PROBLEM TO BE SOLVED: To provide a novel modified polysiloxane excellent in operability because it is lower in viscosity compared with current polyoxyalkylene-modified polysiloxane and polyglycerol-modified polysiloxane, environmentally highly adaptable because it is hardly oxidized in air and hardly producing with time aldehydes such as formaldehyde and allergic antigenic compounds such as formic acid ester during storage, and stable because it is lower in hydrolyzability compared with current polyglycerol-modified polysiloxane, a method of manufacturing the same, and cosmetics containing the polysiloxane.SOLUTION: In this polysiloxane, an end hydroxy group of polyglycerol-modified polysiloxane is partially blocked by a hydrocarbon group. This partially hydrocarbon group-blocked polyglycerol-modified polysiloxane is lower in viscosity and excellent in operability compared with current polyglycerol-modified polysiloxane, therefore, it is easy to be compounded into cosmetics, etc.COPYRIGHT: (C)2010,JPO&INPIT【課題】既存のポリオキシアルキレン変性ポリシロキサン及びポリグリセロール変性ポリシロキサンと比較して、低粘度で作業性に優れ、また、空気下で酸化され難く、保存中にホルムアルデヒド等のアルデヒド類、ギ酸エステル類等のアレルギー抗原性化合物を経時的に生成し難いので環境適合性が高く、更に、従来のポリグリセロール変性ポリシロキサンと比較して、加水分解性が低く安定である新規な変性ポリシロキサン及びその製造方法、更にはそれを含有する化粧料を提供すること【解決手段】ポリグリセロール変性ポリシロキサンの末端水酸基を部分的に炭化水素基でブロックする【選択図】なし
