彩涂卷涂料的成膜物质性能和特点

在彩涂卷涂料上成膜物质一般包括:油脂、天然树脂、酚醛树脂、沥青、醇酸树脂、氨基脂、纤维素、过氯乙烯树脂、烯类树脂、丙烯酸类树脂、聚酯树脂、环氧树脂、聚氨酯树脂、元素有机化合物、橡胶、其他(无机高分子,二甲苯树脂等)。

彩涂卷涂料成膜物质一般分为两类:第一类在成膜过程类成膜物质称为非转化型成膜物质,它们具有热塑性,受热软化,彩涂卷涂料冷却后又变硬等特点。另一类是指在成膜过程中组成结构发生变化,即成膜物质形成与原来组成结构完全不相同的涂膜,称为转化型成膜物质,这类成膜物质在热,氧或其他物质作用下能够聚合成与原来组成不同的不溶的网状高聚物成膜物质的功能是将颜、彩涂卷涂料填料与树脂结合在一起,在基板上形成均一、致密的涂膜固化后形成涂层,它是涂料的基础,决定了涂料对基板的附着力、涂层的物理、化学和力学性能。

Film forming materials on coatings generally include: grease, natural resin, phenolic resin, asphalt, alkyd resin, amino resin, cellulose, perchloroethylene resin, olefin resin, acrylic resin, polyester resin, epoxy resin, polyurethane resin, elemental organic compounds, rubber, other (inorganic polymer, xylene resin, etc.). The film-forming materials are generally divided into two types: the first type in the film-forming process is called non transformed film-forming materials, which are thermoplastic, softened by heat and hardened after cooling. The other type refers to the change of composition and structure in the film-forming process, that is, the film-forming material forms a film with completely different composition and structure from the original film, which is called conversion type film-forming material. This type of film-forming material can polymerize into insoluble network polymer with different composition under the action of heat, oxygen or other substances. The function of film-forming material is to combine the pigment, filler and resin, It is the basis of coating, which determines the adhesion of coating to substrate and the physical, chemical and mechanical properties of coating.