Rubber anti-yellowing accelerator, preparation method thereof and rubber product
An anti-yellowing accelerator and rubber technology, which is applied in the field of rubber production, can solve the problems of reducing the internal mechanical properties of rubber products, affecting the normal use of rubber products, and breaking molecular chains, so as to improve quality, service life, and yellowing resistance. Elevate, enhance the effect of action
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Embodiment 1
[0051] A kind of rubber anti-yellowing accelerator, the weight parts of each substance refer to Example 1 in Table 2, and its preparation method comprises the following steps:
[0052] Step 1: Weigh the rubber according to the set ratio, add the rubber into the mixing chamber of the internal mixer and heat it up to 65°C, then plasticate and stir the rubber under the pressure of 20MPa and the rotor speed of 30rpm until the Mooney of the rubber is reached. The viscosity is reduced to 45;
[0053] Step 2: Weigh the remaining raw material components according to the set ratio, add the remaining raw material components into the mixing chamber of the internal mixer for mixing, raise the temperature to 85 ℃, then raise the top bolt and make the internal mixing chamber. The mixture was tumbled for 8s, then lowered the top bolt and continued to mix for 4min. Finally, the temperature was raised to 95 °C, and the material was discharged to obtain a rubber yellowing resistance accelerator...
Embodiment 2
[0055] A kind of rubber anti-yellowing accelerator, the weight parts of each substance refer to Example 2 in Table 2, the difference between its preparation method and Example 1 is that the temperature in step 1 is 80 ° C, and the Mooney viscosity is 35; The temperature after adding and mixing the remaining raw material components in the second step rose to 70°C, the mixture tumbling time was 15s, the mixing time after lowering the top bolt was 6min, and the temperature was raised to 80°C.
Embodiment 3
[0057] A kind of rubber anti-yellowing accelerator, the weight parts of each substance refer to Example 3 in Table 2, the difference between its preparation method and Example 1 is that the temperature in step 1 is 70 ° C, and the Mooney viscosity is 40; The temperature after adding and mixing the remaining raw material components in the second step rose to 80°C, the mixture tumbling time was 10s, the mixing time after lowering the top bolt was 5min, and the temperature was raised to 90°C.
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