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Solvent-free anticorrosive coating material and preparation method thereof

An anti-corrosion coating, solvent-free technology, applied in anti-corrosion coatings, polyester coatings, polyamide coatings, etc., can solve problems such as poor adhesion, and achieve the effects of increasing molecular weight, improving mechanical properties, and improving adhesion properties

Active Publication Date: 2020-06-19
FOSHAN GREEN INTELLIGENT MFG RES INST OF XIANGTAN UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-corrosion effect of the solvent-free heavy-duty anti-corrosion coatings on the market needs to be further improved, and the adhesion between the substrate and the substrate is poor, which is not conducive to the long-term protection of marine engineering equipment in the harsh environment.

Method used

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  • Solvent-free anticorrosive coating material and preparation method thereof
  • Solvent-free anticorrosive coating material and preparation method thereof

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preparation example Construction

[0094] Further, the present invention also provides a method for preparing any of the solvent-free anticorrosive coatings described above, wherein the preparation of the first component includes the following steps:

[0095] Mix the silane coupling agent with the epoxy resin and react at 20°C~40°C for 1h~2h to obtain the epoxy resin modified by the silane coupling agent;

[0096] The first component is obtained by stirring and mixing the epoxy resin modified by the silane coupling agent, the polyamide resin, the alkyd resin, the functional auxiliary agent and the filler.

[0097] In one example, the stirring and mixing is to mix and stir the silane coupling agent-modified epoxy resin, polyamide resin, alkyd resin, dispersant, defoamer, leveling agent and anti-settling agent, and then Add the rheological additive and stir, then add the rheological additive and stir.

[0098] The volume ratio of silane coupling agent and epoxy resin is 1:(10~15).

[0099] Epoxy resins are prep...

Embodiment 1

[0105] This embodiment provides a preparation method of a solvent-free anticorrosive coating, which preparation method comprises the following steps:

[0106] (1) Preparation of bisphenol A epoxy resin

[0107] Install the stirrer, return condenser tube and thermometer on the 500mL three-necked flask. Add 11.4g of bisphenol A, 46.5g of epichlorohydrin and 4.1g of NaOH into the three-neck flask, mix and stir, then slowly heat to 80°C, and finish the reaction after 3 hours. The reaction liquid is filtered to remove the by-product NaCl, and the excess epichlorohydrin is distilled off under reduced pressure at 60°C to 70°C for recycling. Then stop the distillation, and pour the residue into a small beaker while hot to obtain a light yellow, transparent, viscous bisphenol A type epoxy resin.

[0108] (2) Preparation of polysilane-modified bisphenol A epoxy resin

[0109] Mix the silane coupling agent KH-550 and the bisphenol A epoxy resin at a volume ratio of 1:10, and stir at 4...

Embodiment 2

[0113] This embodiment provides a preparation method of a solvent-free anticorrosive coating, which preparation method comprises the following steps:

[0114] (1) Preparation of bisphenol A epoxy resin

[0115] Install the stirrer, return condenser tube and thermometer on the 500mL three-necked flask. Add 12.4g of bisphenol A, 48.5g of epichlorohydrin and 4.2g of NaOH into the three-necked flask, mix and stir, then slowly heat to 80°C, and finish the reaction after 3 hours of reaction. The reaction liquid is filtered to remove the by-product NaCl, and the excess epichlorohydrin is distilled off under reduced pressure at 60°C to 70°C for recycling. Then stop the distillation, and pour the residue into a small beaker while hot to obtain a light yellow, transparent, viscous bisphenol A type epoxy resin.

[0116] (2) Preparation of polysilane-modified bisphenol A epoxy resin

[0117] Mix the silane coupling agent KH-550 and the bisphenol A epoxy resin at a volume ratio of 1:12,...

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Abstract

The invention relates to a solvent-free anticorrosive coating material and a preparation method thereof. The solvent-free anticorrosive coating material comprises a first component and a second component, wherein the first component comprises 40-60 parts of a silane coupling agent modified epoxy resin, 20-30 parts of a polyamide resin, 5-10 parts of an alkyd resin, 2-18 parts of a functional aid and 40-60 parts of a filler, and the second component comprises a curing agent. According to the invention, a resin is modified with a silane coupling agent, and the silane coupling agent and the epoxyresin are subjected to a cross-linking effect, so that the molecular weight is increased, and the mechanical property, the water resistance, the weather resistance and the like of the resin are improved; and the silane coupling agent can improve the bonding performance of the resin, and the advantages of the epoxy resin, the polyamide resin and the alkyd resin are combined, so that the characteristics of good film-forming property and high adhesive force of the epoxy resin are achieved, and the characteristics of high viscosity and good gloss retention of the alkyd resin and the characteristics of good flexibility, wear resistance, oil resistance, water resistance and chemical corrosion resistance of the polyamide resin are also achieved.

Description

technical field [0001] The invention relates to the technical field of anticorrosion, in particular to a solvent-free anticorrosion coating and a preparation method thereof. Background technique [0002] Corrosion has always been one of the biggest challenges facing the steel, metallurgy, construction, transportation and other industries. Statistics show that every one and a half minutes, 1 ton of steel in the world is corroded into slag. The loss caused by corrosion in my country in 2015 was as high as 3 trillion yuan. According to this calculation, if correct protective measures are taken, my country can reduce at least 750-1.2 trillion yuan of corrosion loss every year. [0003] Anti-corrosion coatings are currently the most economical, most commonly used and most effective means of anti-corrosion protection for metal or concrete materials. Anti-corrosion coatings are usually divided into two types: conventional type and heavy-duty anti-corrosion type according to the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D177/00C09D167/08C09D5/08
CPCC08L2205/03C09D5/08C09D163/00C08L77/00C08L67/08
Inventor 欧阳晓平李伟华刘法谦曹文凯
Owner FOSHAN GREEN INTELLIGENT MFG RES INST OF XIANGTAN UNIV
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