A power transmission belt comprising rubber parts, at least one of which comprises a rubber composition containing a thiourea compound represented by the general formula (I):
wherein each of R1, R2, R3 and R4 is independently hydrogen atom or a hydrocarbon group having 1 to 12 carbon atoms, and at least three of said R1, R2, R3 and R4 are hydrocarbon groups having 1 to 12 carbon atoms in an amount of 0.1 to 2.5 parts by weight based upon 100 parts by weight of sulfur-modified chloroprene rubber. The power transmission belt of the present invention inhibits the generation of strange sound during working of the belt and shows long span of belt life.
一种动力传动带,包括橡胶部件,其中至少一个部件包括含有通式(I)代表的
硫脲化合物的橡胶组合物:
其中 R1、R2、R3 和 R4 各自独立地为氢原子或具有 1 至 12 个碳原子的烃基,且上述 R1、R2、R3 和 R4 中至少有三个为具有 1 至 12 个碳原子的烃基,其用量为 0.1 至 2.5 份(以 100 份
硫磺改性
氯丁橡胶的重量计)。本发明的动力传动皮带可抑制皮带工作时产生的怪声,皮带寿命长。