WO2016008372A1

WO2016008372A1 - Bridged-type waterproof coating material, and production method and use therefor

Info

Publication number: WO2016008372A1
Application number: PCT/CN2015/083497
Authority: WO
Inventors: 卢桂才; 朱方伍; 伍盛江; 郭文雄; 陈立斌; 周为为
Original assignee: 广西金雨伞防水装饰有限公司
Priority date: 2014-07-12
Filing date: 2015-07-07
Publication date: 2016-01-21
Also published as: CN105273507A

Abstract

A waterproof coating material, comprising the following raw materials in the following parts by weight: a rubber latex 20-60, an emulsified asphalt 20-60, and a waterproof bridging agent 0.2-4. The waterproof bridging agent may be any one of a silane-type waterproof bridging agent, a bimetallic waterproof bridging agent, a lignin waterproof bridging agent, a tin waterproof bridging agent, a zirconium waterproof bridging agent, an organophosphate waterproof bridging agent or a rare earth waterproof bridging agent or a combination thereof.

Description

Bridge type waterproof coating and production method and application thereof

Technical field

The invention relates to a waterproof coating, which is a waterproof coating capable of chemically reacting with cement concrete to produce chemical cross-linking, and a production method and application thereof.

Background technique

The water-based rubber waterproof coating is a water-repellent coating material which is mainly composed of a polymer material as a film-forming material, an emulsifier, water and some additives, and then processed through a special process. It has excellent high elasticity, excellent high and low temperature properties and water resistance. The rubber waterproof coating has excellent performance, and the disadvantage is that the price is relatively expensive. Asphalt is a kind of organic cementing material which is waterproof, moisture-proof, anti-corrosive and low-cost. However, asphalt is easy to flow at high temperature, brittle and crack at low temperature, and asphalt is solid at normal temperature, which is inconvenient to construct. Therefore, people make emulsified asphalt or emulsified modified asphalt. And other products to use. Emulsified asphalt is a liquid asphalt that produces oil-in-water or water-in-oil under the action of certain processes, and is often used for waterproofing of bridges, roads and buildings. Emulsified modified asphalt is a waterproofing coating made of rubber modified asphalt, emulsifier, water, solvent and some additives. It has better performance than emulsified asphalt. The waterproofing mechanism of the above waterproof coating is to apply a waterproof coating on the surface of the civil structure. After the solvent of the coating is volatilized, a hydrophobic organic coating is formed on the surface of the civil structure, thereby waterproofing. Since the adhesion between the waterproof layer and the base surface is based on the physical adsorption force, the bonding strength between the waterproof layer and the base surface is relatively low, and the peeling is easily caused by the thermal expansion and contraction of the base surface, thereby destructing the waterproof layer and causing flaws. Water, water leakage, loss of water resistance.

The bonding effect between the waterproof layer and the base surface of the current waterproof material can only rely on weak physical adsorption. Lu Guicai (Guangxi Jinyu Umbrella Waterproof Decoration Co., Ltd.) and others can chemically react with the cement concrete base surface to produce a strong Chemically bonded waterproof bridging agent, made of modified asphalt waterproofing material with excellent performance, such as Chinese patent: application (patent) number: CN200910114456.X, name: chemical cross-linking with concrete and physical co-bonding Waterproof membrane; public (announcement) number: CN101694114A application (patent): Guangxi Jinyu Umbrella Waterproof Decoration Co., Ltd., discloses a waterproof membrane which can be chemically crosslinked and physically bonded to cement concrete. The waterproof glue used is a waterproof bridging agent which can be chemically cross-linked with cement concrete in the modified asphalt, and the waterproof bridging agent is polymethylethoxysilane or sodium polynaphthalene sulfonate. salt. Since the reactive groups contained in these waterproof bridging agents can chemically crosslink with cement concrete, the modified asphalt rubber has strong adhesion to the base surface and is irreversible, so the waterproof performance is extremely outstanding. It can be constructed in a humid environment, construction is very simple, and construction efficiency is very high.

However, there are no waterproof coatings on the market that can react chemically with the cement concrete base.

Summary of the invention

The object of the present invention is to disclose a bridge-type waterproof coating, which is a rubber asphalt-based waterproof coating capable of chemically reacting with a concrete base surface to produce chemical cross-linking, and the waterproof layer formed by the coating is adhered to the cement concrete base surface. The knot strength is high, the water resistance is significantly improved, and the waterproofing is more durable and reliable.

The technical solution of the present invention is:

Bridge-type waterproof coating, the composition of which includes the following parts by weight:

Rubber latex 20~60;

Emulsified asphalt 20~60;

Waterproof bridging agent 0.2~4;

The rubber latex is any one of natural rubber latex, styrene butadiene rubber latex, neoprene latex, SBS rubber latex or polyacrylate or a combination thereof. The rubber latex described above is available on the market and can be produced by the manufacturer. The production method is as follows: the rubber is dissolved in an organic solvent, and water, an emulsifier, a thickener, a filler, and the like are added, and a uniform emulsion is obtained by a conventional stirring method such as vigorous stirring or a grinding action of a colloid mill. For special needs, it is also necessary to add functional additives such as anti-aging agents and leveling agents.

The emulsified asphalt is a petroleum asphalt, an emulsifier, a coating auxiliary agent (a thickener, a leveling agent, a drier, a defoaming agent, an anti-skinning agent, etc.) and a water treated by a high-speed emulsifier to obtain a solid content of 40. ~70% asphalt emulsion is available on the market and can be produced by itself. Petroleum asphalt is generally selected from models 50 to 130.

The emulsified asphalt is a cationic emulsified asphalt, a nonionic emulsified asphalt or an anionic emulsified asphalt.

The cationic emulsified asphalt comprises an emulsified asphalt prepared by using a cationic emulsifier such as an alkyl polyamine, an amine oxide, a quaternary ammonium salt, an amidoamine, an imidazoline or a lignan;

The non-ionic emulsified asphalt includes an emulsified asphalt prepared from a nonionic emulsifier such as an ether group, an ester group, an amide or a heterocyclic milk;

The anionic emulsified asphalt includes an emulsified asphalt prepared from a carboxylate type, a sulfonate type, and a sulfate type anionic emulsifier.

It is important to note that most anionic emulsifiers react with cationic emulsifiers to react and lose emulsification. They are generally nonionic and cationic or nonionic and anionic. Cationic emulsifiers, such as octadecyltrimethylammonium chloride, cetyltrimethylammonium chloride, cetyltributylammonium chloride, etc., have strong emulsification effect on asphalt, preferably cationic emulsification The agent is an asphalt emulsifier. Some special products also need to add functional additives such as anti-aging agents, leveling agents and reinforcing agents. In order to reduce the production cost, a certain amount of filler such as limestone powder, kaolin, bentonite or the like may be added without deteriorating the performance of the product.

The one end of the waterproof bridging agent can be reacted with the unsaturated C=C double bond, carboxyl-COOH, hydroxyl-OH and the like in the rubber and asphalt materials, and the other end and the hydroxyl group generated during the hydration of the cement or Acid radicals form chemical bonds, and The concrete is chemically cross-linked, and a waterproof bridge is built. The coating and the cement are tightly integrated into one body. The relevant parts have a chemical bond function, which acts as an irreversible bond after solidification. At the same time, the asphalt and the rubber combine to solidify the coating. After that, the asphalt adhesion is maintained, and the rubber has excellent elasticity and weather resistance. The coating is a water-based environmentally friendly coating with convenient construction and excellent social and economic benefits.

Such materials may be silane waterproof bridging agents, bimetallic waterproof bridging agents, lignin waterproof bridging agents, tin waterproof bridging agents, zirconium waterproof bridging agents, phosphate ester waterproofing bridging agents or rare earth waterproof bridging agents. Any one of them or a combination thereof. The bimetallic waterproof bridging agent is an aluminum zirconate waterproof bridging agent; the lignin waterproof bridging agent is a lignin macromolecular organic mixture produced by the paper industry, and the lignin molecule contains a plurality of hydroxyl groups. a reactive group such as a carboxyl group or a methoxy group, which can be chemically reacted with a silicate in cement concrete; the tin waterproof crosslinking agent is tin tetrachloride, trioctyltin chloride or dioctyltin dichloride; The zirconium water-proof bridging agent is tetra-n-butyl zirconate, tetrapentyl zirconate or tetraoctyl zirconate; the phosphate cross-linking agent is di-n-butyl methyl phosphate, two positive Butylethyl phosphate, dioctylmethyl phosphate or dioctylethyl phosphate; the rare earth water-repellent bridging agent is obtained by reacting an organic acid with a rare earth oxide in a molar ratio of about 1:1. The product is usually a rare earth lauric acid compound or a rare earth stearic acid compound. Rare earths have strong chelating properties and form very strong chemical chelating bonds with silicate compounds in cement.

The silane-based water-repellent bridging agent described above is any one of an alkenylsiloxane, an aminosiloxane, a chloroalkylsiloxane, a methacryloxysiloxane or an epoxysiloxane. Or their compositions.

The alkenylsiloxane is vinyltrichlorosilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris(β-methoxyethoxy)silane, vinyltriacetic acid Silyl, tri-tert-butoxyvinylsilane, vinyltri-tert-butylperoxysilane, allyltrimethoxysilane or allyltriethoxysilane;

The aminosilicone is aniline methyltrimethoxysilane, aniline methyltriethoxysilane, N-(4-aminobutyl)aminomethyltriethoxysilane, γ-aminopropyltrimethoxy Silane, (3-aminopropyl)triethoxysilane, N-methyl-3-aminopropyltrimethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane, γ-(β -aminoethyl)aminopropyltrimethoxysilane, γ-(β-aminoethyl)aminopropylmethyldimethoxysilane, γ-diethylenetriaminopropyltrimethoxysilane, 3-aminobenzene Trimethoxysilane, 2-(4-N-benzylethylenediamine)ethyltrimethoxysilane or N,N-bis(2-hydroxyethyl)-3-aminopropyltriethoxysilane .

The chloroalkylsiloxane is γ-chloropropyltrichlorosilane, γ-chloropropyltrimethoxysilane, γ-chloropropyltriethoxysilane or 2-(4-chlorinated benzyl)B. Trimethoxysilane.

The methacryloxysiloxane is γ-methacryloxypropyltrichlorosilane, γ-methacryloxypropyltrimethoxysilane, γ-methacryloxypropyl three (β-methoxyethoxy)silane or γ-methacryloxypropyltris(trimethylsiloxy)silane.

The epoxy siloxane is 3-(2,3 epoxypropoxy)propyltrimethoxy, β-(3,4-epoxycyclohexyl) Ethyltrimethoxysilane, β-(3,4-epoxycyclohexyl)ethyltriethoxysilane or β-(3,4-epoxycyclohexyl)ethylmethyldiethoxysilane.

The following is the reaction mechanism:

1. Taking the olefin-based silane in the silane-based water-repellent bridging agent as an example, when one end of the olefin-based silane is mixed with the asphalt, taking the olefin-based vinyl silane as an example, they can undergo the following chemical reaction:

2. Taking Portland cement as an example, the mechanism of action of one end of olefin-based silane and concrete is as follows:

1 The hydration reaction of cement at normal temperature produces hydrated calcium silicate (CSH gel) and Ca(OH) ₂ , and there are Si-OH groups in the CSH gel. The reaction formula: 3CaO·SiO ₂ +nH2O=xCa·SiO ₂ · yH ₂ O+(3-x)Ca(OH) ₂ ;

2 The reactive groups in the adhesive layer are hydrolyzed by water:

3 Hydrolysis to form Si-OH groups and react with Si-OH groups in CSH gel to form ether bonds, so that the hydrated calcium silicate gel reacts with the surface of the coil to form a chemical bond (forming an ether bond with CSH) as follows:

The mechanism for reacting one end of the olefin-based silane with aluminate cement, sulphoaluminate cement or aluminosilicate cement is also the same.

The bridging agent of the present invention does not cause damage to the steel bars in the coupling compound of the hydroxyl group, the ether bond and the silica in the cement gel.

The positive effect produced by the invention: the waterproof bridging agent molecule of the invention contains a plurality of reactive functional groups, and when the waterproof bridging agent in the product contacts the base surface, the reactive groups in the molecule rapidly react with the base surface to form a chemical bond. Produces strong adhesion, while other functional groups in the molecule extend in the rubber-asphalt composite layer through steric hindrance and intermolecular forces. At the same time, the combination of asphalt and rubber keeps the asphalt sticky after curing. It also has the excellent elasticity and weather resistance of rubber. The coating is a water-based environmentally friendly coating with convenient construction and excellent social and economic benefits.

detailed description

The %s described in the following examples are all % by weight, and the parts are parts by weight.

Example 1

20 parts of styrene-butadiene rubber latex having a solid content of 42% was taken, and 20 parts of emulsified asphalt and 0.6 parts of N-phenyl-3-aminopropyltrimethoxysilane were added under stirring at room temperature, and the mixture was uniformly stirred to obtain a bridge-type waterproof coating.

Example 2

30 parts of neoprene latex with a solid content of 50% was taken, and 20 parts of neoprene-modified emulsified asphalt with a solid content of 50% and 1 part of vinyltrichlorosilane were added under normal temperature stirring to obtain a bridge-type waterproof coating.

Example 3

40 parts of SBS rubber latex with a solid content of 60%, 60 parts of emulsified asphalt with 60% solid content and 1 part of γ-chloropropyltriethoxysilane were added under normal temperature stirring, and evenly stirred to obtain bridge-type waterproof coating. .

Example 4

50 parts of polymethyl acrylate emulsion with a solid content of 55%, 50 parts of emulsified asphalt with a solid content of 55% and 2 parts of γ-methacryloxypropyltris(trimethylsiloxane) were added under normal temperature stirring. The silane is stirred evenly to obtain a bridge-type waterproof coating.

Example 5

45 parts of polybutyl acrylate with a solid content of 55%, 35 parts of emulsified asphalt with a solid content of 55% and 3 parts of β-(3,4 epoxycyclohexyl)ethylmethyl group with 50-60 ° C stirring. Diethoxysilane, 5 parts of SBS was stirred evenly to obtain a bridge-type waterproof coating.

Example 6

55 parts of polymethyl methacrylate emulsion with a solid content of 50%, 45 parts of emulsified asphalt with a solid content of 55%, 1 part of allyltrimethoxysilane and 3 parts of N-(4-amino group) were added under normal temperature stirring. Butyl) aminomethyltriethoxysilane, stirring Evenly, get a bridge-type waterproof coating.

Example 7

25 parts of natural rubber latex with a solid content of 50%, 33 parts of emulsified asphalt and 3 parts of tri-tert-butoxyvinylsilane; wherein the emulsified asphalt uses 1 ton of 100-pure petroleum pitch and 1 ton of 20 kg of octadecyl The soap of trimethylammonium chloride is emulsified by emulsified colloid mill. The coating production method is to mix and stir natural rubber latex, emulsified asphalt and tri-tert-butoxyvinylsilane at 50-60 ° C. Bridge-type waterproof coating.

Example 8

60 parts of styrene-butadiene rubber latex with a solid content of 50%, 30 parts of emulsified asphalt, and 5 parts of 3-(2,3 epoxypropoxy)propyltrimethoxy; wherein the emulsified asphalt uses 1 ton of 100-pure petroleum asphalt and 1 ton of soap containing 10 kg of octadecyltrimethylammonium chloride is emulsified by emulsified colloid mill. The coating production method is natural rubber latex, emulsified asphalt, 3-(2, at 50-60 °C. 3 epoxy propylene oxide) propyl trimethoxy mixture, stirring evenly, to obtain a bridge-type waterproof coating.

Example 9

30 parts of neoprene latex with a solid content of 50% was taken, and 20 parts of neoprene-modified emulsified asphalt with a solid content of 50% and 1 part of vinyltrichlorosilane were added under normal temperature stirring to obtain a bridge-type waterproof coating. The neoprene-modified emulsified asphalt having a solid content of 50% is 96 parts of No. 90 petroleum pitch added with 4 parts of chloroprene rubber, modified at a temperature of 180-220 ° C for 3 hours, and cooled to 160-170 ° C, and then It was prepared by emulsifying and mixing 100 parts of a soap solution containing 10 parts of cetyltributylammonium chloride at 70-80 ° C by an emulsified colloid mill.

Example 10

55 parts of polymethyl methacrylate emulsion with a solid content of 50%, 45 parts of emulsified asphalt with a solid content of 55% and 3 parts of tri-tert-butoxyvinylsilane were stirred at room temperature, and stirred uniformly to obtain a bridged type. Waterproof coating.

Example 11

20 parts of styrene-butadiene rubber latex with a solid content of 42%, 30 parts of styrene-butadiene rubber modified emulsified asphalt with a solid content of 50% and 0.2 parts of rare earth lauric acid compound were added under normal temperature stirring, and evenly stirred to obtain a bridge-type waterproof coating. .

Example 12

30 parts of neoprene latex with a solid content of 50%, 20 parts of chloroprene-modified emulsified asphalt with a solid content of 50% and 0.6 parts of aluminum zirconate waterproof bridge agent were added under normal temperature stirring, and the mixture was evenly stirred to obtain a bridge. Joint waterproof coating.

Example 13

40 parts of SBS rubber latex with a solid content of 60% was taken, 60 parts of emulsified asphalt with a solid content of 60% and 1 part of trioctyltin chloride were added under normal temperature stirring, and the mixture was uniformly stirred to obtain a bridge-type waterproof coating.

Example 14

50 parts of polymethyl acrylate emulsion with a solid content of 55%, and added emulsified asphalt with a solid content of 55% under normal temperature stirring 50 parts and 2 parts of tetra-n-butyl zirconate were stirred uniformly to obtain a bridge-type waterproof coating.

Example 15

45 parts of polybutyl acrylate having a solid content of 55% was taken, and 35 parts of emulsified asphalt having a solid content of 55% and 3 parts of di-n-butylethyl phosphate were added under stirring at room temperature, and the mixture was uniformly stirred to obtain a bridge-type waterproof coating.

Example 16

Take 55 parts of polymethyl methacrylate emulsion with 50% solid content, add 45 parts of emulsified asphalt with 55% solid content and 4 parts of lignin waterproof bridge agent under normal temperature stirring. Stir well and add 2 parts of attapulgite , evenly mixed, to obtain a bridge-type waterproof coating.

Example 17

55 parts of polymethyl methacrylate emulsion with a solid content of 50%, 45 parts of emulsified asphalt with a solid content of 55%, 1 part of dioctylethyl phosphate and 3 parts of lignin waterproof bridged agent under normal temperature stirring Stir well and obtain a bridge-type waterproof coating.

Comparative example

55 parts of polymethyl methacrylate emulsion with a solid content of 50% was taken, and 45 parts of emulsified asphalt with a solid content of 55% was added under normal temperature stirring. After stirring, 2 parts of attapulgite was added and uniformly mixed to obtain an ordinary waterproof coating.

Test: Take the waterproof coating obtained in the above example and apply it on the surface of cement concrete, so that the thickness of the waterproof layer after drying is 1-2 mm, according to the test method of JC/T 408-2005 "Water-based asphalt-based waterproof coating" The resulting waterproof layer was tested for major performance and the results are shown in Table 1 below:

Application example

A large-scale real estate in Nanning, Guangxi, in July 2012, due to the use of multi-pipe water, toilets, roof tops, all through the water PVC pipe, using the bridge-type waterproof coating of the invention for processing. The construction process is as follows: After testing with special instruments, the bond strength with cement concrete is >0.9MPa, the heat resistance is 80°C without slip, the tensile strength is >0.7MPa, and the performance is excellent. After three years of rainy season test, no Leakage and cracking phenomenon, while another building in the next-door community uses ordinary asphalt as a waterproof coating for treatment. There are cracks at several pipe joints on the floor, and it is seepage when it rains.

Claims

A bridge-type waterproof coating characterized by comprising the following parts by weight:

Rubber latex 20~60;

Emulsified asphalt 20~60;

Waterproof bridging agent 0.2~4.
The bridge type waterproof coating according to claim 1, wherein the rubber latex is any one of natural rubber latex, styrene butadiene rubber latex, neoprene latex, SBS rubber latex or polyacrylate. Or their compositions.
The bridge type waterproof coating according to claim 1, wherein the emulsified asphalt is an asphalt, an emulsifier, a coating auxiliary agent and water treated by an emulsifier to obtain an emulsion; and the emulsified asphalt is selected from a cationic emulsified asphalt. Anionic emulsified asphalt, non-ionic emulsified asphalt.
The bridge type waterproof coating according to claim 3, wherein the coating aid is an anti-aging agent, a leveling agent, a reinforcing agent, and a filler.
The bridge type waterproof coating according to claim 1, wherein the waterproof bridge agent is a silane type waterproof bridge agent, a bimetal waterproof bridge agent, a lignin waterproof bridge agent, and a tin waterproof bridge. Any one or a combination of a zirconium water-repellent bridging agent, a phosphate ester waterproofing bridging agent or a rare earth water-repellent bridging agent, wherein the water-repellent bridging agent has a C=C double bond and a carboxyl group at one end of the asphalt. The COOH and hydroxy-OH groups are combined, and the other end is combined with the hydroxyl or acid group produced by the hydration of the cement. The chemical cross-linking reaction with the concrete is carried out to build a waterproof bridge, which acts as an irreversible bonding after solidification. Asphalt and The rubber latex combines to maintain the asphalt adhesion after the coating is cured, and has the excellent elasticity and weather resistance of the rubber.
The bridge type waterproof coating according to claim 5, wherein the silane type waterproof crosslinking agent is an alkenylsiloxane, an aminosiloxane, a chloroalkylsiloxane, or a methacryloyloxy group. Any one of a siloxane or an epoxy siloxane or a combination thereof.
The bridge type waterproof coating according to claim 6, wherein said alkenylsiloxane is vinyltrichlorosilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyl Tris(β-methoxyethoxy)silane, vinyltriacetoxysilane, tri-tert-butoxyvinylsilane, vinyltri-tert-butylperoxysilane, allyltrimethoxysilane or allyl Triethoxysilane;

The aminosilicone is aniline methyltrimethoxysilane, aniline methyltriethoxysilane, N-(4-aminobutyl)aminomethyltriethoxysilane, γ-aminopropyltrimethoxy Silane, (3-aminopropyl)triethoxysilane, N-methyl-3-aminopropyltrimethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane, γ-(β -aminoethyl)aminopropyltrimethoxysilane, γ-(β-aminoethyl)aminopropylmethyldimethoxysilane, γ-diethylenetriaminopropyltrimethoxysilane, 3-aminobenzene Trimethoxysilane, 2-(4-N-benzylethylenediamine)ethyltrimethoxysilane or N,N-bis(2-hydroxyethyl)-3-aminopropyltriethoxysilane ;

The chloroalkylsiloxane is γ-chloropropyltrichlorosilane, γ-chloropropyltrimethoxysilane, γ-chloropropyltriethyl Oxysilane or 2-(4-chlorobenzyl)ethyltrimethoxysilane;

The methacryloxysiloxane is γ-methacryloxypropyltrichlorosilane, γ-methacryloxypropyltrimethoxysilane, γ-methacryloxypropyl three (β-methoxyethoxy)silane or γ-methacryloxypropyltris(trimethylsiloxy)silane;

The epoxy siloxane is 3-(2,3 epoxypropoxy)propyltrimethoxy, β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, β-(3) , 4-epoxycyclohexyl)ethyltriethoxysilane or β-(3,4-epoxycyclohexyl)ethylmethyldiethoxysilane.
The bridge type waterproof coating according to claim 5, wherein the bimetallic waterproof bridge agent is an aluminum zirconate waterproof bridge agent.
The bridge-type waterproof coating according to claim 5, wherein the lignin waterproofing bridge agent is a lignin-based macromolecular organic mixture produced by the paper industry.
The bridge type waterproof coating according to claim 5, wherein the tin waterproof bridge agent is tin tetrachloride, trioctyltin chloride or dioctyltin dichloride.
The bridge-type water repellent coating according to claim 5, wherein the zirconium water-repellent bridging agent is tetra-n-butyl zirconate, tetrapentyl zirconate or tetraoctyl zirconate.
The bridge type waterproof coating according to claim 5, wherein said phosphate waterproof bridge agent is di-n-butyl methyl phosphate, di-n-butyl ethyl phosphate, dioctyl methyl phosphate Or dioctylethyl phosphate.
The bridge type waterproof coating according to claim 5, wherein the rare earth waterproofing bridge agent is a rare earth lauric acid compound or a rare earth stearic acid compound.
The bridge type waterproof coating according to claim 1, wherein the production method comprises the following steps: stirring the emulsified asphalt and the water-repellent bridging agent at room temperature for 1 to 3 hours, and fully melt-mixing to obtain a mixture A; The emulsifier is restarted, the mixture A is mixed with the rubber latex aqueous solution, and simultaneously added to the emulsifier, the asphalt mixture is emulsified, and the mixture is uniformly stirred to obtain a bridge-type waterproof coating product.
The bridge type waterproof coating according to claim 1, which is used as a waterproof coating between a concrete base surface or a base joint, a water pipe edge and concrete.