New Additive to Eliminate Pinholes for Water-based Coating Formulations

Reader Jim; VabOosterwijk Jos; Xu Caixuan; Dai Ye; Mertsch Ruediger; McAuliffe Shauna; Tang Jianchang

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New Additive to Eliminate Pinholes for Water-based Coating Formulations

机译：用于消除水基涂料配方的针孔的新添加剂

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Pinholes are a problem for formulators developing fast-drying, water-based coatings, especially in coatings cured at high temperature and applied at high wet film thickness. Pinholes are often caused by air or solvent vapor release from the film when the coating is too viscous to flow back and repair the holes. Pinholes also occur in baked coatings, as the trapped vapor regains mobility when the coating softens under heating, before crosslinking hardens the film, preventing flow back into the voids.

机译：针孔是开发快干水基涂料的配方设计师面临的一个问题，尤其是在高温固化、湿膜厚度较高的涂料中。针孔通常是由于涂层粘性太大，无法流回并修复针孔时，空气或溶剂蒸汽从薄膜中释放而造成的。烘烤涂层中也会出现针孔，因为在交联硬化薄膜之前，当涂层在加热下软化时，捕获的蒸汽会重新流动，防止流回空隙。

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来源
《JCT coatingstech》 |2021年第3期|共8页
作者
Reader Jim; VabOosterwijk Jos; Xu Caixuan; Dai Ye; Mertsch Ruediger; McAuliffe Shauna; Tang Jianchang;
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Evonik Corp 2 Turner Pl Piscataway NJ 08854 USA;

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原文格式 PDF
正文语种 eng
中图分类涂料工业;
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New Additive to Eliminate Pinholes for Water-based Coating Formulations

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