Colored waterproof material and preparation method thereof

Abstract

The invention relates to a colored waterproof material and a preparation method thereof. The colored waterproof material comprises a liquid material component and a powder material component, the weight ratio of the liquid material component to the powder material component is 1: (2.5-4); wherein the liquid material component comprises a color fixing agent, a butadiene-styrene copolymer emulsion and a waterborne aliphatic polyurethane hybrid modified epoxy emulsion; wherein the rheological auxiliary agent in the powder material component is a composition of beta type polymerized 6-deoxy-L-mannopyranose and calcium carbonate. The colored waterproof material prepared by the invention can improve the problems that the colored waterproof material is easy to saltpeter after construction, poor in flexibility and sometimes weak in color after construction. The paint not only has the advantages of good adhesion, flexibility and good color retention effect, but also has the advantages of environmental friendliness, excellent performance and low possibility of'saltpetering, floating and whitening 'after construction.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, and in particular to a colored waterproof material and a preparation method thereof. Background Art

[0002] In recent years, the domestic building materials industry has been growing and developing, and the division of the waterproofing field in the industry has become more and more detailed. For example, the polymer cement-based waterproofing field can be subdivided into JS waterproof coatings, waterproof slurries, mortars, etc. As consumers' awareness of waterproof materials increases, their requirements for products are also getting higher and higher. However, there are still many technical difficulties in the field of waterproof slurries. If they are not solved in a timely and effective manner, it is difficult to meet the needs of consumers. For example, the alkali problem after construction will cause the colorful appearance to appear "flowery", reducing the color rendering effect of the waterproof material; if the waterproof product has poor flexibility, it will not be able to adapt to slight vibrations and a certain degree of displacement of the building structure, and for uneven walls, holes or fine cracks, waterproof materials with good flexibility can better cover them.

[0003] Efflorescence is mainly the hydroxide and metal ions generated during the hydration of silicate cement in cement-based waterproof materials, such as Ca 2+ Mg 2+ etc., combined to form alkali salts, such as Ca(OH)2, Mg(OH)2, etc. Since the waterproof coating film is not dense enough and has some pores, water passes through the pore channels and brings alkali salts such as Ca(OH)2 and Mg(OH)2 to the surface of the waterproof coating during migration, reacting with carbon dioxide in the air to form crystals, which then gather on the surface of the coating film, resulting in a "whitening" phenomenon, which is the "alkaline efflorescence" phenomenon that often occurs after the construction of colored waterproof materials. As a result, when the waterproof material is actually dry, the construction workers find that the color rendering of the waterproof layer has deteriorated through visual inspection.

[0004] CN111117314A A cement waterproof coating and its preparation method and application, by adding a film-forming aid to reduce the glass transition temperature of latex particles, so that they are easy to deform at low temperatures, which is conducive to the diffusion, entanglement and fusion of latex molecular chains into a continuous film; the water reducer releases the moisture between cement particles, reduces the pores left by water evaporation, improves the density of the coating, and reduces the precipitation of Ca(OH)2; the early strength agent accelerates the cement hydration speed and shortens the precipitation time of Ca(OH)2. CN111117314A accelerates the cement hydration speed by adding an early strength agent, but at the same time shortens the usable time of the waterproof coating.

[0005] CN109942258A discloses a polymer cement waterproof coating that resists efflorescence and a preparation method thereof, wherein ammonium oxalate is added to the powder, and the ammonium oxalate reacts with Ca(OH)2 to generate calcium oxalate precipitation, and the purpose of alkali inhibition is achieved by solidifying Ca and Mg ions. CN11084597A discloses a polymer cement waterproof coating that resists efflorescence and a preparation method thereof, wherein ammonium oxalate is added to the powder, and the ammonium oxalate reacts with Ca(OH)2 to generate calcium oxalate precipitation, and the purpose of alkali inhibition is achieved by solidifying Ca and Mg ions. In CN11084597A, ammonium oxalate is added to react with calcium hydroxide to generate ammonia water, which is volatile, has a pungent odor, and is not environmentally friendly. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a colored waterproof material and a preparation method thereof, which can improve the problem that the colored waterproof material is easy to effloresce after construction, has poor flexibility, and the color sometimes becomes weak after construction. The present invention not only has the advantages of good adhesion, flexibility, and good color retention effect, but also has the advantages of being environmentally friendly, excellent performance, and not prone to "efflorescence, whitening, and fading" after construction.

[0007] To solve the above problems, the present invention is implemented through the following technical solutions:

[0008] The first object of the present invention is:

[0009] Provided is a colored waterproof material, comprising: a liquid component and a powder component;

[0010] The weight ratio of the liquid component to the powder component is 1:2.5-4;

[0011] The liquid component comprises the following components in parts by weight:

[0012] 20-70 parts of pure water, 0.15-0.25 parts of preservatives, 0.5-1.5 parts of water-based pigments, 0.15-0.25 parts of defoamers, 2-10 parts of color fixatives, 25-45 parts of butadiene-styrene copolymer emulsion, 5-20 parts of water-based aliphatic polyurethane hybrid modified epoxy emulsion;

[0013] The water-based aliphatic polyurethane hybrid modified epoxy emulsion is one or a combination of water-based acrylic hybrid modified epoxy emulsion, water-based polyurethane-polyacrylate hybrid modified epoxy emulsion, and water-based aliphatic polyurethane hybrid modified epoxy emulsion; in the water-based aliphatic polyurethane hybrid modified epoxy emulsion, there are urethane bonds in the polyurethane molecules, which can form multiple hydrogen bonds between polymer chains, so that the cured film has the advantages of excellent high flexibility, peel strength and the like.

[0014] The color fixer is one or a combination of silane coupling agent modified nano-silica color fixer and acrylate glycidyl modified nano-silica color fixer; the epoxy group in the molecular chain of the nano-silica color fixer modified by acrylate glycidyl has a high reactivity with hydroxyl under alkaline conditions, and can react with hydroxyl in pigment, cement and ordinary white sand to form a covalent bond, and the pigment and powder that originally cannot react are combined together through a covalent bond to maintain the long-term stability of the coating color. The organic group in the molecular chain of the silane coupling agent can react chemically with the macromolecule in the organic matter or form a hydrogen bond, thereby forming a strong bond with the organic matter. The hydrolyzed group can react with inorganic matter. Therefore, when the silane coupling agent is between the organic matrix and the inorganic matrix, it can effectively combine these two completely different materials, thereby improving the adhesion of the color and improving the color rendering of the waterproof material.

[0015] The powder component comprises the following components in parts by weight:

[0016] 45-65 parts of Portland cement, 35-55 parts of ordinary white sand, 0.5-1.5 parts of rheological additive, 0.1-0.2 parts of water reducing agent, 0.1-0.2 parts of water repellent;

[0017] The rheological additives include pyranose and calcium carbonate;

[0018] The mannopyranose is β-type polymerized 6-deoxy-L-mannopyranose.

[0019] The colored waterproof material of the present invention is further optimized as follows:

[0020] The butadiene-styrene copolymer emulsion has a butadiene content of 30% to 50% by mass and a styrene content of 60% to 80% by mass; the particle size of the butadiene-styrene copolymer emulsion ranges from 100 to 150 nm and the glass transition temperature ranges from 5 to 20°C.

[0021] Butadiene-styrene copolymer emulsion has excellent hydrophilicity and good workability with cement. It has good leveling properties during construction and can provide excellent impermeability.

[0022] The colored waterproof material of the present invention is further optimized as follows:

[0023] The weight percentage composition of the β-type polymerized 6-deoxy-L-mannopyranose and calcium carbonate is:

[0024] β-type polymerized 6-deoxy-L-pyranose 20% to 40%, calcium carbonate 60% to 80%, and the sum of all components is 100%.

[0025] The β-type crystals in 6-deoxy-L-pyranose in the rheological additive can effectively absorb some water molecules, and have good compatibility and affinity with cement. In addition, the calcium carbonate contained in the rheological additive can fill the pores in the coating, cutting off the pore channels for water molecules to migrate from the inside of the coating to the surface, making it difficult for water molecules to bring alkaline substances after cement hydration to the coating surface through the pores, effectively improving the alkali-fading phenomenon that is prone to occur after construction in existing waterproof materials.

[0026] The second object of the present invention is:

[0027] A method for preparing the above-mentioned colored waterproof material is provided, which comprises the following preparation steps:

[0028] A. Preparation of liquid material:

[0029] a1. Add pure water into the mixing tank according to the proportion, turn on the disperser, and stir at a speed of 800-1000r / min;

[0030] a2. Add the preservative, water-based pigment, defoamer, color fixative, butadiene-styrene copolymer emulsion, and water-based aliphatic polyurethane hybrid modified epoxy emulsion into a stirring tank in proportion, stir for 5 minutes after each raw material is added, and then add the next raw material in turn. After the addition is completed, stir at 800-1000r / min for 10 minutes; after stirring, package and set aside;

[0031] B. Preparation of powder:

[0032] Put silicate cement, ordinary white sand, rheological additive, water reducing agent and water repellent into a stirring kettle in proportion, stir at a speed of 400-500r / min for 10min; after stirring, pack and set aside;

[0033] C. Preparation of colored waterproof materials:

[0034] The colored waterproof material and the preparation method thereof of the present invention have the following technical features:

[0035] (1) Adding rheological additives to the powder component in the color waterproof material formula inhibits the release of strong calcium oxide to the coating surface (water brings alkaline salts such as Ca(OH)2 and Mg(OH)2 to the surface of the waterproof coating through the pore channels of the coating), thereby inhibiting the efflorescence phenomenon;

[0036] (2) By using butadiene-styrene copolymer emulsion in the liquid component, the leveling and impermeability of the product are improved; the flexibility of the product is improved by using water-based aliphatic polyurethane hybrid modified epoxy emulsion; the color fixing agent maintains the color of the colored waterproof. DETAILED DESCRIPTION

[0037] In order to make the application, technical scheme and advantages of the present invention clearer, the present invention is described in detail in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not limited to the present invention. All simple improvements to the preparation method of the present invention under the premise of the present invention are within the protection scope of the present invention.

[0038] Example 1 A method for preparing a colored waterproof material

[0039] A method for preparing a colored waterproof material, the colored waterproof material comprising: a liquid component and a powder component;

[0040] The weight ratio of the liquid component to the powder component is 1:2.5-4;

[0041] The liquid component comprises the following components in parts by weight:

[0042] 20-70 parts of pure water, 0.15-0.25 parts of preservatives, 0.5-1.5 parts of water-based pigments, 0.15-0.25 parts of defoamers, 2-10 parts of color fixatives, 25-45 parts of butadiene-styrene copolymer emulsion, 5-20 parts of water-based aliphatic polyurethane hybrid modified epoxy emulsion;

[0043] The water-based aliphatic polyurethane hybrid modified epoxy emulsion is one or a combination of water-based acrylic hybrid modified epoxy emulsion, water-based polyurethane-polyacrylate hybrid modified epoxy emulsion, and water-based aliphatic polyurethane hybrid modified epoxy emulsion;

[0044] The color fixing agent is one or a combination of silane coupling agent modified nano-silica color fixing agent and glycidyl acrylate modified nano-silica color fixing agent;

[0045] The powder component comprises the following components in parts by weight:

[0046] 45-65 parts of Portland cement, 35-55 parts of ordinary white sand, 0.5-1.5 parts of rheological additive, 0.1-0.2 parts of water reducing agent, 0.1-0.2 parts of water repellent;

[0047] The rheological additives include pyranose and calcium carbonate;

[0048] The mannopyranose is β-type polymerized 6-deoxy-L-mannopyranose.

[0049] The colored waterproof material comprises the following preparation steps:

[0050] A. Preparation of liquid material:

[0051] a1. Add pure water into the mixing tank according to the proportion, turn on the disperser, and the stirring speed is 800~1000r / min

[0052] a2. Preservatives, water-based pigments, defoamers, color fixatives, butadiene-styrene copolymer emulsions (labeled as butadiene-styrene emulsions in Table 1), and water-based aliphatic polyurethane hybrid modified epoxy emulsions are respectively and sequentially put into a stirring tank, and each raw material is stirred for 5 minutes after being added, and then the next raw material is added in turn. After the addition is completed, stir at 800 to 1000 r / min for 10 minutes; after stirring is completed, package and set aside;

[0053] B. Preparation of powder:

[0054] Put silicate cement, ordinary white sand, rheological additive, water reducing agent and water repellent into a stirring kettle in proportion, stir at a speed of 400-500r / min for 10min; after stirring, pack and set aside;

[0055] C. Preparation of colored waterproof materials:

[0056] Pour the prepared liquid component and powder component into the container in sequence according to the proportion, and then immediately stir them evenly with an electric stirrer to obtain a colored waterproof material.

[0057] Table 1 Raw material composition of the embodiments and comparative examples (parts by weight)

[0058]

[0059] 1. Relevant performance tests of embodiments and comparative examples:

[0060] Testing method: Refer to JC / T 2090-2011 "Polymer Cement Waterproof Slurry" standard for maintenance and related performance tests;

[0061] The specific results are shown in Table 2:

[0062] Table 2: Relevant performance test results of embodiments and comparative examples

[0063]

[0064] It can be seen from Table 2 that the relevant performances of the embodiments and comparative examples all meet the JC / T 2090-2011 standard. However, based on the test results of the above performance parameters, embodiment 1 has the best comprehensive performance, that is, embodiment 1 has the best comprehensive performance in terms of anti-seepage, bonding strength, flexibility and the like.

[0065] The difference between Comparative Example 2 and Comparative Example 1 is that Comparative Example 1 is a styrene acrylic system, and Comparative Example 2 is a butadiene styrene system. As can be seen from Table 2, the use of the butadiene styrene system of Comparative Example 2 has significantly improved impermeability, bonding strength, compressive strength, and usable time.

[0066] Comparative Example 3 adds "water-based aliphatic polyurethane hybrid modified epoxy emulsion" to the formula of Comparative Example 2. As can be seen from Table 2, the flexibility of Comparative Example 3 is significantly improved compared with Comparative Example 2.

[0067] Comparative Example 4 is a color fixing agent added with "one or a combination of a silane coupling agent modified nano-silica color fixing agent and a glycidyl acrylate modified nano-silica color fixing agent" on the basis of the formula of Comparative Example 3. As can be seen from Table 3, after adding the color fixing agent, the alkali-fading area of ​​Comparative Example 4 is significantly reduced.

[0068] Comparative Example 5 is a rheological additive of "β-type polymerized 6-deoxy-L-pyranose and calcium carbonate composition" added to the formula of Comparative Example 4. It can be seen from Tables 2 and 3 that after adding the rheological additive, the impermeability, bonding strength, and compressive strength are improved, and the anti-panning alkali resistance is also improved to a certain extent.

[0069] Example 1 is based on Comparative Example 5, and the weight ratio of "water-based aliphatic polyurethane hybrid modified epoxy emulsion, color fixing agent, and rheological additive" in the formula is optimized. It can be seen from Table 2 and Table 3 that Example 1 has better comprehensive performance in terms of impermeability, bonding strength, and anti-alkali resistance.

[0070] 2. Anti-efflorescence performance test

[0071] Test method: Refer to the standard JG / T 210-2018 "Primer for Interior and Exterior Walls of Buildings", prepare samples for each sample at the same time and cure for 48 hours, and then conduct anti-efflorescence performance test;

[0072] The specific results are shown in Table 3:

[0073] Table 3: Test results of anti-efflorescence performance of Examples and Comparative Examples

[0074] raw material Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Efflorescence area / % 27.6 62 61 61 38.8 28.8

[0075] As can be seen from Table 3, according to the test based on the JG / T 210-2018 "Primer for Interior and Exterior Walls of Buildings" standard, the efflorescence area of ​​Example 1 is the smallest, so its anti-efflorescence performance is the best.

[0076] To sum up, the above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the disclosed technical content are regarded as equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

[0077] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The experimental methods without specific conditions in the present invention are usually carried out under conventional conditions or conditions recommended by the manufacturer.

[0079] Unless otherwise stated, the various optimization technical solutions in the present invention can be combined with each other.

[0080] Unless otherwise indicated, percentages and parts are by weight.

[0081] Experimental methods without specific conditions specified in the instructions and examples are usually carried out under conventional conditions or conditions recommended by the manufacturers.

[0082] Unless otherwise defined, all professional and scientific terms used herein have the same meaning as those familiar to those skilled in the art. In addition, any method and material similar or equivalent to the described content can be applied to the method of the present invention.

Claims

1. A colored waterproof material, characterized by: It includes: liquid component and powder component; The weight ratio of the liquid component to the powder component is 1:2.5-4; The liquid component comprises the following components in parts by weight: 20-70 parts of pure water, 0.15-0.25 parts of preservatives, 0.5-1.5 parts of water-based pigments, 0.15-0.25 parts of defoamers, 2-10 parts of color fixatives, 25-45 parts of butadiene-styrene copolymer emulsion, 5-20 parts of water-based aliphatic polyurethane hybrid modified epoxy emulsion; The water-based aliphatic polyurethane hybrid modified epoxy emulsion is one or a combination of water-based acrylic hybrid modified epoxy emulsion, water-based polyurethane-polyacrylate hybrid modified epoxy emulsion, and water-based aliphatic polyurethane hybrid modified epoxy emulsion; The color fixing agent is one or a combination of silane coupling agent modified nano-silica color fixing agent and glycidyl acrylate modified nano-silica color fixing agent; The powder component comprises the following components in parts by weight: 45-65 parts of Portland cement, 35-55 parts of ordinary white sand, 0.5-1.5 parts of rheological additive, 0.1-0.2 parts of water reducing agent, 0.1-0.2 parts of water repellent; The rheological additives include mannopyranose and calcium carbonate; The mannopyranose is β-type polymerized 6-deoxy-L-mannopyranose.

2. The colored waterproof material according to claim 1, characterized in that: The butadiene-styrene copolymer emulsion has a butadiene content of 30% to 50% by mass and a styrene content of 60% to 80% by mass; the particle size of the butadiene-styrene copolymer emulsion ranges from 100 to 150 nm and the glass transition temperature ranges from 5 to 20°C.

3. The colored waterproof material according to claim 1, characterized in that: The weight percentage composition of the beta-type polymerized 6-deoxy-L-pyranose and calcium carbonate is: 20% to 40% of beta-type polymerized 6-deoxy-L-pyranose and 60% to 80% of calcium carbonate, and the sum of all the components is 100%.

4. A method for preparing the colored waterproof material according to claim 1, characterized in that: It comprises the following preparation steps: A. Preparation of liquid material: a1. Add pure water into the mixing tank according to the proportion, turn on the disperser, and stir at a speed of 800-1000r / min; a2. Add the preservative, water-based pigment, defoamer, color fixative, butadiene-styrene copolymer emulsion, and water-based aliphatic polyurethane hybrid modified epoxy emulsion into a stirring tank in proportion, stir for 5 minutes after each raw material is added, and then add the next raw material in turn. After the addition is completed, stir at 800-1000r / min for 10 minutes; after stirring, package and set aside; B. Preparation of powder: Put silicate cement, ordinary white sand, rheological additive, water reducing agent and water repellent into a stirring kettle in proportion, stir at a speed of 400-500r / min for 10 minutes; after stirring, pack and set aside; C. Preparation of colored waterproof materials: Pour the prepared liquid component and powder component into the container in sequence according to the proportion, and then immediately stir them evenly with an electric stirrer to obtain a colored waterproof material.

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