| 摘要 |
PROBLEM TO BE SOLVED: To prepare liquid cosmetics which can develop thixotropy without any clay mineral. SOLUTION: One of the liquid cosmetics comprises a cellulose derivative prepared by bonding substituents each represented by -OC(O)-A-COOH (wherein -OC(O)-A-COO- is a residue formed by ring-opening an acid anhydride) to a cellulose skeleton. The other of the liquid cosmetics comprises a cellulose derivative prepared by reacting a partial ester of cellulose with an acid anhydride. The cellulose derivatives desirably have each a number-average molecular weight of 4,000 to 15,000 and a minimum gelation concentration of at most 80 wt.% as measured by using an ethyl acetate/butyl acetate (2/1 (W/W)) mixed solvent. COPYRIGHT: (C)2006,JPO&NCIPI
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