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題 名 | 光安定劑配方對聚胺基甲酸酯透明塗裝櫟木耐候性改善效果之比較=Comparison of the Effectiveness of UV-Stabilizers on the Weatherability Improvement of Clear PU-Coated Oak |
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作 者 | 葉汀峰; 張上鎮; | 書刊名 | 國立臺灣大學農學院實驗林研究報告 |
卷 期 | 11:3=217 1997.09[民86.09] |
頁 次 | 頁19-29 |
分類號 | 474.33 |
關鍵詞 | 聚胺基甲酸酯塗料; 紫外光安定劑; 耐候性; 變色; 色差值; 光澤度留存率; Polyurethane coating; UV-stabilizer; Weatherability; Discoloration; Color difference; Gloss retention; |
語 文 | 中文(Chinese) |
中文摘要 | 為瞭解光安定劑種類、添加量與配方對抑制櫟木天候變色的效果,本試驗選用兩 型四種不同的光安定劑( BTA 型光安定劑:Tinuvin-1130 與 Tinuvin-384; HALS 型光安 定劑:Tinuvin-292 與 Tinuvin-123 ),以不同的比例, 單獨或混合添加於芳香族聚胺基 甲酸酯( PU )透明塗料中,然後塗佈於櫟木表面,經由室外耐候試驗後,分析比較塗裝試 材的各項性質變化。試驗結果顯示,添加適宜的光安定劑對抑制塗膜的表面變色及改善光澤 度留存率可獲得良好的效果。於芳香族 PU 透明塗料中僅單獨添加 HALS 型光安定劑,對塗 裝櫟木的天候變色並沒有抑制效果; 而單獨添加 BTA 型光安定劑時,抑制變色效果則較單 獨添加 HALS 型光安定劑為佳;如果將 BTA 型光安定劑和 Tinuvin-292 光安定劑混合使用 , 則對於芳香族 PU 透明塗裝櫟木天候變色的抑制效果比僅添加 BTA 型光安定劑者略佳; 又這些含光安定劑的塗膜經耐候試驗後之光澤度留存率均較未含光安定劑者高。 至於 BTA 型光安定劑添加量對抑制 PU 塗裝材天候變色及改善光澤度留存率之效果,2% 添加量較 1% 為佳。 在所測試的光安定劑配方中, 改善 PU 塗裝木材天候變色效果最好者為同時添加 2% Tinuvin-1130 與 1% Tinuvin-292 兩種光安定劑。 |
英文摘要 | In order to understand the effect of different types, different amounts and mixed formulation of UV-stabilizers on the discoloration prevention of oak coated with aromatic polyurethane (PU) clear finishes during weathering, two types of UV-stabilizers, benzotriazoles (BTA; Tinuvin-1130 and Tinuvin-384) and hindered amine light stabilizers (HALS; Tinuvin-292 and Tinuvin-123), were added to aromatic PU clear coatings. After outdoor weathering, variations in the properties of coated oak were evaluated. The results indicated that, by the addition of appropriate UV-stabilizers, improvement on the discoloration prevention of coated wood and on the gloss retention of film can be achieved during weathering. The discoloration of aromatic PU clear coated oak can be retarded by the addition of BTA but not by that of HALS. The improvement on the weatherability of aromatic PU clear coating containing both BTA and Tinuvin-292 is slightly better than that containing only BTA. It was proven that all coatings containing stabilizers possess better gloss retention than that without stabilizers. Comparing the effectiveness provided by the different amounts of BTA, wood coated with PU clear coating containing 2% stabilizer possesses better weatherability and gloss retention than that containing 1% stabilizer. Among the UV-stabilizer formulations studied, the best one against weathering discoloration is the coating containing both 2% Tinuvin-1130 and 1% Tinuvin-292. |
本系統中英文摘要資訊取自各篇刊載內容。