Epoxy resin modified waterborne acrylic resin dispersion

A water-based acrylic and acrylic resin technology, which is applied in coatings, anti-corrosion coatings, etc., can solve the problems of performance degradation, resin gelation and performance degradation, hidden dangers of storage stability, etc., and achieve excellent salt spray resistance, weather resistance and gloss retention Good, low-temperature film-forming effect

Pending Publication Date: 2021-11-05
广东花果山环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some properties have been improved, the high activity and high salt spray resistance of epoxy resin are not outstanding. This is because the epoxy group can no longer strongly interact with the substrate after ring opening, resulting in the combination of the paint film and the substrate. are not tight, thus degrading performance
[0004] In addition, these methods involving the hybrid modification of acrylic acid and epoxy, almost all use the method of neutralizing the carboxyl group to achieve hydrophilicity, but this process is easy to cause resin gelation due to the high reaction between the carboxyl group and epoxy group With performance degradation, there are also potential hidden dangers in storage stability

Method used

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  • Epoxy resin modified waterborne acrylic resin dispersion

Examples

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Effect test

preparation example Construction

[0041] The preparation of the dispersion selects any of the following three preparation methods:

[0042] Preparation method 1: make a primer with epoxy resin and organic solvent, add acrylate monomers step by step, keep warm, neutralize, and then add water to disperse;

[0043] Preparation method 2: After acrylic resin is synthesized by adding acrylate monomers dropwise into an organic solvent, epoxy resin is added in the middle, after high-speed mixing, add water to disperse;

[0044] Preparation method three: after the acrylic resin is synthesized in the acrylic resin monomer, epoxy resin is added after adding water to disperse;

[0045] In general, method 1 and method 2 are preferred.

Embodiment 1

[0047] Add 100g of epoxy resin E51, 100g of No. 100 solvent naphtha, and 100g of ethylene glycol butyl ether into the reaction bottle and stir to raise the temperature to 140-148°C. At the same time, pass nitrogen gas to exhaust the air in the bottle. Keep the temperature range and prepare to add acrylic acid mono bodies and initiators;

[0048] Mix 350g of methyl methacrylate, 250g of styrene, 550g of butyl methacrylate, and 125g of hydroxyethyl methacrylate into the dropping funnel;

[0049] Mix 25g of t-amyl peroxide, 25g of No. 100 solvent naphtha, and 25g of ethylene glycol butyl ether, and pack it with another dropping funnel; first, add 1 / 5 of the initiator mixture to the bottle,

[0050] After that, the monomer and the initiator funnel start to add materials dropwise at the same time, and the drops are completed synchronously after 4-5 hours;

[0051] Then add 5g of t-amyl peroxide and keep warm for one hour;

[0052] Then 125g of methyl methacrylate, 150g of monomet...

Embodiment 2

[0060] Add 120g of epoxy resin E511, 150g of No. 100 solvent oil, and 100g of ethylene glycol butyl ether into the reaction bottle, stir and raise the temperature to 130-140°C, and at the same time, pass nitrogen gas to exhaust the air in the bottle, keep the temperature range, and prepare to add acrylic acid mono bodies and initiators;

[0061] Mix 300g of methyl methacrylate, 200g of styrene, 530g of butyl methacrylate, 2g of acrylic acid, and 350g of hydroxyethyl methacrylate into the dropping funnel;

[0062] Mix 35g of t-amyl peroxide and 25g of ethylene glycol butyl ether evenly, and install it with another dropping funnel; first add one-fifth of the initiator mixture to the bottle, and then the monomer and the initiator funnel At the same time, start to add the material dropwise, after 4-5 hours, the dripping is completed synchronously, and then add 5g of t-amyl peroxide, and keep warm for one hour;

[0063] Then 50 g of methyl methacrylate, 150 g of polyethylene glyco...

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Abstract

The invention discloses an epoxy resin modified waterborne acrylic resin dispersion which comprises the following raw materials: epoxy ester resin and acrylic resin, and the acrylic resin comprises the following components: an acrylic monomer a1, an acrylic monomer a2, an acrylic monomer a3, an acrylic monomer a4 and an initiator; the acrylic monomer a1 is ester generated by alcohol with 1-12 carbons and acrylic acid or methacrylic acid; the acrylic monomer a2 is an acrylic acid or methacrylate monomer containing at least one hydroxyl group; the acrylic monomer a3 is a compound containing an unsaturated polyoxyalkylene chain; and the acrylic monomer a4 is a monomer containing an amine-neutralizable acidic functional group. According to the invention, the epoxy ester resin and the acrylic resin are hybridized and compounded together to obtain the resin dispersion integrating the advantages of the two resins, the defects of the two resins are overcome, and the resin dispersion has the characteristics of better hardness, high glossiness, aging resistance and excellent salt spray resistance.

Description

technical field [0001] The invention relates to the technical field of water-based coating resins, in particular to an epoxy resin-modified water-based acrylic resin dispersion. Background technique [0002] At present, water-based acrylic resin dispersions are widely used in various industrial fields, including construction machinery, automobile buses, equipment casings, etc. Acrylic resin has the properties of high gloss, good fullness, high hardness, and excellent weather resistance, especially hydroxyacrylate resin with functional groups, which can be combined with isocyanate curing agent or amino resin to form water-based two-component polyurethane coating or High temperature baking paint, so that the paint film has more excellent chemical resistance. But at the same time, water-based acrylic resin also has its own shortcomings. Due to the introduction of a large number of hydrophilic groups into the resin chain, water resistance, chemical resistance, and salt spray re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/10C08F283/06C08F220/14C08F212/08C08F220/18C08F220/20C09D151/08C09D5/08
CPCC08F283/105C08F283/065C09D151/08C09D5/08C08F220/14C08F212/08C08F220/1804C08F220/20
Inventor 金秀华梁勇王睿翾
Owner 广东花果山环保科技有限公司
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