申请人:KANSAI PAINT CO., LTD.
公开号:EP2818252A1
公开(公告)日:2014-12-31
An object of the present disclosure is to provide a method of forming a multilayer coating film that forms a multilayer coating film with excellent smoothness, distinctness of image, adhesion and water resistance when a plurality of uncured coating films are cured at once, and especially when they are cured at once at low temperature. The method of the present disclosure is as follows.
A method of forming a multilayer coating film comprising the following steps 1-1 to 1-4: step 1-1: a step of coating an article to be coated with a primer coating composition (X) and forming an uncured primer coating film on the article to be coated, step 1-2: a step of coating the article to be coated having the uncured primer coating film with an aqueous colored coating composition (Y1) for a base coat, to form an uncured base coat coating film thereover, step 1-3: a step of coating the article to be coated having the uncured primer coating film and uncured base coat coating film, with a clear coating composition (Z), and forming an uncured clear coating film thereover, and step 1-4: a step of curing the uncured primer coating film, the uncured base coat coating film and the uncured clear coating film by heating them.
本公开的一个目的是提供一种形成多层涂膜的方法,当多层未固化的涂膜一次固化时,尤其是在低温下一次固化时,该方法可形成平滑度、图像清晰度、附着力和耐水性极佳的多层涂膜。本公开的方法如下。
一种形成多层涂膜的方法,包括以下步骤 1-1 至 1-4: 步骤 1-1:用底涂涂料组合物(X)涂覆待涂覆物品并在待涂覆物品上形成未固化底涂涂膜的步骤, 步骤 1-2:用水性有色涂料组合物(Y1)涂覆具有未固化底涂涂膜的待涂覆物品,以作为底涂,在其上形成未固化底涂涂膜的步骤, 步骤 1-3:在具有未固化底漆涂膜和未固化基漆涂膜的待涂物品上涂覆透明涂料组合物 (Z),并在其上形成未固化透明涂膜的步骤,以及步骤 1-4:通过加热固化未固化底漆涂膜、未固化基漆涂膜和未固化透明涂膜的步骤。