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Styrene-butadiene vulcanized rubber and preparation method thereof

A technology for vulcanized rubber and styrene-butadiene rubber, which is applied in the field of modified styrene-butadiene vulcanized rubber, can solve the problems of decreased mechanical properties and poor rubber compatibility, and achieves the effects of improved heat aging resistance, easy implementation and simple process.

Active Publication Date: 2011-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there is also the problem that the compatibility of the two rubbers is not good, which leads to the decline of mechanical properties.

Method used

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  • Styrene-butadiene vulcanized rubber and preparation method thereof
  • Styrene-butadiene vulcanized rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In styrene-butadiene emulsion (Sinopec Shanghai Gaoqiao branch, DB-7723), after adding cross-linking aid trimethylolpropane triacrylate by 1% of styrene-butadiene emulsion dry glue weight, carry out radiation vulcanization, radiation dose is 3kGy, after spray drying, a fully vulcanized powdered styrene-butadiene rubber with an average particle size of 150nm and a gel content of 91% was obtained.

[0019] First, set the initial temperature of the internal mixer at 50±3°C, and the rotor speed at 80r / min, add the prepared fully vulcanized powdered styrene-butadiene rubber and styrene-butadiene rubber (China Petroleum Corporation Jilin Petrochemical Branch, SBR1500) to masticate rubber 0.5-2mins, then add the required additives, continue to mix the rubber for 5mins, the mixing temperature is 150-170°C, then unload the rubber; then add the accelerator and vulcanizing agent on the open mill for mixing, and then vulcanize. The specific formula is shown in Table 1, wherein the ...

Embodiment 2

[0023] In styrene-butadiene emulsion (produced by Sinopec Lanhua Branch, DB-50), after adding cross-linking aid trimethylolpropane triacrylate by 1% of styrene-butadiene emulsion dry glue weight, carry out radiation vulcanization, radiation dose is 5kGy, after spray drying, the average particle size is 100nm, and the gel content is 89.1% fully vulcanized powdered styrene-butadiene rubber.

[0024] First, set the initial temperature of the internal mixer at 50±3°C, and the rotor speed at 80r / min, add the prepared fully vulcanized powdered styrene-butadiene rubber and styrene-butadiene rubber (China Petroleum Corporation Jilin Petrochemical Branch, SBR1500) to masticate rubber 0.5-2mins, then add the required additives, continue to mix the rubber for 5mins, the mixing temperature is 150-170°C, then unload the rubber; then add the accelerator and vulcanizing agent on the open mill for mixing, and then vulcanize. The specific formula is shown in Table 1, wherein the fully vulcaniz...

Embodiment 3

[0028] Except that the grade of styrene-butadiene rubber is changed to SBR2535, all the other are the same as in Example 2. The specific formula is shown in Table 1, and the test results are shown in Table 1.

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Abstract

The invention provides styrene-butadiene vulcanized rubber and a preparation method thereof. The styrene-butadiene vulcanized rubber comprises the following blended components in parts by weight: 100 parts of styrene-butadiene rubber or carboxylated styrene-butadiene rubber and 2-15 parts of full-vulcanized powdered rubber, wherein the styrene-butadiene rubber is full-vulcanized powdered styrene-butadiene rubber or full-vulcanized powdered carboxyl styrene-butadiene rubber, and the average particle size of the full-vulcanized powdered rubber is 50-300nm. The styrene-butadiene vulcanized rubber provided by the invention maintains mechanical properties of the original styrene-butadiene rubber, and hot ageing resistance is obviously improved. The preparation method of the styrene-butadiene vulcanized rubber in the invention has simple process and is easy to implement, thus being applicable to the traditional rubber vulcanization process.

Description

technical field [0001] The invention relates to a modified styrene-butadiene vulcanized rubber. Specifically, it relates to a styrene-butadiene vulcanized rubber composition added with fully vulcanized powder rubber and a preparation method thereof. technical background [0002] Styrene-butadiene rubber belongs to the diene rubber with a large number of double bonds in the molecule. It is prone to degradation, depolymerization, crosslinking, cyclization, and isomerization in the molecule under the action of high-temperature thermal oxygen. These reactions are the reasons for the rapid performance of rubber at high temperatures. main cause of deterioration. [0003] Anti-aging agents are added to the rubber to delay the thermal oxidation process. In order to improve the heat resistance of rubber, the prior art adopts the method of increasing the amount of anti-aging agent, as described in the "Rubber Product Production Manual". However, the maximum amount of anti-aging age...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/06C08L13/00C08J3/24
Inventor 张晓红李花婷高建明王清才周志峰宋志海赖金梅蔡传伦张红彬王亚黄源
Owner CHINA PETROLEUM & CHEM CORP
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