Patent ID: 6418661
Filing Date: 2002-07-16
Classification: A01G,B32B,C01F,C01P,C09C,Y02A

Abstract:
A hydrotalcite compound, which has the following formula (1) or (2) and which holds in its interlayer at least a kind of anions selected from silicon-, phosphorus- and boron-containing oxygen acid ions, at least a part of said anions being at least one of silicon-, phosphorus- and boron-containing polymerized oxygen acid ions, and at least a kind of anions other than said oxygen acid anions,(Mgâ€”Al hydrotalcite compound) in which M2+ stands for at least a kind of divalent metal ion of Zn, Ca and Ni, A stands for at least a kind of anion selected from silicon-, phosphorus- and boron-containing oxygen acid ions, at least a part of which being at least a kind of anion selected from silicon-, phosphorus- and boron-containing polymerized oxygen acid ions, B stands for at least a kind of anion other than the A, and x, y1, y2, z1, z2 and b each satisfies the following condition or conditions: x: 0y1 and y2: y1+y2=1, 01<1, 0&lE;y2<1, z1 and z2: 01, 02, b: 0&lE;b<2; (Liâ€”Al hydrotalcite compound) â€ƒin which G2+ stands for at least a kind of divalent metal ion of Mg, Zn, Ca and Ni, A stands for at least a kind of anion selected from silicon-, phosphorus- and boron-containing oxygen acid ions, at least a part of which being at least a kind of anion selected from silicon-, phosphorus- and boron-containing polymerized oxygen acid ions, B stands for at least a kind of anion other than the A, and y1, y2, x, z1, z2 and b each satisfies the following condition or conditions: y1 and y2: 01&lE;1, 0&lE;y2<1, 0.5&lE;(y1+y2)&lE;1, x: x=y1+2y2, z1 and z2: 01, 02, b: 0&lE;b<5.