端羟基硅氧烷改性的高固含率水性聚氨酯的合成及性能研究.pdf

石油化
PETROCHEMICAL TECHNOLOGY
2011年第40卷第12期
端羟基硅氧烷改性的高固含率水性聚氨酯的
合成及性能研究
杜鄂',王哲',夏汉忠,周太炎1,蔡小燕,任筱芳
(1.常州大学石油化工学院,江苏常州213164;2.昆山华育合成皮革有限公司,江苏昆山21537)
摘要」以聚四氢呋喃二醇、聚己二酸乙二醇酯、端羟基硅氧烷和异佛尔酮二异氰酸酯等为主要原料,以2,2-二羟甲基丙酸
(DMPA)和磺酸型扩链剂(HSJ)为亲水扩链剂,采用自乳化和外乳化相结合的方法合成了阴离子型高固含率水性聚氨酯(WPU)
考察了扩链剂外乳化剂和端羟基硅氧烷的用量对WPじ乳液和胶膜性能的影响;采用FIR、倒置荧光相差显微镜对WPU进行了
结构表征,采用TG技术对WPU胶膜的热性能进行了分析。实验结果表明,当体系中DMPA、HSJ、外乳化剂、端羟基硅氧烷的质
量分数分别別为1.6%,0.25%,1.6%,2.0%时,合成的WPU乳液黏度低、稳定性好、固含率可达53%左右,WPU胶膜的耐水性和
耐热性好,性能与进口试样相近
L关键词」磺酸型扩链剂;水性聚氨酯;端羟基硅氧烷
[文章编号!1000-8144(2011)12-1342-06
L中图分类号」TQ436.3
[文献标识码]A
Synthesis and Properties of High-solid Content Waterborne Polyurethane Modified by
Siloxane with Hydroxyl-terminated Group
Du Ying, Wang Zhe Xia Hanhong, Zhou Taiyan, Cai Xiaoyan, Ren Xiaofang
(1. College of Petrochemical Engineering, Changzhou University, Changzhou Jiangsu 213164, China
2. Kunshanhuafu Synthetic Leather Ltd, Kunshan Jiangsu 215337, China
L Abstract] Anionic waterborne polyurethane( WPU)with high-solid content was synthesized througl
emulsion and self-emulsion methods from polytetrahydrofuran glycol, polyethylene glycol adipate
siloxane with hydroxyl-terminated group(SHG)and isoflurane ketone isocyanate, with 2
dimethylol propionic acid(DMPA and sulfonate(HSJ )as hydrophilic chain extenders. The effects o
the chain extenders, emulsifier and SHG dosages on the propertics of WPU emulsion and film were
studied. The structure of WPU was characterized by means of FTIR and fluorescence phase contrast
microscope, and its thermal property was analyzed by means of TG. The results indicated that in the
reaction system with 1. 6%(w)DMPA, 0.25%(w)HSJ, 1.6%(w)emulsifier and 2.0%(w)
SHG, the synthesized WPU emulsion with 53%(w)solid content has low viscosity and good stability
and the thermal stability and water resistance of WUP film are as good as commercial products
L Keywords sulfonate hydrophilic chain extender; waterborne polyurethane; siloxane with hydroxyl
terminated group
水性聚氨酯(WPU)具有无毒、不燃、无污染等致胶膜的耐水性下降,难以满足使用要求。端羟基
优点,已被广泛应用于皮革涂饰、汽车涂装、纤维处硅氧烷的表面能较低,在成膜过程中易于向膜表面
理、造纸助剂和胶黏剂等领域。但WPU比相同富集,可赋予改性聚合物涂膜优良的耐水、耐油污
固含卒的溶剂型聚氨酯干燥时间长,使其生产周期及机械性能。目前,用于改性WPU的端羟基硅氧
延长。合成固含率高、耐水性好、黏度低的WPU是烷主要有羟基砫氧烷和氨基聚住氧烷,通过含有羟
近年研究的热点。
收稿日期2011-(06-22:[修改稿日期」2011-08-20
提高WPU固含率的方法主要是引入亲水性强作者简介」郢(1957-),女,河北省平山县人,硕土,教授,电话
的磺酸型扩链剂2。但磺酸基的亲水性过强,导13952171,电邮duys2063.c0m