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Rubber sealing material and preparation method thereof

A rubber seal and low-density polyethylene technology, applied in the field of materials, can solve the problems of poor mechanical properties and oil resistance stability, imports, and difficulty in meeting the use requirements of automotive seals, etc., to achieve small permanent compression deformation, good Shore hardness, good The effect of oil resistance

Inactive Publication Date: 2021-09-24
SHENZHEN LOTUT INNOVATION DESIGN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the mechanical properties and oil resistance stability of domestically produced acrylic rubber are poor, and it is difficult to meet the requirements for the use of automotive seals. Therefore, the demand for acrylic rubber in the domestic market is almost all imported.

Method used

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  • Rubber sealing material and preparation method thereof
  • Rubber sealing material and preparation method thereof

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preparation example Construction

[0014] The preparation method of the rubber sealing material provided by the embodiment of the present invention uses methyl acrylate and low-density polyethylene as the base material, and is compounded with raw materials such as modified ceramic particle powder and modified sericite cloud powder, and then processed twice The rubber sealing material was prepared by vacuum mixing. The rubber sealing material has good Shore hardness, tensile breaking strength, tensile breaking elongation, tearing strength, and is resistant to hot air aging, permanent compression deformation is small, and has good oil resistance, which can meet the needs of automotive seals. usage requirements.

[0015] The embodiment of the present invention provides a method for preparing a rubber sealing material, comprising the following steps:

[0016] Step 101, weigh each component according to the following parts by weight for later use: 30-40 parts of methyl acrylate, 25-30 parts of low-density polyethyl...

Embodiment 1

[0033] The preparation steps of the rubber sealing material of the embodiment of the present invention are as follows:

[0034]Take each component by following parts by weight for subsequent use: 30 parts of methyl acrylate, 30 parts of low-density polyethylene, 10 parts of paraffin oil, 2 parts of modified ceramic particle powder, 3 parts of modified sericite cloud powder, vulcanizing agent ( Hexamethylenediamine carbamate) 0.5 part, accelerator (diphenylguanidine) 0.1 part, processing aid (potassium persulfate) 0.1 part. Methyl acrylate, low-density polyethylene, paraffin oil, modified ceramic particle powder, modified sericite cloud powder, vulcanizing agent, accelerator, processing aid are mixed and fed into a twin-screw extruder for shearing, Under the temperature condition of 75°C, vacuum kneading for 2 minutes to obtain the primary mixing material; raise the temperature of the above-mentioned primary mixing material to 85 °C, and vacuum kneading for 3 minutes to obtain ...

Embodiment 2

[0038] The preparation steps of the rubber sealing material of the embodiment of the present invention are as follows:

[0039] Take each component for subsequent use by following parts by weight: 40 parts of methyl acrylate, 25 parts of low-density polyethylene, 20 parts of paraffin oil, 8 parts of modified ceramic particle powder, 7 parts of modified sericite cloud powder, vulcanizing agent ( Hexamethylenediamine carbamate) 3 parts, accelerator (o-tolylbiguanide) 0.5 part, processing aid (ammonium persulfate) 0.2 part. Methyl acrylate, low-density polyethylene, paraffin oil, modified ceramic particle powder, modified sericite cloud powder, vulcanizing agent, accelerator, processing aid are mixed and fed into a twin-screw extruder for shearing, Under the temperature condition of 80°C, vacuum kneading for 3 minutes to obtain the primary mixing material; raise the temperature of the above-mentioned primary mixing material to 90 °C, and vacuum kneading for 3 minutes to obtain th...

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Abstract

The invention is suitable for the technical field of materials, and provides a rubber sealing material and a preparation method thereof. The preparation method comprises the steps that: methyl acrylate and low-density polyethylene serve as base materials and are compounded with modified ceramic particle powder, modified sericite cloud powder and other raw materials, and then the rubber sealing material is prepared through the two-time vacuum mixing technology. The rubber sealing material has the advantages of favorable shore hardness, favorable tensile breaking strength, favorable tensile elongation at break, favorable tear strength, hot air aging resistance and lower permanent compression deformation, has favorable oil resistance, and can meet the use requirements of automobile sealing elements.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a rubber sealing material and a preparation method thereof. Background technique [0002] In order to prevent fluid or solid particles and other working media from leaking from adjacent joint surfaces, and to prevent external dust and foreign matter from invading and causing damage to equipment parts or facilities inside the equipment, it is usually necessary to carry out media, equipment or parts, etc. Sealing treatment, and sealing materials are often required for sealing treatment. Rubber product material is one of the most commonly used sealing materials. [0003] Acrylic rubber has the advantages of heat resistance, aging resistance, oil resistance, ozone resistance, UV resistance, etc., and its mechanical properties and processing properties are superior to fluororubber and silicone rubber, and its heat resistance, aging resistance and oil resistance are bett...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/08C08L23/06C08L91/06C08K13/08C08K9/06C08K9/04C08K11/00C08K3/34C08K3/26
CPCC08L33/08C08L2207/066C08K2003/265C08L23/06C08L91/06C08K13/08C08K9/06C08K9/04C08K3/346C08K11/005C08K3/34C08K3/26
Inventor 许婷
Owner SHENZHEN LOTUT INNOVATION DESIGN CO LTD
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