A kind of preparation method of ionic rubber crosslinking agent

A cross-linking agent and ionic technology, applied in the field of cross-linked networks, can solve the problems of difficult recycling, environmental pollution, resource waste, etc., and achieve the effect of simple process, convenient recycling and biodegradation, and low cost

Active Publication Date: 2022-07-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its irreversibility, it is difficult to recycle and drop rubber products after they are discarded, resulting in environmental pollution and waste of resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] A preparation method of an ionic rubber crosslinking agent, which adopts zinc methacrylate (ZDMA) and bis-[γ-(triethoxysilyl)propyl]tetrasulfide (Si-69) to prepare the ionic crosslinking agent , including the following steps:

[0017] 1) Mix 0.25-20 g ZDMA with 7.5-600 mL N-methyl-2-pyrrolidone (NMP), and dissolve uniformly with the aid of an ultrasonic cleaner to obtain a solution;

[0018] 2) Add 0.5-5 g formic acid, 0.25-20 g hydrogen peroxide with a concentration of 35% and 0.25-20 mL Si-69 to the solution obtained in step 1) respectively, and react at 90 °C for 12 h to obtain a reaction solution;

[0019] 3) The reaction solution obtained in step 2) was centrifuged at 3500 rpm, and the precipitate was repeatedly washed with 95% ethanol for 5 times, and then placed in an oven at 85°C for 12 hours to obtain an ionic crosslinking agent.

Embodiment 1

[0021] 1) Mix 8g ZDMA with 300mL N-methyl-2-pyrrolidone (NMP), and dissolve it uniformly with the aid of an ultrasonic cleaner;

[0022] 2) Add 1.97g formic acid, 14.48g hydrogen peroxide (35%) and 8mL Si-69 to the solution obtained in step 1) respectively, and react at 90 °C for 12 h;

[0023] 3) The reaction solution obtained in step 2) was centrifuged at 3500 rpm, and the lower layer of the precipitate was repeatedly washed with ethanol (95%) for 5 times, and then placed in an 85°C oven to dry for 12 hours to obtain an ionic crosslinking agent.

[0024] The mass of the ionic crosslinking agent prepared by Example 1 was 4.2 g, and the yield was 52.5%.

Embodiment 2

[0026] (1) Mix 10 g of ZDMA with 300 mL of N-methyl-2-pyrrolidone (NMP), and dissolve it uniformly with the aid of an ultrasonic cleaner;

[0027] (2) 1.97 g of formic acid, 14.48 g of hydrogen peroxide (35%) and 10 mL of Si-69 were added to the solution obtained in step (1) respectively, and the reaction was carried out at 90 °C for 12 h;

[0028] (3) The reaction solution obtained in step (2) was centrifuged at 3500 rpm, and the lower layer of the precipitate was repeatedly washed with ethanol (95%) for 5 times, and then placed in an oven at 85 °C for 12 h to obtain an ionic crosslinking agent.

[0029] The quality of the ionic crosslinking agent prepared by embodiment two is 5.2 g, and the productive rate is 52.0%

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Abstract

A preparation method of an ionic rubber crosslinking agent, comprising the following steps: 1) mixing ZDMA with N-methyl-2-pyrrolidone (NMP), and dissolving it uniformly with the aid of an ultrasonic cleaner to obtain a solution; 2) re-mixing Formic acid, hydrogen peroxide with a concentration of 35% and Si-69 were respectively added to the solution obtained in step 1), and the reaction solution was obtained by reaction; 3) the reaction solution obtained in step 2) was centrifuged, and the precipitate was repeatedly washed with ethanol and put into Oven drying to obtain an ionic crosslinking agent, which has the characteristics of simple process, low cost, convenient recovery and biodegradation.

Description

technical field [0001] The invention discloses a preparation method of an ionic rubber cross-linking agent, in particular to a cross-linking network capable of constructing ionic bonds during the rubber cross-linking process. Background technique [0002] Rubber is a common thermoset material, with global production reaching 160 million tons in 2017. It undergoes a cross-linking reaction with the vulcanizing agent at high temperature, and cross-links the linear rubber molecules into a three-dimensional network structure, which endows the material with excellent physical properties. In people's daily life, rubber products can be seen everywhere, such as: rubber tires, sealing rings, gloves, etc. While contributing to people's lives, they are also difficult to recycle and biodegrade, causing huge environmental problems. and waste of resources. According to the statistics of the World Health Organization, the global reserve of used tires has reached 3 billion, and this number...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/18C08K5/548C08L21/00
CPCC07F7/1892C08K5/0025C08K5/548C08L21/00
Inventor 邵亮许冉韦晗丹马忠雷邓富泉张梦辉黎星王博煜宋媛
Owner SHAANXI UNIV OF SCI & TECH
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