Preparation method for samarium-based multi-ligand vulcanization accelerator

A technology of vulcanization accelerator and ligand, which is applied in the field of synthesis of samarium-based multi-ligand vulcanization accelerator, can solve problems such as poor solubility, and achieve the effects of simplifying process, improving safety, and improving the effect of promotion.

Active Publication Date: 2014-05-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of accelerator effectively improves the disadvantage of poor solubility in rubber of traditional vulcanization accelerator systems, simplifies the feeding process, and is clean and pollution-free

Method used

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  • Preparation method for samarium-based multi-ligand vulcanization accelerator
  • Preparation method for samarium-based multi-ligand vulcanization accelerator
  • Preparation method for samarium-based multi-ligand vulcanization accelerator

Examples

Experimental program
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Effect test

Embodiment 1

[0043] The preparation method of accelerator:

[0044] 0.01molSmCl 3 Dissolve in absolute ethanol at 60°C, dissolve 0.02mol thiourea in absolute ethanol at 60°C, and dissolve 0.01mol dopamine in absolute ethanol at 60°C. Thoroughly mix the ethanol solution of thiourea and the ethanol solution of dopamine evenly to obtain a mixed solution. Then the above mixed solution was added dropwise to SmCl 3 in anhydrous ethanol solution, stirred in an oil bath at 80°C for 6h and filtered, and the precipitate was washed with anhydrous ethanol, and placed in CaCl 2 Dry in a desiccant desiccator at 20°C to a constant mass to obtain a white powder, the target product SmA 2 B 0 C 0 D. 1 .

Embodiment 2

[0046] The preparation method of accelerator:

[0047] 0.01molSmCl 3 Dissolve in absolute ethanol at 60°C, dissolve 0.0001mol thiourea in absolute ethanol at 60°C, dissolve 0.02mol potassium ethyl xanthate in absolute ethanol at 60°C, and dissolve 0.03mol α- Methacrylic acid was dissolved in absolute ethanol solution at 60°C. Fully mix the ethanol solution of thiourea, the ethanol solution of potassium ethyl xanthate and the ethanol solution of α-methacrylic acid to obtain a mixed solution. Then the above mixed solution was added dropwise to SmCl 3 in anhydrous ethanol solution, stirred in an oil bath at 80°C for 6h and filtered, and the precipitate was washed with anhydrous ethanol, and placed in CaCl 2 Dry in a desiccant desiccator at 20°C to constant mass to obtain a light yellow powder, the target product SmA 0.01 B 2 C 3 D. 0 .

Embodiment 3

[0049] The preparation method of accelerator:

[0050] 0.01molSmCl 3 Dissolve in absolute ethanol at 60°C, dissolve 0.01mol thiourea in absolute ethanol at 60°C, dissolve 0.01mol potassium ethyl xanthate in absolute ethanol at 60°C, and dissolve 0.015mol α- Dissolve methacrylic acid in absolute ethanol solution at 60°C, and dissolve 0.005mol dopamine in absolute ethanol solution at 60°C. The ethanol solution of thiourea, the ethanol solution of potassium ethyl xanthate, the ethanol solution of α-methacrylic acid and the ethanol solution of dopamine are thoroughly mixed to obtain a mixed solution. Then the above mixed solution was added dropwise to SmCl 3 in anhydrous ethanol solution, stirred in an oil bath at 80°C for 6h and filtered, and the precipitate was washed with anhydrous ethanol, and placed in CaCl 2 Dry in a desiccant desiccator at 20°C to constant mass to obtain a light yellow powder, the target product SmA 1 B 1 C 1.5 D. 0.5 .

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Abstract

The invention discloses a samarium-based multi-ligand vulcanization accelerator and a preparation method thereof. The adopted rare-earth elements in the synthesis is samarium element; the vulcanization accelerator comprises 4 ligands, wherein the ligand 1 and 2 are accelerant groups with good vulcanization accelerating effects, the ligand 3 is alpha-methacrylic acid capable of improving the solubility of the accelerant in rubber, and the ligand 4 is dopamine capable of forming strong coordination with the rare-earth element. The preparation method is simple, convenient and feasible, protection of inert gas is not needed, the conditions for the preparation process are mild, and no harmful gas is generated. The multi-ligand rare-earth vulcanization accelerator is high in solubility in rubber, can maintain a long vulcanization scorch time, is nontoxic and odorless, and generates no pollution; the flatness of the vulcanization curve is high. The vulcanization accelerator can replace the current commonly-used combined system of zinc oxide, stearic acid and accelerator, and can be applied to high-performance tires and other rubber products.

Description

technical field [0001] The invention relates to a synthesis method of a samarium-based multi-ligand vulcanization accelerator and research on its vulcanization acceleration effect. This accelerator does not need zinc oxide and stearic acid as an activator, and has the advantages of saving the feeding process, clean and pollution-free, good vulcanization flatness, and easy to uniformly disperse in rubber. The rubber composite material prepared by using this accelerator has the advantages of Good performance uniformity. Background technique [0002] The vulcanization system of rubber is a complete vulcanization system composed of accelerators, activators, and vulcanizing agents. Among them, the accelerator is a chemical substance that can shorten the vulcanization time, lower the vulcanization temperature, reduce the amount of vulcanizing agent, and improve and improve the physical and mechanical properties and chemical stability of the vulcanized rubber. Just because accele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/00C07F5/00C08L9/06
Inventor 刘力杜一诗摆音娜胡水温世鹏
Owner BEIJING UNIV OF CHEM TECH
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