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Waterborne one-component epoxy resin emulsion and preparation method thereof

A technology of epoxy resin emulsion and epoxy resin, which is applied in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve problems such as complex process operations, high production costs, and easy occurrence of flash rust, and achieve wide sources of raw materials, Improve efficiency and save energy

Inactive Publication Date: 2018-08-21
李嘉顺
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, epoxy resins currently prepared by self-emulsification, especially one-component epoxy resins, are often prepared through neutralization and salt formation or complex raw materials and processes. For neutralization and salt formation of epoxy emulsions, it is easy to Flash rust occurs; for the other one, it requires higher production cost and complicated process operation, so we explore a relatively simple preparation process, convenient operation, strong versatility and one-component water-based preparation process with better performance. Epoxy resin emulsion is necessary

Method used

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  • Waterborne one-component epoxy resin emulsion and preparation method thereof
  • Waterborne one-component epoxy resin emulsion and preparation method thereof
  • Waterborne one-component epoxy resin emulsion and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] 1. Unsaturated fatty acid modified epoxy resin is prepared according to the following quality raw materials: add 190g epoxy resin E51 and 278g linoleic acid to the reaction flask, then add 200g ethylene glycol monobutyl ether, and 1g three Phenyl phosphorus, stir evenly at high speed, heat up to about 130°C, react for about 4 hours, and then measure the acid value. When the acid value is less than 5% of the initial value, the temperature will stop the reaction;

[0036] 2. Add 102g of acetic anhydride and 400g of polyethylene glycol monomethyl ether with a molecular weight of 400 to the reactor, add 1g of triethylamine, stir well, raise the reaction temperature to 100°C, and cool down after 3 hours of reaction Discharge;

[0037] 3. Take 200 g of the reactant in step 2 and 300 g of the reactant in step 1 and add the mixture in step 1 to the reactor, add 1 g of benzyl dimethylamine while stirring and heat up to 90°C, and react for 4 hours Then, the temperature was lowered to...

Embodiment 2

[0040] 1. The unsaturated fatty acid modified epoxy resin is prepared according to the following quality raw materials: add 190g epoxy resin E51 and 250g tungoleic acid into the reaction flask, then add 200g dipropylene glycol methyl ether and 1g triphenylphosphorus, Stir uniformly at high speed, heat up to about 120°C, react for about 4 hours, and then measure the acid value. When the acid value is less than 5% of the initial value, the temperature will stop the reaction;

[0041] 2. Add 148g of phthalic anhydride and 600g of polyethylene glycol monomethyl ether with a molecular weight of 600 to the reactor, add 1g of triethylamine, stir evenly, raise the reaction temperature to 110°C, and react 3. Cool down and discharge after hours;

[0042] 3. Take 350 g of the reactant in step 2 and 300 g of the reactant in step 1 and add the mixture in step 1 to the reactor, add 1 g of triethylamine while stirring and raise the temperature to 100°C. After reacting for 4 hours, cool down When...

Embodiment 3

[0045] 1. The unsaturated fatty acid modified epoxy resin is prepared according to the following quality raw materials: 250g epoxy resin E20 and 125g tungoleic acid are added to the reaction flask, then 200g dipropylene glycol butyl ether is added, and 1g triphenylphosphorus is added. Stir uniformly at high speed, heat up to about 120°C, react for about 4 hours, and then measure the acid value. When the acid value is less than 5% of the initial value, the temperature will stop the reaction;

[0046] 2. Add 148g of phthalic anhydride and 600g of polyethylene glycol monomethyl ether with a molecular weight of 600 to the reactor, add 1g of triethylamine, stir evenly, raise the reaction temperature to 110°C, and react 3. Cool down and discharge after hours;

[0047] 3. Take 350 g of the reactant in step 2 and 550 g of the reactant in step 1 and add the mixture in step 1 to the reactor, add 1 g of benzyl dimethylamine while stirring and raise the temperature to 100°C, and react for 4 ho...

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Abstract

The invention discloses a one-component epoxy emulsion and a preparation method thereof. The method comprises the following steps: synthesizing unsaturated fatty acid modified epoxy resin; simultaneously subjecting maleic anhydride and polyethylene glycol monomethyl ether to an esterification reaction so as to prepare a hydrophilic chain segment with a terminal end containing a carboxyl group, andthen subjecting the hydrophilic chain segment and the above-mentioned unsaturated fatty acid modified epoxy resin to an esterification reaction to introduce the hydrophilic chain segment onto the side chain of epoxy resin so as to prepare the waterborne one-component epoxy emulsion. According to the invention, a coating film form by the epoxy emulsion provided by the invention has good adhesion force, high hardness, good mechanical strength and toughness, and excellent corrosion resistance; meanwhile, a coating prepared from the emulsion provided by the invention shows good storage stabilityand corrosion resistance.

Description

Technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a main resin for anticorrosive coatings mainly used for steel products, in particular to a preparation method of a water-based dispersible one-component epoxy emulsion, and the invention also relates to the water-based epoxy The emulsion is used in water-based industrial anticorrosive primer. Background technique [0002] With the increasingly strict environmental protection, water-based coatings are gradually emerging. Compared with oil-based paints, water-based paints can greatly reduce the use of organic solvents, thereby reducing environmental pollution and potential hazards to operators, and it is convenient for factories to take safety measures and transportation. As a green water-based solvent Environmental protection coatings have broad application prospects. [0003] Currently commonly used water-based resins include water-based epoxy resin, water-based polyurethane...

Claims

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Application Information

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IPC IPC(8): C08G81/00C08G59/16C08G65/331C08J3/03C09D163/00C09D5/08C09D7/61
CPCC08G81/00C08G59/1461C08G65/331C08J3/03C08J2363/00C08K3/34C08K3/346C08K13/02C08K2003/2272C08K2003/3045C09D5/08C09D163/00
Inventor 李嘉顺
Owner 李嘉顺
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