KR102300813B1 - Polyurethane waterproof agent manufacturing method and complex waterproof method using thereof - Google Patents

Abstract

The present invention provides a method of manufacturing a water-expandable polyurethane paint film waterproofing material, including: preparing a solution A by mixing 100 parts by weight of phenyl isocyanate with 70 to 90 parts by weight of 3-chlorophenyl isocyanate, 60 to 80 parts by weight of methyl isocyanate, 50 to 70 parts by weight of carboxyl acid, 40 to 60 parts by weight of pyridine, and 30 to 50 parts by weight of methyl iodide; preparing a solution B by mixing 100 parts by weight of 1-decanol with 60 to 80 parts by weight of 2-methoxy-2-methyl-3-butanol, 50 to 70 parts by weight of formaldehyde, 40 to 60 parts by weight of benzophenone, 30 to 50 parts by weight of sulfonic acid, and 20 to 40 parts by weight of phenyl magnesium bromide; and mixing the solution A with the solution B in a volume ratio of 3:1. Accordingly, a function of preventing water leakage is provided.

Description

Water-expandable polyurethane coating waterproofing material manufacturing method and laminated exposed and non-exposed composite waterproofing construction method using the same {Polyurethane waterproof agent manufacturing method and complex waterproof method using thereof}

The present invention relates to a method for manufacturing a polyurethane coating waterproofing material and a composite waterproofing construction method using the same, and more particularly, to manufacturing a polyurethane coating waterproofing material with excellent water expansibility and applying it to a laminated composite waterproofing construction method. It relates to a method for manufacturing a water-expandable polyurethane coating waterproofing material capable of absorbing water and providing a function of preventing water leakage by interfering with the flow of water, and a laminated exposed and non-exposed composite waterproofing construction method using the same.

In general, waterproof construction is performed on the roof, floor, underground parking lot, etc. of a building to prevent moisture from penetrating into the building. There are a coating waterproofing method, a sheet waterproofing method, and a composite waterproofing method as a waterproofing method for performing such a waterproofing construction, but recently, a composite waterproofing method combining a coating and a sheet waterproofing has been widely applied.

The waterproof sheet used in the composite waterproofing method is usually manufactured so that a waterproofing layer and a nonwoven layer formed of a waterproofing material are treated with a nonwoven fabric, but it is also manufactured by compounding various materials to provide various functions. As a waterproof sheet with a composite function, there is an insulating waterproof sheet in which a normal insulating material such as styrofoam is integrated with a waterproof layer, but this insulating waterproof sheet has a disadvantage in that the thickness is thick because the normal insulating material is applied as it is.

Accordingly, in order to solve the above problems, in Patent Registration No. 10-0983618, etc., an aluminum film waterproof sheet has been disclosed as a new insulating waterproof sheet with a thin thickness.

Here, in the conventional waterproof sheet, the lower surface layer is composed of a heat reflective film made of aluminum, the middle layer is composed of a waterproof layer including PE foam, the upper surface layer is composed of a non-woven fabric, and the lower layer of the upper surface layer by the non-woven fabric is a non-woven fabric. As a heat-sealed film layer, the film layer is provided with any one of aluminum, polypropylene, polyester, and polyvinyl chloride, and the nonwoven fabric and the film layer each extend in the same direction in the same direction than the waterproof layer of the intermediate layer. On the other hand, the wing adhesive layer and the release paper are provided under the wing portion of the film layer.

However, the conventional waterproof sheet as described above has a structure in which the wing portion for bonding the joint portions between adjacent waterproof sheets has a predetermined area while the remaining portion is extended while a portion is simply joined to the upper end of one side of the nonwoven fabric. have.

Therefore, when bonding joints between adjacent waterproof sheets, the remaining part of the wing part, which is partly bonded to the upper end of one side of one nonwoven fabric, is covered while having a predetermined area on the upper end of the other side of the other nonwoven fabric. It has a structure that is connected to

Therefore, in the case where the joint of adjacent waterproof sheets is joined with the structure as described above, the durability of the joint state is greatly reduced because the wing part is easily lifted or folded even when the wind blows or a small impact, so that the waterproof function of the corresponding part is weak. There is a problem with cancellation.

On the other hand, in order to solve the above problems, recently, a waterproofing method in which a sealant of a polyurethane material is applied to a joint portion of a waterproofing sheet has been proposed. Here, the polyurethane material is for civil engineering and construction, and it is possible to construct seamlessly, which is a characteristic of the material itself, and to adapt well to complex-shaped structures, as well as chemical properties such as adhesion to the substrate, chemical resistance, and durability. It has excellent physical properties such as characteristics, sound absorption, and dimensional stability. In particular, due to the great advantage of excellent elongation, it is widely used as a coating waterproofing material in the laminated composite waterproofing construction method because of its excellent followability to cracks in the base.

However, the conventional polyurethane coating film waterproofing material has a problem in that it frequently leads to defects due to aging when in contact with moisture in the long term.

Therefore, an object of the present invention is a solution A in which 3-chlorophenyl isocyanate, methyl isocyanate, carboxylate, pyridine and methyl iodide are mixed in phenyl isocyanate and 2-methoxy-2- in 1-decanol Methyl-3-butanol, formaldehyde, benzophenone, sulfonic acid and phenylmagnesium bromide were mixed with solution B to prepare a water-expandable polyurethane coating waterproofing material and applied to the laminated composite waterproofing construction method to apply the water-expandable poly To provide a method for manufacturing a water-expandable polyurethane coating waterproofing material capable of providing a function of preventing water leakage by absorbing water and interfering with the flow of water, and a laminated exposed and non-exposed composite waterproofing construction method using the same.

On the other hand, the object of the present invention is not limited to the object mentioned above, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

For this, according to the present invention, 70 to 90 parts by weight of 3-chlorophenyl isocyanate, 60 to 80 parts by weight of methyl isocyanate, 50 to 70 parts by weight of carboxyl acid, 40 to 60 parts by weight of pyridine, according to the present invention, 100 parts by weight of phenyl isocyanate. A step of preparing a solution A by mixing 30-50 parts by weight of methyl iodide and parts by weight; To 100 parts by weight of 1-decanol, 60 to 80 parts by weight of 2-methoxy-2-methyl-3-butanol, 50 to 70 parts by weight of formaldehyde, 40 to 60 parts by weight of benzophenone, 30 to 50 parts by weight of sulfonic acid and 20-40 parts by weight of phenylmagnesium bromide are mixed to prepare solution B; There is provided a method for producing a water-expandable polyurethane coating waterproofing material comprising the step of mixing the liquid A and the liquid B in a volume ratio of 3:1.

In addition, according to the present invention, the concrete surface is cleaned and treated, comprising the steps of arranging the base surface; applying a primer to the base surface; applying the water-expandable polyurethane coating waterproofing material to the primer layer; Before the water-expandable polyurethane coating waterproofing material is cured, a high-elasticity composite sheet is attached to the high-elasticity composite sheet layer is installed; forming a semi-rigid urethane coating layer by applying a semi-rigid urethane coating film to the upper surface of the highly elastic synthetic sheet layer after the water-expandable polyurethane coating waterproofing material is cured; There is provided a laminated exposure composite waterproofing construction method using a water-expandable polyurethane coating waterproofing material comprising the step of applying a top coat layer after the semi-rigid urethane coating material is cured.

In addition, according to the present invention, the step of cleaning and processing the concrete surface to arrange the base surface; applying a primer to the base surface; applying the water-expandable polyurethane coating waterproofing material to the primer layer; Before the water-expandable polyurethane coating waterproofing material is cured, a high-elasticity synthetic sheet is attached to the high-elasticity synthetic sheet layer is installed; After the water-expandable polyurethane coating film waterproofing material is cured, a flexible urethane coating film is applied to the upper surface of the highly elastic synthetic sheet layer to form a flexible urethane coating film; Before the flexible urethane coating material is cured, a high-density hard sheet is attached to the high-density hard sheet layer is installed; There is provided a laminated non-exposed composite waterproofing construction method using a water-expandable polyurethane coating waterproofing material comprising the step of pouring a pressed concrete layer to a predetermined thickness on the upper surface of the high-density rigid sheet layer.

Therefore, according to the present invention, 3-chlorophenyl isocyanate, methyl isocyanate, carboxylate, pyridine and methyl iodide are mixed with phenyl isocyanate in solution A and 1-decanol with 2-methoxy-2- Methyl-3-butanol, formaldehyde, benzophenone, sulfonic acid and phenylmagnesium bromide were mixed with solution B to prepare a water-expandable polyurethane coating waterproofing material and applied to the laminated composite waterproofing construction method to apply the water-expandable poly The urethane coating waterproofing material can provide a function of absorbing water and preventing water leakage by obstructing the flow of water.

On the other hand, the effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a view showing an example of a laminated exposed composite waterproofing construction method using a water-expandable polyurethane coating waterproofing material according to a preferred embodiment of the present invention;
2 is a view showing an example of a laminated non-exposed composite waterproofing construction method using a water-expandable polyurethane coating waterproofing material according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail.

A water-expandable polyurethane coating waterproofing material according to a preferred embodiment of the present invention includes a solution A in which 3-chlorophenyl isocyanate, methyl isocyanate, carboxylate, pyridine and methyl iodide are mixed with phenyl isocyanate, 1 -Contains solution B in which decanol is mixed with 2-methoxy-2-methyl-3-butanol, formaldehyde, benzophenone, sulfonic acid and phenylmagnesium bromide, and the solution A and solution B are in a predetermined volume ratio mixed with

Specifically, the water-expandable polyurethane coating waterproofing material of the present invention is 70 to 90 parts by weight of 3-chlorophenyl isocyanate, 60 to 80 parts by weight of methyl isocyanate, 50 to 70 parts by weight of carboxyl acid to 100 parts by weight of phenyl isocyanate. , 40-60 parts by weight of pyridine and 30-50 parts by weight of methyl iodide A solution mixed with 100 parts by weight of 1-decanol 60-80 parts by weight of 2-methoxy-2-methyl-3-butanol, 50 to 70 parts by weight of formaldehyde, 40 to 60 parts by weight of benzophenone, 30 to 50 parts by weight of sulfonic acid, and 20 to 40 parts by weight of phenylmagnesium bromide are included in Solution B, wherein Solution A and Solution B are 3: mixed in a volume ratio of 1.

On the other hand, the manufacturing method of the water-expandable polyurethane coating waterproofing material according to a preferred embodiment of the present invention is 70 to 90 parts by weight of 3-chlorophenyl isocyanate, 60 to 80 parts by weight of methyl isocyanate to 100 parts by weight of phenyl isocyanate. , 50 to 70 parts by weight of carboxyl acid, 40 to 60 parts by weight of pyridine and 30 to 50 parts by weight of methyl iodide are mixed to prepare a solution A, and 1-decanol 100 parts by weight of 2-methoxy-2- Methyl-3-butanol 60 to 80 parts by weight, formaldehyde 50 to 70 parts by weight, benzophenone 40 to 60 parts by weight, sulfonic acid 30 to 50 parts by weight, and phenylmagnesium bromide 20 to 40 parts by weight are mixed to obtain solution B. It includes the step of being prepared, and the step of mixing the liquid A and the liquid B in a volume ratio of 3:1.

That is, according to the present invention, solution A in which 3-chlorophenyl isocyanate, methyl isocyanate, carboxyl acid, pyridine and methyl iodide are mixed and reacted with phenyl isocyanate is 2-methyl in 1-decanol. Toxy-2-methyl-3-butanol, formaldehyde, benzophenone, sulfonic acid and phenylmagnesium bromide are mixed to form a urethane bond with improved water expandability when mixed with the reacted solution B.

Accordingly, the solution A is, 100 parts by weight of phenyl isocyanate, 70 to 90 parts by weight of 3-chlorophenyl isocyanate, 60 to 80 parts by weight of methyl isocyanate, 50 to 70 parts by weight of carboxyl acid, 40 to 60 parts by weight of pyridine It is preferably prepared through mixing and reacting parts and 30-50 parts by weight of methyl iodide.

Phenylisocyanat, which provides adsorption and adhesion functions, speeds up the reaction rate of the compositions, converts the compositions into urethane within a short time, and provides a function of terminating the reaction.

Here, 100 parts by weight of phenyl isocyanate is mixed with respect to the compositions, but when it exceeds 100 parts by weight, the reaction rate of the compositions becomes too fast and the viscosity becomes too large, so that the stirrability and workability are reduced, , when it is less than 100 parts by weight, the reaction rate of the compositions becomes too slow, the working time is increased, and the storage stability of the mixture is also poor, so there is a problem that the adhesive strength of the coating film is lowered. it's good

3-Chlorophenyl isocyanate is a material that provides a function of smoothly spraying or applying the mixed solution of the A and B solution by a spraying device or an applicator when waterproofing the coating film, and 100 parts by weight of the phenyl isocyanate As a guide, when it exceeds 90 parts by weight, the adhesive strength is lowered and the adhesive force is lowered, and when it is less than 70 parts by weight, the adhesive strength is increased and spraying or coating workability is lowered. good.

Methyl isocyanate is a diluent for reacting with the mixtures to provide a predetermined viscosity. Based on 100 parts by weight of the phenyl isocyanate, when it exceeds 80 parts by weight, the overall viscosity of the solution A is too small. The workability is greatly reduced, and if it is less than 60 parts by weight, the overall viscosity of the solution A becomes too large and the stirring efficiency with the solution B is lowered, so it is better to have the limited parts by weight as described above

Carboxylic acid is a material that reacts with the mixtures to provide adsorption and adhesion functions, terminates the reaction of the compositions, and improves crack resistance, based on 100 parts by weight of the phenyl isocyanate, more than 70 parts by weight In this case, the reaction rate of the compositions becomes too fast, and the stirrability and workability are reduced, and when it is less than 50 parts by weight, the reaction rate of the compositions becomes too slow and the working time increases. .

Pyridine is a material that improves durability by providing physical properties such as water expandability, toughness, flame resistance, and chemical resistance. It is lowered and the coating layer is easily damaged upon external impact, and when it is less than 40 parts by weight, the strength and rigidity function is lowered and durability is also reduced, so it is preferable to have the limited parts by weight as described above.

Methyl iodide is a substance that reacts with the above mixtures to provide adhesion with the surface of concrete or construction layer. Since the workability is deteriorated, and if it is less than 30 parts by weight, it is easily peeled off from the surface of the concrete or construction layer, it is preferable to have the limited parts by weight as described above.

Accordingly, the solution A is, through the phenyl isocyanate, 3-chlorophenyl isocyanate, methyl isocyanate, carboxyl acid, pyridine and methyl iodide having a limited weight part as described above, the water expandability of the improved waterproofing membrane , coating degree and stability are preferably provided.

Therefore, in the case of the liquid A of the present invention, when the weight part of the composition is less than the above range with respect to the weight part of the composition of the liquid B to be added, the overall adhesive strength and water expansibility of the coating film waterproofing material is lowered, and the In the case of having a weight part exceeding the same range, since the viscosity of the coating film waterproofing material becomes too large and the workability is deteriorated, it is preferable to have the weight part as described above.

On the other hand, solution B, in which 2-methoxy-2-methyl-3-butanol, formaldehyde, benzophenone, sulfonic acid and phenylmagnesium bromide are mixed with 1-decanol, is mixed with solution A as described above. It is a resin composition that not only has improved impact resistance by reacting with them, but also has excellent physical properties such as water expandability, heat resistance, moisture resistance, mechanical properties and processability.

Accordingly, the liquid B is, in 100 parts by weight of 1-decanol, 60 to 80 parts by weight of 2-methoxy-2-methyl-3-butanol, 50 to 70 parts by weight of formaldehyde, 40 to 60 parts by weight of benzophenone, It is preferable that 30-50 parts by weight of sulfonic acid and 20-40 parts by weight of phenylmagnesium bromide are mixed.

1-Decanol is a hydrophilic material that enables water expansion of the coating film waterproofing material through the function of absorbing water, and provides a function of improving the water expandability of the coating film waterproofing layer.

Here, 1-decanol is mixed with 100 parts by weight with respect to the above compositions. When it exceeds 100 parts by weight, the water expansibility of the waterproofing layer becomes too large to decrease durability, and when it is less than 100 parts by weight, the coating film Since there is a problem in that the crack resistance of the waterproof layer is lowered, it is preferable to have a limited weight part as described above.

2-Methoxy-2-methyl-3-butanol is a material providing a function of controlling the pot life (curing for spraying) time, and when it exceeds 80 parts by weight based on 100 parts by weight of 1-decanol Since the curing time is too fast, spraying and coating operations are impossible, and when the amount is less than 60 parts by weight, the curing time is too slow to increase the overall working time, so it is preferable to have the limited parts by weight as described above.

Formaldehyde is a diluent for reacting with the compositions to provide flexibility and a predetermined viscosity. Based on 100 parts by weight of 1-decanol, when it exceeds 70 parts by weight, the overall flexibility of Solution B is too high and the viscosity is too low, and if it is less than 50 parts by weight, the overall flexibility of the liquid B is too low and the viscosity is too high, so that the stirrability and workability are reduced, so it is preferable to have the limited parts by weight as described above.

Benzophenone is a material that provides functions such as durability, whitening resistance and scratch resistance by having a predetermined hardness when spraying and applying the liquid A and the liquid B. Based on 100 parts by weight of the 1-decanol , If it exceeds 60 parts by weight, the hardness of the waterproofing layer becomes too strong, and the adhesion strength due to the lifting phenomenon from the surface of the structure or component decreases. , it is preferable to have a limited weight part as described above.

Sulphonic acid is a material that provides a function of improving the adhesive strength between the bonding member on the surface of the lower layer and the upper layer of the coating film waterproofing layer. Based on 100 parts by weight of 1-decanol, when it exceeds 50 parts by weight, the Although the adhesion between the lower layer and the upper layer surface is increased, the stirrability with other compositions is reduced, and when it is less than 30 parts by weight, the adhesive force between the lower layer and the upper surface of the coating film waterproof layer is lowered, and the bonding member construction of the upper layer is not thermally deformed. Therefore, it is preferable to have a limited weight part as described above.

Phenylmagnesium bromide is a material that enables self-leveling during spraying and application of solution A and solution B. Based on 100 parts by weight of 1-decanol, when it exceeds 40 parts by weight, flatness is increased, so that it is rather The sealing function is reduced due to a decrease in water expansibility, and when it is less than 20 parts by weight, the surface flatness is rather reduced and planarization workability is lowered, so it is preferable to have the limited parts by weight as described above.

Therefore, liquid B of the present invention contains 1-decanol, 2-methoxy-2-methyl-3-butanol, formaldehyde, benzophenone, sulfonic acid, and phenylmagnesium bromide in parts by weight less than the above ranges. In the case of having, the water expandability, impact resistance and adhesive strength are lowered, and in the case of having a weight part exceeding the above range, the viscosity is high, the stirring efficiency is lowered, and the adhesive force is lowered by hardening rather than to the surface of concrete or construction layer. Since it is separated and the waterproof and oxidizing function is reduced, it is preferable to have the same weight parts as described above.

On the other hand, in the present invention, the liquid A and the liquid B are mixed in a volume ratio of 3:1, respectively. Limiting the volume ratio to 3:1 is that when the volume ratio for mixing does not have the above ratio, stirrability is Since there is a problem in that this significantly decreases, water expandability, adhesive strength, oxidation function, flatness, etc. are deteriorated, it is preferable to mix in the same volume ratio as described above.

Hereinafter, the effect of the water-expandable polyurethane coating waterproofing material according to a preferred embodiment of the present invention will be described through specific examples.

To 100 parts by weight of phenyl isocyanate, 60 parts by weight of 3-chlorophenyl isocyanate, 50 parts by weight of methyl isocyanate, 40 parts by weight of carboxyl acid, 30 parts by weight of pyridine and 20 parts by weight of methyl iodide were mixed to prepare a solution A and 90 parts by weight of 2-methoxy-2-methyl-3-butanol, 80 parts by weight of formaldehyde, 70 parts by weight of benzophenone, 60 parts by weight of sulfonic acid, and 50 parts by weight of phenylmagnesium bromide to 100 parts by weight of 1-decanol. After mixing parts by weight to prepare solution B, the solution A and solution B are mixed in a volume ratio of 2:1 to prepare a polyurethane coating waterproofing material.

To 100 parts by weight of phenyl isocyanate, 80 parts by weight of 3-chlorophenyl isocyanate, 70 parts by weight of methyl isocyanate, 60 parts by weight of carboxyl acid, 50 parts by weight of pyridine and 40 parts by weight of methyl iodide were mixed to prepare a solution A and 70 parts by weight of 2-methoxy-2-methyl-3-butanol, 60 parts by weight of formaldehyde, 50 parts by weight of benzophenone, 40 parts by weight of sulfonic acid and 30 parts by weight of phenylmagnesium bromide to 100 parts by weight of 1-decanol. After mixing parts by weight to prepare solution B, the solution A and solution B are mixed in a volume ratio of 3:1 to prepare a polyurethane coating waterproofing material.

100 parts by weight of 3-chlorophenyl isocyanate, 90 parts by weight of methyl isocyanate, 80 parts by weight of carboxyl acid, 70 parts by weight of pyridine and 60 parts by weight of methyl iodide were mixed with 100 parts by weight of phenyl isocyanate to prepare a solution A and 50 parts by weight of 2-methoxy-2-methyl-3-butanol, 40 parts by weight of formaldehyde, 30 parts by weight of benzophenone, 20 parts by weight of sulfonic acid, and 10 parts by weight of phenylmagnesium bromide to 100 parts by weight of 1-decanol. After preparing the liquid B by mixing parts by weight, the step of mixing the liquid A and the liquid B in a volume ratio of 1:1, and the like.

Thereafter, the polyurethane coating waterproofing material manufactured according to Examples 1 to 3 and, as reference examples or evaluation examples thereof, a polyurethane coating waterproofing material product distributed in the market (Company A manufactured according to Korean Patent Registration No. 10-1771248) product) using a known method to make a polyurethane waterproof sheet, check the volume change after immersion in a water bath, and the results are shown in Table 1 below.

Therefore, it can be seen that the water-expandable polyurethane coating waterproofing material according to a preferred embodiment of the present invention has, as shown in Table 1, excellent physical properties in terms of water expansibility compared to conventional products, and through this, the crack site After the waterproofing layer is applied, it expands while absorbing water when in contact with water to improve sealing and waterproofing performance.

On the other hand, a laminated exposed composite waterproofing construction method using a water-expandable polyurethane coating waterproofing material according to a preferred embodiment of the present invention is as follows.

First, as shown in FIG. 1, the concrete surface for the construction of the polyurethane coating waterproofing material composed as described above is cleaned and treated by the worker, and a known urethane sealant is reinforced at the corner of the parapet so that the base surface is arranged. do.

After that, a known primer is sprayed on the base surface at a pressure of about 0.2 to 0.3 kg/m^2 and is applied stably without scattering around it.

Thereafter, the water-expandable polyurethane coating waterproofing material according to a preferred embodiment of the present invention is sprayed on the upper surface of the primer layer at a pressure of about 1.2 to 1.6 kg/m^2 and is applied stably without scattering around it.

After that, before the water-expandable polyurethane coating waterproofing material is cured, a high-elastic composite sheet is attached and a high-elastic composite sheet layer is installed. It is desirable to have excellent flatness and adhesive strength by being impregnated or attached to the waterproofing material.

Thereafter, after the water-expandable polyurethane coating film waterproofing material is cured, a known semi-rigid urethane coating film material is sprayed on the upper surface of the high-elasticity synthetic sheet layer at a pressure of about 1.2 to 1.4 kg/m², and is applied stably without scattering around it. .

Then, after the semi-rigid urethane coating material is cured, a known top coat layer is applied.

Therefore, according to the laminated exposed composite waterproofing construction method using the water-expandable polyurethane coating waterproofing material, the high-elasticity composite sheet layer is impregnated with the polyurethane coating waterproofing layer having excellent water-expansibility, so that the elasticity and waterproof function can be improved.

On the other hand, a laminated non-exposed composite waterproofing construction method using a water-expandable polyurethane coating waterproofing material according to a preferred embodiment of the present invention is as follows.

First, as shown in FIG. 2, the concrete surface for the construction of the polyurethane coating waterproofing material composed as described above is cleaned and treated by the worker, and a known urethane sealant is reinforced at the corner of the parapet to arrange the base surface. do.

After that, a known primer is sprayed on the base surface at a pressure of about 0.2 to 0.3 kg/m^2 and is applied stably without scattering around it.

Thereafter, the water-expandable polyurethane coating waterproofing material according to a preferred embodiment of the present invention is sprayed on the upper surface of the primer layer at a pressure of about 1.2 to 1.6 kg/m^2 and is applied stably without scattering around it.

After that, before the water-expandable polyurethane coating waterproofing material is cured, a high-elastic composite sheet is attached and a high-elastic composite sheet layer is installed. It is preferable to be impregnated or attached to the waterproofing material to have excellent tensile properties and adhesive strength.

After that, after the water-expandable polyurethane coating film waterproofing material is cured, a known soft urethane coating film material is sprayed on the upper surface of the high-elasticity synthetic sheet layer at a pressure of about 0.6 to 0.9 kg/m² and is applied stably without scattering around it.

Thereafter, a known high-density hard sheet is attached and installed before the flexible urethane coating material is cured, and the air between the bonding surfaces is removed through the edge portion while rubbing the high-density hard sheet to prevent possible swelling. The overlapping portion of the high-density rigid sheet is constructed with a width of about 40-50 mm.

Here, it is preferable that the overlapping portion of the high-density rigid sheet be reinforced while being covered by a known high-density rigid stretchable sheet having a width of about 40 to 50 mm, and the high-density rigid sheet is selectively constructed in terms of reinforcement when rust prevention is required. It can be, and through having a thickness of 0.07 ~ 0.12mm, it is possible to provide corrosion resistance, rustproof and waterproof protection.

Then, the pressed concrete layer is poured by a known method to a predetermined thickness on the upper surface of the high-density hard sheet layer.

Therefore, according to the laminated non-exposed composite waterproofing construction method using the water-expandable polyurethane coating waterproofing material, the flexible urethane coating layer and the high-density rigid sheet layer are compositely formed on the upper surface of the high-elastic composite sheet layer impregnated with the polyurethane coating waterproofing layer with excellent water expansibility. By doing so, it is possible to improve elasticity, and anti-rust and waterproof functions.

Therefore, according to the manufacturing method of the water-expandable polyurethane coating waterproofing material according to a preferred embodiment of the present invention and the laminated exposed and non-exposed composite waterproofing construction method using the same, the water-expandable polyurethane coating waterproofing material absorbs water and interferes with the flow of water. By maximizing the leak prevention function, the waterproof function can be improved.

Although preferred embodiments of the present invention have been described with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains may substitute variously within the scope without departing from the technical spirit or essential features of the present invention. and variations are possible, so it will be understood that the embodiments may be implemented in other specific forms. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

Claims (3)

70-90 parts by weight of 3-chlorophenyl isocyanate, 60-80 parts by weight of methyl isocyanate, 50-70 parts by weight of carboxyl acid, 40-60 parts by weight of pyridine and 30-50 parts by weight of methyl iodide are mixed in 100 parts by weight of phenyl isocyanate a step in which liquid A is prepared;
To 100 parts by weight of 1-decanol, 60 to 80 parts by weight of 2-methoxy-2-methyl-3-butanol, 50 to 70 parts by weight of formaldehyde, 40 to 60 parts by weight of benzophenone, 30 to 50 parts by weight of sulfonic acid and 20-40 parts by weight of phenylmagnesium bromide are mixed to prepare solution B;
A method for producing a water-expandable polyurethane coating waterproofing material comprising the step of mixing the liquid A and the liquid B in a volume ratio of 3:1. Step of cleaning and processing the concrete surface to arrange the base surface;
applying a primer to the base surface;
The step of applying the water-expandable polyurethane coating waterproofing material according to claim 1 to the primer layer;
Before the water-expandable polyurethane coating waterproofing material is cured, a high-elasticity composite sheet is attached to the high-elasticity composite sheet layer is installed;
forming a semi-rigid urethane coating layer by applying a semi-rigid urethane coating film to the upper surface of the highly elastic synthetic sheet layer after the water-expandable polyurethane coating waterproofing material is cured;
A laminated exposed composite waterproofing construction method using a water-expandable polyurethane coating waterproofing material, characterized in that it comprises the step of applying a top coat layer after the semi-rigid urethane coating material is cured. Step of cleaning and processing the concrete surface to arrange the base surface;
applying a primer to the base surface;
The step of applying the water-expandable polyurethane coating waterproofing material according to claim 1 to the primer layer;
Before the water-expandable polyurethane coating waterproofing material is cured, a high-elasticity composite sheet is attached to the high-elasticity composite sheet layer is installed;
After the water-expandable polyurethane coating film waterproofing material is cured, a flexible urethane coating film is applied to the upper surface of the highly elastic synthetic sheet layer to form a flexible urethane coating film;
a step of attaching a high-density hard sheet before the flexible urethane coating material is cured and installing a high-density hard sheet layer;
Laminate non-exposed composite waterproofing construction method using water-expandable polyurethane coating waterproofing material, characterized in that it comprises the step of pouring a pressed concrete layer to a predetermined thickness on the upper surface of the high-density rigid sheet layer.

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