KR102340369B1 - Polyurea waterproofing material with excellent thermal insulation properties, and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a polyurea waterproofing material which has excellent thermal insulation properties by being manufactured by conducting reaction of a first agent comprising prepolymer with an isocyanate group end; and a second agent comprising a first polyether amine, surface-modified graphene oxide, and surface-modified heat-insulating particles.

Description

Polyurea waterproofing material with excellent thermal insulation properties, and manufacturing method thereof

The present invention relates to a polyurea coating film waterproofing material having excellent thermal insulation properties and a method for manufacturing the same.

Because polyurea resin has high mechanical properties, it can exhibit superior durability compared to organic coating materials represented by urethane and epoxy. In addition, polyurea resin has a fast curing speed, so construction time is short, and it has hydrophobicity compared to urethane or epoxy resin, so it can be applied directly to a wet or low-temperature surface, and its heat resistance is strong, so the scope of application is expanded. is becoming

In general, the polyurea coating film mainly used an aromatic compound as a diisocyanate to secure a fast curing speed, excellent durability, and chemical resistance.

In order to solve this problem, a method of using an aliphatic diisocyanate instead of an aromatic diisocyanate has been proposed.

Korean Patent Registration No. 10-2160782 has been proposed as a similar prior document.

On the other hand, solar thermal energy in summer in Korea reaches an average of 5,900 ㎉/㎡ per day, and the temperature of the surface of buildings and roads rises by this solar thermal energy. Accordingly, the energy consumption required for cooling in hot summer is gradually increasing.

Therefore, it minimizes the change in the surface temperature of the building by allowing the building to reflect sunlight in advance or block the movement of heat energy by infrared rays absorbed by the external surface of the building to the inside of the building, thereby reducing the energy consumption used for cooling in the building. There is a need.

Republic of Korea Patent Registration No. 10-2160782 (2020.09.22)

In order to solve the above problems, an object of the present invention is to provide a polyurea waterproofing film having excellent heat shielding properties and a method for manufacturing the same.

In addition, an object of the present invention is to provide a polyurea waterproofing film having less yellowing and excellent tensile strength and adhesion, and a method for manufacturing the same.

However, the above purpose is illustrative, and the technical spirit of the present invention is not limited thereto.

One aspect of the present invention for achieving the above object is a first agent comprising an isocyanate group-terminated prepolymer; and a second agent comprising a first polyetheramine, a surface-modified graphene oxide, and a surface-modified heat-insulating particle; to a polyurea coating waterproofing material prepared by reacting.

In one aspect, the surface-modified graphene oxide and the surface-modified heat shielding particles may be surface-modified with an amine group-containing silane compound.

In one aspect, the isocyanate group-terminated prepolymer may be prepared from aliphatic diisocyanate, aromatic diisocyanate, second polyetheramine, and polyhexamethylene carbonate diol.

In one aspect, the molar ratio of the aliphatic diisocyanate to the aromatic diisocyanate may be 1:0.1 to 0.5.

In one aspect, the molar ratio of the second polyetheramine: polyhexamethylene carbonate diol may be 1: 0.01 to 0.2.

In another aspect of the present invention, a) a first agent comprising an isocyanate group-terminated prepolymer; and a second agent comprising a first polyetheramine, surface-modified graphene oxide, and surface-modified heat-insulating particles; mixing preparing a mixture; and b) curing the mixture after applying the mixture to the base surface.

The polyurea waterproofing film according to the present invention comprises: a first agent comprising an isocyanate group-terminated prepolymer; and a second agent comprising a first polyetheramine, surface-modified graphene, and surface-modified heat-insulating particles; as prepared by reacting, waterproof properties and heat-shielding properties may be excellent.

In addition, by using an isocyanate group-terminated prepolymer prepared from aliphatic diisocyanate, aromatic diisocyanate, secondary polyetheramine and polyhexamethylene carbonate diol, the yellowing phenomenon is reduced, and a polyurea waterproofing film excellent in tensile strength and adhesion is produced. can provide

Hereinafter, a polyurea waterproofing film excellent in heat shielding properties and a method for manufacturing the same according to the present invention will be described in detail. The drawings introduced below are provided as examples so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms, and the drawings presented below may be exaggerated to clarify the spirit of the present invention. At this time, if there is no other definition in the technical terms and scientific terms used, it has the meaning commonly understood by those of ordinary skill in the art to which this invention belongs, and the gist of the present invention in the following description and accompanying drawings Descriptions of known functions and configurations that may be unnecessarily obscure will be omitted.

A polyurea coating film waterproofing material according to an aspect of the present invention comprises: a first agent comprising an isocyanate group-terminated prepolymer; and a second agent comprising a first polyetheramine, surface-modified graphene, and surface-modified heat-insulating particles.

Accordingly, it is possible to provide a waterproofing material with a polyurea coating film having excellent waterproof and heat shielding properties.

Hereinafter, the polyurea coating film waterproofing material according to an example of the present invention will be described in more detail.

First, the first agent, which is the subject part, will be described.

As described above, the first agent according to an embodiment of the present invention may include an isocyanate group-terminated prepolymer, and specifically, prepared from aliphatic diisocyanate, aromatic diisocyanate, second polyetheramine and polyhexamethylene carbonate diol isocyanate group-terminated prepolymer.

As such, polyurea having excellent tensile strength and adhesion while reducing yellowing when reacting with polyhexamethylene carbonate diol and polyetheramine using aromatic diisocyanate without using only aliphatic diisocyanate as the diisocyanate A coating film waterproofing material can be provided.

For this purpose, it is preferable to appropriately control the ratio of each component. When too much aromatic diisocyanate is added, the effect of reducing the yellowing phenomenon may be insignificant, and when too much aliphatic diisocyanate is added, the yellowing phenomenon is reduced, but tensile strength Strength and adhesion may be reduced.

Preferably, the molar ratio of the aliphatic diisocyanate to the aromatic diisocyanate may be 1:0.1 to 0.5, more preferably 1:0.1 to 0.3, even more preferably 1:0.2 to 0.3. In this range, it is possible to effectively prevent yellowing and maintain excellent tensile strength and adhesion.

At this time, even if the aliphatic diisocyanate is used in the above molar ratio range, the tensile strength may decrease when too little polyhexamethylene carbonate diol is added. It's not good to be able

Preferably, the molar ratio of the second polyetheramine: polyhexamethylene carbonate diol may be 1: 0.01 to 0.2, more preferably 1: 0.01 to 0.1, even more preferably 1: 0.05 to 0.1. In this range, the polyurea prepared from the prepolymer reacted with the aliphatic diisocyanate and the aromatic diisocyanate satisfying the molar ratio range can maintain excellent tensile strength, and the lifting phenomenon after construction may not occur.

In addition, the diisocyanate compound composed of the aliphatic diisocyanate and the aromatic diisocyanate and the active hydrogen group-containing compound composed of the second polyetheramine and polyhexamethylene carbonate diol must be reacted in an appropriate molar ratio to synthesize an isocyanate group-terminated prepolymer, As a specific example, the molar ratio of the diisocyanate compound: the active hydrogen group-containing compound may be 1: 0.5 to 1, more preferably 1: 0.7 to 0.9.

Meanwhile, in one embodiment of the present invention, the aliphatic diisocyanate is any one or two or more selected from the group consisting of tetramethylene diisocyanate, pentamethylene diisocyanate, and hexamethylene diisocyanate, and the aromatic diisocyanate is toluene diisocyanate. And it may be any one or two or more selected from the group consisting of diphenylmethane diisocyanate. By using these as a diisocyanate compound, it is possible to improve the adhesion to the substrate after construction.

In an example of the present invention, the second polyetheramine may be used without particular limitation as long as it is a polyetheramine commonly used in the art, and preferably has a weight average molecular weight of 200 to 5000 g/mol, and a functional group Two to three aliphatic polyetheramines can be used, and more preferably, an aliphatic polyetheramine having a weight average molecular weight of 500 to 3000 g/mol and having two to three functional groups is used as a polyurea coating film waterproofing material with excellent tensile strength. It is preferable to form

In an example of the present invention, the polyhexamethylene carbonate diol may have a weight average molecular weight of 500 to 5000 g/mol, and more preferably, use a weight average molecular weight of 1000 to 3000 g/mol for durability. It is preferable in forming an excellent polyurea coating film waterproofing material.

Next, the 2nd agent which is a hardening|curing agent part is demonstrated. As described above, the second agent according to an embodiment of the present invention may include a second polyetheramine, surface-modified graphene, and surface-modified heat shielding particles. Through this, it is possible to provide a waterproofing material for a polyurea coating film having higher waterproof and heat shielding properties.

The second agent may be mixed in an amount of 50 to 200 parts by weight based on 100 parts by weight of the first agent, preferably 70 to 180 parts by weight, more preferably 100 to 150 parts by weight, but the first agent and the second agent It goes without saying that the mixing ratio can be adjusted according to the content of reactive groups (isocyanate groups and amine groups, etc.) contained in the agent.

Meanwhile, in an example of the present invention, the first polyetheramine may be the same as or different from the above-described second polyetheramine, and specifically, for example, a weight average molecular weight of 200 to 5000 g/mol, and a functional group An aliphatic polyetheramine having 2 to 3 can be used, and more preferably, an aliphatic polyetheramine having a weight average molecular weight of 500 to 3000 g/mol and having 2 to 3 functional groups is used as a polyurea coating film with excellent tensile strength. It is preferable in forming a waterproofing material.

In one embodiment of the present invention, the surface-modified graphene oxide is added to improve the waterproofness and heat insulation effect of the coating film waterproofing material. Specifically, the surface-modified graphene oxide is surface-modified with an amine group-containing silane compound. it may have been As such, by using graphene oxide surface-modified with an amine group-containing silane compound, a covalent bond between graphene oxide and polyurea is induced, so that the graphene oxide in the coating film is uniformly dispersed, thereby securing excellent waterproof and thermal insulation properties, It is possible to effectively prevent defects such as pinholes due to improved compatibility.

In this case, the graphene oxide may be prepared by exfoliating graphite through the Hummer method, and may be single-layer graphene oxide or similar graphene (graphite) in which several to tens of graphene oxide layers are stacked. As such graphene oxide is manufactured through a simple process of exfoliating graphite using a strong acid and an oxidizing agent, it is possible to reduce manufacturing costs compared to graphene or reduced graphene oxide. Since the oxygen functional group is formed, the surface can be easily modified with an amine group-containing silane compound later, so that the graphene oxide in the second agent can be more uniformly dispersed.

On the other hand, the amine group-containing silane compound used for surface modification of graphene oxide is 3-aminopropyl trimethoxysilane, 3-aminopropyl triethoxysilane, 3-aminopropyl methyldiethoxysilane, N-(2-amino Ethyl)-3-aminopropyl trimethoxysilane, 2-aminopropyl-3-aminopropyl trimethoxysilane, 2-aminopropyl-3-aminopropyl triethoxysilane, 2-aminoethyl-2-aminoethyl- It may be any one or two or more selected from the group consisting of 3-aminopropyl trimethoxysilane and 2-aminoethyl-2-aminoethyl-3-aminopropyltriethoxysilane.

The surface-modified graphene oxide may be added in an amount of 1 to 10 parts by weight, preferably 3 to 8 parts by weight, based on 100 parts by weight of the first polyetheramine. In this range, the waterproof and thermal insulation effect is excellent. On the other hand, when the surface-modified graphene oxide is added in an amount of less than 1 part by weight, the effect of improving waterproofing and thermal insulation properties is insignificant, and when it is added in an amount of more than 10 parts by weight, the effect of improving the additional heat shielding performance is insignificant, while the adhesion of the coating film waterproofing material is insignificant. This is not good as this may decrease the waterproofness.

In one embodiment of the present invention, the surface-modified heat shielding particles effectively reflect infrared rays that generate thermal energy in sunlight to suppress the conversion of infrared rays into thermal energy, which is also surface-modified with an amine group-containing silane compound. it could be As such, by using the heat shielding particles surface-modified with an amine group-containing silane compound, a covalent bond between the heat shielding particles and polyurea is induced, so that the heat shielding particles in the coating film are uniformly dispersed, thereby securing excellent heat shielding properties.

In this case, the heat shielding particles may be used without particular limitation as long as they are commonly used in the art, and it is preferable to use metal oxide particles having excellent infrared reflection effect. As a specific example, the heat shielding particles are selected from the group consisting of antimony tin oxide (ATO), indium tin oxide (ITO), cesium tungsten oxide (CWO) and antimony trioxide-zinc oxide (Sb ₂ O ₃ -ZnO). It may be one or two or more. Such metal oxide particles have an advantage in that they can effectively reflect infrared rays that generate thermal energy to provide excellent heat shielding performance.

The shape of such heat-shielding particles may be a particle shape such as a spherical shape, a rod shape, a needle shape, or a hollow shape, and the average particle size of the heat-shielding particle may be 2 to 200 nm, more preferably 5 to 100 nm can In such a range, the heat shielding effect is particularly excellent.

On the other hand, the amine group-containing silane compound used for surface modification of the heat shielding particles is 3-aminopropyl trimethoxysilane, 3-aminopropyl triethoxysilane, 3-aminopropyl methyldiethoxysilane, N-(2-aminoethyl). )-3-Aminopropyl trimethoxysilane, 2-aminopropyl-3-aminopropyl trimethoxysilane, 2-aminopropyl-3-aminopropyl triethoxysilane, 2-aminoethyl-2-aminoethyl-3 It may be any one or two or more selected from the group consisting of -aminopropyl trimethoxysilane and 2-aminoethyl-2-aminoethyl-3-aminopropyltriethoxysilane.

The surface-modified heat shielding particles may be added in an amount of 5 to 30 parts by weight, preferably 10 to 20 parts by weight, based on 100 parts by weight of the first polyetheramine. In such a range, the heat shielding effect is excellent. On the other hand, when the surface-modified heat shielding particles are added in less than 5 parts by weight, the heat shielding effect due to infrared reflection is insignificant. Not good.

Furthermore, the second agent according to an embodiment of the present invention may further include an antioxidant and a UV stabilizer, and through this, it is possible to further suppress yellowing of the waterproofing polyurea coating film due to sunlight.

In one embodiment of the present invention, the antioxidant may be a hindered phenol-based antioxidant, and as a specific example, 4,4'-methylene-bis(2,6-di-t-butylphenol), octadecyl -3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate and pentaerythritol tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)prop cionate] may be any one or two or more selected from the group consisting of.

The antioxidant may be added in an amount of 0.1 to 3 parts by weight, preferably 0.5 to 2 parts by weight, based on 100 parts by weight of the first polyetheramine. In such a range, the desired effect can be achieved.

In one embodiment of the present invention, the ultraviolet stabilizer may use a hindered amine-based ultraviolet stabilizer, as a specific example, 2-(3,5-di-t-butyl-4-hydroxyphenyl)-2-n -Butylmalonic acid bis(1,2,2,6,6-pentamethyl-4-piperidyl), bis(1,2,2,6,6-pentamethyl-4-piperidyl)[[3 ,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]butylmalonate, bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl)ceba Kate, consisting of bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate, and bis(1,2,2,6,6-pentamethyl-4-piperidyl)sebacate It may be any one or two or more selected from the group.

The ultraviolet stabilizer may be added in an amount of 0.1 to 3 parts by weight, preferably 0.5 to 2 parts by weight, based on 100 parts by weight of the first polyetheramine. In such a range, the desired effect can be achieved.

In addition to this, the first or second agent may further include any one or two or more additives selected from the group consisting of catalysts, color pigments, plasticizers and defoamers, etc., if necessary, and specific types and contents are conventional may be selected within the range.

In addition, another aspect of the present invention relates to a method for producing the above-described polyurea coating film waterproofing material, specifically, a) a first agent comprising an isocyanate group-terminated prepolymer; and a first polyetheramine, surface-modified graphene and a second agent including surface-modified heat-insulating particles; preparing a mixture of a mixture; and b) curing the mixture after applying the mixture to the substrate.

At this time, since each component of the first agent and the second agent is the same as described above, a redundant description is omitted, and the mixing method, application method, and curing method of the first agent and the second agent are commonly used in the art. It can be carried out depending on the construction method being used.

Hereinafter, the polyurea waterproofing film excellent in heat shielding properties according to the present invention and a manufacturing method thereof will be described in more detail through examples. However, the following examples are only a reference for describing the present invention in detail, and the present invention is not limited thereto, and may be implemented in various forms.

Also, unless otherwise defined, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of effectively describing particular embodiments only and is not intended to limit the invention. In addition, the unit of additives not specifically described in the specification may be weight %.

1) Surface-modified graphene oxide and heat shielding particles

After dissolving 1 ml of 3-aminopropyl triethoxysilane in 100 ml of ethylcellusolve, 250 ml of graphene oxide dispersed in water (4 mg/ml, in H ₂ O, D ₅₀ 14.3 to 16.6 μm) was dispersed 12 stirred for hours. Thereafter, it was filtered and dried to prepare surface-modified graphene oxide.

In addition, after dissolving 1 ml of 3-aminopropyl triethoxysilane in 100 ml of ethyl cellusolve, 15 g of antimony tin oxide (ATO) nanosol (30 wt%, particle size 53.9 nm, in ethyl cellusolve) was mixed with 2 stirred for hours. Thereafter, the surface-modified ATO was prepared by filtration and drying.

2) Prepolymer Synthesis

[Production Example 1]

Hexamethylene diisocyanate (HDI) 1 mol, toluene diisocyanate (TDI) 0.25 mol, primary polyetheramine (PEA1, weight average molecular weight 2,000 g / mol) 0.93 mol and polyhexamethylene carbonate diol (PHCD, weight average molecular weight 2,000) ), after mixing 0.07 mol, reacted at 60° C. for 2 hours and 90° C. for 3 hours, and then cooled to room temperature to prepare a prepolymer.

[Production Example 2]

Hexamethylene diisocyanate (HDI) 0.625 mol, toluene diisocyanate (TDI) 0.625 mol, secondary polyetheramine (PEA2, weight average molecular weight 2,000 g/mol) 0.93 mol and polyhexamethylene carbonate diol (PHCD, weight average molecular weight 2,000) ), after mixing 0.07 mol, reacted at 60° C. for 2 hours and 90° C. for 3 hours, and then cooled to room temperature to prepare a prepolymer.

[Production Example 3]

Hexamethylene diisocyanate (HDI) 0.25 mol, toluene diisocyanate (TDI) 1 mol, secondary polyetheramine (PEA2, weight average molecular weight 2,000 g/mol) 0.93 mol and polyhexamethylene carbonate diol (PHCD, weight average molecular weight 2,000) ), after mixing 0.07 mol, reacted at 60° C. for 2 hours and 90° C. for 3 hours, and then cooled to room temperature to prepare a prepolymer.

[Production Example 4]

After mixing 1.25 mol of hexamethylene diisocyanate (HDI) and 1 mol of a second polyetheramine (PEA2, weight average molecular weight 2,000 g/mol), the mixture was reacted at 60° C. for 2 hours and 90° C. for 3 hours, and then cooled to room temperature. A prepolymer was prepared.

[Production Example 5]

After mixing 1.25 mol of toluene diisocyanate (TDI) and 1 mol of a second polyetheramine (PEA2, weight average molecular weight 2,000 g/mol), the mixture was reacted at 60° C. for 2 hours and 90° C. for 3 hours, and then cooled to room temperature to form a prepolymer. was prepared.

[Production Example 6]

After mixing 1 mol of hexamethylene diisocyanate (HDI), 0.25 mol of toluene diisocyanate (TDI) and 1 mol of polyetheramine (PEA2, weight average molecular weight of 2,000 g/mol) at 60°C for 2 hours, at 90°C After reacting for 3 hours, it was cooled to room temperature to prepare a prepolymer.

(number of moles, mol) prepolymer HDI MDI PEA1 PHCD Preparation Example 1 One 0.25 0.93 0.7 Preparation 2 1.2 0.05 0.93 0.7 Preparation 3 0.25 One 0.93 0.7 Preparation 4 1.25 - One - Preparation 5 - 1.25 One - Preparation 6 One 0.25 One -

[Example 1]

After mixing 100 parts by weight of the second agent with respect to 100 parts by weight of the prepolymer prepared in Preparation Example 1, it was applied on a base surface and cured to prepare a polyurea waterproofing film specimen.

The second agent is based on 100 parts by weight of the first polyetheramine (PEA1, weight average molecular weight 2,000 g/mol), 1 part by weight of the surface-modified graphene oxide, 15 parts by weight of the surface-modified ATO, 4,4 1.5 parts by weight of '-methylene-bis(2,6-di-t-butylphenol) (antioxidant) and (2-(3,5-di-t-butyl-4-hydroxyphenyl)-2-n- It was prepared by mixing 2 parts by weight of bisbutylmalonic acid (1,2,2,6,6-pentamethyl-4-piperidyl (ultraviolet stabilizer)).

[Examples 2 to 5]

All processes were carried out in the same manner as in Example 1 except that the amount of surface-modified graphene oxide and heat-shielding particles was changed.

[Examples 6 to 10]

All processes were performed in the same manner as in Example 1 except for using the prepolymers prepared in Preparation Examples 2 to 6, respectively.

[Comparative Examples 1 to 2]

All processes were carried out in the same manner as in Example 1 except that the amount of surface-modified graphene oxide and heat-shielding particles was changed.

[Comparative Example 3]

All processes were carried out in the same manner as in Example 1 except for using non-surface-modified graphene oxide and ATO particles.

First agent (100 parts by weight) Second agent (100 parts by weight) prepolymer polyetheramine graphene oxide heat shielding particles Example 1 Preparation Example 1 100 One 15 Example 2 Preparation Example 1 100 5 15 Example 3 Preparation Example 1 100 10 15 Example 4 Preparation Example 1 100 5 5 Example 5 Preparation Example 1 100 5 30 Example 6 Preparation 2 100 5 15 Example 7 Preparation 3 100 5 15 Example 8 Preparation 4 100 5 15 Example 9 Preparation 5 100 5 15 Example 10 Preparation 6 100 5 15 Comparative Example 1 Preparation Example 1 100 0 15 Comparative Example 2 Preparation Example 1 100 5 0 Comparative Example 3 Preparation Example 1 100 5
(unmodified) 15
(unmodified)

[Characteristic evaluation]

1) Heat shielding properties: The polyurea coating waterproofing material specimen was installed on the floor, and a 100W incandescent lamp was installed at a height of 27 cm. The temperature of each test piece was measured when the incandescent lamp was turned on and the test piece reached 60 °C, and the temperature difference (ΔT) between the test piece and the test piece was shown in Table 3 below.

2) Tensile strength (N/㎟): The tensile strength of the polyurea coating waterproofing material was measured in accordance with KS F 4922: 2007.

3) Adhesive strength (N/㎟): The adhesion strength of the coating film waterproofing material was measured in accordance with KS F 4922: 2007.

4) Yellowing characteristics: For the yellowing characteristics of the polyurea waterproofing material, after exposure for 200 hours in a QUV weatherometer, visually check the degree of discoloration. did

thermal insulation performance
(ΔT, ℃) The tensile strength
(N/㎟) Adhesive strength
(N/㎟) yellowing Example 1 13.2 21 2.5 fitness Example 2 17.6 20 2.9 fitness Example 3 17.8 22 2.3 fitness Example 4 5.7 19 2.8 fitness Example 5 21.3 15 2.1 fitness Example 6 17.7 16 2.5 fitness Example 7 17.3 19 3.2 incongruity Example 8 17.5 12 2.6 fitness Example 9 17.5 20 3.5 incongruity Example 10 17.6 17 2.8 fitness Comparative Example 1 11.4 21 2.4 fitness Comparative Example 2 2.5 20 2.8 fitness Comparative Example 3 10.2 15 2.5 fitness

Examples 1 to 5 of Table 3 showed superior heat shielding performance, tensile strength, and adhesion strength compared to Comparative Examples, and in particular, in Example 2 in which surface-modified graphene oxide and heat shielding particles were included in appropriate amounts, high heat shielding performance It was confirmed that the tensile strength and adhesion were excellent, and there was almost no yellowing phenomenon.

On the other hand, in the case of Comparative Example 1 to which the surface-modified graphene oxide was not added, the heat shielding performance was significantly lower than that of Example 2, and in the case of Comparative Example 2 to which the surface-modified heat shielding particles were not added, the heat shielding performance was insignificant, and the surface modified In the case of Comparative Example 3 using untreated graphene oxide and heat-shielding particles, each particle was not homogeneously dispersed. All were not as good as in Example 2.

On the other hand, in Example 6 Nabi 10 in which the urethane prepolymer was used differently, in Examples 6 and 8, in which too little aromatic isocyanate was added, tensile strength and adhesion strength were somewhat lowered, and in Example 7 and in which too much aromatic isocyanate was added, In the case of 9, there was a problem in which yellowing occurred.

In addition, even in the case of Example 10 in which polyhexamethylene carbonate diol was not added in an appropriate amount, the tensile strength was somewhat decreased.

Although the present invention has been described with reference to specific matters and limited examples as described above, these are only provided to help a more general understanding of the present invention, and the present invention is not limited to the above examples, and the present invention belongs to Various modifications and variations are possible from these descriptions by those of ordinary skill in the art.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and not only the claims to be described later, but also all those with equivalent or equivalent modifications to the claims will be said to belong to the scope of the spirit of the present invention. .

Claims (6)

a first agent comprising an isocyanate group-terminated prepolymer; and
a second agent comprising a first polyetheramine, surface-modified graphene oxide, and surface-modified heat shielding particles;
Polyurea coating waterproofing material manufactured by reacting
The method of claim 1,
The surface-modified graphene oxide and the surface-modified heat shielding particles are surface-modified with an amine group-containing silane compound, polyurea coating waterproofing material.
The method of claim 1,
The isocyanate group-terminated prepolymer is prepared from aliphatic diisocyanate, aromatic diisocyanate, second polyetheramine and polyhexamethylene carbonate diol, polyurea coating waterproofing material.
4. The method of claim 3,
The aliphatic diisocyanate: the molar ratio of the aromatic diisocyanate is 1: 0.1 to 0.5, polyurea coating waterproofing material.
4. The method of claim 3,
The molar ratio of the second polyetheramine: polyhexamethylene carbonate diol is 1: 0.01 to 0.2, polyurea coating waterproofing material.
a) preparing a mixture of a first agent comprising an isocyanate group-terminated prepolymer; and a second agent comprising a first polyetheramine, surface-modified graphene oxide, and surface-modified heat-insulating particles; and
b) curing the mixture after applying the mixture to the substrate;
A method of manufacturing a polyurea coating film waterproofing material comprising a.