Low dissipation factor epoxy coating powder
    18.
    发明授权
    Low dissipation factor epoxy coating powder 失效
    低耗散因子环氧涂料粉末

    公开(公告)号:US4241101A

    公开(公告)日:1980-12-23

    申请号:US39919

    申请日:1979-05-17

    摘要: A coating powder is disclosed which is prepared from a solventless non-aqueous composition of a solid epoxy resin having an epoxy equivalent weight of about 400 to about 8000, a Durran's softening point of at least 70.degree., a solid polyanhydride curing agent at least about 50 mole % of which is trimellitic anhydride, and a cross-linking agent having the general formula R.sub.3 SnX where each R is selected from alkyl, aryl, aralkyl, and alkaryl up to C.sub.20 and X is selected from acetate, propionate, butyrate, halogen, and hydroxyl. The composition is dry-blended and then melt-mixed at 50.degree. to 150.degree. C. To prepare the coating powder, it is then cooled, crushed, and ground to a particle size of less than 100 microns. The coating powder is electrostatically applied to a conductor and is cured above the melting point of the resin.

    摘要翻译: 公开了一种涂料粉末,其由环氧当量为约400至约8000,杜兰软化点至少为70的固体环氧树脂的无溶剂非水组合物制备,固体聚酐固化剂至少约 50摩尔%的偏苯三酸酐和具有通式R3SnX的交联剂,其中每个R选自烷基,芳基,芳烷基和烷芳基,直到C20,X选自乙酸酯,丙酸酯,丁酸酯,卤素, 和羟基。 将组合物干混,然后在50℃至150℃下熔融混合。为了制备涂层粉末,将其冷却,粉碎并研磨至小于100微米的粒度。 将涂层粉末静电施加到导体上,并在树脂的熔点之上固化。