Preparation method of modified nitrile rubber and modified nitrile rubber
A nitrile rubber modification technology, which is applied in the field of modified nitrile rubber and modified nitrile rubber preparation, can solve the problems of poor comprehensive performance of modified rubber, difficulty in uniform dispersion of ECO and NBR, etc., and achieve good processing performance , promote uniform dispersion and stable distribution, and eliminate the effect of two-phase interface
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[0014] The invention provides a preparation method of modified nitrile rubber, comprising the following steps:
[0015] A. Plasticizing chloroether rubber, then adding reinforcing filler, anti-aging agent and plasticizer for mixing to obtain chloroether rubber masterbatch;
[0016] B, the chloroether rubber masterbatch that step A obtains is dispersed in organic solvent to form chloroether rubber latex;
[0017] C, plasticizing the nitrile-butadiene rubber, then adding reinforcing filler, anti-aging agent and plasticizer for mixing to obtain nitrile-butadiene rubber masterbatch;
[0018] D. Blend the chloroether rubber latex and the nitrile rubber masterbatch at a temperature higher than the melting point of the organic solvent, then add acid absorbing agent, active agent and vulcanization accelerator for banburying, and finally add a vulcanizing agent for open refining , to obtain the modified nitrile rubber.
[0019] The preparation method of the modified nitrile rubber pr...
Example Embodiment
[0041] Example 1
[0042] (1) Weigh raw materials: 85 parts by weight of nitrile rubber, 15 parts by weight of chloroether rubber, reinforcing filler: 50 parts by weight of carbon black (N550) + 20 parts by weight of ultrafine calcium carbonate, plasticizer: 25 parts by weight RS-107, antioxidant: 1.5 parts by weight 445+0.5 parts by weight NBC, acid absorber: 10 parts by weight ZnO+5 parts by weight MgO+3 parts by weight Pb3O4, active agent: 1 part by weight zinc stearate, vulcanizing agent: 0.4 parts by weight of insoluble sulfur+2 parts by weight of DOTG, vulcanization accelerator: 1.5 parts by weight of TMTD+1 part by weight of CZ.
[0043] (2) 15 parts by weight of chloroether rubber is masticated for 10 minutes, and then 15 parts by weight of reinforcing filler, 0.5 parts by weight of antiaging agent and 7 parts by weight of plasticizer are added for 25 minutes to obtain chloroether rubber masterbatch ; Then cut it into small pieces with a width of 1mm, transfer it into...
Example Embodiment
[0046] Example 2
[0047] The modified nitrile rubber of the present embodiment is prepared by the same steps as in Example 1, except that:
[0048] In step (1), the amount of each raw material is: 95 parts by weight of nitrile rubber, 5 parts by weight of chloroether rubber, reinforcing filler: 40 parts by weight of carbon black (N550) + 15 parts by weight of ultrafine calcium carbonate, plasticizer : 20 parts by weight TP-90B, antioxidant: 1.5 parts by weight 445+0.5 parts by weight NBC, acid absorber: 8 parts by weight ZnO+5 parts by weight MgO+2 parts by weight Pb3O4, activator: 1.5 parts by weight zinc stearate , vulcanizing agent: 0.4 parts by weight insoluble sulfur + 2 parts by weight NA-22, vulcanization accelerator: 0.8 parts by weight TMTD + 1.5 parts by weight CZ;
[0049] In step (2), the consumption of reinforcing filler is 5 parts by weight, the consumption of anti-aging agent is 0.3 parts by weight, the consumption of plasticizer is 3 parts by weight; the cons...
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