Water-borne epoxy resin composite moisture-resistant coating and production method thereof

Abstract

The invention provides a water-borne epoxy resin composite moisture-resistant coating which comprises main materials, the main materials comprise 40-60 parts of water-borne epoxy resin emulsion, 20-30 parts of a water-borne amine curing agent, 8-15 parts of bentonite and 5-10 parts of nano silicon dioxide, and the main materials form a core and auxiliary materials of a moisture-resistant part of the coating. The auxiliary materials comprise 10-15 parts of propylene glycol methyl ether acetate and 15-25 parts of deionized water, and the auxiliary materials form a core of an additional function of the coating; the invention relates to the technical field of production of moisture-resistant coatings, in particular to a moisture-resistant coating which comprises the following components in parts by weight: 1-3 parts of a KH-560 silane coupling agent, 0.8-2 parts of a cellulose thickener, 0.5-1.5 parts of a defoaming agent and 0.3-0.8 part of a pH regulator, and the additive forms the core of a finished product part of the coating. The main materials comprise 40-60 parts of the water-borne epoxy resin emulsion, 20-30 parts of the water-borne amine curing agent, 8-15 parts of the bentonite and 5-10 parts of the nano silicon dioxide, and the main materials form the core of the moisture-resistant part of the coating, so that the main materials have good moisture-proof performance and moisture-proof effect.

Description

Technical Field

[0001] The invention relates to the technical field of moisture-resistant coating production, in particular to a water-based epoxy resin composite moisture-resistant coating and a production method thereof. Background Art

[0002] Moisture-resistant coatings are protective coatings designed to withstand humid environments. They are widely used in moisture-prone areas such as building walls, basements, and bathrooms. Their core function is to form a dense barrier using hydrophobic or hygroscopic ingredients (such as silanes, acrylic resins, or nanomaterials) to prevent moisture penetration and the resulting mold growth, wall peeling, and metal corrosion. Some moisture-resistant coatings are also breathable, allowing for the slow release of moisture from the substrate while simultaneously preventing external moisture intrusion. This balances moisture resistance with wall durability, making them suitable for high-humidity climates or specialized industrial environments.

[0003] Despite breakthroughs in moisture-resistant coatings, existing products still lack functionality in complex environments. For example, long-term exposure to UV radiation can cause the organic polymers in the coating to undergo photooxidative degradation, leading to surface powdering, cracking, and even shedding, reducing protective effectiveness. This leaves room for improvement. Summary of the Invention

[0004] The object of the present invention is to provide a waterborne epoxy resin composite moisture-resistant coating and a production method thereof, so as to solve the problems raised in the background technology in the above content and overcome the technical defects thereof.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: a water-based epoxy resin composite moisture-resistant coating, comprising a main ingredient, wherein the main ingredient includes 40-60 parts of a water-based epoxy resin emulsion, 20-30 parts of a water-based amine curing agent, 8-15 parts of bentonite and 5-10 parts of nano-silica, wherein the main ingredient constitutes the core of the moisture-resistant part of the coating;

[0006] An auxiliary material, comprising 10-15 parts of propylene glycol methyl ether acetate and 15-25 parts of deionized water, the auxiliary material constituting the core of the additional function of the coating; and

[0007] The additives include 1-3 parts of KH-560 silane coupling agent, 0.8-2 parts of cellulose thickener, 0.5-1.5 parts of defoaming agent and 0.3-0.8 parts of pH regulator, and the additives constitute the core of the finished product part of the coating.

[0008] A waterborne epoxy resin composite moisture-resistant coating and a production method thereof, comprising

[0009] Step S1: adding water-based epoxy resin emulsion, water-based amine curing agent, bentonite and nano-silica into a blender and stirring and mixing to prepare a main material;

[0010] Step S2: adding the main material, propylene glycol methyl ether acetate, and deionized water into an ultrasonic slurry pretreatment machine, and performing ultrasonic pretreatment at 60° C. in an ultrasonic environment to remove the mineral film on the surface of the material, and then flotating and discarding the trivalent and divalent iron ions in the slurry to obtain an effective slurry;

[0011] Step S3: adding the additive to the effective slurry and mixing and stirring to prepare the coating;

[0012] Step S4: packaging and shipment.

[0013] As a further solution of the present invention: a water-based epoxy resin composite moisture-resistant coating, wherein the water-based epoxy resin emulsion is a copolymer of bisphenol A epoxy resin and polyvinyl alcohol glycidyl ether, with an epoxy equivalent weight of 300-400 g / eq and a solid content of 50±2%.

[0014] As a further solution of the present invention: a water-based epoxy resin composite moisture-resistant coating, the mass ratio of the nano-silica to the bentonite is 1:1.5-2.5, and the two are pre-dispersed at a rotation speed of 1200 rpm for 30 minutes.

[0015] As a further solution of the present invention: a water-based epoxy resin composite moisture-resistant coating also includes an antistatic absorber, the antistatic absorber includes zinc oxide whiskers, the zinc oxide whisker content is 0.5-2 parts, and the zinc oxide whiskers constitute the core of the antistatic part of the coating.

[0016] As a further solution of the present invention: a water-based epoxy resin composite moisture-resistant coating, the pH regulator is composed of triethanolamine and citric acid in a ratio of 2:1, and the pH value of the finished pH regulator is within the range of 8.5-9.2.

[0017] As a further solution of the present invention: a water-based epoxy resin composite moisture-resistant coating, the defoaming agent is composed of polyether-modified siloxane and mineral oil in a ratio of 3:1.

[0018] As a further solution of the present invention: a water-based epoxy resin composite moisture-resistant coating, the bentonite is sodium-based bentonite, and the bentonite is modified and alkalized with a sodium carbonate solution.

[0019] As a further solution of the present invention: a water-based epoxy resin composite moisture-resistant coating also includes a UV absorber, the UV absorber includes 2-phenylbenzimidazole-5-sulfonic acid, the content of the 2-phenylbenzimidazole-5-sulfonic acid is 0.1-0.5 parts, and the 2-phenylbenzimidazole-5-sulfonic acid constitutes the core of the UV protection part of the coating.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] Since the main ingredients include 40-60 parts of waterborne epoxy resin emulsion, 20-30 parts of waterborne amine curing agent, 8-15 parts of bentonite and 5-10 parts of nano-silicon dioxide, and the main ingredients constitute the core of the moisture-resistant part of the coating, the main ingredients have good moisture-proof performance and moisture-proof effect;

[0022] Since the auxiliary materials include 10-15 parts of propylene glycol methyl ether acetate and 15-25 parts of deionized water, and the auxiliary materials constitute the core of the additional functions of the coating, the addition of propylene glycol methyl ether acetate and 15-25 parts of deionized water to the coating can activate the bentonite in the main material and accelerate the synthesis speed of the coating;

[0023] Since the additives include 1-3 parts of KH-560 silane coupling agent, 0.8-2 parts of cellulose thickener, 0.5-1.5 parts of defoamer and 0.3-0.8 parts of pH regulator, and the additives constitute the core of the finished product part of the coating, the additives can be used to quickly synthesize and stabilize the coating, avoiding the problem of cracking or water loss of the coating;

[0024] Since the antistatic absorber includes zinc oxide whiskers, the content of the zinc oxide whiskers is 0.5-2 parts, and the zinc oxide whiskers constitute the core of the antistatic part of the coating, the zinc oxide whiskers can adjust the UV resistance of the coating and avoid the problem of premature cracking of the coating due to sunlight exposure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The disclosure of the present invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0026] Figure 1 The structural diagram of the process method proposed according to one embodiment of the present invention is schematically shown. DETAILED DESCRIPTION

[0027] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention and should not be regarded as the entire invention or as a limitation or restriction of the technical solution of the present invention.

[0028] According to one embodiment of the present invention, in conjunction with the accompanying drawings, a water-based epoxy resin composite moisture-resistant coating is shown, comprising a main ingredient, wherein the main ingredient comprises 40-60 parts of a water-based epoxy resin emulsion, 20-30 parts of a water-based amine curing agent, 8-15 parts of bentonite, and 5-10 parts of nano-silica, wherein the main ingredient constitutes the core of the moisture-resistant portion of the coating. During use, the water-based epoxy resin emulsion, the water-based amine curing agent, the bentonite, and the nano-silica are added to a blender and stirred to form the main ingredient; and an auxiliary ingredient, wherein the auxiliary ingredient comprises 10-15 parts of propylene glycol methyl ether acetate and 15-25 parts of deionized water, wherein the auxiliary ingredient constitutes the core of the additional function of the coating; The invention also provides an additive comprising 1-3 parts of a KH-560 silane coupling agent, 0.8-2 parts of a cellulose thickener, 0.5-1.5 parts of a defoamer, and 0.3-0.8 parts of a pH adjuster. The additive constitutes the core of the finished coating. Specifically, the main ingredients are 50 parts of a water-based epoxy resin emulsion, 25 parts of a water-based amine curing agent, 11.5 parts of bentonite, and 7.5 parts of nano-silica. 12.5 parts of propylene glycol methyl ether acetate and 20 parts of deionized water are added as auxiliary materials. Finally, 2 parts of a KH-560 silane coupling agent, 1.4 parts of a cellulose thickener, 1 part of a defoamer, and 0.5 parts of a pH adjuster are added. The components are mixed in a vacuum stirred tank at 800 rpm for 40 minutes to produce the coating.

[0029] Since the main ingredients include 40-60 parts of waterborne epoxy resin emulsion, 20-30 parts of waterborne amine curing agent, 8-15 parts of bentonite and 5-10 parts of nano-silicon dioxide, and the main ingredients constitute the core of the moisture-resistant part of the coating, the main ingredients have good moisture-proof performance and moisture-proof effect;

[0030] Since the auxiliary materials include 10-15 parts of propylene glycol methyl ether acetate and 15-25 parts of deionized water, and the auxiliary materials constitute the core of the additional functions of the coating, the addition of propylene glycol methyl ether acetate and 15-25 parts of deionized water to the coating can activate the bentonite in the main material and accelerate the synthesis speed of the coating;

[0031] Since the additives include 1-3 parts of KH-560 silane coupling agent, 0.8-2 parts of cellulose thickener, 0.5-1.5 parts of defoaming agent and 0.3-0.8 parts of pH regulator, and the additives constitute the core of the finished product part of the coating, the additives can be used to quickly synthesize and stabilize the coating, avoiding the problem of cracking or water loss of the coating.

[0032] A waterborne epoxy resin composite moisture-resistant coating and a production method thereof, comprising

[0033] Step S1: adding water-based epoxy resin emulsion, water-based amine curing agent, bentonite and nano-silica into a blender and stirring and mixing to prepare a main material;

[0034] Step S2: adding the main material, propylene glycol methyl ether acetate, and deionized water into an ultrasonic slurry pretreatment machine, and performing ultrasonic pretreatment at 60° C. in an ultrasonic environment to remove the mineral film on the surface of the material, and then flotating and discarding the trivalent and divalent iron ions in the slurry to obtain an effective slurry;

[0035] Step S3: adding the additive to the effective slurry and mixing and stirring to prepare the coating;

[0036] Step S4: packaging and shipment.

[0037] As a further solution of the present invention: a water-based epoxy resin composite moisture-resistant coating, wherein the water-based epoxy resin emulsion is a copolymer of bisphenol A epoxy resin and polyvinyl alcohol glycidyl ether, with an epoxy equivalent weight of 300-400 g / eq and a solid content of 50±2%.

[0038] As a further solution of the present invention: a water-based epoxy resin composite moisture-resistant coating, the mass ratio of the nano-silica to the bentonite is 1:1.5-2.5, and the two are pre-dispersed at a rotation speed of 1200 rpm for 30 minutes.

[0039] As a further solution of the present invention: a water-based epoxy resin composite moisture-resistant coating also includes an antistatic absorber, the antistatic absorber includes zinc oxide whiskers, the zinc oxide whisker content is 0.5-2 parts, and the zinc oxide whiskers constitute the core of the antistatic part of the coating.

[0040] Since the antistatic absorber includes zinc oxide whiskers, the content of the zinc oxide whiskers is 0.5-2 parts, and the zinc oxide whiskers constitute the core of the antistatic part of the coating, the zinc oxide whiskers can adjust the UV resistance of the coating and avoid the problem of premature cracking of the coating due to sunlight exposure.

[0041] As a further solution of the present invention: a water-based epoxy resin composite moisture-resistant coating, the pH regulator is composed of triethanolamine and citric acid in a ratio of 2:1, and the pH value of the finished pH regulator is within the range of 8.5-9.2.

[0042] As a further solution of the present invention: a water-based epoxy resin composite moisture-resistant coating, the defoaming agent is composed of polyether-modified siloxane and mineral oil in a ratio of 3:1.

[0043] As a further solution of the present invention: a water-based epoxy resin composite moisture-resistant coating, the bentonite is sodium-based bentonite, and the bentonite is modified and alkalized with a sodium carbonate solution.

[0044] As a further solution of the present invention: a water-based epoxy resin composite moisture-resistant coating also includes a UV absorber, the UV absorber includes 2-phenylbenzimidazole-5-sulfonic acid, the content of the 2-phenylbenzimidazole-5-sulfonic acid is 0.1-0.5 parts, and the 2-phenylbenzimidazole-5-sulfonic acid constitutes the core of the UV protection part of the coating.

[0045] Working principle: Since the main ingredients include 40-60 parts of water-based epoxy resin emulsion, 20-30 parts of water-based amine curing agent, 8-15 parts of bentonite and 5-10 parts of nano-silica, and the main ingredients constitute the core of the moisture-resistant part of the coating, the main ingredients have good moisture-proof performance and moisture-proof effect;

[0046] Since the auxiliary materials include 10-15 parts of propylene glycol methyl ether acetate and 15-25 parts of deionized water, and the auxiliary materials constitute the core of the additional functions of the coating, the addition of propylene glycol methyl ether acetate and 15-25 parts of deionized water to the coating can activate the bentonite in the main material and accelerate the synthesis speed of the coating;

[0047] Since the additives include 1-3 parts of KH-560 silane coupling agent, 0.8-2 parts of cellulose thickener, 0.5-1.5 parts of defoamer and 0.3-0.8 parts of pH regulator, and the additives constitute the core of the finished product part of the coating, the additives can be used to quickly synthesize and stabilize the coating, avoiding the problem of cracking or water loss of the coating;

[0048] Since the antistatic absorber includes zinc oxide whiskers, the content of the zinc oxide whiskers is 0.5-2 parts, and the zinc oxide whiskers constitute the core of the antistatic part of the coating, the zinc oxide whiskers can adjust the UV resistance of the coating and avoid the problem of premature cracking of the coating due to sunlight exposure.

[0049] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A waterborne epoxy resin composite moisture-resistant coating, characterized in that: The coating comprises a main material, wherein the main material comprises 40-60 parts of a water-based epoxy resin emulsion, 20-30 parts of a water-based amine curing agent, 8-15 parts of bentonite and 5-10 parts of nano-silicon dioxide, and the main material constitutes the core of the moisture-resistant part of the coating; Auxiliary materials, comprising 10-15 parts of propylene glycol methyl ether acetate and 15-25 parts of deionized water, the auxiliary materials forming the core of the additional function of the coating; as well as The additives include 1-3 parts of KH-560 silane coupling agent, 0.8-2 parts of cellulose thickener, 0.5-1.5 parts of defoaming agent and 0.3-0.8 parts of pH regulator, and the additives constitute the core of the finished product part of the coating.

2. A waterborne epoxy resin composite moisture-resistant coating according to claim 1, characterized in that: The waterborne epoxy resin emulsion is a copolymer of bisphenol A epoxy resin and polyvinyl alcohol glycidyl ether, with an epoxy equivalent of 300-400 g / eq and a solid content of 50±2%.

3. A waterborne epoxy resin composite moisture-resistant coating according to claim 2, characterized in that: The mass ratio of the nano-silica to the bentonite is 1:1.5-2.5, and the two are pre-dispersed at a rotation speed of 1200 rpm for 30 minutes.

4. A waterborne epoxy resin composite moisture-resistant coating according to claim 3, characterized in that: The invention also comprises an antistatic absorber, which comprises zinc oxide whisker. The content of the zinc oxide whisker is 0.5-2 parts, and the zinc oxide whisker constitutes the core of the antistatic part of the coating.

5. A waterborne epoxy resin composite moisture-resistant coating according to claim 4, characterized in that: The pH regulator is composed of triethanolamine and citric acid in a ratio of 2:1, and the pH value of the finished pH regulator is within the range of 8.5-9.

2.

6. The waterborne epoxy resin composite moisture-resistant coating according to claim 5, characterized in that: The defoamer is composed of polyether-modified silicone and mineral oil in a ratio of 3:

1.

7. The waterborne epoxy resin composite moisture-resistant coating according to claim 6, characterized in that: The bentonite is sodium bentonite, and the bentonite is modified and alkalized by a sodium carbonate solution.

8. The waterborne epoxy resin composite moisture-resistant coating according to claim 7, characterized in that: The invention also includes an ultraviolet absorber, which includes 2-phenylbenzimidazole-5-sulfonic acid. The content of the 2-phenylbenzimidazole-5-sulfonic acid is 0.1-0.5 parts. The 2-phenylbenzimidazole-5-sulfonic acid constitutes the core of the ultraviolet protection part of the coating.

9. A waterborne epoxy resin composite moisture-resistant coating and a production method thereof according to claim 8, characterized in that: include Step S1: adding water-based epoxy resin emulsion, water-based amine curing agent, bentonite and nano-silica into a blender and stirring and mixing to prepare a main material; Step S2: adding the main material, propylene glycol methyl ether acetate, and deionized water into an ultrasonic slurry pretreatment machine, and performing ultrasonic pretreatment at 60° C. in an ultrasonic environment to remove the mineral film on the surface of the material, and then flotating and discarding the trivalent and divalent iron ions in the slurry to obtain an effective slurry; Step S3: adding the additive to the effective slurry and mixing and stirring to prepare a coating; Step S4: packaging and shipment.

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