Patent ID: 8809439

Claim:
A resin composition comprising: (i) 100 parts by weight of synthetic resin, (ii) 0.1 to 10 parts by weight of calcium hydroxide produced by reacting an aqueous solution of a water-soluble calcium salt with an aqueous solution of an alkali metal hydroxide in the presence of an organosilicon-based compound, wherein the water-soluble calcium salt is calcium chloride or calcium nitrate, and wherein the alkali metal hydroxide is sodium hydroxide or potassium hydroxide, wherein the calcium hydroxide: (a) is represented by the following formula (1): Ca(OH) 2-nx (A n− ) x (1) wherein n is 4, x represents a number of 0.001 to 0.2, and A n− is SiO 4 4− , (b) has an average secondary particle diameter, measured by a laser diffraction scattering method, of 0.1 to 7 μm, and (c) has a BET method specific surface area of 5 to 40 m 2 /g, and (iii) 0.1 to 10 parts by weight of hydrotalcite represented by the following formula (2): {(Mg) y (Zn) z } 1-x (Al) x (OH) 2 (A n− ) x/n .mH 2 O (2) wherein A n− represents ClO 4 − , SO 4 2− , CO 3 2− or a mixture thereof, n is 1 or 2, and x, y, z and m satisfy y+z=1, 0.1<x<0.5, 0.5<y<1, 0≦z<0.5 and 0<m<1).