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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

Active Publication Date: 2013-09-18
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the technical problem that ECO and NBR are difficult to uniformly disperse in the ECO modified nitrile rubber in the prior art, resulting in poor comprehensive performance of the modified rubber

Method used

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  • Preparation method of modified nitrile rubber and modified nitrile rubber
  • Preparation method of modified nitrile rubber and modified nitrile rubber
  • Preparation method of modified nitrile rubber and modified nitrile rubber

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preparation example Construction

[0014] The invention provides a kind of preparation method of modified nitrile rubber, comprises the following steps:

[0015] A, plasticizing the epichlorohydrin rubber, then adding reinforcing fillers, anti-aging agents and plasticizers for mixing to obtain the epichlorohydrin rubber masterbatch;

[0016] B, the chloroether rubber masterbatch that step A obtains is dispersed in organic solvent and forms chloroether rubber latex;

[0017] C, the nitrile rubber is masticated, then add reinforcing filler, anti-aging agent and plasticizer to mix, obtain the nitrile rubber masterbatch;

[0018] D. Blend the chloroether rubber latex and 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 vulcanizing agent for kneading , to obtain the modified nitrile rubber.

[0019] The preparation method of the modified nitrile rubber provided ...

Embodiment 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 of 445+0.5 parts by weight of NBC, acid absorbing agent: 10 parts by weight of ZnO+5 parts by weight of MgO+3 parts by weight of Pb3O4, active agent: 1 part by weight of 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) Plasticize 15 parts by weight of chloroether rubber for 10 minutes, then add 15 parts by weight of reinforcing filler, 0.5 parts by weight of anti-aging agent and 7 parts by weight of plasticizer and knead for 25 minutes to obtain a masterbatch of chloroether rubber ; Then cut it into small pieces with a width of 1 mm, tra...

Embodiment 2

[0047] Adopt the step identical with embodiment 1 to prepare the modified nitrile rubber of present embodiment, difference is:

[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 of TP-90B, antioxidant: 1.5 parts by weight of 445+0.5 parts by weight of NBC, acid absorbing agent: 8 parts by weight of ZnO+5 parts by weight of MgO+2 parts by weight of Pb3O4, activator: 1.5 parts by weight of 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 amount of reinforcing filler is 5 parts by weight, the amount of anti-aging agent is 0.3 parts by weight, the amount of plasticizer is 3 parts by weight; the amount of...

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Abstract

The invention provides a preparation method of modified nitrile rubber. The method comprises the following steps of: A, plasticating chloric ether rubber, and adding a reinforcing filler, an antiaging agent and a plasticizer to mix so as to obtain masterbatch of chloric ether rubber; B, dispersing the masterbatch of chloric ether rubber in an organic solvent to form chloric ether rubber latex; C, plasticating the nitrile rubber, and adding a reinforcing filler, an antiaging agent and a plasticizer to mix so as to obtain masterbatch of nitrile rubber; D, blending masterbatches of chloric ether rubber and nitrile rubber, adding an acid absorber, an activating agent and a vulcanization accelerator to mix, and then adding a vulcanizer for open mill to obtain the modified nitrile rubber. The invention further provides modified nitrile rubber prepared by the preparation method. In the preparation method of modified nitrile rubber provided by the invention, first, chloric ether rubber is prepared as latex which is easy to disperse from nitrile rubber, so that modified nitrile rubber which is uniformly dispersed, and good in processing performance, low temperature and weather ability is prepared.

Description

technical field [0001] The invention belongs to the field of rubber preparation, in particular to a preparation method of modified nitrile rubber and the modified nitrile rubber prepared by the preparation method. Background technique [0002] The biggest feature of nitrile rubber (NBR) is its excellent oil resistance, but because the main chain of NBR contains double bonds, its heat aging resistance, weather resistance and chemical stability are poor. The main chain of epichlorohydrin rubber (ECO) is composed of ether bond and carbon-carbon single bond, and the side chain contains chlorine atoms. It has good heat aging resistance, ozone resistance, excellent oil resistance, low temperature resistance and adhesive performance. Therefore, by mixing chloroether rubber into nitrile rubber, the ozone aging resistance, heat aging resistance, low temperature resistance and adhesion performance of NBR rubber can be improved, thereby greatly broadening the application range of NBR r...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08L71/03C08J3/22
Inventor 孙敬
Owner BYD CO LTD
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