Abstract: A surfactant (a) having a critical micelle concentration (CMC) of 0.10 g/L or lower, represented by formula (1): R1—[—O-(A1O)n—H]m (1), wherein R1 is a C7-C20 hydrocarbon group having a valence number of m; m is an integer of 2 to 6; A1 in (A1O)n in each of [—O-(A1O)n—H]m is each independently a C2-C4 alkylene group; n in [—O-(A1O)n—H]m is each independently an integer of 1 to 100; and the sum of n in [—O-(A1O)n—H]m is 13 or greater.

Abstract: A surfactant (a) having a critical micelle concentration (CMC) of 0.10 g/L or lower, represented by formula (1): R1—[—O-(A1O)n—H]m (1), wherein R1 is a C7-C20 hydrocarbon group having a valence number of m; m is an integer of 2 to 6; A1 in (A1O)n in each of [—O-(A1O)n—H]m is each independently a C2-C4 alkylene group; n in [—O-(A1O)n—H]m is each independently an integer of 1 to 100; and the sum of n in [—O-(A1O)n—H]m is 13 or greater.

Abstract: A water permeability-imparting agent containing an alkylene oxide adduct (A) of a polyvalent active hydrogen compound represented by Formula (1): R—[O(A1O)m—(CH2CH2O)n—H]1??(1) wherein R represents a residue, after removal of all active hydrogen, of the polyvalent active hydrogen compound; A1O represents a C2 to C4 alkyleneoxy group; m represents an average addition mole number of A1O and is a number of 4 to 50; n represents an average addition mole number of CH2CH2O; and 1 represents a valence and is an integer of 3 to 6, and an average addition mole number ratio between A1O and CH2CH2O in Formula (1), n/m, is 0 to 0.5.

Abstract: A water permeability-imparting agent containing an alkylene oxide adduct (A) of a polyvalent active hydrogen compound represented by Formula (1): R—[O(A1O)m—(CH2CH2O)n—H]1 ??(1) wherein R represents a residue, after removal of all active hydrogen, of the polyvalent active hydrogen compound; A1O represents a C2 to C4 alkyleneoxy group; m represents an average addition mole number of A1O and is a number of 4 to 50; n represents an average addition mole number of CH2CH2O; and 1 represents a valence and is an integer of 3 to 6, and an average addition mole number ratio between A1O and CH2CH2O in Formula (1), n/m, is 0 to 0.5.

Abstract: The present invention has its object to provide a lubricant for fibers which shows, in particular, good anti-tackiness property against fiber-to-fiber tackiness in the manufacture of elastic fibers, and good time-dependent stability for a long period of time as a lubricant for treating fibers. The present invention provides a lubricant for treating fibers to be used for fibers made of a polymer material (a) wherein the angle of contact with water at 25° C. of the surface of a sheet made of the material (a) is not greater than 60° and the angle of contact with water at 25° C. of the surface of the sheet made of the material (a) applied with the lubricant for treating fibers is 70° to 180°.

Abstract: The present invention provides a lubricant for treating elastic fiber which comprises at least 80 mass % of at least one base oil (A) having a viscosity at 25° C. of 1 to 1,000 mm2/s as selected from the group consisting of silicone oil (A1) and hydrocarbon series lubricating oil (A2), 0.05 to 2 mass % of a C12 to 24 higher fatty acid alkaline earth metal salt (B) having a volume average particle diameter of 0.001 to 1 ?m, and 0.01 to 8 mass % of at least one surfactant (C) having a solubility parameter (SP value) of 8.0 to 10.5 as selected from the group consisting of anionic surfactant (C1) and nonionic surfactant (C2).

Abstract: The present invention provides a spin finish for elastic fibers which comprises an amphoteric surfactant and/or a cationic surfactant as well as a base oil and has a surface tension thereof at 25 of 14 to 35 mN/m and a volume resistivity thereof at 20 of 1×107 to 1×1013 &OHgr; cm; a spin finish for elastic fibers which comprises an ionic surfactant and a base oil and has a surface tension (S) thereof at 25° C. of 14 to 22.5 mN/m and a volume resistivity (&rgr;) thereof at 20° C. of 1×107 to 1×1013 &OHgr; cm, &rgr; and S satisfying the following relation [1]; &rgr;≦1×10(−2.4S+61)  [1] a spin finish for elastic fibers which comprises a quaternary ammonium salt of the specific composition, a base oil and a higher fatty acid (C5-30) metal salt powder; a method of treating an elastic fiber which comprises providing an elastic fiber with any of the above spin finish for elastic fibers in an amount of 0.

Abstract: The present invention provides a spin finish for elastic fibers which comprises an amphoteric surfactant and/or a cationic surfactant as well as a base oil and has a surface tension thereof at 25° C. of 14 to 35 mN/m and a volume resistivity thereof at 20° C.

Abstract: A hair treatment composition which comprises an aqueous solution or an aqueous dispersion of at least one quatenary ammonium salt (A) represented by the general formula (I), (2) or (3): wherein Ra represents an organic group containing 6 to 32 carbon atoms, Rb and Rc are the same or different and each represents an organic group containing 1 to 32 carbon atoms, Rd represents an organic group containing 1 to 4 carbon atoms, and Q− represents an amoni acid anion;  wherein X1 represents an ester group; R5 represents an alkyl, alkenyl or hydroxyalkyl group and R6 represents an alkylene, alkenylene or hydroxyalkylene group, the sum of carbon atoms contained in R5 and R6 being 6 to 32, R7 and R8 are the same or different and each represents a group of the formula R5—X1—R6—, an alkyl group containing 1 to 4 carbon atoms or a hydroxyalkyl group containing 2 to 4 carbon atoms, R9 represents an alkyl group containing 1 to 4 carbon atoms or a hydro