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Method for preparation of rubber vulcanization activator by seed deposition

A rubber vulcanization and activator technology, which is applied in the field of rubber vulcanization activator preparation, can solve problems affecting the quality stability of low-zinc activator, large component fluctuation, high production cost, etc., and achieve saving of zinc resources, low zinc content and low cost low effect

Active Publication Date: 2014-09-24
JIANGSU ATE DONGTAI NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Clay is formed by the blooming of silicate minerals. It exists in nature, and its composition fluctuates greatly, which will inevitably affect the quality stability of low-zinc active agents. The production process is to disperse clay in water, dry it, then disperse it in water, and dry it. Drying and other links, the process is cumbersome and the production cost is high

Method used

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  • Method for preparation of rubber vulcanization activator by seed deposition
  • Method for preparation of rubber vulcanization activator by seed deposition
  • Method for preparation of rubber vulcanization activator by seed deposition

Examples

Experimental program
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Effect test

Embodiment 1

[0025] At room temperature, dissolve 20g of benzoic acid in 131.5g of 5% sodium hydroxide solution in alkali, after the reaction is complete, slowly add 55.7g of 20% zinc chloride solution, and fully stir the reaction after adding the zinc chloride 20min, filter, wash, and evenly disperse the filter cake in 745.4g of 5% sodium hydroxide solution under stirring condition, slowly add 253.5g of 25% zinc chloride solution, control the reaction temperature at 20°C, wait for the zinc chloride to add After that, fully stir and react for 40 minutes, then filter, wash and dry, and the mass percentage of zinc oxide in the obtained rubber vulcanization activator is 60%.

[0026] The rubber formula used is: NR 100, stearic acid 2, N220 45, white carbon black 8, Si69 0.8, aromatic hydrocarbon oil 5, protective wax 2, 4010NA 1.5, sulfur 1.2, NOBS 1.6, active agent (variant: embodiment 1 Preparation of vulcanization activators and zinc oxide by indirect method) 4. On the double-roll mill, t...

Embodiment 2

[0028] At room temperature, dissolve 20g of stearic acid in 93.8g of 3% sodium hydroxide solution in alkali. After the reaction is complete, slowly add 11.2g of 35% calcium chloride solution, and stir fully after the addition of calcium chloride is complete. React for 15 minutes, filter, wash, and evenly disperse the filter cake in 140.5g of 10% sodium hydroxide solution under stirring conditions, slowly add 166g of 20% zinc nitrate solution, control the reaction temperature at 40°C, and wait until the zinc nitrate is added Fully stirred and reacted for 20 minutes, then filtered, washed and dried, the mass percentage of zinc oxide in the obtained rubber vulcanization activator was 40%.

[0029] The rubber formula used is: 1502SBR 60, 1712SBR 55, stearic acid 2, N339 57, silica 8, Si69 1, aromatic oil 3, protective wax 3, 4010NA 1.5, RX-80 4, sulfur 1.9, CZ 1.4, DM 0.3, active agent (variant: vulcanization active agent prepared in Example 2 and zinc oxide by indirect method) 4....

Embodiment 3

[0031]At room temperature, dissolve 20g of stearic acid in 96.4g of 5% sodium hydroxide solution in alkali. After the reaction is complete, slowly add 38.2g of 30% magnesium chloride solution. After adding magnesium chloride, fully stir the reaction for 40min, filter , wash, and evenly disperse the filter cake in 255.2g of 15% potassium hydroxide solution under stirring conditions, slowly add 155g of 30% zinc chloride solution, control the reaction temperature at 25°C, and fully Stirring and reacting for 35 minutes, then filtering, washing and drying, the mass percentage of zinc oxide in the obtained rubber vulcanization activator was 55%.

[0032] Table 1

[0033]

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Abstract

The invention relates to a method for preparation of a rubber vulcanization activator by seed deposition. The method includes: subjecting an organic acid to complete reaction dissolution in an alkaline solution, adding a precipitant to obtain an organic carboxylic acid metal salt crystal, carrying out filtering and washing, then taking the filter cake as a seed or center and dispersing it uniformly into the alkaline solution, then adding a soluble zinc salt solution dropwise, controlling the reaction conditions to make the obtained nano-zinc oxide completely gather on the surface of the organic carboxylic acid metal salt, thus finally obtaining the coated structure activator with the organic carboxylic acid metal salt as the core and the nano-zinc oxide as the shell. Specifically, the nano-zinc oxide accounts for 30%-80% by mass. The method employs easily available raw materials with moderate price, and is easy for industrialization. In addition, compared with traditional zinc oxide, the product has the characteristics of low zinc content, small proportion, good dispersibility, and high reaction activity.

Description

technical field [0001] The present invention relates to a new method for preparing rubber vulcanization active agent. The method can prepare a coated structural active agent with an organic carboxylic acid metal salt as a core and nanometer zinc oxide as a shell. Background technique [0002] Rubber vulcanization activator refers to a type of accelerator that can increase the activity of the accelerator after adding the rubber, reduce the amount of the accelerator, and shorten the vulcanization time to increase the crosslinking. Zinc oxide is used as a rubber vulcanization activator. Since the 1920s and 1930s, its dosage has gradually decreased from 20 parts to 10 parts, and it has basically stabilized at about 5 parts after World War II. Although zinc oxide plays a very important role in the rubber industry, the release of zinc during the production, use, and recycling of rubber products will have adverse effects on the environment, human health, and especially aquatic org...

Claims

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Application Information

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IPC IPC(8): C08K5/098C08K3/22C08L7/00C08L9/06
Inventor 方春平蒋丽其他发明人请求不公开姓名
Owner JIANGSU ATE DONGTAI NEW MATERIALS TECH