- EXTERNAL PREPARATION FOR THE SKIN AND COPOLYMER TO BE USED THEREIN
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An object of the present invention is to provide an external preparation for the skin, which shows an excellent effect of sufficiently protecting the living body against irritants that exist in the external environments, and a polymer material to be preferably used therein. Provided is an external preparation for the skin obtained mixing a copolymer which comprises constituent units derived from monomers of the general formula (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 optional components. In the formula, 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.
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Page/Page column 9
(2008/06/13)
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