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題名 | 氣乾型水性胺基醇酸樹脂之研究--塗料之分子量、粘度、穩定性、乾燥時間及硬化動力學= |
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作者 | 黃金城; 劉正字; |
期刊 | 林產工業 |
出版日期 | 19950600 |
卷期 | 14:2 1995.06[民84.06] |
頁次 | 頁120-148 |
分類號 | 465.65 |
語文 | chi |
關鍵詞 | 水溶油變性胺基醇酸樹脂; 木材塗裝; 分子量; 粘度; 穩定性; 乾燥時間; 硬化動力學; 中和劑; 偶合溶劑; Water-reducible amino alkyd resin; Wood coatings; Molecular weight; Viscosity; Drying time; Stability; Thermal behaviour; Neutralising agents; Cosolvents; |
中文摘要 | 自製三種水溶油變性醇酸樹脂,配合高亞胺型三聚氰胺樹脂架橋劑,胺中和劑及其他添加劑,調配成氣乾型水性塗料,使用膠體滲透色層分析儀(GPC)粘度流變儀,乾燥時間記錄儀,霍氏轉換紅外線光譜儀(FTIR),示差掃瞄熱卡儀(DSC),探討樹脂塗料之基本性質,結果歸納如下:1. 樹脂塗料系統之分子量、粘度、穩定性及乾燥性質受乾性油、中和劑、偶合溶劑等因素所影響。桐油/篦麻油者顯示最高分子量及粘度,依次為大豆油及亞麻仁油者;乙二胺中和之塗料具有最佳穩定性及低粘度,氨者則穩定性最差。含亞麻仁油變性之結合劑、氯中和劑及EGMBE偶合溶劑之配方,塗膜乾燥速度最快。2. 高亞胺型甲基化三聚氰胺樹脂對水溶油變性醇酸樹脂,具有顯著促進塗膜乾燥之效果,但經FTIR分析,則架橋機構不明顯。從DSC試驗知,水性塗料系統,在溶劑揮發階段,呈現吸熱峰,壓住自氧化之放熱反應,待溶劑至109°C完全揮發後,則顯出平緩的放熱現象,係高溫下胺基醇酸樹脂之架橋反應。又知塗膜乾燥速度與醇酸樹脂之碘價呈正相關,與塗料之速率常數的自然對數(In Z)及活化能(Ea)則具負相關,此三項性質與塗膜乾燥速度之關係,非常顯著。 |
英文摘要 | First make the 3 kinds of drying oils for manufacturing air dried water-reducible alkyd resins, then blend with a high imino methylated melamine resin crosslinker, neutralising agents and other additives for wood coatings and the paint's properties were investigated. The molecular weight and its distribution was determined by Gel Permeation Chromatography (GPC). The rheological measurement by Viscometer. The drying time of film was obtained by drying recorder. The crosslinking reection was determined by Fourier Transfrom Infrared Spectroscopy (FTIR). Differential Scanning Calorimetry (DSC) was used to evaluate the curing kinetics. It is found that the nature of drying oils, neutralising agents, cosolvents were all factors which may significantly influence molecular weight, viscosity , stability , drying time and curing kinetics of the paints. Also resin using the tung/castor oil generally reveal a higher molecular weight and viscosity than those using soybean or linseed oil. The diethylamine neutralising agent for paints exhibits the best stability and lower viscosity. In contrast, ammonia exhibits less stable behaviour. The paints which included resin using linseed oil, ammonia and butyl cellosolve (EGMBE), reveal to be quickest drying time. Here, the drying time of the film was found significantly decrease, due to blending the with high imino methylated melamine resin. But the crosslinking peak was very weak on the FTIR plot. It was found that below 109 °C solvent evaporation stage, there is an exothermic peak would suppress the DSC exotherm associated with the autooxidative crossinking reaction. But above 109 °C the nsolvent completely evaporated, there is an exothermic reastion, thus the crosslinking resaction of amino alkyd resin at high temperature was demonstrated. It was found that solvent may significantly influence thermal behaviour, and it was found that concentration of more iodine value of alkyd resin and lesser preexponential constant (In Z) and activation energy of paints generally exhibits a lesser drying time. |
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