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Preparation method of praseodymium-based multi-ligand thiofide

A rubber vulcanization and multi-ligand technology, which is applied in chemical instruments and methods, organic chemistry, and compounds containing elements of group 3/13 of the periodic table, can solve problems such as poor solubility, simplify the process, and improve dissolution Sexuality and consumption-saving effect

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 of praseodymium-based multi-ligand thiofide
  • Preparation method of praseodymium-based multi-ligand thiofide
  • Preparation method of praseodymium-based multi-ligand thiofide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The preparation method of accelerator:

[0044] 0.01molPrCl 3 Dissolve in absolute ethanol at 60°C, dissolve 0.02mol potassium ethyl xanthate in absolute ethanol solution at 60°C, and dissolve 0.01mol o-phenanthroline in absolute ethanol solution at 60°C. Fully mix the ethanol solution of potassium ethyl xanthate and the ethanol solution of phenanthroline to obtain a mixed solution. Then the above mixed solution was added dropwise to PrCl 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 green powder, the target product PrA 2 B 0 C 0 D. 1 .

Embodiment 2

[0046] The preparation method of accelerator:

[0047] 0.01molPrCl 3 Dissolve in absolute ethanol at 60°C, dissolve 0.0001mol potassium ethyl xanthate in absolute ethanol solution at 60°C, dissolve 0.02mol sodium diethyldithiocarbamate in absolute ethanol solution at 60°C In, 0.03mol methacrylic acid was dissolved in absolute ethanol solution at 60°C. Fully mix the ethanol solution of potassium ethyl xanthate, the ethanol solution of sodium diethyldithiocarbamate and the ethanol solution of methacrylic acid to obtain a mixed solution. Then the above mixed solution was added dropwise to PrCl 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 green powder, the target product PrA 0.01 B2 C 3 D. 0 .

Embodiment 3

[0049] The preparation method of accelerator:

[0050] 0.01molPrCl 3 Dissolve in absolute ethanol at 60°C, dissolve 0.01mol potassium ethyl xanthate in absolute ethanol solution at 60°C, dissolve 0.01mol sodium diethyldithiocarbamate in absolute ethanol solution at 60°C In, 0.015mol methacrylic acid was dissolved in 60°C absolute ethanol solution, and 0.005mol o-phenanthroline was dissolved in 60°C absolute ethanol solution. Fully mix the ethanol solution of potassium ethyl xanthate, the ethanol solution of sodium diethyldithiocarbamate, the ethanol solution of methacrylic acid and the ethanol solution of o-phenanthroline to obtain a mixed solution. Then the above mixed solution was added dropwise to PrCl 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 green powder, the target product PrA 1 B ...

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Abstract

The invention discloses a praseodymium-based multi-ligand thiofide and a preparation method thereof. During synthesis, the rare earth element praseodymium and four ligands are adopted, wherein the ligands (I and II) are promoter groups of favorable sulfidation promotion effects; the ligand III is phenanthroline which can form powerful complexation with the rare earth element; the ligand IV is palmitic acid which can improve the solubleness of the thiofide in a sizing material. The preparation method is simple, convenient and feasible; adoption of an inert gas for protection is avoided; the preparation process is mild in conditions; no harmful gas is generated. The praseodymium-based multi-ligand thiofide has favorable solubleness in rubber, is long in sulfidization scorch time, good in vulcanization curve flatness, nontoxic, odor-less and pollution-free, can replace the system which is frequently-used at present and adopt zinc oxide, stearic acid and a promoter, and is applied to high-performance tires and other rubber products.

Description

technical field [0001] The invention relates to a synthesis method of a praseodymium-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 ac...

Claims

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Application Information

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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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