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Epoxy-modified water-based alkyd resin and water-based alkyd amino stoving varnish and preparation method of epoxy-modified water-based alkyd resin and water-based alkyd amino stoving varnish.

A water-based alkyd resin and epoxy modification technology, applied in coatings, polyester coatings, etc., can solve the problems of poor outdoor weather resistance, low water-based alkyd hardness, poor water resistance, etc., and achieve large formula adjustability , strong alkali resistance, solve the effect of low hardness

Inactive Publication Date: 2014-10-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] On the basis of previous studies, the present invention provides an epoxy-modified water-based alkyd amino baking varnish and its preparation method, which solves the problems of low hardness, poor adhesion, poor water resistance, and poor outdoor weather resistance of water-based alkyds. Good and other questions

Method used

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  • Epoxy-modified water-based alkyd resin and water-based alkyd amino stoving varnish and preparation method of epoxy-modified water-based alkyd resin and water-based alkyd amino stoving varnish.
  • Epoxy-modified water-based alkyd resin and water-based alkyd amino stoving varnish and preparation method of epoxy-modified water-based alkyd resin and water-based alkyd amino stoving varnish.
  • Epoxy-modified water-based alkyd resin and water-based alkyd amino stoving varnish and preparation method of epoxy-modified water-based alkyd resin and water-based alkyd amino stoving varnish.

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 98.73g of refined linseed oil, 10.18g of E-20, and 50.90g of trimethylolpropane into a straight-necked four-necked flask equipped with a stirring paddle, a thermometer, a condenser, and nitrogen gas, raise the temperature to about 120°C, and add 0.1g of LiOH catalyst, then slowly raise the temperature to 240°C and keep it warm for about 1 hour to obtain the alcoholysis product monoglyceride; when the product cools down to 160°C, add 61.47g of phthalic anhydride, start stirring, add 100g of xylene as a reflux solvent, At the same time, add 5 drops of esterification catalyst PC-9800, continue heating to 220-230°C and keep warm until the acid value is lower than 10mg KOH g -1 When it is qualified, stop heating, vacuumize to remove xylene, and feed N 2 , lower the temperature to 150-170°C, add 16.25g of trimellitic anhydride, raise the temperature to about 160°C, keep warm until the acid value is 40-60mg KOH·g -1 stop the reaction; cool the product to about 100°C, add ...

Embodiment 2

[0041] This implementation example adopts the same synthesis process as Example 1, only the epoxy resin in the raw material is replaced with E-44, and the amount of raw material is adjusted. The specific formula and specifications are shown in Tables 4, 5, and 6.

[0042] Table 4 Epoxy-modified water-based alkyd resin main formulation composition (component A)

[0043]

[0044] Table 5 Epoxy modified water-based alkyd resin technical indicators

[0045]

[0046] Table 6 Epoxy-modified water-based alkyd amino baking varnish formula

[0047]

[0048]

Embodiment 3

[0050] This implementation example adopts the same synthesis process as Example 2, only the amount of raw materials is changed, and the specific formula and specifications are shown in Tables 7, 8, and 9.

[0051] Table 7 Epoxy-modified water-based alkyd resin main formula composition (component A)

[0052]

[0053] Table 8 Epoxy modified water-based alkyd resin technical indicators

[0054]

[0055] Table 9 Epoxy-modified water-based alkyd amino baking varnish formula

[0056]

[0057] The epoxy-modified water-based alkyd amino baking varnish prepared by the above-mentioned method of the present invention adopts a standard detection method, and its performance detection results are shown in Table 10.

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Abstract

The invention discloses epoxy-modified water-based alkyd resin, water-based alkyd amino stoving varnish and a preparation method of the epoxy-modified water-based alkyd resin and the water-based alkyd amino stoving varnish, belonging to the technical field of high molecular materials. The preparation method comprises the following steps: mixing vegetable oil, bisphenol A glycidyl ether epoxy resin and polyhydric alcohols to synthesize an alcoholysate monoglyceride; then, carrying out esterification reaction with phthalic anhydride, then hydrating by using trimellitic anhydride, and finally neutralizing and dispersing to obtain the epoxy-modified water-based alkyd resin (as a component A); and then, mixing the component A with various types of amino resins (as a component B) and a certain amount of pigments and filler, cosolvent, neutralizer and deionized water to prepare the amino stoving varnish. By using vegetable oil as a main raw material, an extremely small amount of solvent is used, and the method hardly depends on petroleum and is low in cost and the production process is simple and easy to control. The prepared stoving varnish can be widely applied to the fields such as industrial corrosion prevention and belongs to the environment-friendly coating.

Description

technical field [0001] The invention belongs to the coating field in fine chemical industry, relates to the preparation of epoxy resin modified water-based alkyd resin, and its compounding with amino resin, and relates to an epoxy-modified water-based alkyd amino baking varnish and a preparation method thereof. Background technique [0002] Alkyd resin refers to the introduction of fatty acid side chains in polyester, that is, a polyester modified with fatty acids. Water-based alkyd resin uses renewable vegetable oil or fatty acid as the main raw material, and uses water as the solvent, with low VOC content, which not only complies with the requirements of the times for environmental protection, but also reduces the consumption of petroleum due to the use of organic solvents; secondly, The molecular structure of water-based alkyd resin has high hydrocarbon content, low molecular polarity, and strong adjustability. It is widely used in industrial coatings, not only as primers...

Claims

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Application Information

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IPC IPC(8): C08G63/676C09D167/08C09D161/32C09D161/20
Inventor 夏正斌杨涛
Owner SOUTH CHINA UNIV OF TECH
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