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Rubber composition of nitrile rubber and epoxidized natural rubber

A rubber composition and nitrile rubber technology, applied in the field of rubber materials, can solve the problems of poor ozone resistance and electrical insulation performance of nitrile rubber, reduced elasticity and cold resistance, etc., and achieve excellent performance, low compression set, good elasticity

Inactive Publication Date: 2012-10-17
CGP WUHU SEALING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of nitrile rubber is affected by the content of acrylonitrile. As the content of acrylonitrile increases, the tensile strength, heat resistance, oil resistance, air tightness and hardness increase, but the elasticity and cold resistance decrease.
Nitrile rubber has poor ozone resistance and electrical insulation properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The rubber composition of acrylonitrile-butadiene rubber and epoxidized natural rubber, it is made by the raw material of following weight part:

[0015] Nitrile rubber 3345 90, epoxidized natural rubber 20, antioxidant RD 1.5, antioxidant MB 1, stearic acid 0.8, sulfur powder 0.5, microcrystalline wax 1, zinc oxide 5, processing aid WB212 1, white carbon black 60, carbon black N330 30, triethyl citrate 40, accelerator TMTD 1.5, accelerator CZ 1.5, accelerator DM 2, nano barite 2, light calcium carbonate 5, chalk 2, high styrene resin 2, Benzoic acid2.

[0016] The preparation process is:

[0017] First, nitrile rubber 3345, epoxidized natural rubber, antioxidant RD, antioxidant MB, stearic acid, sulfur powder, microcrystalline wax, zinc oxide, processing aid WB212, light calcium carbonate, benzoic acid, chalk, Put the high styrene resin into the internal mixer at 75°C and mix completely according to the weight part, then put the obtained rubber material, white carbon...

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PUM

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Abstract

The invention discloses a rubber composition of nitrile rubber and epoxidized natural rubber. The rubber composition is prepared from nitrile rubber 3345, epoxidized natural rubber, antioxidant RD, antioxidant MB, stearic acid, sulfur powder, microcrystalline wax, zinc oxide, processing aid WB212, white carbon black, carbon black N330, triethyl citrate, promoter TMTD, promoter CZ, promoter DM, nanometer barite, light calcium carbonate, chalk, high styrene resin, benzoic acid, etc. The rubber composition provided in the invention has low permanent compression deformation, good elasticity and high hardness; the composition is used for fabricating rubber products like sealing rings, having the advantages of conservation of cost and excellent performance.

Description

technical field [0001] The invention relates to the field of rubber materials, in particular to a rubber composition of nitrile rubber and epoxidized natural rubber. Background technique [0002] Nitrile rubber is also called butadiene-acrylonitrile rubber, referred to as NBR, with an average molecular weight of about 700,000. Off-white to light yellow massive or powdery solid, relative density 0.95-1.0. The glass transition temperature of nitrile rubber with 26% acrylonitrile content is Tg=-52°C, and the embrittlement temperature Tb=-47°C, while the glass transition temperature of nitrile rubber with 40% acrylonitrile content is Tg=-22°C. Solubility parameter δ=8.9~9.9, soluble in ethyl acetate, butyl acetate, chlorobenzene, methyl ethyl ketone, etc. Nitrile rubber has excellent oil resistance, its oil resistance is second only to polysulfide rubber and fluorine rubber, and it has excellent wear resistance and air tightness. The disadvantage of NBR is that it is not resi...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08L15/00C08K13/02C08K5/09C08K3/06C08K3/22C08K3/36C08K3/04C08K5/11C08K3/30C08K3/26B29B7/28B29B7/72
Inventor 邵仁杰王建平
Owner CGP WUHU SEALING
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