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Low-mooney rubber material applicable to injection vulcanization and preparation method of low-Mooney rubber material

A rubber material, injection pressure vulcanization technology, applied in the field of rubber, can solve the problems of uneven distribution of fillers, inability to satisfy rapid vulcanization and crosslinking, and affect the Mooney viscosity and performance of rubber materials, so as to increase the crosslinking density and promote rubber vulcanization , Improve the effect of tensile properties and wear resistance

Inactive Publication Date: 2019-08-23
NINGGUO ZHENGDAO RUBBER & PLASTIC PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the obtained rubber material has a low Mooney viscosity, it cannot meet the characteristics of realizing rapid vulcanization and crosslinking; and its reinforcing filler-white carbon black (including super white carbon black and high wear-resistant white carbon black) They are all directly added to rubber for blending and mastication, and there will be uneven distribution of fillers, which will affect the Mooney viscosity and properties of rubber materials.

Method used

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  • Low-mooney rubber material applicable to injection vulcanization and preparation method of low-Mooney rubber material

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preparation example Construction

[0037] The preparation method of described rubber material, comprises the steps:

[0038] Step S1, first adjust the roller distance to 1mm, put the weighed EPDM rubber on the roller, make the raw rubber cover the roller, and ensure that there is a certain amount of rubber accumulation, plasticize for 6-10 times, and then press down Slice, cool, park for 4-8h, and then carry out the second mastication of the parked rubber material, and then slice, cool and park again;

[0039] Step S1, adjust the roller distance to 6-10mm, add anti-aging agent, zinc oxide and stearic acid to the plasticized rubber material prepared in step S1, and add white carbon black after the rubber material is mixed for 3-4 minutes , flow agent, microcrystalline paraffin and paraffin oil, continue to mix for 20-30 minutes, cut the knife left and right twice to make pre-mixed rubber;

[0040] Step S3, adding accelerators and auxiliary agents to the premixed rubber prepared in step S2, and broaching the lef...

Embodiment 1

[0043] A low Mooney rubber material suitable for injection vulcanization, made of the following raw materials in parts by weight: 80 parts of EPDM rubber, 60 parts of white carbon black, 4 parts of zinc oxide, 1 part of stearic acid, flow agent 0.5 parts, 1 part of anti-aging agent, 0.8 parts of microcrystalline paraffin, 20 parts of paraffin oil, 2 parts of accelerator; 1 part of auxiliary agent;

[0044] The rubber material is made by the following steps:

[0045] Step S1, first adjust the roller distance to 1mm, put the weighed EPDM rubber on the roller, make the raw rubber cover the roller, and ensure that there is a certain amount of rubber accumulation, masticate 6 times, and then unload, Cool, park for 4 hours, and then carry out the second mastication of the parked rubber material, and then release, cool and park again;

[0046] Step S1, adjust the roller distance to 6mm, first add anti-aging agent, zinc oxide and stearic acid to the plasticized rubber material prepar...

Embodiment 2

[0050] A low Mooney rubber material suitable for injection vulcanization, made of the following raw materials in parts by weight: 90 parts of EPDM rubber, 70 parts of white carbon black, 4.5 parts of zinc oxide, 1.5 parts of stearic acid, flow agent 0.8 parts, 1.5 parts of anti-aging agent, 0.9 parts of microcrystalline paraffin, 23 parts of paraffin oil, 2.5 parts of accelerator; 1.5 parts of auxiliary agent;

[0051] The rubber material is made by the following steps:

[0052] Step S1, first adjust the roller distance to 1mm, put the weighed EPDM rubber on the roller, make the raw rubber cover the roller, and ensure that there is a certain amount of rubber accumulation, masticating 8 times, and then the film, Cool, park for 6 hours, then carry out the second mastication of the parked rubber material, and then release, cool and park again;

[0053] Step S1, adjust the roller distance to 8mm, add anti-aging agent, zinc oxide and stearic acid to the plasticized rubber material...

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Abstract

The invention discloses a low-Mooney rubber material applicable to injection vulcanization. The low-Mooney rubber material is prepared from the following raw materials in parts by weight: 80-100 partsof an ethylene-propylene-diene monomer, 60-80 parts of white carbon black, 4-5 parts of zinc oxide, 1-2 parts of stearic acid, 0.5-1 part of a flowing agent, 1-2 parts of an anti-aging agent, 0.8-1 part of a microcrystalline wax, 20-25 parts of paroline, 2-3 parts of an accelerant and 1-2 parts of aids. The invention furthermore discloses a preparation method of the rubber material. Due to adoption of a softening agent, namely the paroline, in rubber materials, and due to process adjustment the preparation process, the property that a rubber material is rapidly vulcanized can be met; meanwhile, the dispersibility of the white carbon black can be improved, and the tension and wearing resistance of the rubber material can be improved; and the rubber material which is low in mooney viscosityand high in vulcanization efficiency and is applicable to an injection process can be prepared.

Description

technical field [0001] The invention belongs to the technical field of rubber, and in particular relates to a low Mooney rubber material suitable for injection vulcanization and a preparation method thereof. Background technique [0002] Injection pressure vulcanization is a method developed on the basis of flat vulcanization and plastic main injection molding. It is a progress of model pressure vulcanization. The rubber is automatically injected into the heated mold through the injection barrel for molding vulcanization. high degree of automation. It belongs to the pressure vulcanization method. The vulcanization of the pressure vulcanization method is carried out under pressure. The product structure is dense, not easy to produce bubbles, the surface is smooth, and the pattern is clear. The pressure can be provided by water or oil, that is, water pressure, oil pressure, etc. are used. The heating medium is generally steam, electric heating and hot liquid. [0003] The ...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08L91/06C08K13/02C08K3/36C08K3/22C08K5/09C08K5/00
CPCC08K2003/2296C08L23/16C08L91/06C08K13/02C08K3/36C08K3/22C08K5/09C08K5/0091
Inventor 夏礼安陶华伟
Owner NINGGUO ZHENGDAO RUBBER & PLASTIC PARTS
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