醇酸樹脂製造聚胺酯發泡體之探討

Investigation on the Manufacturing of Polyurethane Foam from Alkyd Resins

本研究以乙二醇（E）與己二酸（A）及鄰苯二甲酸酐（P）反應合成脂肪族醇酸樹脂（EA）及芳香族醇酸樹脂（E-P），並將其分別與HDI、PMDI、Desmodur L、Desmodur N 等四種異氰酸酯混合調配製造PU 發泡體。由結果得知，醇酸樹脂與異氰酸酯種類會影響所製造PU 發泡體之性質，其中脂肪族醇酸樹脂（E-A）配合脂肪族異氰酸酯（HDI、Desmodur N）可有較佳之發泡結果，而芳香族醇酸樹脂（E-P）則須配合芳香族異氰酸酯（PMDI、Desmodur L）。又（E-A）與Desmodur N所調配製造之發泡體具柔軟、強韌性質，且吸水性佳，（E-P）與PMDI 所調配製造之發泡體則屬於硬質發泡體。而（E-A）與HDI 所調配製造之發泡體缺乏強度，且浸水時發生崩解狀態，（E-P）與Desmodur L 所調配製造之發泡體則發泡率偏低，缺乏做為發泡體或彈性體之特性。 In this study, ethylene glycol (E) would react with adipic acid (A) or phthalic anhydride (P), and aliphatic alkyd resin (E-A) and aromatic alkyd resin (E-P) were prepared, respectively. These two alkyd resins were blended with isocyanate compound, such as HDI, PMDI, Desmodur N and Desmodur L, to make PU foams. The results showed that properties of PU foams would depend on the kinds of alkyd resin and isocyanate compound, aliphatic alkyd resin (E-A) should blend with aliphatic isocyanate compound (HDI, Desmodur N) and aromatic alkyd resin (E-P) should blend with aromatic isocyanate compound (PMDI, Desmodur L). PU foams made from blending (E-A) with Desmodur N had soft and toughness mechanical properties, and had good water absorption capability. PU foams made from blending (E-P) with PMDI had properties belonged to hard foam. PU foams made from blending (E-A) with HDI lacked mechanical strength, and would collapse when soaked in water. PU foams made from blending (E-P) with Desmodur L did not have enough foaming rate, could not be used as foam or elastomer.

In this study, ethylene glycol (E) would react with adipic acid (A) or phthalic anhydride (P), and aliphatic alkyd resin (E-A) and aromatic alkyd resin (E-P) were prepared, respectively. These two alkyd resins were blended with isocyanate compound, such as HDI, PMDI, Desmodur N and Desmodur L, to make PU foams. The results showed that properties of PU foams would depend on the kinds of alkyd resin and isocyanate compound, aliphatic alkyd resin (E-A) should blend with aliphatic isocyanate compound (HDI, Desmodur N) and aromatic alkyd resin (E-P) should blend with aromatic isocyanate compound (PMDI, Desmodur L). PU foams made from blending (E-A) with Desmodur N had soft and toughness mechanical properties, and had good water absorption capability. PU foams made from blending (E-P) with PMDI had properties belonged to hard foam. PU foams made from blending (E-A) with HDI lacked mechanical strength, and would collapse when soaked in water. PU foams made from blending (E-P) with Desmodur L did not have enough foaming rate, could not be used as foam or elastomer.