The present invention provides a UV-crosslinked hot-melt pressure-sensitive adhesive used for a polyvinyl chloride (PVC) insulation adhesive tape, made by mixing a polymer of vinyl monomers, functional monomers, special soft monomers, and photoinitiators with a tackifying resin and an antioxidant in certain proportions; the composition of the photoinitiator polymer contains a copolymer of one or more polymerizable photosensitive initiators and acrylate monomers, or a mixture of oligomers of one or more polymerizable photosensitive initiators and acrylate high polymers. The PVC adhesive tape made using such a pressure-sensitive adhesive has the advantages of excellent mechanical properties, bonding performance, and resistance to high temperatures, and is energy-saving and environmentally friendly; the present invention overcomes the defect of the prior art that a relatively long thermal oven is needed to volatilize a solvent in the glue when coating a PVC adhesive tape, which is applicable for wrapping and strapping cable bundles in different positions of the body of an automobile, can satisfy the requirement for uses on high temperature-resistant positions of an engine inside the automobile, and reaches a long-term temperature resistance level of 125°C.
本发明提供了一种用于聚
氯乙烯(P
VC)绝缘胶带的紫外交联热熔压敏胶,由
乙烯基单体、功能性单体、特种软单体和光
引发剂的聚合物与增粘
树脂和
抗氧剂按一定比例混合制成;光
引发剂聚合物的组成含有一种或多种可聚合光敏
引发剂和
丙烯酸酯单体的共聚物,或一种或多种可聚合光敏
引发剂和
丙烯酸酯高聚物的低聚物的混合物。使用这种压敏胶制成的聚
氯乙烯胶带具有机械性能、粘接性能和耐高温性能优异,节能环保的优点;本发明克服了现有技术中涂布聚
氯乙烯胶带时需要经过较长时间的热烘箱才能挥发胶
水中溶剂的缺陷,适用于汽车车身不同位置的电缆束的缠绕捆扎,能满足汽车内部发动机耐高温位置的使用要求,长期耐温等级达到125℃。