| abstract |
The present invention relates to a non-ionic surfactant composition consisting of a non-ionic surfactant containing an alkyl group and/or an alkenyl group with a carbon number of between 10 and 22 in a molecule as a hydrophobic group, containing a polyoxyalkylene chain as a hydrophilic group, not containing an aromatic ring in the molecule, not containing an alkyl group with a carbon number of between 9 and 14 derived from alcohol produced by an oxo method through a higher olefin derived from a compound of propylene and butene in the molecule, and not containing an alkyl group with a carbon number of 13 derived from alcohol produced by the oxo method through the higher olefin derived from a propylene tetramer in the molecule. According to the non-ionic surfactant composition, the hydrodynamic radius of the non-ionic surfactant at a temperature of 40°C which is measured by a dynamic light scattering method is between 5.0 nm and 8.0 nm in an aqueous solution which is produced in such a manner that the concentration of the non-ionic surfactant in the composition is 0.1kg/L. |