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Waterborne epoxy resin for stoving varnish and preparation method and application

A water-based epoxy resin and epoxy resin technology, used in epoxy resin coatings, coatings, etc., can solve the problems of low VOC, many organic solvents, and unenvironmental protection of water-dispersed epoxy resins, and achieve consistent performance and low VOC. , Environmentally friendly effect

Inactive Publication Date: 2017-09-08
江苏三木化工股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: the purpose of the present invention is to address the problems of prior art epoxy resins for baking varnishes, which have many organic solvents and are not environmentally friendly, and screen components through a large number of experiments to develop and design a water-based epoxy resin with strong environmental protection, which can make environmental protection Oxygen resin is dispersed in water. The whole preparation process can avoid the use of a large amount of organic solvents, and only use a small amount of environmentally friendly solvents. At the same time, deionized water is used instead of a large amount of organic solvents. The prepared water-dispersed epoxy resin has low VOC, and its performance is comparable to that of solvent-based epoxy resins. Consistent, achieved very good technical results

Method used

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  • Waterborne epoxy resin for stoving varnish and preparation method and application
  • Waterborne epoxy resin for stoving varnish and preparation method and application
  • Waterborne epoxy resin for stoving varnish and preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～ Embodiment 10

[0024] Prepare 10 different epoxy resins for baking varnishes, which are used as shown in Table 1.

[0025] Table 1 Preparation of water-based epoxy resin raw material components and their proportions for baking varnish

[0026]

[0027] 1. The preparation method of water-based epoxy resin for baking varnish, the steps are as follows:

[0028] (1) Dissolve epoxy resin E-06 in ethylene glycol monobutyl ether BCS according to the 10 parts by weight in the above table 1, heat to 120°C, and stir for 15 minutes;

[0029] (2) Stir and mix acrylic acid, styrene, methyl methacrylate, butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, and benzoyl peroxide, and add dropwise to step (1) at 120°C to mix evenly In the solution, the dropping time is 2 to 2.5 hours; then the temperature is kept at 120°C for 3 hours, and a small amount of benzoyl peroxide is added during the heat preservation reaction to completely polymerize the monomer;

[0030] (3) Then cool down to 60°C, add d...

Embodiment 11

[0033] Embodiment 11 performance test, concrete steps are as follows:

[0034] 1. Get 10 parts of tinplate and polish it smooth, remove the surface oxide layer; use the coating wire bar to scrape the water-based epoxy resin for baking varnish prepared in Examples 1 to 10 respectively to obtain an epoxy resin varnish film, and after the paint film is cured The thickness is between 15 and 20 μm;

[0035] 2. After coating, put it in a 50°C oven to preheat for 10 minutes to avoid surface defects caused by direct high-temperature heating, and then put the preheated substrate at 270°C for 40 seconds to cure;

[0036] The following properties were measured for the paint film cured according to the above steps:

[0037] (1) Surface appearance; (2) Hardness, impact resistance; (3) T-bend test; (4) Adhesion; (5) Ethanol, acetone wiping resistance;

[0038] The specific inspection results are shown in Table 2:

[0039]

[0040]

[0041] Show by above performance test result, the...

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Abstract

The invention discloses waterborne epoxy resin for stoving varnish. The waterborne epoxy resin is prepared from epoxy resin, acrylic acid, butyl acrylate, iso-octyl acrylate, hydroxyethyl acrylate, methyl methacrylate, styrene, benzoyl peroxide, ethylene glycol monobutyl ether, dimethylethanolamine and deionized water. The best raw material ratio is obtained through screening of a large number of experiments, the environmental friendliness is high, and epoxy resin can be dispersed into water; in the whole preparation technology, a large quantity of organic solvent can be prevented from being adopted, only a small quantity of environment-friendly solvent is adopted, deionized water is adopted for replacing the large quantity of organic solvent, the prepared water dispersion epoxy resin is low in VOC, the performance of the epoxy resin is the same as that of solvent type epoxy resin, and the waterborne epoxy resin has the excellent hardness, shock resistance and adhesive force and has the good technical effect.

Description

technical field [0001] The invention relates to an epoxy resin, in particular to an environmentally friendly water-based epoxy resin for baking varnish and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Most of the existing epoxy resin baking varnishes are solvent-based, and a large amount of organic solvents need to be added in the process of preparation and use. The defects of the prior art epoxy resin baking varnishes are: 1. Unhealthy and environmentally friendly, a large amount of organic solvents volatilize in the air Among them, it will cause great damage to the health of users and pollute the air; 2. The cost is high. Compared with water, organic solvents are expensive and inconvenient to transport; 3. The danger of flammability and explosion is high. [0003] Therefore, on the basis of the prior art, the present invention develops and designs a water-based epoxy resin for baking varnishes that is en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/10C08F220/06C08F220/18C08F220/28C08F220/14C08F212/08C08F8/32C08G59/40C08G59/50C09D163/00C09D151/08
CPCC09D151/08C09D163/00C08F8/32C08F283/10C08G59/4014C08G59/508C08G59/5086C08F220/281C08F220/1808C08F220/1804
Inventor 蒋震惠正权马丹馨
Owner 江苏三木化工股份有限公司
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