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Sponge rubber composition and preparation method thereof

A composition and technology of EPDM rubber, applied in the field of sponge rubber composition and its preparation, can solve the problems of large amount of accelerator, slow vulcanization speed of sponge rubber, low production efficiency, etc., to solve corrosion problems, extrusion Improve production efficiency and reduce consumption

Inactive Publication Date: 2009-12-23
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of slow vulcanization speed of sponge rubber in the prior art, low production efficiency and large amount of accelerator

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] Among the present invention, the preparation method of described composition comprises: EPDM rubber, polyether polyol of the present invention and various additives are added to 75 liters internal mixers (Sichuan Yaxi Rubber and Plastic Machinery Co., Ltd., model Carry out one section of mixing in XSN-75 / 30B), park after pressing tablet, cooling; XK-550) for two-stage kneading, thin-pass three times for tableting, cooling, and parking. The temperature of the first-stage mixing can be 100-150°C, the time is about 10-20 minutes, and the parking time is 24 hours; the temperature of the second-stage mixing can be 60-70°C, and the mixing time can be 5-50°C. 10 minutes; Described internal mixer and open mixer all can be the various internal mixers and open mixer of routine use in this area. The methods of one-stage mixing and two-stage mixing are known to those skilled in the art.

[0042] The EPDM compound after two-stage mixing is a sponge rubber blank, and the sea surfac...

Embodiment 1

[0045] This example is used to prove that the activation ability of organotellurium in rubber composition is stronger than that of traditional zinc oxide.

[0046] The rubber composition is compounded according to the following proportions, mixed and parked to prepare a masterbatch.

[0047] Based on 100 parts by weight of EPDM rubber, the ratio is as follows:

[0048] EPDM4903 (Netherlands DSM) 100 parts by weight

[0049] Carbon black N550 (Shanghai Cabot) 100 parts by weight,

[0050] 60 parts by weight of paraffin oil 2280 (U.S. Sun brand),

[0051] Foaming agent OBSH (Japan Yonghe Chemical) 2.5 parts by weight

[0052] Active agent ZnO (domestic 99.7%) 5 parts by weight

[0053] Stearic acid 1.0 parts by weight

[0054] Polar additive PEG4000 2 parts by weight

[0055] Sulfur 1.2 parts by weight

[0056] Calcium oxide 5.0 parts by weight.

[0057] The above materials were kneaded on the kneader for one stage and one stage for 10 minutes at a temperature of 150° C. t...

Embodiment 2

[0061] The difference from Example 1 is that the organic tellurium is added as n-butyl tellurium to obtain sponge rubber A2.

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PUM

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Abstract

The invention relates to a sponge rubber composition and a preparation method thereof. The sponge rubber composition is prepared from EPDM, a filling agent, an active agent, a plasticizing agent, a polarity addition agent, a vulcanizing agent, a promoting agent, a foaming agent and a moisture absorbing agent, wherein the active agent comprises zinc oxide, stearic acid and organic tellurium; and the organic tellurium is at least one of dipropyl tellurium, dibutyl tellurium, normal-butyl tellurium and methyl allyl tellurium. A sponge rubber prepared by the sponge rubber composition and the preparation method thereof can improve the production efficiency, and can solve the problem of corrosiveness of the sponge rubber at the same time.

Description

Technical field: [0001] The invention relates to a sponge rubber composition and a preparation method thereof. Background technique [0002] Sponge rubber is mainly used in the manufacture of automobile windshields, automobile sealing strips, sealing gaskets for construction projects, heat insulation materials for weak current components, vibration damping materials and other products. [0003] Automobile sealing strips are generally composed of solid materials and sponge materials, which have high requirements for weather resistance and physical and mechanical properties of materials, and the production process requires good rubber processing performance. Ethylenepropylene diene rubber (EPDM) is widely used in the preparation of automotive weather strips because of its excellent weather resistance and excellent processability. However, the present sponge rubber has technical defects such as slow vulcanization speed, low production efficiency and large amount of accelerator...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08K13/02C08K3/22C08K5/09C08K5/00C08J9/10
Inventor 王露
Owner BYD CO LTD
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