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Magnesium oxide and zinc oxide blended vulcanizing agent for neoprene vulcanization and preparation method thereof

A chloroprene rubber and magnesium oxide technology, applied in the field of vulcanizing agent for chloroprene rubber vulcanization, can solve the problems of reducing the influence of rubber scorch performance, increasing the risk of rubber scorching, reducing activity, etc., so as to improve dispersibility and reduce coke The effect of burning danger and high vulcanization efficiency

Active Publication Date: 2014-11-26
河北镁神科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, active zinc oxide is not easy to disperse in chloroprene rubber, which increases the risk of glue burning; active magnesium oxide is easy to be affected by moisture and CO in the air. 2 Reaction reduces the activity and reduces the impact on the scorch performance of the compound

Method used

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  • Magnesium oxide and zinc oxide blended vulcanizing agent for neoprene vulcanization and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment relates to a preparation method of a magnesium oxide zinc oxide compound vulcanizing agent for chloroprene rubber vulcanization, the method comprising the following steps:

[0033] a. Take active zinc oxide and active magnesium oxide and mix, and mark it as substance A; pour the dispersant into 30ml of absolute ethanol solution and stir, and mark it as substance B after completely dissolving;

[0034] b. Put substance A in a high-shear emulsifier, and disperse it evenly at a speed of 2000-3000r / min, so that zinc oxide adheres to the surface of magnesium oxide; evenly spray substance B on the magnesium oxide zinc oxide in a state of high-speed stirring and mixing In the solid powder, the dispersant can be uniformly coated on the surface of the solid powder to form a coating film, and dispersed for 10-30 minutes to obtain a composite of magnesium oxide and zinc oxide;

[0035] c. Put the compound system obtained in step b in a constant temperature stirrer,...

Embodiment 2

[0037] Each of the following examples relates to the magnesium oxide zinc oxide compound vulcanizing agent used for chloroprene rubber vulcanization, which all adopts the preparation method of Example 1, and the difference lies in the consumption of each raw material composition, as shown in the following table:

[0038]

[0039]The compound vulcanizing agent obtained in the above examples was used to vulcanize neoprene rubber, and the performance evaluation of the vulcanized neoprene rubber was carried out. The Mooney scorch time was measured by a Mooney viscometer, and the tensile strength was tested according to the national standard GB / T528-1998. The results are shown in the table below.

[0040]

[0041] The chloroprene rubber is vulcanized with the superior product of the traditional powder vulcanizing agent, and the obtained chloroprene rubber has a Mooney scorch time of 30-60MSt 5 / min, the tensile strength is ≥24.0MPa. The results of each embodiment shown in th...

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Abstract

The invention relates to a magnesium oxide and zinc oxide blended vulcanizing agent for neoprene vulcanization and a preparation method thereof. The vulcanizing agent is prepared from the following components, by weight, 80.0%-90.0% of a mixture of active magnesium oxide and active zinc oxide and 10.0%-20.0% of a dispersant, wherein the weight ratio of active magnesium oxide to active zinc oxide is 1:0.2-3.0. The preparation method comprises the following steps: a, mixing active magnesium oxide and active zinc oxide to obtain a substance A, and dissolving the dispersant in anhydrous ethanol to obtain a substance B; b, carrying out surface-coating modification on the substance A with the substance B to obtain a blend; and c, heating and stirring the blend to obtain an ointment-like or sticky magnesium oxide and zinc oxide blended vulcanizing agent. The vulcanizing agent provided by the invention has the following advantages: the problem that a traditional powdery vulcanizing agent is not uniformly dispersed and activity of magnesium oxide is easy to fail when the powder is added into neoprene is solved; dispersibility of zinc oxide and activity permanence of magnesium oxide are enhanced; and scorching dangerousness of a rubber compound with high mooney viscosity is reduced.

Description

technical field [0001] The invention relates to a vulcanizing agent for chloroprene rubber vulcanization, in particular to a magnesium oxide zinc oxide compound vulcanizing agent, and at the same time, the invention also relates to a magnesium oxide zinc oxide compound vulcanization agent for neoprene vulcanization The preparation method of the agent. Background technique [0002] Neoprene is one of the main varieties of synthetic rubber. As a general-purpose special rubber, it has excellent properties such as heat resistance, flame resistance, oil resistance, and chemical corrosion resistance, and occupies an important position in synthetic rubber. According to the different molecular weight regulators used in the manufacturing process, chloroprene rubber can be divided into sulfur-regulated, non-sulfur-regulated and mixed-regulated types, of which non-sulfur-regulated types are the main varieties in the world. According to the crystallization speed or degree, chloroprene ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L11/00C08K9/10C08K3/22
Inventor 胡永琪李飞龙孙孟勇刘润静郑晓倩段晓宇崔继超刘亚青崔蕊张丽喆
Owner 河北镁神科技股份有限公司
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