| abstract |
Benzophenone derivatives expressed by the following general expression (1); n n n n A (̵ C-B ) n (1) n n n n wherein A in the above general expression (1) is a residual group obtained by removing one hydroxyl group from sugar or sugar alcohol, and n B is a benzophenone group shown by the following general expression (2)n n wherein R₁ through R₁₀ each is expressed by hydrogen, hydroxyl group, an alkoxy group, or the aforesaid binder C , and at least one of them is the binder C . In the case of an alkoxy group, preferably the number of carbon atoms is 1 to 4. n C is equivalent to -O-R- ( O is oxygen, R is a fatty chain, and the number of carbon atoms therein is preferably 1 to 4), or 1 mole of glycerin with one hydroxyl group therein bound to A and another hydroxyl group to B . n The benzophenone derivatives according to the present invention have excellent capability to absorb ultraviolet rays as well as high compatibility with polar solvent. Also the external preparation for skin in which the benzophenone derivatives are mixed can be mixed in a polar base with wide availability for industrial purpose. |