摘要
采用环氧丙烯酸酯（PPG-EA）、甲苯-2,4-二异氰酸酯（TDI）、聚丙二醇（PPG）、二羟甲基丙酸（DM-PA）和丙烯酸羟乙酯（HEA）等制备了环氧丙烯酸酯改性光固化水性聚氨酯乳液（WPU）;研究了改性环氧丙烯酸酯用量、DMPA用量、n（—NCO）∶n（—OH）对乳液及涂膜性能的影响。结果表明：通过环氧丙烯酸酯改性的水性聚氨酯涂膜具有硬度高、耐水性和力学性能好的特点,并且克服了环氧树脂直接用于水性聚氨酯改性制备的乳液贮存稳定性差的不足。当改性环氧丙烯酸酯用量为6%-10%、DMPA用量为5.5%-7.5%、n（—NCO）∶n（—OH）为1.3-1.4时,UV固化水性聚氨酯乳液的综合性能较好。
The epoxy acrylic resin modified UV -curable waterborne polyurethane emulsion was prepared by using epoxy acrylic resin （ PPG - EA ）, toluene - 2,4 - diisocyanate （ TDI ）, polypropylene glycol （PPG）, dimethylol propionic acid （DMPA） and 2 - hydroxyethyl acrylate （HEA） as the main materials. Effects of the content of epoxy acrylic resin and DMPA and NCO/OH ratio on the properties of the WPU emulsion and the films were discussed. The film of waterborne polyurethane modified by epoxy acrylic resin is featured by its higher hardness, gold water resistance and mechanical properties. The stability of emulsion was improved considerably compared to WPU which was modified by epoxy resin only. The results showed that when the content of modified epoxy acrylic resin and DMPA was respectively 6% - 10% and 5.5% - 7.5% ,n（-NCO）： n （-OH） was 1.3 -1.4, the waterborne polyurethane emulsion modified by epoxy acrylic resin procideded good progerties.
出处
《涂料工业》
CAS
CSCD
2008年第12期34-37,41,共5页
Paint & Coatings Industry
关键词
水性聚氨酯
改性环氧丙烯酸酯
耐水性
力学性能
稳定性
waterborne polyurethane
modified with epoxy acrylic resin
water resistance
mechanical property
stability
