KR101589046B1 - Setting agent for Emulsified polymer-asphalt waterproofing membrane material and manufacturing method for the same - Google Patents

Abstract

Disclosed is a curing agent for an aqueous rubberized asphalt coating material and a method of producing the curing agent. According to a preferred embodiment of the present invention, a composition comprising 21 to 41% by weight of methylene diphenyl diisocyanate, 18 to 35% by weight of a polyurethane prepolymer, 1 to 5% by weight of a surfactant, A curing agent for an aqueous rubberized asphalt coating material waterproofing material comprising from about 60% to about 60% by weight.
According to the present invention, the water-soluble film-coating waterproofing material can be cured within a short time after the water-soluble coating material waterproofing material is applied to a predetermined thickness, and can be immediately advanced to a subsequent step, and bubbles are not generated inside and on the surface of the waterproof layer, It is possible to form a predetermined coating film thickness by one time application without affecting the physical properties, and it is possible to shorten the construction time.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curing agent for an aqueous rubberized asphalt coating material,

The present invention relates to a curing agent for a water-soluble rubber-modified asphalt-based coating film and a method for preparing the same, and more particularly, to a curing agent for a water- To a curing agent for an aqueous rubberized asphalt coating material waterproofing material containing a carbon dioxide absorbent and a method for producing the same.

The coating film waterproofing material is a reactive type composition which forms a coating film by a drying type or a chemical reaction in which water or a liquid type waterproofing material is applied to the surface to evaporate water or solvent and waterproof effect is obtained by using the remaining film, Exterior waterproofing of civil engineering structures, waterproofing of retaining walls and underground structures of underground structures, and indoor waterproofing of toilets, bathrooms, and verandas.

The coating waterproofing material is an emulsion type which is mainly composed of rubberized asphalt, acrylic rubber or acrylic resin, and a reaction type which contains chloroprene or chlorosulfonated polyethylene and which is mainly composed of urethane or epoxy resin. Among these, urethane- Asphalt based coatings are widely used.

The rubberized asphalt-based coating film waterproofing material is prepared by mixing a styrene-based polymer, ethylene-vinyl acetate or styrene-butadiene latex or the like with asphalt to modify the asphalt so as to have properties that the asphalt can not have, that is, excellent elongation, crack resistance, cold resistance, It is.

In order to further enhance heat resistance, strength and hardness, a surfactant, a hardening accelerator, etc. may be added, and thermoplastic elastomers may be added.

On the other hand, the rubberized asphalt coating film waterproofing material can be classified into water-soluble and oil-based.

The oil-based rubberized asphalt-based coating film has a disadvantage that toluene used as a solvent may cause environmental problems, and when the water remains on the surface of the coating material, the adhesive strength is weakened. On the other hand, the water-soluble rubberized asphalt- The waterproofing material is environmentally friendly and has an advantage that it can be applied even when the moisture content on the surface of the coating material is large.

When the water-soluble rubberized asphalt-based coating film waterproofing material is applied, a waterproof coating layer is formed by applying a brush, a roller or a spray to the place where the waterproof rubberized asphalt-based coating film waterproofing material is to be applied. After drying naturally, a waterproof layer is formed.

Therefore, it takes about 24 hours to 7 days or more depending on the thickness, weather, and temperature until the moisture is completely dried and cured, thereby delaying the construction period due to delay in the subsequent process input.

Also, if the rain falls within 24 hours (curing time) after the construction, the waterproofing material dissolves in the water, which causes troubles of rework due to the breakage of the waterproof layer.

On the other hand, since it is hard to evaporate the water in cold regions, it is difficult to use the coating waterproofing material due to difficulty in curing. In order to maintain a constant thickness, it is necessary to repeat the coating twice or more Temperature, and climatic conditions.

Also, since water-soluble rubberized asphalt-based coating film waterproofing material is applied to form a predetermined thickness, water vapor generated upon curing by moisture drying forms bubbles and pinholes on the surface of the waterproof layer or on the surface of the waterproof layer, Resulting in deterioration in strength and elongation, and the like.

Accordingly, techniques for the curing agent of the water-based asphalt coating material waterproofing material to overcome the problems of the conventional aqueous asphalt coating material waterproofing material have been studied.

10 to 55 parts by weight of a polyoxyalkylene alkyl ester and 3 to 30 parts by weight of a polyoxyalkylene ether compound are added to 100 parts by weight of polyfunctional isocyanate, Based asphalt-based coating film-containing waterproofing material containing a modified isocyanate compound, which is produced by a conventional method, and a reactive curing type asphalt-based coating film waterproofing material containing the same.

Despite these prior arts, there is a problem that the dispersibility of the curing agent in the aqueous rubberized asphalt coating waterproofing material is poor and the minute bubbles are generated by the carbon dioxide generated by the reaction with the curing agent. In order to solve this problem, the aqueous rubberized asphalt coating waterproofing material The development of a curing agent for use is still required.

In order to solve the above-mentioned conventional problems, the present invention relates to a waterproof rubberized asphalt coating material waterproofing material, which is used in combination with the waterproofing material to shorten the curing time regardless of the thickness of the coating film and has excellent dispersibility in the waterproof asphalt coating waterproofing material. Which is capable of inhibiting the generation of internal microbubbles due to the generated carbon dioxide, and a process for producing the same.

Other objects of the present invention will become readily apparent from the following description of the embodiments.

According to one aspect of the present invention, there is provided a curing agent for an aqueous rubberized asphalt coating material for waterproofing.

According to a preferred embodiment of the present invention, there is provided a curing agent for an aqueous rubberized asphalt coating material waterproofing material, comprising: 21 to 41% by weight of methylene diphenyl diisocyanate (4,4'-diphenylmethane diisocyanate); 18% to 35% by weight of a polyurethane prepolymer; 1% to 5% by weight of a surfactant; And 40 wt% to 60 wt% of cement is provided as a curing agent for an aqueous rubberized asphalt coating film waterproofing material.

The methylene diphenyl diisocyanate may be an MDI prepolymer having an NCO content of 22.0 wt% to 29.0 wt% and a viscosity of 100 cPs to 1000 cPs at 25 ° C.

The polyurethane prepolymer may have an NCO content of 3.0 wt% to 15.0 wt% and a viscosity of 1000 cPs to 6000 cPs at 25 캜.

The surfactant is an ethylene oxide additive type among nonionic emulsifiers having excellent emulsification and dispersion permeability, and may have a HLB (Hydrophile-Lipophile Balance) value of 8.5 to 10.5.

According to another aspect of the present invention, there is provided a process for producing a curing agent for an aqueous rubberized asphalt coating material.

According to a preferred embodiment of the present invention, there is provided a method for producing a curing agent for waterproofing an asphalt coating film of waterproofing material, comprising the steps of: (a) preparing a cement admixture comprising a mixture of methylene diphenyl diisocyanate (4,4'-diphenylmethane diisocyanate) and a polyurethane prepolymer; Mixing and stirring the mixture; Adding a surfactant to the mixture of the methylenediphenyl diisocyanate and the polyurethane prepolymer and stirring the mixture; And mixing and stirring the mixture of the methylenediphenyl diisocyanate, the polyurethane prepolymer, and the surfactant with the cement, and stirring the mixed cement. The present invention also provides a method for producing a curing agent for an aqueous rubberized asphalt coating waterproofing material.

The methylene diphenyl diisocyanate is present in an amount of 21 to 41% by weight based on the total weight of the polyurethane prepolymer, 18 to 35% by weight of the total weight of the polyurethane prepolymer, 1 to 5% Cement can be added in the range of 40 wt% to 60 wt% of the total weight.

The methylene diphenyl diisocyanate may be an MDI prepolymer having an NCO content of 22.0 wt% to 29.0 wt% and a viscosity of 100 cPs to 1000 cPs at 25 ° C.

The polyurethane prepolymer may have an NCO content of 3.0 wt% to 15.0 wt% and a viscosity of 1000 cPs to 6000 cPs at 25 캜.

The surfactant is an ethylene oxide additive type among nonionic emulsifiers having excellent emulsification and dispersion permeability, and may have a HLB (Hydrophile-Lipophile Balance) value of 8.5 to 10.5.

INDUSTRIAL APPLICABILITY As described above, according to the curing agent for waterproof rubberized asphalt coating waterproofing material of the present invention and the method for producing the waterproofing coating material waterproofing agent according to the present invention, it is advantageous that the water soluble coating film waterproofing agent is cured within a short time after the waterproof coating waterproofing agent is applied to a predetermined thickness, have.

Since bubbles are not generated in the inside and the surface of the waterproof layer, it is possible to form a predetermined coating film thickness with a single application without affecting physical properties such as tightness, strength and elongation of the coating layer, There are advantages.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a procedure for manufacturing a curing agent for a water-rubber-modified asphalt coating material according to a preferred embodiment of the present invention. FIG.
2 is a flowchart showing a procedure of performing a combined waterproofing method using an asphalt coating material waterproofing material to which a curing agent for waterproofing rubberized asphalt coating waterproofing material according to a preferred embodiment of the present invention is applied.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention.

The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and a duplicate description thereof will be omitted.

First, the curing agent for a water-soluble, rubberized asphalt-based coating material waterproofing material according to the present invention comprises 21 to 41% by weight of methylene diphenyl diisocyanate (4,4'-diphenylmethane diisocyanate) and 18% by weight of a polyurethane prepolymer % To 35% by weight of a surfactant, 1% to 5% by weight of a surfactant and 40% to 60% by weight of a cement.

Among the components constituting the curing agent for the water-soluble rubberized asphalt-based coating film waterproofing material of the present invention, methylene diphenyl diisocyanate (4,4'-diphenylmethane diisocyanate) has an NCO content of 22.0 wt% to 29.0 wt% Is an MDI prepolymer series having a viscosity of 100 cPs to 1000 cPs at 25 占 폚.

If the NCO content of methylene diphenyl diisocyanate (Methylene diphenyl diisocyanate) is less than 22.0% by weight, the amount added to the water-soluble rubberized asphalt-based waterproof material increases. If the NCO content exceeds 29.0% by weight, So that it is difficult to secure the working time.

If the viscosity is less than 100 cPs, the viscosity of the curing agent becomes too low to cause storage stability such as precipitation of the cement. If the viscosity exceeds 1000 cPs, the viscosity of the curing agent becomes too high and the water-

Methylene diphenyl diisocyanate (4,4'-diphenylmethane diisocyanate) among the components constituting the curing agent for the water-soluble rubberized asphalt-based coating waterproofing agent reacts with the water contained in the water-soluble rubberized asphalt-based coating film- Urea and carbon dioxide. The urea generated in this case acts as a filler in the waterproof rubberized asphalt-based waterproofing layer in the form of small particles.

When the content of methylene diphenyl diisocyanate (4,4'-diphenylmethane diisocyanate) is less than 21% by weight in each component constituting the curing agent for the water-soluble rubberized asphalt-based coating film waterproofing agent, the viscosity of the entire curing agent increases, The mixing property with the waterproofing material is deteriorated. When it exceeds 41% by weight, it becomes difficult to control the curing time.

As the polyurethane prepolymer, the NCO content of the polyurethane prepolymer is preferably 3 wt% to 15 wt% and the viscosity is preferably 1000 cPs to 6000 cPs at 25 ° C, among the components constituting the curing agent for the water-soluble rubberized asphalt-based coating film waterproofing material.

The polyurethane prepolymer is prepared by reacting a polyol with toluene diisocyanate. The polyurethane prepolymer has an isocyanate group at both ends. In the curing agent, methylene diphenyl diisocyanate (4,4'-diphenylmethane diisocyanate ) And curing by reacting with water. Polyurethane prepolymer plays a role of accelerating curing by shortening reaction time after mixing curing agent and water-soluble rubberized asphalt-based coating film waterproofing material.

Also, the polyurethane prepolymer reacts with the water of the water-soluble rubberized asphalt-based coating material to form a polymeric urethane, which is dispersed in the coating material to improve the performance of the waterproofing material by acting as a polymer modifier.

If the content of the polyurethane prepolymer is less than 18% by weight among the respective constituents constituting the water-soluble rubberized asphalt-based coating film waterproofing agent, the curing acceleration effect becomes insufficient and the curing time becomes longer, and when the content of the polyurethane prepolymer is less than 35% The curing time becomes too short and the workability is lowered.

 Among the components constituting the curing agent for the water-soluble rubberized asphalt-based coating film waterproofing agent, the surfactant is preferably an ethylene oxide additive type among the nonionic emulsifiers excellent in emulsion dispersion and permeability and preferably has a Hydrophile-Lipophile Balance (HLB) value of 8.5 to 10.5.

When the content of the surfactant is less than 1% by weight, the dispersibility of the curing agent is lowered, and if the content of the surfactant exceeds 5% by weight, the curing agent for the water-soluble rubberized asphalt- The dispersibility is good, but the amount of the emulsifier is more than necessary, which may weaken the physical properties of the coating film waterproofing material.

Among the components constituting the curing agent for the water-soluble rubberized asphalt-based coating film waterproofing material, usually portland cement is preferable as the cement.

If the content of cement is less than 40% by weight among the components constituting the curing agent for the water-soluble rubberized asphalt-based coating film waterproofing material, the polyfunctional isocyanate group in the curing agent reacts with water and the generated carbon dioxide can not be absorbed sufficiently, Bubbles are formed to cause deterioration of the physical properties of the coating film. If the content exceeds 60% by weight, the cement reacts with water to hydrate, thereby excessively shortening the curing time and increasing the hardness of the cured coating film waterproofing material and reducing the elongation A decrease in the physical properties of the coating film may occur.

Hereinafter, a method for producing a curing agent for a water-borne asphalt coating material according to the present invention will be described with reference to FIG.

As shown in FIG. 1, a method for preparing a curing agent for an aqueous rubberized asphalt coating material according to a preferred embodiment of the present invention comprises first preparing a mixture of methylene diphenyl diisocyanate (4,4'-diphenylmethane diisocyanate) and a polyurethane prepolymer (S100). Then, a surfactant is added and stirred (S102), and then cement is added thereto and stirred (S104).

The present invention will be described in more detail by way of the following examples, but the present invention is not limited thereto.

1. Preparation of hardener

Methylene diphenyl diisocyanate (Methylene diphenyl diisocyanate) having a viscosity of 150 cPs, an MDI prepolymer having an NCO content of 28% by weight and a viscosity of 5,000 cPs, an NCO content of 5.0% by weight, 24.0% by weight of a polyurethane prepolymer was added and mixed at a speed of 500 rpm for 5 minutes with a general stirrer. 2.5% by weight of a nonionic surfactant of Polyoxyethylene Alkyl Aryl Ether series having an HLB value of 10.0 was added thereto After sufficient stirring for about 5 minutes, 50% by weight of ordinary portland cement was further added and sufficiently stirred to prepare a curing agent for a water-soluble asphalt-based coating film waterproofing material.

2. Curing of Water-Soluble Rubberized Asphalt-Based Coating Waterproofing Materials

3 parts by weight of the curing agent for a water-soluble rubberized asphalt-based coating film waterproofing agent was mixed with 100 parts by weight of a conventional water-soluble rubberized asphalt-based coating film waterproofing material (Highland Coat of Aruma) to prepare a water-soluble reactive curing type asphalt coating film- .

1. Preparation of hardener

Methylene diphenyl diisocyanate (Methylene diphenyl diisocyanate) having a viscosity of 650 cPs and a viscosity of 5,500 cPs in 26.0% by weight of an MDI prepolymer having an NCO content of 23% by weight and an NCO content of 8% by weight, 19% by weight of a polyurethane prepolymer was added and mixed for 5 minutes at a speed of 500 rpm with a general stirrer. Then, 3% by weight of a nonionic surfactant of Polyoxyethylene Alkyl Aryl Ether series having an HLB value of 8.9 was added thereto After sufficient stirring for about 5 minutes, 52% by weight of ordinary portland cement was further added and sufficiently stirred to prepare a curing agent for a water-soluble asphalt-based coating film waterproofing material.

2. Curing of Water-Soluble Rubberized Asphalt-Based Coating Waterproofing Materials

4 parts by weight of the curing agent for water-soluble, rubberized asphalt-based coating material waterproofing agent was mixed with 100 parts by weight of a conventional water-soluble rubberized asphalt-based coating film waterproofing material (Highland Coat of Aruma) to prepare a water-soluble reactive curing type asphalt- .

Meanwhile, the waterproof asphalt coating waterproofing material to which the curing agent for the waterproof asphalt coating waterproofing material according to the present invention is applied can be mixed with other waterproofing materials and the waterproofing can be carried out.

For example, at least one of a waterproof sheet and a urethane coating waterproofing material is applied together to propose a dual waterproofing method or a three or more waterproofing method.

In this case, for example, as shown in FIG. 2, when the waterproof sheet and the urethane paint film waterproofing material are all applied to perform the triple composite waterproofing work, a primer or the like is applied to the waterproof base surface, (S206), a waterproofing sheet is applied on the waterproofing sheet (S204), a waterproofing material for a waterproof asphalt coating material is applied (S206) The construction sequence to complete the waterproof layer construction can be performed.

In addition, asphalt primer was applied to the concrete, asphalt urethane was applied on the asphalt urethane, and a waterproof sheet having a double-sided nonwoven fabric was applied thereon. After 12 hours, an aqueous asphalt waterproofing material using the curing agent for the waterproof asphalt coating waterproofing material of Example 1 was applied After about 12 hours, it is also possible to put a press mortar on the entire waterproof layer to perform a combined waterproofing work.

On the other hand, the reason why the waterproof asphalt coating waterproofing material applying the curing agent for the asphalt coating waterproofing material according to the present invention is applied to the upper part of the waterproofing sheet is that the portion where the waterproofing sheet is most defective at the time of construction is the joint part of the waterproof sheet, As a result, it is possible to completely block the penetration of water into the composite waterproof layer by installing a seamless waterproof layer on the waterproof sheet once again with the water-based asphalt coating waterproofing material.

Hereinafter, the performance of the composite waterproofing layer using the water-based asphalt coating waterproofing material to which the curing agent for the asphalt coating waterproofing material according to the present invention is applied will be described with reference to the following test examples.

First, [Test Example 1] below is a test result of a case in which a waterproof sheet and a urethane coating waterproofing material are applied to a composite waterproofing layer to perform a triple composite waterproofing.

[Test Example 1]

A water-soluble rubberized asphalt based coating material waterproofing material mixed with the curing agent prepared in Examples 1 and 2 was applied to a glass mold for forming a test piece of 500 mm in width, 500 mm in height and 10 mm in height, to a thickness of 3 mm, The curing time, the state of the surface of the coating film waterproof layer, and the occurrence of bubbles in the coating film were measured at a temperature of 60 ° C, and are shown in Table 1 below.

The curing time was measured in parallel with the drying time and the curing time of the surface and inside of the coating film and the state of the surface was visually observed as to whether pinholes were generated or not. The cross section was visually observed.

On the other hand, a water-soluble rubberized asphalt-based coating film waterproofing material to which the curing agent prepared in the above Example was applied was applied to a glass mold for forming a test specimen having a size of 500 mm, 500 mm and a height of 10 mm in a thickness of 3 mm and cured for 120 hours at a temperature of 20 캜 The tensile strength, elongation, and tear strength were measured by the test method specified in Korean Industrial Standards (KS F-3211) with the test pieces cured at 20 ° C for 96 hours. The curing time, the condition of the surface of the coating film, the occurrence of bubbles in the coating film, the strength of the coating film, the stretchability and the restoring force were measured, and the results are shown in Table 1 below.

Curing time (minutes) State of coating surface Bubbles inside the coating film Seal
burglar
(kgf / cm2) Elongation
(%) Tear
burglar
(kgf / cm) 5 ℃ 20 ℃ 40 ℃ 60 ° C Example 1 73 58 49 43 No pinhole  none 5.3 More than 1,800 4.9 Example 2 75 59 48 44 No pinhole none 5.8 More than 1,800 5.2

The most important element of the waterproof function is the rapid realization of the waterproof function through rapid curing or drying after construction.

However, when the conventional water-soluble rubber-modified asphalt-based coating film waterproofing material is used alone, the curing time takes about 24 hours to 7 days depending on the thickness of the coating film, and bubbles or pinholes are formed on the inside or the surface of the coating film even after curing. However, as can be seen from the above Table 1, the waterborne rubberized asphalt coating material waterproofing material using the curing agent of the present invention has a curing rate of 90% or more even though the primary curing time is within 1 hour, A pinhole is not generated, and a coating film having improved tensile strength, elongation, and the like is obtained with a dense structure after complete drying.

In addition, after the waterproofing of the coating film, the waterproofing material using the curing agent for the water-based asphalt coating material of the present invention can perform the subsequent processing after about 1 to 4 hours, Is remarkably shortened.

First, in the below-described [Test Example 2], asphalt primer was applied to the concrete, the asphalt urethane was applied on the concrete, and a waterproof sheet having a double-sided nonwoven fabric was applied thereon. It is the result of the test when the waterproof asphalt waterproofing material using the curing agent for the asphalt coating waterproofing material is applied and the press waterproofing material is laid on the entire waterproofing layer for about 12 hours.

[Test Example 2]

The composite waterproofing model described above was left at room temperature for about 7 days, and after three days of fresh water test, one layer was removed from the protective mortar layer to confirm the adhesion and curing (drying) of the waterproof layer.

On the other hand, the conventional composite waterproofing method is compared with the test results as in the above-described test examples.

[Comparative Example 1] First, asphalt primer was applied to concrete, asphalt urethane was applied on the asphalt, and a waterproof sheet having a double-sided nonwoven fabric was applied thereon. After 12 hours, general waterproof asphalt coating waterproofing material was applied, and after about 12 hours, And pressurized mortar was installed to complete the combined waterproofing construction.

However, in the composite waterproofing method, when the press mortar is applied, the waterproof asphalt coating waterproofing material applied to the lower layer is not cured and is pushed to the edge of the specimen by the weight of the mortar.

Then, as in the test example, after standing for 3 days at room temperature for about 7 days, the adhesion and curing (drying) state of the waterproof layer were confirmed while removing one layer from the protective mortar layer.

In Comparative Example 2, the asphalt primer was applied to the concrete, the urethane urethane was applied on the concrete, the double-sided nonwoven finished waterproof sheet was applied thereto, and after 12 hours, the general waterproof asphalt coating waterproofing material was applied, and after about 7 days, Mortar was installed to complete the combined waterproofing work.

Then, as in the test example, after standing for 3 days at room temperature for about 7 days, the adhesion and curing (drying) state of the waterproof layer were confirmed while removing one layer from the protective mortar layer.

From the above test results and comparison results, it can be seen that the composite waterproofing method using the water-based asphalt coating material waterproofing material to which the curing agent for the aqueous rubberized asphalt-based coating material of the present invention is applied has more excellent physical properties and the construction time is significantly shortened.

It will be apparent to those skilled in the relevant art that various modifications, additions and substitutions are possible, without departing from the spirit and scope of the invention as defined by the appended claims. The appended claims are to be considered as falling within the scope of the following claims.

Claims (9)

1. A curing agent for an aqueous rubberized asphalt coating film waterproofing material,
21% to 41% by weight of methylene diphenyl diisocyanate (4,4'-diphenylmethane diisocyanate);
18% to 35% by weight of a polyurethane prepolymer;
1% to 5% by weight of a surfactant; And
A curing agent for an aqueous rubberized asphalt coating material waterproofing material comprising 40% by weight to 60% by weight of cement.
The method according to claim 1,
Wherein the methylene diphenyl diisocyanate is an MDI prepolymer having an NCO content of 22.0 wt% to 29.0 wt% and a viscosity of 100 cPs to 1000 cPs at 25 ° C. Curing agent for asphalt coating waterproofing material.
The method according to claim 1,
Wherein the polyurethane prepolymer has an NCO content of 3.0 wt% to 15.0 wt% and a viscosity of 1000 cPs to 6000 cPs at 25 DEG C, and a curing agent for an aqueous rubberized asphalt coating waterproofing material.
The method according to claim 1,
Wherein the surfactant is an ethylene oxide additive type among nonionic emulsifiers having excellent emulsification and dispersion permeability and has a HLB (Hydrophile-Lipophile Balance) value of 8.5 to 10.5.
A method for producing a curing agent for an aqueous rubberized asphalt coating waterproofing material,
Mixing and stirring a mixture of methylene diphenyl diisocyanate (4,4'-diphenylmethane diisocyanate) and a polyurethane prepolymer;
Adding a surfactant to the mixture of the methylenediphenyl diisocyanate and the polyurethane prepolymer and stirring the mixture; And
And adding the cement to the mixture of the methylenediphenyl diisocyanate, the polyurethane prepolymer, and the surfactant, and stirring the mixed solution. The method for producing a curing agent for an aqueous rubberized asphalt coating film waterproofing material according to claim 1,
6. The method of claim 5,
The methylene diphenyl diisocyanate is present in an amount of 21 to 41% by weight based on the total weight of the polyurethane prepolymer, 18 to 35% by weight of the total weight of the polyurethane prepolymer, 1 to 5% Wherein the cement is added in a range of 40 wt% to 60 wt% of the total weight of the cement.
6. The method of claim 5,
Wherein the methylene diphenyl diisocyanate is an MDI prepolymer having an NCO content of 22.0 wt% to 29.0 wt% and a viscosity of 100 cPs to 1000 cPs at 25 ° C. A method for producing a curing agent for an asphalt coating film waterproofing material.
6. The method of claim 5,
Wherein the polyurethane prepolymer has an NCO content of 3.0 wt% to 15.0 wt% and a viscosity at 25 DEG C of 1000 cPs to 6000 cPs.
6. The method of claim 5,
Wherein the surfactant is an ethylene oxide additive type among nonionic emulsifiers having excellent emulsification and dispersion permeability and has a Hydrophile-Lipophile Balance (HLB) value of 8.5 to 10.5. The method for producing a curing agent for an aqueous rubberized asphalt coating waterproofing material according to claim 1,

Images