Mechanism of Acid Rain Etching of Acrylic-Melamine Clearcoats

• MORI Kanji

  TOYOTA Central Research & Development Labs., Inc.

• TACHI Kazuyuki

  TOYOTA Central Research & Development Labs., Inc.

• MURAMATSU Masataka

  TOYOTA Motor Corporation

• ASAI Mikio

  TOYOTA Motor Corporation

Bibliographic Information

Other Title

• 酸性雨によるアクリルメラミン塗膜のエッチング機構 (第2報)
• 酸性雨によるアクリルメラミン塗膜のエッチング機構(第2報)硫酸によるメラミン樹脂の抽出
• サンセイ ウ ニ ヨル アクリルメラミン トマク ノ エッチング キコウ ダイ
• 硫酸によるメラミン樹脂の抽出
• Extraction of Melamine Resin by Concentrated Sulfuric Acid

Abstract

The mechanism of acid rain etching of acrylic-melamine clearcoats has been studied using 70 wt% sulfuric acid as a model reagent for concentrated acid rain on automotive bodies. Free acrylic-melamine coating films were immersed in 70 wt% sulfuric acid at 60°C and the extracted substances were analyzed by IR and elemental analysis.<BR>It was found that the extracted substances contained triazine structure and had elemental composition of a partial-methylolmelamine. These results indicated that sulfuric acid decomposed melamine-crosslinker to partial-methylolmelamine but not to water-soluble compounds such as cyanuric acid.<BR>The acid rain etching is caused by the extraction of the melamine resin by the concentrated sulfuric acid.

Journal

• Journal of the Japan Society of Colour Material

  Journal of the Japan Society of Colour Material 71 (12), 741-745, 1998

  Japan Society of Colour Material

Keywords

• Acid rain
• Etching
• Acrylic-melamine coatings
• Concentrated sulfuric acid

Details

• CRID: 1390282680446498304
• NII Article ID: 10002482822
• NII Article ID: 10007150275
• NII Book ID: AN00354634
• DOI: 10.4011/shikizai1937.71.741
• COI: 1:CAS:528:DyaK1MXns1ersQ%3D%3D
• NDL BIB ID: 4629863
• ISSN: 0010180X
• ISSN: http://id.crossref.org/issn/0010180X
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4629863
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed