Highly adhesive waterborne inorganic quick-drying paint and its application method

Abstract

The present application relates to a kind of high adhesive aqueous inorganic quick-drying paint, including powder and water, powder includes by weight parts: Portland cement 40-50 parts, quartz sand 36-44 parts, modified polyester fiber 0.3-0.9 parts, modified quartz sand 4-6 parts, dispersible latex powder 1-3 parts, defoaming agent 0.2-0.3 parts, cellulose ether 0.1-0.2 parts, heavy calcium carbonate 5-6 parts, sulphoaluminate cement 0.5-1 part, water reducing agent 0.1-0.2 parts;Modified polyester fiber is wet modification treatment to polyester fiber using silane coupling agent;Modified quartz sand is wrapped treatment to quartz sand using hot melt polyester wax powder.The present application can improve the surface tension of polyester fiber by adding the polyester fiber modified by silane coupling agent, which is beneficial to the infiltration and expansion of asphaltic bituminous sheet on the surface of coating during construction, so that the two can be better bonded.

Description

Technical Field

[0001] This invention relates to the field of waterproof coating technology, and in particular to a high-adhesion water-based inorganic fast-drying coating and its application method. Background Technology

[0002] With increasingly stringent market requirements for waterproofing grades and rising demands for building waterproofing, the combined use of waterproofing coatings and waterproofing membranes is becoming more common. However, existing water-based inorganic waterproofing coatings combined with oil-based bitumen membranes often suffer from poor interlayer adhesion and long construction times due to differences in material properties, requiring further improvement.

[0003] In view of this, the present invention is hereby proposed. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a high-adhesion water-based inorganic fast-drying coating and its application method.

[0005] The technical solution adopted in this invention is as follows:

[0006] This invention provides a high-adhesion water-based inorganic fast-drying coating, comprising powder and water, wherein the powder comprises, by weight:

[0007] The ingredients are: 40-50 parts silicate cement, 36-44 parts quartz sand, 0.3-0.9 parts modified polyester fiber, 4-6 parts modified quartz sand, 1-3 parts dispersible latex powder, 0.2-0.3 parts defoamer, 0.1-0.2 parts cellulose ether, 5-6 parts heavy calcium carbonate, 0.5-1 part sulfur-aluminum cement, and 0.1-0.2 parts water-reducing agent.

[0008] The modified polyester fiber is obtained by wet modification of polyester fiber with silane coupling agent.

[0009] The modified quartz sand is prepared by coating the quartz sand with hot-melt polyester wax powder.

[0010] This invention proposes a high-adhesion water-based inorganic fast-drying coating. By adding polyester fibers modified with a silane coupling agent to the powder, the surface tension of the polyester fibers is increased, which is beneficial for the wetting and spreading of the asphalt membrane on the coating surface during construction, resulting in better adhesion between the two. Simultaneously, by introducing quartz sand coated with polyester wax powder, the coating has a larger oleophilicity and bonding contact area, significantly improving the adhesion between the coating and the asphalt membrane; furthermore, it effectively improves the coating's workability and shortens the construction time.

[0011] Preferably, the mass ratio of the silane coupling agent to the polyester fiber is 0.25-2.5:1.

[0012] Preferably, the silane coupling agent is KH560;

[0013] The polyester fiber has a length of 5-10 mm.

[0014] Preferably, the polyester wax powder is PET wax powder or bio-based polymer micro wax powder, and the melting point of the polyester wax powder is 140-180℃.

[0015] Preferably, the mass ratio of the polyester wax powder to the quartz sand in the modified quartz sand is 0.01-0.02:1.

[0016] Preferably, the silicate cement is P.O42.5 ordinary silicate cement;

[0017] The particle size of the quartz sand is 70-140 mesh;

[0018] The dispersible latex powder is an acrylate-styrene copolymer powder;

[0019] The cellulose ether is hydroxypropyl methylcellulose ether;

[0020] The particle size of the heavy calcium carbonate is 200-300 mesh.

[0021] Another aspect of the present invention provides a method for applying a high-adhesion water-based inorganic fast-drying coating as described in any of the above technical solutions, comprising the following steps:

[0022] S1. Mix all components in the powder except the modified quartz sand evenly, and denot it as powder A. Mix powder A with water and stir to obtain cement mortar.

[0023] S2. Apply the cement mortar to the concrete surface, then sprinkle the modified quartz sand on top, and simultaneously cover with wet-laid asphalt roll material.

[0024] Preferably, in step S1, the mass ratio of powder A to water is 100:20-25.

[0025] Preferably, in step S1, the stirring rate is 800-1000 r / min and the stirring time is 1-3 min.

[0026] This invention utilizes the gravity effect of modified quartz sand to partially embed it into the voids formed by cement mortar before wet-laying asphalt rolls. This method improves the bonding contact surface between the asphalt rolls and the coating (including the contact between the asphalt rolls and the modified quartz sand and cement mortar). It overcomes the problems of existing methods that only apply a layer of wax powder to the entire surface of the coating, making the adhesion between the asphalt rolls and the coating rely solely on the adhesive force of the wax powder itself, resulting in insufficient interlayer adhesion and poor workability. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments.

[0028] On one hand, embodiments of the present invention provide a high-adhesion water-based inorganic fast-drying coating, comprising powder and water, wherein the powder comprises, by weight:

[0029] The ingredients are: 40-50 parts silicate cement, 36-44 parts quartz sand, 0.3-0.9 parts modified polyester fiber, 4-6 parts modified quartz sand, 1-3 parts dispersible latex powder, 0.2-0.3 parts defoamer, 0.1-0.2 parts cellulose ether, 5-6 parts heavy calcium carbonate, 0.5-1 part sulfur-aluminum cement, and 0.1-0.2 parts water-reducing agent.

[0030] The modified polyester fiber is produced by wet modification of polyester fiber using a silane coupling agent.

[0031] Modified silica sand is made by coating silica sand with hot-melt polyester wax powder.

[0032] This invention provides a typical method for preparing modified polyester fibers, comprising the following steps: diluting a silane coupling agent with water to prepare a 0.1-1 wt% silane coupling agent aqueous solution, then immersing the polyester fibers in the solution and stirring for 30 minutes, removing the fibers, and drying them at 110-120°C for 5-10 minutes. Additionally, this invention also provides a typical method for preparing modified quartz sand, comprising the following steps: spraying polyester wax powder, which has been melted into a liquid at 180-185°C, under pressure onto quartz sand stirred at 1000-1200 r / min, and then cooling the sand.

[0033] In a preferred embodiment of the present invention, the mass ratio of silane coupling agent to polyester fiber is 0.25-2.5:1.

[0034] In a preferred embodiment of the present invention, the silane coupling agent is KH560;

[0035] The length of the polyester fiber is 5-10mm.

[0036] In a preferred embodiment of the present invention, the polyester wax powder is PET wax powder or bio-based polymer microwax powder, and the melting point of the polyester wax powder is 140-180℃. In this invention, selecting polyester wax powder with a melting point of 140-180℃ ensures the operability of the hot-melt spraying process and prevents excessive melting due to heat absorption by the asphalt roll material after construction. More preferably, the polyester wax powder is a bio-based polymer microwax powder; for example, BYK's Ceraflour 1000 can be used.

[0037] In a preferred embodiment of the present invention, the mass ratio of polyester wax powder to quartz sand in the modified quartz sand is 0.01-0.02:1.

[0038] In a preferred embodiment of the present invention, the silicate cement is P.O42.5 ordinary silicate cement;

[0039] The particle size of quartz sand is 70-140 mesh;

[0040] The dispersible latex powder is an acrylic-styrene copolymer powder;

[0041] The cellulose ether is hydroxypropyl methylcellulose ether;

[0042] The particle size of heavy calcium carbonate is 200-300 mesh.

[0043] On the other hand, embodiments of the present invention also provide a method for applying high-adhesion water-based inorganic fast-drying coatings according to any of the above technical solutions, comprising the following steps:

[0044] S1. Mix all components in the powder except modified quartz sand evenly, and denote it as powder A. Mix powder A with water to obtain cement mortar.

[0045] S2. Apply cement mortar to the concrete surface, then sprinkle modified quartz sand, and simultaneously cover with wet-laid asphalt roll material.

[0046] In a preferred embodiment of the present invention, in step S1, the mass ratio of powder A to water is 100:20-25.

[0047] In a preferred embodiment of the present invention, in step S1, the stirring rate is 800-1000 r / min and the stirring time is 1-3 min.

[0048] Example 1

[0049] A high-adhesion water-based inorganic fast-drying coating comprises powder and water, wherein the powder comprises, by weight:

[0050] 45 parts of silicate cement (P.O42.5 ordinary silicate cement), 40 parts of quartz sand (70-140 mesh), 0.3 parts of modified polyester fiber, 5.05 parts of modified quartz sand, 3 parts of dispersible latex powder (acrylate-styrene copolymer powder), 0.2 parts of defoamer, 0.1 parts of cellulose ether (hydroxypropyl methylcellulose ether), 5.75 parts of heavy calcium carbonate (200-300 mesh), 0.5 parts of sulfur-aluminum cement, and 0.1 parts of water-reducing agent.

[0051] The modified polyester fiber is prepared by wet modification of polyester fiber with silane coupling agent (KH560), and the mass ratio of silane coupling agent to polyester fiber is 0.5:1. The specific steps include: diluting the silane coupling agent with water to prepare a 1wt% silane coupling agent aqueous solution, then immersing a 7mm long polyester fiber in the solution and stirring for 30 minutes, removing it, and drying it at 115℃ for 10 minutes.

[0052] Modified silica sand is produced by coating silica sand (70-140 mesh) with hot-melt polyester wax powder (bio-based polymer micro-wax powder, melting point 170℃), with a mass ratio of polyester wax powder to silica sand of 0.01:1. The specific steps include: hot-melt polyester wax powder (liquid at 180℃) is sprayed under pressure onto silica sand stirred at 1200 r / min, and then cooled.

[0053] The construction is carried out using the following methods, including the following steps:

[0054] S1. Mix all components in the powder except modified quartz sand evenly, and denote it as powder A. Mix powder A with water at a mass ratio of 100:25, stir at a stirring speed of 800 r / min, and stir for 2 min to obtain cement mortar.

[0055] S2. Apply cement mortar to the concrete surface (5mm thick), then sprinkle modified quartz sand, and simultaneously cover with wet-laid asphalt roll material.

[0056] Example 2

[0057] The difference between this embodiment and Embodiment 1 is that the amounts of each component in the powder are different.

[0058] A high-adhesion water-based inorganic fast-drying coating comprises powder and water, wherein the powder comprises, by weight:

[0059] The ingredients are: 45 parts silicate cement, 40 parts quartz sand, 0.5 parts modified polyester fiber, 5.05 parts modified quartz sand, 3 parts dispersible latex powder, 0.2 parts defoamer, 0.1 parts cellulose ether, 5.55 parts heavy calcium carbonate, 0.5 parts sulfur aluminum cement, and 0.1 parts water-reducing agent.

[0060] The modified polyester fiber was prepared by wet modification of the polyester fiber using a silane coupling agent, with a mass ratio of silane coupling agent to polyester fiber of 1.5:1. The specific preparation method is the same as in Example 1.

[0061] The modified silica sand was prepared by coating silica sand with hot-melt polyester wax powder, with a mass ratio of polyester wax powder to silica sand of 0.01:1. The specific preparation method is the same as in Example 1.

[0062] The construction method is the same as in Example 1.

[0063] Example 3

[0064] The difference between this embodiment and Embodiment 1 is that the amounts of each component in the powder are different.

[0065] A high-adhesion water-based inorganic fast-drying coating comprises powder and water, wherein the powder comprises, by weight:

[0066] The ingredients are: 45 parts silicate cement, 40 parts quartz sand, 0.6 parts modified polyester fiber, 5.05 parts modified quartz sand, 3 parts dispersible latex powder, 0.2 parts defoamer, 0.1 parts cellulose ether, 5.45 parts heavy calcium carbonate, 0.5 parts sulfur aluminum cement, and 0.1 parts water-reducing agent.

[0067] The modified polyester fiber was prepared by wet modification of the polyester fiber with a silane coupling agent, and the mass ratio of the silane coupling agent to the polyester fiber was 1:1. The specific preparation method is the same as in Example 1.

[0068] The modified silica sand was prepared by coating silica sand with hot-melt polyester wax powder, with a mass ratio of polyester wax powder to silica sand of 0.01:1. The specific preparation method is the same as in Example 1.

[0069] The construction method is the same as in Example 1.

[0070] Example 4

[0071] The difference between this embodiment and Embodiment 1 is that the amounts of each component in the powder are different.

[0072] A high-adhesion water-based inorganic fast-drying coating comprises powder and water, wherein the powder comprises, by weight:

[0073] The ingredients are: 45 parts silicate cement, 40 parts quartz sand, 0.6 parts modified polyester fiber, 5.1 parts modified quartz sand, 3 parts dispersible latex powder, 0.2 parts defoamer, 0.1 parts cellulose ether, 5.4 parts heavy calcium carbonate, 0.5 parts sulfur aluminum cement, and 0.1 parts water-reducing agent.

[0074] The modified polyester fiber was prepared by wet modification of the polyester fiber with a silane coupling agent, and the mass ratio of the silane coupling agent to the polyester fiber was 1:1. The specific preparation method is the same as in Example 1.

[0075] The modified quartz sand was prepared by coating quartz sand with hot-melt polyester wax powder, with a mass ratio of polyester wax powder to quartz sand of 0.02:1. The specific preparation method is the same as in Example 1.

[0076] The construction method is the same as in Example 1.

[0077] Example 5

[0078] The difference between this embodiment and Embodiment 1 is that the amounts of each component in the powder are different.

[0079] A high-adhesion water-based inorganic fast-drying coating comprises powder and water, wherein the powder comprises, by weight:

[0080] The ingredients are: 45 parts silicate cement, 40 parts quartz sand, 0.9 parts modified polyester fiber, 5.1 parts modified quartz sand, 3 parts dispersible latex powder, 0.2 parts defoamer, 0.1 parts cellulose ether, 5.1 parts heavy calcium carbonate, 0.5 parts sulfur aluminum cement, and 0.1 parts water-reducing agent.

[0081] The modified polyester fiber was prepared by wet modification of the polyester fiber using a silane coupling agent, with a mass ratio of silane coupling agent to polyester fiber of 1.25:1. The specific preparation method is the same as in Example 1.

[0082] The modified quartz sand was prepared by coating quartz sand with hot-melt polyester wax powder, with a mass ratio of polyester wax powder to quartz sand of 0.02:1. The specific preparation method is the same as in Example 1.

[0083] The construction method is the same as in Example 1.

[0084] Comparative Example 1

[0085] The difference between this comparative example and Example 1 is that polyester wax powder is not used to modify the quartz sand, and silane coupling agent is not used to modify the polyester fiber. The reduced component dosage is made up with heavy calcium carbonate.

[0086] A water-based inorganic coating comprises powder and water, wherein the powder comprises, by weight:

[0087] 45 parts silicate cement, 45 parts quartz sand, 0.2 parts polyester fiber, 3 parts dispersible latex powder, 0.2 parts defoamer, 0.1 parts cellulose ether, 5.9 parts heavy calcium carbonate, 0.5 parts sulfur aluminum cement, and 0.1 parts water-reducing agent.

[0088] The construction is carried out using the following methods, including the following steps:

[0089] S1. Mix all components in the powder evenly, mix the powder and water at a mass ratio of 100:25, stir at a stirring speed of 800 r / min for 2 min to obtain cement mortar.

[0090] S2. Apply cement mortar to the concrete surface (5mm thick) and simultaneously cover with wet-laid asphalt roll material.

[0091] Comparative Example 2

[0092] The difference between this comparative example and Example 1 is that polyester wax powder is not used to modify the quartz sand, and the reduced amount of polyester wax powder is made up with heavy calcium carbonate.

[0093] A water-based inorganic coating comprises powder and water, wherein the powder comprises, by weight:

[0094] The ingredients are: 45 parts silicate cement, 45 parts quartz sand, 0.3 parts modified polyester fiber, 3 parts dispersible latex powder, 0.2 parts defoamer, 0.1 parts cellulose ether, 5.8 parts heavy calcium carbonate, 0.5 parts sulfur aluminum cement, and 0.1 parts water-reducing agent.

[0095] The modified polyester fiber was prepared by wet modification of the polyester fiber using a silane coupling agent, with a mass ratio of silane coupling agent to polyester fiber of 0.5:1. The specific preparation method is the same as in Example 1.

[0096] The construction method is the same as Comparative Example 1.

[0097] Comparative Example 3

[0098] The difference between this comparative example and Example 5 is that the form of adding polyester wax powder is changed (instead of using the polyester wax powder for hot-melt application to the quartz sand coating treatment, it is directly applied by hot-melt during construction).

[0099] A water-based inorganic coating comprises powder and water, wherein the powder comprises, by weight:

[0100] The ingredients are: 45 parts silicate cement, 45 parts quartz sand, 0.9 parts modified polyester fiber, 3 parts dispersible latex powder, 0.2 parts defoamer, 0.1 parts cellulose ether, 5.1 parts heavy calcium carbonate, 0.5 parts sulfur aluminum cement, 0.1 parts water-reducing agent, and 0.1 parts polyester wax powder.

[0101] The modified polyester fiber was prepared by wet modification of the polyester fiber using a silane coupling agent, with a mass ratio of silane coupling agent to polyester fiber of 1.25:1. The specific preparation method is the same as in Example 1.

[0102] The construction is carried out using the following methods, including the following steps:

[0103] S1. Mix all components in the powder except for the polyester wax powder evenly, and denote it as powder A. Mix powder A with water at a mass ratio of 100:25, stir at a stirring speed of 800 r / min, and stir for 2 min to obtain cement mortar.

[0104] S2. Apply cement mortar to the concrete surface (5mm thick). After the coating dries, apply hot melt polyester wax powder and simultaneously cover with wet-laid asphalt roll material.

[0105] The water-based inorganic coatings prepared in Examples 1-5 and Comparative Examples 1-3 were subjected to performance tests, with reference to the standard JCT2090-2011 "Polymer Cement Waterproofing Slurry". The results are recorded in Table 1.

[0106] Table 1

[0107]

[0108]

[0109] As shown in Table 1, the high-adhesion water-based inorganic quick-drying coatings of Examples 1-3 of this invention can effectively overcome the problems of poor adhesion between water-based inorganic coatings and asphalt rolls, long construction time intervals, and high construction limitations. Furthermore, they exhibit excellent mechanical properties, all exceeding standard values. Comparing Example 1 with Comparative Examples 1 and 2, it is evident that the addition of silane-modified polyester fibers improves the adhesion between the coating and the substrate and asphalt rolls, and enhances the coating's crack resistance. Sprinkling quartz sand treated with hot-melt polyester wax powder during construction significantly improves the adhesion strength between the coating and the substrate and asphalt rolls, as well as the coating's construction performance, and significantly shortens the construction time. Comparing Example 5 and Comparative Example 3, it is clear that using conventional hot-melt polyester wax powder construction methods significantly reduces the adhesion strength between the coating and asphalt rolls, prolonging the construction time; however, this invention effectively overcomes this problem.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-adhesion water-based inorganic fast-drying coating, comprising powder and water, characterized in that, The powder comprises, by weight: The ingredients are: 40-50 parts silicate cement, 36-44 parts quartz sand, 0.3-0.9 parts modified polyester fiber, 4-6 parts modified quartz sand, 1-3 parts dispersible latex powder, 0.2-0.3 parts defoamer, 0.1-0.2 parts cellulose ether, 5-6 parts heavy calcium carbonate, 0.5-1 part sulfur-aluminum cement, and 0.1-0.2 parts water-reducing agent. The modified polyester fiber is obtained by wet modification of polyester fiber with silane coupling agent. The modified quartz sand is prepared by coating the quartz sand with hot-melt polyester wax powder. The application method of the high-adhesion water-based inorganic fast-drying coating includes the following steps: S1. Mix all components in the powder except the modified quartz sand evenly, and denot it as powder A. Mix powder A with water and stir to obtain cement mortar. S2. Apply the cement mortar to the concrete surface, then sprinkle the modified quartz sand on top, and simultaneously cover with wet-laid asphalt roll material.

2. The high-adhesion water-based inorganic fast-drying coating as described in claim 1, characterized in that, The mass ratio of the silane coupling agent to the polyester fiber is 0.25-2.5:

1.

3. The high-adhesion water-based inorganic fast-drying coating as described in claim 1, characterized in that, The silane coupling agent is KH560; The polyester fiber has a length of 5-10 mm.

4. The high-adhesion water-based inorganic fast-drying coating as described in claim 1, characterized in that, The polyester wax powder is PET wax powder or bio-based polymer micro wax powder, and the melting point of the polyester wax powder is 140-180℃.

5. The high-adhesion water-based inorganic fast-drying coating as described in claim 1, characterized in that, The mass ratio of the polyester wax powder to the quartz sand in the modified quartz sand is 0.01-0.02:

1.

6. The high-adhesion water-based inorganic fast-drying coating as described in claim 1, characterized in that, The silicate cement is P.O42.5 ordinary silicate cement; The particle size of the quartz sand is 70-140 mesh; The dispersible latex powder is an acrylate-styrene copolymer powder; The cellulose ether is hydroxypropyl methylcellulose ether; The particle size of the heavy calcium carbonate is 200-300 mesh.

7. The high-adhesion water-based inorganic fast-drying coating as described in claim 1, characterized in that, In step S1, the mass ratio of powder A to water is 100:20-25.

8. The high-adhesion water-based inorganic fast-drying coating as described in claim 1, characterized in that, In step S1, the stirring rate is 800-1000 r / min and the stirring time is 1-3 min.

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