| 摘要 |
It is an object of the present invention to provide hydrotalcite which can inhibit a white discoloration by water of a polyolefin film for agricultural uses, a blooming to the surface of a vinyl chloride resin film, a reduction in electric resistance in the case of using the hydrotalcite as a stabilizer of a vinyl chloride resin for covering wires, the occurrence of die drool in the case of using the hydrotalcite as a neutralizer of an acid catalyst residue in a polyolefin resin or a copolymer thereof, and coloring (yellowing) in extrusion in preparing pellets and can be suitably used as a resin additive, a method of producing the same and a synthetic resin composition containing the same. Hydrotalcite expressed by the following formula (1);
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ[(Mg) x (Zn) y ] 1-z (Al) z (OH) 2 (A n- ) z/n €¢mH 2 O€ƒ€ƒ€ƒ€ƒ€ƒ(1)
in the formula A n- represents an anion having a valence of n, andx, y, z and m are values which satisfy the following expressions, 0.5 ‰ x ‰ 1, 0 ‰ y ‰ 0.5, x+y = 1, 0.1 ‰ z ‰ 0.5, 0 ‰ m < 1, and
the hydrotalcite has a sodium content of 100 ppm or less and is used as a resin additive. |
