不同聚醇比例及分散劑探討水性顏料於水性聚氨酯的分散性研究

Study on Dispersion of Waterborne Pigments in Waterborne Polyurethane by Different Polyol Ratio and Dispersants

篠原勝治(K. J. Shinohara) ； 翁崇鈞(C. J. Wong)

《紡織綜合研究期刊》 30卷2期 (2020/04) Pp. 34-40

https://doi.org/10.6439/TTRJ.202004_30(2).0005

摘要

水性聚氨酯（Waterborne polyurethane，WPU）大量用來替代天然皮革製品，但有色PU皮革彩度常不足。本研究合成3種不同聚醇比例（Polyol%：55、57.5、60）的WPU及使用不同類型的分散劑，與顏料攪拌混合後，製備成薄膜，利用示差掃描卡計觀測顏料於樹脂間的分佈情形。另外將配置好的塗料塗於織物上，使用分光光度測色儀分析彩度，實驗結果顯示在聚醇比55%～60%之間，聚醇比越高，彩度越低。有色WPU於硬鏈段Tg點發生變化，表示顏料於硬鏈段間的染色效果較大。

關鍵字

水性聚氨酯 ； 彩度 ； 聚醇比 ； 人工皮革

並列摘要

Waterborne polyurethane (WPU) can be used in the field of artificial leather. It is one of the alternatives that replace natural leather products. However, for colored PU leather, the color is usually dull and not bright. In this study, three different polyol ratios (55%, 57.5%, 60%) of WPU were synthesized, and different types of dispersants were used. After mixing with pigments, a film was prepared and use Differential Scanning Calorimetry (DSC) to observed the pigment distribution of the resin. In addition, the colored WPU coating is applied to the fabric, and the chroma is analyzed by a spectrophotometer. The experimental results show that different polyol ratio between 55% and 60%, when increased the polyol ratio, the colored WPU's chroma was lower. The colored WPU changes significantly at the Tg point of the hard segment and indicating that the dyeing effect of the pigment was large with the hard segments.

並列關鍵字

WPU ； chroma ； polyol ratio ； artificial leather