Environmentally-friendly UV-curable coatings utilizing bio-based polyester acrylates

An environmentally-friendly synthesis method of bio-based polyester acrylate that is useful for UV-curable coating was studied. In this study, itaconic acid and ethoxylated diglycerol were used for polyester acrylate as bio-based moieties. While the radical copolymerizability of itaconoyl groups wit...

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Bibliographic Details
Published in:Progress in organic coatings 2023-02, Vol.175, p.107356, Article 107356
Main Authors: Iso, Takamasa, Ninomiya, Takeru, Kagami, Shinobu, Kubota, Kouzou, Sanai, Yasuyuki
Format: Article
Language:English
Subjects:
Bio-based
Cross-linking
Itaconic acid
Polyester acrylate
UV-curing
Waterborne coating
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Summary:An environmentally-friendly synthesis method of bio-based polyester acrylate that is useful for UV-curable coating was studied. In this study, itaconic acid and ethoxylated diglycerol were used for polyester acrylate as bio-based moieties. While the radical copolymerizability of itaconoyl groups with acryloyl groups has not been sufficiently proven yet, the introduction of itaconoyl groups into polymer side chains is expected to enhance the cross-linking density. On the other hand, ethoxylated diglyceryl moieties contribute to rapid UV-curing due to its multifunctionalities, which yield cross-linked polymer. The common manufacturing processes of acrylates emit large amounts of aqueous solutions. In general, the neutralized aqueous layer is to be disposed of as wastewater. On the other hand, the neutralized aqueous layer in this study was able to be converted into a waterborne coating. Oligomers were prepared with high biomass content and high yields while discharging a smaller amount of wastewater. The resultant polyester acrylates from both the organic and aqueous layers are useful for UV-curable coatings. [Display omitted] •Environmentally-friendly coating•Bio-based acrylate•Reduction of wastewater
ISSN:0300-9440
DOI:10.1016/j.porgcoat.2022.107356