2019-12-23
氮丙啶交联剂在汽车涂料中的应用及其优势 随着汽车工业的不断发展,The performance requirements for automotive coatings are also increasing。Automotive coatings need to be more than just decorative,It also needs to have good abrasion resistance、Chemical and weather resistance。Aziridine crosslinker is a new type of crosslinker,Because of its unique chemical structure and excellent performance,It is becoming more and more widely used in automotive coatings。This article will introduce the application of aziridine crosslinker in automotive coatings and its advantages in detail。 氮丙啶交联剂的化学结构与反应机理 氮丙啶交联剂是一类含有氮丙啶环结构的化合物,Its molecular structure contains a ternary ring with high tension,so that it has high reactivity。at room temperature,Azionidine crosslinker can undergo ring-opening reaction with carboxyl and hydroxyl groups in coatings,A stable cross-linked network structure is formed。This reaction can be carried out not only at room temperature,The reaction rate and crosslinking density can also be further increased by heating。 氮丙啶交联剂在汽车涂料中的应用 氮丙啶交联剂在汽车涂料中的应用主要体现在以下几个方面: 1 提高涂层的耐磨性 汽车涂料在使用过程中会受到各种机械磨损,Such as sand and gravel impact、Car wash brush rubbing, etc。The azionidine crosslinker reacts by crosslinking with the resin in the coating,A dense cross-linked network structure is formed,This significantly increases the abrasion resistance of the coating。 2 增强涂层的耐化学性 汽车涂料在使用过程中会接触到各种化学物质,Such as gasoline、Oil、cleaning agents, etc。Aziridine crosslinkers can effectively improve the chemical resistance of coatings,Prevents the coating from being attacked by chemicals。 3 提高涂层的耐候性 汽车涂料需要长时间暴露在阳光、rainwater and other natural environments,The coating is required to have good weather resistance。Aziridine crosslinker by forming a stable cross-linking network structure,The weatherability of the coating can be significantly improved,Extend the life of the coating。 4 改善涂层的附着力 氮丙啶交联剂可以与涂料中的树脂发生化学反应,Forming a strong cross-linked structure,This improves the adhesion between the coating and the substrate,Prevents the coating from peeling。 Advantages of aziridine crosslinker 1 反应条件温和 氮丙啶交联剂可以在室温下与涂料中的羧基和羟基发生反应,No high-temperature curing is required,Save energy。 2 交联密度高 氮丙啶交联剂的三元环结构具有较高的反应活性,A high-density cross-linked network can be formed,Improve the mechanical properties and chemical resistance of coatings。 3 ...