低气味高可再生碳含量植物油基巯基-烯UV固化涂料

Thiol-ene UV-curable coating is “green” to environment, no oxygen inhibition and low stress-induced shrinkage exist in the process of curing, curing reaction can proceed without the presence of photoinitiator; Plant oil-based polymer resin used in coatings has excellent mechanical properties and pigment wettability. Thiol-ene coupling and epoxy ring opening reactions have many advantages, such as the simple reaction conditions, the versatility of molecular design, the wide monomer suitability. The purpose of this study is to combine the excellent properties of plant oil-based resin and the advantages of thiol-ene UV polymerization, to prepare some renewable oligomers with low odour and excellent performance for UV-curable pigmented coatings. There are only few researches on that have been reported. The specific goals of this project include: 1) preparing the plant oil-based polythiol and polyene by modifying plant oils and their derivatives via thiol-ene coupling and epoxy ring opening reactions, 2) preparing the fully plant oil-based thiol-ene UV-curable coatings. The effect of types of plant oil-based polythiol, polyene and renewable diluents containing ring structure to coating’s performance will be systematically studied. The application of designed plant oil-based UV-curable oligomers in the field of UV-curable pigmented coating and UV deep curing system will be investigated.

巯基-烯UV固化涂料“绿色”环保、固化过程不受氧阻聚、涂层收缩应力低、可在无光引发剂引发下固化；植物油基聚合物作为涂料用树脂具有优良的力学性能和颜料润湿性能；巯基-烯“点击”反应及环氧开环反应条件简单、分子设计能力强、适用单体广。本研究的主要目的是将植物油基树脂低粘度、颜料润湿好的优良性能与巯基-烯UV固化体系的优点相结合，期望为UV色漆提供低气味、性能优良的功能化可再生预聚物，这方面国内外的研究很少。本项目的具体目标如下：采用巯基-烯“点击”及环氧开环反应改性植物油及其脂肪酸衍生物制备低气味植物油基多元硫醇与具有高可再生碳含量的植物油基多元烯，将两者复合，通过巯基-烯光交联聚合形成UV固化涂层。系统研究植物油基多元硫醇的气味影响因素；不同植物油基多元硫醇、植物油基多元烯及含环状结构的可再生活性稀释剂对涂层性能的影响；探索植物油基巯基-烯UV固化体系在UV色漆及UV深层固化体系中的应用。

本项目采用巯基-烯“点击”及酯化反应改性植物油及其脂肪酸衍生物，制备低气味植物油基多元硫醇与具有高可再生碳含量的植物油基多元烯，将两者复合，通过巯基-烯光交联聚合形成UV固化涂层。系统研究植物油基多元硫醇的气味影响因素；不同植物油基多元硫醇、植物油基多元烯及含环状结构的可再生活性稀释剂对涂层性能的影响。还在可低温固化的乙酰乙酰基改性植物油的制备及固化方面做了大量的工作；并尝试了通过巯基-烯乳液聚合制备硫醇型环氧固化剂及乳液型可UV固化水性树脂，项目在以下方面积累了一些具有应用潜力的工作如：碳碳双键官能度可控的含100%可再生碳的高度支化植物油基预聚物、含100%可再生碳的含环状结构的UV固化稀释剂及可低温固化的乙酰乙酰基植物油。四年内共计发表SCI论文11篇；中文核心论文16篇；申请9项中国发明专利，其中授权7项，有一些成果仍在整理中。本项目的研究为植物油及其衍生物在涂料中的应用提供了实验基础和理论指导。