| 摘要 |
<p>A nonionic surfactant which is directly produced by causing an aliphatic alcohol (a1) to add an alkylene oxide (b1), is represented by the general formula R1O-[(C2H4O)m/(AO)n]-(C2H4O)p-H, and has a value of Mw/Mn in a specific range, and in which the distribution constant c determined using the following equation derived from the Weibull distribution law is 1.0 or smaller. c=(v+n0/n00-1)/[Ln(n00/n0)+n0/n00-1] (4) (In the equation (4), v is the average of (m+n+p) in the above general formula; n00 is the number of moles of the aliphatic alcohol (a1) used in the reaction; and n0 is the number of moles of the aliphatic alcohol (a1) remaining unreacted.) Due to the specific composition and the specific molecular weight, the surfactant is comparable in surface activity to nonionic surfactants of the alkylphenol type and has no fear of generating an endocrine disruptor. A surfactant obtained by making the nonionic surfactant anionic is improved in foaming property and reduced in odor and skin irritation and hence gives an excellent detergent composition.</p> |
