Oil-in-water emulsion cosmetic composition

[0130]230.67 g of trimethylsilyl undecylenate and 0.042 g of a platinum-1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex were put into a flask equipped with a stirrer, a reflux condenser, a dropping funnel, and a thermometer, and 129.33 g of Si-Hsiloxane expressed by the following general formula was dropped thereinto so as to maintain the range of 70 to 80° C.

[0131]After the completion of dropping, the mixture was aged for 2 hours at 110° C., and then the loss of Si—H bonds was confirmed by the hydrogen generation method. A low boiling point content was distilled off under reduced pressure. Thereafter, 90 g of deionized water was added, and the mixture was aged under reflux for 4 hours for deprotection. Thereafter, the low boiling point content was again removed under reduced pressure to obtain a compound 1. As a result of analysis, it was confirmed that the chemical structure of the compound 1 was expressed by the following chemical formula:

[0132]283.39 g of trimethylsilyl undecylenate and 0.054 g of a platinum-1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex were put into a flask equipped with a stirrer, a reflux condenser, a dropping funnel, and a thermometer, and 100.61 g of Si-Hsiloxane expressed by the following general formula was dropped thereinto so as to maintain the range of 70 to 80° C.

[0133]After the completion of dropping, the mixture was aged for 2 hours at 110° C., and then the loss of Si—H bonds was confirmed by the hydrogen generation method. A low boiling point content was distilled off under reduced pressure. Thereafter, 96 g of deionized water was added, and the mixture was aged under reflux for 4 hours for deprotection. Thereafter, the low boiling point content was again removed under reduced pressure to obtain a compound 2. As a result of analysis, it was confirmed that the chemical structure of the compound 2 was expressed by the following chemical formula:

[0134]159.00 g of trimethylsilyl undecylenate and 0.035 g of a platinum-1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex were put into a flask equipped with a stirrer, a reflux condenser, a dropping funnel, and a thermometer, and 141.00 g of Si-Hsiloxane expressed by the following general formula was dropped thereinto so as to maintain the range of 70 to 80° C.

[0135]After the completion of dropping, the mixture was aged for 2 hours at 110° C., and then the loss of Si—H bonds was confirmed by the hydrogen generation method. A low boiling point content was distilled off under reduced pressure. Thereafter, 150 g of deionized water was added, aged at reflux for 4 hours, and deprotection was performed. Thereafter, the low boiling point content was again removed under reduced pressure to obtain a compound 3. As a result of analysis, it was confirmed that the chemical structure of the compound 3 was expressed by the following chemical formula: