聚氨基甲酸酯(以下稱為PU)發泡是很重要的用途。發泡方法大致分為2種方法，物理發泡和化學發泡。物理發泡是活用發泡劑的發泡、機械發泡等。化學發泡是由與Isocyanate化合物和水反應發生二氧化碳氣體的發泡。研究化學發泡體。簡單只加水、發泡體的泡沫會粗，且手感有偏硬的傾向。此研究為了活用水性樹脂中的水、以添加預聚物且分散在水性樹脂中。為了改良對水性樹脂分散性、活用自身乳化型預聚物（親水基：COOH基）。研究針對黏度、分散性、發泡性、穩定性與預聚物的相關性進行探討，其中預聚物的COOH％控制在0.5％～1.0％；預聚物的NCO％是3％～7％時，該發泡體氣泡細、柔軟、且Pot-life比較長。預聚物添加量要40％～80％。另外本樹脂除了作為發泡體亦可當接著劑用。
Polyurethane foaming is a very important. Foaming method can be divided into two kinds of methods, physical foaming and chemical foaming. The physical foaming is the foaming of the foaming agent, the mechanical foaming. Chemical foaming is caused by the reaction of the isocyanate compound with water to produce a carbon dioxide gas. This study is the chemical foam. If simply add water, then the foam will be thick and rigid. In order to utilize the water of aqueous resin, it is decided to add the pre-polymer and disperse it in the aqueous resin. In order to improve the dispersibility of the aqueous resin, we used emulsified pre-polymer (hydrophilic group: COOH group). The COOH% of the pre-polymer was controlled at 0.5% to 1.0%; the NCO% of the pre-polymer was 3% to 7%, and the COOH% of the pre-polymer was controlled at 0.5% to 1.0%, the foam bubbles are thin, soft, and Pot-life is long. The amount of pre-polymer added is 40% to 80%. In addition, the resin may be used as adhesive agent.
