Water-based single-component modified epoxy resin as well as preparation method and application thereof

An epoxy resin, one-component technology, applied in the field of polymers, can solve the problems of slow drying speed, high content of unsaturated fatty acids, large particle size of epoxy emulsion, etc., and achieve long service life, good adhesion and convenient use Effect

Pending Publication Date: 2021-10-19
JIANGMEN PAINT FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the related art, CN101463180B discloses a preparation method of water-based single-component externally emulsified epoxy resin emulsion. The method adopts nonionic emulsifier and anionic emulsifier to emulsify epoxy resin. Although the operation process is simple, the disadvantage is that External emulsification method, the epoxy emulsion produced has a large particle size and poor storage stability
CN108424521A discloses a preparation method of water-based self-emulsifying single-component epoxy resin emulsion, the method adopts unsaturated fatty acid modified epoxy resin, the content of unsaturated fatty acid is high, the drying speed is slow, and it is difficult to adhere to substrates such as galvanized Poor adhesion to plates, aluminum, etc.

Method used

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  • Water-based single-component modified epoxy resin as well as preparation method and application thereof
  • Water-based single-component modified epoxy resin as well as preparation method and application thereof
  • Water-based single-component modified epoxy resin as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] In this example, a water-based one-component modified epoxy resin is prepared, and the specific preparation process is as follows:

[0049] The E12 epoxy resin of 800g, 200g linseed oil fatty acid hemp, 72g soybean oil fatty acid, 1.1g zinc oxide catalyst are put into reaction still, be warmed up to 140 degree and react until acid value is less than 3; Add 355g ethylene glycol tert-butyl ether, 14g ring Stir the oxyphosphate ester evenly, keep the temperature at 150°C, add dropwise a mixture of 7g DTAP initiator and 280g methyl methacrylate within 3-4h, then dropwise add a mixture of 2gDTAP initiator and 65g acrylic acid within 0.5-1h, keep at 150°C for 1h , then add 1gDTAP initiator for the first time, keep warm for 1h, then add 1gDTAP initiator for the second time and keep warm for 1h, and add 1gDTAP initiator for the third time and keep warm for 2-3h. Cool down to 80°C, add 91g of triethylamine neutralizer dropwise within 30 minutes, then add 1790g of deionized water...

Embodiment 2

[0057] In this example, a water-based one-component modified epoxy resin is prepared, and the specific preparation process is as follows:

[0058] Heat 380g of E51 epoxy resin, 6g of F51 novolac epoxy resin, 4.5g of polyether sulfonate, 185g of bisphenol A, 40g of benzoic acid, 10g of coconut oil fatty acid and 6.25g of epoxy phosphate to 100°C, stir and mix evenly, Add 0.9g of boron trifluoride amine complex, react at 120°C-130°C for 2h, and take samples to measure the epoxy value;

[0059]When the theoretical value is reached, add 269g of ethylene glycol tert-butyl ether and stir evenly, lower the temperature to 60°C and slowly add 359g of deionized water dropwise, and at the same time turn the speed to 1200r / min, stir for 2 hours, and obtain a water-based single-component solution through phase transformation Modified epoxy resin dispersion.

[0060] Through preliminary testing, the water-based one-component modified epoxy resin prepared by the present invention:

[0061]...

Embodiment 3

[0067] In this example, a water-based one-component modified epoxy resin is prepared, and the specific preparation process is as follows:

[0068] The E12 epoxy resin of 800g, 150g dehydrated ricinoleic acid hemp, 122g soybean oil fatty acid, 1.1g zinc oxide catalyst are dropped into reactor, be warmed up to 140 degree and react to acid value less than 3; Add 355g ethylene glycol tert-butyl ether, Stir 14g epoxy phosphate ester evenly, keep the temperature at 150°C, add 7g DTAP initiator and 280g methyl methacrylate mixture dropwise within 3-4h, then add 2g DTAP initiator and 65g acrylic acid mixture dropwise within 0.5-1h, 150°C Keep warm for 1h, then add 1gDTAP initiator for the first time, keep warm for 1h, then add 1gDTAP initiator for the second time, keep warm for 1h, and add 1gDTAP initiator for the third time, keep warm for 2-3h. Cool down to 80°C, add 91g of triethylamine neutralizer dropwise within 30 minutes, then add 1790g of deionized water dropwise within 1.5h, a...

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Abstract

The invention provides water-based single-component modified epoxy resin as well as a preparation method and application thereof. The water-based single-component modified epoxy resin comprises the preparation raw materials: epoxy resin, a modifier, an adhesion promoter, a catalyst, an initiator, a hydrophilic monomer, a cosolvent and a neutralizer, wherein the epoxy resin comprises at least one of E20, E44, E51, E54, F51 and E12. The water-based single-component modified epoxy resin is convenient to use, long in service life, quick to dry, high in gloss, good in salt mist resistance, particularly good in adhesive force to substrates difficult to adhere, such as galvanized plates and aluminum plates, wide in universality and environmentally friendly. The invention also provides a coating composition containing the water-based single-component modified epoxy resin and a coating product.

Description

technical field [0001] The invention belongs to the technical field of macromolecules, and in particular relates to a water-based one-component modified epoxy resin and a preparation method and application thereof. Background technique [0002] Epoxy resin (Epoxy Resin) contains two or more epoxy groups, with alicyclic or aromatic organic compounds as the skeleton, and forms a practical thermosetting product through the reaction of epoxy groups. Polymer. Epoxy resin alone has almost no use value. Only when it is used in conjunction with a curing agent to react with a polymer with a three-dimensional network structure can its application value be reflected. Epoxy resin is a thermosetting resin. There are three main types of epoxy resins commonly used: bisphenol A epoxy resin, novolac epoxy resin and bisphenol F epoxy resin. Epoxy resins contain active groups such as epoxy groups, hydroxyl groups, ether bonds, and polar groups, and have many excellent properties. Epoxy resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F220/14C08F220/06C09D151/08C09D163/00C08G59/14C08G59/16
CPCC08F290/064C09D151/08C09D163/00C08G59/14C08G59/1488C08G59/1472C08G59/1438C08G59/1455C08F220/14C08F220/06
Inventor 张新昌
Owner JIANGMEN PAINT FACTORY
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