Patent ID: 8734766

Claim:
A method of producing a lip cosmetic having smoothness and adhesion upon application, moisturizing and protecting properties, and long-term stability, the method comprising the steps of: (i) mixing an oligomer (ingredient (a)) produced from behenic acid, eicosane diacid, and a glycerin condensate, a polyol (ingredient (b)), and water (ingredient (c)) to prepare a solution containing ingredients (a), (b), and (c); (ii) mixing one or more ester oils selected from the group consisting of castor oil, pentaerythrityl tetraisostearate, polyglycerol-2 triisostearate and diisostearyl malate (ingredient (d)) with an oligomer (ingredient (e)) produced from behenic acid, eicosane diacid, and glycerin to prepare a solution containing ingredients (d) and (e); and (iii) gradually adding the solution containing the ingredients (a), (b), and (c) to the solution containing the ingredients (d) and (e), with stirring, wherein the mass ratio ((a+b+c):(d+e)) of the total mass (a+b+c) of the ingredients (a), (b), and (c) and the total mass (d+e) of the ingredients (d) and (e) is 8:2 to 3:7; the content of ingredient (a) is 1 to 16% by mass based on the total mass of the lip cosmetic; the content of ingredient (b) is 18 to 40% by mass based on the total mass of the lip cosmetic; the content of ingredient (c) is 2 to 10% by mass based on the total mass of the lip cosmetic; the content of ingredient (d) is 34 to 70% by mass based on the total mass of the lip cosmetic; and the content of ingredient (e) is 0.5 to 7% by mass based on the total mass of the lip cosmetic.