阅读说明：本技术 一种高耐水环保防水密封膏及其制备方法和应用 (High-water-resistance environment-friendly waterproof sealant and preparation method and application thereof ) 是由 牛海波 李忠人 周围 贺小钢 于 2021-09-26 设计创作，主要内容包括：本发明涉及一种防水密封膏及其制备方法和应用,防水密封膏包括乳化沥青、阴离子聚合物胶乳、超耐水添加剂、疏水填料和助剂；其中,以所述防水密封膏总质量为100%计,所述乳化沥青的添加量为15%～35%；所述阴离子聚合物胶乳的添加量为20%～45%；所述超耐水添加剂的添加量为1%～10%；所述疏水填料的添加量为20～45%；其中,所述超耐水添加剂为阴离子型聚合物乳液。本发明通过防水密封膏的组分及配比的协同作用,使得防水密封膏具有环保无害、固含量高、耐水性优异、储存稳定性优异、干燥速度快、施工性能优异、施工工序简单、适应建筑构件连接处材料的多样性、复杂性,并确保产品对建筑构件连接处各类材质能有效、长久密封防水的优点。(The invention relates to a waterproof sealant and a preparation method and application thereof, wherein the waterproof sealant comprises emulsified asphalt, anionic polymer latex, a super-water-resistant additive, hydrophobic filler and an auxiliary agent; wherein the addition amount of the emulsified asphalt is 15-35% based on 100% of the total mass of the waterproof sealant; the addition amount of the anionic polymer latex is 20% -45%; the additive amount of the super water-resistant additive is 1% -10%; the addition amount of the hydrophobic filler is 20-45%; wherein the super water-resistant additive is an anionic polymer emulsion. The waterproof sealing paste has the advantages of environmental protection, no harm, high solid content, excellent water resistance, excellent storage stability, high drying speed, excellent construction performance, simple construction process, adaptability to the diversity and complexity of materials at the joints of building components, effective performance of the product on various materials at the joints of the building components, and long-term sealing and waterproofing by the synergistic effect of the components and the proportion of the waterproof sealing paste.)

1. A waterproof sealant is characterized in that: the asphalt emulsion comprises emulsified asphalt, anionic polymer latex, a super-water-resistant additive, hydrophobic filler and an auxiliary agent; wherein the addition amount of the emulsified asphalt is 15-35% of the total mass of the waterproof sealant; the addition amount of the anionic polymer latex is 20-45% of the total mass of the waterproof sealant; the addition amount of the super-water-resistant additive is 1-10% of the total mass of the waterproof sealant; the addition amount of the hydrophobic filler is 20-45% of the total mass of the waterproof sealant; wherein the super water-resistant additive is an anionic polymer emulsion.

2. The waterproof sealant according to claim 1, wherein: the solid content of the waterproof sealing paste is more than or equal to 70 percent.

3. The waterproof sealant according to claim 1, wherein: the super-water-resistant additive is one or any two or more than two of anionic polyethylene wax emulsion, anionic oxidized polyethylene wax emulsion, anionic polypropylene wax emulsion, anionic oxidized polypropylene wax emulsion or anionic polytetrafluoroethylene emulsion; and/or the addition amount of the super-water-resistant additive is 3-8% of the total mass of the waterproof sealant.

4. The waterproof sealant according to claim 1, wherein: the anionic polymer latex is one or any two or more of anionic neoprene latex, anionic butylbenzene latex, hydrophobic modified anionic acrylic latex or hydrophobic modified anionic styrene-acrylic latex; and/or the addition amount of the anionic polymer latex is 30-40% of the total mass of the waterproof sealant.

5. The waterproof sealant according to claim 1, wherein: the hydrophobic filler is one or two or more than two of hydrophobic modified nano calcium carbonate, hydrophobic modified nano talcum powder, hydrophobic modified nano silicon dioxide or sub-nano polytetrafluoroethylene particles; and/or the addition amount of the hydrophobic filler is 30-40% of the total mass of the waterproof sealant.

6. The waterproof sealant according to claim 1, wherein: the emulsified asphalt comprises the following components in a mass ratio of 10-30: 8-25: 1-3: 0.5-1: 0.1-0.3 of asphalt, water, an anionic emulsifier, a nonionic emulsifier and a stabilizer.

7. The waterproof sealant according to claim 6, wherein: the mass ratio of the asphalt to the water is 15-20: 8-15.

8. The waterproof sealant according to claim 6 or 7, characterized in that: the asphalt is one or any two or more selected from 30# asphalt, 50# asphalt, 70# asphalt, 90# asphalt or 110# asphalt; and/or the presence of a gas in the gas,

the water is one or any two or more selected from distilled water, deionized water, tap water, industrial water or river water; and/or the presence of a gas in the gas,

the anionic emulsifier is one or two or more of alkyl benzene sulfonate type emulsifier, alkyl sulfonate type emulsifier or lignin sulfonate type emulsifier; and/or the presence of a gas in the gas,

the nonionic emulsifier is one or two or more of long-chain fatty alcohol-polyoxyethylene ether, alkylphenol ethoxylates, fatty acid-polyoxyethylene ester or polyether emulsifier; and/or the presence of a gas in the gas,

the stabilizer is one or two or more of sodium carboxymethylcellulose, hydroxyethyl cellulose, hydroxypropyl methylcellulose or polyvinyl alcohol.

9. The waterproof sealant according to claim 1, wherein: the auxiliary agent comprises one or any two or more of a defoaming agent, a preservative and a hydrophobically modified thickening agent.

10. The waterproof sealant according to claim 9, wherein: the mass ratio of the defoaming agent to the preservative to the hydrophobically modified thickener is 0.1-0.3: 0.1-2.5; and/or the presence of a gas in the gas,

the defoaming agent is one or any two or more of mineral oil defoaming agent, organic silicon defoaming agent, polyether defoaming agent or polysiloxane defoaming agent; and/or the presence of a gas in the gas,

the preservative is one or any two or more of isothiazolinone preservatives, formaldehyde releasing preservatives, benzisothiazoline preservatives or s-triazine preservatives; and/or the presence of a gas in the gas,

the hydrophobic modified thickener is one or two or more than two of hydrophobic modified alkali swelling thickeners, hydrophobic modified alkali swelling associated thickeners or hydrophobic modified polyurethane thickeners.

11. A method for producing the waterproof sealant according to any one of claims 1 to 10, characterized by: and uniformly mixing the hydrophobic filler with the anionic polymer latex, uniformly mixing the hydrophobic filler with the emulsified asphalt and the super-water-resistant additive, and finally adding the auxiliary agent to uniformly mix to obtain the waterproof sealant.

12. The method of claim 11, wherein: the temperature of the mixing process is controlled to be 10-50 ℃.

13. The method of claim 11, wherein: the emulsified asphalt is prepared by the following steps:

(1) uniformly mixing an anionic emulsifier, a nonionic emulsifier, a stabilizer and water to prepare a soap solution, and adjusting the pH of the soap solution to 10-12;

(2) heating the asphalt to 130-140 ℃, and stirring for 0.5-1 hour;

(3) and (3) controlling the temperature of the soap solution to be 30-80 ℃, controlling the temperature of the asphalt treated in the step (2) to be 100-150 ℃, then mixing and grinding the soap solution and the asphalt for 1-3min, controlling the discharging temperature of the emulsified asphalt to be 50-95 ℃, and naturally cooling to obtain the emulsified asphalt.

14. Use of the waterproof sealant according to any one of claims 1 to 10 in waterproof caulking of buildings.

Technical Field

The invention belongs to the technical field of waterproof building materials, and particularly relates to a high-water-resistance environment-friendly waterproof sealant as well as a preparation method and application thereof.

Background

The building leakage is a prominent common building quality disease, and improper construction of detail nodes is one of the main reasons for the building leakage. The structure of the detail node is complex, and the materials are various, such as cement, aluminum, plastic, glass and other members, so the processing difficulty of the structure of the detail node is large.

In actual construction material selection, the detailed node structures are mostly treated by adopting sealing materials such as common waterproof paint, ointment and the like, the sealing materials have weak cohesiveness or other physical properties, such as poor sealing treatment, bubble water swelling and shrinkage cracking in a short term, and unshelling, edge warping, brittle fracture and the like with a bonding surface in a long term. The reason for this is that, in addition to the components of the sealing material itself, the compatibility between the sealing material and the joint base material is also concerned, and if the compatibility between the selected sealing material and the base material is poor, the interface is easily peeled off after a long time, and a water leakage path is formed.

For example, patent CN111793436A discloses a one-component asphalt-based water-based non-cured rubber asphalt waterproof coating, which is mainly prepared from the following components in parts by weight: 10-40 parts of asphalt, 10-40 parts of softening oil, 30-50 parts of water, 5-20 parts of anionic polymer latex, 1-3 parts of anionic emulsifier, 1-3 parts of nonionic emulsifier, 0.1-0.3 part of stabilizer, 0.1-0.3 part of defoamer, 0.1-0.3 part of preservative, 0.1-2.5 parts of thickener and 5-15 parts of inorganic filler. Although the waterproof coating has good adhesive property with waterproof coiled materials and various base materials, the self cohesion of the waterproof coating is small, the deviation of the self cohesion with the adhesive property index of different base materials cannot meet the use requirement, the solid content of the waterproof coating is only 68 percent at most, the heat resistance is deviated, the product can flow due to high temperature in summer, and the long-term water resistance is still required to be improved.

Therefore, the waterproof sealing paste product with high water resistance and environmental protection, which is environment-friendly, harmless, excellent in water resistance, high in solid content, excellent in storage stability, high in drying speed, excellent in construction performance, simple in construction process, suitable for the diversity and complexity of materials at the joints of building components, and capable of ensuring effective and long-term sealing and waterproofing of various materials at the joints of the building components, becomes an urgent task.

Disclosure of Invention

The invention provides a high-water-resistance environment-friendly waterproof sealant, and a preparation method and application thereof, aiming at overcoming the problems of poor sealing effect, swelling and shrinkage cracking of foam, unshelling, edge warping, brittle fracture and the like of an adhesive surface of the conventional waterproof sealant.

In order to achieve the purpose, the technical scheme is as follows:

the invention provides a waterproof sealant which comprises emulsified asphalt, anionic polymer latex, a super-water-resistant additive, a hydrophobic filler and an auxiliary agent; wherein the addition amount of the emulsified asphalt is 15-35% of the total mass of the waterproof sealant; the addition amount of the anionic polymer latex is 20-45% of the total mass of the waterproof sealant; the addition amount of the super water-resistant additive is 1-10% of the total mass of the waterproof sealant; the addition amount of the hydrophobic filler is 20-45% of the total mass of the waterproof sealant; wherein the super water-resistant additive is an anionic polymer emulsion.

Preferably, the solid content of the waterproof sealing paste is more than or equal to 70%.

Preferably, the super-water-resistant additive is one or any two or more selected from anionic polyethylene wax emulsion, anionic oxidized polyethylene wax emulsion, anionic polypropylene wax emulsion, anionic oxidized polypropylene wax emulsion or anionic polytetrafluoroethylene emulsion.

Preferably, the addition amount of the super water-resistant additive is 3-8% of the total mass of the waterproof sealant.

Preferably, the anionic polymer latex is one or any two or more selected from anionic neoprene latex, anionic styrene-butadiene latex, hydrophobic modified anionic acrylic latex or hydrophobic modified anionic styrene-acrylic latex.

Preferably, the addition amount of the anionic polymer latex is 30 to 40 percent of the total mass of the waterproof sealant.

Preferably, the hydrophobic filler is one or any two or more of hydrophobic modified nano calcium carbonate, hydrophobic modified nano talcum powder, hydrophobic modified nano silicon dioxide or sub-nano polytetrafluoroethylene particles.

Preferably, the addition amount of the hydrophobic filler is 30-40% of the total mass of the waterproof sealant.

Preferably, the emulsified asphalt comprises the following components in a mass ratio of 10-30: 8-25: 1-3: 0.5-1: 0.1-0.3 of asphalt, water, an anionic emulsifier, a nonionic emulsifier and a stabilizer.

Further preferably, the mass ratio of the asphalt to the water is 15-20: 8-15.

Further preferably, the asphalt is one or any two or more selected from 30# asphalt, 50# asphalt, 70# asphalt, 90# asphalt and 110# asphalt.

Further preferably, the water is one or any two or more selected from distilled water, deionized water, tap water, industrial water or river water.

Further preferably, the anionic emulsifier is one or any two or more selected from an alkylbenzene sulfonate type emulsifier, an alkyl sulfonate type emulsifier or a lignosulfonate type emulsifier.

Further preferably, the nonionic emulsifier is one or any two or more selected from long-chain fatty alcohol polyoxyethylene ether, alkylphenol ethoxylates, fatty acid polyoxyethylene ester or polyether emulsifier.

Further preferably, the stabilizer is one or any two or more selected from sodium carboxymethylcellulose, hydroxyethyl cellulose, hydroxypropyl methylcellulose or polyvinyl alcohol.

Preferably, the auxiliary agent comprises one or any two or more of a defoaming agent, a preservative and a hydrophobically modified thickening agent.

Further preferably, the mass ratio of the defoaming agent to the preservative to the hydrophobically modified thickener is 0.1-0.3: 0.1-2.5.

Further preferably, the defoaming agent is one or any two or more selected from mineral oil defoaming agents, silicone defoaming agents, polyether defoaming agents and polysiloxane defoaming agents.

Further preferably, the preservative is one or any two or more selected from isothiazolinone preservatives, formaldehyde-releasing preservatives, benzisothiazoline preservatives or s-triazine preservatives.

Further preferably, the hydrophobically modified thickener is one or any two or more selected from a hydrophobically modified alkali swelling thickener, a hydrophobically modified alkali swelling associative thickener or a hydrophobically modified polyurethane thickener.

The second aspect of the invention provides a preparation method of the waterproof sealant, which comprises the steps of uniformly mixing the hydrophobic filler and the anionic polymer latex, uniformly mixing the hydrophobic filler, the emulsified asphalt and the super-water-resistant additive, and finally adding the auxiliary agent to uniformly mix the mixture to obtain the waterproof sealant.

Preferably, the temperature of the mixing process is controlled to be 10-50 ℃.

Preferably, the emulsified asphalt is prepared by the following steps:

(1) uniformly mixing an anionic emulsifier, a nonionic emulsifier, a stabilizer and water to prepare a soap solution, and adjusting the pH of the soap solution to 10-12;

(2) heating the asphalt to 130-140 ℃, and stirring for 0.5-1 hour;

(3) and (3) controlling the temperature of the soap solution to be 30-80 ℃, controlling the temperature of the asphalt treated in the step (2) to be 100-150 ℃, then mixing and grinding the soap solution and the asphalt for 1-3min, controlling the discharging temperature of the emulsified asphalt to be 50-95 ℃, and naturally cooling to obtain the emulsified asphalt.

The third aspect of the invention provides the application of the waterproof sealing paste in waterproof caulking of buildings.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

the waterproof sealing paste has the advantages of environmental protection, no harm, high solid content, excellent water resistance, excellent storage stability, high drying speed, excellent construction performance, simple construction process, adaptability to the diversity and complexity of materials at the joints of building components, effective performance of the product on various materials at the joints of the building components, and long-term sealing and waterproofing by the synergistic effect of the components and the proportion of the waterproof sealing paste.

Detailed Description

Specific embodiments of the present invention will be described below.

The invention provides a waterproof sealant, which comprises emulsified asphalt, anionic polymer latex, a super-water-resistant additive, hydrophobic filler and an auxiliary agent; wherein the addition amount of the emulsified asphalt is 15-35% of the total mass of the waterproof sealant; the addition amount of the anionic polymer latex is 20-45% of the total mass of the waterproof sealant; the addition amount of the super water-resistant additive is 1-10% of the total mass of the waterproof sealant; the addition amount of the hydrophobic filler is 20-45% of the total mass of the waterproof sealant; wherein the super water-resistant additive is an anionic polymer emulsion.

The waterproof sealing paste is a water-based product, takes water as a solvent, is a single-component formula, is free of volatilization of harmful substances, and is more friendly to environment and constructors. Moreover, the solid content of the waterproof sealant can reach 70% or more, for example, 70% -80%, and the waterproof sealant still has excellent storage stability under high solid content. The waterproof sealing paste has high solid content and high drying speed, and can be constructed at normal temperature, so that the construction cost is saved. In addition, the waterproof sealant can adapt to the diversity and complexity of materials at the joints of the building components, and can ensure that the product can effectively and permanently seal and prevent water for various materials at the joints of the building components.

According to some embodiments, the super water-resistant additive preferably adopts a polymer which is excellent in high-temperature performance and water resistance, has properties close to those of wax and has a contact angle with water larger than 135 degrees as a main component, and on one hand, the super water-resistant additive can generate a phenomenon of mutual crossing of molecular chains by physical blending with asphalt, an anionic polymer and the like, so that the stability of the waterproof sealant is higher, and the solid content of the waterproof sealant can be improved as much as possible under the condition of ensuring the storage stability; on the other hand, in the drying process of the waterproof sealing paste, the resin component in the super-water-resistant additive can partially migrate to the surface of the coating, so that the surface of the coating shows a certain lotus effect, the coating is prevented from being invaded by water, and the water resistance of the waterproof sealing paste is further improved. According to some preferred embodiments, the super water-resistant additive is one or any two or more selected from the group consisting of an anionic polyethylene wax emulsion, an anionic oxidized polyethylene wax emulsion, an anionic polypropylene wax emulsion, an anionic oxidized polypropylene wax emulsion, and an anionic polytetrafluoroethylene emulsion.

Further, the addition amount of the super water-resistant additive is 3-8% of the total mass of the waterproof sealant, such as 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%. If the addition amount of the super-water-resistant additive is too low, the water resistance of the waterproof sealant is insufficient; if the amount is too high, the adhesion of the waterproof sealant to the substrate and the low-temperature performance are impaired.

According to some embodiments, the anionic polymer latex is preferably based on a polymer that is flexible, has good low temperature properties and resilience, has excellent water resistance, and has properties closer to rubber. According to some specific and preferred embodiments, the anionic polymer latex is one or any two or more selected from anionic polychloroprene latex, anionic styrene-butadiene latex, hydrophobically modified anionic acrylic latex or hydrophobically modified anionic styrene-acrylic latex.

Further, the amount of the anionic polymer latex added is 30% to 40%, for example, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39% of the total mass of the waterproof sealant. If the dosage of the anionic polymer latex is too low, the low-temperature performance of the waterproof sealant at-10 ℃ is difficult to reach the standard, and the adhesive property of the waterproof sealant with various substrates is insufficient; if the amount is too high, the cost of the product is significantly increased.

According to some embodiments, the hydrophobic filler is one or any two or more selected from the group consisting of hydrophobically modified nano calcium carbonate, hydrophobically modified nano talc, hydrophobically modified nano silica and sub-nano polytetrafluoroethylene particles. The preferred hydrophobic filler helps to improve the water resistance and storage stability of the waterproof sealant.

Further, the addition amount of the hydrophobic filler is 30-40% of the total mass of the waterproof sealant, such as 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%. If the dosage of the hydrophobic filler is too low, the solid content of the waterproof sealant is low, so that the construction time is prolonged; if the amount of the hydrophobic filler is too high, the storage stability of the waterproof sealant is not good, and various properties of the product may be significantly reduced.

According to some embodiments, the emulsified asphalt is self-formulated slow-breaking slow-setting anionic emulsified asphalt. Preferably, the emulsified asphalt comprises the following components in a mass ratio of 10-30: 8-25: 1-3: 0.5-1: 0.1-0.3 of asphalt, water, a slow-breaking slow-setting anionic emulsifier, a nonionic emulsifier and a stabilizer. Further preferably, the mass ratio of the asphalt to the water is 15-20: 8-15, and more preferably 15-20: 8-10.

Wherein, the asphalt can be selected according to specific needs, convenient and fast material obtaining and component aspects. Preferably, the asphalt is one or any two or more selected from 30# asphalt, 50# asphalt, 70# asphalt, 90# asphalt and 110# asphalt.

Further preferably, the water is one or any two or more selected from distilled water, deionized water, tap water, industrial water or river water.

Further preferably, the anionic emulsifier adopts Ca²⁺、Mg²⁺A slow-breaking and slow-setting anionic emulsifier with excellent metal ion stability and water resistance. For example, the anionic emulsifier is one or two or more selected from alkyl benzene sulfonate type emulsifiers, alkyl sulfonate type emulsifiers, and lignin sulfonate type emulsifiers.

Further preferably, the nonionic emulsifier is one or any two or more selected from long-chain fatty alcohol polyoxyethylene ether, alkylphenol ethoxylates, fatty acid polyoxyethylene ester or polyether emulsifier.

Further preferably, the stabilizer is one or any two or more selected from sodium carboxymethylcellulose, hydroxyethyl cellulose, hydroxypropyl methylcellulose or polyvinyl alcohol. By using these preferred kinds of stabilizers, the storage stability of the anionic emulsified asphalt and the waterproof sealant can be further improved.

Preferably, the auxiliary agent comprises one or any two or more of a defoaming agent, a preservative and a hydrophobically modified thickening agent. Further preferably, the mass ratio of the defoaming agent to the preservative to the hydrophobically modified thickener is 0.1-0.3: 0.1-2.5.

Further preferably, the defoaming agent is one or any two or more selected from mineral oil defoaming agents, silicone defoaming agents, polyether defoaming agents and polysiloxane defoaming agents. By adopting the preferred types of defoaming agents, the defoaming agent can be better matched with other components in the formula so as to further improve the defoaming effect.

Further preferably, the preservative is one or any two or more selected from isothiazolinone preservatives, formaldehyde-releasing preservatives, benzisothiazoline preservatives or s-triazine preservatives. The preferred type of preservative is better matched with the other components in the formula so as to have better preservative effect.

Further preferably, the hydrophobically modified thickener is one or any two or more selected from a hydrophobically modified alkali swelling thickener, a hydrophobically modified alkali swelling associative thickener or a hydrophobically modified polyurethane thickener. The preferable hydrophobic modified thickening agent adjusts the viscosity and the water resistance of the waterproof sealing paste, and has low cost.

The preparation method of the waterproof sealant comprises the following steps:

1) weighing the raw materials according to the weight part ratio, adding the anionic emulsifier, the nonionic emulsifier and the stabilizer into water, uniformly mixing to prepare a soap solution, and adjusting the pH value of the soap solution to 10-12 for later use;

2) heating the asphalt to 140 ℃ and stirring for 0.5-1 h for later use;

3) mixing and grinding the soap solution obtained in the step 1) and the asphalt obtained in the step 2) for 1-3min by a colloid mill, and naturally cooling to room temperature to obtain emulsified asphalt;

4) slowly adding the super-water-resistant filler into the anionic polymer latex, and uniformly mixing the super-water-resistant filler and the anionic polymer latex to obtain modified anionic polymer latex;

5) slowly adding the emulsified asphalt prepared in the step 3) into the modified anionic polymer latex prepared in the step 4), adding a super-water-resistant additive, and uniformly mixing; adding a defoaming agent and a preservative into the mixture, and uniformly mixing; and slowly adding the hydrophobic modified thickening agent, and uniformly mixing to obtain the high-water-resistance environment-friendly waterproof sealant.

Preferably, NaOH water solution with the mass concentration of 8-12% is used for adjusting the pH value of the soap solution in the step (1).

Preferably, in the step 3), the temperature of the soap solution before the mixing and grinding by the colloid mill is 30-80 ℃ by heating, and the temperature of the modified asphalt before the mixing and grinding by the colloid mill is 100-150 ℃ by heating; and controlling the discharging temperature of the emulsified asphalt to be 50-95 ℃ in the mixing and grinding process of the colloid mill.

Preferably, the temperature of the mixing process in step 4) and step 5) is controlled between 10-50 ℃.

The preferred temperature parameters make the waterproof sealant more excellent in performance.

The preparation process of the waterproof sealant is simple, convenient and quick, and consumes less time. Wherein, the optimized technological parameters ensure the full interaction of the components of the waterproof coating and ensure the excellent performance of the waterproof sealant.

Compared with the prior art, the waterproof sealant disclosed by the invention has the following advantages:

(1) the high-water-resistance environment-friendly waterproof sealant is a novel water-based environment-friendly building waterproof sealant product, can be applied to blade coating construction at normal temperature, and has excellent anti-sagging performance, excellent storage stability, excellent adhesion performance with different base materials, quick drying performance and excellent water resistance;

(2) the high-water-resistance environment-friendly waterproof sealant has high solid content, high water volatilization speed and short drying time, has excellent adhesive property with asphalt-based waterproof coiled materials and various base materials such as cement, aluminum plates, plastics and the like, and is particularly suitable for waterproof and joint-plugging construction of buildings; the construction process is simple, environment-friendly, nontoxic and pollution-free, and is a product of 'seven-minute product, three-minute construction';

(3) the high-water-resistance environment-friendly waterproof sealant adopts water as a solvent, does not contain harmful organic volatile solvents such as benzene, toluene and xylene, is environment-friendly and pollution-free, and does not have any health hazard to constructors.

The technical solutions of the present invention are described in detail below with reference to specific examples so that those skilled in the art can better understand and implement the technical solutions of the present invention, but the present invention is not limited to the scope of the examples.

The raw materials in the following embodiments can be obtained commercially, and the solid content of the raw materials such as latex, emulsion and the like can be selected according to needs, so that the solid content of the waterproof sealant can be ensured to reach 70% or more.

Comparative example

The high-water-resistance environment-friendly waterproof sealant is mainly prepared from the following components in parts by weight:

the preparation method of the high-water-resistance environment-friendly waterproof sealant comprises the following steps of:

1) weighing the raw materials according to the weight part ratio, adding a carboxylate emulsifier, long-chain fatty alcohol-polyoxyethylene ether and sodium carboxymethylcellulose into distilled water, uniformly mixing to prepare a soap solution, and adjusting the pH value of the soap solution to 11;

2) heating No. 70 asphalt to 135 ℃, and stirring for 0.8 hour for later use;

3) mixing and grinding the soap solution obtained in the step 1) and the asphalt obtained in the step 2) for 1min by a colloid mill, and naturally cooling to room temperature to obtain emulsified asphalt;

4) slowly adding calcium carbonate into the anionic acrylic latex, and uniformly mixing the calcium carbonate and the anionic acrylic latex to obtain modified anionic polymer latex;

5) slowly adding the emulsified asphalt prepared in the step 3) into the modified anionic polymer latex prepared in the step 4), and uniformly mixing; adding mineral oil defoaming agent and isothiazolinone preservative into the mixture, and mixing uniformly; slowly adding polyacrylic acid thickening agent, and uniformly mixing to obtain the waterproof sealant.

In the step 3), the temperature of the soap solution before the mixing and grinding through the colloid mill is 60 ℃ by heating, and the temperature of the modified asphalt before the mixing and grinding through the colloid mill is 120 ℃ by heating; controlling the discharging temperature of the emulsified asphalt to be 80 ℃ in the mixing and grinding process of the colloid mill; the temperature of the mixing process in the step 4) and the step 5) is controlled between 30 ℃.

Example 1

The invention relates to a high-water-resistance environment-friendly waterproof sealant which is mainly prepared from the following components in parts by weight:

the preparation method of the high-water-resistance environment-friendly waterproof sealant comprises the following steps of:

1) weighing the raw materials according to the weight part ratio, adding an alkylbenzene sulfonate emulsifier, long-chain fatty alcohol-polyoxyethylene ether and sodium carboxymethylcellulose into distilled water, uniformly mixing to prepare a soap solution, and adjusting the pH value of the soap solution to 11;

2) heating the 30# asphalt to 135 ℃, and stirring for 0.8 hour for later use;

3) mixing and grinding the soap solution obtained in the step 1) and the asphalt obtained in the step 2) for 2min by a colloid mill, and naturally cooling to room temperature to obtain emulsified asphalt;

4) slowly adding the hydrophobic modified nano calcium carbonate into the anionic neoprene latex, uniformly mixing the hydrophobic modified nano calcium carbonate and the anionic neoprene latex, adding the anionic polyethylene wax emulsion, and uniformly stirring to obtain modified anionic polymer latex;

5) slowly adding the emulsified asphalt prepared in the step 3) into the modified anionic polymer latex prepared in the step 4), and uniformly mixing; adding mineral oil defoaming agent and isothiazolinone preservative into the mixture, and mixing uniformly; and slowly adding the hydrophobically modified alkali swelling thickener, and uniformly mixing to obtain the high-water-resistance environment-friendly waterproof sealant.

In the step 3), the temperature of the soap solution before the mixing and grinding through the colloid mill is 60 ℃ by heating, and the temperature of the modified asphalt before the mixing and grinding through the colloid mill is 120 ℃ by heating; controlling the discharging temperature of the emulsified asphalt to be 80 ℃ in the mixing and grinding process of the colloid mill; the temperature of the mixing process in the step 4) and the step 5) is controlled between 30 ℃.

Example 2

The invention relates to a high-water-resistance environment-friendly waterproof sealant which is mainly prepared from the following components in parts by weight:

the preparation method of the high-water-resistance environment-friendly waterproof sealant comprises the following steps of:

1) weighing the raw materials according to the weight part ratio, adding an alkyl sulfonate emulsifier, alkylphenol polyoxyethylene ether and hydroxyethyl cellulose into deionized water, uniformly mixing to prepare a soap solution, and adjusting the pH value of the soap solution to 10;

2) heating No. 50 asphalt to 140 ℃, and stirring for 0.5 hour for later use;

3) mixing and grinding the soap solution obtained in the step 1) and the asphalt obtained in the step 2) for 3min by a colloid mill, and naturally cooling to room temperature to obtain emulsified asphalt;

4) slowly adding the hydrophobic modified nano talcum powder into the anionic styrene-butadiene latex, uniformly mixing the hydrophobic modified nano talcum powder and the anionic styrene-butadiene latex, adding the anionic polypropylene wax emulsion, and uniformly stirring to obtain modified anionic polymer latex;

5) slowly adding the emulsified asphalt prepared in the step 3) into the modified anionic polymer latex prepared in the step 4), and uniformly mixing; then adding an organic silicon defoaming agent and a formaldehyde-releasing preservative into the mixture, and uniformly mixing; and slowly adding the hydrophobically modified alkali swelling associative thickener, and uniformly mixing to obtain the high-water-resistance environment-friendly waterproof sealant.

In the step 3), the temperature of the soap solution before mixing and grinding through a colloid mill is 30 ℃ by heating, and the temperature of the modified asphalt before mixing and grinding through the colloid mill is 150 ℃ by heating; controlling the discharging temperature of the emulsified asphalt to be 50 ℃ in the mixing and grinding process of the colloid mill; the temperature of the mixing process in the step 4) and the step 5) is controlled between 50 ℃.

Example 3

The invention relates to a high-water-resistance environment-friendly waterproof sealant which is mainly prepared from the following components in parts by weight:

the preparation method of the high-water-resistance environment-friendly waterproof sealant comprises the following steps of:

1) weighing the raw materials according to the weight part ratio, adding the lignosulfonate emulsifier, the fatty acid polyoxyethylene ester and the hydroxypropyl methyl cellulose into tap water, uniformly mixing to prepare a soap solution, and adjusting the pH value of the soap solution to 12;

2) heating the 70# asphalt to 140 ℃ and stirring for 1 hour for later use;

3) mixing and grinding the soap solution obtained in the step 1) and the asphalt obtained in the step 2) for 1min by a colloid mill, and naturally cooling to room temperature to obtain emulsified asphalt;

4) slowly adding the hydrophobically modified nano-silica into the hydrophobically modified anionic acrylic latex, uniformly mixing the hydrophobically modified nano-silica and the hydrophobically modified anionic acrylic latex, adding the anionic polytetrafluoroethylene emulsion, and uniformly stirring to obtain modified anionic polymer latex;

5) slowly adding the emulsified asphalt prepared in the step 3) into the modified anionic polymer latex prepared in the step 4), and uniformly mixing; then adding polyether defoaming agent and benzisothiazoline preservative into the mixture, and mixing the mixture evenly; and slowly adding the hydrophobically modified polyurethane thickening agent, and uniformly mixing to obtain the high-water-resistance environment-friendly waterproof sealant.

In the step 3), the temperature of the soap solution before the mixing and grinding through the colloid mill is 80 ℃ by heating, and the temperature of the modified asphalt before the mixing and grinding through the colloid mill is 100 ℃ by heating; controlling the discharging temperature of the emulsified asphalt to be 95 ℃ in the mixing and grinding process of the colloid mill; the temperature of the mixing process in the step 4) and the step 5) is controlled between 10 ℃.

Example 4

The invention relates to a high-water-resistance environment-friendly waterproof sealant which is mainly prepared from the following components in parts by weight:

the preparation method of the high-water-resistance environment-friendly waterproof sealant comprises the following steps of:

1) weighing the raw materials according to the weight part ratio, adding the alkylbenzene sulfonate emulsifier, the polyether emulsifier and the polyvinyl alcohol into industrial water, uniformly mixing to prepare a soap solution, and adjusting the pH value of the soap solution to 10;

2) heating 90# asphalt to 130 ℃, and stirring for 1 hour for later use;

3) mixing and grinding the soap solution obtained in the step 1) and the modified asphalt obtained in the step 2) for 2min by a colloid mill, and naturally cooling to room temperature to obtain emulsified asphalt;

4) slowly adding the sub-nano polytetrafluoroethylene particles into the hydrophobically modified anionic styrene-acrylic latex, uniformly mixing the two, adding the anionic polyethylene wax emulsion, and uniformly stirring to obtain modified anionic polymer latex;

5) slowly adding the emulsified asphalt prepared in the step 3) into the modified anionic polymer latex prepared in the step 4), and uniformly mixing; then adding a polysiloxane defoaming agent and an s-triazine preservative into the mixture, and uniformly mixing; and slowly adding the hydrophobically modified alkali swelling thickener, and uniformly mixing to obtain the high-water-resistance environment-friendly waterproof sealant.

In the step 3), the temperature of the soap solution before the mixing and grinding through the colloid mill is 80 ℃ by heating, and the temperature of the modified asphalt before the mixing and grinding through the colloid mill is 100 ℃ by heating; controlling the discharging temperature of the emulsified asphalt to be 50 ℃ in the mixing and grinding process of the colloid mill; the temperature of the mixing process in the step 4) and the step 5) is controlled between 50 ℃.

Example 5

The invention relates to a high-water-resistance environment-friendly waterproof sealant which is mainly prepared from the following components in parts by weight:

the preparation method of the high-water-resistance environment-friendly waterproof sealant comprises the following steps of:

1) weighing the raw materials according to the weight part ratio, adding an alkyl sulfonate emulsifier, long-chain fatty alcohol-polyoxyethylene ether and hydroxyethyl cellulose into river water, uniformly mixing to prepare a soap solution, and adjusting the pH value of the soap solution to 12;

2) heating 110# asphalt to 130 ℃, and stirring for 1 hour for later use;

3) mixing and grinding the soap solution obtained in the step 1) and the asphalt obtained in the step 2) for 1min by a colloid mill, and naturally cooling to room temperature to obtain emulsified asphalt;

4) slowly adding the hydrophobically modified nano-silica into the hydrophobically modified anionic acrylic latex, uniformly mixing the hydrophobically modified nano-silica and the hydrophobically modified anionic acrylic latex, adding the anionic polyethylene wax emulsion, and uniformly stirring to obtain modified anionic polymer latex;

5) slowly adding the emulsified asphalt prepared in the step 3) into the modified anionic polymer latex prepared in the step 4), and uniformly mixing; then adding an organic silicon defoaming agent and an isothiazolinone preservative into the mixture, and uniformly mixing; and slowly adding the hydrophobically modified alkali swelling associative thickener, and uniformly mixing to obtain the high-water-resistance environment-friendly waterproof sealant.

In the step 3), the temperature of the soap solution before mixing and grinding through a colloid mill is 30 ℃ by heating, and the temperature of the modified asphalt before mixing and grinding through the colloid mill is 150 ℃ by heating; controlling the discharging temperature of the emulsified asphalt to be 50 ℃ in the mixing and grinding process of the colloid mill; the temperature of the mixing process in the step 4) and the step 5) is controlled between 50 ℃.

Performance test experimental data:

high-water-resistance environment-friendly waterproof sealant performance test

1) The high-water-resistance environment-friendly waterproof sealing paste of each embodiment is subjected to relevant index detection according to detection methods in standards JGT 501-2016 (joint of building element) waterproof sealing paste, GBT 16777-2008 (test method for building waterproof coating) and JC1066-2008 (limit for harmful substances in building waterproof coating), and the detection results are shown in Table 1:

TABLE 1 high water resistance environmental protection waterproof sealing paste performance test results

The detection results of the bonding performance parameters in table 1 show that the high-water-resistance environment-friendly waterproof sealant has excellent bonding performance with various construction base layers (base surfaces).

2) In addition, the high-water-resistance environment-friendly waterproof sealing paste of each embodiment is stored in a sealed manner at room temperature for 6 months, has no bad phenomena such as demulsification, gelation and agglomeration, and has excellent storage stability.

Second, high water resistance environmental protection waterproof sealing paste water resistance test

The properties of the comparative example and the products of examples 1 to 5 were selected and compared, wherein the water absorption rate performance index was measured according to the method of 6.15 in GBT 19250-. From table 2, it can be seen that the product of the present application has excellent water resistance, and the water resistance can substantially meet the standards of the oil-based polyurethane product.

TABLE 2 test results of water resistance of high water resistance environmental protection waterproof sealant

Third, product harmful substance limit test

TABLE 3 test results of the amount of harmful substances in the product

As can be seen from Table 3, the volatile harmful substances of the product are few, and the product is absolutely safe and environment-friendly.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.