| 摘要 |
<p>The invention aims at providing an external preparation for the skin excellent in the effect of protecting the living body from external stimuli, and a polymer material suitable for the preparation. The aim is attained by an external preparation for the skin obtained mixing a copolymer which comprises constituent units derived from monomers of the general formulae (I), (II) and, if necessary, (IV) with the content of units (I) ranging from 5 to 25 wt % based on the total amount of all the constituent units, preferably with the contents of units (I), (II) and (IV) being 5 to 9.8 wt %, 30.2 to 45 wt %, and 50 to 60 wt % respectively, with other arbitrary components. In the formulae, R1 is H or C1-3 alkyl; R2 is C5-12 alkyl having 8 to 21 fluorine atoms; R3 is H or C1-3 alkyl; R4 is optionally hydroxylated C2-4 alkylene; R5 is H, a C1-20 aromatic group, a C1-20 aliphatic hydrocarbon group, or C1-20 acyl; and n is 4 to 50.</p> |
