PROBLEM TO BE SOLVED: To provide purified and hydrogenated polyisobutene that has virtually scentless hydrogenated polyisobutene, that excels in temporal stability of the smell and has not so-called temporal smell attaching, and further that improves the safety to skin.SOLUTION: In hydrogenated polyisobutene, the maximum value of the absorbance in the range of the wavelength of 260 nm-350 nm is made at most 0.06 by using a column chromatography method, thereby obtaining the virtually scentless purified and hydrogenated polyisobutene that excels in temporal stability and has not so-called temporal smell attaching, and further that improves the safety to the skin to make it into a cosmetic, quasi drug, and pharmaceutical containing the same.COPYRIGHT: (C)2012,JPO&INPIT【課題】水添ポリイソブテンの臭いがほぼ無臭で、かつ臭いの経時安定性に優れたいわゆる経時着臭のない、さらには皮膚に対する安全性を向上させた精製水添ポリイソブテンを提供する。【課題を解決するための手段】水添ポリイソブテンを、カラムクロマトグラフ法を用いて、波長260nm~350nmの範囲における吸光度の最大値を0.06以下に低下させることにより、ほぼ無臭で、かつ経時安定性に優れたいわゆる経時着臭のない、さらには皮膚に対する安全性を向上させた精製水添ポリイソブテンを得、これを含有する化粧品、医薬部外品、医薬品。【選択図】 図1
