多官能度光活性单体对塑胶UV光油性能影响研究

Research on the effect of multifunctional photoactive monomer on the properties of plastic UV varnish

以六官能度及二官能度聚氨酯丙烯酸酯为预聚物,以二季戊四醇六丙烯酸酯(DPHA)及三环癸烷二甲醇二丙烯酸酯(DCPDA)为光活性单体,以1-羟基环己基苯基甲酮(184)为光引发剂制备了一种适用于热塑性银粉底漆上罩光的UV光油,研究了DPHA与DCPDA的比例对UV光油硬度、附着力、光泽度、耐水煮、高低温冲击性能的影响。研究结果表明,DPHA/DCPDA比例对UV光油性能影响较大,随着DPHA/DCPDA比例的增加,UV光油硬度由HB增加至2H,附着力由0级降至2级,光泽度由109 GU降低至93 GU,当DPHA/DCPDA比例为1∶3时,UV光油附着力、耐水煮性能、高低温冲击性能达到最佳。

A UV varnish suitable for coating on thermoplastic silver powder primers was prepared by using polyurethane acrylic acid with six functions and two functions as prepolymers,dipentaerythritol hexaacrylate(DPHA)and tricyclodecane dimethanol diacrylate(DCPDA)as photosensitive monomers,and 1-hydroxycyclohexyl phenyl ketone(184)as photoinitiator,and the effects of the ratio of DPHA to DCPDA on the hardness,adhesion,water resistance,gloss,high and low temperature impact properties of UV varnish were had studied.The results showed that the ratio of DPHA/DCPDA had a great influence on UV varnish performance.With the increase of DPHA/DCPDA ratio,the hardness of UV varnish increased from HB to 2 H,the adhesion decreased from grade 0 to grade 2,and the gloss decreased from 109 GU to 93 GU.When DPHA/DCPDA ratio was 1∶3,the adhesion,water resistance and high and low temperature impact performance of UV varnish reached the best.