PROBLEM TO BE SOLVED: To provide water-containing polymer particles for cosmetics which reach the depth of the skin up to the muscle tissue, and demonstrate excellent shielding effects from near infrared radiation which brings about aging phenomena such as decreased elasticity of the skin and the formation of wrinkles.SOLUTION: The water-containing polymer particles comprise an outer shell made from a polymer material such as an acrylic resin, styrene-acrylic resin, or a styrene resin, with the interior gap space thereof containing 10 to 50 wt% of water, and the transmittance of infrared light in the 900 to 2500 nm range of wavelength being 94% or less.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】皮膚の奥深く筋肉組織にまで到達し、皮膚の弾力性の低下や皺の形成等の老化現象をもたらす近赤外線に優れた遮蔽効果を発揮する化粧料用水内包型ポリマー粒子の提供。【解決手段】外殻がアクリル系樹脂、スチレンアクリル系樹脂、またはスチレン系樹脂等のポリマー材料からなり、内部の空隙部分に10~50重量%の水を内包し、波長900~2500nm領域における近赤外線透過率が94%以下である化粧料用水内包型ポリマー粒子。【選択図】なし
