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O/W Emulsion and Process Patented by Kao Corp.

November 30, -0001

U.S. Patent No. 7,511,002 B2; Kao Corporation, Tokyo, Japan, has patented a process for producing an oil-in-water emulsion.

The process has the following steps: mixing a polymer compound that has, in a side chain, a group represented by the formula -(OX)n-E2-R, wherein X represents a C1 to C6 linear or branched divalent saturated hydrocarbon group, n is a number of 5 to 300, Xs whose number is n may be the same as or different from one another, E2 represents an ether linkage (—O—) or an ester linkage (—OCO— or —COO—), and R represents a C4 to C30 linear or branched hydrocarbon group which may be substituted with a hydroxy group;a water-soluble polyol; a nonionic surfactant; a hydrophobic compound and water; then diluting the resulting mixture with water, so that the average emulsion particle diameter of the emulsion in the oil-in-water emulsion is 0.1 to 2 μm.
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