Novel waterproof and moistureproof coating and preparation process thereof

Abstract

The invention relates to the field of coatings, and discloses a novel waterproof and moistureproof coating and a preparation process thereof.The novel waterproof and moistureproof coating is prepared from 40%-50% of acrylic emulsion, 5%-10% of organosilicon waterproofing agent, 20%-30% of filler, 5%-10% of pigment and the balance auxiliaries, the filler comprises calcium carbonate and talcum powder, and the auxiliaries comprise a dispersing agent, a defoaming agent and a thickening agent; the calcium carbonate and the talcum powder not only increase the strength and stability of the coating, but also have hygroscopicity, can adjust the humidity around a base layer, and are matched with the thickening agent and other auxiliaries to further enhance the moisture-proof function. Through the synergistic effect of the acrylic emulsion and the organic silicon waterproof agent, a continuous and compact waterproof film can be formed on the surface of a base layer, moisture permeation is effectively prevented, and the problem that the polyurethane waterproof coating is prone to leakage after being eroded by moisture for a long time is solved; and the organic silicon waterproof agent can further enhance the waterproof performance, so that the coating can keep an excellent waterproof effect in various environments.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, in particular to a novel waterproof and moisture-proof coating and a preparation process thereof. Background Art

[0002] During the construction process, in order to ensure the quality of the building and prevent it from being corroded by rain or moisture, waterproof and moisture-proof paint is usually applied to designated locations to achieve the effect of protecting the building itself.

[0003] Common waterproof and moisture-proof coatings include polyurethane waterproof coatings, acrylic waterproof coatings, cement-based penetrating crystalline waterproof coatings, etc. Polyurethane waterproof coatings are widely used in basements, roofs, bathrooms and other locations due to their excellent elasticity and durability.

[0004] Considering the limited performance of existing waterproof and moisture-proof coatings, such as polyurethane waterproof coatings, they are prone to leakage after being eroded by water for a long time. This is because their film-forming properties are poor and they cannot form a continuous and dense waterproof film, allowing moisture to gradually penetrate into the base layer. Secondly, the existing waterproof and moisture-proof coatings are not ideal in terms of moisture resistance. They often cannot effectively regulate the humidity around the base layer, resulting in mold growth and moisture damage inside buildings in a humid environment. Therefore, the development of a new waterproof and moisture-proof coating and preparation process has important practical significance and broad market prospects. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a novel waterproof and moisture-proof coating and a preparation process, which solves the problem that polyurethane waterproof coatings are prone to leakage after being eroded by water for a long time.

[0006] To achieve the above objectives, the present invention is implemented through the following technical scheme: a new waterproof and moisture-proof coating, including 40%-50% acrylic emulsion, 5%-10% silicone waterproofing agent, 20%-30% filler, 5%-10% pigment, and additives supplemented to 100%.

[0007] Preferably, the filler includes calcium carbonate and talc.

[0008] Preferably, the auxiliary agent includes a dispersant, a defoamer and a thickener.

[0009] A preparation process of a novel waterproof and moisture-proof coating comprises the following steps:

[0010] S1. Prepare raw materials: accurately weigh acrylic emulsion, silicone waterproofing agent, calcium carbonate, talcum powder, pigment, dispersant, defoamer, thickener and other additives according to the formula;

[0011] S2. Mixing and dispersing: Mix and stir the materials to mix various raw materials;

[0012] S3. Grinding and refining: taking out the mixed material and grinding it;

[0013] S4. Adjusting properties: adding additives and auxiliary materials to the ground material;

[0014] S5. Filtration and storage: Filter the prepared coating through a filter, and package and store the filtered coating.

[0015] Preferably, in step S2, the specific mixing steps are: pouring the acrylic emulsion into a high-speed disperser; adding calcium carbonate and talcum powder fillers in sequence, starting the disperser, and stirring at a speed of 1000-1500 rpm to evenly disperse the filler in the emulsion. This process usually lasts for 20-30 minutes to ensure that the filler is fully moistened and evenly mixed with the emulsion; slowly adding the pigment and continuing to stir to evenly disperse the pigment to avoid pigment agglomeration. The stirring time is about 15-20 minutes.

[0016] Preferably, in step S3, the specific grinding step is: grinding the mixed and dispersed coating through a sand mill, wherein the grinding medium in the sand mill grinds the coating under high-speed rotation to make the particles in the coating finer, thereby improving the fineness and stability of the coating, wherein the grinding medium in the sand mill includes zirconium oxide beads; controlling the rotation speed and feed speed of the sand mill to ensure the grinding effect, and the general grinding time is 1-2 hours.

[0017] Preferably, in step S4, the specific steps of adding additives and auxiliary materials are: adding an organosilicon waterproofing agent and stirring evenly. The organosilicon waterproofing agent can enhance the waterproof performance of the coating, so that it forms a denser waterproof film after drying, and the stirring time is about 10-15 minutes; adding auxiliary agents such as dispersants, defoamers and thickeners in sequence. The dispersant helps to further improve the dispersibility of fillers and pigments; the defoamer is responsible for eliminating bubbles generated by the coating during the stirring process to ensure the quality of the coating; the thickener is responsible for adjusting the viscosity of the coating to make it suitable for different construction methods.

[0018] Preferably, in step S5, the specific filtering and storage steps are: filtering the prepared coating through a filter to remove impurities and incompletely dispersed particles that may exist therein, the pore size of the filter is generally 100-200 mesh, and placing the filtered coating into a sealed container for packaging and storage.

[0019] Preferably, the specific sealed container includes a metal barrel, a plastic barrel, or a sealed bag.

[0020] An application of a new waterproof and moisture-proof coating, as described in any one of claims 1 to 3, is applied in the construction field, especially in the basement waterproof and moisture-proof field and the roof waterproof field.

[0021] The present invention provides a novel waterproof and moisture-proof coating and a preparation process thereof. It has the following beneficial effects:

[0022] 1. The present invention can form a continuous and dense waterproof film on the surface of the base layer through the synergistic effect of acrylic emulsion and silicone waterproofing agent, effectively preventing water penetration, and solving the problem that polyurethane waterproof coatings are prone to leakage after being eroded by water for a long time. Among them, acrylic emulsion has good film-forming properties, and silicone waterproofing agent can further enhance the waterproof performance, so that the coating can maintain excellent waterproof effect in various environments.

[0023] 2. The present invention increases the strength and stability of the coating by using calcium carbonate and talcum powder, and also has a certain hygroscopicity. In a humid environment, the filler can absorb part of the moisture, reduce the humidity around the base layer, and reduce the risk of mold growth and damage to objects due to moisture. At the same time, the thickener in the additive can adjust the viscosity of the coating, so that it forms a tighter structure during the drying process, further enhancing the moisture-proof performance.

[0024] 3. The present invention achieves rapid solidification while maintaining good waterproof performance by adding quick-drying agent and nano-silicon dioxide, thereby improving construction efficiency. At the same time, nano-silicon dioxide also enhances the strength and stability of the coating, making it suitable for projects with high construction period requirements such as emergency repairs.

[0025] 4. The present invention has excellent flame retardant and high temperature resistance properties by adding flame retardants, mica powder and glass fiber, can provide reliable waterproof and moisture-proof protection for buildings in high temperature environments, effectively prevent the occurrence of fire and the influence of high temperature on the performance of coatings, and improve the durability and applicability of coatings.

[0026] 5. The present invention provides efficient anti-rust protection for the metal substrate by utilizing the synergistic effect of rust inhibitor, zinc powder and aluminum tripolyphosphate, combines the waterproof and moisture-proof properties of acrylic emulsion and silicone waterproofing agent, reduces the risk of metal rust, enhances the adhesion between the coating and the metal substrate, and is environmentally friendly and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a stereogram of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1:

[0030] Please see attached Figure 1 The embodiment of the present invention provides a novel waterproof and moisture-proof coating, comprising 40% acrylic emulsion, 10% silicone waterproofing agent, 20% filler, 10% pigment, and additives up to 100%

[0031] The filler includes calcium carbonate and talcum powder, and the auxiliary agent includes a dispersant, a defoamer and a thickener.

[0032] A preparation process of a novel waterproof and moisture-proof coating comprises the following steps:

[0033] S1. Prepare raw materials: accurately weigh acrylic emulsion, silicone waterproofing agent, calcium carbonate, talcum powder, pigment, dispersant, defoamer, thickener and other additives according to the formula;

[0034] S2. Mixing and dispersion:

[0035] Pour the acrylic emulsion into a high-speed disperser;

[0036] Add calcium carbonate and talcum powder fillers in turn, start the disperser, and stir at an appropriate speed (1500 rpm) to evenly disperse the fillers in the emulsion. This process usually lasts 30 minutes to ensure that the fillers are fully wetted and evenly mixed with the emulsion;

[0037] Add the pigment slowly and continue stirring to evenly disperse the pigment and avoid pigment clumping.

[0038] The stirring time is about 20 minutes;

[0039] S3. Grinding and refining:

[0040] The mixed and dispersed coating is ground by a sand mill, wherein the grinding medium in the sand mill grinds the coating under high-speed rotation to make the particles in the coating finer and improve the fineness and stability of the coating, wherein the grinding medium in the sand mill includes zirconium oxide beads;

[0041] Control the speed and feed rate of the sand mill to ensure the grinding effect. The general grinding time is 2 hours;

[0042] S4. Adjust performance:

[0043] Add silicone waterproofing agent and stir evenly. The silicone waterproofing agent can enhance the waterproof performance of the coating and form a denser waterproof film after drying. The stirring time is about 15 minutes;

[0044] Add dispersants, defoamers, thickeners and other additives in sequence. Dispersants help to further improve the dispersibility of fillers and pigments; defoamers are responsible for eliminating bubbles generated during the mixing process of the paint to ensure the quality of the paint; thickeners are responsible for adjusting the viscosity of the paint to make it suitable for different construction methods;

[0045] S5. Filtration and storage: Filter the prepared coating through a filter to remove possible impurities and incompletely dispersed particles. The pore size of the filter is generally 200 mesh. Put the filtered coating into a sealed container for packaging and storage.

[0046] Beneficial effects of Example 1: By using a high proportion of acrylic emulsion combined with a silicone waterproofing agent, a continuous and dense waterproof film can be formed on the surface of the base layer, effectively preventing water penetration and greatly improving the waterproof performance. At the same time, the calcium carbonate and talcum powder in the filler not only increase the strength and stability of the coating, but also have hygroscopicity, which can adjust the humidity around the base layer, and cooperate with additives such as thickeners to further enhance the moisture-proof function.

[0047] Embodiment 2: A novel quick-drying waterproof and moisture-proof coating comprises 45% acrylic emulsion, 5% silicone waterproofing agent, 15% calcium carbonate, 12% talcum powder, 5% pigment, 5% quick-drying agent, 4% nano-silicon dioxide, and additives supplemented to 100%.

[0048] Example 2 Beneficial Effects: By adding quick-drying agent and nano-silicon dioxide, rapid solidification is achieved while maintaining good waterproof performance, thereby improving construction efficiency. Nano-silicon dioxide also enhances the strength and stability of the coating, making it suitable for projects with high construction period requirements such as emergency repairs, while having good leveling and adhesion, and is easy to construct.

[0049] Embodiment 3: A novel flame retardant, waterproof and moisture-proof coating, comprising 48% acrylic emulsion, 9% silicone waterproofing agent, 18% calcium carbonate, 10% talcum powder, 10% mica powder, 5% pigment, 5% flame retardant, 5% glass fiber, and additives supplemented to 100%.

[0050] Beneficial effects of Example 3: By adding flame retardants, mica powder and glass fiber, it has excellent flame retardant and high temperature resistance, can provide reliable waterproof and moisture-proof protection for buildings in high temperature environments, effectively prevent the occurrence of fire and the impact of high temperature on coating performance, and improve the durability and applicability of the coating.

[0051] Embodiment 4: A novel anti-rust, waterproof and moisture-proof coating comprises 43% acrylic emulsion, 5% silicone waterproofing agent, 15% calcium carbonate, 12% talcum powder, 5% pigment, 3% rust inhibitor, 2% zinc powder, 2% aluminum tripolyphosphate, and additives supplemented to 100%.

[0052] Beneficial effect of Example 4: The synergistic effect of rust inhibitor, zinc powder and aluminum tripolyphosphate is utilized to provide efficient anti-rust protection for the metal base layer. The waterproof and moisture-proof properties of acrylic emulsion and silicone waterproofing agent are combined to reduce the risk of metal rust, enhance the adhesion of the coating to the metal base layer, and is environmentally friendly and safe.

[0053] Comparative experiment 1: Solidification time comparison experiment

[0054] Experimental purpose: To compare the setting time of the coatings in the four embodiments

[0055] Experimental materials: 10 groups of coatings of Examples 1 to 4, and 40 groups of smear plates of the same size.

[0056] Experimental steps:

[0057] The coating of Example 1 was evenly applied on 10 groups of application plates, and the start time was recorded.

[0058] The coatings of Example 2, Example 3 and Example 4 were applied to another 30 groups of identical smearing plates in sequence, and the start time of each was recorded.

[0059] Observe the solidification state of the paint on the four smear plates at regular intervals (5 minutes) until the paint is completely solidified, and record the end time of each.

[0060] Experimental data:

[0061] The complete solidification time of Example 1 is 60 minutes, that of Example 2 is 30 minutes, that of Example 3 is 45 minutes, and that of Example 4 is 50 minutes.

[0062]

[0063] Comparative experiment 2: Flame retardant performance comparison experiment

[0064] Experimental purpose: To compare the flame retardant properties of coatings in four examples

[0065] Experimental materials: 10 groups of coatings of Examples 1 to 4, a fire source (lighter), and 40 groups of wooden boards of the same material.

[0066] Experimental steps:

[0067] The coating of Example 1 was applied on 10 groups of wooden boards. After drying, the boards were placed close to a fire source to observe the burning of the coating, and the burning time and degree of burning were recorded.

[0068] The same operation is performed on the wood boards treated in Example 2, Example 3 and Example 4.

[0069] Experimental data:

[0070] The wooden board of Example 1 started to burn within 15 seconds after approaching the fire source, and half of the board was burned after 2 minutes of continuous burning. The wooden board of Example 2 started to have open flames 25 seconds after approaching the fire source, and the board was partially burnt after 1 minute and 30 seconds of continuous burning. The wooden board of Example 3 started to have weak flames 40 seconds after approaching the fire source, and only the surface changed color slightly after 1 minute of continuous burning. The wooden board of Example 4 started to produce smoke 30 seconds after approaching the fire source, and had a small amount of scorch marks after 1 minute and 40 seconds of continuous burning.

[0071]

[0072] Comparative experiment 3: Waterproof performance comparison experiment

[0073] Experimental purpose: To compare the waterproof performance of coatings in four embodiments.

[0074] Experimental materials: 10 groups of coatings of the four embodiments, containers of the same size (capable of holding water), and 40 groups of test blocks of the same material.

[0075] Experimental steps:

[0076] The coatings of the four embodiments were applied on different test blocks respectively, and after drying, they were placed in containers containing the same amount of water.

[0077] Observe the state of the test block in water, and record the time when immersion begins and the time when water seepage occurs.

[0078] Experimental data:

[0079] Example 1 had slight water seepage after immersion for 48 hours, Example 2 had slight water seepage after 52 hours, Example 3 had slight water seepage after 55 hours, and Example 4 had no water seepage after immersion for 60 hours.

[0080]

[0081]

[0082] Comparative experiment 4: Anti-rust performance comparison experiment

[0083] Experimental purpose: To compare the anti-rust performance of coatings in four embodiments.

[0084] Experimental materials: 10 groups of coatings of Examples 1 to 4, 40 groups of metal test pieces of the same material, and a humid environment simulation device (a closed box with high humidity).

[0085] Experimental steps:

[0086] The coating of Example 1 was applied on 10 groups of metal test pieces, and the coatings of Example 2, Example 3, and Example 4 were applied on another 30 groups of metal test pieces respectively.

[0087] Place four test pieces into the humid environment simulation device at the same time.

[0088] Observe the rust condition of the metal test piece at regular intervals (3 days) and record the rust time.

[0089] Experimental data:

[0090] The metal test piece of Example 1 began to rust after 15 days, the metal test piece of Example 2 began to rust after 20 days, the metal test piece of Example 3 began to rust after 23 days, and the metal test piece of Example 4 began to rust slightly after 30 days.

[0091]

[0092] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new waterproof and moisture-proof coating, characterized in that: It includes 40% - 50% acrylic emulsion, 5% - 10% silicone waterproofing agent, 20% - 30% filler, 5% - 10% pigment, and additives up to 100%.

2. A novel waterproof and moisture-proof coating according to claim 1, characterized in that: The filler includes calcium carbonate and talc.

3. A novel waterproof and moisture-proof coating according to claim 1, characterized in that: The auxiliary agents include dispersants, defoamers and thickeners.

4. The preparation process of a novel waterproof and moisture-proof coating according to claim 1, characterized in that: The following steps are involved: S1. Prepare raw materials: accurately weigh acrylic emulsion, silicone waterproofing agent, calcium carbonate, talcum powder, pigment, dispersant, defoamer, and thickener according to the formula; S2. Mixing and dispersing: Mix and stir the materials to mix various raw materials; S3. Grinding and refining: taking out the mixed material and grinding it; S4. Adjusting properties: Adding additives and auxiliary materials to the ground material; S5. Filtration and storage: Filter the prepared coating through a filter, and package and store the filtered coating.

5. A novel waterproof and moisture-proof coating and preparation process according to claim 4, characterized in that: In step S2, the specific mixing steps are: pouring the acrylic emulsion into a high-speed disperser; adding calcium carbonate and talcum powder fillers in sequence, starting the disperser, and stirring at a speed of 1000-1500 rpm to evenly disperse the filler in the emulsion. This process usually lasts for 20-30 minutes to ensure that the filler is fully moistened and evenly mixed with the emulsion; slowly adding the pigment and continuing to stir to evenly disperse the pigment to avoid pigment agglomeration. The stirring time is about 15-20 minutes.

6. A novel waterproof and moisture-proof coating and preparation process according to claim 4, characterized in that: In step S3, the specific grinding steps are: grinding the mixed and dispersed coating through a sand mill, grinding the coating with a grinding medium in the sand mill under high-speed rotation to make the particles in the coating finer, thereby improving the fineness and stability of the coating, wherein the grinding medium in the sand mill includes zirconium oxide beads; controlling the rotation speed and feed speed of the sand mill to ensure the grinding effect, and generally the grinding time is 1-2 hours.

7. A novel waterproof and moisture-proof coating and preparation process according to claim 4, characterized in that: In step S4, the specific steps of adding additives and auxiliary materials are: adding an organosilicon waterproofing agent and stirring evenly. The organosilicon waterproofing agent can enhance the waterproof performance of the coating, so that it forms a denser waterproof film after drying. The stirring time is about 10-15 minutes; adding a dispersant, a defoamer and a thickener in sequence. The dispersant helps to further improve the dispersibility of fillers and pigments; the defoamer is responsible for eliminating bubbles generated during the stirring process of the coating to ensure the quality of the coating; the thickener is responsible for adjusting the viscosity of the coating to make it suitable for different construction methods.

8. A novel waterproof and moisture-proof coating and preparation process according to claim 4, characterized in that: In step S5, the specific filtering and storage steps are: filtering the prepared coating through a filter to remove possible impurities and incompletely dispersed particles therein, wherein the pore size of the filter is generally 100-200 mesh, and placing the filtered coating into a sealed container for packaging and storage.

9. A novel waterproof and moisture-proof coating and preparation process according to claim 8, characterized in that: The specific sealed containers include metal barrels, plastic barrels, and sealed bags.

10. Application of a new waterproof and moisture-proof coating, characterized in that: A novel waterproof and moisture-proof coating as described in any one of claims 1 to 3 is used in the construction field, especially in the basement waterproof and moisture-proof field and the roof waterproof field.

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