アルキルフェノール・ホルムアルデヒド縮合物系高分子非イオン界面活性剤の研究-1-

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It has been known that aqueous solutions of polymeric surfactants behave peculiarly as compared with ordinary monomeric surfactants. However, the phenomena is still imcompletely explored. Authors contemplated study for clarifying the relationship between molecular weights of polymeric surfactants derived from nonylphenol-formaldehyde condensares and their properties in aqueous solutions. In this paper, the reaction of formaldehyde with nonylphenol in ethanol solution was investigated. As a result, the order of the reaction was considered to be secondary to the cocnentration of formaldehyde, and then the activation energy of 22.4kcal was calculated. Nobolac type resins of various molecular weights were easily prepared by homogenious reactions using n-butanol as solvent. Resins were then polyoxyethylated. Polymeric surfactants thus obtained differed from monomeric ones in many respects and excellent emulsification of xylol was attained by using polymeric surfactants, especially for nonylphenol-formaldehyde condensate having mean molecular weight around 1, 000.
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