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首页> 外文期刊>Journal of coatings technology and research >Ascorbic acid ester in ambient temperature cure coatings
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Ascorbic acid ester in ambient temperature cure coatings

机译：常温固化涂料中的抗坏血酸酯

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Ascorbic acid was reacted with t-butyl acetoacetate under relatively mild conditions to obtain a multifunctional β-ketoester. ~1H-NMR spectroscopy and elemental analysis showed that the high-yield desired product was obtained and with a degree of substitution between 2 and 3. This β-ketoester was used to make a simple coatings mixture, which was, in turn, used to coat metal panels. Crosslinking was attempted using multifunctional amines, but this proved to be too rapid for any reasonable films to be made. Michael addition with multifunctional acrylates proved to be controllable by adjusting the catalyst level. The films obtained proved to have high levels of solvent resistance, high hardness, good gloss, and low impact strength. Gel content measurements and large increases in the glass transition temperature (T_g) of the cured films indicated that high levels of crosslinking have been obtained.
机译：使抗坏血酸与乙酰乙酸叔丁酯在相对温和的条件下反应，以获得多功能的β-酮酸酯。 〜1 H-NMR光谱和元素分析表明，获得了高产率的所需产物，其取代度为2至3。该β-酮酸酯用于制备简单的涂料混合物，然后将其用于涂金属板。尝试使用多功能胺进行交联，但事实证明，这种交联太快，无法制作任何合理的薄膜。事实证明，通过调节催化剂用量可以控制迈克尔与多官能丙烯酸酯的加成。所获得的膜被证明具有高水平的耐溶剂性，高硬度，良好的光泽度和较低的冲击强度。凝胶含量的测量和固化膜的玻璃化转变温度（T_g）的大幅提高表明已获得高水平的交联。

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