酸水酸化セリウム複合体並びにそれを配合した樹脂組成物及び化粧料

Oxide-cerium hydroxide composite body, and resin composition and cosmetic material blended with the same

Abstract

【課題】高い紫外線遮断能力を持ち、触媒活性が低減され、白色度が高い酸水酸化セリウム複合体、及びこの複合体を配合した樹脂組成物、化粧料を提供する。 【解決手段】Ce 4+ 1−X Ce 3+ X O 2−X (OH) X (但し、0<X<1)で表される酸水酸化セリウムを、酸化ケイ素、酸化ジルコニウム、酸化アルミニウム、酸化鉄、酸化チタンから選ばれる一種又は二種以上の酸化物で被覆してなる酸水酸化セリウム複合体である。また、上記のCe 4+ 1−X Ce 3+ X O 2−X (OH) X (但し、0<X<1)で表される酸水酸化セリウムが4価のセリウムイオンより大きなイオン半径を持つ金属イオン及び/又は4価のセリウムイオンより低原子価の金属イオンを固溶したところの酸水酸化セリウムを、酸化ケイ素、酸化ジルコニウム、酸化アルミニウム、酸化鉄、酸化チタンから選ばれる一種又は二種以上の酸化物で被覆してなる金属酸化物固溶酸水酸化セリウム複合体である。 【選択図】なし
PROBLEM TO BE SOLVED: To provide an oxide-cerium hydroxide composite body having high ultraviolet light shielding capacity, reduced catalytic activity and high whiteness, and to provide a resin composition and a cosmetic material blended with the composite body. SOLUTION: The oxide-cerium hydroxide composite body is obtained by coating an oxide-cerium hydroxide expressed by Ce 4+ 1-X Ce 3+ X O 2-X (OH) X (wherein, 0<X<1) with one or more kinds of oxides selected from silicon oxide, zirconium oxide, aluminum oxide, iron oxide and titanium oxide. Alternatively, an oxide-cerium hydroxide obtained by making a metallic ion having an ion radius larger than that of tetravalent cerium ion and /or a metallic ion having a valence lower than that of tetravalent cerium ion into a solid solution in the oxide-cerium hydroxide expressed by Ce 4+ 1-X Ce 3+ X O 2-X (OH) X (wherein, 0<X<1) is coated with one or more kinds of oxides selected from silicon oxide, zirconium oxide, aluminum oxide, iron oxide and titanium oxide, so that the oxide-cerium hydroxide composite body in which the one or more kinds of oxides enter into the solid solution is obtained. COPYRIGHT: (C)2005,JPO&NCIPI

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