A mixing process for improving the processing performance of high-ratio rare earth butadiene rubber

Abstract

The application relates to a mixing process for improving the processing performance of high-number-ratio rare earth butadiene rubber, which comprises the following steps: 50-70 parts of natural rubber, 30-35 parts of carbon black and 1-1.5 parts of antioxidant are rolled to obtain a first-stage masterbatch; the first-stage masterbatch, 30-50 parts of rare earth butadiene rubber, 3-4 parts of zinc oxide, 1.5-2.5 parts of stearic acid, 1-2 parts of protective wax and 10-25 parts of carbon black are rolled to obtain a second-stage masterbatch, which is the high-number-ratio rare earth butadiene rubber. The natural rubber, the carbon black and the antioxidant are first rolled to obtain the first-stage masterbatch; then the first-stage masterbatch, the rare earth butadiene rubber, the zinc oxide, the stearic acid, the protective wax and the remaining carbon black are rolled to obtain the second-stage masterbatch, which is the high-number-ratio rare earth butadiene rubber. The rolling processes of the first-stage masterbatch and the second-stage masterbatch are both low-temperature and low-speed mixing, and the final masterbatch obtained after the second-stage masterbatch is added with vulcanizing agents (sulfur 1-1.3 parts and accelerator CZ 1.2-1.4 parts) has a smooth surface, low porosity and low return rate.

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