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涂料工业  2013 

高固含量羧酸/磺酸盐型水性聚氨酯乳液的合成

Keywords: 水性聚氨酯,自乳化,高固含量,磺酸盐

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Abstract:

?以聚己二酸-1,4-丁二醇酯(pba)和异佛尔酮二异氰酸酯(ipdi)为原料,以乙二胺基乙磺酸钠(aas)和二羟甲基丙酸(dmpa)为亲水扩链剂制备了高固含量羧酸/磺酸盐型水性聚氨酯乳液。聚氨酯薄膜经红外光谱分析证实聚氨酯分子中含有磺酸基团。系统研究了—nco/—oh物质的量比(r值)、dmpa含量和aas含量对乳液及胶膜性能的影响。研究结果表明:当r值为1.6、dmpa含量为0.8%~1.0%、aas含量为3.5%时,获得的乳液和胶膜的综合性能最佳。

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