| 摘要 |
PROBLEM TO BE SOLVED: To provide low color trisphenol methanes, a method of producing the same and use of the same.SOLUTION: When phenols and aromatic hydroxy aldehydes are reacted with each other by using acid catalyst under heat, the reaction is performed at a temperature of 100°C or less from the start of the reaction until a reaction rate reaches 90%, subsequently, the temperature is raised and the reaction is performed at a temperature more than 100°C and 130°C or less in order to produce trisphenol methanes. Thereby, the trisphenol methanes having a Gardner color scale of 9 or less (as a 0.5 mass% THF solution) and further a low color epoxy resin can be obtained. |
