A catalyst containing a quaternary ammonium salt represented by the following general formula (1) is used as a catalyst for dissociation of a blocking agent.
[In the formula, each of R1 to R3 represents an aliphatic hydrocarbon group having 1 to 8 carbon atoms or an aromatic hydrocarbon group having 6 to 14 carbon atoms; R4 represents an aliphatic hydrocarbon group having 9 to 20 carbon atoms; X represents at least one member selected from the group consisting of a phosphate group, a borate group, a hydrogencarbonate group, a monoalkylcarbonate group and a carbonate group; a is an integer in the range of 1 to 3; and b is an integer in the range of 1 to 3.]
含有以下通式 (1) 所代表的季
铵盐的催化剂可用作封端剂的解离催化剂。
[式中,R1 至 R3 分别代表具有 1 至 8 个碳原子的脂肪族烃基或具有 6 至 14 个碳原子的芳香族烃基;R4 代表具有 9 至 20 个碳原子的脂肪族烃基;X 代表至少一个选自
磷酸盐基、
硼酸盐基、
碳酸氢盐基、
碳酸单烷基盐基和
碳酸盐基的成员;a 是 1 至 3 之间的整数;b 是 1 至 3 之间的整数]。