KR101169183B1 - Heat isolating coating compounds and the manufacturing methods, heat isolating waterproofing construction method using the heat isolating coating compounds - Google Patents

Abstract

PURPOSE: A heat-isolating top-coating composition is provided not to generate material harmful for workers, to have excellent heat isolation, durability, adhesion, etc, and to have fast drying rate, thereby having excellent constructability. CONSTITUTION: A heat-isolating top-coating composition comprises: a firs composition comprising 20-40 wt% of polymethylmethacrylate resin, 1-10 wt% of polyol, 1-15 wt% of plasticizer, 10-20 wt% of calcium carbonate, 10-20 wt% of heat-blocking pigment, 1-5 wt% of metallic inorganic pigment for heat-blocking, 10-20 wt% of hollow pigment, 0.2-2 wt% of dispersant, 0.2-2 wt% color-separation preventing agent, 0.2-2 wt% of antifoaming agent, and 0.2-2 wt% of leveling agent, for providing heat-isolation; a second composition comprising 70-85 wt% of polyol, 0.1-1 wt% of 1,3-butylene glycol, 14-24 wt% of isocyanate, and 0.5-6 wt% of xylene; and a benzoyl peroxide as a hardener.

Description

Heat isolating coating compounds and the manufacturing methods, heat isolating waterproofing construction method using the heat isolating coating compounds}

The present invention relates to a heat shield top coating composition, a method of manufacturing the same, and a heat shielding waterproofing method using the heat shield top coating composition. The present invention relates to a polymethyl methacrylate (MMA) resin and a curing agent (BPO), which are environmentally friendly materials. It provides a coating layer, heat shielding pigments, metallic inorganic pigments for heat dissipation, and hollow pigments for high-efficiency heat shielding effect by blocking solar reflection, radiation, and heat energy. It relates to a heat shield top composition comprising the same, a method for producing the same, and a heat shielding waterproofing method using the same.

In general, it is the roof or roof surface temperature that increases the internal temperature of the building in summer.

The summer solar energy in Korea reaches 5,900kcal / ㎡, and the roof or roof surface of the building is accepted as it is, causing the problem of cooling load due to the increase of indoor temperature.

However, the majority of Korean buildings have only a waterproof construction to prevent leakage on the roof or roof, and the waterproof layer has a structural problem that can not solve the heat shielding problem because there is only a waterproof function, but there is little thermal insulation effect.

In order to solve this problem, a research on heat shielding paint applied to the upper part of the waterproofing material constructed in buildings has been conducted.

Specifically, looking for a technology related to conventional heat shielding paints, Republic of Korea Patent Publication No. 10-2011-0006772 (name: heat shield coating composition), Republic of Korea Patent Registration 10-0918085 (name: high functional waterproof coating composition having heat shielding and thermal insulation performance And a method for constructing a heat insulating and heat shield structure for a building using the same).

Looking at the heat shield structure of the Republic of Korea Patent Publication No. 10-2011-0006772, a heat shield coating composition comprising at least one heat shield material selected from the group consisting of pearl, mica and polymethyl methacrylate (PMMA), acrylic resin 10 to 96 A heat shield coating composition comprising 1 part by weight, 1 to 5 parts by weight of a curing agent, 1 to 5 parts by weight of a pigment, 1 to 40 parts by weight of a heat shielding material, and 1 to 40 parts by weight of a diluent is disclosed.

In addition, looking at the heat shield structure of the Republic of Korea Patent Registration No. 10-0918085, 15 to 46 parts by weight of acrylic emulsion resin or styrene-butadiene copolymer emulsion resin, 20-40 parts by weight of powder mica, aluminosilicate (alumino) silicate) 5 to 20 parts by weight, 15 to 35 parts by weight of calcium carbonate, 5 to 10 parts by weight of talc and 2 to 7 parts by weight of titanium dioxide (TiO 2), 4 to 15 parts by weight of heat shield pigment, 0.1 to 1 parts by weight of antisettling agent, Applying a waterproof paint comprising 0.1 to 1 part by weight of a dispersant, 0.1 to 1 part by weight of antifoam, 0.1 to 1 part by weight of texanol, 0.1 to 1 part by weight of preservative, 0.1 to 1 part by weight of thickener and 10 to 40 parts by weight of water. A heat shield layer structure is disclosed.

However, the conventional heat shielding paint technology including the heat shielding technology as described above has a structural problem in that it is not a direct heat shielding structure because it is a method of blocking heat energy absorbed mainly by increasing the solar reflectance mainly with white acrylic paint. In other words, acrylic thermal barrier paint is an environmentally friendly product, but has a high possibility of contamination due to the bright color, poor adhesion and waterproofing of asphalt-based, urethane-based, and does not have excellent durability.

For the same reason, it is necessary to study the composition which can block the rise of the internal temperature of the building and not the thermal energy due to the simple solar reflection, thereby increasing the internal temperature of the building, and excellent durability, waterproofness and applicable to various materials.

An object of the present invention for solving the above problems is a heat shield top composition and a method of manufacturing the same, which is applied during the waterproof construction on the roof or roof of the building to exhibit an effective direct heat shielding effect in the manner of solar reflection, absorption heat radiation and thermal insulation, It is to provide a heat shield waterproof construction method using a heat shield top composition.

The present invention to achieve the object as described above and to perform the problem for eliminating the conventional defects 20 to 40 wt% polymethyl methacrylate resin, 1 to 10 wt% polyol, 1 to 15 wt% plasticizer, calcium carbonate 10 to 20 wt%, heat shield pigment 10 to 20 wt%, metallic inorganic pigment for heat dissipation 1 to 5 wt%, hollow pigment 10 to 20 wt%, dispersant 0.2 to 2 wt%, color separation inhibitor 0.2 to 2 wt%, A first composition composed of an antifoaming agent of 0.2 to 2 wt% and a leveling agent of 0.2 to 2 wt% to provide thermal insulation;

A second composition composed of 70 to 85 wt% of polyol, 0.1 to 1 wt% of 1,3-butylene glycol, 14 to 24 wt% of isocyanate, and 0.5 to 6 wt% of xylene (XYLENE) to enhance adhesion; And

It is achieved by providing a heat shield top composition comprising a benzoyl peroxide (BPO) as a curing agent.

In a preferred embodiment of the present invention, the polymethyl methacrylate resin is 20 to 50 wt% of methyl methacrylate, 10 to 30 wt% of n-butyl acrylate, 5 to 25 wt% of 2-ethylhexyl methacrylate, Methaacrylate-based polymer may be composed of 20 to 50 wt%, additives 0.1 to 5 wt%.

In a preferred embodiment of the present invention, the second composition is a urethane prepolymer having an isocyanate residual ratio of 5 wt%, and may have a weight average molecular weight of 3,000 to 100,000.

According to a preferred embodiment of the present invention, the molar ratio of the hydroxyl group of the polyol in the first composition and the isocyanate group of the urethane prepolymer in the second composition may be 1.3: 1.0 to 1.0: 1.0.

According to a preferred embodiment of the present invention, the benzoyl peroxide, which is the curing agent, may be included in an amount of 2 to 5 parts by weight based on 100 parts by weight of the mixture of the first composition and the second composition.

In a preferred embodiment, the thermal barrier composition is characterized in that the total solar reflectance is 55% or more using a UV Visible spectro photometer (spectrometer, Jasco V-670, wavelength 250 ~ 2500nm).

In a preferred embodiment of the present invention, the heat shield pigment may be a white or colored pigment pretreated with a compound of zirconium and aluminum.

The present invention is a preferred embodiment, the metallic inorganic pigment for the heat dissipation is titanium oxide, zinc oxide, indium oxide, tin oxide, antimony tin oxide (Antimony Tin Oxide), indium tin oxide (Modium), molybdenum oxide (MoO ₃ ), selected from the group consisting of tantalum oxide (Ta ₂ O ₅ ), vanadium pentoxide (V ₂ O ₅ ), niobium oxide (Nb ₂ O ₅ ), boron nitronite (BN), aluminum oxide (AL ₂ O ₃ ) It may be composed of at least one.

In a preferred embodiment of the present invention, the metallic inorganic pigment for heat dissipation may be used having a particle size of 50 ~ 600nm.

In a preferred embodiment of the present invention, the hollow pigment reflects more than 90% of the wavelength range from 300 to 2,500 nm, which is a near infrared wavelength region, and forms a ceramic bubble in the coating film after drying to absorb and dissipate thermal energy, thereby blocking conduction of thermal energy. It may be a bubble.

In a preferred embodiment of the present invention, the dispersant may be a 81 wt% dispersant of the alkylol ammonium salt of the copolymer having an acidic group.

In a preferred embodiment of the present invention, the color separation inhibitor may be a 50 wt% color separation inhibitor of the low molecular weight unsaturated polycarboxylic acid polymer solution.

In a preferred embodiment of the present invention, the defoamer may be 98 wt% defoamer of polymethylalkylsiloxane.

In a preferred embodiment of the present invention, the leveling agent may be 98 wt% leveling agent of the aralkyl-modified polymethylalkylsiloxane.

In another aspect, the present invention,

a) 1 to 10 wt% of polyol, 1 to 15 wt% of plasticizer, 10 to 20 wt% of heat shield pigment, 10 to 20 wt% of calcium carbonate, metallic inorganic pigment for heat dissipation 1 to 5 wt%, 0.2 to 2 wt% dispersant, 0.2 to 2 wt% color separation inhibitor were added to the stirrer and dispersed for 1 to 2 hours at a speed of 500 to 1,000 rpm, followed by 10 to 20 wt% hollow pigment, Preparing a first composition by adding 0.2 to 2 wt% of an antifoaming agent and 0.2 to 2 wt% of a leveling agent and homogenizing the mixture for 20 to 30 minutes at a speed of 300 to 500 rpm;

b) 70 ~ 85 wt% of polyol, 0.1 ~ 1 wt% of 1,3-butylene glycol was added, using a Karl Fischer moisture meter to confirm that the moisture is 0.01 ~ 0.05%, nitrogen gas, and then isocyanate 14 ˜24 wt% was added, heated to 90 ° C., stirred and maintained for 3 hours, 0.5 to 6 wt% of solvent xylene (XYLENE) was added to adjust the viscosity, and then the isocyanate group was measured. terminating the reaction when the wt% is reached to obtain a second composition which is a urethane prepolymer;

c) then mixing the second composition in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the first composition;

d) thereafter adding 2 to 5 parts by weight of a curing agent benzoyl peroxide (BPO) based on 100 parts by weight of the total mixture of the first composition and the second composition; It is achieved by providing a method for producing a heat shield top composition, characterized in that consisting of.

The present invention is a preferred embodiment, the polymethyl methacrylate resin, methyl methacrylate 20 to 50 wt% based on 100 wt% of polymethyl methacrylate resin while gradually increasing the temperature of the reactor to 65 ℃, n 10-30 wt% of butyl acrylate and 2-25 wt% of 2-ethylhexyl methacrylate were added to the reactor, and maintained at 65 ° C. , followed by 20-50 wt% of methacrylate-based polymer. After stirring and dissolving, after dissolving, the additive is added in an amount of 0.1 to 5 wt%, stirred for 2 to 3 hours at a speed of 500 to 1,000 rpm, and cooled to room temperature (20 ° C.).

In a preferred embodiment of the present invention, the heat shield pigment may be a white or colored pigment pretreated with a compound of zirconium and aluminum.

In a preferred embodiment of the present invention, the metallic inorganic pigment for heat dissipation has a particle size of 50 ~ 600nm titanium oxide, zinc oxide, indium oxide, tin oxide, antimony tin oxide (Intimony Tin Oxide), indium tin oxide (Indium Tin oxide) Oxide), molybdenum oxide (MoO ₃ ), tantalum oxide (Ta ₂ O ₅ ), vanadium pentoxide (V ₂ O ₅ ), niobium oxide (Nb ₂ O ₅ ), boron nitronite (BN), aluminum oxide (AL ₂ O _It may be composed of at least one selected from the group consisting of ₃ ).

In a preferred embodiment of the present invention, the hollow pigment reflects more than 90% of the wavelength range from 300 to 2,500 nm, which is a near infrared wavelength region, and forms a ceramic bubble in the coating film after drying to absorb and dissipate thermal energy, thereby blocking conduction of thermal energy. It may be a bubble.

In another aspect, the present invention,

A ground-cleaning step of removing foreign matters on the surface of an object requiring an energy-saving heat-shielding and waterproofing system that prevents heat rise inside the building by blocking solar heat on a roof or roof of a building structure, and repairing a part requiring cracks and reinforcement;

After the primer is applied to the surface of the subject to apply the primer for the reinforcement and adhesion performance of the base surface using a roller or a spray;

After the waterproof layer construction step of constructing a waterproof layer to give a waterproof performance on the primer layer;

Thereafter, a heat shield top coating step of applying the heat shield top composition on the waterproof layer using a roller or a spray; is achieved by providing a heat shield waterproof construction method using a heat shield waterproof composition comprising: a.

The present invention is a preferred embodiment, the primer may be any one selected from urethane primer, asphalt primer, epoxy primer, water-soluble epoxy primer, aqueous acrylic primer.

The present invention is a preferred embodiment, the waterproof layer is a urethane rubber-based waterproof film, acrylic rubber-based waterproof film, cement-based waterproof film, rubberized asphalt waterproof film, asphalt roofing, asphalt felt, improved asphalt sheet, synthetic rubber sheet, modified rubber sheet, It may be any one selected from a vinyl chloride sheet, TPO (Thermoplastic Poly-olefin) sheet.

The present invention as described above is a heat shield top composition having a waterproof performance that can be applied to an existing waterproof layer or a new waterproof system, the heat shield top composition is a solvent-free composition does not generate harmful substances to the operator during construction, heat shielding, durability and It is excellent in physical properties such as adhesion, and has a merit of being excellent in workability due to its fast drying speed.

In addition, by the installation of such a heat shield top composition effectively reflects the solar heat, by radiating the heat of absorption can effectively block the heat conduction can reduce the energy load by cooling in summer,

In addition, it can be attached to the waterproof layer of various materials, so it can be installed without being affected by material characteristics, and it can be carried out quickly with a fast curing time. Since it is a solvent-free type, there is no risk of harm to workers and the natural environment. and,

In addition, the dense coating structure of the heat insulating top composition of the present invention, which is an adhesive composition, is a useful invention having the advantage of being able to serve as a primary waterproofing function and role due to its excellent durability, and is an invention that is highly expected to be used industrially.

1 is a flow chart of manufacturing a heat shield top composition according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The present invention relates to a heat shield top coating composition, a method for manufacturing the same, and a waterproofing method using the heat shield top coating composition. The heat shield top composition includes a first composition that provides heat shielding performance, a second composition that enhances adhesion, and a curing agent.

The first composition comprises a polymethyl methacrylate resin, a polyol and a heat shield pigment, a metallic inorganic pigment for heat dissipation, a hollow pigment and at least one filler and at least one additive, wherein the second composition is a urethane prepolymer including an isocyanate Wherein the curing agent consists of benzoyl peroxide (BPO).

The remaining isocyanates of the polyol of the first composition and the urethane prepolymer of the second composition form crosslinks with the binder component of the waterproof layer dissolved by the polymethylmethacrylate resin of the first composition during the reaction with each other to enhance adhesion. .

The urethane prepolymer may be one having an isocyanate residual ratio of about 1 to 10 wt%, and more preferably, a urethane prepolymer having an isocyanate residual ratio of about 5 wt%. Such isocyanate group residual ratio is a value measured by ASTMD-2572. The weight average molecular weight of the urethane prepolymer may be about 3,000 to 100,000.

The composition ratio between the first composition and the second composition may be used by mixing 0.1 to 10 parts by weight of the second composition based on 100 parts by weight of the first composition, and when the amount thereof is less than 0.1 parts by weight, sufficient crosslinking may not be achieved, resulting in poor adhesion. If used in excess of 10 parts by weight, the pot life is shortened, bubbles or gas may be generated to reduce workability.

In the first composition, the molar ratio of the hydroxyl group of the polyol and the isocyanate group of the urethane prepolymer in the second composition is preferably about 1.3: 1.0 to 1.0: 1.0, and since the excess isocyanate group generates an addition reaction with moisture, It may lower the physical properties. If the molar ratio is 1.0: 1.0 or less, the reaction may not be completed completely, and the physical properties may be lowered. If the molar ratio is 1.3: 1.0 or more, the physical properties of the adhesive layer may be reduced due to the addition reaction.

The curing agent benzoyl peroxide (BPO) can be used in the range of 2 to 5 parts by weight based on 100 parts by weight of the total mixture of the first composition and the second composition, the main composition is not cured sufficiently if the amount is less than 2 parts by weight. If it is used in excess of 5 parts by weight, the pot life may be too short, which may reduce workability.

The filler of the first composition may include at least one selected from the group consisting of calcium carbonate, talc, barium sulfate, and silica, and the additive may be a group consisting of a dispersant, a thickener, a leveling agent, an antifoaming agent, a color separation inhibitor, and a catalyst. It may include at least one selected from.

Hereinafter, the first composition and the second composition will be described.

First, the first composition is 20 to 40 wt% polymethyl methacrylate resin, 1 to 10 wt% polyol, 1 to 15 wt% plasticizer, 10 to 20 wt% calcium carbonate, 10 to 20 wt% heat shield pigment, heat dissipation Metallic inorganic pigment for 1 ~ 5 wt%, hollow pigment 10 ~ 20 wt%, dispersant 0.2 ~ 2 wt%, color separation inhibitor 0.2 ~ 2 wt%, antifoaming agent 0.2 ~ 2 wt%, leveling agent 0.2 ~ 2 wt% do.

The polymethyl methacrylate resin in the first composition may be used in place of any one of polyurethane, epoxy, acrylic, nitrocellulose, alkyd, and polyurea resin in some cases.

The polymethyl methacrylate resin included in the first composition forms a crosslink by a radical initiation reaction with benzoyl peroxide, which is a curing agent, and thus does not react with external functional groups, thereby having excellent water resistance, alkali resistance, salt resistance and waterproof performance. It can be obtained, the volume solid content is close to 100% to form a thick coating film in one application, there is no harmful gas or residual material during the reaction, and completely hardened within 1 hour after construction to exhibit mechanical strength Therefore, the construction is less restricted.

In addition, polymethyl methacrylate resin is harmless to human body so that it can be used in various materials such as contact lenses, joint bones and artificial teeth in the human body. It is characterized by easy coating film formation.

The polymethyl methacrylate resin is preferably used 20 to 40 wt% based on 100 wt% of the first composition, if the use is less than 20 wt% due to the high viscosity, the workability is lowered, 40 wt% or more In this case, the viscosity is low, there is a disadvantage that the coating film thickness is not formed uniformly.

Such polymethyl methacrylate resin is 20 to 50 wt% of methyl methacrylate, 10 to 30 wt% of n-butyl acrylate, 5 to 25 wt% of 2-ethylhexyl methacrylate, and 20 to 50 methacrylate polymer. wt%, additives 0.1-5 wt%.

The methyl methacrylate is to be used in the range of 20 to 50 wt% based on the polymethyl methacrylate resin. If the amount thereof is less than 20 wt%, the viscosity is high, so the workability is not easy. If the amount thereof is more than 50 wt%, the viscosity is low and flows down.

The n-butyl acrylate is to be used in the range of 10 to 30 wt% based on the polymethyl methacrylate resin. If the amount is less than 10 wt%, the viscosity of the composition to be prepared is not easy to workability, and if the amount is more than 30 wt%, it is not easy to construct because of high viscosity.

The 2-ethylhexyl methacrylate is to be used in the range of 5 to 25 wt% based on the polymethyl methacrylate resin. If the amount thereof is less than 5 wt%, the viscosity of the composition to be prepared is lowered in workability. If the amount thereof is more than 25 wt%, the workability is increased by increasing the viscosity.

The methacrylate polymer is preferably used in the range of 20 to 50 wt% based on the polymethyl methacrylate resin. If the amount thereof is less than 20 wt%, the viscosity decreases, so that the workability is not easy. If the amount thereof is more than 50 wt%, the viscosity is increased, and thus the construction is not easy.

The methacrylate polymer may have a weight average molecular weight of 5,000 to 120,000 g / mol and a glass transition temperature (Tg) of 10 to 80 ° C.

The additive may be an additive mixed with one or two or more usable in the field selected from acid value regulators, polymerization initiators, waxes, polymerization inhibitors, crosslinkable monomers as needed. In addition, the additive is in the range of 0.1 to 5 wt% based on the polymethyl methacrylate resin. If the amount thereof is less than 0.1 wt%, it is difficult to secure sufficient physical properties of the adhesive. If the amount thereof is more than 5 wt%, the pot life may be increased, or it may be difficult to secure smoothness, resulting in deterioration of workability.

The polyol constituting the first composition may be used by mixing any one or two or more selected from a polyether polyol, a polyester polyol, a polycacocoractone polyol, a polytetramethylene ether diol, a lower alcohol, and a xylene-modified polyol. The polyol is preferably used in the range of 1 to 10 wt% with respect to 100 wt% of the first composition. If the amount of use is less than 1 wt%, the reactivity may be lowered and the adhesion to the upper waterproof sheet may be lowered. If the amount is used in excess of 10 wt%, the overall physical properties may be degraded.

The plasticizer constituting the first composition is a phthalic ester plasticizer, preferably dioctyl phthalate, and the amount of the plasticizer used is preferably in the range of 1 to 10 wt% with respect to 100 wt% of the first composition. When the amount of the plasticizer used is less than 1 wt%, the viscosity is high and the workability is lowered. When the amount is more than 10 wt%, there is a problem in the flexibility of the cured product.

Calcium carbonate constituting the first composition is preferably used in the range of 10 to 20 wt% with respect to 100 wt% of the first composition. When the amount of the calcium carbonate used is less than 10 wt%, a problem occurs that the formed coating film flows down, and when used in excess of 20 wt%, there is a problem in that the workability is decreased by increasing the viscosity of the composition.

The heat shield pigment contained in the first composition is a white or colored pigment pretreated with a compound of zirconium and aluminum, and has high solar reflectance and long wave reflectance (80% or more of white, 25% or more of black in color), thereby maximizing a heat shielding effect. Has characteristics.

The pretreatment here is carried out with both white and colored pigments. In addition, pretreatment refers to a thin coating of zirconium or aluminum on the pigment.

In addition, it is preferable to use heat shield pigment in the range of 10 to 20 wt% with respect to 100 wt% of the first composition. Such heat shield pigments are TiO ₂ -based white Tipaque CR-99 (Ishihara Co., Ltd.) or carbon black Daipyroxide Black. 90 (Daeil Chemical Co., Ltd.) can be used.

When the amount of the heat shield pigment used is less than 10 wt%, the solar heat reflecting performance is lowered, and when used in excess of 20 wt%, there is a problem in that the workability is decreased by increasing the viscosity of the composition.

The metallic inorganic pigment for heat dissipation included in the first composition is a metal oxide having a particle size of about 50 to 600 nm such as titanium oxide, zinc oxide, indium oxide, tin oxide, antimony tin oxide, and indium tin oxide. (Indium Tin Oxide), molybdenum oxide (MoO ₃ ), tantalum oxide (Ta ₂ O ₅ ), vanadium pentoxide (V ₂ O ₅ ) and niobium oxide (Nb ₂ O ₅ ), boron nitronite (BN) and aluminum oxide ( AL ₂ O ₃ ) It is characterized in that it comprises at least one selected from the group consisting of. The metallic inorganic pigment for heat dissipation is a pigment that heat dissipation is high due to high thermal conductivity.

The metallic inorganic pigment for heat dissipation constituting the first composition is preferably used in the range of 1 to 5 wt% with respect to 100 wt% of the first composition, and the amount of the metallic inorganic pigment for the heat dissipation may be less than 1 wt%. In this case, it is difficult to exhibit a heat dissipation effect, and when used in excess of 5 wt%, a problem occurs in that dispersibility is lowered by increasing the viscosity of the composition.

The hollow pigment contained in the first composition is a hollow glass bubble (manufactured by 3M Co., Ltd.), which reflects a wavelength of 300 ~ 2,500 nm, which is a near infrared wavelength region, by 90% or more, absorbs and dissipates thermal energy by generating ceramic bubbles in the coating film after drying. It has the characteristic of blocking the conduction of thermal energy.

The hollow pigment constituting the first composition is preferably used in the range of 10 to 20 wt% with respect to 100 wt% of the first composition. When the amount of the hollow pigment used is less than 10 wt%, it is difficult to effectively exert the thermal insulation performance. When used in excess of 20 wt%, a large amount of bubbles are formed in the cured coating film, thereby deteriorating the appearance.

The dispersant constituting the first composition is an additive for facilitating the dispersion of the heat shield pigment. In the present invention, a solid content 81 wt% dispersant of an alkylol ammonium salt of a copolymer having an acidic group is used, and the dispersant is 100 wt% of the first composition. It is preferable to use in the range of 0.2 to 2 wt%. When the amount of the dispersant used is less than 0.2 wt%, the dispersing effect of the pigment is lowered. When the dispersant is used at 2 wt% or more, the dispersing effect is increased, but the physical properties of the composition may be reduced.

The color separation inhibitor constituting the first composition is an additive for preventing color separation of the dispersed colored heat shield pigment, and in the present invention, the solid content of the low molecular weight unsaturated polycarboxylic acid polymer solution is 50 wt% color separation inhibitor. The color separation inhibitor is preferably used in the range of 0.2 to 2 wt% with respect to 100 wt% of the first composition. When the amount of the color separation inhibitor used is less than 0.2 wt%, the color separation prevention performance is lowered. When the amount of the color separation agent is used more than 2 wt%, the color separation prevention effect is increased, but the physical properties of the composition may be reduced. have.

The antifoam agent constituting the first composition was used as an additive for removing bubbles generated during the preparation of the composition, and a solid content of polymethylalkylsiloxane was used in an antifoaming agent of 98 wt%. The antifoaming agent was 0.2 to 2 wt% based on 100 wt% of the first composition. It is preferable to use in% range. When the amount of the antifoaming agent is used less than 0.2 wt%, it is difficult to remove the bubbles, thereby deteriorating the physical properties of the composition. When using more than 2 wt%, the effect of removing the bubbles increases but gives a slip property to the surface, which may cause craters on the surface. have.

The leveling agent constituting the first composition is an additive used to form a smooth film, using a solid content 98 wt% leveling agent of the aralkyl-modified polymethylalkylsiloxane, the leveling agent with respect to 100 wt% of the first composition Preference is given to using in the range 0.2 to 2 wt%. When the amount of the leveling agent is added less than 0.2 wt%, it is difficult to form a smooth film. When the leveling agent is added 2 wt% or more, surface cratering may be caused by imparting surface slip property as in the antifoaming agent.

The second composition of the present invention is composed of a urethane prepolymer comprising an isocyanate, wherein the urethane prepolymer is composed of polyether polyols, polyester polyols, polycacocoractone polyols, polytetramethylene ether diols, lower alcohols, and xylene-modified polyols. Single or selected from the group consisting of selected polyols and diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, toluene diisocyanate, hexamethylene diisocyanate biuret, hexamethylene diisocyanate trimer, etc. Two or more types of isocyanates can be mixed and used.

As described above, the urethane prepolymer is preferably composed of 70 to 85 wt% of polyol, 0.1 to 1 wt% of 1,3-butylene glycol, 14 to 24 wt% of isocyanate, and 0.5 to 6 wt% of solvent xylene (XYLENE). Hereinafter, the reason for limitation will be described.

The polyol is preferably used 70 to 85 wt% based on the urethane prepolymer. If the amount of the polyol is less than 70 wt%, it is difficult to form the prepolymer due to the lack of a reactor, and when used in excess of 85 wt%, the excess polyol reactor may affect the overall physical properties.

The 1,3-butylene glycol is preferably used 0.1 to 1 wt% based on the urethane prepolymer. This is because when the amount of the 1,3-butylene glycol used is less than 0.1 wt%, the viscosity increases and workability is lowered.

The isocyanate is preferably used 14 to 24 wt% based on the urethane prepolymer. If the amount of the isocyanate used is less than 14 wt%, the remaining physical properties of the isocyanate groups are insufficient, and if the amount of the isocyanate is used more than 24 wt%, excess residual isocyanate groups are generated to generate an addition reaction to lower the overall physical properties of the adhesive composition. Because there is.

The solvent xylene (XYLENE) is preferably used 0.5 to 6 wt% based on the urethane prepolymer. This is because when the amount of the solvent xylene (XYLENE) is used is less than 0.5 wt%, the viscosity is increased and workability is lowered.

1 is a flow chart of a heat shield top composition according to an embodiment of the present invention, with reference to this will be described below a method of manufacturing a heat shield top composition of the present invention.

(1) polymetal acrylate resin manufacturing step (S100)

Manufacturing method of polymethyl methacrylate resin is based on 100wt% of polymethyl methacrylate resin, methyl methacrylate 20 ~ 50wt%, n-butyl acrylate 10 ~ 30wt%, 2-ethylhexyl methacrylate 5 ~ 25 wt% was added to the reactor and kept warm to 65 ° C.

Next, the methacrylate polymer 20 to 50 wt% was slowly added and slowly stirred to dissolve, and 0.1 to 5 wt% of the additive was added and stirred for 2 to 3 hours at a speed of 500 to 1000 rpm and the temperature of room temperature (20 ° C.). Cooling to complete the polymethyl methacrylate resin production.

Additives used in the above are the base agent and the acid value regulator for adhesion promotion, polymerization initiator for curing agent activity, wax to block the polymerization inhibitory effect by oxygen in the air layer, polymerization inhibitor for improving the storage stability of the composition, crosslinking density of the final cured product A crosslinkable monomer is used to increase the chemical resistance and mechanical strength.

The polymethyl methacrylate resin prepared by the above method is preferably used 20 to 40 wt% based on 100 wt% of the first composition. If the use is less than 20 wt%, the workability is lowered due to the high viscosity, and if it is used more than 40 wt%, the viscosity is low and there is a disadvantage in that the film thickness cannot be formed uniformly.

(2) preparing the first composition (S200)

1 to 10 wt% of polyol, 1 to 15 wt% of a plasticizer, to 20 to 40 wt% of the polymethylmethacrylate resin based on 100 wt% of the first composition using the polymethylmethacrylate resin prepared by the above method, 10 ~ 20 wt% heat shield pigment, 10 ~ 20 wt% calcium carbonate, 1 ~ 5 wt% metallic inorganic pigment for heat dissipation, 0.2 ~ 2 wt% dispersant, 0.2 ~ 2 wt% color separation inhibitor in 500 ~ After dispersing for 1 to 2 hours at a speed of 1,000 rpm, 10 to 20 wt% of hollow pigment, 0.2 to 2 wt% of antifoaming agent and 0.2 to 2 wt% of leveling agent were added to the stirrer and 20 to 30 at a speed of 300 to 500 rpm. The first composition is prepared by homogenizing evenly for a minute.

(3) preparing the second composition (S300)

70 to 85 wt% of polyol and 0.1 to 1 wt% of 1,3-butylene glycol were added, and the water was 0.01 to 0.05% by using a Karl Fischer moisture meter, and nitrogen gas was added thereto. wt% was added, heated to 90 ° C., stirred to maintain the reaction for 3 hours, 0.5 to 6 wt% of solvent xylene (XYLENE) was added to adjust the viscosity, and the residual ratio was 1 to 10 wt% by measuring the isocyanate group. When the reaction is completed, the reaction is terminated to obtain a second composition which is a urethane prepolymer.

(4) mixing the first and second compositions (S400)

Based on 100 parts by weight of the first composition prepared above, the second composition is mixed at 0.1 to 10 parts by weight. If the amount of the second composition is less than 0.1 parts by weight, crosslinking may not be achieved, and thus the adhesion may be reduced with the base surface. When the amount is used in excess of 10 parts by weight, the pot life may be shortened, and bubbles or gas may be generated to reduce workability. Can be.

(5) adding a curing agent to the first and second composition mixture (S500)

A thermal barrier composition is prepared by adding 2 to 5 parts by weight of benzoyl peroxide (BPO), which is a curing agent, based on 100 parts by weight of the total mixture of the first and second compositions. Here, when the amount of benzoyl is less than 2 parts by weight, it may not be completely cured, and when used in excess of 5 parts by weight, the pot life may be too short, thereby reducing workability.

Hereinafter will be described in detail with respect to the heat-resistant waterproof construction method using a heat shield top composition according to an embodiment of the present invention.

Heat shield waterproof construction method according to an embodiment of the present invention primers, waterproof layer, heat shield top composition as a method of constructing an energy-saving heat shield waterproof system that suppresses the temperature rise inside the building by blocking the solar heat on the roof or roof of the building structure Says to build sequentially.

The construction method according to an embodiment is a construction method of providing a urethane primer, a urethane waterproofing layer and the heat shield top composition layer provided by the present invention.

At this time, as another embodiment of the urethane primer, any one selected from asphalt primer, epoxy primer, water-soluble epoxy primer, aqueous acrylic primer can be used.

In addition, as another embodiment of the urethane waterproof layer, acrylic rubber coating waterproofing material, cement coating waterproofing material, rubberized asphalt coating waterproofing material, asphalt roofing, asphalt felt, improved asphalt sheet, synthetic rubber sheet, modified rubber sheet, vinyl chloride sheet, TPO (Thermoplastic) Poly-olefin) sheet may be any one selected from.

As described above, there is no harmful gas when applied to the layer made of the heat insulating top composition according to the present invention, harmless to the human body, and there is almost no restriction in construction, and excellent physical properties such as heat shielding property, heat insulating property, durability, adhesive strength, By using a heat-resistant top coat composition having a fast curing property to construct a waterproof layer on the roof or roof of the building to configure a functional heat shield waterproof layer to reduce the indoor energy load.

Hereinafter is a preferred embodiment of the present invention. However, this embodiment is described through a specific embodiment of the present invention, the present invention is not limited only to the following examples.

(Example 1)

While stirring using a stirrer, a mixed monomer of methyl methacrylate 49.5 wt%, butyl acrylate 14.9 wt% and 2-ethylhexyl methacrylate 5 wt% was added to the reactor while being heated to 65 DEG C, and then the weight average molecular weight. 25 wt% of a methacrylate polymer having a Mw of about 80,000 and a glass transition temperature (Tg) of about 50 ° C. was slowly stirred and dissolved in the mixed monomers. As an additive, 0.5 wt% of paraffin wax, 0.1 wt% of a polymerization inhibitor, 4 wt% of a crosslinkable monomer, 0.5 wt% of a polymerization accelerator, and 0.5 wt% of an acid value regulator were stirred at a speed of 500 to 1000 rpm for 3 hours, and at room temperature (20 ° C). ) To obtain a polymethyl methacrylate resin.

40 wt% of polymethyl methacrylate resin, 4.1 wt% of polyol, 8 wt% of plasticizer, 15 wt% of thermal pigment white pigment and 3 wt% of black pigment, 10.4 wt% of calcium carbonate, metallic inorganic pigment for heat dissipation 2 1 wt% dispersant, 1 wt% dispersant, 1 wt% color separation inhibitor was added, followed by high-speed stirring for 1 hour, followed by 15 wt% hollow pigment, 0.3 wt% antifoaming agent, and 0.2 wt% leveling agent in the ratio of Table 1 Top Composition A first composition was prepared.

In addition, the second composition to be mixed with the first composition comprises 11.4 wt% of a bifunctional polyether polyol having a molecular weight of about 800, 12.6 wt% of a bifunctional polyether polyol having a molecular weight of about 1000, 25.6 wt% of a bifunctional polyether polyol having a molecular weight of 1600, 3 26.6 wt% of a functional polyether polyol and 0.1 wt% of 1,3-butylene glycol were added thereto, and it was confirmed that moisture was about 0.05% or less using a Karl Fischer moisture meter, and nitrogen gas was added thereto.

Next, 17.7 wt% of toluene diisocyanate was added thereto, heated to about 90 ° C., stirred to maintain the reaction for about 3 hours, and 6 wt% of solvent xylene (XYLENE) was added to adjust the viscosity. Thereafter, the reaction was terminated when the isocyanate group was about 5 wt% to obtain a urethane prepolymer.

After the first composition and the second composition prepared above were stirred, 2 parts by weight of the curing agent was mixed with respect to 100 parts by weight of the two compositions in total to prepare an adhesive composition.

(Examples 2 to 4), (Comparative Example 1)

It was prepared in the same manner as in the first composition described in Example 1, except that the amount of each component was changed as shown in Table 1. The second composition and the curing agent used the same product.

In Table 1, the numerical unit of the first composition refers to the wt% of each composition element constituting 100 wt% of the first composition, and the numerical unit of the second composition and the curing agent is each weight part based on 100 parts by weight of the first composition. Say.

In addition, in Table 1, 1) is a methacrylate polymer (DIANAL BR-93, Mitsubishi Rayon Co., Ltd.), 2) is an acid value regulator (ACRYLIC ACID, LG Chemical), 3) is a paraffin wax (Inochem) ), 4) is a polymerization inhibitor (hydroquinone, BORREGAARD),

5) is a crosslinkable monomer (1,4-butylene glycol diacrylate, BASF), 6) is a polymerization accelerator (N, N-dimethyl-p-toluidine, Schemem International) and 7) a heat shield pigment (white) : Tipaque CR-99, Ishihara Co., Ltd., Black: Daipyroxide Black 90, Daeil Chemical Co., Ltd.), 8) Sieving Pigment (Calcium Carbonate, Woojin Chemical), 9) Metallic Inorganic Pigment (Shepherd), 10) Acid Copolymer alkylol ammonium salt-based wet dispersant (BYK-CHEMI) with a group, 11) is a polycarboxylic acid polymer solution (BYK-CHEMI), 12) is a hollow pigment (hollow glass bubble, 3M), 13) Is a polymethylalkylsiloxane additive (BYK-CHEMI), 14) is an aralkyl-modified polymethylalkylsiloxane leveling agent (BYK-CHEMI), and 15) is a urethane prepolymer (Noror Paint Co., Ltd.).

(Performance Evaluation Example 1)

The compositions of Examples 1 to 4 and Comparative Examples, respectively, were coated with a dry coating thickness of 50 μm and naturally dried at room temperature for 7 days, and then the physical properties were measured by the following method, and the results are shown in Table 2.

In addition, Comparative Examples 1 and other components manufactured with a polymethyl methacrylate resin, except heat shield pigments, metallic inorganic pigments for heat dissipation, hollow pigments and Comparative Example 2 (aqueous elastomeric waterproofing material, Noro Paint, After preparing the specimen using the acrylic coating waterproofing material), Comparative Example 3 (DHDC-2740, NORU PAINT, acrylic urethane top coat) and the like, the physical properties of the specimens were measured and compared.

1) Measuring method of glossiness (60 ° glossiness)

According to Test Method 3312 of KS M 5000, the glossiness of the coating film is measured and measured numerically using a 60 ° gloss meter (Tti-Microgloss 20-60-85).

2) Specific method of water resistance

Apply a film applicator on the glass plate (60mm X 140mm X 5mm) so that the dry film thickness is about 50㎛, dries it for 7 days at room temperature for 168 hours, and visually inspects the film for abnormality. .

3) Alkali resistance measuring method

The film is coated on a glass plate (60mm X 140mm X 5mm) with a film applicator to have a dry coating thickness of about 50㎛, then naturally dried at room temperature for 7 days and immersed in a 5% aqueous sodium hydroxide solution for 168 hours, and then there is an abnormality in the coating film. Visually inspect

4) Solvent resistance

Apply a film applicator on the glass plate (60mm X 140mm X 5mm) to have a dry coating thickness of about 50㎛, and then naturally dry at room temperature for 7 days and immerse it in xylene for 168 hours, and then check whether there is any abnormality in the coating. Visually inspect

5) How to measure adhesion

According to the test method of Test Method B of ASTM D3359, the dried coating film was scraped by 6 pieces at intervals of 2cm with each other to make 25 cells, and then bonded to the area with 3M transparent tape. do.

5B: no coating film peeling

4B: less than 5% of coating film peeling

3B: 5 to 15% of peeling of coating film

2B: coating film peeling 16 to 35%

1B: 36 to 65% of film peeling

0B: coating film peeling more than 66%

6) How to measure accelerated weather resistance

According to Test Method 3231 of KS M 5000, the specimens are exposed to the ATLAS Ci5 / DMC Weather-O-Meter for 250 hours and visually inspected for abnormalities in the appearance of the coating.

Referring to Table 2, it can be seen that the specimens prepared using the thermal barrier compositions of Examples 1 to 4 have superior physical properties compared to the specimens prepared using the comparative example.

(Performance Evaluation Example 2: Method of Measuring Heat Resistance)

The compositions of Examples 1 to 4 and Comparative Examples, respectively, were coated with a dry coating thickness of 50 μm and naturally dried at room temperature for 7 days, and then the physical properties were measured by the following method, and the results are shown in Table 3 below.

Using a brush or spray on an EGI sheet (300mm x 300mm x 0.5mm), apply a dry film thickness of about 50㎛, and then naturally dry at room temperature for 7 days to open the roof of the test piece with the material of styrofoam. The roof of the model house (250mm x 250mm x 150mm) is sealed to prevent external air from entering. Irradiate an infrared lamp (Osram, E27 screw base, 250W) for 30 minutes at the top of the test piece for 30 minutes, and measure the roof surface and room temperature by time with digital temperature sensors (OMEGA, Model HH21). Relative thermal insulation performance is measured as the temperature difference. At this time, the heat shield performance measuring device is installed in a closed place.

Referring to Table 3, it can be seen that the roof surface temperature difference and the room temperature difference are larger for 30 minutes when the compositions of Comparative Examples 1 to 3 are used than when the compositions of Examples 1 to 4 are used.

Based on the results, it can be seen that the heat shielding performance of Examples 1 to 4 to which the heat shield pigment of the composition, the metallic inorganic pigment and the hollow pigment for heat dissipation are excellent.

(Performance Evaluation Example 3: Measurement Method of Total Solar Reflectance)

The test conditions were 20 cm x 30 cm in width and length, respectively, and a thickness of 3.0 mm was applied to the glass substrates of Examples 1 to 4 and Comparative Examples 1 to 3 so that the dry film thickness was 50 µm for 7 days at room temperature. After drying, the specimen was measured by using a UV Visible spectro photometer (spectrometer, Jasco V-670, wavelength 250 ~ 2500nm) to measure the total solar reflectance, and the results are shown in Table 4.

Referring to Table 4, it can be seen that the coating film formed by the heat insulating top composition of Examples 1 to 4 has an excellent effect on sunlight reflection with a total solar light reflectance of 50% or more.

(Heatproof waterproof construction method)

Thermal insulation construction method according to an embodiment of the present invention is as follows.

First, clean and smooth the concrete surface to be waterproofed. At this time, the uneven portion is flattened to clean the dirt, dust and sand.

In addition, the waterproof joints such as concrete joints, drains, corners, corners, pipe connections, cracks, and the like may be reinforced by using a nonwoven fabric, an adhesive composition, or a dedicated sealant after constructing a primer having the same composition as the adhesive composition.

After that, the polyurethane primer is applied to the surface of the object with a coating thickness of 50 μm using a roller, spray, or the like as a primer for enhancing the adhesion between the base material and the base surface.

As another example of the primer, any one selected from asphalt primer, epoxy primer, water soluble epoxy primer, and aqueous acrylic primer may be used.

Since the waterproof layer to impart a waterproofing performance on the primer layer, the urethane rubber-based coating waterproofing material is constructed with a thickness of about 0.5 to 3mm from the wall surface to the bottom surface using a hera, a saw trowel, a Laura, and the like.

In addition, as another example of the waterproof layer, acrylic rubber coating waterproofing material, cement coating waterproofing material, rubberized asphalt coating waterproofing material, asphalt roofing, asphalt felt, improved asphalt sheet, synthetic rubber sheet, modified rubber sheet, vinyl chloride sheet, TPO (Thermoplastic Poly- olefin) sheet can be selected and used.

After the waterproofing layer constructed as described above is completely constructed and dried, the heat-resisting topcoat composition is applied on the upper portion of the waterproofing layer to a dry coating thickness of 40 μm using a roller or a spray.

In another embodiment of the present invention, the heat shielding performance of the heat shielding topcoat composition is exhibited by the heat shielding pigment, metallic inorganic pigment for heat dissipation, solar reflection and heat shielding, heat insulation effect of the hollow pigment, polymethyl of the heat shielding topcoat composition The methacrylate resin can be used in place of any one of polyurethane, epoxy, acrylic, nitrocellulose, alkyd and polyurea resins depending on the application.

According to the heat-resistant waterproof construction method according to an embodiment of the present invention, the construction is similar to the existing waterproof construction method, but because the heat-shielding top composition is cured to exhibit a high heat-shielding performance, the energy load due to the temperature rise inside the building It has a great effect on savings.

The present invention configured as described above can be applied to all structures affected by solar energy such as roofs, rooftops, etc. of building structures, and is composed of a waterproof system, thereby providing an excellent heat-resistant waterproof construction method that exhibits waterproof performance.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

Claims (18)

Polymethyl methacrylate resin 20 ~ 40 wt%, polyol 1 ~ 10 wt%, plasticizer 1 ~ 15 wt%, calcium carbonate 10 ~ 20 wt%, heat shield pigment 10 ~ 20 wt%, metallic inorganic pigment for heat dissipation 1 ~ 5 wt%, hollow pigment 10-20 wt%, dispersant 0.2-2 wt%, color separation inhibitor 0.2-2 wt%, defoaming agent 0.2-2 wt%, leveling agent 0.2-2 wt% to provide heat shielding A first composition;
A second composition composed of 70 to 85 wt% of polyol, 0.1 to 1 wt% of 1,3-butylene glycol, 14 to 24 wt% of isocyanate, and 0.5 to 6 wt% of xylene (XYLENE) to enhance adhesion; And
A thermal barrier composition comprising a benzoyl peroxide (BPO) as a curing agent.
The method according to claim 1,
The polymethyl methacrylate resin is 20 to 50 wt% of methyl methacrylate, 10 to 30 wt% of n-butyl acrylate, 5 to 25 wt% of 2-ethylhexyl methacrylate, 20 to 50 methacrylate polymer Heat shield top composition, characterized in that the composition is composed of wt%, 0.1 to 5 wt% additive.
The method according to claim 1,
The second composition is a urethane prepolymer having a residual amount of isocyanate of 5 wt%, and the heat-shielding topcoat composition is characterized in that its weight average molecular weight is 3,000 to 100,000.
The method according to claim 1,
The thermal barrier composition according to claim 1, wherein the molar ratio of the hydroxyl group of the polyol in the first composition and the isocyanate group of the urethane prepolymer in the second composition is 1.3: 1.0 to 1.0: 1.0.
The method according to claim 1,
The benzoyl peroxide, which is the curing agent, based on 100 parts by weight of the mixture of the first composition and the second composition, contains 2 to 5 parts by weight.
The method according to claim 1,
The heat shield top composition is a heat shield top composition, characterized in that the total solar reflectance is 55% or more using a UV Visible spectro photometer (spectrometer, Jasco V-670, wavelength 250 ~ 2500nm).
The method according to claim 1,
The heat shield pigment is a heat shield top composition, characterized in that the white or colored pigments pretreated with a compound of zirconium and aluminum.
The method according to claim 1,
The metallic inorganic pigments for heat dissipation include titanium oxide, zinc oxide, indium oxide, tin oxide, antimony tin oxide, indium tin oxide, molybdenum oxide (MoO ₃ ), and tantalum oxide (Ta _2). O ₅ ), vanadium pentoxide (V ₂ O ₅ ), niobium oxide (Nb ₂ O ₅ ), boron nitronite (BN), aluminum oxide (AL ₂ O ₃ ) At least one selected from the group consisting of Thermal insulation composition, characterized in that.
The method according to claim 8,
The metallic inorganic pigment for heat dissipation heat shield top composition, characterized in that using the particle size of 50 ~ 600nm.
The method according to claim 1,
The hollow pigment is a heat shield top layer which reflects a wavelength of 300 ~ 2,500 nm, which is a near infrared wavelength region, by 90% or more, and blocks the thermal energy conduction by absorbing and dissipating thermal energy by generating ceramic bubbles in the coating film after drying. Composition.
a) 1 to 10 wt% of polyol, 1 to 15 wt% of plasticizer, 10 to 20 wt% of heat shield pigment, 10 to 20 wt% of calcium carbonate, metallic inorganic pigment for heat dissipation 1 to 5 wt%, 0.2 to 2 wt% dispersant, 0.2 to 2 wt% color separation inhibitor were added to the stirrer and dispersed for 1 to 2 hours at a speed of 500 to 1,000 rpm, followed by 10 to 20 wt% hollow pigment, Preparing a first composition by adding 0.2 to 2 wt% of an antifoaming agent and 0.2 to 2 wt% of a leveling agent and homogenizing it for 20 to 30 minutes at a speed of 300 to 500 rpm;
b) 70 ~ 85 wt% of polyol, 0.1 ~ 1 wt% of 1,3-butylene glycol was added, using a Karl Fischer moisture meter to confirm that the moisture is 0.01 ~ 0.05%, nitrogen gas, and then isocyanate 14 ˜24 wt% was added, heated to 90 ° C., stirred and maintained for 3 hours, 0.5 to 6 wt% of solvent xylene (XYLENE) was added to adjust the viscosity, and then the isocyanate group was measured. terminating the reaction when the wt% is reached to obtain a second composition which is a urethane prepolymer;
c) then mixing the second composition in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the first composition;
d) thereafter adding 2 to 5 parts by weight of a curing agent benzoyl peroxide (BPO) based on 100 parts by weight of the total mixture of the first composition and the second composition; Method for producing a heat shield top composition, characterized in that consisting of.
The method of claim 11,
The polymethyl methacrylate resin is 20 to 50 wt% of methyl methacrylate, 10 to 30 wt% of n-butyl acrylate based on 100 wt% of the polymethyl methacrylate resin while gradually increasing the temperature of the reactor to 65 ℃ %, 2-ethylhexyl methacrylate 2 to 25 wt% was added to the reactor, and maintained at 65 ° C., and then 20 to 50 wt% of methacrylate polymer was added and stirred to dissolve, and then dissolved. 0.1 ~ 5 wt% of the additive is stirred for 2 to 3 hours at a speed of 500 ~ 1,000rpm and cooled to room temperature (20 ℃) method for producing a heat shield top composition.
The method of claim 11,
The heat shield pigment is a method of producing a heat shield top composition, characterized in that the white or colored pigments pretreated with a compound of zirconium and aluminum.
The method of claim 11,
Metallic inorganic pigments include particle size of 50 ~ 600nm of titanium oxide, zinc oxide, indium oxide, tin oxide, antimony tin oxide (Antimony Tin Oxide), indium tin oxide for the heat dissipation (Indium Tin Oxide), molybdenum oxide (MoO ₃ ), Tantalum oxide (Ta ₂ O ₅ ), vanadium pentoxide (V ₂ O ₅ ), niobium oxide (Nb ₂ O ₅ ), boron nitronite (BN), at least one selected from the group consisting of aluminum oxide (AL ₂ O ₃ ) Method for producing a heat shield top composition, characterized in that it comprises at least one.
The method of claim 11,
The hollow pigment is a heat shield top layer which reflects a wavelength of 300 ~ 2,500 nm, which is a near infrared wavelength region, by 90% or more, and blocks the thermal energy conduction by absorbing and dissipating thermal energy by generating ceramic bubbles in the coating film after drying. Process for preparing the composition.
A ground-cleaning step of removing foreign matters on the surface of an object requiring an energy-saving heat-shielding and waterproofing system that prevents heat rise inside the building by blocking solar heat on a roof or roof of a building structure, and repairing a part requiring cracks and reinforcement;
After the primer is applied to the surface of the subject to apply the primer for the reinforcement and adhesion performance of the base surface using a roller or a spray;
After the waterproof layer construction step of constructing a waterproof layer to give a waterproof performance on the primer layer;
Then, a heat shield top coating step of applying the heat shield top composition according to any one of claims 1 to 10 on a waterproof layer using a roller or a spray; heat shield waterproof construction method using a heat shield waterproof composition comprising a.
18. The method of claim 16,
The primer is a heat shield waterproof construction method using a heat shield waterproof composition, characterized in that any one selected from urethane primer, asphalt primer, epoxy primer, water-soluble epoxy primer, aqueous acrylic primer.
18. The method of claim 16,
The waterproof layer is urethane rubber coating waterproofing material, acrylic rubber coating waterproofing material, cement coating waterproofing material, rubberized asphalt coating waterproofing material, asphalt roofing, asphalt felt, improved asphalt sheet, synthetic rubber sheet, modified rubber sheet, vinyl chloride sheet, TPO (Thermoplastic Poly) -olefin) Thermal insulation waterproof construction method using a thermal insulation waterproof composition, characterized in that any one selected from the sheet.

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