition temperature (Tg) of 74 °C. According to the researchers, their work proposes to prepare UV-cured coatings with excellent overall performance by regulating the ratio of IS and CL, which has good prospects for practical applications.

The study has been published in Progress in Organic Coatings, Volume 182, September 2023.

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