Preparation method of nitrile-butadiene rubber blend, and nitrile-butadiene rubber blend and application thereof

Abstract

The invention relates to a preparation method of a nitrile-butadiene rubber blend. The preparation method comprises the following steps: 1) carrying out thin passing on a para-aramid short fiber master batch on an open mill, wherein the discharge batch is for later use; 2) sufficiently blending and mixing nitrile-butadiene rubber, the para-aramid short fiber master batch treated by the step 1), zinc oxide, carbon black and/or white carbon black in a Banbury mixer to obtain first compounded rubber; 3) carrying out thin passing on the first compounded rubber on an open mill until no yellow granular fibrous matters are visible, thereby obtaining second compounded rubber; 4) putting the second compounded rubber into a Banbury mixer, adding stearic acid, an anti-aging agent and a plasticizer, and sufficiently blending and mixing to obtain third compounded rubber; 5) adding a vulcanizing agent and an accelerator into the third compounded rubber at 50-100 DEG C, and blending until the vulcanizing agent is completely absorbed, thereby obtaining fourth compounded rubber; and 6) milling the fourth compounded rubber in an open mill, and discharging to obtain the nitrile-butadiene rubber blend. The invention also relates to a nitrile-butadiene rubber blend prepared by the method and application of the nitrile-butadiene rubber blend.

Description

technical field [0001] The invention relates to a preparation method, in particular to a preparation method of a blend. The invention also relates to the blends produced by this method, and their use. Background technique [0002] Among general-purpose rubbers, nitrile rubber has the best oil resistance, and is widely used in the automotive industry and petroleum industry to manufacture rubber seals, hoses, tapes, etc. Although nitrile rubber is a kind of polar rubber, the modulus of the rubber material is not high, and rubber products need higher modulus of rubber in order to improve the load-bearing capacity and solvent resistance of the product. [0003] There are generally three commonly used methods to improve the modulus of nitrile rubber. By increasing the content of acrylonitrile, increasing the Mooney viscosity of the compound and increasing the carbon black content of the compound, the modulus of the compound can be improved. [0004] But the modulus of elongatio...

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Problems solved by technology

[0004] But the modulus of elongation that these three kinds of methods improve is very limited, adopt high acrylonitrile content at the same time, increase the Mooney viscosity of sizing material and will lose the proc

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