合成橡胶工业090610-橡胶技术网 www.sto.net.cn

	合成橡胶工业 CHINA SYNTHETIC RUBBER INDUSTRY 2009 Vol.32 No.6 P.485-489

水性聚氨酯/苯丙复合乳液的合成及其在表面施胶中的应用

查瑞涛　王东红　蓝江华　仇国贤　潘泉利　

摘　要：以N-甲基二乙醇胺(MDEA)为扩链剂制备了水性聚氨酯(PU)乳液,并用其与苯乙烯(St)、丙烯酸丁酯(BA)和丙烯酸羟乙酯混合单体制备了PU/苯丙(PUA)复合乳液,用傅里叶变换红外光谱表征了复合乳液的结构,考察了PU及复合乳液性能的影响因素,并研究了复合乳液的表面施胶性能.结果表明,在-NCO/-OH(摩尔比)为1.7～1.9、MDEA质量分数为10%、中和度为100%的条件下,合成了平均粒径为75 nm左右的水性PU;当反应温度为80 ℃时,PUA复合乳液呈乳白色且无凝胶产生;当BA∶ St(质量比)为1.5～2.0∶ 1.0时,PUA复合乳液的抗水性较好;当BA质量分数由30%增加到40%时,PUA复合乳液的粒径增大,粒径分布变宽;在室温下用质量分数为0.2%的PUA复合乳液对原纸进行表面施胶时,纸张的施胶度达到33%;在105 ℃下,仅需很短的熟化时间下机纸张的施胶度可达95%.
关键词：N-甲基二乙醇胺;水性聚氨酯;苯乙烯;丙烯酸丁酯;丙烯酸羟乙酯;苯丙乳液;表面施胶
分类号：TQ323.8 　文献标识码：B
文章编号：1000-1255(2009)06-0485-05

Preparation of hydrophilic polyurethane/styrene-acrylate emulsion and their application in surface sizing

Cha Ruitao（Mudanjiang Hengfeng Paper Co Ltd, Mudanjiang 157013, China;Tianjin Key Laboratory of Pulp and Paper, College of Meterials Science and Engineering, Tianjin University of Science & Technology,Tianjin 300457, China）　 Wang Donghong（Refinery of Lanzhou Petrochemical Company, PetroChina, Lanzhou 730060, China）　 Lan Jianghua（Tianjin Key Laboratory of Pulp and Paper, College of Meterials Science and Engineering, Tianjin University of Science & Technology,Tianjin 300457, China）　 Qiu Guoxian（Lanzhou Petrochemical Research Center, PtroChina, Lanzhou 730060, China）　 Pan Quanli（Mudanjiang Hengfeng Paper Co Ltd, Mudanjiang 157013, China）　

Abstract：Hydrophilic polyurethane(PU) was synthesized with N-methyldiethanolamine(MDEA) as chain exdtender, and PU/styrene-acrylate (PUA) emulsion was prepared with styrene and butyl acrylate as monomers and PU as seed emulsifier. The structure of PUA emulsion was characterized by Fourier transform infrared spectroscopy. Effect factors on the properties of PU and PUA emulsions were investigated, and the performance of surface sizing of PUA was researched as well. The results showed that the average size of PU was 75 nm at -NCO/-OH(mole ratio) from 1.7 to 1.9, mass fraction of MDEA of 10% and neutral degree of 100%. PUA emulsion was milky white and no gel produced at reaction temperature of 80 ℃. The PUA emulsion had good water resistance at BA/St(mass distribution widened when mass fraction of BA increased from 30% to 40%. The sizing degree of base paper reached 33% at mass fraction of PUA of 0.2% and room temperature, and the sizing degree reached 95% after the paper was aged at 105 ℃ for a short time.
Keywords：N-methyldiethanolamine; hydrophilic polyurethane; styrene; butyl acrylate; ethoxyl acrylate; styrene-acrylate emulsion; surface sizing

基金项目：天津科技大学引进人才基金资助项目(20060437).
作者简介：查瑞涛(1979-),男,博士,讲师,牡丹江恒丰纸业股份有限公司在站博士后.已发表论文6篇.
作者单位：查瑞涛（牡丹江恒丰纸业股份有限公司,黑龙江,牡丹江157013;天津科技大学,材料科学与化学工程学院天津市制浆造纸重点实验室,天津,300457）　
　　　　　王东红（中国石油兰州石化公司,炼油厂,甘肃,兰州,730060）　
　　　　　蓝江华（天津科技大学,材料科学与化学工程学院天津市制浆造纸重点实验室,天津,300457）　
　　　　　仇国贤（中国石油兰州化工研究中心,甘肃,兰州730060）　
　　　　　潘泉利（牡丹江恒丰纸业股份有限公司,黑龙江,牡丹江157013）　

参考文献：

[1]Shiraishi N.Biodegradable plastic[M].Tokyo:C M C editorial staff,1992:123-135.
[2]王志杰,李佩燚.聚氨酯化对纸张性能的影响及其机理[J].纸和造纸,2006,25(1):48-52.
[3]范建云,王鹏,杨志勇,等.木质纤维素-聚氨酯共聚型高强度功能纸张的研究[J].包装工程,2006,27(1):4-6.
[4]Hatakeyama H,Hirose S,Hatakeyama T,et al.Biodegradable polyurethanes from plant components[J].J Macromal Sci:Pure Appl Chem(A),1995,A 34(4):43-50.
[5]Kim B K,Lee Y M.Aqueous dispersion of polyurethane containing ionic and non-ionic hydrophilic segments[J].Journal of Applied Polymer Science,1994,54(12):1809-1815.

收稿日期：2008年11月17日

修稿日期：2009年6月17日

出版日期：2009年11月15日