Odorless modified silicone compound, cosmetic preparation containing the same, and method of purifying modified silicone compound having branch polymer comprising hydrophilic group

A modified compound of formula (1):

• R1aR2bSiO(4-a-b)/2 (1)
• wherein, R1 in the formula is an alkyl group having 1-30 carbon atoms, aryl group, aralkyl group, fluorine-substituted alkyl group or an organic group represented by the general formula (2):
• —CmH2m—O—(C2H4O)c(C3H6O)dR3 (2)
• wherein R2 is a hydrocarbon group having 5-30 carbon atoms, or an organic group represented by Rd−(CO)— where R4 is a hydrocarbon group with 1-30 carbon atoms,
• c, d, and m are integers in the range 0≦c≦50, 0≦d≦50, and 0≦m≦15, respectively, and R2 is a group chosen from the residues below
• wherein, Q is a divalent hydrocarbon group with 3-20 carbon atoms which may contain at least one of an ether bond or ester bond, and s, t in the formula are integers in the range 1-20, said compound being synthesized by performing an addition reaction between an organohydrogenpolysiloxane, and at least one compound chosen from an alkenylated polyoxyalkylene compound, an alkenylated glycerin compound and an alkenylated sugar in the presence of a platinum catalyst or rhodium catalyst to obtain a reaction liquor, and the compound being purified by decomposing aldehyde condensation products remaining in the resulting silicone compound by:
• hydrogenating the remaining unsaturated bonds after hydrogenating the reaction liquor from the addition reaction to hydrogenate unsaturated bonds, and treating with an aqueous solution of pH 7 or lower containing an acidic substance, or
• decomposing a propenyl etherated polyether in the reaction liquor from the addition reaction by treating with an aqueous solution of pH 7 or lower containing an acidic substance, and then hydrogenating the generated aldehydes and alkenylated ether compounds by hydrogenation,
• the degree of unsaturation (meq/g) in the modified silicone compound being 0.002 or less, and the generation amount of aldehydes when heat aging is performed in 0.23N hydrochloric acid at 50° C. for 0.5 hours in 70 ppm or less of the modified silicone compound.

A modified compound of formula (1):

• R1aR2bSiO(4-a-b)/2 (1)
• wherein, R1 in the formula is an alkyl group having 1-30 carbon atoms, aryl group, aralkyl group, fluorine-substituted alkyl group or an organic group represented by the general formula (2):
• —CmH2m—O—(C2H4O)c(C3H6O)dR3 (2)
• wherein R3 is a hydrocarbon group having 5-30 carbon atoms, or an organic group represented by R4−(CO)— where R4 is a hydrocarbon group with 1-30 carbon atoms, c, d, and m are integers in the range 0≦c≦50, 0≦d≦50, and 0≦m≦15 respectively, and R2 is a monosaccharide or oligosaccharide and said compound being synthesized by performing an addition reaction between an organohydrogenpolysiloxane, and at least one compound chosen from an alkenylated polyoxyalkylene compound, an alkenylated glycerin compound and an alkenylated sugar in the presence of a platinum catalyst or rhodium catalyst to obtain a reaction liquor, and said compound being purified by decomposing aldehyde condensation products remaining in the resulting silicone compound by:
• hydrogenating the remaining unsaturated bonds after hydrogenating the reaction liquor from the addition reaction to hydrogenate unsaturated bonds, and treating with an aqueous solution of pH 7 or lower containing an acidic substance, or
• decomposing a propenyl etherated polyether in the reaction liquor from the addition reaction by treating with an aqueous solution of pH 7 or lower containing an acidic substance, and then hydrogenating the generated aldehydes and alkenylated ether compounds by hydrogenation,
• the degree of unsaturation (meq/g) in the modified silicone compound being 0.002 or less, and the generation amount of aldehydes when heat ageing is performed in 0.23N hydrochloric acid at 50° C. for 0.5 hours in 70 ppm or less of the modified silicone compound.