METHOD FOR PREPARING RADIATION CURED THREE-COAT PAINTED METAL PLATE

• Main Authors: MAEKITA AKIHIKO, TOMOSUE TAKAO, YAMABE HIDETOSHI, MORI KOJI, MASUHARA KENICHI
• Format: Patent
• Language: English
• Published: 07.05.1987
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; PERFORMING OPERATIONS; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING

PURPOSE:To contrive to enhance top coat capacity, by applying a radiation curable paint compounded with a monomer excellent in the compatibility with an intermediate coat film and swelling said film onto a two-coat two-bake painted steel plate due to conventional thermosetting paint. CONSTITUTION:A top coat film by radiation curable paint is formed to a painted steel plate to which two-coat two-bake painting was applied in a conventional precoat steel plate painting line. Herein, if paint which is based on a radiation curable resin wherein the parameter difference of solubility of the resin thereof to an intermediate coat film resin is 1 or less and a monomer swelling said intermediate coat film resin is applied as top coat, the close adhesiveness with the intermediate coat film is excellent and the hardness, antistaining property, gloss and sharpness of the film are also enhanced. Further, top coat prepared by adding 3pts.wt. or less pigment to 100pts.wt. of the main components of the top coat can be applied in a dry film thickness of 5-15mum.