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EPDM rubber and nitrile rubber compounded sealing ring material

A rubber nitrile and EPDM technology, applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of poor ozone resistance and electrical insulation performance of nitrile rubber, reduced elasticity and cold resistance, etc. Superior performance, high breaking strength, cost-saving effect

Inactive Publication Date: 2013-08-14
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 1

[0027] A kind of EPDM rubber nitrile rubber compound sealing ring material, it is made of the raw material of following weight parts:

[0028] Nitrile rubber 3345 80, EPDM rubber 20, antioxidant H 2, antioxidant MB 1, stearic acid 1, sulfur powder 0.8, microcrystalline wax 1.2, magnesium oxide 6, antimony trioxide 3, processing aids WB212 2, carbon black N550 60, semi-reinforcing carbon black N722 25, diethylene glycol dibenzoate 20, accelerator TMTD 1.5, accelerator TETD 1.5, accelerator DM 2, modified acrylate 9, Styrene-acrylonitrile-maleic anhydride copolymer3.

[0029] Modified acrylate is prepared by modifying the following raw materials in parts by weight:

[0030] Vinyl tertiary carbonate 9

[0031] Styrene 9

[0032] Acrylate 7

[0033] Sodium Allyloxy Hydroxypropyl Sulfonate 1

[0034] Polyvinyl alcohol 3

[0035] Acrylic 3

[0036] Isododecylmercaptan 0.1

[0037] Sodium persulfate 0.3

[0038] Antioxidant 1010 0.5

[0039] Butyl acetate 45;

[0040] The ...

Embodiment 2

[0045] A kind of EPDM rubber nitrile rubber compound sealing ring material, it is made of the raw material of following weight parts:

[0046] Nitrile rubber 3345 80, EPDM rubber 20, antioxidant H 2, antioxidant MB 1, stearic acid 1, sulfur powder 0.8, microcrystalline wax 1.2, magnesium oxide 6, antimony trioxide 3, processing aids WB212 2, carbon black N550 60, semi-reinforcing carbon black N722 25, diethylene glycol dibenzoate 20, accelerator TMTD 1.5, accelerator TETD 1.5, accelerator DM 2, modified acrylate 9, Styrene-acrylonitrile-maleic anhydride copolymer3.

[0047] The modified acrylate is silicone-modified acrylate.

[0048] The preparation process is:

[0049] First, nitrile rubber 3345, EPDM rubber, antioxidant H, antioxidant MB, stearic acid, sulfur powder, microcrystalline wax, magnesium oxide, antimony trioxide, processing aid WB212, modified acrylate, Styrene-acrylonitrile-maleic anhydride copolymer is put into an internal mixer and mixed completely at 70-75...

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Abstract

The invention discloses an EPDM rubber and nitrile rubber compounded sealing ring material which is prepared by weighing the raw materials of nitrile rubber 3345, EPDM rubber and the like according to a weight ratio, fully mixing the raw materials and then carrying out processing forming. The EPDM rubber and nitrile rubber compounded sealing ring material provided in the invention has high tensile strength at break; and the material is used for fabricating sealing rings, having the advantages of conservation of cost and excellent performance.

Description

technical field [0001] The invention relates to the field of sealing ring materials, in particular to a compound sealing ring material of EPDM rubber and nitrile rubber. Background technique [0002] EPDM rubber is a terpolymer of ethylene, propylene and non-conjugated dienes. Its most important feature is its superior resistance to oxidation, ozone and erosion. Since EPDM belongs to the polyolefin family, it has excellent vulcanization characteristics. Among all rubbers, EPDM has the lowest specific gravity. It can absorb large quantities of fillers and oils with little effect on properties. Inexpensive rubber compounds can thus be produced. [0003] 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 embrittle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/02C08L23/16C08L35/06C08L91/06C08L51/00C08K13/02C08K5/09C08K3/22C08K3/04C08K5/103C08F261/04C08F218/00C08F212/08C08F220/10C08F220/06C09K3/10
Inventor 邵仁杰王建平
Owner CGP WUHU SEALING