| 摘要 |
Provided are: a resin additive composition which contains a specific metal phosphate salt and exhibits excellent dispersibility in a resin even if formed into pellets, and which is able to achieve a desired physical property improving effect if blended into a resin; and a synthetic resin composition which uses this resin additive composition. A resin additive composition which contains, per 100 parts by mass of (A) sodium-2, 2'-methylene-bis(4, 6-di-tert-butylphenyl)phosphate, 25-400 parts by mass of (B) a lithium phosphate salt compound represented by general formula (1) and 10-300 parts by mass of (C) a fatty acid metal salt represented by general formula (2). The blending amount of the component (C) is from 10 parts by mass to 50 parts by mass per 100 parts by mass of the total of the component (A) and the component (B). |
