| 温度和锡催化剂对WPU反应速率影响及乳化反应条件选择 |
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| 引用本文： | 郭超,赵殊,王兴宁,梁志彬. 温度和锡催化剂对WPU反应速率影响及乳化反应条件选择[J]. 中国胶粘剂, 2010, 19(8) |
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| 作者姓名： | 郭超 赵殊 王兴宁 梁志彬 |
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| 作者单位： | 黑龙江省阻燃材料分子设计与制备重点实验室,东北林业大学理学院,黑龙江,哈尔滨,150040 |
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| 基金项目： | 国家科技支撑计划课题资助项目 |
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| 摘 要： | 以2,4-甲苯二异氰酸酯(TDI)、聚乙二醇(PEG)及N-甲基二乙醇胺(MDEA)等为原料,制备出一种亲水性阳离子型水性聚氨酯(WPU)乳液。通过跟踪测定预聚体中-NCO含量,分析了温度和锡催化剂用量对PU(聚氨酯)预聚反应速率的影响,并对后续乳化反应条件进行了选择。结果表明:PU预聚反应速率随温度升高和催化剂用量增加而增大;当温度为60℃、w(催化剂)=1.0%时,预聚反应迅速且平稳。采用低温乳化、先中和后乳化、将中间体加入水中以及低搅拌速率等方法,可以得到分散性好、气泡量低且性能稳定的WPU乳液。
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| 关 键 词： | 水性聚氨酯 乳液 催化剂 反应速率 乳化条件 |
Selection of emulsification condition and influences of temperature and tin-containing catalyst on reaction speed of waterborne polyurethane |
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| GUO Chao,ZHAO Shu,WANG Xing-ning,LIANG Zhi-bin. Selection of emulsification condition and influences of temperature and tin-containing catalyst on reaction speed of waterborne polyurethane[J]. China Adhesives, 2010, 19(8) |
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| Authors: | GUO Chao ZHAO Shu WANG Xing-ning LIANG Zhi-bin |
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| Affiliation: | GUO Chao,ZHAO Shu,WANG Xing-ning,LIANG Zhi-bin(Heilongjiang Key Lab of Molecule Design and Preparation of Flame Retardant Materials,College of Science,Northeast Forestry University,Harbin 150040,China) |
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| Abstract: | A hydrophilic cationic waterborne polyurethane(WPU) emulsion was prepared with 2,4-toluene diisocyanate(TDI),polyglycol(PEG) and N-methyl diethanolamine(MDEA) as raw materials.The influences of temperature and tin-containing catalyst contents were analysed on reaction speed of PU(polyurethane) prepoly-merization by tracing-NCO contents in the prepolymer,and the post-emulsification conditions were selected.The results showed that the reaction speed of PU prepolymerization was increased with increasing temper... |
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| Keywords: | WPU emulsion catalyzer reaction speed emulsification condition |
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