Rubber material for sealing rubber strip

A technology of rubber material and sealing strip, applied in the field of sealing strip, can solve the problems of poor processing performance, difficult to add operating oil, etc., and achieve the effect of good anti-aging performance, wide protection range, and avoiding unpleasant smell of products

Active Publication Date: 2021-02-19
中国化工集团曙光橡胶工业研究设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a large amount of operating oil needs to be added to the formula of EPDM rubber sealing strips to adjust the hardness, but it is difficult to add operating oil during processing, and there is a problem of poor processing performance.

Method used

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  • Rubber material for sealing rubber strip
  • Rubber material for sealing rubber strip

Examples

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preparation example Construction

[0045] The present invention also provides a preparation method of the rubber material for the sealing strip described in the above technical solution, comprising the following steps:

[0046] mixing oil-extended EPDM rubber, zinc oxide, stearic acid, anti-aging agent, protective wax, active agent, reinforcing filler and paraffin oil for the first mixing to obtain a masterbatch;

[0047] The masterbatch and the vulcanizing agent are mixed for the second kneading to obtain the rubber material for the sealing strip.

[0048] In the present invention, when the raw material of the rubber material for the sealing strip contains an accelerator, the accelerator is preferably added during the second kneading.

[0049] In the present invention, the first kneading and the second kneading are preferably performed in an internal mixer. In the present invention, there is no special limitation on the specific parameters of the first mixing and the second mixing, and methods known to those ...

Embodiment 1

[0054] A kind of rubber material for sealing strips in this embodiment, its raw material comprises the following components by weight:

[0055] 200 parts of EPDM5469C, 5 parts of zinc oxide, 1 part of stearic acid, 1.5 parts of antioxidant 6PPD, 2 parts of protective wax Okerin1900, 3 parts of active agent PEG-4000, 60 parts of N550 carbon black, 40 parts of N774 carbon black, 20 parts of clay , 60 parts of paraffin oil, 1 part of sulfur, 1 part of accelerator TMTD, and 0.5 parts of accelerator M.

[0056] The preparation method adopts the two-stage mixing method of GK250 internal mixer, including the following steps:

[0057] Step 1, masterbatch mixing: set the mixer speed to 50rpm, add oil-filled EPDM rubber into the mixer, and add zinc oxide, stearic acid, protective wax Okerin 1900, and anti-aging agent 6PPD after mixing for 20 seconds , active agent PEG-4000 and pottery clay, after mixing for 50s, add N550 carbon black and N774 carbon black, add paraffin oil after mixing...

Embodiment 2

[0060] A kind of rubber material for sealing strips in this embodiment, its raw material comprises the following components by weight:

[0061] 70 parts of EPDM3072EM, 100 parts of EPDM5469C, 5 parts of zinc oxide, 1 part of stearic acid, 1.5 parts of antioxidant RD, 1.5 parts of antioxidant 6PPD, 1 part of protective wax Okerin 1900, 2 parts of active agent PEG-4000, 50 parts of N550 carbon black parts, 20 parts of N774 carbon black, 30 parts of clay, 60 parts of paraffin oil, 1 part of sulfur, 1.2 parts of accelerator TMTD, 0.5 parts of accelerator M and 1 part of vulcanizing agent BIBP.

[0062] The preparation method is the same as in Example 1.

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Abstract

The invention provides a rubber material for a sealing rubber strip, and belongs to the technical field of sealing rubber strips. The invention provides the rubber material for the sealing rubber strip. The rubber material comprises the following components in parts by weight: 140-200 parts of oil-extended ethylene propylene diene monomer, 1-10 parts of zinc oxide, 1-5 parts of stearic acid, 1-5 parts of an anti-aging agent, 1-5 parts of protective wax, 2-10 parts of an active agent, 60-200 parts of a reinforcing filler, 40-100 parts of paraffin oil and 2-5 parts of a vulcanizing agent. The oil-extended ethylene propylene diene monomer is used, high filling is achieved under the condition that a small amount of operating oil is added, the processability is good, and the using amount of theoperating oil and the hardness of the rubber material for the sealing rubber strip are both considered.

Description

technical field [0001] The invention relates to the technical field of sealing rubber strips, in particular to a rubber material for sealing rubber strips. Background technique [0002] EPDM rubber has excellent weather resistance, heat resistance and chemical stability, and is widely used as a sealing material for machinery and equipment. Therefore, most of the seals of locomotive doors and windows, building doors and windows, and mechanical equipment are sealed with EPDM rubber seals. . Sealant strips require suitable hardness, good elasticity, low compression deformation resistance, excellent heat resistance and ozone aging resistance. In addition, the rubber strips are required to have good ductility, easy to fit and install, and strong sealing performance. At present, a large amount of operating oil needs to be added to the formula of EPDM rubber sealing strips to adjust the hardness, but it is difficult to add operating oil during processing, and there is a problem of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L91/06C08L71/02C08K13/02C08K3/22C08K5/09C08K3/06C08K3/04C08K5/14
CPCC08L23/16C08K2003/2296C08L2201/08C08L2205/035C08L2205/025C08L91/06C08L71/02C08K13/02C08K3/22C08K5/09C08K3/06C08K3/04C08K5/14
Inventor 刘亚楠易荣周胜潘荣辉李善荣
Owner 中国化工集团曙光橡胶工业研究设计院有限公司
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