丙烯酸酯改性水性聚氨酯乳液的合成及胶膜性能  

Synthesis of Aqueous Polyurethane Modified by Acrylate Emulsion and Its Film Properties

作　　者：王学川[1] 宗奕珊[1] 强涛涛[1] 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021

出　　处：《精细化工》2014年第1期79-84,共6页Fine Chemicals

基　　金：国家自然基金项目(21276151);陕西省教育厅科技计划项目(2011SZS007);中国博士后科学基金资助项目(2012M521733);陕西科技大学研究生创新基金~~

摘　　要：以异佛尔酮二异氰酸酯(IPDI)、聚碳酸酯二醇(PCDL)、二羟甲基丙酸(DMPA)、三乙胺(TEA)、甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)为原料,采用原位乳液聚合法制备水性聚氨酯-丙烯酸酯(WPUA)复合乳液。考察了聚氨酯(PU)质量分数、m(MMA)∶m(BA)、初始—NCO与—OH摩尔比等因素对WPUA复合乳液及其胶膜性能的影响。结果显示,当w(PU)=80%、初始n(—NCO)/n(—OH)=6.0、w(DMPA)=5%、m(MMA)∶m(BA)=4∶6时,所得WPUA乳液性能稳定,其胶膜吸水率降低至9.80%,相比较未改性的聚氨酯胶膜的吸水率24.75%,其吸水率降低了60.4%;改性胶膜的拉伸强度达到28.9 MPa,是未改性聚氨酯胶膜的1.53倍,制备出了性能稳定、具有优异耐水性和物理机械性能的WPUA复合乳液。With IPDI, PCDL, DMPA,TEA, MMA and BA as the basic raw materials, a hybrid emulsion of waterborne polyurethane-acrylate （WPUA） was prepared by in-situ emulsion copolymerization method. The effects of PU content,mass ratio of MMA to BA,the n（-NCO）/n（-OH） and the amount of DMPA on the properties of the emulsion and coating film were systematically studied. The results show that, when the PU quality score was 80%, the initial molar ratio of the -NCO and -OH value was 6.0,using DMPA with mass fraction at 5% ,and the m（MMA） ：m（BA） at 4：6,the WPUA hybrid emulsion showed a stable performance. Compared with the bibulous rate of 24.75% of the unmodified PU film,the water absorption of the WPUA film was reduced by 60. 4% ,reaching 9. 80%, and the tensile strength of the modified film increased by 1.53 times of the PU film, reaching 28.9 MPa. All the results show that the stable WPUA emulsion was prepared, and it exhibits superior performance in water resistance and physical and mechanical properties.

关 键 词：水性聚氨酯 丙烯酸酯 改性 皮革化学品 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]