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Metallic ion crosslinking agent for high-temperature-resistant water-based paint and preparation method thereof

A metal ion, water-based coating technology, used in anti-corrosion coatings, fire-resistant coatings, chemical instruments and methods, etc., can solve the problem of poor compatibility between resin and curing agent, poor anti-corrosion performance of water-based coatings, and strong hydrophilicity on the surface of the coating. and other problems, to achieve the effect of convenient and easy control of reaction conditions, improved anti-corrosion performance, and simple and easy preparation method

Inactive Publication Date: 2017-06-20
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Waterborne anti-corrosion coatings generally have low crosslinking density and too strong hydrophilicity on the coating surface
The main reason is that the water-soluble resin itself has relatively high hydrophilicity, and the commonly used curing agent is a hydrophilic curing agent, so the surface of the obtained coating is too hydrophilic, and the cross-linking density is low, so that the anti-corrosion performance of the water-based coating Difference
At the same time, the compatibility parameters of the curing agent and the resin are very different, and the compatibility of the resin and the curing agent is not good when applied.
[0004] According to the shortcomings of water-based coatings, researchers have made a series of improvements, and a large number of improvements have been made to the curing agent of water-based coatings. However, the current research reports are only based on the original solvent-based coatings. As a result, compared with the early water-based coatings, the anti-corrosion performance has been improved to a certain extent, but there is still a certain gap between the performance and the solvent-based coatings.

Method used

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  • Metallic ion crosslinking agent for high-temperature-resistant water-based paint and preparation method thereof
  • Metallic ion crosslinking agent for high-temperature-resistant water-based paint and preparation method thereof
  • Metallic ion crosslinking agent for high-temperature-resistant water-based paint and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] A metal ion cross-linking agent for high temperature resistant water-based paint, the molecular structural formula of the metal ion cross-linking agent is as follows:

[0029]

[0030] Among them, the central ion is magnesium ion, and the chelating agent is diethanolamine.

[0031] A preparation method of a metal ion crosslinking agent for high temperature resistant waterborne coatings, the specific steps are as follows:

[0032] Step 1. Add 10g of glycerol to the three-necked flask equipped with a condenser tube, and preheat at 60-80°C for 0.5-2h, then put diethanolamine into the three-necked flask, adjust the pH to 6.5, at a speed of 1000r / min The mixture was stirred uniformly, and the reaction was refluxed for 1 h for preheating.

[0033] Step 2. Enter the protective gas N 2 , raise the temperature to 90°C, slowly add magnesium ions, stir evenly at a speed of 1000r / min, reflux for 1h, stop stirring, let stand for 1h, cool to room temperature and transfer to a be...

Embodiment 2

[0035] A metal ion cross-linking agent for high temperature resistant water-based paint, the molecular structural formula of the metal ion cross-linking agent is as follows:

[0036]

[0037] Among them, the central ion is magnesium ion, and the chelating agent is triethanolamine.

[0038] A preparation method of a metal ion crosslinking agent for high temperature resistant waterborne coatings, the specific steps are as follows:

[0039] Step 1. Add 20 g of glycerol to a three-necked flask equipped with a condenser tube, preheat at 60-80 °C for 2 hours, then put triethanolamine into the three-necked flask, adjust the pH to 6.5, and stir evenly at a speed of 3000r / min, Reflux reaction for 0.5h for preheating.

[0040] Step 2. Enter the protective gas N 2 , raise the temperature to 100°C, slowly add magnesium ions, stir evenly at a speed of 3000r / min, reflux for 3h, stop stirring, let stand for 5h, cool to room temperature and transfer to a beaker to obtain metal ion chelat...

Embodiment 3

[0042] A metal ion cross-linking agent for high temperature resistant water-based paint, the molecular structural formula of the metal ion cross-linking agent is as follows:

[0043]

[0044] Among them, the central ion is beryllium ion, and the chelating agent is triethanolamine.

[0045] A preparation method of a metal ion crosslinking agent for high temperature resistant waterborne coatings, the specific steps are as follows:

[0046] Step 1. Add 15g of glycerol to the three-necked flask equipped with a condenser tube, and preheat at 60-80°C for 0.5-2h, then put triethanolamine into the three-necked flask, adjust the pH to 7, and uniformly at a speed of 2000r / min Stir, reflux reaction 2h for preheating.

[0047] Step 2. Enter the protective gas N 2 , raise the temperature to 100°C, slowly add beryllium ions, stir evenly at a speed of 1500r / min, reflux for 2.5h, stop stirring, let stand for 4h, cool to room temperature and transfer to a beaker to obtain metal ion chelat...

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Abstract

The invention discloses a metal ion crosslinking agent for high-temperature-resistant water-based coatings and a preparation method thereof. The molecular structural formula of the metal ion crosslinking agent is as follows: Among them, the metal ion cross-linking agent is prepared from a central ion M and a chelating agent, the central ion M is a metal ion with an outer electron empty orbit, and the chelating agent is an amine compound with two or more hydroxyl groups. The metal ion crosslinking agent described in the present invention is mainly used in the field of water-based anticorrosion coatings. The metal ion crosslinking agent can significantly increase the crosslinking density of the coating and reduce the surface hydrophilicity, so it can significantly improve the corrosion resistance and corrosion resistance of the coating. Temperature resistance. The invention has wide and easily available raw materials, simple manufacturing process and excellent product performance, and is a new curing method of water-based paint.

Description

technical field [0001] The invention belongs to the field of novel compounds, and relates to a new water-based paint cross-linking agent and a synthesis method thereof, in particular to a metal ion cross-linking agent for high-temperature-resistant water-based paint and a preparation method thereof. Background technique [0002] Due to the enormous pressure of the environment, solvent-based coatings are gradually withdrawn from our sight. The development of substitutes for solvent-based coatings is the focus of current coatings development. Alternatives to solvent-based coatings are mainly powder coatings, light-curing coatings and water-based coatings. Among them, water-based paint is recognized as the most promising alternative. However, compared with solvent-based coatings, there are still many shortcomings in the performance of water-based coatings. Among them, in terms of anti-corrosion ability, the anti-corrosion ability of water-based coatings is far from the anti-...

Claims

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Application Information

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IPC IPC(8): C07F3/02C07F3/00C07F7/28C09D5/08C09D175/04C09D7/12
CPCC07F3/00C07F7/003C08K5/35C09D5/08C09D5/18C09D7/63C09D175/04
Inventor 高延敏左银泽陈亮李梦曾超
Owner JIANGSU UNIV OF SCI & TECH
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