阅读说明：本技术 一种用于集装箱的水性环氧防腐底漆 (water-based epoxy anticorrosive primer for container ) 是由 雷振国 张晓村 于 2019-09-09 设计创作，主要内容包括：本发明提供了一种用于集装箱的水性环氧防腐底漆及其制备方法,所述水性环氧防腐底漆由重量份配比为12:1的A组分和B组分组成,A组分包括环氧树脂乳液、水性功能性乳液、功能性屏蔽填料、滑石粉、防锈颜料、着色颜料、分散剂、润湿剂、成膜助剂、增稠剂、消泡剂和纯净水；B组分包括水溶性改性胺固化剂、防闪锈剂和纯净水。环氧乳液经水性功能性乳液改性,在改善了对底材的附着力同时又提高了漆膜的干燥性和耐水性。功能性屏蔽填料的加入增强了漆膜的屏蔽效应,明显提升了漆膜的防腐性能。本发明的水性环氧防腐底漆为水性漆产品,VOC含量低,用水稀释,健康环保,同时漆膜干燥快、附着力好,防腐性能优异。(The invention provides a water-based epoxy anticorrosive primer for a container and a preparation method thereof, wherein the water-based epoxy anticorrosive primer consists of a component A and a component B in a weight ratio of 12:1, wherein the component A comprises epoxy resin emulsion, water-based functional emulsion, functional shielding filler, talcum powder, anti-rust pigment, coloring pigment, dispersing agent, wetting agent, film-forming assistant, thickening agent, defoaming agent and purified water; the component B comprises a water-soluble modified amine curing agent, an anti-flash rust agent and purified water. The epoxy emulsion is modified by the water-based functional emulsion, so that the adhesion to a substrate is improved, and the dryness and water resistance of a paint film are improved. The addition of the functional shielding filler enhances the shielding effect of the paint film and obviously improves the corrosion resistance of the paint film. The water-based epoxy anticorrosive primer is a water-based paint product, has low VOC content, is diluted by water, is healthy and environment-friendly, and has the advantages of quick drying of a paint film, good adhesive force and excellent anticorrosive performance.)

1. The water-based epoxy anticorrosive primer for the container is characterized by consisting of a component A and a component B, wherein the component A comprises epoxy resin emulsion, water-based functional emulsion, functional shielding filler, talcum powder, antirust pigment, coloring pigment, dispersing agent, wetting agent, film-forming assistant, thickening agent, defoaming agent and purified water; the component B comprises a water-soluble modified amine curing agent, an anti-flash rust agent and purified water; the weight ratio of the component A to the component B is 12: 1.

2. The waterborne epoxy anticorrosion primer for containers of claim 1, wherein:

the component A comprises the following components in parts by weight:

40.0 to 45.0 percent of epoxy resin emulsion;

4.0 to 6.0 percent of aqueous functional emulsion;

0.5 to 1.0 percent of dispersant;

0.1 to 0.2 percent of surfactant;

0.1 to 0.5 percent of defoaming agent;

5.0 to 10.0 percent of iron oxide pigment;

5.0 to 8.0 percent of antirust pigment;

3.0-5.0% of functional filler;

7.0 to 15.0 percent of talcum powder;

1.5 to 3.0 percent of film forming additive;

0.2 to 1.0 percent of thickening agent;

12.0 to 18.0 percent of purified water;

The component B comprises the following components in parts by weight:

50.0-60.0% of water-soluble modified amine curing agent;

0.5-2.0% of flash rust inhibitor;

40.0 to 50.0 percent of purified water.

3. the waterborne epoxy anticorrosion primer for containers of claim 1, wherein: the solid content of the epoxy resin emulsion in the component A is 53 percent; the aqueous functional emulsion is aqueous alkyl olefin resin emulsion, and the solid content of the aqueous functional emulsion is 50 percent; the dispersant is nonionic dispersant, and the solid content of the dispersant is 60%; the surfactant is a gemini surfactant based on siloxane; the defoaming agent is polyether modified organic silicon defoaming agent; the iron oxide pigment is iron oxide red; the rust-proof pigment is zinc phosphate; the functional filler is water-based aluminum paste; the talcum powder is 2500 meshes of talcum powder, and the water-soluble substance of the talcum powder is less than or equal to 0.5 percent; the film-forming assistant is dipropylene glycol butyl ether; the thickener is nonionic polyurethane associative thickener; the conductivity of the purified water is less than or equal to 6 mu m/cm.

4. the waterborne epoxy anticorrosion primer for containers of claim 1, wherein: the water-soluble modified amine curing agent in the component B is a water-soluble aliphatic amine adduct, and the solid content of the water-soluble modified amine curing agent is 70%; the flash rust inhibitor is a special amine flash rust inhibitor, and the effective component content of the flash rust inhibitor is 22 percent; the conductivity of the purified water is less than or equal to 6 mu m/cm.

5. A method for preparing the waterborne epoxy anticorrosive primer for containers according to any one of claims 1 to 4, comprising the steps of:

(1) preparation of a component A: putting the epoxy resin emulsion, the water-based functional emulsion, the dispersant, the surfactant and the defoaming agent into a mixing tank, stirring at the rotation speed of 400-600RPM, and stirring for 10-15 minutes to mix uniformly; then sequentially adding iron oxide red, zinc phosphate anti-rust pigment and talcum powder, adjusting the stirring rotating speed to 1000-1200RPM, stirring and dispersing for 20-30 minutes at the temperature of less than or equal to 60 ℃; then grinding and dispersing the mixed slurry through a sand mill, wherein the fineness is less than or equal to 50 micrometers, the temperature is less than or equal to 60 ℃, and pumping the dispersed slurry to a blending tank; adding the functional filler aqueous aluminum powder slurry into a batching pull cylinder, adding purified water, adjusting the rotating speed to 400-600RPM, stirring for 10-15 minutes, uniformly mixing, filtering by a 100-mesh sieve, and adding into a blending tank; adjusting the stirring rotation speed of the blending tank to 400-600RPM, sequentially adding the film-forming aid and the thickening agent, stirring for 10-15 minutes, and uniformly mixing to obtain a component A;

(2) B, preparation of a component: adding the water-soluble modified amine curing agent into a material drawing cylinder, stirring at the rotating speed of 800RPM of 600 plus materials, adding purified water in 3-7 steps, and separating for 5-10 minutes every time; after the purified water is completely added, adjusting the rotating speed to 400-600RPM, stirring for 30 minutes, then adding the anti-flash rust agent, continuously stirring for 10-15 minutes, and uniformly mixing to obtain a component B;

(3) preparing a primer: adding the component B into the component A at the rotation speed of 400-600RPM, and stirring for 5-10 minutes until the components are uniformly mixed to obtain the water-based epoxy zinc-rich primer; wherein the weight ratio of the component A to the component B is 12: 1.

Technical Field

the invention relates to the field of heavy corrosion resistance, in particular to a water-based epoxy anticorrosive primer for a container.

Background

At present, the production rhythm of the container is fast, and the water-based epoxy primer generally has the problem of poor corrosion resistance caused by slow drying speed.

Disclosure of Invention

The invention aims to provide a water-based epoxy anticorrosive primer with high drying speed and excellent anticorrosive performance and a preparation method thereof, so that the primer is suitable for the rapid pace of container production, and the defects of the existing product technology are overcome.

in order to achieve the purpose, the invention provides a water-based epoxy anticorrosive primer for a container, which consists of a component A and a component B, wherein the component A comprises an epoxy resin emulsion, a water-based functional emulsion, a functional shielding filler, talcum powder, an antirust pigment, a coloring pigment, a dispersing agent, a wetting agent, a film-forming assistant, a thickening agent, an antifoaming agent and purified water; the component B comprises a water-soluble modified amine curing agent, an anti-flash rust agent and purified water; the weight ratio of the component A to the component B is 12: 1.

Further, the component A comprises the following components in parts by weight:

40.0 to 45.0 percent of epoxy resin emulsion;

4.0 to 6.0 percent of aqueous functional emulsion;

0.5 to 1.0 percent of dispersant;

0.1 to 0.2 percent of surfactant;

0.1 to 0.5 percent of defoaming agent;

5.0 to 10.0 percent of iron oxide pigment;

5.0 to 8.0 percent of antirust pigment;

3.0-5.0% of functional filler;

7.0 to 15.0 percent of talcum powder;

1.5 to 3.0 percent of film forming additive;

0.2 to 1.0 percent of thickening agent;

12.0 to 18.0 percent of purified water;

the component B comprises the following components in parts by weight:

50.0-60.0% of water-soluble modified amine curing agent;

0.5-2.0% of flash rust inhibitor;

40.0 to 50.0 percent of purified water.

further, the solid content of the epoxy resin emulsion in the component A is 53 percent; the aqueous functional emulsion is aqueous alkyl olefin resin emulsion, and the solid content of the aqueous functional emulsion is 50 percent; the dispersant is nonionic dispersant, and the solid content of the dispersant is 60%; the surfactant is a gemini surfactant based on siloxane; the defoaming agent is polyether modified organic silicon defoaming agent; the iron oxide pigment is iron oxide red; the rust-proof pigment is zinc phosphate; the functional filler is water-based aluminum paste; the talcum powder is 2500 meshes of talcum powder, and the water-soluble substance of the talcum powder is less than or equal to 0.5 percent; the film-forming assistant is dipropylene glycol butyl ether; the thickener is nonionic polyurethane associative thickener; the conductivity of the purified water is less than or equal to 6 mu m/cm.

Further, the water-soluble modified amine curing agent in the component B is a water-soluble aliphatic amine adduct, and the solid content of the water-soluble modified amine curing agent is 70%; the flash rust inhibitor is a special amine flash rust inhibitor, and the effective component content of the flash rust inhibitor is 22 percent; the conductivity of the purified water is less than or equal to 6 mu m/cm.

A preparation method of a water-based epoxy anti-corrosion primer for a container comprises the following steps:

(1) Preparation of a component A: putting the epoxy resin emulsion, the water-based functional emulsion, the dispersant, the surfactant and the defoaming agent into a mixing tank, stirring at the rotation speed of 400-600RPM, and stirring for 10-15 minutes to mix uniformly; then sequentially adding iron oxide red, zinc phosphate anti-rust pigment and talcum powder, adjusting the stirring rotating speed to 1000-1200RPM, stirring and dispersing for 20-30 minutes at the temperature of less than or equal to 60 ℃; then grinding and dispersing the mixed slurry through a sand mill, wherein the fineness is less than or equal to 50 micrometers, the temperature is less than or equal to 60 ℃, and pumping the dispersed slurry to a blending tank; adding the functional filler aqueous aluminum powder slurry into a batching pull cylinder, adding purified water, adjusting the rotating speed to 400-600RPM, stirring for 10-15 minutes, uniformly mixing, filtering by a 100-mesh sieve, and adding into a blending tank; adjusting the stirring rotation speed of the blending tank to 400-600RPM, sequentially adding the film-forming aid and the thickening agent, stirring for 10-15 minutes, and uniformly mixing to obtain a component A;

(2) B, preparation of a component: adding the water-soluble modified amine curing agent into a material drawing cylinder, stirring at the rotating speed of 800RPM of 600 plus materials, adding purified water in 3-7 steps, and separating for 5-10 minutes every time; after the purified water is completely added, adjusting the rotating speed to 400-600RPM, stirring for 30 minutes, then adding the anti-flash rust agent, continuously stirring for 10-15 minutes, and uniformly mixing to obtain a component B;

(3) preparing a primer: adding the component B into the component A at the rotation speed of 400-600RPM, and stirring for 5-10 minutes until the components are uniformly mixed to obtain the water-based epoxy zinc-rich primer, wherein the weight ratio of the component A to the component B is 12: 1.

the water-based epoxy anticorrosive primer provided by the invention has the following advantages:

the waterborne epoxy anticorrosive primer provided by the invention is prepared by modifying an epoxy resin emulsion by adopting a waterborne functional emulsion, taking the modified amine curing agent which can be dissolved in water as a film forming substance, and taking superfine zinc phosphate antirust pigment and waterborne aluminum paste as shielding functional fillers in a reasonable matching way.

1. According to the water-based epoxy anticorrosive primer provided by the invention, the water-based functional emulsion is adopted to modify the epoxy resin emulsion, so that the drying property of the paint can be obviously improved, the adhesive force to a metal substrate is obviously improved, and the salt spray resistance and the corrosion resistance of a paint film are obviously improved.

2. the water-based epoxy anticorrosive primer provided by the invention selects the water-soluble modified amine curing agent, has good compatibility with the modified water-based epoxy emulsion, forms a three-dimensional network structure through curing and crosslinking, and has a compact paint film and good anticorrosive performance. Meanwhile, the anti-flash rust agent is matched with a special amine anti-flash rust agent, and the anti-flash rust effect is obvious.

3. The waterborne epoxy anticorrosive primer provided by the invention has the advantages that the selected superfine zinc phosphate antirust pigment is easy to disperse, the anticorrosive efficiency is high, a compact passive film can be formed on the surface of a metal substrate, and the anticorrosive performance of a paint film is obviously improved.

4. The waterborne epoxy anticorrosive primer provided by the invention adopts the waterborne aluminum paste as the functional filler, the waterborne aluminum paste has a sheet structure, the thickness of the waterborne aluminum paste is obviously lower than that of other sheet fillers such as mica powder, more laminated layers can be obtained with less addition amount, the permeation of moisture and oxygen can be effectively prevented, and the anticorrosive effect is obviously improved. Because the aqueous aluminum paste is easy to react with moisture and is unstable in the aqueous paint, the aqueous aluminum paste coated on the surface is adopted, so that the aqueous aluminum paste can be kept stable in the aqueous paint.

5. according to the water-based epoxy anticorrosive primer provided by the invention, the geminal structure surfactant based on siloxane is selected, so that excellent wetting property is ensured, good defoaming property is realized, the adhesive force of a paint film is excellent, the paint film is compact, and the shielding property and the anticorrosive property of the paint film are further improved.

6. The water-based epoxy anticorrosive primer provided by the invention selects the nonionic polyurethane associated thickener, is easy to disperse and add later, forms a three-dimensional network structure through stirring, shearing and activating, and is convenient for workshop production and adjustment.

7. the waterborne epoxy anticorrosive primer provided by the invention selects high-boiling-point dipropylene glycol butyl ether as a film forming aid, and can be fused with emulsion resin liquid drops to form a continuous coating film after the moisture of a paint film is volatilized and before the epoxy resin is crosslinked and cured.

through the reasonable matching, the water-based epoxy anticorrosive primer provided by the invention has the advantages of fast drying of a paint film, good anticorrosive performance, excellent salt spray resistance, and no obvious change of the performance of a coating film after 1000 hours of neutral salt spray. The product effectively solves the contradiction that the production rhythm of the container is fast and the paint film is dried slowly, and has excellent corrosion resistance.

Detailed Description

The present invention will now be described in further detail with reference to examples.