| abstract |
(57) [Summary] [Object] To provide a 1,2-polybutadiene composition having excellent radiation resistance. [Structure] 1,2-polybutadiene has an average composition of pentaerythritol diphosphite and one phosphorus atom: 1 P (OAr) 3-n (OR) n (where Ar is a phenol residue, R Is an aliphatic alcohol residue, an alicyclic alcohol residue or an aromatic group-containing alcohol residue, and n is 0 or an integer of 1 to 3). Add and mix phyto compound. |