UV厌氧胶的制备及其影响因素研究

以聚氨酯丙烯酸酯(PUA)为基体、甲基丙烯酸-β-羟乙酯(HEMA)为活性稀释剂、异丙苯过氧化氢(CHP)为引发剂、N,N′-二甲基苯胺为促进剂、糖精为助促进剂、二苯甲酮(BP)/叔胺为光引发剂和对苯二酚为稳定剂,采用双引发体系和双固化UV(紫外光)、厌氧固化]体系制备PUA基UV厌氧胶。通过单因素试验法优选出制备UV厌氧胶的最佳工艺条件。结果表明:当w(HEMA)=20%、w(CHP)=2%、w(光引发剂)=3.0%、w(N,N′-二甲基苯胺)=w(糖精)=0.8%和w(对苯二酚)=0.06%时,UV厌氧胶的综合性能良好,其光固化定位时间为8 s、剪切强度超过5 MPa。

Study on preparation and its influence factors of UV anaerobic adhesive

With polyurethane acrylate(PUA) as matrix,β-hydroxyethyl methacrylate(HEMA) as active thinner,cumene hydroperoxide(CHP) as initiator,N,N′-dimethylaniline as accelerant,saccharin as auxiliary accelerant,diphenyl ketone(BP)/tertiary amine as photoinitiator and hydroquinone as stabilizing agent,a PUA-based UV anaerobic adhesive was made by double initiator systems and double curing systems(UV curing and anaerobic curing).The optimal process conditions of preparing UV anaerobic adhesive were preferred by single-factor experiment method.The results showed that the UV anaerobic adhesive had better combination property because its light curing locating time was 8 s and shear strength was more than 5 MPa when mass fractions of HEMA,CHP,photoinitiator,N,N′-dimethylaniline,saccharin and hydroquinone were 20%,2%,3.0%,0.8%,0.8% and 0.06% respectively.