无有机溶剂法合成水性聚氨酯-聚丙烯酸酯胶粘剂  

Systhesis and property of acrylate modified waterborne polyurethane adhesive by solvent-free method

作　　者：赖小娟[1,2] 宋沛艳 杜媛[1] 

机构地区：[1]陕西科技大学化学与化工学院,西安710021 [2]陕西农产品加工技术研究院,西安710021

出　　处：《化工新型材料》2016年第9期213-215,共3页New Chemical Materials

基　　金：陕西省工业科技攻关项目(2016GY-241);陕西省协同创新项目(2015XT-58);西安市科技计划项目(CXY1527)

摘　　要：采用羧酸型亲水扩链剂二羟甲基丁酸(DMBA)以及磺酸型亲水扩链剂2,4-二氨基苯磺酸钠(SDBS),选用乙烯基单体作为聚氨酯(PU)预聚合的连续相,制备了稳定的无挥发性有机溶剂(VOC)水性聚氨酯-聚丙烯酸酯(SPUA)胶粘剂。利用傅里叶变换红外光谱(FT-IR)对改性前后PU的分子结构进行分析对比,并考察了亲水扩链剂用量、聚丙烯酸酯(PA)含量对胶粘剂的耐水性、稳定性和力学性能的影响。结果表明。当SDBS含量为2%(wt,质量含量,下同),DMBA为4.5%,PA为25%时,SPUA胶粘剂的耐水性、稳定性和力学性能最佳,固含量可达43%。透射电镜(TEM)照片表明,SPUA乳胶粒呈圆球状,乳液平均粒径分布均匀。Waterborne polyurethane prepolymer was synthesized by using 2,2-dimethylol butyric acid（DMBA）and2,4-diaminobenzenes sulfonic acid sodium salt（SDBS）as hydrophilic chain extender agent.Vinyl monomer used as the continuous phase of polyurethane in pre-polymer preparation.And the solventless and stable polyurethane-polyacrylate（SPUA）adhesive emulsion with high solid content was obtained.The structure of film before and after modification were confirmed by fourier transform infrared spectroscopy（FT-IR）.The influences of SDBS,DMBA contents and PA content on the water resistance,stability and mechanical properties of adhesive emulsion and film were studied.When w（SDBS）=2%,w（DMBA）=4.5%,w（PA）=25%,the water resistance,stability,mechanical properties and stability of adhesive were the best,its solid content reached 43%.Transmission electron microscope（TEM）photos showed that SPUA emulsions dispersed well with neat appearance.

关 键 词：水性聚氨酯 无溶剂法 丙烯酸酯 胶粘剂 改性 

分 类 号：TQ433.43[化学工程]