| 摘要 |
PURPOSE:To obtain the title composition improved in stability against heat and oxygen, by mixing a specified block copolymer with a mixture of at least two specified cyclic organic compounds. CONSTITUTION:The title composition prepared by adding 0.5-5pts.wt. at least two compounds selected from among a phenol compound (A) of formula I (wherein R1-R5 are each H or a 1-6 C alkyl at least two of which are alkyl), a hydroquinone (B) of formula II (wherein R6-R9 are each H or a 1-6 C alkyl at least two of which are alkyl), a triazine derivative (C) of formula III (wherein X1-X3 are each a group containing N, O or S which is directly bonded to the triazine ring and to which H, a 1-8 C alkyl, a 4-8 C alkyl or an alkyl-substituted phenol group is bonded) and a phenol compound (D) of formula IV (wherein R10 is aryl or a 1-8 C alkyl, R11-R13 are each H, aryl or a 1-8 C alkyl, R14 is alkylene, R15 is a 1- 6 C hydrocarbon, l is 0-8 and m is 1-6), provided that a mixture of only C and D is excluded.
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