Fouling acceleration test method and artificial fouling substance for fouling acceleration test

Abstract

Abstract Translated from Japanese (57)【要約】 【目的】自動車外板塗膜などの耐汚れ性などを評価する ために用いられ、実際の暴露試験と相関性の高い汚れ促 進試験方法を確立する。 【構成】粒径が小さい第１カーボンブラックと第１カー ボンブラックより粒径が大きな第２カーボンブラックと 粘土とからなり全カーボンブラックと粘土との重量比 （全カーボンブラック／粘土）が１／１〜１／２００の 範囲にある人工汚れ物質とｐＨが４未満の酸性水を塗膜 表面に付着させ、水分を乾燥させた後に塗膜に紫外線を 含む光を照射する工程を１サイクルとし、これを複数サ イクル繰り返すことを特徴とする。酸性水と紫外線で荒 れた塗膜に、色調と付着性が適切に調節された人工汚れ 物質が付着することで、実際の暴露試験による塗膜の汚 れを短期間で良く再現できる。 (57) [Summary] [Purpose] To establish a stain acceleration test method that is used to evaluate the stain resistance of automobile exterior coatings and has a high correlation with the actual exposure test. [Structure] A first carbon black having a small particle size, a second carbon black having a larger particle size than the first carbon black, and clay, and the weight ratio of all carbon black to clay (total carbon black / clay) is 1/1. The process of applying artificial dirt substances in the range of up to 1/200 and acidic water having a pH of less than 4 to the surface of the coating film, drying the water, and then irradiating the coating film with light including ultraviolet rays is defined as one cycle. Is repeated for a plurality of cycles. By attaching an artificial dirt substance whose color tone and adhesion are appropriately adjusted to the paint film roughened by acidic water and ultraviolet rays, the dirt of the paint film by an actual exposure test can be reproduced well in a short period of time.

Inventors

• 👤 Yoshiyuki Noritake
• 👤 義幸 則武
• 👤 Mamoru Sugiura
• 👤 護 杉浦

Bibliographic Details