| 提高水性聚氨酯耐水性的研究 |
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| 引用本文： | 陈红梅,廖时勇,张爱民.提高水性聚氨酯耐水性的研究[J].中国胶粘剂,2009,18(1). |
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| 作者姓名： | 陈红梅 廖时勇 张爱民 |
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| 作者单位： | 四川大学高分子研究所,高分子材料工程国家重点实验室,四川,成都,610065 |
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| 摘 要： | 为了制备耐水性能较好的水性聚氨酯(WPU),以聚酯二元醇(PBA)、甲苯二异氰酸酯(TDI)和二羟甲基丙酸(DMPA)等为主要原料合成了WPU乳液,着重探讨了DMPA含量、R值即n(-NCO)/n(-OH)]和交联剂对WPU胶膜耐水性能的影响。实验结果表明,当w(DMPA)=4%、R=1.5时,制得的WPU胶膜耐水性较好;采用不同的室温交联剂对WPU进行交联改性,当w(氮丙啶型交联剂A)=3%时(相对于WPU乳液干固量而言),WPU胶膜的吸水率降低至3%左右,并具有较好的持久耐水性。
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| 关 键 词： | 水性聚氨酯 高耐水性 室温交联剂 |
Study on improving water resistance of waterborne polyurethane |
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| CHEN Hong-mei,LIAO Shi-yong,ZHANG Ai-min.Study on improving water resistance of waterborne polyurethane[J].China Adhesives,2009,18(1). |
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| Authors: | CHEN Hong-mei LIAO Shi-yong ZHANG Ai-min |
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| Affiliation: | Polymer Research Institute;State Key Laboratory of Polymer Material and Engineering;Sichuan University;Chengdu 610065;China |
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| Abstract: | In order to prepare waterborne polyurethane(WPU) with better water resistance, the WPU emulsion was synthesized with polyester diol(PBA), toluene diisocyanate(TDI) and 2,2-dimethylol propionic acid (DMPA) as main raw materials. The influences of DMPA content, R value(namely molar ratio of -NCO to -OH) and cross linker were elaborated on water resistance of WPU pliofilm. The experiment results showed that the WPU pliofilm had better water resistance when mass fraction of DMPA was 4% and R value was 1.5. When... |
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| Keywords: | waterborne polyurethane excellent water resistance room temperature cross linker |
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