Vulcanized foam rubber and preparation method thereof

A technology of foamed rubber and vulcanizing agent, applied in the field of rubber, which can solve problems such as difficult control and complicated process, and achieve the effect of moderate strength, uniform cell structure and good reproducibility

Active Publication Date: 2019-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a kind of vulcanized foamed rubber and its preparation method in order to overcome the problems of complex process and difficult control in the method of foaming vulcanized rubber prepared in the prior art

Method used

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  • Vulcanized foam rubber and preparation method thereof
  • Vulcanized foam rubber and preparation method thereof
  • Vulcanized foam rubber and preparation method thereof

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preparation example Construction

[0019] The invention provides a kind of preparation method of vulcanized foam rubber, and this preparation method comprises:

[0020] (1) Carrying out one-stage mixing of component A containing rubber matrix and vulcanization activator to obtain one-stage rubber compound;

[0021] (2) Carrying out two-stage mixing of the one-stage rubber compound with component B containing a vulcanizing agent, a vulcanization accelerator and a foaming agent, to obtain a two-stage rubber compound;

[0022] (3) Vulcanize the second-stage rubber compound;

[0023] Wherein, the vulcanization includes three stages carried out in sequence: the conditions of the first stage vulcanization include: the vulcanization temperature is 100-170°C, the vulcanization pressure is 10-20MPa, and the vulcanization time is 2-20min; the second stage vulcanization Keep the pressure of the first stage of vulcanization constant, the temperature of the second stage of vulcanization is higher than the temperature of th...

Embodiment approach

[0055] According to a preferred embodiment of the present invention, the preparation method of described vulcanized rubber comprises:

[0056] (1) Set the initial temperature of the internal mixer to 60-80°C and the rotational speed to 50-80 rpm, put the rubber matrix into the internal mixer for mastication for 0.5-1min, and then put in reinforcing agent, anti-aging agent, plasticizer Mixing agent and vulcanization activator for 3-5 minutes, deglue and stop for cooling for more than 4 hours to obtain a masterbatch;

[0057] (2) Set the initial temperature of the internal mixer to 50-60°C, and the speed to 50-80 rpm, and add a section of masterbatch, vulcanizing agent, vulcanization accelerator, foaming agent and foaming aid in order for mixing Mixing, the mixing time is 3-4min, when the second-stage mixing is completed, the glue can be removed;

[0058] (3) Pass the rubber compound obtained in step (2) once on the open mill with a roll distance of 0.2-0.8mm and a roll tempera...

Embodiment 1

[0082] The formulations of the components involved in the method of this embodiment are shown in Table 2 (wherein the numerical values ​​are parts by weight relative to 100 parts by weight of the rubber matrix). The preparation method of the vulcanized foam rubber S1 of the present embodiment is specifically as follows:

[0083] The first stage of mixing:

[0084] Set the initial temperature of the internal mixer to 70°C, and the rotor speed to 70r / min, add styrene-butadiene rubber to the internal mixer for mastication for 0.5min, and then put in carbon black, light calcium carbonate, stearic acid, zinc oxide, anti-aging agent and The plasticizer continued to mix for 3 minutes, deglue, and parked for 4 hours to obtain a section of masterbatch.

[0085] The second stage of mixing:

[0086] Set the initial temperature of the internal mixer to 50°C, and the rotor speed to 60r / min. Add a section of masterbatch, sulfur, accelerator, foaming agent and foaming aid into the internal...

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Abstract

The invention relates to the field of rubber, and discloses vulcanized foam rubber and a preparation method thereof. The method comprises the following steps that (1) primary mixing is conducted on acomponent A containing a rubber base and a vulcanization activator; (2) secondary mixing is conducted on the primary mixed rubber and a component B containing a vulcanizing agent, a vulcanization accelerator and a foaming agent; (3) vulcanization is conducted on the secondary mixed rubber, wherein the vulcanization comprises three stages in sequence, the temperature of first stage vulcanization is100-170 DEG C, vulcanization pressure is 10-20MPa, and vulcanization time is 2-20min; and the second stage vulcanization is conducted under the condition that pressure of the first stage vulcanization is not changed, temperature of the second stage vulcanization is higher than the temperature of the first stage vulcanization, vulcanization time of the second stage vulcanization is shorter than that of the first stage vulcanization, the third stage vulcanization is conducted under the condition that the temperature of the second stage vulcanization is not changed, the pressure of the third stage vulcanization is lower than that of the second stage vulcanization, and the time of the third stage vulcanization is longer than the time of the second stage vulcanization. The vulcanized foam rubber prepared by the method is low in density and uniform in foam structure.

Description

technical field [0001] The invention relates to the field of rubber, in particular to a method for preparing vulcanized foamed rubber and the vulcanized foamed rubber prepared by the method. Background technique [0002] Rubber foam material, also known as rubber sponge, microporous rubber or foam rubber, consists of a continuous solid phase (matrix gel) that constitutes the material itself and a fluid phase that forms (pores). According to whether the pores are connected, it can be divided into open-cell foam materials, closed-cell foam materials and mixed-cell foam materials. By appropriately increasing the cell volume of foamed rubber, rubber resources can be saved, and the characteristics of high compression rate and softness that general vulcanized rubber does not have can be obtained, and the function of rubber can be maximized. Rubber foam material is a high-performance ratio material. Because of its excellent physical and mechanical properties and low cost, it has b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C35/02B29B7/00C08L9/00C08L23/16C08L9/06C08L23/22C08L9/02C08L27/06C08J9/04
Inventor 郑方远解希铭姜科乔勋昌段海东孙攀
Owner CHINA PETROLEUM & CHEM CORP
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