CN111100555A - Water-based penetration self-healing high polymer modified asphalt waterproof coating with hydrophobic surface and preparation method and application thereof - Google Patents

Abstract

The invention discloses a water-based penetration self-healing high polymer modified asphalt waterproof coating with hydrophobic surface, and a preparation method and application thereof. The coating disclosed by the invention mainly has the advantages of quick curing performance, self-healing performance, super-strong bonding strength and elongation, excellent water resistance and high and low temperature resistance, is suitable for various environments, can realize a good waterproof effect on building structures in any environment, is particularly suitable for projects of various extremely complex environments and complex scenes and waterproof projects of special areas and projects, solves the blank of materials in severe cold areas, and has a wide application range.

Description

Water-based penetration self-healing high polymer modified asphalt waterproof coating with hydrophobic surface and preparation method and application thereof

Technical Field

The invention relates to a waterproof material for buildings, in particular to a water-based penetration self-healing high polymer modified asphalt waterproof coating with hydrophobic surface, a preparation method and application thereof.

Background

In the civil engineering industry, the waterproof problem of buildings is a major concern, and the development of novel waterproof materials and the improvement of the performance of the waterproof materials are important researches because the leakage of buildings and structures seriously harms the property and life safety of people, wherein the asphalt-based waterproof coating is one of the important researches. At present, modifying asphalt by a modifier is one of the most effective ways for improving the performance of asphalt-based waterproof materials, and then preparing the asphalt by a special process. Meanwhile, as for the modified asphalt technology, the active blending modified asphalt technology becomes one of the current research hotspots and directions, the technology is totally divided into two types, one of the two types is modified polymer, namely functional groups capable of reacting with asphalt are introduced, the other type is that an auxiliary agent is added between the asphalt and the polymer, so that the asphalt and the polymer are subjected to chemical reactions such as crosslinking and grafting, the performance of the modified asphalt is improved by the technology, and the compatibility of the modified asphalt is also enhanced by chemical modification.

In china, modified asphalt lags behind in the early stages of development, and before the 60's of the 20 th century, coal asphalt and asphalt extracted from imported crude oil were the main sources of asphalt at that time. By the end of the 70 s, they began research work on adding waste rubber crumb to asphalt through the union research of the relevant units, and it is this opportunity that china has achieved some successful experience in modifying asphalt. In the 90 s, China began to select modified asphalt in the building waterproof industry, and the popularization and development of the modified asphalt in China are rapidly spread. The modification technology can obviously improve the performance of the asphalt-based waterproof coating, particularly the low-temperature flexibility, the elongation and the adhesion performance to a base layer of the asphalt-based waterproof coating, so that the comprehensive waterproof performance of the asphalt-based waterproof coating can be greatly improved, and the asphalt-based waterproof coating is widely applied to the present day.

For modified asphalt, the modifier is of great importance, and the types of the modified asphalt are various through long-term development and exploration, wherein the main types are thermoplastic rubbers, such as SBS and the like; resins such as PE, APP, etc.; rubber and mineral fillers. In recent years, the selection of inorganic nanoparticle modified asphalt materials also becomes a hotspot of related research, and the reason is that the complementarity of the inorganic nanoparticle modified asphalt materials is strong, so that the high-temperature and low-temperature performances of asphalt are greatly improved. Since the characteristics of the modifier are closely related to the type of the modifier, the modifier has different influences on the performance of the modified asphalt, and secondly, different processing techniques also have great influences on the performance of the modified asphalt, wherein the most significant influences are processing temperature, processing time and stirring speed, so that the preparation technique also needs to be adjusted correspondingly according to specific conditions.

The high polymer modified asphalt waterproof paint is prepared by modifying emulsified asphalt with synthetic high molecular polymer, and the high molecular polymer has good intermiscibility with the emulsified asphalt, so that the asphalt has certain characteristics, and the performance of the asphalt is improved. After the 80 s in the 20 th century, the polymer emulsion has been developed unprecedentedly, and particularly, the acrylic ester emulsion, including pure acrylic, vinyl acetate acrylic, tertiary acrylic, phenylpropyl and the like, is widely applied to the building waterproof coating due to comprehensive performance. The traditional iron pot boiling is transited to asphalt modification, and the asphalt becomes waterproof paint which can be directly brushed through technology upgrading. In addition, the waterproof paint has the advantages of low cost, environmental protection, no pollution, convenient construction, excellent durability, adhesive force, elongation and high and low temperature resistance, and is widely applied to waterproof projects of II-level, III-level and IV-level waterproof grades.

However, in northeast regions of high latitudes, the winter is cold for a long time, and some regions are in cold temperate zones, at present, no building waterproof material in national standards can effectively resist the influence of external stress at the temperature of-30 to-40 ℃, so that the development of the high-molecular emulsion modified asphalt waterproof coating which can be also applicable to the cold regions has important significance.

Disclosure of Invention

The purpose of the invention is as follows: aiming at the problems in the prior art, the invention provides the water-based penetration self-healing high polymer modified asphalt waterproof coating with the surface having hydrophobicity. The invention is suitable for projects of various extreme environments and some complex scenes on the building repair market, and waterproof projects of some special areas and projects, especially underground projects, and can form seamless complete waterproof coating no matter complex and irregular parts such as various planes, inclined planes, vertical planes, irregular surfaces and the like, thereby preventing leakage. And large-scale machining is not needed, the production efficiency is high, the investment is less, the construction is convenient, heating and boiling are not needed, the environment is protected, no pollution is caused, and the labor cost is greatly reduced.

The invention also provides a preparation method, application and a using method of the water-based penetration self-healing high polymer modified asphalt waterproof coating with the surface having hydrophobicity.

The technical scheme is as follows: in order to achieve the purpose, the water-based penetration self-healing high polymer modified asphalt waterproof coating with hydrophobic surface is mainly prepared from the following raw materials in parts by weight: 60-80 parts of emulsified asphalt, 60-80 parts of acrylate emulsion, 1.5-2.0 parts of alkali swelling thickener, 0.25-0.75 part of polyurethane thickener, 1.0-1.5 parts of dispersant, 0.25-0.75 part of multifunctional assistant, 0.5-1.0 part of defoamer, 0.25-0.75 part of bactericide, 60-80 parts of heavy calcium carbonate powder, 20-30 parts of bentonite, 40-50 parts of organosilicon hydrophobic agent, 30-40 parts of sodium silicate, 0.25-0.75 part of photoinitiator, 0.25-0.75 part of cross-linking agent and 40-50 parts of water.

Wherein the emulsified asphalt is anionic emulsified asphalt, cationic emulsified asphalt or nonionic emulsified asphalt; is prepared from multiple surfactants, cationic shale inhibitor and asphalt with a certain softening point through special processing. The micron-sized positively charged asphalt particles are easily adsorbed on negatively charged solid particles to participate in the formation of mud cakes and improve the quality of the mud cakes, and the particles and the cationic shale inhibitor can enter micro cracks of a well wall to generate adhesion and mutual aggregation, so that the effects of plugging, bridging, expansion prevention, collapse prevention, water loss reduction and oil-gas layer protection are achieved.

The acrylate emulsion is milky viscous liquid, and is prepared by multi-polymerization of various acrylic acid, methacrylic acid, methyl methacrylate, acrylates and functional auxiliaries and copolymerization through an optimized process. Fine grain size, high gloss, excellent weather resistance, excellent anti-tack property and wide applicability.

The alkali swelling thickener is a copolymer emulsion thickener of acrylic acid and methacrylic acid, is acidic, and can achieve a thickening effect only by neutralizing with alkali or ammonia water to a pH value of 8-9. The thickening mechanism is that the thickening agent is dissolved in water, and a molecular chain is extended to be a rod shape from a spiral shape through the same-polarity electrostatic repulsion force of carboxylate ions, so that the viscosity of a water phase is improved.

The polyurethane thickener is an associative thickener, and hydrophilic groups and hydrophobic groups are introduced into the molecular structure of the thickener, so that the thickener presents certain properties of a surfactant. When the concentration of the aqueous solution exceeds a certain specific concentration, micelles are formed, and the micelles and polymer particles are associated to form a network structure, so that the viscosity of the system is increased.

The dispersing agent is a polycarboxylate sodium salt dispersing agent, has high dispersibility, maximum pigment bearing capacity, excellent dispersibility for titanium dioxide, calcium carbonate and china clay, excellent performance of the prepared coating, strong dispersing power for high hydrophobic substances such as organic pigments and the like, and has the characteristics of small using amount, high efficiency, small viscosity, low grinding viscosity, wide using amount range, good storage stability of a dispersing system and the like.

Wherein the defoaming agent is a silicone defoaming agent. It is widely used in latex, emulsion and water-borne coatings.

The bactericide is an isothiazolinone derivative, is an efficient, low-toxicity and environment-friendly coating preservative, and the raw materials of the product contain water and nutrients, so that the product is very easy to be polluted by bacteria, and thus the viscosity of the coating is reduced, and the coating is rotten, gasified, demulsified and has other harmful physical and chemical changes.

The coarse whiting powder is prepared by grinding natural carbonate minerals such as calcite, marble and limestone, and is added into the coating as a large amount of powdery inorganic filler, so that the solid content of a finished product is increased, the high cost of the high-molecular emulsion is saved, and the cost can be greatly reduced.

The bentonite is an inorganic mineral organic ammonium compound, and is prepared by inserting an organic covering agent through an ion exchange technology by utilizing the lamellar structure of montmorillonite and the characteristic that the montmorillonite can be swelled and dispersed into colloidal clay in water or an organic solvent. The organic bentonite can form gel in various organic solvents, oils and liquid resins, has good thickening property, thixotropy, suspension stability, high-temperature stability, lubricity, film-forming property, water resistance and chemical stability, and has important application value in the paint industry.

Preferably, the organosilicon water repellent is a siloxane water repellent, is mainly used for porous inorganic base layers (such as concrete, ceramic tiles, clay bricks, stone materials and the like), and is used for water resistance, water impermeability, stain resistance, wind resistance and the like of brick walls, facing brick outer walls, coatings and natural stone facing outer walls. The outer wall surfaces such as ceramic tiles are waterproof, and the original color of the substrate is not changed. The waterproof and air-permeable wall does not block capillary holes and micropores on the surface of a building, does not influence the diffusion of moisture in the wall and in a room, and is moisture-proof and air-permeable. Namely, a layer of air-permeable hydrophobic film which can not be observed by naked eyes is formed on the outer wall surface, so that the water is prevented from wetting and is immersed into the wall body, and the diseases of wetting, mildewing, blackening, shedding and the like of the inner wall surface are prevented.

Wherein the sodium silicate is a sodium silicate aqueous solution with a modulus of more than 3.0 and a Baume degree of 37-42 at 20 ℃. It is a main component and is also a crystallization precipitator, and the function of the crystallization precipitator is that the crystallization precipitator can perform chemical reaction with calcium ions in a concrete internal pore solution to generate CaSiO₃The crystal fills cracks and pores, and the compactness and the waterproof effect are improved.In addition, sodium silicate can react with a hydration product Ca (OH)2 in concrete to generate C-S-H (xCaO. SiO)₂·yH₂O) a gel waterproof layer, and the waterproof function of the concrete is improved.

Preferably, the photoinitiator is a benzoin initiator, preferably 2, 2-dimethoxy-acetophenone, which has high initiation speed and low cost, and is also called a photosensitizer or a light curing agent, and is a compound capable of absorbing energy with a certain wavelength in an ultraviolet region (250-420 nm) or a visible light region (400-800 nm) to generate free radicals and the like, so as to initiate polymerization, crosslinking and curing of monomers.

The cross-linking agent is methyl trimethoxy silane or double-end acrylamide propyl polysiloxane. The cross-linking agent is also called bridging agent and is an important component of the hydrocarbon-polymerized photoresist, the photochemical curing action of the photoresist depends on the cross-linking agent with double photosensitive functional groups to participate in the reaction, and after exposure, the cross-linking agent generates double free radicals which react with hydrocarbon-polymerized resin to form bridge bonds between polymer molecular chains and become insoluble substances with three-dimensional structures. The crosslinking agent is generally a substance having a plurality of functional groups in a molecule or a compound having a plurality of unsaturated double bonds in a molecule. Can be fed together with the monomer, and crosslinked to a certain extent after polymerization, so that the product becomes insoluble crosslinked polymer, or a certain number of functional groups (or double bonds) can be retained in linear molecules, and then a specific substance is added for crosslinking. The cross-linking agent is mainly used in the high molecular material, the molecular structure of the high molecular material is like a long line, the strength is low when the high molecular material is not cross-linked, the high molecular material is easy to break, and the high molecular material has no elasticity, and the cross-linking agent has the function of generating chemical bonds among linear molecules to enable the linear molecules to be mutually connected to form a net structure, so that the strength and the elasticity of the rubber are improved.

Preferably, the water is deionized water, and the resistivity is greater than or equal to 10 megaohm-cm.

The preparation method of the water-based penetration self-healing high polymer modified asphalt waterproof coating with hydrophobic surface comprises the following steps:

weighing the components according to the formula proportion, then adding water and an organic silicon water repellent into a homogenizer, then sequentially adding a dispersing agent, a multifunctional auxiliary agent, a bactericide, heavy calcium carbonate powder, bentonite, an acrylate emulsion, emulsified asphalt, a defoaming agent, a polyurethane thickener, an alkali swelling thickener and sodium silicate into water to prepare a mixed solution, then adding the bentonite, a photoinitiator and a crosslinking agent, fully and uniformly stirring the mixed solution in the homogenizer, finally removing impurities in the coating through filtration treatment, and filtering the treated clear solution to obtain the high polymer modified asphalt waterproof coating. All raw materials are commercially available building materials or industrial auxiliaries.

The invention relates to an application of a water-based permeable self-healing high polymer modified asphalt waterproof coating with hydrophobic surface in building waterproofing and leakage prevention.

Further, the specific use method of the application comprises the following steps:

firstly, preprocessing an applied building base surface, wherein the preprocessing comprises the following specific steps: removing oil stains or other impurities on the surface of the building base surface, keeping the surface dry, then applying the high polymer modified asphalt waterproof paint to the building base surface by adopting a coating or spraying construction mode, repeatedly coating or spraying for 2-3 times, and drying and maintaining for 2 days or more.

The design principle of the water-based penetration self-healing high polymer modified asphalt waterproof coating with the hydrophobic surface is that a cross-linking agent undergoes a light cross-linking reaction under the action of a photoinitiator to promote the curing speed of the coating, and the adopted cross-linking agent contains olefin polysiloxane and is modified by a copolymerization method of acrylate (PDDA), so that the physical properties of the coating are improved, and particularly the high and low temperature resistance, the bonding strength and the elongation are obviously improved. The coating is a single component, the material is pasty liquid before meeting with sunlight, once the material is illuminated, a cross-linking agent in the material performs a photocrosslinking reaction under the action of a photoinitiator, the photoinitiator is in a macromolecular chain, the formation of each chain link is performed through photochemical reaction, the material can be directly subjected to monomolecular decomposition reaction after being excited by light to generate effective free radicals, the benzoin is excited to a T1 state after absorbing energy and then decomposed into two free radicals, and the photopolymerization chain reaction is a process of absorbing a photon to cause a large number of monomer molecules to polymerize into macromolecules. In terms of reaction kinetics, the cure rate decreases from the addition of the crosslinking agent to the absence of the crosslinking agent. This is because the reaction of the system is a simple chain extension reaction without adding a crosslinking agent, so that the curing is slow, and the polymerization of the system is a networking process with the addition of a crosslinking agent, so that the curing is fast. The crosslinking reaction after the crosslinking agent is added is free radical polymerization reaction, so the curing speed is high; and silane crosslinking PDDA involves both grafting and crosslinking processes. During the grafting process, the PDDA loses hydrogen ions under the action of radicals generated by pyrolysis of the initiator to generate radicals on the backbone, which react with the-CH ═ CH groups of the vinyl silane to form silane-grafted PDDA. The silane grafted PDDA forms silanol (Si-OH) under the action of water and a crosslinking catalyst, and the Si-OH is further condensed to form Si-O-Si bonds so that the PDDA is crosslinked. Compared with other processes, the technology has the advantages of low investment on equipment, low production cost, high production efficiency, multifunctional manufacturing process and higher use efficiency of the material, the construction period is greatly shortened due to the rapid solidification of the material, on the basis, the physical properties of the material are increased or decreased, for example, the same type of material in the market can hardly realize decoration construction such as tiling on the surface of the material, and the material can not worry about the problem that tiles fall off due to the super-strong bonding strength, meanwhile, the Polypropylene Plastic (PP) has good engineering plastic property and is widely used, but polypropylene and other thermoplastic polyolefin plastics are difficult to adhere to paint, particularly water-based paint, the adhesive force is poorer, and the technology greatly improves the adhesive force between the material and the plastic, so the material can be effectively used at the root part of a pipe in a toilet, the falling-off is not worried about. In addition, the invention solves the blank of the material in severe cold areas due to the super-strong low temperature resistance of the material.

Has the advantages that: compared with the prior art, the invention has the following advantages:

1. the modified paint is suitable for various extremely complex environments, and the high-molecular emulsion used in the invention has good compatibility with emulsified asphalt, so that a coating film of the modified paint has good extensibility, rebound resilience, water resistance, good low-temperature flexibility, alkali resistance and good adhesive force performance, is a component which obviously influences various performances of the paint, and can achieve good waterproof effect on building structures in any environment.

2. The organic silicon water repellent is a siloxane water repellent, wherein the structural characteristics of the active ingredients are a plurality of organic silicon units, usually 3-6, and the organic silicon water repellent is flowable and transparent liquid. Can be dissolved in most solvents and can quickly form a silicone resin network structure. Because the active ingredients are not volatilized, the problems of easy volatilization, easy environmental pollution and ingredient loss caused by directly using silane are solved, and the siloxane also has good permeability. Especially when the alkyl is long-chain alkyl, the formed silicone resin network has good alkali resistance and can play a waterproof function for a long time. Because of the strong chemical affinity between the organosilicon compound and the inorganic silicate, the surface characteristics of the silicate material can be effectively changed. The siloxane with reactivity in organosilicon can form hydrogen bond through interaction of specific conditions, and can react with hydroxyl in the substrate chemically to form silane chain with-Si-R-group at the end, the above-mentioned function produces firm hydrophobic reticular siloxane molecular film, the surface tension is very low, and can be uniformly distributed on the porous expanded perlite microporous wall, and does not seal its capillary channel, and does not affect the discharge of internal water in the drying process. After drying, the water meets water, the contact angle of the water on the capillary tube wall is 100-130 degrees, so that the water dropped on the capillary tube wall becomes bead-shaped and cannot permeate into the particles, and the capillary tube has a waterproof effect.

3. The sodium silicate in the invention has the function of endowing the coating with permeability, silicate ions in the coating can chemically react with calcium ions in a pore solution in concrete to generate CaSiO3 crystals to fill cracks and pores, so that the effects of increasing compactness and water resistance are achieved, pores are blocked, and the binding force between the coating and a base surface is increased. In addition, sodium silicate can also react with the hydration products Ca (OH) in concrete₂Act to generate C-S-H (xCaO. SiO)₂·yH₂O) a gel waterproof layer, and the waterproof function of the concrete is improved.

4. The bentonite in the invention has the function of endowing the coating with self-healing type, the organic bentonite absorbs water to swell, gel is formed in the coating, and the coating has good thickening property, thixotropy, suspension stability, high temperature stability, lubricity, film forming property, water resistance and chemical stability, and when the surface of the coating is damaged by a small area, once the damaged part is contacted with water, the damaged part of the coating will swell, so that the wound is self-healed.

5. The cross-linking agent of the invention performs photopolymerization under the action of the photoinitiator, and is characterized in that the activation energy required by the photopolymerization is low, so that the cross-linking agent can be performed in a large temperature range, and is particularly easy to perform low-temperature polymerization, so that the coating has important significance in northeast regions of high latitude in China, the winter is very cold, and parts of regions are in cold temperature zones.

6. The water-based penetration self-healing high polymer modified asphalt waterproof coating with the hydrophobic surface mainly has the advantages of quick curing performance, self-healing performance, super-strong bonding strength and elongation, excellent water resistance and high and low temperature resistance, solves the problems that workers cannot perform secondary or tertiary coating on a plane in a short time and hang on a vertical surface, also solves the problem that the vertical surface coated with the material cannot be used for sticking bricks and pipe root parts, can solve most of problems only by using the material, greatly shortens the construction period from the whole engineering, solves the blank of the material in a severe cold area, and has wide application range.

7. The modified paint of the invention has simple preparation, easily obtained raw materials, wide production and application, convenient use, and is suitable for various extreme environments and projects of complex scenes in the market of building repair, and waterproof engineering of special areas and engineering, especially underground engineering. And large-scale machining is not needed, the production efficiency is high, the investment is less, the construction is convenient, heating and boiling are not needed, the environment is protected, no pollution is caused, and the labor cost is greatly reduced.

Detailed Description

The following examples are further illustrated.

All raw materials of the invention are commercial building materials or industrial auxiliary agents.

The raw materials used in the following examples are as follows:

emulsified asphalt: anionic emulsified asphalt, cationic emulsified asphalt, and nonionic emulsified asphalt (Nantong Rongcheng road and bridge materials science and technology development Co., Ltd., model: RC-YLZLRQ, RC-PLZRHL Q, RC-FLZRHL Q, solid content 60%)

Acrylate emulsion (Donglian North science and technology Co., Ltd., BA-2100, 55% solids content)

Alkali swelling thickener (Jiangsu Guangzheng chemical industry Co., Ltd., type: G-935)

Polyurethane thickener (Jiangsu Guangzheng chemical industry Co., Ltd., type G-400)

Multifunctional auxiliary agent (Jiangsu Guangzheng chemical industry Co., Ltd., type G-95)

Ground calcium carbonate powder (Changxing Tianhe building materials Co., Ltd., specification: 600 mesh)

Sodium silicate: aqueous sodium silicate solution (Zhejiang Silico New Material science and technology Co., Ltd., solid content 25%)

Photoinitiator (2): 2, 2-dimethoxy-phenylacetophenone (Shanghai coconut Biotech Co., Ltd., type: 24650-42-8)

Dispersing agent: polycarboxylate sodium salt dispersant (Jiangsu Guangzheng chemical industry Co., Ltd., model number: G-5040)

Defoaming agent: silicone antifoaming agent (Jiangsu Guangzheng chemical industry Co., Ltd., type: C15)

And (3) bactericide: isothiazolinone derivative (Jiangsu Guangzheng chemical industry Co., Ltd., type: GF)

An organic silicon water repellent agent: sodium methyl silicate solution or potassium methyl silicate solution (Zhejiang Silico New Material science and technology Co., Ltd., solid content 25%)

Bentonite: natural sodium bentonite (Wuxi Dinglong mining Co., Ltd., 200 mesh)

A crosslinking agent: methyltrimethoxysilane (Hangzhou Wolman new materials technology, Inc.), and bisacrylamidopropyl polysiloxane (Hangzhou Wolman new materials technology, Inc.).

Examples 1 to 4

The formulations used in examples 1 and 2 are for general building environments and the formulations used in examples 3 and 4 are for extremely complex and harsh building environments.

The general environment refers to most building environments, and the extremely complex and severe building environment refers to the building environment in severe cold and low temperature areas, or the high temperature environment of some special factories, the condition that the building is easy to deform, the building monomer with odd shape, uneven base surface, the acid or alkaline area and the like.

The specific formulation is shown in table 1.

TABLE 1

Example 5

The surface has hydrophobic aqueous infiltration self-healing type high polymer modified asphalt waterproof coating, according to the weight portion:

60 parts of anionic emulsified asphalt, 60 parts of acrylate emulsion, 1.5 parts of alkali swelling thickener, 0.25 part of polyurethane thickener, 1.0 part of dispersant, 0.25 part of multifunctional assistant, 0.5 part of defoamer, 0.25 part of bactericide, 60 parts of ground calcium carbonate powder, 20 parts of bentonite, 40 parts of organosilicon water repellent methyl potassium silicate solution, 30 parts of sodium silicate, 0.25 part of photoinitiator, 0.25 part of cross-linking agent double-end acrylamide propyl polysiloxane and 40 parts of water.

Example 6

The surface has hydrophobic aqueous infiltration self-healing type high polymer modified asphalt waterproof coating, according to the weight portion:

80 parts of nonionic emulsified asphalt, 80 parts of acrylate emulsion, 2.0 parts of alkali swelling thickener, 0.75 part of polyurethane thickener, 1.5 parts of dispersant, 0.75 part of multifunctional assistant, 1.0 part of defoamer, 0.75 part of bactericide, 80 parts of ground calcium carbonate powder, 30 parts of bentonite, 50 parts of organosilicon water repellent methyl potassium silicate solution, 40 parts of sodium silicate, 0.75 part of photoinitiator, 0.75 part of cross-linking agent double-end acrylamide propyl polysiloxane and 50 parts of water.

Example 7

Weighing the components according to any one of the formula proportions in the embodiments 1-5, then adding water and an organic silicon water repellent into a homogenizer, then sequentially adding a dispersing agent, a multifunctional assistant, a bactericide, heavy calcium carbonate powder, an acrylate emulsion, emulsified asphalt, a defoaming agent, a polyurethane thickener, an alkali swelling thickener and sodium silicate into water to prepare a mixed solution, then adding bentonite, a photoinitiator and a cross-linking agent into the mixed solution, fully and uniformly stirring the mixed solution in the homogenizer, finally removing impurities in the coating through filtering treatment, and filtering the treated clear solution to obtain the water-based penetration self-healing high polymer modified asphalt waterproof coating with hydrophobic surface.

Example 8

Firstly, preprocessing an applied building base surface, wherein the preprocessing comprises the following specific steps: removing oil stains or other impurities on the surface of a building base surface, keeping the surface dry, then applying the water-based permeable self-healing high polymer modified asphalt waterproof coating with the surface having hydrophobicity to the building base surface by adopting a coating or spraying construction mode, coating or spraying one kilogram per square, repeatedly coating or spraying for 2-3 times, and drying and maintaining for 2 days or more.

Test example 1

The performance of example 2 of the present invention was tested according to the JC/T408-2005 "water-emulsion asphalt waterproof coating" and JC/T864-2008 "polymer emulsion waterproof coating for building" standards, the two standards were tested in the same manner, but the requirements for the test materials were different, the test results were compared with the two standards at the same time, and the test results are shown in table 2.

TABLE 2

The results of the tests of example 2 and comparative examples 1 to 3 in table 1 show that the properties of example 2 are the most excellent, and the materials added with the crosslinking agent and the photoinitiator have the advantages of faster curing speed and better physical properties, while the materials of comparative examples 1 to 3 without the crosslinking agent or the photoinitiator or both have the advantages of obviously reduced curing speed and 8 to 24 hours of actual drying time.

It can also be seen from the data in table 2 above: the water-based penetration self-healing high polymer modified asphalt waterproof coating with the hydrophobic surface has excellent comprehensive performance, the bonding strength and the elongation at break far exceed the requirements of JC/T408-2005 standard, and the performance after alkali treatment, heat treatment and ultraviolet treatment is still excellent.

In conclusion, the brand new water-based penetration self-healing type high polymer modified asphalt waterproof coating with hydrophobic surface mainly has the advantages of fast curing performance, self-healing performance, super-strong bonding strength and elongation, excellent water resistance and high and low temperature resistance, solves the problems that workers cannot perform secondary or tertiary coating on a plane in a short time and hang on a vertical surface, also solves the problems that the vertical surface coated with the material cannot be used for sticking bricks and a pipe root part, can solve most of problems only by the worker, greatly shortens the construction period from the whole engineering, solves the blank of the material in a severe cold area, and has wide application range.

The above description is only exemplary of the present invention. It is apparent that the present invention is not limited to the above embodiment examples, and any modifications and changes made to the present invention within the spirit of the present invention and the scope of the claims should be construed as the scope of the present invention.

Claims (10)

1. The water-based penetration self-healing high polymer modified asphalt waterproof coating with hydrophobic surface is characterized by being mainly prepared from the following raw materials in parts by weight: 60-80 parts of emulsified asphalt, 60-80 parts of acrylate emulsion, 1.5-2.0 parts of alkali swelling thickener, 0.25-0.75 part of polyurethane thickener, 1.0-1.5 parts of dispersant, 0.25-0.75 part of multifunctional assistant, 0.5-1.0 part of defoamer, 0.25-0.75 part of bactericide, 60-80 parts of heavy calcium carbonate powder, 20-30 parts of bentonite, 40-50 parts of organosilicon hydrophobic agent, 30-40 parts of sodium silicate, 0.25-0.75 part of photoinitiator, 0.25-0.75 part of cross-linking agent and 40-50 parts of water.

2. The water-based penetrating self-healing polymer modified asphalt waterproof coating material with hydrophobic surface according to claim 1, wherein the emulsified asphalt is preferably anionic emulsified asphalt, cationic emulsified asphalt or nonionic emulsified asphalt.

3. The water-based permeable self-healing high polymer modified asphalt waterproof coating with hydrophobic surface as claimed in claim 1, wherein the acrylate emulsion is milky viscous liquid and is polymerized by multiple acrylic acid, methacrylic acid, methyl methacrylate, acrylate and functional auxiliary agent; the alkali swelling thickener is a copolymer emulsion thickener of acrylic acid and methacrylic acid.

4. The water-based penetrating self-healing high polymer modified asphalt waterproof coating with hydrophobic surface as claimed in claim 1, wherein the polyurethane thickener is an associative thickener; the dispersant is a sodium polycarboxylate dispersant.

5. The water-based penetrating self-healing polymer modified asphalt waterproof coating material with hydrophobic surface according to claim 1, wherein the defoaming agent is a silicone defoaming agent; the organosilicon water repellent is a siloxane water repellent.

6. The water-based penetrating self-healing polymer modified asphalt waterproof coating material with hydrophobic surface as claimed in claim 1, wherein the photoinitiator is benzoin initiator.

7. The water-based penetrating self-healing high polymer modified asphalt waterproof coating with the hydrophobic surface as claimed in claim 1, wherein the cross-linking agent is methyl trimethoxy silane or bis-terminal acrylamido propyl polysiloxane.

8. The preparation method of the water-based penetration self-healing high polymer modified asphalt waterproof coating with hydrophobic surface according to claim 1, which is characterized by comprising the following steps:

weighing the components according to the formula proportion, then adding water and an organic silicon water repellent into a homogenizer, then sequentially adding a dispersing agent, a multifunctional auxiliary agent, a bactericide, heavy calcium carbonate powder, an acrylate emulsion, emulsified asphalt, a defoaming agent, a polyurethane thickener, an alkali swelling thickener and sodium silicate into water to prepare a mixed solution, then adding bentonite, a photoinitiator and a crosslinking agent, fully and uniformly stirring the mixed solution in the homogenizer, finally removing impurities in the coating through filtration treatment, and filtering the treated clear solution to obtain the high polymer modified asphalt waterproof coating.

9. The application of the water-based permeable self-healing high polymer modified asphalt waterproof coating with hydrophobic surface of claim 1 in building waterproofing and leakage prevention.

10. The application according to claim 9, wherein the specific using method of the application comprises the following steps:

firstly, preprocessing an applied building base surface, wherein the preprocessing comprises the following specific steps: removing oil stains or other impurities on the surface of the building base surface, keeping the surface dry, then applying the high polymer modified asphalt waterproof paint to the building base surface by adopting a coating or spraying construction mode, repeatedly coating or spraying for 2-3 times, and drying and maintaining for 2 days or more.