Use of alkylpolyglycosides as emulsifying agents for the preparation of oil-in-water emulsions comprising inorganic fillers or pigments, and oil-in-water emulsions comprising such alkylpolyglycosides

Abstract

A composition and process of preparation of emulsifier agents based on an alkylpolyglycoside structure with a length of alkyl chain having from 6 to 12 carbon atoms to be used. The resulting emulsions exhibit an excellent dispersion of the fillers and/or pigments without it being necessary to add coemulsifier or dispersant. The emulsifier makes it possible, by itself alone, to prevent the reagglomeration of the fillers and/or pigments.

1 . An alkylpolyglycoside composition of formula (Ia) or (Ib)
   HO—RO—X( r   (Ia)     (X) a O—RO—(X) t   (Ib)   wherein:   a) X represents the residue of a C 5  or C 6  sugar;   b) R represents an alkylene or alkylidene group having from 6 to 12 carbon atoms; and   c) r, s, and t represent the mean degree of polymerization of each sugar residue, and are greater than 1 and less than or equal to 5.   
   
   
       2 . The alkylpolyglycoside composition of  claim 1 , wherein X represents the residue of glucose or xylose. 
   
   
       3 . A method of preparing an oil-in-water emulsion, containing inorganic fillers and/or pigments, comprising the step of adding an emulsifying agent which comprises said at least one alkylpolyglycoside of formula (Ia) or (Ib) of  claim 1 . 
   
   
       4 . An oil-in-water emulsion comprising:
 inorganic pigments and/or fillers; and   at least one compound wherein the compound is of the formula (Ia) or (Ib) of  claim 1 .   
   
   
       5 . The emulsion of  claim 4 , which is an antisun or a makeup emulsion.