光点击化学修饰石油树脂研究

为改善传统石油树脂改性方法能耗高、效率低等缺陷,本文应用点击化学,在常温下,以甲苯为溶剂,以Darocur1173为光引发剂,在UV-LED灯辐照下,通过3-巯基丙酸与DCPD石油树脂发生巯基-烯加成反应,制备的产物命名为DCPD-COOH。以三苯基膦为催化剂,用甲基丙烯酸缩水甘油酯(GMA)与DCPD-COOH反应,制备了可光固化的丙烯酸酯石油树脂,命名为DCPD-A。固化漆膜的设计配方:DCPD-A(50份)、活性稀释剂甲基丙烯酸羟乙酯(HEMA,50份),光引发剂Darocur1173(5份)。在该配方下制得的固化漆膜其附着力达到0级,铅笔硬度为2H。制备的DCPD-A与极性溶剂或者极性树脂的相容性较好,可应用于光固化涂料和光固化油墨等领域。

Modification of Petroleum Resins by Photo-induced Click Chemistry

The traditional modification methods of the petroleum resins are always linked with high energy consumption and low efficiency, To overcome this drawbacks, the photo-induced click chemistry of 3-mercaptopropionic acid was utilized to modify a type of petroleum resin, DCPD, in this work. The reaction was carried out in toluene solution and at room temperature, using Darocur1173 as photoinitiator and a UV-LED lamp as light source. The resulting product is named as DCPD-COOH. In the presence of triphenyl phosphine, DCPD-COOH was allowed to react with glycidyl methacrylate (GMA)to transform to an acrylate petroleum resin, named as DCPD-A. Upon UV irradiation of a mixture of 50 portion of DCPD-A, 50 portion of a reactive diluent 2-hydroxyethyl methacrylate(HEMA), and 5 portion of Darocur1173, a UV-cured thin film with 0 level of adhesion and 2H of pencil hardness was prepared. The modified petroleum resin has good compatibility with polar solvent and resins, applicable as UV-curing coatings and inks.