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水性双组分聚氨酯柔感涂料的制备及性能

Keywords: 水性涂料,双组份,柔感涂料,聚氨酯

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Abstract:

以自制聚酯多元醇、二异氰酸酯为原料分别合成含羟基端水性聚氨酯及水性聚氨酯,并以亲水性脂肪族聚异氰酸酯为固化剂,添加适量助剂配制水性双组分聚氨酯柔感涂料.考察了聚酯多元醇的相对分子质量、二羟基丙酸(DMPA)的用量、—OH/—NCO比例等与涂料的稳定性、铅笔硬度、附着力、柔韧性、耐水性、耐溶剂性、耐化学品性、耐刮伤性以及耐化妆品性之间的关系.研究结果发现:合成水性聚氨酯分散体所用的聚酯多元醇的相对分子质量为2000,DMPA质量分数为6%,合成羟基端水性聚氨酯分散体中—OH/—NCO=1.6,固化过程中—NCO/—OH=1.5~1.6时,涂料的综合性能最好.

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