| 摘要 |
PROBLEM TO BE SOLVED: To obtain a block copolymer composition having an excellent stability of physical properties, preventing the development of gell-like materials, and having excellent resistance to thermal discoloration when holding for a long time at high temperature, by adding a specified phenolic thermal stabilizer to a block copolymer obtained by using a specified coupling agent. SOLUTION: The thermal stabilized block copolymer composition comprises (i) a block copolymer of 100 pts.wt. obtained by performing a coupling reaction of a block copolymer comprising stylene based polymer block and diene based polymer block using an alkokysilane compound and/or a specified diepoxy compound and (ii) a stabilizer being a specified phenolic based compound of the formula (1) less than 0.005-0.5 pts.wt. and (iii) a phenolic based compound stabilizer other than the formula (1) of 0.01-2.0 pts.wt.
|
