| 新型TMPLA水性聚氨酯分散体的合成及助成膜性能 |
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| 引用本文： | 徐雪,钟尚富,朱延安,瞿金清.新型TMPLA水性聚氨酯分散体的合成及助成膜性能[J].化工学报,2016,67(5):2124-2130. |
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| 作者姓名： | 徐雪 钟尚富 朱延安 瞿金清 |
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| 作者单位： | 1.华南理工大学化学与化工学院, 广东 广州 510640;2.嘉宝莉化工集团股份公司, 广东 江门 529085 |
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| 基金项目： | 广东省自然科学基金项目(2015A030313205);广东省省级科技计划项目(2015A010105010);广东省省部产学研结合重大专项项目(2012A090300004)。 |
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| 摘 要： | 合成了新型扩链剂三羟甲基丙烷月桂酸单酯(TMPLA)并制备聚氨酯水分散体(n-PUD),取代小分子成膜助剂辅助高玻璃化温度(Tg)聚丙烯酸酯乳液(PA)成膜,以制备高性能超低挥发性有机化合物(VOC)含量水性木器涂料。研究了软/硬段质量比、NCO/OH及TMPLA/BDO摩尔比对n-PUD助成膜性能的影响。结果表明:随软/硬段质量比和NCO/OH摩尔比降低,PUD的助成膜能力增强;TMPLA引入能显著提高n-PUD的助成膜能力,优选TMPLA/BDO摩尔比4/2,NCO/OH摩尔比1.3,软/硬段质量比55/45时,n-PUD/PA按质量比25/75复配乳液在不加成膜助剂条件下能够在5℃形成连续透明成膜,制备的水性木器涂料VOC含量低至30 g·L-1。
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| 关 键 词： | 合成 助成膜性能 水性聚氨酯分散体 聚合 最低成膜温度 粒度分布 水性木器涂料 |
| 收稿时间： | 2015-11-16 |
| 修稿时间： | 2015-12-29 |
Synthesis and film-forming performance of novel polyurethane aqueous dispersions |
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| XU Xue,ZHONG Shangfu,ZHU Yan'an,QU Jinqing.Synthesis and film-forming performance of novel polyurethane aqueous dispersions[J].Journal of Chemical Industry and Engineering(China),2016,67(5):2124-2130. |
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| Authors: | XU Xue ZHONG Shangfu ZHU Yan'an QU Jinqing |
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| Affiliation: | 1.School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China;2.Carpoly Chemical Group Co. Ltd., Jiangmen 529085, Guangdong, China |
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| Abstract: | The novel diol chain-extender trimethylol propane monolaurate (TMPLA) was synthesized to prepare novel polyurethane aqueous dispersions (n-PUD),which was used as a coalescent to assist the film forming of high Tg polyacrylate emulsion. Effects of NCO/OH molar ratio, soft/hard segment contents and molar ratio of TMPLA/BDO on assistant-film-forming performance of n-PUD were studied. It was found that the assistant-film-forming ability of PUD was increased with decreasing of NCO/OH molar ratio and hard segment proportions. PUDs modified with TMPLA displayed good assistant-film-forming ability. The optimized conditions to prepare assistant-film-forming n-PUD were as follows: molar ratios of TMPLA/BDO and NCO/OH were 4/2 and 1.3, respectively, mass ratio of soft/hard segment was 55/45, and then the blended latex with m(PUD)/m(PA) 25/75 can form a continuous transparent film at 5℃ without coalescent with a VOC content as low as 30 g·L-1. |
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| Keywords: | synthesis assistant-film-forming performance polyurethane aqueous dispersions polymerization minimum film forming temperature particle size distribution wood paints |
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