公开(公告)号：US6166123A

公开(公告)日：2000-12-26

申请号：US946507

申请日：1997-10-07

申请人： Walter J. Blatter ,  Thomas J. Crompton ,  Gregory D. Walls

发明人： Walter J. Blatter ,  Thomas J. Crompton ,  Gregory D. Walls

IPC分类号： C08J3/20 ,  C09D5/03 ,  C09D5/36 ,  C08J5/10 ,  C08K3/08 ,  C08L31/00

CPC分类号： C09D5/032 ,  C08J3/203 ,  C09D5/36

摘要： A method of manufacturing powder coating compositions, the powder coating compositions, and cured coatings made from the coating compositions are described. The method of preparing the coating compositions comprises combining a preformulated thermally softenable resin powder (having a defined T.sub.g) and a reflective pigments (such as a non-leafing or leafing metallic flake, mica, optically variable pigment, and the like) and then mixing the powder and flake under high shear conditions and assuring that the average temperature of the mixture remains below the T.sub.g of the resin during the high speed mixing process. The powder coating compositions are free of pasted aluminum flake and comprise thermally softenable resin particles having a number average diameter of between 15 and 60 microns, leafed metallic flakes having a number average maximum diameter of between 4 and 45 microns, said powder when coated onto a metallic surface in a thickness of at least 10 microns and melted and cured, providing a reflectivity of at least 400 at 20 degrees viewing angle. The resultant coating may also be free of the plasticizer, solvent or thickener used in pasted aluminum.

摘要翻译： 描述了由涂料组合物制备粉末涂料组合物，粉末涂料组合物和固化涂层的方法。 制备涂料组合物的方法包括将预制的可热软化的树脂粉末（具有确定的Tg）和反射颜料（例如非漂浮或漂浮的金属薄片，云母，光学可变颜料等）组合，然后混合 在高剪切条件下粉末和薄片，并确保在高速混合过程中混合物的平均温度保持低于树脂的Tg。 粉末涂料组合物不含糊状的铝薄片，并且包括数均平均直径为15至60微米的热软化树脂颗粒，数均平均最大直径为4至45微米的叶状金属薄片，所述粉末涂覆在 金属表面，其厚度至少为10微米，并熔化和固化，在20度视角下提供至少400的反射率。 所得到的涂层也可以不含粘合铝中使用的增塑剂，溶剂或增稠剂。