Oil-in-water emulsion cosmetic composition and method for producing the same

Abstract

To provide an oil-in-water emulsion cosmetic composition obtained by using a polyglycerin fatty acid ester as a surfactant, which has high stability against temperature and is excellent in tactile sensation, and a method for producing the same, the present invention provides an oil-in-water emulsion cosmetic composition, wherein the composition comprises 1) a polyglycerin fatty acid ester, as a surfactant, having a hydroxyl value of 450 to 700, a fatty acid residue having 16 to 18 carbon atoms accounting for 50 to 100% by mass of all constituent fatty acid residues, the polymerization degree of glycerin having specific distribution, 2) an oily component, and 3) water.

1 . An oil-in-water emulsion cosmetic composition, 
 wherein the oil-in-water emulsion cosmetic composition comprises:    a component A: a polyglycerin fatty acid ester having a hydroxyl value of 450 to 700, a fatty acid residue having 16 to 18 carbon atoms accounting for 50 to 100% by mass of all constituent fatty acid residues, the total content of a dimer and a trimer of a cyclic polyglycerin being from 0 to 3% by mass, the total content of an undecamer of polyglycerin being from 10 to 30% by mass, and the each content of a tetramer to a decamer of polyglycerin being from 4 to 20% by mass, based on 100% by mass of polyglycerin constituting the polyglycerin fatty acid ester,    a component B: an oily component, and    a component C: water, and    the amount of the component A is from 0.001 to 25% by mass, the amount of the component B is from 0.001 to 60% by mass, and the amount of the component C is from 10 to 99% by mass.    
   
   
       2 . The oil-in-water emulsion cosmetic composition according to  claim 1 , wherein the amount of the component A is from 0.01 to 15% by mass, the amount of the component B is from 0.01 to 50% by mass, and the amount of the component C is from 30 to 95% by mass.  
   
   
       3 . The oil-in-water emulsion cosmetic composition according to  claim 1 , wherein a hydroxyl value of the polyglycerin fatty acid ester as the component A is from 550 to 700, at least one of a polyhydric alcohol fatty acid ester having a hydroxyl value of 100 to 500 (excluding the component A) and a polyhydric alcohol alkyl ether having a hydroxyl value of 100 to 500 is added as a component D, and the amount of the component D is from 1 to 100% by mass based on the amount of the component A.  
   
   
       4 . The oil-in-water emulsion cosmetic composition according to  claim 3 , wherein the amount of the component A is from 0.01 to 15% by mass, the amount of the component B is from 0.01 to 50% by mass, the amount of the component C is from 30 to 95% by mass, and the amount of the component D is from 1 to 100% by mass based on the amount of the component A.  
   
   
       5 . The oil-in-water emulsion cosmetic composition according to  claim 1 , wherein the fatty acid residue having 16 to 18 carbon atoms as the component A is at least one selected from isostearic acid residue, ojeic acid residue, palmitic acid residue and stearic acid residue.  
   
   
       6 . The oil-in-water emulsion cosmetic composition according to  claim 1 , further comprising a thickener.  
   
   
       7 . The oil-in-water emulsion cosmetic composition according to  claim 1 , wherein the oil-in-water emulsion cosmetic composition is at least one selected from cream in general, milky lotion, sun tan cream, sun-block cream, shaving cream, cleansing cream, facial cleansing cream, lotion in general, sun tan lotion, sun-block lotion, shaving lotion, serum, lipstick, gel, cleansing gel, moisture gel, pack, emulsion foundation, emulsified eye shadow, nail treatment, shampoo, conditioner and hair treatment.  
   
   
       8 . A method for producing the oil-in-water emulsion cosmetic composition according to  claim 1 , wherein the method comprises the step of adding an oil phase containing the component A and the component B to an aqueous phase containing a component C, and emulsifying them.  
   
   
       9 . The method for producing the oil-in-water emulsion cosmetic composition according to  claim 8 , wherein the emulsification temperature is from 10 to 90° C.  
   
   
       10 . A method for producing the oil-in-water emulsion cosmetic composition according to  claim 3 , wherein the method comprises the step of adding an oil phase containing the component A, the component B and the component D to an aqueous phase containing the component C and emulsifying them.  
   
   
       11 . The method for producing the oil-in-water emulsion cosmetic composition according to  claim 10 , wherein the emulsification temperature is from 10 to 90° C.