Polyhydric alcohol-modified silicone and cosmetic material containing same

#This invention relates to a novel polyhydric alcohol-modified silicone, and to cosmetic materials containing this substance. When it is used as an oil base, cosmetic materials containing the polyhydric alcohol-modified silicone have excellent adhesion to the skin, are not sticky and have a clean feel, and when it is used as an emulsifier, they have excellent emulsification stability.

#In general, human secretions such as sweat, tears and sebum cause makeup to disintegrate. In particular, sebum secreted from the skin adds to the effect of the oil base of cosmetic materials, and the excessive wetting of powders in the cosmetic materials is a major factor in their disintegration. Hence, to reduce oils in cosmetic materials which remain on the skin, volatile oils such as octamethylcyclotetrasiloxane and decamethylcyclopentylsiloxane are sometimes blended with the oil bases used.

#External factors such as friction and water, etc., adversely affect how long makeup stays on the skin. Thus, to improve the ability of makeup to stay on the skin which is adversely affected by water-containing substances such as sweat and tears, silicone oil is blended with cosmetics to prevent the loss of water-soluble components in the skin or sebum, exert a protective effect on the skin and increase water repellence.

#The invention will now be described referring to specific examples, but the invention is not limited to these.

#In the following empirical formula, the Me3SiO group (or Me3Si group) is referred to as “M”, the Me2SiO group is referred to as “D” and the HMeSiO group is referred to as “H”. Units wherein the methyl group in M and D are modified by a substituent group are referred to as MR and DR.

#Siloxane Compound 1