Synthetic resin composition having resistance to thermal deterioration and molded articles

一种有耐热劣化性的合成树脂组合物，其中包含(A)100重量份合成树脂，和(B)0.001～10重量份由下列特征(i)～(iv)定义的水滑石微粒：(i)水滑石微粒用化学结构式(1){(Mg)#-[y](Zn)#-[z]}#-[1-x](Al)#-[x](OH)#-[2](A#+[n-])#-[x/n]・mH#-[2]O代表，(ii)该水滑石微粒的平均次级粒径为2μm以下，(iii)该水滑石微粒的比表面积(BET法)为1～30m#+[2]/g，和(iv)该水滑石微粒含有以金属(铁和锰)计总量可多达0.02％(重量)的一种或多种铁化合物和一种或多种锰化合物。从该树脂组合物制成的成形品的耐热劣化性和耐冲击性优异，且水滑石微粒处于令人满意的分散状态。 A synthetic resin composition having heat deterioration resistance comprising: (A) 100 parts by weight of a synthetic resin; and (B) 0.001 to 10 parts by weight of hydrotalcite particles defined by the following (i) to (iv): (i) the hydrotalcite particles are represented by the following chemical structure formula (1): ä(Mg)y(Zn)zü1-x(Al)x(OH)2(A)x/n.mH2O (ii) the hydrotalcite particles have an average secondary particle diameter of 2 mu m or less; (iii) the hydrotalcite particles have a specific surface area (measured by a BET method) of 1 to 30 m /g; and (iv) the hydrotalcite particles contain an iron compound and a manganese compound in a total amount of 0.02 wt% or less in terms of metals (Fe + Mn). A molded article formed from the above resin composition of the present invention is excellent in heat deterioration resistance and impact resistance and satisfactory in the dispersibility of hydrotalcite particles.