A method for producing a modified conjugated diene polymer comprising
a polymerization step of obtaining a conjugated diene polymer containing a nitrogen atom in a polymer chain and an active end by copolymerizing a conjugated diene compound and a nitrogen atom-containing vinyl compound, or a conjugated diene compound, an aromatic vinyl compound and a nitrogen atom-containing vinyl compound by use of an alkali metal compound and/or an alkaline earth metal compound as a polymerization initiator, and
a modification step of reacting a modifier, which is a compound represented by the following formula (1), with the active end of the conjugated diene polymer:
where R1 to R4 each independently represent an alkyl group having 1 to 20 carbon atoms or an aryl group having 6 to 20 carbon atoms; R5 represents an alkylene group having 3 to 10 carbon atoms; R6 represents an alkylene group having 1 to 20 carbon atoms; m is an integer of 1 or 2; and n is an integer of 2 or 3.
一种生产改性共轭二烯聚合物的方法,包括
聚合步骤:通过使用碱
金属化合物和/或碱土
金属化合物作为聚合
引发剂,共聚共轭二烯化合物和含氮原子的
乙烯基化合物,或共轭二烯化合物、芳香族
乙烯基化合物和含氮原子的
乙烯基化合物,获得在聚合物链中含有氮原子和活性端的共轭二烯聚合物,以及
改性步骤:将改性剂(由下式(1)表示的化合物)与共轭二烯聚合物的活性端反应:
其中 R1 至 R4 各自独立地代表具有 1 至 20 个碳原子的烷基或具有 6 至 20 个碳原子的芳基;R5 代表具有 3 至 10 个碳原子的亚烷基;R6 代表具有 1 至 20 个碳原子的亚烷基;m 是 1 或 2 的整数;n 是 2 或 3 的整数。