| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a simpler method for producing a composition mainly comprising an oligomer of 2,2,4-trimethyl-1,2-dihydroquinoline and having a primary amine content of ≤1 mass%. <P>SOLUTION: The method for producing a composition containing an oligomer of 2,2,4-trimethyl-1,2-dihydroquinoline includes a step of mixing a polycondensate of aniline and acetone and of ≥2 mass% of a primary amine obtained by converting one amino group (-NH<SB POS="POST">2</SB>) into one aniline molecule with sulfonyl chloride. The rubber composition is obtained by mixing 100 pts.wt. of raw material rubber selected from the group consisting of natural rubber and diene-based rubber, 2-10 pts.wt. of insoluble sulfur, and 0.5-5 pts.wt. of the oligomer-containing composition. <P>COPYRIGHT: (C)2013,JPO&INPIT |
