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Monday, 16 September 2019
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Raw materials & technologies, Raw materials, Coatings binders

Coatings binders: investigating isosorbide-based epoxy resins

Friday, 22 August 2014

Water soluble epoxy resins were prepared from diglycidyl ethers of isosorbide (DGEI) and isosorbide diamine (ISODA).

Researchers investigated influences and properties of new epoxy resins polymers

Source: Franz Pfluegl/Fotolia

Researchers investigated influences and properties of new epoxy resins polymers

Source: Franz Pfluegl/Fotolia

Researchers from Kansas Polymer Research Center, Pittsburg State University, investigated the effect of synthesis methods on the structure of DGEI and ISODA and their influence on properties of cured resins, and compared with bisphenol A commercial epoxy resins (DGEBA).

Extensive research is necessary to improve hydrolytic stability

DGEI and DGEBA were cured with diethylene triamine (DETA) and ISODA to give optically clear yellow to brown epoxy resins of different degrees of crosslinking. All systems containing isosorbide either on the epoxy or amine side were faster than the standard petrochemical epoxy resin (DGEBA/DETA). The glass transition of isosorbide-based resins was about 60°C lower than those of DGEBA/DETA. The effect of DGEI molecular weight on properties of cured resins was tested. Isosorbide-based epoxy resins displayed equal or better tensile and impact strength than commercial epoxy resins and are a viable replacement for DGEBA resins but extensive research is necessary to improve hydrolytic stability.

The study is published in: Polymer Chemistry, Issue 18, 2014.

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