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环氧树脂的水性化

文章来源:环氧树脂   作者:环氧树脂   发布时间:2019-04-15 10:21   浏览次数:

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目前,制备水性环氧树脂体系的方法主要有4种:直接乳化法、相反转乳化法、自乳化法以及固化剂乳化法。

环氧树脂

1、直接乳化法

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2、相反转乳化法

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环氧树脂

3、自乳化法

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环氧树脂

4、环氧树脂固化剂乳化法

这类体系中的环氧树脂一般预先不乳化,而由水性环氧固化剂在使用前混合乳化,因而这类固化剂要既是交联剂又是乳化剂。水性环氧固化剂是以多胺为基础,对多胺固化剂进行加成、接枝、扩链和封端,在其分子中引入具有表面活性作用的非离子型表面活性链段,对低分子量的液体环氧树脂具有良好的乳化作用。用固化剂乳化法制备水性环氧树脂体系的优势是在使用前由固化剂直接乳化环氧树脂,不需考虑环氧树脂乳液的储存稳定性和冻融稳定性;缺点是配得的乳液适用期短。

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