纖維泥水泥板用塗料耐候性之研究

本試驗選取商用聚酯、環氧樹脂及聚胺基甲酸酯等塗料，經調配後塗裝於自行研製之纖維泥水泥板基材上；而後分別進行戶外曝露及室內照光試驗。試驗結果歸納如後： 1．色差值常被用為塗膜變色之評估標準，試驗結果顯示灰色聚胺基甲酸酯塗膜為測試塗膜中變色最輕微者，透明塗膜則以聚酯塗膜之變色程度最輕微。 2．塗膜60°光澤度在戶外或室內照光試驗皆呈明顯之衰減趨勢：塗膜明度留存率在室內照光下多呈明顯提升，而在戶外曝露下多半呈現衰減之趨勢。 3．室內照光處理之塗膜表面在掃描式電子顯微鏡下呈現不規則龜裂現象，戶外曝露處理之塗膜則多呈粗糙及蝕刻現象。

關鍵字

纖維泥水泥板；耐候性；耐光性

並列摘要

The main purpose of this study is to investigate the weatherability and colorfastness of coatings applied on sludge-cement fiberboard. Six kinds of commercial coatings, including polyurethane, unsaturated polyester and epoxy resin coatings were examined in this experiment. After exposure to the outdoors for 16 weeks and UV-light accelerated aging chamber for 64 days respectively, deterioration of such properties as color difference, brightness retention and 60° gloss of coatings on sludge-cement fiberboard, were examined. The experimental results are as follows: 1. Experimental results showed that the color difference value may be used as an evaluation indicator of coating film properties. Among those finishes studied, the clear unsaturated polyester film revealed the least degree of color difference, while the highest stability of discoloration was displayed by the gray polyurethane film. 2. After natural and artificial aging treatments, the 60° gloss of coated surface parameter revealed remarkable deterioration trends. The brightness retention of coated surfaces showed lower trends during outdoor exposure, hut opposite results accurred in samples treated by UV-light. 3. From SEM images of the coated surfaces, it was observed that cracks and/or checks occurred after 64 days UV-light accelerated aging, and surfaces showed roughness and/or corroded phenomenon when exposed to the outdoors for 16 weeks.

並列關鍵字

sludge-cement fiberboard ； weatherability ； colorfastness

國際替代計量

纖維泥水泥板用塗料耐候性之研究

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