| 摘要 |
There are provided organic acid anion containing aluminum salt hydroxide particles represented by the following general formula (I): M a [Al1-x M ' x] b A z B y (OH) n .cndot. mH2O (I) (wherein M is at least one cation selected from the group consisting of Na+, K+, NH4+ and H3O+, M' is at least one metal cation selected from the group consisting of Cu2+, Zn2+, Ni2+, Sn4+, Zr4+, Fe2+, Fe3+ and Ti4+, A is at least one organic acid anion, B is at least one inorganic acid anion, and a, b, m, n, x, y and z satisfy 0.7 <= a <= 1.35, 2.7 <= b <= 3.3, 0 <= m <= 5, 4 <= n <= 7, 0 <= x <= 0.6, 1.7 <= y <= 2.4, and 0.001 <= z <= 0.5, respectively.) The particles are in the shape of grains, pairs, rectangular parallelepiped, disks (go stones), hexagonal plates, rice grains or cylinders and have a uniform particle diameter.
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