KR101932244B1 - Polyurethane waterproof agent and manufacturing method thereof and waterproof method using thereof - Google Patents

Abstract

The purpose of the present invention is to provide a polyurethane film waterproofing agent which has excellent durability, chemical resistance, adhesive properties, aging resistance, ozone resistance, weatherability and heat resistance, and is excellent in workability during construction; a preparation method thereof; and a waterproofing method using the same. The polyurethane film waterproofing agent of the present invention comprises: a polyurethane main material prepared by making 60 to 80 parts by weight of 3-chloro-3-methylbutane, 50 to 70 parts by weight of 4-chloro-2-methylbutane, 40 to 60 parts by weight of ethyl isobutyl sulfide and 30 to 50 parts by weight of trichlorosilane react with 100 parts by weight of the complex isocyanate in a state that a complex isocyanate is prepared by mixing 2-methyl-1,5-pentamethylenediisocyanate with 1,12-dodecanediisocyanate at a volume ratio of 7:2; and a curing agent prepared by adding 70 to 90 parts by weight of 1,2,3-propanetriol, 60 to 80 parts by weight of 1,4-cyclohexanedimethanol, 50 to 70 parts by weight of 3-bromo-1,1,1-trichlorononane, 40 to 60 parts by weight of dimethyl terephthalate, 4 to 6 parts by weight of cobalt violet as an inorganic pigment, and 3 to 5 parts by weight of dioxazine as an organic pigment to 100 parts by weight of trimethylolpropane, wherein the main material and the curing agent are mixed in the polyurethane film waterproofing agent.

Description

TECHNICAL FIELD [0001] The present invention relates to a waterproofing agent for a polyurethane coating film, a method for producing the waterproofing agent,

The present invention relates to a polyurethane coating waterproofing agent, a method for producing the same, and a waterproofing method using the polyurethane coating waterproofing agent. More particularly, the present invention relates to a waterproofing agent for a polyurethane coating film which is excellent in durability, chemical resistance, adhesion, aging resistance, ozone resistance, weather resistance, A urethane coating waterproofing agent, a method for producing the same, and a waterproofing method using the same.

Polyurethane materials for civil engineering and architectural use are characterized by the fact that they can be applied seamlessly, which is characteristic of the material itself, and have chemical characteristics such as adhesiveness to the substrate, chemical resistance and durability, , And dimensional stability. Especially, because of its great advantage of excellent elongation, it is excellent in followability against cracks in the floor, and the demand for it is increasing as the inner, outer wall and floor waterproofing materials of buildings. However, since polyurethane materials having excellent properties for construction are produced separately from isocyanate prepolymer and polyol mixture at the production site, it is necessary to carry out various steps such as weighing, mixing, stirring and construction according to the formulation ratio determined at the construction site, And it is pointed out as a disadvantage that the labor cost is increased and the construction efficiency is decreased by increasing the construction cost as a whole.

In general, the two-part polyurethane material must use all of the agitated waterproofing agent within a limited pot life, so that the time interval between agitation and construction must be controlled well, and if this time is not met, the loss of material increases. In order to maintain the excellent physical and chemical properties of these polyurethane materials and to complement the disadvantages of the two-pack type, one-pack type polyurethane building materials have been studied. For example, an isocyanate prepolymer having an NCO weight percentage of about 1 to 5% And a filler, a stabilizer, a coloring agent and the like are added thereto to make a polyurethane material one-pack.

However, this method is disadvantageous in that the storage stability is lowered even if the curing time is slow at a room temperature and only a slight amount of water is present, and the carbon dioxide generated by the reaction of moisture and isocyanate is liable to cause blistering of the coating film.

To overcome such disadvantages, Japanese Patent Publication No. 5-75035 discloses a method for improving storage stability and curing rate using a catalyst of morpholino ethyl ether.

However, this method does not solve the problem of the swelling of the film due to the carbon dioxide.

Accordingly, in order to solve such a problem, United States Patent No. 4720535 or Japanese Patent Application Laid-Open No. 4-226522 discloses a method using a cypher base which is a latent curing agent. That is, a method in which a primary di- or triamine is reacted with an aldehyde to form a polyaldimine, which is mixed with an isocyanate prepolymer and used as a one-component material.

However, when such a polyadmin is mixed with isocyanate and used as a one-pack type urethane material, reactivity is high in a high temperature and high humidity environment, which is unsuitable for roof waterproofing of a summer building. That is, curing of the surface and the bottom of the coated film proceeds easily, but the penetration of moisture from the surface of the cured coated film is difficult, and the rate of progress of curing is slow, and the aldehyde which is disintegrated during curing frequently causes defects.

As another method of using a latent curing agent, British Patent No. 1575666 discloses a method in which a secondary amine is reacted with a ketone or an aldehyde to prepare a polyenamine and this is mixed with an isocyanate prepolymer to obtain a one-pack type. However, in this case, there is a disadvantage that it is necessary to use an isocyanate having a very low reactivity or to mask the isocyanate of the prepolymer and to use it as a construction material because of low storage stability.

Korean Patent Laid-Open Publication No. 1997-0065579 discloses that simultaneous presence of aldimine and ketimine enables the hardening rate to be controlled, allowing a low defect occurrence rate and even under adverse environmental conditions such as high temperature and high humidity such as summer season. However, It has a problem.

In addition, Korean Patent No. 10-0884015 discloses an exposed waterproof composite waterproof structure composed of an adhesive layer, an embossed polyvinyl chloride sheet layer, a urethane waterproof layer, and a top coat layer. However, before the polyurethane film waterproofing agent is applied When the sheet layer is formed, the solvent contained in the polyurethane is gradually absorbed into the polyvinyl chloride sheet layer to shrink the sheet. Further, since the embossed surface of the embossed sheet is located at the bottom, In this case, there is a problem that the front surface of the construction must be removed.

Accordingly, an object of the present invention is to provide a polyurethane coating waterproofing agent having excellent durability, chemical resistance, adhesion, aging resistance, ozone resistance, weather resistance and heat resistance, and excellent workability at the time of construction, a method for producing the same, and a waterproofing method using the same.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to the present invention, a mixture of 2-methyl-1,5-pentamethylene diisocyanate and 1,12-dodecane diisocyanate is mixed in a volume ratio of 7: 2 to prepare a composite isocyanate, and 100 parts by weight of the composite isocyanate 60 to 80 parts by weight of 3-chloro-3-methylbutane, 50 to 70 parts by weight of 4-chloro-2-methylbutane, 40 to 60 parts by weight of ethyl isobutyl sulfide and 30 to 50 parts by weight of trichlorosilane, Polyurethane-based material; To 100 parts by weight of trimethylolpropane, 70 to 90 parts by weight of 1,2,3-propanetriol, 60 to 80 parts by weight of 1,4-cyclohexanedimethanol, 3-bromo-1,1,1-trichlorononane A curing agent prepared by adding 40 to 60 parts by weight of dimethyl terephthalate, 4 to 6 parts by weight of cobalt violet as an inorganic pigment, and 3 to 5 parts by weight of an organic pigment as a curing agent, A mixed polyurethane film waterproofing agent is provided.

In addition, according to the present invention, in a state where 2-methyl-1,5-pentamethylene diisocyanate and 1,12-dodecane diisocyanate are mixed in a volume ratio of 7: 2 to prepare a composite isocyanate, 100 parts by weight of the composite isocyanate 60 to 80 parts by weight of 3-chloro-3-methylbutane, 50 to 70 parts by weight of 4-chloro-2-methylbutane, 40 to 60 parts by weight of ethyl isobutyl sulfide and 30 to 50 parts by weight of trichlorosilane, A step of producing a substrate; To 100 parts by weight of trimethylolpropane, 70 to 90 parts by weight of 1,2,3-propanetriol, 60 to 80 parts by weight of 1,4-cyclohexanedimethanol, 3-bromo-1,1,1-trichlorononane 40 to 60 parts by weight of dimethyl terephthalate, 4 to 6 parts by weight of cobalt violet as an inorganic pigment, and 3 to 5 parts by weight of an organic pigment as a dioxazine compound to prepare a curing agent; A step of mixing the polyurethane-based material and a curing agent is provided.

Therefore, according to the present invention, it has characteristics of excellent durability, chemical resistance, adhesiveness, aging resistance, ozone resistance, weather resistance and heat resistance, quick curing time and no bubbles, Problems arising in the liquid polyurethane coating film waterproofing agent, that is, hardening of the surface and the coating film easily proceed, but the penetration of moisture from the surface of the hardened coating film is difficult and the rate of progress of curing is slow, and the aldehyde- It is possible to prevent the phenomenon that occurs.

In addition, the above-mentioned polyurethane coating waterproofing composition is very useful as a waterproofing material for building roofs and civil engineering structures because it can maintain a strong resistance to cracks in concrete structures and form a highly durable waterproof layer free from air bubbles Available.

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

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

The polyurethane film coating waterproofing agent according to a preferred embodiment of the present invention is a waterproofing agent for polyurethane coating film obtained by mixing 2-methyl-1,5-pentamethylene diisocyanate and 1,12-dodecanediisocyanate in a mixed isocyanate- -Methylbutane, 4-chloro-2-methylbutane, ethylisobutylsulfide and trichlorosilane are reacted with trimethylolpropane in the presence of 1,2,3-propanetriol, 1,4-cyclohexane The curing agent prepared by adding hexane dimethanol, 3-bromo-1,1,1-trichlorononane, dimethyl terephthalate, cobalt violet as an inorganic pigment, and dioxazine as an organic pigment is mixed in a predetermined volume ratio.

Specifically, the polyurethane coating waterproofing agent of the present invention is a polyurethane coating waterproofing agent of the present invention, in which 2-methyl-1,5-pentamethylene diisocyanate and 1,12-dodecanediisocyanate are mixed in a volume ratio of 7: 2 to prepare a composite isocyanate, 60 to 80 parts by weight of 3-chloro-3-methylbutane, 50 to 70 parts by weight of 4-chloro-2-methylbutane, 40 to 60 parts by weight of ethyl isobutyl sulfide and 30 to 50 parts by weight of trichlorosilane To 100 parts by weight of trimethylolpropane was added 70 to 90 parts by weight of 1,2,3-propane triol, 60 to 80 parts by weight of 1,4-cyclohexanedimethanol, 3-bromo 50 to 70 parts by weight of 1,1,1-trichlorononane, 40 to 60 parts by weight of dimethyl terephthalate, 4 to 6 parts by weight of cobalt violet as an inorganic pigment, and 3 to 5 parts by weight of an organic pigment, And the curing agent are mixed at a volume ratio of 5: 1.

Meanwhile, a method for producing a polyurethane coating waterproofing agent according to a preferred embodiment of the present invention comprises mixing 2-methyl-1,5-pentamethylene diisocyanate and 1,12-dodecane diisocyanate in a volume ratio of 7: 2, 60 to 80 parts by weight of 3-chloro-3-methylbutane, 50 to 70 parts by weight of 4-chloro-2-methylbutane, 40 to 60 parts by weight of ethyl isobutyl sulfide, 30 to 50 parts by weight of trichlorosilane is reacted to produce a polyurethane precursor; and 100 parts by weight of trimethylolpropane is mixed with 70 to 90 parts by weight of 1,2,3-propanetriol, 1,4-cyclohexanedimethanol 60 50 to 70 parts by weight of 3-bromo-1,1,1-trichlorononane, 40 to 60 parts by weight of dimethylterephthalate, 4 to 6 parts by weight of cobalt violet as an inorganic pigment, 3 to 5 parts by weight of a curing agent is added to prepare a curing agent; And a step to be mixed in a volume ratio of 1: Tan presence and the curing agent is 5 respectively.

That is, according to the present invention, in the state that 2-methyl-1,5-pentamethylene diisocyanate and 1,12-dodecanediisocyanate are mixed with each other to produce a composite isocyanate, 3-chloro- Chloro-2-methylbutane, ethyl isobutyl sulfide and trichlorosilane are reacted with trimethylolpropane in the presence of 1,2,3-propanetriol, 1,4-cyclohexanedimethanol, 3- Bromo-1,1,1-trichlorononane, dimethyl terephthalate, cobalt violet as an inorganic pigment, and dioxazine as an organic pigment are added to form a urethane bond upon mixing with a curing agent prepared by mixing them.

Thus, the polyurethane-based material was prepared by mixing 3-methyl-1,5-pentamethylene diisocyanate and 1,12-dodecane diisocyanate in a ratio of 7: 2 to 100 parts by weight of the composite isocyanate, 60 to 80 parts by weight of 4-chloro-3-methylbutane, 50 to 70 parts by weight of 4-chloro-2-methylbutane, 40 to 60 parts by weight of ethyl isobutyl sulfide and 30 to 50 parts by weight of trichlorosilane desirable.

Here, the composite isocyanate, which is a mixture of 2-methyl-1,5-pentamethylene diisocyanate and 1,12-dodecane diisocyanate, provides an adsorption and adhesion function, To convert the compositions to urethane and to terminate the reaction.

On the other hand, in the composite isocyanate, 2-methyl-1,5-pentamethylene diisocyanate and 1,12-dodecane diisocyanate are mixed in a ratio of 7: 2.

The above-mentioned 2-methyl-1,5-pentamethylene diisocyanate is a substance which determines the reaction time and provides an adsorption function. When it exceeds 7 volume ratio, the reaction rate of the above-mentioned compositions becomes too fast, If the volume ratio is less than 7, the reaction speed of the compositions becomes too slow, which increases the working time.

Also, the 1,12-dodecane diisocyanate reacts with the above-mentioned compositions to form a urethane bond. When the volume ratio is more than 2, the viscosity becomes too large, which makes the stirring operation with the above compositions inconvenient, 2 volume ratio, the storage stability of the composite is poor and the adhesive strength of the coating film is deteriorated.

Accordingly, it is preferable that the composite isocyanate has a limited volume ratio as described above, thereby providing improved effects such as agility, stability, workability, and workability.

The polyurethane based material according to the present invention is obtained by mixing 60 to 80 parts by weight of 3-chloro-3-methylbutane, 100 parts by weight of 4-chloro-2-methylbutane 50 To 70 parts by weight, ethyl isobutyl sulfide 40 to 60 parts by weight, and trichlorosilane 30 to 50 parts by weight.

Here, the 3-chloro-3-methylbutane reacts with the above-mentioned compositions to provide a coating function. When the amount of the 3-chloro-3-methylbutane exceeds 80 parts by weight based on 100 parts by weight of the composite isocyanate, When the amount is less than 60 parts by weight, the coating degree of the waterproof film becomes too small.

The 4-chloro-2-methylbutane is a diluent for reacting with the above-mentioned compound or the like to provide a predetermined viscosity. When the amount of the 4-chloro-2-methylbutane exceeds 70 parts by weight based on 100 parts by weight of the composite isocyanate, If the amount is less than 50 parts by weight, the overall viscosity of the host material becomes too large, and the stirring efficiency with the curing agent is lowered.

The ethylisobutylsulfide reacts with the above-mentioned compound or the like to form a urethane bond through a predetermined viscosity. When the amount of the ethylisobutylsulfide exceeds 60 parts by weight based on 100 parts by weight of the composite isocyanate, the viscosity becomes too large, When the amount is less than the weight part, the viscosity becomes too small and the workability is deteriorated.

When the amount of the trichlorosilane exceeds 50 parts by weight based on 100 parts by weight of the composite isocyanate, the overall adhesion of the host material is strong, but the workability is deteriorated. If it is less than 30 parts by weight, there is a problem that it is easily peeled off from the concrete surface.

Thus, the polyurethane-based material may be a polyurethane-based material having the same limited weight portion as the above-mentioned polyisocyanate based on the above-mentioned 3-chloro-3-methylbutane, 4-chloro-2-methylbutane, ethylisobutylsulfide and trichlorosilane It is desirable to provide an improved coating and stability of the waterproof film.

Therefore, when the weight of the composition is less than the above-mentioned range, the overall adhesion strength of the coating film water repellent agent is lowered and the range , The viscosity of the coating film water repellent agent becomes too large and the workability is lowered. Therefore, it is preferable to have the weight portion as described above.

On the other hand, it is also possible to use trimethylolpropane, 1,2,3-propanetriol, 1,4-cyclohexanedimethanol, 3-bromo-1,1,1-trichlorononane, dimethyl terephthalate, The curing agent prepared by adding an organic pigment such as a dioxazine is not limited to a resin having excellent physical properties such as heat resistance, moisture resistance, mechanical properties, and processability as well as having an improved impact strength by reacting with the polyurethane- .

The curing agent is a mixture of 100 parts by weight of trimethylolpropane with 70 to 90 parts by weight of 1,2,3-propanetriol, 60 to 80 parts by weight of 1,4-cyclohexanedimethanol based on 100 parts by weight of trimethylolpropane 50 to 70 parts by weight of 3-bromo-1,1,1-trichlorononane, 40 to 60 parts by weight of dimethylterephthalate, 4 to 6 parts by weight of cobalt violet as an inorganic pigment, and 3 to 5 parts by weight of an organic pigment, It is preferable that a curing agent is produced.

Here, the trimethylolpropane is a material that provides a function of a plasticizer and provides predetermined durability through curing of the polyurethane-based material.

In addition, the 1,2,3-propanetriol provides a function of controlling the time (curing time for injection). When the amount of the 1,2,3-propanetriol exceeds 90 parts by weight based on 100 parts by weight of trimethylolpropane, The spraying and coating operation becomes impossible. If the amount is less than 70 parts by weight, the curing time is too slow to increase the total working time.

Also, the 1,4-cyclohexane dimethanol is a substance that controls the pot life with 1,2,3-propanetriol. When the amount is more than 80 parts by weight based on 100 parts by weight of the trimethylolpropane, The spraying and coating operation becomes impossible. When the amount is less than 60 parts by weight, the curing time is too slow to increase the total working time.

The 3-bromo-1,1,1-trichlorononane is a substance that enables self-leveling when spraying and coating the main material with a curing agent. The 3-bromo-1,1,1-trichlorononane is more than 70 parts by weight based on 100 parts by weight of trimethylolpropane , The flatness is increased and the workability on the sloped surface or the like is lowered. When the amount is less than 50 parts by weight, the flatness is lowered and the workability is lowered on the flat surface.

The dimethyl terephthalate is a substance that enables self-leveling when spraying and coating the base material and the curing agent together with the 3-bromo-1,1,1-trichlorononane, wherein the amount of the terephthalate based on 100 parts by weight of trimethylolpropane When the amount is more than 60 parts by weight, the flatness is increased and the flatness is lowered at the time of partial cracking. When the amount is less than 40 parts by weight, the surface flatness is lowered and the planarization workability is deteriorated.

The cobalt violet and the dioxazine each are an inorganic pigment and an organic pigment, respectively, in the case of exceeding 6 parts by weight and 5 parts by weight or less and 4 parts by weight and 3 parts by weight, respectively, based on 100 parts by weight of the trimethylolpropane, There is a problem that the esthetic feeling of the user is deteriorated.

Accordingly, the curing agent of the present invention has an impact strength and an adhesive strength lowered when the weight of the composition is less than the above range, based on the weight of the trimethylolpropane, The viscosity is so high that the stirring efficiency is lowered and the hardness is hardened to deteriorate the adhesive strength. As a result, the waterproof and oxidation function deteriorates due to separation from the concrete surface.

Meanwhile, in the present invention, the polyurethane base material and the curing agent are mixed at a volume ratio of 5: 1, respectively. The volume ratio is limited to 5: 1 in the case where the volume ratio for mixing does not have the above ratio, And the bonding strength, the oxidizing function, and the flatness are lowered. Therefore, it is preferable that the matrix and the curing agent are mixed at the same volume ratio.

Hereinafter, the effects of the polyurethane coating waterproofing agent according to the preferred embodiment of the present invention will be described with reference to specific examples.

Methyl-1,5-pentamethylene diisocyanate and 1,12-dodecanediisocyanate were mixed in a volume ratio of 7: 2 to prepare a composite isocyanate. To 100 parts by weight of the composite isocyanate, 3-chloro-3-methyl 60 parts by weight of butane, 50 parts by weight of 4-chloro-2-methylbutane, 40 parts by weight of ethyl isobutyl sulfide and 30 parts by weight of trichlorosilane were reacted to prepare a polyurethane base material. In 100 parts by weight of trimethylolpropane, 70 parts by weight of 3-propanetriol, 60 parts by weight of 1,4-cyclohexanedimethanol, 50 parts by weight of 3-bromo-1,1,1-trichlorononane, 40 parts by weight of dimethylterephthalate, 4 parts by weight of cobalt violet and 3 parts by weight of dioxane as an organic pigment are added to prepare a curing agent. The polyurethane coating material and the curing agent are mixed at a volume ratio of 5: 1 to prepare a polyurethane coating waterproofing agent.

Methyl-1,5-pentamethylene diisocyanate and 1,12-dodecanediisocyanate were mixed in a volume ratio of 7: 2 to prepare a composite isocyanate. To 100 parts by weight of the composite isocyanate, 3-chloro-3-methyl 70 parts by weight of butane, 60 parts by weight of 4-chloro-2-methylbutane, 50 parts by weight of ethyl isobutyl sulfide and 40 parts by weight of trichlorosilane were reacted to prepare a polyurethane residual material. In 100 parts by weight of trimethylolpropane, , 80 parts by weight of 3-propanetriol, 70 parts by weight of 1,4-cyclohexanedimethanol, 60 parts by weight of 3-bromo-1,1,1-trichlorononane, 50 parts by weight of dimethylterephthalate, 5 parts by weight of cobalt violet and 4 parts by weight of dioxane as an organic pigment were added to prepare a curing agent. The polyurethane-based curing agent and the curing agent were mixed at a volume ratio of 5: 1 to prepare a polyurethane coating waterproofing agent.

Methyl-1,5-pentamethylene diisocyanate and 1,12-dodecanediisocyanate were mixed in a volume ratio of 7: 2 to prepare a composite isocyanate. To 100 parts by weight of the composite isocyanate, 3-chloro-3-methyl 80 parts by weight of butane, 70 parts by weight of 4-chloro-2-methylbutane, 60 parts by weight of ethyl isobutyl sulfide and 50 parts by weight of trichlorosilane were reacted to prepare a polyurethane base material. In 100 parts by weight of trimethylolpropane, 90 parts by weight of 3-propanetriol, 80 parts by weight of 1,4-cyclohexanedimethanol, 70 parts by weight of 3-bromo-1,1,1-trichlorononane, 60 parts by weight of dimethylterephthalate, 6 parts by weight of cobalt violet and 5 parts by weight of dioxane as an organic pigment are added to prepare a curing agent. The polyurethane-based curing agent and the curing agent are mixed at a volume ratio of 5: 1 to prepare a polyurethane coating waterproofing agent.

As a coating film waterproofing composition prepared according to the above Examples 1 to 3 and a reference example or an evaluation example, a polyurethane waterproofing product manufactured in accordance with KSF3211 as a test piece and commercially available (Korean Patent No. 10-1771248 The results are shown in Table 1 below.

Therefore, as shown in Table 1, the polyurethane coating waterproofing agent according to the preferred embodiment of the present invention is superior in all parts such as tensile strength, elongation, tear strength and tensile performance after degradation treatment It can be seen that it has very good physical properties.

Meanwhile, the waterproofing method using the polyurethane coating waterproofing agent according to the preferred embodiment of the present invention is as follows.

First, the surface of the concrete for the construction of the polyurethane coating waterproofing agent to be formed as described above is cleaned and treated by the operator.

Here, the cleaning of the concrete surface includes removing dust, contaminants, or oil adhering to the concrete surface and smoothly treating protrusions on the surface to be applied.

Meanwhile, 2-methyl-1,5-pentamethylene diisocyanate and 1,12-dodecanediisocyanate were mixed in a volume ratio of 7: 2 to prepare a composite isocyanate. To 100 parts by weight of the composite isocyanate, 3-chloro- 60 to 80 parts by weight of methylbutane, 50 to 70 parts by weight of 4-chloro-2-methylbutane, 40 to 60 parts by weight of ethyl isobutyl sulfide and 30 to 50 parts by weight of trichlorosilane are reacted to prepare a polyurethane- And 100 parts by weight of trimethylolpropane are mixed with 70 to 90 parts by weight of 1,2,3-propane triol, 60 to 80 parts by weight of 1,4-cyclohexanedimethanol, 3-bromo-1,1,1- 40 to 60 parts by weight of dimethyl terephthalate, 4 to 6 parts by weight of cobalt violet as an inorganic pigment, and 3 to 5 parts by weight of an organic pigment as a dyestuff to produce a curing agent, In the step of mixing the base material and the curing agent at a volume ratio of 5: 1, The carbon film is made of waterproof agent.

Thereafter, the polyurethane coating material prepared as described above is coated or sprayed to coat the coating film.

Therefore, according to the preferred embodiment of the present invention, the polyurethane coating waterproofing agent and the waterproofing method using the polyurethane coating water composition as described above are excellent in tensile strength, low temperature flexibility, It exhibits excellent impact resistance, adhesiveness, chemical resistance and abrasion resistance. Even when applied at a thickness of 2 mm at a time, the curing time is quick, the surface cracks and bubbles do not occur and durability is excellent. Can be prevented.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. It will be understood that the invention may be embodied otherwise. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

Claims (4)

Methyl-1,5-pentamethylene diisocyanate and 1,12-dodecanediisocyanate were mixed in a volume ratio of 7: 2 to prepare a composite isocyanate. To 100 parts by weight of the composite isocyanate, 3-chloro-3-methyl 60 to 80 parts by weight of butane, 50 to 70 parts by weight of 4-chloro-2-methylbutane, 40 to 60 parts by weight of ethyl isobutyl sulfide and 30 to 50 parts by weight of trichlorosilane;
To 100 parts by weight of trimethylolpropane, 70 to 90 parts by weight of 1,2,3-propanetriol, 60 to 80 parts by weight of 1,4-cyclohexanedimethanol, 3-bromo-1,1,1-trichlorononane A curing agent prepared by adding 40 to 60 parts by weight of dimethyl terephthalate, 4 to 6 parts by weight of cobalt violet as an inorganic pigment, and 3 to 5 parts by weight of an organic pigment,
Wherein the main material and the curing agent are mixed. Methyl-1,5-pentamethylene diisocyanate and 1,12-dodecanediisocyanate were mixed in a volume ratio of 7: 2 to prepare a composite isocyanate. To 100 parts by weight of the composite isocyanate, 3-chloro-3-methyl 60 to 80 parts by weight of butane, 50 to 70 parts by weight of 4-chloro-2-methylbutane, 40 to 60 parts by weight of ethyl isobutyl sulfide and 30 to 50 parts by weight of trichlorosilane are reacted to prepare a polyurethane precursor;
To 100 parts by weight of trimethylolpropane, 70 to 90 parts by weight of 1,2,3-propanetriol, 60 to 80 parts by weight of 1,4-cyclohexanedimethanol, 3-bromo-1,1,1-trichlorononane 40 to 60 parts by weight of dimethyl terephthalate, 4 to 6 parts by weight of cobalt violet as an inorganic pigment, and 3 to 5 parts by weight of an organic pigment as a dioxazine compound to prepare a curing agent;
And mixing the polyurethane-based material with a curing agent. 3. The method of claim 2,
Wherein the main material and the curing agent are mixed at a volume ratio of 5: 1. A step of cleaning the concrete surface;
A process for producing a polyurethane coating film waterproofing agent according to claim 2 or 3, comprising the steps of: preparing a polyurethane coating waterproofing agent;
Wherein the waterproofing agent for polyurethane coating is coated or sprayed on the surface of concrete to thereby coat waterproofing the coating film.