Environment-friendly UV-curable alkyd-based non-isocyanate urethanes

IF 2.3 4区材料科学 Q2 Chemistry Journal of Coatings Technology and Research Pub Date : 2022-06-29 DOI:10.1007/s11998-022-00623-z

Ilknur Babahan-Bircan, Jomin Thomas, Mark D. Soucek

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引用次数: 4

Abstract

Two non-isocyanate polyurethanes (NIPUs) were used as reactive diluents for an alkyd to obtain eco-friendly new UV-curable alkyd-polyurethane coatings. A linseed-based alkyd resin was prepared and formulated with the reactive diluents (NIPUs) and free radical photoinitiator, and then UV-cured. NMRs were used to characterize the alkyd and NIPUs and glass transition temperature (T_g) of cured alkyd-polyurethanes were evaluated by using DSC. Further, spectroscopy and thermal stability of the coatings were evaluated by using ATR-IR spectroscopy and thermogravimetric analysis (TGA), respectively. Moreover, coating properties such as pencil hardness, cross-cut adhesion, pull-off adhesion, impact resistance, and reverse impact resistance were also evaluated. It was found that crosslink density, pencil hardness, adhesion, and T_g were dependent and proportional to the amount of the NIPUs (reactive diluents) showing significant improvement in mechanical and thermal properties compared to the linseed-based alkyd resin.

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环保型紫外光固化醇酸基非异氰酸酯聚氨酯

采用两种非异氰酸酯聚氨酯(nipu)作为醇酸反应稀释剂，制备了一种新型的可紫外光固化醇酸聚氨酯涂料。以活性稀释剂(NIPUs)和自由基光引发剂为原料制备了亚麻籽基醇酸树脂，并进行了紫外光固化。用nmr表征了醇酸和nipu，用DSC评价了固化后醇酸聚氨酯的玻璃化转变温度(Tg)。利用ATR-IR光谱和热重分析(TGA)分别对涂层的光谱和热稳定性进行了评价。此外，还评估了涂层的铅笔硬度、横切附着力、拉脱附着力、抗冲击性和抗反向冲击性等性能。研究发现，与亚麻籽基醇酸树脂相比，交联密度、铅笔硬度、附着力和Tg与nipu(反应稀释剂)的用量成正比，在机械和热性能上有显著改善。

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来源期刊

Journal of Coatings Technology and Research CHEMISTRY, APPLIED-MATERIALS SCIENCE, COATINGS & FILMS

CiteScore

4.40

自引率

8.70%

发文量

期刊介绍： Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.