Carboxynitrosofluoroelastomer composition with low permanent deformation rate

A technology of carboxynitroso fluorine and rubber composition is applied in the field of rubber sealing parts, which can solve the problems of application limitation, compression permanent deformation and tearing permanent deformation rate, etc., and achieves convenient source, low toxicity, and high rubber mixing. Process safety and operability effects

Active Publication Date: 2012-10-24
CHINA BLUESTAR CHENGRAND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the CNR rubber obtained by using CTA as a vulcanizing agent, as the key index of sealing parts, the compression set and tearing set rate are relatively large, which limits its application.

Method used

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  • Carboxynitrosofluoroelastomer composition with low permanent deformation rate
  • Carboxynitrosofluoroelastomer composition with low permanent deformation rate
  • Carboxynitrosofluoroelastomer composition with low permanent deformation rate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 100 parts of CNR raw rubber, 25 parts of fumed white carbon black, 2.5 parts of methyl silicone oil, 1.2 parts of fluorinated graphite, 1.5 parts of palm wax, and 1.2 parts of TGIC into an open mill and knead evenly. Molding vulcanization on the vulcanizing machine under the condition of 145°C×15MPa for 40min, and then secondary vulcanization in 180°C hot air flow for 24h to obtain the sealed parts.

Embodiment 2

[0028] Add 100 parts of CNR raw rubber, 30 parts of fumed silica, 2 parts of methyl silicone oil, 1.5 parts of fluorinated graphite, 2 parts of polyethylene glycol, 2 parts of basic copper sulfate, and 1.8 parts of TGIC into the open mill Mix evenly, prefabricate, mold and vulcanize in a flat vulcanizing machine at 165°C×15MPa for 50 minutes, and then perform secondary vulcanization in 180°C hot air flow for 24 hours to obtain a sealed product.

Embodiment 3

[0030] Put 100 parts of CNR raw rubber, 30 parts of fumed white carbon black, 2.5 parts of methyl silicone oil, 1.5 parts of fluorinated graphite, 1 part of basic chromium trifluoroacetate, and 1.5 parts of TGIC into an open mill and knead evenly. Molding, molding and vulcanizing on a flat vulcanizing machine at 145°C × 15MPa for 40 minutes, and then secondary vulcanization in 180°C hot air flow for 24 hours to obtain a sealed part.

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Abstract

The invention relates to a carboxynitrosofluoroelastomer composition with low permanent deformation rate and a part preparation method thereof, and belongs to the field of rubber seal parts. The fluorelastomer composition is prepared from the following raw materials in parts by weight: 100 parts of carboxynitrosofluoroelastomer (CNR raw rubber), 20 to 40 parts of white black carbon, 1 to 3 parts of methylsilicone oil, 1 to 3 parts of triglycidyl isocyanurate (TGIC), and 1 to 3 parts of graphite fluoride. The preparation method comprises the following steps: uniformly blending on a two-roll mill, and performing; and performing two stages of vulcanizing and crosslinking on a press vulcanizer to obtain the fluoroelastomer seal part. According to the preparation method, TGIC is utilized as valcanizer of a vulcanization system, and the carboxynitrosofluoroelastomer composition has the advantages of small toxicity, excellent processing performance, high strength of vulcanized rubber, outstanding compression permanent deformation and tensile permanent deformation, and good seal property.

Description

technical field [0001] The invention relates to a fluororubber composition. Specifically, the invention relates to a low permanent deformation carboxynitroso fluororubber composition and a preparation method thereof, belonging to the field of rubber sealing parts. Background technique [0002] Carboxynitroso fluororubber (CNR) has excellent low-temperature performance (glass transition temperature Tg≤-45°C), and is resistant to strong oxidants N 2 o 4 It has super resistance to chemical media and other chemical media, as well as good adhesion and heat resistance. It will not burn even in pure oxygen. It is an indispensable sealing material in the aerospace field. It is used in chemical, electronic and There are also important uses in the field of new energy. [0003] CNR raw rubber is based on nitrosotrifluoromethane (ONCF 3 ), tetrafluoroethylene (TFE) as the main monomer, and a ternary rubber obtained by copolymerizing a small amount of vulcanization point monomer (nitr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/00C08L83/04C08K13/06C08K9/00C08K3/04C08K3/36C08K5/3492B29B7/52B29C35/02B29C35/04
Inventor 杨晓勇邓清田吴勇罗凯黎爽周楠徐亭
Owner CHINA BLUESTAR CHENGRAND CO LTD
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