Chalking

Japanese: chalking
Chalking

...Epoxy resin paints are characterized by their excellent adhesion, hardness, flexibility, water resistance, and chemical resistance. Weather resistance is insufficient because of discoloration and chalking (the phenomenon in which the pigment separates from the coating after painting, and the pigment or particles stick to the fingertips when the painted surface is touched). Applications include two-component room temperature curing tar epoxy resin paints (tar derivatives) for bridges, steel pipes, ship exteriors, tanks inside ships, oil tanks, and concrete surfaces, one-component room temperature and heated epoxy resin chemical resistant paints for the inner surfaces of chemical tanks, the inner and outer surfaces of various pipes, and machinery and equipment in chemical plants, epoxy resin can paints, which are often cross-linked with phenolic resin, for food cans, drums, tubes, and enamel for electric wires, and epoxy resin primers for room temperature and heated amino resin types for electrical equipment and automobiles.

*Some of the terminology that mentions "chalking" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…エポキシ樹脂塗料の特徴は付着性,硬度,たわみ性,耐水性,耐薬品性がきわめて優れていることである。耐候性は変色,チョーキングchalking(塗装後,顔料が塗膜から分離し,塗面に手を触れると指頭に顔料や粒子が付着する現象)などを起こすので不十分である。用途としては2液常温硬化型のタールエポキシ樹脂塗料(タール誘導体)が橋梁,鋼管,船舶外板,船舶内諸タンク,油類タンク,コンクリート面などに,1液常温型で加熱型もあるエポキシ樹脂耐薬品塗料は薬品タンク内面,各種管内外面,化学工場の機械設備に,フェノール樹脂で架橋させるものが多いエポキシ樹脂缶用塗料は食缶,ドラム缶,チューブ,電線用エナメルなどに,常温型でアミノ樹脂加熱型もあるエポキシ樹脂プライマーは電気機器,自動車などに使用される。…

※「chalking」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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