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Semi-conductive silicone rubber roller material with highly repeated charge and discharge properties and preparation method thereof

A semi-conductive, silicone rubber technology, applied in the field of semi-conductive composite material preparation, can solve the problems of small resistance change, volume resistivity change, complex conduction mechanism, etc., to achieve stable resistance, reduce volume resistivity, and ensure image output effect. Effect

Inactive Publication Date: 2019-01-29
广州德润橡胶制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is not easy to obtain a material with a small change in resistance and stable performance. In addition, the conductive mechanism is complex, and the rise and fall of the applied voltage will lead to changes in the conductive path, as well as factors such as durable dielectric loss, so that the volume resistivity Significant changes ensued, and it was not easy to resolve

Method used

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  • Semi-conductive silicone rubber roller material with highly repeated charge and discharge properties and preparation method thereof
  • Semi-conductive silicone rubber roller material with highly repeated charge and discharge properties and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1 The preparation of the semi-conductive silicone rubber roller material of high repeated charge and discharge

[0036] Composition of raw materials by weight: 80 parts of methyl vinyl silicone rubber; 20 parts of EPDM rubber; 12 parts of conductive masterbatch A; 8 parts of conductive masterbatch B; 3 parts of crosslinking agent DCP;

[0037] The conductive masterbatch A is prepared by the following method: (1) Preparation of conductive agent: After mixing carbon black and graphene, place it in a mixed acid solution composed of concentrated sulfuric acid and concentrated nitric acid, and carry out a reflux reaction at 80°C for 6h , after washing and drying, the acidified carbon black and graphene mixture is obtained; then the acidified carbon black and graphene mixture is dispersed in absolute ethanol, then n-octylamine is added, heated to reflux for 12h, filter, wash the precipitate and Drying is carried out to obtain the conductive agent; (2) the conductiv...

Embodiment 2

[0040] Embodiment 2 The preparation of the semi-conductive silicone rubber roller material of high repeated charge and discharge

[0041] Composition by weight of raw materials: 60 parts of methyl vinyl silicone rubber; 40 parts of EPDM rubber; 15 parts of conductive masterbatch A; 5 parts of conductive masterbatch B; 1 part of crosslinking agent DCP;

[0042] The conductive masterbatch A is prepared by the following method: (1) Preparation of conductive agent: carbon black and graphene are mixed and then placed in a mixed acid solution composed of concentrated sulfuric acid and concentrated nitric acid, and reflux reaction is carried out at 90°C for 5h After washing and drying, the acidified carbon black and graphene mixture is obtained; then the acidified carbon black and graphene mixture is dispersed in absolute ethanol, then n-octylamine is added, heated to reflux for 15 hours, filtered, washed and Drying is carried out to obtain the conductive agent; (2) the conductive ag...

Embodiment 3

[0045] Embodiment 3 Preparation of semi-conductive silicone rubber roller material with high repeated charge and discharge properties

[0046] Composition by weight of raw materials: 50 parts of methyl vinyl silicone rubber; 50 parts of EPDM rubber; 10 parts of conductive masterbatch A; 10 parts of conductive masterbatch B; 5 parts of crosslinking agent DCP;

[0047] The conductive masterbatch A is prepared by the following method: (1) Preparation of conductive agent: After mixing carbon black and graphene, place it in a mixed acid solution composed of concentrated sulfuric acid and concentrated nitric acid, and carry out a reflux reaction at 80°C for 6h After washing and drying, the acidified carbon black and graphene mixture is obtained; then the acidified carbon black and graphene mixture is dispersed in absolute ethanol, then n-octylamine is added, heated to reflux for 10 hours, filtered, washed and Drying is carried out to obtain the conductive agent; (2) the conductive a...

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Abstract

The invention relates to the technical field of preparation of semi-conductive composite materials, and particularly discloses a semi-conductive silicone rubber roller material with highly repeated charge and discharge properties and a preparation method thereof. The semi-conductive silicone rubber roller material with highly repeated charge and discharge properties is made of the following raw materials in parts by weight: 50-90 parts of methyl vinyl silicone rubber, 10-50 parts of ethylene propylene diene monomer, 8-15 parts of conductive masterbatch A, 5-12 parts of conductive masterbatch B, and 1-5 parts of cross-linking agent. The volume resistivity of the semi-conductive silicone rubber roller material is in a range of 0.42*10<4>-0.88*10<4> [omega]*cm in a semi-conductive region (ie,about 105-109 [omega]*cm), and the resistance of the material is extremely stable, and in a high-temperature high-moisture environment, no chemical substance that oozes a photosensitive drum seeps; and in addition, the material has good printing durability, can ensure stable image output, and has a long service life.

Description

technical field [0001] The invention relates to the technical field of preparation of semiconductive composite materials, in particular to a semiconductive silicone rubber roller material with high repeated charge and discharge performance and a preparation method thereof. Background technique [0002] In recent years, office equipment such as laser printers and laser all-in-one machines using the imaging principle of electronic imaging (electrophotography) have been popularized and used on a large scale. Semi-conductive rubber products such as charging roller (PCR), developing roller (DVR), transfer roller, cleaning roller, and transfer belt are used as key components, and cooperate with photosensitive drum, toner, and magnetic roller to form a commonly used A toner cartridge called a "cartridge". [0003] Since the charging roller, developing roller and photosensitive drum are in direct contact, the precious elasticity unique to the rubber material in the polymer material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L23/16C08K9/02C08K9/04C08K3/04C08J3/22
CPCC08J3/226C08J2323/16C08J2383/07C08J2423/16C08K3/04C08K3/042C08K9/02C08K9/04C08K2201/001
Inventor 曾昭宇何华明梁剑春刘兰香
Owner 广州德润橡胶制品有限公司
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