Multifunctional nano CaCO3 reinforced nitrile rubber
A nitrile butadiene rubber, multi-functional technology, applied in fibrous filler, dyed low molecular organic compound treatment, dyed organic silicon compound treatment and other directions, can solve the problems of poor elasticity, insufficient wear resistance, poor rubber plasticity, etc. The service life, rubber strength increase, plasticity increase obvious effect
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example 1
[0010] Example 1: Reinforced rubber formulation and preparation process
[0011] The mastication of nitrile rubber is different from that of general-purpose rubber. It requires low temperature, small roller distance, and low-capacity thin pass method, so as to effectively obtain a certain degree of plasticity. Under normal temperature conditions, masticate 65% nitrile rubber raw rubber on an open mill for about 10 minutes until it is covered with rolls. The temperature of the roll is 45-55°C. Note that the temperature of the front roll of the double-roller plastic mixer must be about 10°C higher than the temperature of the rear roll, and the roll distance is 1mm. Put the masticated nitrile rubber in the air for 2 to 6 hours before kneading. The mixing of nitrile rubber adopts low temperature mixing, and the roller temperature is 40-60°C. Put the masticated nitrile rubber on the mixer, and slowly add 1% sulfur, 5% active zinc oxide, 25% modified nano-calcium carbonate, 0.6% a...
example 2
[0012] Example 2: Rubber Reinforcing Auxiliary Nano-CaCO 3 modification method
[0013] Nano-CaCO 3 Dry the powder at 200-210°C for 1.5 hours to make it fully dry; then dilute the surfactant silane coupling agent with acetone, that is, bis-[Y-(triethoxysilyl)propyl]-tetrafluoroethylene Sulfide, or emulsifier OP-10, that is, the condensation product of alkylphenol and ethylene oxide, the volume ratio is 20:1; the pressure is controlled at 0.3MPa~0.5MPa, and the spray method is used under the condition of uniform stirring Treatment of well-dried nano-CaCO with acetone-diluted surfactant silane coupling agent 3 ; Finally, at a temperature of 70-90 ° C, dry the above mixture to completely volatilize the acetone to obtain a modified nano-CaCO 3 .
example 3
[0014] Example 3: Rubber mixing process
[0015] Nitrile rubber is mixed at low temperature, and the roller temperature is controlled at 45-55°C5. Put the masticated nitrile rubber on the mixer, and slowly add sulfur, active zinc oxide, modified nano-calcium carbonate, anti-aging agent 264, dioctyl phthalate, stearin in sequence after several times of thinning Acid, Accelerator-DM, Accelerator-CZ. During the mixing process, if roll sticking occurs, appropriate amount of dioctyl phthalate or stearic acid should be added alternately, but the total amount must be consistent with the formula. After mixing evenly, the obtained mixed rubber can be vulcanized after being parked for 16 hours.
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