反応性界面活性剤 (第2報) : N-トリメチルアミノアルカンイミドの合成と性質

概要

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Some higher homologues of N-trimethylaminoalkanimide (CH3) 3N-NCOR (I) (R : C11C17) were prepared from fatty acid hydrazides and their surface active properties were examined. Also, the availability of (I) for reactive surfactants was studied, since the pyrolysis of aminimides have been known to give the corresponding isocyanates. The aqueous solution of (I) was neutral and showed very low conductivities. Behavior of (I) in aqueous solution was generally similar to nonionic surfactants, as well as N-fattyalkyl-dimethylaminoacetimides R (CH3) 2N-NCOCH3 (II). The surface tension of (I) above cmc was about 30 dyne/cm, a little lower than that of corresponding (II), and cmc of (I) was slightly higher than that of (II). Cotton clothes treated by stearoyl homologue of (I) showed excellent durable water-repellency. It is a characteristic of (I) as water-repellent agent that no color change of the treated clothes was virtually observed during the curing at higher temperature (150170°C). Interfacial tension, penetrating power and foaming power of (I) were measured and compared with those of polyoxyethylene nonionics.
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