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Modified nitrile rubber and preparation method thereof

A nitrile rubber, modified technology, applied in the field of modified nitrile rubber and its preparation, can solve the problems of poor wear resistance, low strength of nitrile rubber, etc., to prevent aggregation, improve poor dispersion, and high-efficiency dispersion Effect

Inactive Publication Date: 2022-01-21
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nitrile rubber has the problems of low strength and poor wear resistance.

Method used

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  • Modified nitrile rubber and preparation method thereof
  • Modified nitrile rubber and preparation method thereof
  • Modified nitrile rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] S1: Preparation of fluorinated carbon material dispersion: Add 500mL of deionized water to a beaker, add 5g of perfluorooctanoic acid, stir and dissolve it, add 5g of fluorinated graphene to prepare a pre-dispersion, and then sonicate in an ice-water bath Disperse for 1 hour to prepare a fluorinated graphene dispersion.

[0033] S2: Composite by emulsion method: Add the above-mentioned fluorinated graphene dispersion to 600g of nitrile latex and stir for 30 minutes, then ultrasonically disperse in an ice-water bath for 1 hour to obtain composite latex, add 10mL saturated NaCl solution to the composite latex to coagulate, and then Wash and dry to obtain the masterbatch, take 105g of the masterbatch, add 1.2g of sulfur, 2.4g of N-cyclohexyl-2-benzothiazole sulfenamide, 5g of zinc oxide and mix well, and finally hot press at 150°C to obtain modified nitrile Rubber sheet.

[0034] After testing, the tensile strength of the modified nitrile rubber sheet is 13.07MPa, the elo...

Embodiment 2

[0036] S1. Preparation of fluorinated carbon material dispersion: add 500mL of deionized water to a beaker, add 5g of perfluorooctanoic acid, stir and dissolve it, add 7g of fluorinated graphene to prepare a pre-dispersion, and then sonicate in an ice-water bath Disperse for 2 hours to prepare a fluorinated graphene dispersion.

[0037] S2, compound by emulsion method: add the above-mentioned fluorinated graphene dispersion to 600g nitrile latex and stir for 30 minutes, then ultrasonically disperse in an ice-water bath for 2 hours to obtain composite latex, add 10mL saturated NaCl solution to coagulate in composite latex, and then Wash and dry to obtain masterbatch, take 107g of masterbatch, add 1.2g of sulfur, 2.4g of N-cyclohexyl-2-benzothiazole sulfenamide, 5g of zinc oxide and mix well, and finally hot press at 150°C to obtain modified nitrile Rubber sheet.

[0038] After testing, the tensile strength of the modified nitrile rubber sheet is 15.83MPa, the elongation at bre...

Embodiment 3

[0040] S1. Preparation of fluorocarbon material dispersion: add 500mL of deionized water to a beaker, add 5g of potassium perfluorooctane sulfonate, stir and dissolve it, add 5g of fluorinated graphene to prepare a pre-dispersion, Then ultrasonically disperse in an ice-water bath for 1 hour and 30 minutes to prepare a fluorinated graphene dispersion.

[0041] S2, compounding by emulsion method: add the above-mentioned fluorinated graphene dispersion to 600g nitrile latex and stir for 30 minutes, then ultrasonically disperse in an ice-water bath for 2 hours to obtain composite latex, add 5mL saturated CaCl to the composite latex 2 The solution is coagulated, and then washed and dried to obtain the masterbatch. Take 105g of the masterbatch, add 1.2g of sulfur, 2.4g of N-cyclohexyl-2-benzothiazole sulfenamide, and 5g of zinc oxide, mix well, and finally hot press at 150°C A modified nitrile rubber sheet was obtained.

[0042] After testing, the tensile strength of the modified n...

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Abstract

The invention belongs to the field of high polymer materials, and particularly relates to modified nitrile rubber and a preparation method thereof.The modified nitrile rubber is prepared from, by weight, 0.3-10 parts of fluorocarbon surfactant, 0.3-10 parts of carbon fluoride material, 50-600 parts of nitrile rubber latex, 3-20 parts of saturated salt solution, 1-3 parts of sulfur, 1-3 parts of accelerant, 1-5 parts of zinc oxide and 41.5-1000 parts of deionized water; according to the present invention, the dispersion of the carbon fluoride material in the rubber matrix is improved by the fluorocarbon surfactant, and the stress transfer rate of the nitrile rubber material during the stress is further improved; the carbon fluoride material has the lubricating effect so as to simultaneously improve the mechanical property strength and the wear resistance of the nitrile rubber; and the method is simple and easy to perform.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a modified nitrile rubber and a preparation method thereof. Background technique [0002] Nitrile rubber is a copolymer prepared by low-temperature emulsion polymerization of acrylonitrile and butadiene monomers. It has excellent oil resistance, good heat resistance, strong adhesion, good water resistance and air tightness, and is widely used in the production of various oil-resistant rubber products, various oil-resistant gaskets, gaskets, casings, Flexible packaging, soft hoses, printing and dyeing rubber rollers, cable adhesive materials, etc., have become indispensable materials in industries such as automobiles, aviation, petroleum, and copying. However, nitrile rubber has the problems of low strength and poor wear resistance. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a modified nitrile r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08K3/04C08K3/06C08K3/22C08K5/47C08K9/04C08J5/18
CPCC08K3/04C08K3/041C08K3/042C08K3/06C08K3/22C08K5/47C08K9/04C08J5/18C08J2309/02C08K2003/2296C08L9/02
Inventor 王亚男索军营侯平安唐帅姜胜洋
Owner CHENGDU AIRCRAFT INDUSTRY GROUP