阅读说明：本技术 水性环氧自流平面漆及其制备方法 (Water-based epoxy self-leveling finish paint and preparation method thereof ) 是由 周享平 于 2021-08-04 设计创作，主要内容包括：本发明公开了一种水性环氧自流平面漆及其制备方法,该面漆以质量份数计,由以下原料组成：嵌段异氰酸酯改性环氧树脂、聚酯树脂、纳米碳纤维粉、聚苯粉、纳米蒙脱石、石英粉、消泡剂、流平剂、分散剂、防沉降剂、蜡乳液、硅藻土分散液和固化剂。本发明的配方比例合理,具有非常强的附着力,耐磨,硬度高,保温隔热性能好,具有较好的耐候耐热和阻燃性,无毒、无污染,安全环保。(The invention discloses a water-based epoxy self-leveling finish paint and a preparation method thereof, wherein the finish paint comprises the following raw materials in parts by mass: the block isocyanate modified epoxy resin, the polyester resin, the carbon nanofiber powder, the polyphenyl powder, the montmorillonite, the quartz powder, the defoaming agent, the leveling agent, the dispersing agent, the anti-settling agent, the wax emulsion, the diatomite dispersion liquid and the curing agent. The invention has reasonable formula proportion, strong adhesive force, wear resistance, high hardness, good heat insulation performance, better weather resistance, heat resistance and flame retardance, no toxicity, no pollution, safety and environmental protection.)

1. The water-based epoxy self-leveling finish paint is characterized by comprising the following raw materials in parts by mass:

wherein the acid value of the block isocyanate modified epoxy resin is 70-100 mgKOH/g, and the epoxy value equivalent weight is 600-830 g/eq; the acid value of the polyester resin is 70-85 mgKOH/g, and the epoxy equivalent weight is 700-830 g/eq.

2. The water-based epoxy self-leveling finish paint according to claim 1, wherein the particle size of the quartz powder is 100-120 meshes, and the particle size of the nano montmorillonite is 150-200 meshes.

3. The waterborne epoxy self-leveling topcoat paint of claim 1, wherein the defoamer is a phenethyl alcohol oleate, polydimethylsiloxane, polyoxyethylene polyoxypropylene amine ether or polyoxyethylene polyoxypropylene pentaerythritol ether.

4. The waterborne epoxy self-leveling topcoat as claimed in claim 1, wherein the leveling agent is a BYK-323 leveling agent or a BYK-3550 leveling agent.

5. The waterborne epoxy self-leveling topcoat paint of claim 1, wherein the dispersant is a polyacrylate dispersant, a polyoxyethylene ether dispersant, or a silicate dispersant.

6. The waterborne epoxy self-leveling topcoat as claimed in claim 1, wherein the anti-settling agent is a polyamide wax, a modified polyurea N-methyl pyrrolidone, or an amide modified castor oil.

7. The waterborne epoxy self-leveling topcoat paint of claim 1, wherein the curing agent is an epoxy curing agent, a polyamide curing agent, or a waterborne amine curing agent.

8. The waterborne epoxy self-leveling topcoat of claim 1, wherein the wax emulsion is at least one of a polyethylene wax emulsion, a paraffin wax emulsion, and a palm wax emulsion.

9. A method of making the waterborne epoxy self-leveling topcoat of any of claims 1-8, comprising the steps of:

(1) putting the block isocyanate modified epoxy resin, the polyester resin, the carbon nanofiber powder, the polyphenyl powder, the nano montmorillonite and the quartz powder into a stirrer according to a proportion, mixing and stirring for 5-10 min, then adding a defoaming agent, a leveling agent, a dispersing agent, an anti-settling agent, a wax emulsion and a diatomite dispersion liquid, dispersing at a high speed, and increasing the rotating speed to 1000-2000 rpm;

(2) adding a curing agent, charging nitrogen gas, stirring at a low speed in vacuum, and stirring at a rotating speed of 500-600 rpm for 8-12 min.

10. The method for preparing the waterborne epoxy self-leveling topcoat paint according to claim 9, wherein the diatomite dispersion is prepared by the following steps:

adding a dispersing agent into diatomite for fine grinding to enable fine clay impurities contained in the diatomite shell to be dissociated from the diatomite, then removing the fine clay impurities through centrifugal precipitation, then carrying out wet-type ultrafine grinding to enable the average force to reach 00.4-00.8 mu m, and then carrying out surface treatment on the mixed liquid to obtain the diatomite dispersion liquid.

Technical Field

The invention relates to the technical field of floor paint, in particular to a water-based epoxy self-leveling finish paint and a preparation method thereof.

Background

The epoxy floor coating has the advantages of no seam, solid texture, corrosion resistance, water resistance, dust prevention, convenient maintenance, low maintenance cost and the like, so the epoxy floor coating is widely applied to the floors of workshops and parking lots of product factories requiring high cleanness, attractiveness, dust-free and sterility, such as medicine, electric appliances, electronics, machinery, chemical engineering, textile, clothing, furniture, plastics, cultural and the like. However, the adhesion, weather and heat resistance, wear resistance and hardness of the existing epoxy floor coatings are still to be improved.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a water-based epoxy self-leveling finish paint and a preparation method thereof.

In order to achieve the purpose, the invention provides a water-based epoxy self-leveling finish paint, which comprises the following raw materials in parts by weight:

wherein the acid value of the block isocyanate modified epoxy resin is 70-100 mgKOH/g, and the epoxy value equivalent weight is 600-830 g/eq; the acid value of the polyester resin is 70-85 mgKOH/g, and the epoxy equivalent weight is 700-830 g/eq.

Preferably, the particle size of the quartz powder is 100 to 120 meshes, and the particle size of the nano montmorillonite is 150 to 200 meshes.

Preferably, the defoaming agent is phenethyl alcohol oleate, polydimethylsiloxane, polyoxyethylene polyoxypropylene amine ether or polyoxyethylene polyoxypropylene pentaerythritol ether.

Preferably, the leveling agent is a BYK-323 leveling agent or a BYK-3550 leveling agent.

Preferably, the dispersant is a polyacrylate dispersant, a polyoxyethylene ether dispersant or a silicate dispersant.

Preferably, the anti-settling agent is polyamide wax, modified polyurea N-methyl pyrrolidone or amide modified castor oil.

Preferably, the curing agent is an epoxy curing agent, a polyamide curing agent or a water-based amine curing agent.

Preferably, the wax emulsion is at least one of polyethylene wax emulsion, paraffin wax emulsion and palm wax emulsion.

The second aspect of the invention provides a preparation method of a water-based epoxy self-leveling finish paint, which comprises the following steps:

(1) putting the block isocyanate modified epoxy resin, the polyester resin, the carbon nanofiber powder, the polyphenyl powder, the nano montmorillonite and the quartz powder into a stirrer according to a proportion, mixing and stirring for 5-10 min, then adding a defoaming agent, a leveling agent, a dispersing agent, an anti-settling agent, a wax emulsion and a diatomite dispersion liquid, dispersing at a high speed, and increasing the rotating speed to 1000-2000 rpm;

(2) adding a curing agent, charging nitrogen gas, stirring at a low speed in vacuum, and stirring at a rotating speed of 500-600 rpm for 8-12 min.

Preferably, the preparation method of the diatomite dispersion liquid is as follows:

adding a dispersing agent into diatomite for fine grinding to enable fine clay impurities contained in the diatomite shell to be dissociated from the diatomite, then removing the fine clay impurities through centrifugal precipitation, then carrying out wet-type ultrafine grinding to enable the average force to reach 00.4-00.8 mu m, and then carrying out surface treatment on the mixed liquid to obtain the diatomite dispersion liquid.

Compared with the prior art, the invention has the beneficial effects that:

1. the coating is reasonable in formula proportion, consists of blocked isocyanate modified epoxy resin, polyester resin, carbon nanofiber powder, polyphenyl powder, nano montmorillonite, quartz powder, a defoaming agent, a leveling agent, a dispersing agent, an anti-settling agent, a wax emulsion, a diatomite dispersion liquid and a curing agent, has very strong adhesive force, is wear-resistant, high in hardness, good in heat preservation and heat insulation performance, good in weather resistance, heat resistance and flame retardance, and is non-toxic, pollution-free, safe and environment-friendly.

2. According to the invention, the block isocyanate modified epoxy resin and the polyester resin are combined, so that the adhesion of the finish paint can be obviously improved, the block isocyanate modified epoxy resin and the polyester resin can be quickly cured by the curing agent, the toughness of the coating is improved, the acid value of the block isocyanate modified epoxy resin is 70-100 mgKOH/g, the epoxy equivalent is 600-830 g/eq, the acid value of the polyester resin is 70-85 mgKOH/g, the epoxy equivalent is 700-830 g/eq, and the crosslinking density of the block isocyanate modified epoxy resin after the curing reaction with the polyester resin is higher.

3. The nano carbon fiber powder is combined with the polyphenyl powder, the nano carbon fiber powder has a pore structure, so that the finish paint has good heat insulation performance, meanwhile, the nano carbon fiber powder has high strength, can enhance the wear resistance of the finish paint, is corrosion resistant, can enhance the corrosion resistance of the finish paint, has excellent crack resistance, low heat conductivity coefficient and good heat insulation performance, and can increase the heat insulation performance of the finish paint when being used together with the nano carbon fiber powder.

4. The nano montmorillonite can be used as a filler of the finish paint to increase the hardness, and can also be coated on the surface of the carbon nanofiber powder to further enhance the heating performance of the carbon nanofiber powder and improve the weather resistance, heat resistance and flame retardance, and the nano montmorillonite can enhance the water resistance and ultraviolet resistance. The nano montmorillonite, the nano carbon fiber powder and the polyphenyl powder are combined, so that the wear resistance and the self density of a finish paint film can be greatly improved.

5. The diatomite dispersion liquid has the characteristics of large porosity, strong absorptivity, stable chemical property, less impurities, wear resistance, heat resistance and the like, can provide excellent surface performance for finish paint, and can increase the volume, thicken and improve the adhesive force, so that the paint film is shortened in drying time.

5. The dispersing agent and the anti-settling agent can ensure that the carbon nanofiber powder, the polyphenyl powder, the nano montmorillonite and the quartz powder can be uniformly dispersed in the blocked isocyanate modified epoxy resin and the polyester resin without settling.

6. The wax emulsion of the invention has better waterproof and moistureproof capabilities.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The embodiment 1 of the invention provides a water-based epoxy self-leveling finish paint, which comprises the following raw materials in parts by mass:

50 parts of blocked isocyanate modified epoxy resin; 60 parts of polyester resin (polyester-epoxy resin); 10 parts of carbon nanofiber powder; 4 parts of polyphenyl powder; 10 parts of nano montmorillonite; quartz powder 80; 0.1 part of defoaming agent; 0.2 part of a leveling agent; 0.2 part of a dispersant; 0.1 part of anti-settling agent; 80 parts of a curing agent; 2 parts of wax emulsion; 2 parts of diatomite dispersion liquid.

Wherein the acid value of the block isocyanate modified epoxy resin is 70mgKOH/g, and the epoxy equivalent weight is 600 g/eq; the acid value of the polyester resin is 70mgKOH/g, and the epoxy equivalent weight is 700 g/eq.

The particle size of the quartz powder is 100 meshes, and the particle size of the nano montmorillonite is 150 meshes.

The defoaming agent is phenethyl alcohol oleate. The leveling agent is a BYK-323 leveling agent. The dispersant is polyacrylate dispersant. The anti-settling agent is polyamide wax. The curing agent is an epoxy curing agent. The wax emulsion is a polyethylene wax emulsion.

A preparation method of a water-based epoxy self-leveling finish paint comprises the following steps:

(1) proportionally placing the block isocyanate modified epoxy resin, the polyester resin, the carbon nanofiber powder, the polyphenyl powder, the nano montmorillonite and the quartz powder into a stirrer for mixing and stirring for 5min, then adding the defoaming agent, the leveling agent, the dispersing agent, the anti-settling agent, the wax emulsion and the diatomite dispersion liquid, dispersing at a high speed, and increasing the rotating speed to 1000 rpm;

(2) adding curing agent, charging nitrogen gas to stir at low speed in vacuum, and stirring at 500rpm for 8 min.

Example 2

The embodiment 2 of the invention provides a water-based epoxy self-leveling finish paint, which comprises the following raw materials in parts by mass:

60 parts of blocked isocyanate modified epoxy resin; 60 parts of polyester resin; 12 parts of carbon nanofiber powder; 5 parts of polyphenyl powder; 15 parts of nano montmorillonite; 100 parts of quartz powder; 0.15 part of defoaming agent; 0.5 part of a leveling agent; 0.3 part of a dispersant; 0.2 part of anti-settling agent; 90 parts of a curing agent; 5 parts of wax emulsion. A diatomaceous earth dispersion; 5 parts of a diatomite dispersion liquid.

Wherein the acid value of the block isocyanate modified epoxy resin is 80mgKOH/g, and the epoxy equivalent weight is 700 g/eq; the acid value of the polyester resin is 75mgKOH/g, and the epoxy value equivalent is 800 g/eq.

The particle size of the quartz powder is 1000 meshes, and the particle size of the nano montmorillonite is 160 meshes.

The defoaming agent is polydimethylsiloxane. The leveling agent is a BYK-323 leveling agent. The dispersing agent is polyoxyethylene ether dispersing agent. The anti-settling agent is modified polyurea N-methyl pyrrolidone. The curing agent is a polyamide curing agent. The wax emulsion is paraffin wax emulsion.

A preparation method of a water-based epoxy self-leveling finish paint comprises the following steps:

(1) proportionally placing the block isocyanate modified epoxy resin, the polyester resin, the carbon nanofiber powder, the polyphenyl powder, the nano montmorillonite and the quartz powder into a stirrer for mixing and stirring for 8min, then adding the defoaming agent, the leveling agent, the dispersing agent, the anti-settling agent, the wax emulsion and the diatomite dispersion liquid, dispersing at a high speed, and increasing the rotating speed to 1500 rpm;

(2) adding curing agent, charging nitrogen gas to stir at low speed in vacuum, and stirring at 500rpm for 10 min.

Example 3

The embodiment 3 of the invention provides a water-based epoxy self-leveling finish paint, which comprises the following raw materials in parts by mass:

70 parts of blocked isocyanate modified epoxy resin; 70 parts of polyester resin; 14 parts of carbon nanofiber powder; 7 parts of polyphenyl powder; 18 parts of nano montmorillonite; 110 parts of quartz powder; 0.3 part of defoaming agent; 1 part of a leveling agent; 0.4 part of a dispersant; 0.4 part of anti-settling agent; 90 parts of a curing agent; 6 parts of wax emulsion; 6 parts of a diatomite dispersion liquid.

Wherein the acid value of the block isocyanate modified epoxy resin is 100mgKOH/g, and the epoxy equivalent weight is 800 g/eq; the acid value of the polyester resin is 85mgKOH/g, and the epoxy value equivalent is 800 g/eq.

The particle size of the quartz powder is 120 meshes, and the particle size of the nano montmorillonite is 160 meshes.

The defoaming agent is polyoxyethylene polyoxypropylene ether. The leveling agent is a BYK-3550 leveling agent. The dispersant is a silicate dispersant. The anti-settling agent is amide modified castor oil. The curing agent is a water-based amine curing agent. The wax emulsion is a palm wax emulsion.

A preparation method of a water-based epoxy self-leveling finish paint comprises the following steps:

(1) putting the block isocyanate modified epoxy resin, the polyester resin, the carbon nanofiber powder, the polyphenyl powder, the nano montmorillonite and the quartz powder into a stirrer according to a proportion, mixing and stirring for 5-10 min, then adding a defoaming agent, a leveling agent, a dispersing agent, an anti-settling agent, a wax emulsion and a diatomite dispersion liquid, dispersing at a high speed, and increasing the rotating speed to 1600 rpm;

(2) adding curing agent, charging nitrogen gas to stir at low speed in vacuum, and stirring for 12min at the rotating speed of 600 rpm.

Example 4

The embodiment 4 of the invention provides a water-based epoxy self-leveling finish paint, which comprises the following raw materials in parts by mass:

75 parts of blocked isocyanate modified epoxy resin; 75 parts of polyester resin; 15 parts of carbon nanofiber powder; 8 parts of polyphenyl powder; 20 parts of nano montmorillonite; 120 parts of quartz powder; 0.3 part of defoaming agent; 1 part of a leveling agent; 0.5 part of a dispersant; 0.5 part of anti-settling agent; 100 parts of a curing agent; 8 parts of wax emulsion; 8 parts of a diatomite dispersion liquid.

Wherein the acid value of the block isocyanate modified epoxy resin is 100mgKOH/g, and the epoxy equivalent weight is 830 g/eq; the acid value of the polyester resin is 85mgKOH/g, and the epoxy equivalent weight is 830 g/eq.

The particle size of the quartz powder is 120 meshes, and the particle size of the nano montmorillonite is 200 meshes.

The defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether. The leveling agent is a BYK-3550 leveling agent. The dispersant is polyacrylate dispersant. The anti-settling agent is polyamide wax. The curing agent is an epoxy curing agent. The wax emulsion is polyethylene wax emulsion and paraffin wax emulsion.

A preparation method of a water-based epoxy self-leveling finish paint comprises the following steps:

(1) proportionally placing the block isocyanate modified epoxy resin, the polyester resin, the carbon nanofiber powder, the polyphenyl powder, the nano montmorillonite and the quartz powder into a stirrer for mixing and stirring for 10min, then adding the defoaming agent, the leveling agent, the dispersing agent, the anti-settling agent, the wax emulsion and the diatomite dispersion liquid, dispersing at a high speed, and increasing the rotating speed to 2000 rpm;

(2) adding curing agent, charging nitrogen gas to stir at low speed in vacuum, and stirring for 12min at the rotating speed of 600 rpm.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.