阅读说明：本技术 一种环氧酯防锈水漆及其制备方法 (Epoxy ester antirust water paint and preparation method thereof ) 是由 李幕英 程璐 张禹 刘国旭 荆旺 荆通 于 2021-06-30 设计创作，主要内容包括：本发明涉及涂料技术领域,具体公开一种环氧酯防锈水漆及其制备方法。所述环氧酯防锈水漆包括以下质量百分含量的组分：水性环氧酯乳液20-30％、颜填料10-15％、有机改性磷酸锌钙5-10％、填料20-30％、分散剂1.5-2.5％、消泡剂0.1-0.3％、炔二醇表面活性剂0.5-1％、流变助剂0.5-1％、防闪锈剂1-2％和去离子水20％-30％。本发明提供的环氧酯防锈水漆相对于传统的单组份水性漆具有更好的早、中、晚期防锈性能,可以在带锈、带油基材上直接进行涂装,具有极佳的附着力。(The invention relates to the technical field of coatings, and particularly discloses epoxy ester antirust water paint and a preparation method thereof. The epoxy ester antirust water paint comprises the following components in percentage by mass: 20-30% of water-based epoxy ester emulsion, 10-15% of pigment and filler, 5-10% of organic modified zinc calcium phosphate, 20-30% of filler, 1.5-2.5% of dispersing agent, 0.1-0.3% of defoaming agent, 0.5-1% of acetylenic diol surfactant, 0.5-1% of rheological additive, 1-2% of flash rust inhibitor and 20-30% of deionized water. Compared with the traditional single-component water-based paint, the epoxy ester antirust water paint provided by the invention has better early, middle and late antirust performances, can be directly coated on rusty and oiled base materials, and has excellent adhesive force.)

1. An epoxy ester antirust water paint is characterized in that: the paint comprises the following components in percentage by mass:

20-30% of water-based epoxy ester emulsion, 10-15% of pigment filler, 5-10% of organic modified zinc calcium phosphate, 20-30% of filler, 1.5-2.5% of dispersant, 0.1-0.3% of defoaming agent, 0.5-1% of acetylenic diol surfactant, 0.5-1% of rheological additive, 1-2% of flash rust inhibitor and 20-30% of deionized water;

the type of the waterborne epoxy ester emulsion is ETERKYD W34310; the model of the organic modified calcium zinc phosphate is RZCP-701.

2. The epoxy ester rust inhibitive water paint according to claim 1, characterized in that: the pigment and filler is iron oxide red.

3. The epoxy ester rust inhibitive water paint according to claim 1, characterized in that: the filler is barium sulfate.

4. The epoxy ester rust inhibitive water paint according to claim 1, characterized in that: the dispersant is an aqueous solution containing a high pigment affinity group polymer and a surfactant, and is specifically dispersant 760W.

5. The epoxy ester rust inhibitive water paint according to claim 1, characterized in that: the defoaming agent is mineral oil defoaming agent.

6. The epoxy ester rust inhibitive water paint according to claim 1, characterized in that: the type of the alkynediol surfactant is surfynol104 DPM.

7. The epoxy ester rust inhibitive water paint according to claim 1, characterized in that: the rheological additive is a polyurethane type rheological additive.

8. The epoxy ester rust inhibitive water paint according to claim 1, characterized in that: the model of the flash rust inhibitor is Raybo 80.

9. The method for producing an epoxy ester rust inhibitive water paint according to any one of claims 1 to 8, characterized in that: the method comprises the following process steps:

a. sequentially adding the dispersing agent, the defoaming agent and the pigment filler into the deionized water according to the mass ratio, stirring and mixing, and then grinding to obtain initial slurry;

b. and sequentially adding the aqueous epoxy ester emulsion, the organic modified zinc calcium phosphate, the filler, the anti-flash rust agent and the alkynediol surfactant into the initial slurry, stirring and mixing, and adjusting to a specified viscosity by using a rheological additive to obtain the epoxy ester antirust water paint.

10. The method for preparing an epoxy ester rust inhibitive water paint according to claim 9, characterized in that: in the step a, the rotating speed of stirring and mixing is 400-600r/min, and the time is 15-25 min;

and/or in the step a, the fineness of the grinding treatment is less than or equal to 15 mu m;

and/or in the step b, the rotation speed of the stirring and mixing is 700-.

Technical Field

The invention relates to the technical field of coatings, in particular to epoxy ester antirust water paint and a preparation method thereof.

Background

With the rapid development of the industry, the metal surface corrosion prevention work is more and more highly emphasized by various industries. There are many ways to prevent corrosion of metals, but the use of paint coatings to protect is the most effective and economical and the most common method as evidenced by a number of protective practices. The paint coating protection has the advantages of simple construction, wide adaptability and no influence of the area and the shape of equipment, and the paint protection can be used in combination with other protection measures, so that a perfect anti-corrosion system can be obtained conveniently.

Although the variety of the current paints is various, most of the paints suitable for metal corrosion protection are solvent-based protective paints. The solvent-based protective paint has the defects of high VOC content, serious pollution and fire hazard. Later, although water-based protective paint appeared, based on the property of the water-based protective paint, in order to ensure that the water-based protective paint has better protective performance, a large amount of auxiliary agents and antirust components are required to be added, and the production cost is higher. And the prior water-based protective paint used for corrosion prevention of metal surfaces also needs strict rust removal treatment on the surface of a rusted base material to ensure the adhesive force of the rusted base material. If a one-component aqueous protective paint is used, there are some defects such as poor initial water resistance, poor salt spray resistance, and poor adhesion during metal protection.

Disclosure of Invention

Aiming at the problems of the existing metal protective paint, the invention provides the epoxy ester antirust water paint and the preparation method thereof, the epoxy ester antirust water paint is a single-component water paint, has good early, middle and late antirust performance and adhesive force, can be directly coated on a rusty substrate with oil, does not have the defects of blooming, falling off and the like in a formed paint film, and greatly improves the application range of the single-component water paint in the field of metal corrosion prevention.

In order to achieve the purpose of the invention, the embodiment of the invention adopts the following technical scheme:

an epoxy ester antirust water paint comprises the following components in percentage by mass:

20-30% of water-based epoxy ester emulsion, 10-15% of pigment filler, 5-10% of organic modified zinc calcium phosphate, 20-30% of filler, 1.5-2.5% of dispersant, 0.1-0.3% of defoaming agent, 0.5-1% of acetylenic diol surfactant, 0.5-1% of rheological additive, 1-2% of flash rust inhibitor and 20-30% of deionized water;

the type of the waterborne epoxy ester emulsion is ETERKYD W34310, and concretely, the Yongxing waterborne epoxy ester emulsion ETERKYD W34310 can be selected; the type of the organic modified zinc calcium phosphate is RZCP-701, and concretely comprises one hundred-hour organic modified zinc calcium phosphate RZCP-701.

Compared with the prior art, the epoxy ester antirust water paint provided by the invention is a single-component epoxy ester antirust water paint, wherein the water-based epoxy ester resin emulsion ETERKYD W34310 and the organic modified zinc calcium phosphate RZCP-701 antirust pigment are combined with the auxiliary agent, so that the obtained epoxy ester antirust water paint has good water resistance and salt spray resistance, and has better early, middle and late antirust performances compared with the traditional single-component water paint product. Meanwhile, the surfactant with the chemical structure of the alkynediol is added to jointly act with the aqueous epoxy ester resin emulsion and the organic modified zinc calcium phosphate, so that defoaming, wetting enhancement, adhesion improvement and flow and leveling property improvement can be facilitated, and the epoxy ester antirust water paint can be directly coated on rusty and oiled substrates and has excellent adhesion. And the epoxy ester antirust water paint has no defects of blooming, falling off and the like on a paint film formed on the surface of a metal substrate, and the application range of the single-component water paint in the field of metal corrosion resistance is greatly improved.

Preferably, the pigment and filler is iron oxide red.

Preferably, the filler is barium sulfate.

Preferably, the dispersant is an aqueous solution of a polymer containing high pigment affinity groups and a surfactant, and particularly, a dikao dispersant 760W can be selected.

The preferable dispersant can well reduce the grinding viscosity in the preparation process of the water paint, has excellent tinting strength, further reduces the viscosity of the water paint and enhances the tinting strength, and does not affect the water resistance of a formed paint film.

Preferably, the defoaming agent is a mineral oil defoaming agent, and particularly, a rosidia defoaming agent DF5800C can be selected.

The preferable defoaming agent can rapidly remove foams and play a role for a long time in the epoxy ester antirust water paint system, is not influenced by extreme temperature and pressure, is still effective in acidic and alkaline environments, and solves the problem that the epoxy ester antirust water paint is influenced and limited by external environmental conditions in the preparation and construction processes.

Preferably, the product model of the alkynediol surfactant is surfynol104DPM, and particularly, surfynol104DPM of Kaiyn chemical company of Shanghai can be selected.

The preferred alkyne diol surfactant can further promote defoaming, strengthen wetting, improve adhesive force, improve flowing and leveling property in the epoxy ester antirust water paint system, and can avoid the problem of poor water resistance commonly caused by adding the surfactant in the water paint.

Preferably, the rheological additive is a polyurethane type rheological additive, and particularly RM-8W of Rohm and Haas can be selected.

The preferred rheology assistant can further prevent the pigment and filler from settling and improve the sag resistance of the coating film.

Preferably, the product model of the anti-flash rust agent is Raybo 80, and particularly, Raybo 80 can be selected from American Rebao.

The invention also provides a preparation method of the epoxy ester antirust water paint. The preparation method comprises the following steps:

a. sequentially adding the dispersing agent, the defoaming agent and the pigment filler into the deionized water according to the mass ratio, stirring and mixing, and then grinding to obtain initial slurry;

b. and sequentially adding the aqueous epoxy ester emulsion, the organic modified zinc calcium phosphate, the filler, the anti-flash rust agent and the alkynediol surfactant into the initial slurry, stirring and mixing, and adjusting to a specified viscosity by using a rheological additive to obtain the epoxy ester antirust water paint.

Compared with the prior art, the preparation method of the epoxy ester antirust water paint provided by the invention is simple to operate, convenient to construct, low in equipment requirement and capable of being popularized and used.

Preferably, in the step a, the rotation speed of the stirring and mixing is 400-.

Preferably, in the step a, the fineness of the grinding treatment is less than or equal to 15 mu m.

Preferably, in the step b, the rotation speed of the stirring and mixing is 700-.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

An epoxy ester antirust water paint comprises the following components in percentage by mass:

wherein the water-based epoxy ester emulsion ETERKYD W34310 is the Changxing water-based epoxy ester emulsion ETERKYD W34310;

the organic modified zinc-calcium phosphate RZCP-701 is one hundred-hour organic modified zinc-calcium phosphate RZCP-701;

the dispersant 760W is a digao dispersant 760W;

the antifoaming agent DF5800C is antifoaming agent DF5800C of Rhodia;

the alkynediol surfactant surfynol104DPM is surfynol104DPM of Kay chemical company of Shanghai;

the polyurethane type rheological additive RM-8W is RM-8W of Rohm and Haas;

the flash rust inhibitor Raybo 80 is Raybo 80 from Raybo of Rambo of America.

The preparation method of the epoxy ester antirust water paint comprises the following steps:

a. sequentially adding a dispersing agent 760W, a defoaming agent DF5800C and iron oxide red into deionized water according to the mass ratio, stirring and mixing for 20min at a speed of 500r/min, and then grinding until the fineness is less than or equal to 15 mu m to obtain initial slurry;

b. stirring the initial slurry at a stirring speed of 600r/min for 5min, then sequentially adding an aqueous epoxy ester emulsion ETERKYD W34310, organic modified zinc-calcium phosphate RZCP-701, barium sulfate, an anti-flash rust agent Raybo 80 and an alkynediol surfactant into the initial slurry, stirring at 800r/min for 20min, and adding a polyurethane rheological aid RM-8W to adjust the viscosity, thereby obtaining the epoxy ester antirust water paint.

Comparative example 1

The same amount of aluminum tripolyphosphate zinc powder is used to replace the organically modified zinc calcium phosphate RZCP-701 in the example 1, and other components, content and preparation method are the same as those in the example 1, so that the epoxy ester antirust water paint is prepared.

Comparative example 2

Equivalent nonylphenol polyoxyethylene ether is used for replacing the alkynediol surfactant surfynol104DPM in the example 1, other components, the content and the preparation method are the same as those in the example 1, and the epoxy ester antirust water paint is prepared.

The service performances of the epoxy ester antirust water paints obtained in the examples 1 to 3 and the comparative examples 1 to 2 are detected, and the detection results are shown in the following table 1:

TABLE 1

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.