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Rubber and preparation method thereof

A technology of rubber and ethylene propylene raw rubber, which is applied in the field of rubber and its preparation, can solve the problems of high cost and complicated preparation process, and achieve the effects of low cost, simple preparation process and good sealing performance

Active Publication Date: 2011-03-30
常熟市凯润新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of complex preparation process and high cost of rubber sealing strips in the prior art, the present invention proposes a kind of rubber, which can be used to make rubber sealing strips, and the rubber sealing strips made of this rubber have good sound insulation, Vibration damping and sealing performance, good mechanical properties, and its preparation process is simple and low cost

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0031]According to the present invention, also discloses a kind of preparation method of above-mentioned rubber, comprises:

[0032] a. Mixing a mixture containing raw EPDM rubber, polyethylene glycol, vulcanizing agent, softener and filler to obtain a masterbatch; wherein the polyethylene glycol has a flash point of 160-175°C;

[0033] b. extruding the masterbatch and vulcanizing by microwave to obtain the above rubber sealing strip.

[0034] As a preferred embodiment, the above mixture also contains active agents and accelerators. The content of each component in the mixture is as described above, and will not be repeated here.

[0035] The method of above-mentioned mixing is the method known in the art, as in internal mixer (Dalian Bingshan Rubber & Plastic Machinery Co., Ltd.), adjust the rotor speed to be 30-50rpm, the top bolt pressure is 4-7MPa, and the mixing time is 8 -10min, then the temperature was raised to 80°C and the warehouse was stopped to discharge to obtai...

Embodiment 1

[0044] This example is used to illustrate the rubber disclosed in the present invention and its preparation method.

[0045] Based on the weight of EPDM raw rubber, 100 parts by weight of EPDM raw rubber [Keltan 4903, produced by DSM in the Netherlands, with a weight average molecular weight of 300,000 and a Mooney viscosity (125°C 1+4) of 30] , 3 parts by weight of sulfur, 40 parts by weight of paraffin oil, 80 parts by weight of carbon black and 4 parts by weight of polyethylene glycol (produced by U.S. Dow Company, the flash point is 173 ℃, the weight average molecular weight is 210, and the viscosity is 24pa.s, The hydroxyl value is 530mg KOH / g) into the internal mixer (Dalian Bingshan Rubber and Plastic Machinery Co., Ltd.), adjust the rotor speed to 30rpm, the upper bolt pressure to 5MPa, the mixing time to 8min, and then heat up to 80°C to stop the warehouse Discharge, obtain masterbatch A1.

[0046] The masterbatch A1 was placed in a composite extruder (manufactured b...

Embodiment 2

[0048] This example is used to illustrate the rubber disclosed in the present invention and its preparation method.

[0049] Based on the weight of EPDM raw rubber, 100 parts by weight of EPDM raw rubber [Keltan 4903, produced by DSM in the Netherlands, with a weight average molecular weight of 300,000 and a Mooney viscosity (125°C 1+4) of 30] , 70 parts by weight of paraffin oil, 140 parts by weight of graphite and 9 parts by weight of polyethylene glycol (produced by U.S. Dow Company, the flash point is 168 ℃, the weight average molecular weight is 200, the viscosity is 21pa.s, and the hydroxyl value is 550mg KOH / g) Add it to the internal mixer (Dalian Bingshan Rubber & Plastic Machinery Co., Ltd.), adjust the rotor speed to 30rpm, the upper bolt pressure to 5MPa, and the mixing time to 8min, then raise the temperature to 80°C and stop the warehouse to discharge the material to obtain mixing glue.

[0050] Place the rubber mixture for 24h. Then, the mixed rubber and 2 par...

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PUM

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Abstract

The invention relates to rubber and a preparation method thereof. The rubber comprises ethylene-propylene-eiene monomer raw rubber, softening agents and filling agents, wherein polyethylene glycol is also contained in the rubber, and the flash point of the polyethylene glycol is between 160 and 175 DEG C. Rubber sealing strips prepared by the rubber disclosed by the invention have good sound insulation, shock absorption and sealing performance and good mechanical property. Meanwhile, the sealing strips have low intensity and cater to the light weight trend of the sealing strips at present. Inaddition, the rubber has the advantages of simple preparation process and low cost.

Description

【Technical field】 [0001] The invention relates to a rubber and a preparation method thereof. 【Background technique】 [0002] With the increasing development and popularity of automobiles, automobile-related components have also been greatly developed. As the main component that isolates the compartment from the outside world, the role of automotive sealing strips is becoming more and more significant. Generally, the sealing strip is required to have good sound insulation, dustproof, vibration reduction and sealing performance. [0003] In the prior art, automobile sealing strips are generally made of ethylene propylene diene monomer (EPDM), which has excellent weather resistance and excellent processing performance. Good performance, excellent mechanical properties. However, due to the compact structure of the EPDM sealing strip, it is usually also a compact rubber sealing strip, and the sound insulation and vibration reduction effects of the compact rubber sealing strip ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L71/08C08J3/28C08J3/24
Inventor 朱潇彬王露
Owner 常熟市凯润新材料科技有限公司
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