KR102380339B1 - Heat insulation PMMA paint composition containing BIO Based resin and complex construction method using the same - Google Patents

Abstract

The present invention relates to a heat insulation PMMA paint composition containing BIO-based resin and a composite construction method using the same. The object of the present invention is to provide a paint composition with excellent workability that compensates for the occurrence of cracks in a bottom layer by using BIO-based resin, having an elongation rate similar to that of the bottom layer, and having excellent crack resistance while having continuous heat insulation performance by differentiating a heat insulation pigment, and a composite construction method using the same. The present invention provides a heat insulation PMMA paint composition containing BIO-based resin, composed of 25 to 35% by weight of PMMA resin, 1 to 5% by weight of oligomer resin, 5 to 10% by weight of BIO-based resin, 15 to 25% by weight of a monomer, 5 to 10% by weight of milled glass fiber, 25 to 35% by weight of silica, 8 to 17% by weight of an infrared reflective pigment, and 0.5 to 2% by weight of aniline, and a composite construction method using the same.

Description

Heat insulation PMMA paint composition containing BIO Based resin and complex construction method using the same}

The present invention relates to a heat-shielding PMMA paint composition containing a BIO-based resin and a composite construction method using the same. It relates to a complex construction method.

Recently, solar radiation energy according to environmental changes has been accumulated on the surface of the earth, and the heat island phenomenon is accelerating at night, and during the daytime, the surface temperature is high, making it inconvenient to stay at outdoor multi-use facilities, parks, and bus stops.

To this end, various heat shielding technologies using heat shielding materials that block absorbed thermal energy by increasing various solar reflectances are being disclosed.

However, the conventional heat shielding products had a disadvantage that the effect was insignificant because the reflectance was low and the surface temperature increase rate was low at the beginning, but showed a tendency to increase over time.

In addition, conventional heat shielding products have a disadvantage that cracks easily occur due to a difference in elongation when applied to the bottom layer.

Korea Patent Publication No. 10-1123151 (Registered on Feb. 27, 2012) Korea Patent Publication No. 10-1169183 (Registered on July 20, 2012) Korean Patent Publication No. 10-1754943 (registered on June 30, 2017) Korea Patent Publication No. 10-2052162 (Registered on November 28, 2019)

The purpose of the present invention to solve the above problems is to differentiate the heat-shielding pigment to have continuous heat-shielding performance, and to have an elongation similar to that of the bottom layer using BIO-based resin and to have excellent crack resistance to compensate for the occurrence of cracks in the bottom layer An object of the present invention is to provide a coating composition having excellent workability and a composite construction method using the same.

The present invention, which achieves the above object and performs the task for eliminating the conventional drawbacks, is 25 to 35% by weight of PMMA resin, 1 to 5% by weight of OLIGOMER resin, 5 to 10% by weight of BIO Based resin, and monomer (MONONER) ) 15~25 wt%, MILLED GLASS FIBER 5~10 wt%, SILICA 25~35 wt%, infrared reflective pigment 8~17 wt%, ANILINE 0.5~2 wt% BIO Based resin is included It is achieved by providing a heat-insulating PMMA paint composition.

In a preferred embodiment, the PMMA resin has a weight average molecular weight (MW) of 40,000 to 60,000 and a Tg (glass transition temperature) of 50 to 70° C. It is characterized in that it is used.

In a preferred embodiment, the OLIGOMER resin is a resin comprising at least one of urethane acrylate (URETHANE ACRYLATE) and epoxy acrylate (EPOXY ACRYLATE).

In a preferred embodiment, the urethane acrylate resin uses a resin having at least one of ALIPHATIC URETHANE ACRYLATE and AROMATIC URETHANE ACRYLATE, but the ALIPHATIC URETHANE ACRYLATE resin has 2 to 3 double bonds among cycloaliphatic (CYCLOALIPHATIC) type resins. characterized in use.

In a preferred embodiment, the epoxy acrylate resin is a resin having at least one of BIS PHENOL A TYPE and NOVOLAC TYPE.

In a preferred embodiment, the BIO-based resin includes three or more OH functional groups, and the curing rate is characterized in that it is 1 hour or less.

In a preferred embodiment, the monomer is at least two of MMA (METHYL META ACRYLATE), BMA (BUTYL META ACRYLATE), 2EHA (2-ETHYL HEXYL ACRYLATE), NBAM (N-BUTYL ACRYLATE), iBOA (ISO BORNYL ACRYLATE) characterized by including.

In a preferred embodiment, the monomer is characterized in that it uses a Tg of 20 ~ 40 ℃.

In a preferred embodiment, the MILLED GLASS FIBER is characterized in that it uses a diameter of 0.2mm ~ 0.5mm.

In a preferred embodiment, the SILICA has a particle size of 6-7 MESH, and a hardness of MOHS 7.0 or higher is used.

In a preferred embodiment, the infrared reflective pigment uses a mixture of one or more colored pigments of a white pigment or a black pigment and an auxiliary pigment (EXTENDER PIGMENTS), and in the case of a black pigment, a reflectance of 20% is used, and in the case of a white pigment, a general It is characterized by using a reflectance of 80% or more, not a RUTILE type.

In a preferred embodiment, the auxiliary pigment has an average particle diameter of 0.5 to 1 μm, and is a high-purity BaSO ₄ pigment of 98 wt% or more.

In a preferred embodiment, the ANILINE is a radical polymerization reaction curing accelerator comprising at least one of DIMETHYL PARA TOLUIDINE, DIETHANOL PARA TOLUIDINE, and ETHOXYLATED para-TOLUIDINE.

The present invention in another embodiment,

arranging the surface of the bottom layer to be applied;

thereafter, applying the heat-shielding PMMA paint composition to the bottom layer to form a heat-insulating layer to enhance adhesion performance of the heat-shielding layer and provide heat insulation;

Thereafter, for heat shielding, applying a heat shielding PMMA paint composition to the upper portion of the heat insulating layer to form a heat shielding layer; It is achieved by providing a composite construction method using a heat shielding PMMA paint composition containing a BIO based resin, characterized in that it consists of .

In a preferred embodiment, when the heat insulating layer and the heat shield layer are hardened after application, tensile strength of 3 to 25 N/mm ² , compressive strength of 20 to 25 N/mm, slip resistance coefficient of 60 to 80 BPN wear rate less than 1%, elongation rate 3 to 30%, adhesion performance 0.7 ~ 2.0 N/mm ² Characterized in that it has a physical characteristic.

In a preferred embodiment, forming a primer layer by applying any one of a MMA primer, a urethane primer, and an epoxy primer between the bottom layer and the heat insulating layer to form a primer layer; characterized in that it further comprises.

In a preferred embodiment, the bottom layer is characterized in that the bottom layer is made of any one or more of asphalt concrete (asphalt concrete), concrete, and iron.

The heat-shielding PMMA paint composition containing the BIO-based resin according to the present invention having the above characteristics has excellent adhesion when installed on various floor layers including asphalt concrete (asphalt concrete), concrete, and steel, and has a similar elongation rate to these floor layers It has excellent crack resistance and does not contain organic solvents, so asphalt oil does not elute to the surface of the coating film, so it has the effect that various colors can be applied.

In addition, the heat-shielding PMMA paint composition containing the BIO-based resin according to the present invention can be cured within 1 hour even at ultra-low temperature -30℃ when ANILINE radical polymerization curing accelerator is used, so it can be cured in general parks, parking lots, bicycle roads, automobile roads, refrigeration It has the effect that it can be applied to various fields such as refrigerated warehouses and floors that require high loads.

In addition, the heat-shielding PMMA paint composition containing the BIO-based resin according to the present invention has a higher reflectance of 10% or more than that of the conventional heat-shielding paint using an infrared reflective pigment. It has the effect of improving the durability of the dry coating film because it has strength.

As described above, the present invention is a useful invention having various effects, and its use is greatly expected in industry.

1 is an exemplary view showing a composite construction structure according to an embodiment of the present invention,
2 is a process flow chart showing a composite construction method according to an embodiment of the present invention.

Hereinafter, the configuration and operation of an embodiment of the present invention will be described in detail in connection with the accompanying drawings. Also, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

The heat-shielding PMMA paint composition containing the BIO-based resin according to the present invention is composed of PMMA resin, OLIGOMER resin, BIO-based resin, monomer (MONONER), MILLED GLASS FIBER, SILICA, infrared reflective pigment, and ANILINE.

In particular, the coating composition contains 25 to 35 wt% of PMMA resin, 1 to 5 wt% of OLIGOMER resin, 5 to 10 wt% of BIO based resin, 15 to 25 wt% of monomer (MONONER), and MILLED GLASS FIBER 5 based on the total weight. ˜10 wt %, SILICA 25-35 wt %, infrared reflective pigment 8-17 wt %, ANILINE 0.5-2 wt %.

PMMA (polymethyl methacrylate) resin is composed of 25 to 35% by weight of the total weight of the coating composition of the present invention.

The reason for limiting the value of the PMMA resin composition as described above is that, when the amount of the PMMA resin composition is less than 25% by weight, the total POLYMER resin is insufficient, so coating film formation is not performed well. Also, the dried coating film has low tensile strength and low durability. Since pot life is shortened and workability is deteriorated, when it is added in the above numerical limit, it has excellent tensile strength and elongation and has heat resistance.

In addition, as the PMMA resin, a weight average molecular weight (MW) of 40,000 to 60,000 is used, and a Tg (glass transition temperature or phase change temperature) of 50 to 70°C is used. The reason for this limitation is that when the weight average molecular weight (MW) is less than 40,000, the physical properties of the coating film after curing are too hard to obtain an excellent tensile strength value. Because it has the problem of declining performance.

In addition, the reason for limiting the Tg (glass transition temperature or phase change temperature) value is that when the Tg is less than 50℃, a tacky phenomenon occurs on the surface of the dry coating in summer. because it has problems.

OLIGOMER resin is composed of 1 to 5% by weight of the total weight of the coating composition of the present invention.

The reason for this limitation is that when the OLIGOMER resin is less than 1 wt%, the bonding strength is lowered, and the tensile strength and reactivity are poor, so that the correct coating film properties cannot be obtained. It should be added in the range limited to the above numerical value because the problem of poor adhesion and adhesion occurs.

OLIGOMER resin is composed of a resin containing at least one of urethane acrylate and epoxy acrylate. It has excellent drying speed and abrasion resistance, so it can be painted indoors and outdoors, and has excellent weather resistance such as yellowing resistance. good night.

The urethane acrylate has good wear resistance and weather resistance, and the epoxy acrylate has excellent adhesion.

The urethane acrylate resin is composed of a resin having at least one of ALIPHATIC URETHANE ACRYLATE and AROMATIC URETHANE ACRYLATE, and the epoxy acrylate resin is composed of at least one of BIS PHENOL A TYPE and NOVOLAC TYPE.

The OLIGOMER resin preferably has excellent drying speed and abrasion resistance and has excellent weather resistance among CYCLOALIPHATIC type urethane acrylate (URETHANE ACRYLATE) resins having 2 to 3 double bonds.

The reason for this limitation is that OLIGOMER, which has less than two urethane acrylate double bonds, has a problem of poor abrasion resistance. Therefore, it is better to select OLIGOMER resins with 2-3 double bonds.

The BIO-based resin is composed of 5 to 10 wt% of the total weight of the coating composition of the present invention.

The reason for this limitation is that when less than the suggested 5 wt%, the elongation rate is low and the flexibility against cracks on the bottom surface is lowered. It should be added in the numerically limited range.

BIO-based resins are composed of resins having three or more OH functional groups, and when combined with PMMA resin, there is no layer separation and does not affect transparency. As such, when the number of OH functional groups in the BIO-based resin is less than three, the reactivity is lowered, and the urea reaction and the radical reactivity of the PMMA resin are not in balance, resulting in surface tack. Therefore, it is necessary to select three or more OH functional groups in the BIO-based resin to obtain coating film properties that are cured in 1 hour or less.

For this reason, the BIO-based resin helps to prevent cracks by securing a stable elongation when painting on the asphalt concrete base.

In particular, the BIO-based resin of the present invention is a resin using eco-friendly raw materials made by reforming natural raw materials rather than synthetic raw materials in petrochemicals. It has three or more OH functional groups, and is a BIO MASS-based resin CASTOR OIL, SOVERMOL 40, SOVERMOL. 100, SOVERMOL 750, URIC H81, URIC H420, URIC F40, etc., and includes at least one of them .

The monomer (MONOMER) is composed of 15 to 25% by weight of the total weight of the coating composition of the present invention.

The reason for this limitation is that the coating film properties (tensile strength, elongation, pot life) are affected according to the MONORER content, so when the content is less than 15 wt%, the viscosity and pot life are shortened, so workability is significantly reduced. If it is exceeded, on the contrary, the tensile strength and elongation rate decrease, so it should be added within the range limited to the above numerical values.

Monomer (MONOMER) contains two or more of the monomers consisting of MMA (METHYL ACRYLATE), BMA (BUTYL META ACRLATE), 2EHA (2-EHTYL HEXYL ACRYLATE), NBAM (N BUTYL ACRYLATE), and iBOA (ISO BORNYL ACRYLATE). do. At this time, it is better to select and use two or more monofunctional monomers because they are related to viscosity adjustment and dry coating film Tg.

In addition, when the Tg is high, the solubility is excellent, the viscosity is easy to adjust, and the workability is excellent when applying the heat-shielding paint using the BIO-based resin, but the coating film strength is too high and there is a possibility of cracking, so the average monomer Tg is 20~40℃ use.

MILLED GLASS FIBER is composed of 5 to 10 wt% of the total weight of the coating composition of the present invention.

The reason for this limitation is that when the amount of MILLED GLASS FIBER used is less than 5% by weight, the tensile strength is lowered and there is a possibility of cracking. should be

MILLED GLASS FIBER uses 0.2mm ~ 0.5mm in diameter. The reason for limiting the diameter in this way is that when the diameter is less than 0.2mm, the oil absorption is high, and there is a problem that the wetting property is deteriorated when various substrates other than asphalt concrete (asphalt concrete) are applied to paint. Since there is a problem that the MILLED GLASS FIBER may protrude on the back surface, it should be selected within the limited range of the above numerical value.

MILLED GLASS FIBER has excellent tensile strength, and it is combined and integrated with PMMA resin, so it has excellent heat resistance and cold resistance. give.

In particular, MILLED GLASS FIBER has excellent tensile strength and low thermal conductivity, which helps it to act as an insulating effect. Conventional ceramic-based hollow tools have low durability and damage due to impact. However, MILLED GLASS FIBER compensates for these shortcomings.

SILICA is composed of 25 to 35% by weight of the total weight of the coating composition of the present invention.

The reason for this limitation is that when the amount used is less than 25% by weight, the compressive strength is lowered, which affects durability.

When formulated in this way, the strength of the coating film is improved, and it helps to improve the durability of the coating film according to the movement of the vehicle.

For SILICA, use those with a MOHS hardness of 7 or more and a particle size of 6 to 7 MESH. The reason for limiting the numerical value in this way is that when the MOHS hardness is less than 7, compressive strength and abrasion resistance deteriorate, so it is better to select a MOHS 7 or higher. good night.

In addition, the reason for limiting the SILICA particle size is that when the SILICA particle size is less than 6 MESH, the SILICA oil absorption increases and the paint viscosity increases, resulting in poor workability. Since sufficient film strength cannot be expressed, it must be used within the above-limited range.

In the case of artificial or hollow silica, there is a problem that the strength is lowered, so it is better to use SILICA with excellent strength, such as natural silica (river silica) or Australian sand (濠洲産 silica).

The infrared reflective pigment is composed of 8 to 17% by weight of the total weight of the coating composition of the present invention, and it is recommended to use a mixture of a colored pigment and an auxiliary pigment (EXTENDER PIGMENTS). Do.

The reason for limiting the value of the infrared reflective pigment in this way is that when the amount used is less than 8% by weight, the hiding rate is lowered and the infrared reflectance is lowered. Since it has a problem in that the physical properties of the dry film are poor, it must be added within a limited range.

Infrared reflective pigments use at least one of WHITE or BLACK colors, and they must be used together with the EXTENDER PIGMENTS, barium sulfate.

At this time, the black pigment absorbs solar thermal energy and the surface temperature rises, so infrared reflective pigment black FERRO V-779, FERRO V-778, IR BLACK P-831, IR BLACK P-831, HEUCODURㄾ IR Black 910 When the selected pigment is used, the solar reflectance can have a value of 20% or more.

In addition, in the case of white pigment among infrared reflective pigments, use a non-standard RUTILE type pigment with a reflectance of 80% or more. That is, one of white IR-1000, R-709, or R-700 must be used to have a solar reflectance of 80% or more. can't show any more

When using the infrared reflective pigment selected in this way, the temperature difference with asphalt concrete (asphalt concrete) before application can be shown by more than 10℃.

In particular, as for the infrared reflective auxiliary pigment barium sulfate (BaSO ₄ ), a high purity content of 98 wt% or more is used, and the use of one with an average particle diameter of 1 μm or less is used to have a high reflectance, and on the contrary, the barium sulfate (BaSO ₄ ) content is 98 When the weight % is less than or the average particle diameter is 1㎛ or more, the surface temperature difference before and after painting cannot be expressed more than 10℃.

ANILINE contains 0.5 to 2% by weight of the inventive coating composition. ANILINE is used as a curing catalyst, and when applied at ultra-low temperature -35℃ using this, curing time is within 1 hour. In particular, ANILINE is used as a radical polymerization reaction curing accelerator and urea reaction accelerator, and includes at least one of DIMETHYL PARA TOLUIDINE, DIETHANOL PARA TOLUIDINE, and ETHOXYLATED para-TOLUIDINE.

The coating composition of the present invention having the above composition, when applied and cured, has a tensile strength of 3 to 25 N/mm ² , a compressive strength of 20 to 25 N/mm, a slip resistance coefficient of 60 to 80 BPN Abrasion rate of less than 1%, and an elongation of 3 to 30 %, adhesion performance 0.7 ~ 2.0 N/mm ² It has physical properties.

That is, when the heat-shielding PMMA composition containing the BIO-based resin is used, excellent coating film properties such as tensile strength and elongation can be obtained as described above. have a coefficient of resistance.

In addition, the BIO-based resin and PMMA paint composition have a double curing system, and the reason why they can be cured quickly even at low temperatures is the urea reaction of the BIO-based resin and the PMMA resin and monomer by ANILINE, which acts as a catalyst, as shown in the reaction formula below. It serves to accelerate the radical reaction with the double curing and forms a curing mechanism within 1 hour.

(reaction formula)

For this reason, the coating composition of the present invention having the above physical properties has excellent adhesion during construction, and is applied to floor layers such as general parks, parking lots, bicycle roads, automobile roads, refrigerated and frozen warehouse flooring materials, and flooring materials that require high loads. As it has similar fluidity to that of asphalt concrete (asphalt concrete), concrete, and steel, it prevents cracks and achieves high heat-shielding effect through multi-layer coating.

In addition, since the composition element does not contain organic solvents, when the material constituting the floor layer is asphalt (asphalt concrete), there is no phenomenon of asphalt oil leaching to the surface of the coating film, so various colors can be applied. In particular, ANILINE radical polymerization reaction hardening accelerator It can be cured in 1 hour even at a very low temperature of -30 ° C.

1 is an exemplary view showing a composite construction structure according to an embodiment of the present invention, Figure 2 is a process flow chart showing a composite construction method according to an embodiment of the present invention.

As shown, if you look at the structure constructed according to the construction method using the heat-shielding PMMA paint composition containing the BIO-based resin according to the present invention, the insulation layer (3) and the heat shield layer of the present invention are on the bottom layer (1) below. (3) is sequentially stacked.

The heat insulating layer (3) and the heat shielding layer (3) are the same as PMMA resin 25~35 wt%, OLIGOMER resin 1~5 wt%, BIO Based resin 5~10 wt%, Monomer (MONONER) 15~25 wt%, MILLED GLASS It is a heat-shielding PMMA paint composition containing a BIO-based resin composed of 5 to 10 wt% of FIBER, 25 to 35 wt% of SILICA, and 8 to 17 wt% of infrared reflective pigments.

At this time, it may optionally be formed by further including a primer layer (2) between the bottom layer (1) and the heat insulating layer (3).

The present invention having such a structure is a construction method,

arranging the surface of the bottom layer to be applied;

Thereafter, the heat-shielding PMMA paint composition containing the BIO-based resin is applied to the bottom layer (1, for example, an asphalt floor surface) to enhance the adhesion performance of the heat-shielding layer and form a heat-insulating layer 3 to provide heat insulation;

Thereafter, for heat shielding, a heat shielding PMMA paint composition containing a BIO based resin is applied on the heat insulating layer 3 to form a heat shielding layer 4 .

In this case, the method may further include; applying a primer between the bottom layer 1 and the heat insulating layer 3 to form the primer layer 2 .

When this construction method is completed, it has fluidity similar to that of the floor layer, preventing cracks and obtaining high thermal insulation and heat shielding effects.

The heat insulating layer 3 and the heat shield layer 4 applied as described above have a tensile strength of 3 to 25 N/mm ² , a compressive strength of 20 to 25 N/mm after curing, a coefficient of slip resistance of 60 to 80 BPN, a wear rate of less than 1%, and an elongation rate. It has physical properties of 3~30%, adhesion performance of 0.7~2.0 N/mm ² .

The step of arranging the surface of the bottom layer to be applied is a step of removing and repairing and reinforcing surface foreign substances.

In the step of forming the heat insulating layer 3, a heat-shielding PMMA paint composition containing a BIO-based resin is applied using a spray, roller, or a saw-toothed mill.

In the step of forming the first coating film, the thickness of the coating film is suitable to be 1-2 mm, and the application is done once, and the application time must be within 10 minutes.

Since the paint according to the present invention is a fast curing type and the drying time is 1 hour, it can be applied immediately after drying in the step of forming a heat shielding layer.

When the coating thickness is less than 1 mm, drying failure may occur, so a coating film thickness of 1 to 2 mm should be applied at one time of painting. In the step of forming a layer, it should be coated with the indicated thickness of the coating film.

In the step of forming the heat shield layer (4), the heat shielding PMMA paint composition containing the BIO-based resin is applied with a spray, roller, or sawtooth mill to spread the coating film evenly, and then a coating film is formed using a pattern roller, and the final coating film thickness is 1~2mm is suitable, and it is applied once and the application time should be within 10 minutes.

The paint of the present invention is a super fast curing type, and since the drying time is 1 hour, the heat shielding layer can be formed immediately after the heat insulating layer is dried. If the coating thickness is less than 1 mm, drying failure may occur, so a coating thickness of 1 to 2 mm should be applied with one coating. ), it should be coated with the indicated thickness of the coating film.

The curing time in all of the above steps must be cured within 1 hour to have excellent properties of the coating film, so the amount of curing agent used according to the temperature must be observed.

The primer used in the step of forming the primer layer 2 may be one or more selected from an MMA primer, a urethane primer, and an epoxy primer.

Hereinafter are preferred embodiments of the present invention.

The following examples show preferred examples to help the understanding of the present invention, but these examples only illustrate the present invention and the scope of the present invention is not limited to the following examples.

(Examples 1-3)

(Table 1)

result

The graph describes the graph change according to the data values of the test results of Examples 1, 2, and 3, in which the tensile strength physical property evaluation test was performed using the paint composition prepared with the composition of Table 1 according to the KS M ISO 527-1 test method It is also

According to the change in the composition ratio of OLIGOMER in the coating composition prepared as shown in Table 1, the coating film was formed differently. The dry film thickness was 2000㎛, dried naturally at room temperature for 1 hour, and then dried by heating at 60℃ OVEN for 1 hour. I was able to check the results.

Therefore, in the prepared coating composition, the amount of OLIGOMER used is 1 to 5% by weight to obtain a data value that meets the standard.

(Examples 4-6)

(Table 2)

result

The graph is an explanatory diagram of the graph change according to the data values of the test results of Examples 4,5,6 in which the elongation property evaluation test was performed using the paint composition prepared with the composition of Table 2 according to the KS M ISO 527-1 test method am.

According to the change in the composition ratio of the BIO BASED resin in the coating composition prepared as shown in Table 2, the coating film was formed differently. The dry film thickness was 2000㎛, and the result of measuring elongation after drying naturally at room temperature for 1 hour and then heating and drying in OVEN at 60°C for 1 hour, all of Examples 4, 5, and 6 were able to obtain excellent physical property results.

(Examples 7-9)

(Table 3)

result

In the coating composition prepared as shown in Table 3, the composition ratio of the infrared reflective pigment was changed to 8 to 17% by weight to change the coating film formation. After drying at room temperature for 1 hour, when measuring the surface reflectance of the coating film with a reflectance measuring device, all of Examples 7, 8, and 9 showed good reflectance data values higher than the standard.

Next, the comparative data of physical properties after applying the composition according to the above Examples and Comparative Examples to the bottom layer are as follows.

The following is a comparative example to be compared with the present invention.

(Comparative Examples 1,2)

(Table 4)

result

Among the coating compositions prepared with the same composition as in Example 5 and Comparative Examples 1 and 2 of Table 4, the composition ratio of the BIO BASED resin was changed to form a different coating film. The dry coating film thickness was 2000㎛, and after drying naturally at room temperature for 1 hour and then heating and drying at 60 ℃ OVEN for 1 hour, the elongation was measured. In Example 5, excellent results satisfying the criteria were obtained. In the case of Example 1 and Comparative Example 2, the result value is less than the standard.

Accordingly, it can be confirmed that, in the prepared paint composition, when the composition ratio of the BIO-BASED resin is deviated from the standard, the physical property data falls below the reference value.

(Comparative Examples 3,4)

(Table 5)

result

Among the coating compositions prepared with the same composition as in Example 8 and Comparative Examples 3 and 4 of Table 5, the composition ratio of the infrared reflective pigment was changed to form a different coating film. After natural drying at room temperature for 1 hour, when measuring the surface reflectance of the coating film with a reflectance measuring device, a reflectance value lower than the standard was obtained in Comparative Examples 3 and 4, except for the reflectance value of Example 8.

Therefore, it can be confirmed that, in the prepared coating composition, when the infrared reflective pigment composition ratio is deviating from the standard, the physical property data falls below the reference value.

The present invention is not limited to the specific preferred embodiments described above, and various modifications are possible by anyone with ordinary skill in the art to which the invention pertains without departing from the gist of the invention as claimed in the claims. Of course, such modifications are intended to be within the scope of the claims.

(1): bottom layer (2): primer layer
(3): heat insulation layer (4): heat shield layer

Claims (17)

PMMA resin 25~35 wt%, OLIGOMER resin 1~5 wt%, BIO Based resin 5~10 wt%, Monomer (MONONER) 15~25 wt%, MILLED GLASS FIBER 5~10 wt%, SILICA 25~35 wt% , 8 to 17 wt% of infrared reflective pigment, 0.5 to 2 wt% of ANILINE,
The OLIGOMER resin is a resin comprising at least one of urethane acrylate (URETHANE ACRYLATE) and epoxy acrylate (EPOXY ACRYLATE),
The BIO Based resin contains three or more OH functional groups, and the curing rate is within 1 hour,
The monomer is characterized in that it comprises two or more of MMA (METHYL META ACRYLATE), BMA (BUTYL META ACRYLATE), 2EHA (2-ETHYL HEXYL ACRYLATE), NBAM (N-BUTYL ACRYLATE), iBOA (ISO BORNYL ACRYLATE) A heat-shielding PMMA paint composition containing a BIO-based resin.
The method according to claim 1,
The PMMA resin has a weight average molecular weight (MW) of 40,000 to 60,000 and a Tg (glass transition temperature) of 50 to 70° C. A heat-shielding PMMA paint composition containing a BIO based resin, characterized in that it is used.
delete The method according to claim 1,
The urethane acrylate resin uses a resin having at least one of ALIPHATIC URETHANE ACRYLATE and AROMATIC URETHANE ACRYLATE, but the ALIPHATIC URETHANE ACRYLATE resin is an alicyclic (CYCLOALIPHATIC) type resin having 2 to 3 double bonds. A heat-shielding PMMA paint composition containing a BIO-based resin.
The method according to claim 1,
The epoxy acrylate resin is a heat-shielding PMMA paint composition containing a BIO-based resin, characterized in that it is a resin having at least one of BIS PHENOL A TYPE and NOVOLAC TYPE.
delete delete The method according to claim 1,
The monomer is a thermal barrier PMMA paint composition containing a BIO-based resin, characterized in that using a Tg of 20 ~ 40 ℃.
The method according to claim 1,
The MILLED GLASS FIBER is a heat-shielding PMMA paint composition containing a BIO-based resin, characterized in that it uses a diameter of 0.2 mm to 0.5 mm.
The method according to claim 1,
The SILICA has a particle size of 6 to 7 MESH, and a hardness of MOHS 7.0 or higher is used.
The method according to claim 1,
The infrared reflective pigment uses a mixture of one or more colored pigments and EXTENDER PIGMENTS among white pigments or black pigments, and uses 20% reflectance in case of black pigment. Heat-shielding PMMA paint composition containing BIO-based resin, characterized in that 80% or more is used.
12. The method of claim 11,
The auxiliary pigment has an average particle diameter of 0.5 to 1 μm, and is a high-purity BaSO ₄ pigment of 98% by weight or more.
The method according to claim 1,
The ANILINE is a radical polymerization reaction curing accelerator, DIMETHYL PARA TOLUIDINE, DIETHANOL PARA TOLUIDINE, ETHOXYLATED para-TOLUIDINE heat-shielding PMMA paint composition containing a BIO-based resin, characterized in that it contains at least one of.
arranging the surface of the bottom layer to be applied;
Then, the heat-shielding PMMA paint composition containing the BIO-based resin according to any one of claims 1, 2, 4, 5, and 8 to 13 is applied to the bottom layer (1) to enhance the adhesion performance of the heat shield layer. and forming a thermal insulation layer (3) to provide thermal insulation;
Thereafter, for heat shielding, applying a heat shielding PMMA paint composition on the heat insulating layer (3) to form a heat shielding layer (4); Composite construction using a heat shielding PMMA paint composition containing a BIO based resin method.
15. The method of claim 14,
When the heat insulating layer 3 and the heat shield layer 4 are cured after application, tensile strength 3 ~ 25 N/mm ² , compressive strength 20 ~ 25 N/mm, slip resistance coefficient 60 ~ 80 BPN Wear rate less than 1%, elongation rate 3 A composite construction method using a heat-shielding PMMA paint composition containing a BIO-based resin, characterized in that it has physical properties of ~30% and adhesion performance of 0.7 ~ 2.0 N/mm ² .
15. The method of claim 14,
Forming a primer layer (2) by applying any one of a primer selected from an MMA primer, a urethane primer, and an epoxy primer between the bottom layer (1) and the heat insulating layer (3); BIO Based resin comprising further comprising A composite construction method using a heat-shielding PMMA paint composition containing
15. The method of claim 14,
The bottom layer is a composite construction method using a heat-shielding PMMA paint composition containing a BIO-based resin, characterized in that the bottom layer is made of at least one of asphalt concrete (asphalt concrete), concrete, and steel.

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