PROBLEM TO BE SOLVED: To provide a water-proof preparation for skin useful as a cosmetic for protecting skin and having excellent water repellency and water resistance.SOLUTION: The water-proof preparation for skin is obtained as follows. A PC-LA copolymer prepared by polymerizing a PC monomer represented by a specific formula (1) with an LA monomer represented by specified formula (2) in an amount of 0.3-0.7 wt.% is mixed with 4-6 wt.% of a specified kind of silicone, 1-3 wt.% of a specified kind of cellulose derivative, 0.05-0.5 wt.% of a cross-linked acrylic polymer having 1,500-150,000 mPa s viscosity at 25°C and water.COPYRIGHT: (C)2008,JPO&INPIT【課題】皮膚保護用化粧料に有用な撥水・耐水性に優れた皮膚用ウォータープルーフ製剤を提供することにある。【解決手段】特定の式(1)で示されるPC単量体と特定の式(2)で示されるLA単量体とを重合したPC-LA共重合体を0.3~0.7重量%と、特定の種類のシリコーン4~6重量%、特定の種類のセルロース誘導体1~3重量%と、25℃における粘度が1500~150000mPa・sである架橋アクリルポリマー0.05~0.5重量%と、水とを混合した皮膚用ウォータープルーフ製剤。【化1】【化2】【選択図】なし
