本研究主要探討丙烯酸變性聚胺酯樹脂系乳液基質之水性與長油型變性醇酸樹脂基質之油性木材塗料換合錯酸銘偶合劑（Aluminum zirconate coupling agent）對戶外塗裝材耐候性能之改善效果。試樣放置於奥萬大國家森林遊樂區（經度121°10'58”E、緯度23°56'43”N）戶外曝露1年及QUV加速紫外光耐候試驗機照光劣化l,080h（1.5個月）。所得結果得知，水性木材塗料底漆添加1〜2%鋯酸鋁偶合劑者，無論在天然及人工加速耐候試驗後皆較油性木材塗料及未添加者，具有較高的光澤保留率、較穩定的黃色指數及較低色差值。就外觀而言，能夠減緩塗裝材黑黴菌或龜裂之發生。TGA熱重分析結果顯示，添加2%銼酸鋁偶合劑較未添加及添加1%锆酸鋁偶合劑者較能夠延長其裂解溫度。就FTIR光譜分析發現，塗裝材較未塗裝材具有較佳的耐候性，水性系木材塗料添加锆酸鋁偶合劑比油性系者耐候性佳。

This study aims to explore the improvement effects of water base acrylic modified polyurethane resin emulsion and oil-borne long oil modified alkyd resin matrix of wood coatings blending with aluminum zirconate coupling agent to the weathering performance of the outdoor coated woods. The coated woods were placed in Aowanda National Forest Recreation Area (Longitude 121 °10’58”E, Latitude 23°56’43”N) for one year and in the QUV accelerated UV weather resistance tester for 1080 hours (1.5 months). Based on the results, we found that waterborne wood coatings adding with 1-2% aluminum zirconate coupling agent showed better gloss retention rate, gentle yellow index and low value changes of color difference than either oil-borne wood coatings or without adding coupling agent in both of the natural and artificial accelerated weathering tests. As for the appearance of the coated woods, adding aluminum zirconate coupling agent in outdoor using water-borne wood coatings diminished the melanomyces or the occurrence of cracks. The thermogravimetric analysis (TGA) results indicated that adding 2% aluminum zirconate coupling agent can delay the pyrolysis temperature compared with those without adding or adding with 1% aluminum zirconate coupling agent. According to FTIR spectroscopy analysis, the coated wood appeared better weathering performance than the uncoated wood, and the water-based wood coating added with aluminum zirconate coupling agent also showed better weathering performance than those with oily types.