PROBLEM TO BE SOLVED: To provide a surface-treated starch or surface-treated cellulose having various favorable characteristics for cosmetics such as moistness, spreadability, etc.SOLUTION: The provided method for manufacturing a surface-treated starch or surface-treated cellulose comprises a first step of primarily treating a starch and/or cellulose powder with an anhydrous dibasic acid derived from a dibasic acid possessing two carboxyl groups so as to convert the powder surface into a -COO alkali metal salt and, as a secondary treatment, a second step of reacting, with the primarily treated powder via a polyvalent metal, a water-soluble polyvalent metal salt possessing metal ions having valences of 2-4 and an alkali metal compound(s) of one, two, or more types selected from among fatty acids having 6 to 22 carbon atoms, amino acids, amino acids with which fatty acids having 6 to 22 carbon atoms are coupled, water-soluble acidic polysaccharides, water-soluble acidic synthetic polymers, and water-soluble acidic ultraviolet absorbers.COPYRIGHT: (C)2015,JPO&INPIT【課題】しっとり感、のび等の化粧料にとって好ましい種々の特性が良好な表面処理澱粉又は表面処理セルロースの提供。【解決手段】澱粉及び/又はセルロース粉体を、カルボキシル基を二つ有する二塩基酸から誘導される無水二塩基酸で一次処理して粉体表面を-COOアルカリ金属塩とする第一ステップ、及び、二次処理として水溶性の価数2~4の金属イオンを有する多価金属塩と、炭素数6から22の脂肪酸、アミノ酸、炭素数6から22の脂肪酸が結合したアミノ酸、水溶性の酸性多糖類、水溶性の酸性合成高分子、水溶性の酸性紫外線吸収剤から選ばれる一種又は二種以上のアルカリ金属化合物を、多価金属を介し一次処理した粉体と反応させる第二ステップからなる表面処理澱粉又は表面処理セルロース。【選択図】図1
