Oil-based composition

Abstract

A method for producing a gel-like oily composition including the following components (A), (B), and (C): (A) 4 to 60% by weight of a sphingosine represented by the formula (1) (wherein Rrepresents a hydrocarbon group having 4 to 30 carbon atoms; Y represents a methylene group, a methine group, or an oxygen atom; X, X, and Xeach represent a hydrogen atom, a hydroxyl group, or an acetoxy group; Xrepresents a hydrogen atom, an acetyl group, or a glyceryl group or forms an oxo group together with the adjacent oxygen atom; Rand Reach represent a hydrogen atom, a hydroxyl group, a hydroxymethyl group, or an acetoxymethyl group; 'R's each represent a hydrogen atom or an amidino group or represent a hydrocarbon group having a total of 1 to 8 carbon atoms; 'a' represents a number of 2 or 3; and a bond represented by a broken line and a solid line indicates a saturated bond or an unsaturated bond); (B) 0.5 to 10% by weight of an anionic polymer having a carboxyl group; and (C) 30 to 95.5% by weight of an oil in a liquid state at 25° C. selected from a hydrocarbon oil, an ester oil, and an ether oil, the method including mixing the components (A), (B), and (C) and heating the resultant mixture to a temperature equal to or more than a melting point of the component (A) to neutralize the component (B) with the component (A) to form a salt.