KR20120006639A

KR20120006639A - Paint composition with excellent heat change and retroreflectivity and the method of painting the pavement by using the said paint composition

Info

Publication number: KR20120006639A
Application number: KR1020100067211A
Authority: KR
Inventors: 이승길; 홍재형
Original assignee: 주식회사 크리오텍
Priority date: 2010-07-13
Filing date: 2010-07-13
Publication date: 2012-01-19

Abstract

PURPOSE: A paint composition and a formation of a coating layer for a packing material using thereof are provided to minimize the heat accumulation inside the packing material, and to secure the excellent recurrent reflection degree of the composition in the rain or the night time. CONSTITUTION: A paint composition contains 10-15wt% of acrylic emulsion resin or styrene-butadiene copolymer emulsion resin, 5-8wt% of water-soluble polyurethane resin, 4-8wt% of heat-blocking pigment, 15-20wt% of heat-converting particle, 3-6wt% of recurrent-reflector, 3-5wt% of alumino silicate, 1.5-2wt% of dispersing agent, and 20-40wt% of water. The heat-converting particle has the particle diameter of 50-100 microns, and has a sphere shape with the hollow inside. The recurrent-reflector is formed with a core glass bead(10), a first thermosetting adhesive layer(20), a first spheric shell bead(30), a sceond thermosetting adhesive layer(40), a second spheric shell bead(50), and a protective coating agent(60).

Description

Paint composition with excellent heat change and retroreflectivity and the method of painting the pavement by using the said paint composition}

The present invention relates to a paint composition having excellent heat conversion characteristics and retroreflective properties, and a method for forming a coating film of a packaging material using the paint composition, and more particularly, in forming a coating film on an elastic pavement, a general road pavement material, and the like. By including a thermal conversion particle having a conversion action and a retroreflector having a retroreflective property, the thermal energy applied from the outside by the thermal conversion particle is converted into kinetic energy to dissipate heat inside the packaging material and at the same time to the retroreflective body. The present invention relates to a coating composition capable of increasing bonding and fixing strength with excellent retroreflective properties, and a method for forming a coating film of a packaging material using such a paint composition.

In general, road pavements made of asphalt or concrete, bicycle pavements, trails, playgrounds, parks, etc., elastic pavement or urethane pavement, and various non-slip pavement are exposed to the outside directly exposed to direct sunlight from the sun.

Therefore, the surface temperature of the packaging material in summer reaches 60 ℃, the long-wavelength radiation that heats the atmosphere or the wall of the surrounding building from the packaging material by the heat storage during the day at night occurs. Usually, the surface temperature of soil is 40 ℃ even though it is the highest, so the high temperature of pavement surface causes urban heat island phenomenon. Such a paving material does not fundamentally block heat accumulation of a road by direct sunlight in the middle of the day, and causes a high temperature phenomenon in which the ambient temperature of the road rises due to radiant heat. Particularly, in the case of an elastic packaging material made of rubber chips, plastic deformation of the rubber chip itself is caused by thermal accumulation, causing problems such as dampness without maintaining a predetermined elasticity. Accumulation reduces the durability of the asphalt, causing problems such as loss or release of aggregates and the like due to external forces.

On the other hand, in general, by forming a lane or caution signs such as a coating composition on the various packaging materials, and visually informed in advance, the paint composition having such a function in the prior art generally includes a retroreflector to perform such a function. However, unlike in the daytime, unlike in the daytime, since the surrounding indirect lighting is small, such a retroreflective property is deteriorated, so that it is difficult for a driver or a user to recognize such a lane or a caution sign, causing a safety accident.

Thus, the present inventors have developed a paint composition for forming a coating film on the packaging material. The coating composition developed by the present invention includes thermal conversion particles to convert thermal energy applied from the outside into kinetic energy, thereby By dissipating heat to minimize thermal accumulation inside the packaging material, and also to include a retroreflective body having excellent retroreflective properties, it is possible to secure excellent retroreflectivity even at night or in rainy weather, thereby greatly improving visibility. It is intended to increase the binding force and adhesion of such retroreflective body during construction.

An object of the present invention is to solve the conventional problems as described above, by minimizing the heat accumulation inside the packaging material by including the heat conversion particles in the paint composition to consume the heat applied from the outside as kinetic energy by the heat conversion particles. As a result, to solve the problem that the packaging material itself is plastic deformation or loss or separation by heat of the conventional packaging material.

In addition, the object of the present invention is to uniformly fix the shell beads on the outer surface of the core glass beads, and to unevenly adhere the shell beads to the outer surface of the shell beads, thereby including a retroreflector having a greatly increased retroreflectivity in the coating composition. In addition, it is possible to secure excellent retroreflectivity even at night or in rainy weather to provide a paint composition that can greatly improve visibility.

In addition, it is an object of the present invention to increase the bonding and fixing force of the shell beads by filling the non-contact voids between the shell beads fixed on the outer surface of the core glass beads with a protective coating in the retroreflective body included in the paint composition, resulting in non-contact. It is to solve the problems of wear resistance and durability deterioration due to voids and the like.

In order to achieve the above object, the present invention, in the coating composition excellent in heat conversion properties and retroreflectivity, acrylic emulsion resin or styrene-butadiene copolymer emulsion resin 10 ~ 15 wt%; Water soluble polyurethane resin 5-8 wt%; Heat shield pigments 4-8 wt%; It has a particle diameter of 50 to 100㎛, the inside is a hollow spherical polymer material, the outside is made of a spherical inorganic material surrounding the polymer material, the polymer material is the kinetic energy of heat energy incident by the thermal conversion motion 15 to 20 wt% of heat conversion particles to prevent wear and deterioration of the coating film while assisting the heat conversion motion; Retroreflector 3-6 wt%; Alumino silicate 3-5 wt%; Dispersant 1.5-2.0 wt%; And 20 to 40 wt% of water, wherein the retroreflective body has a particle diameter of 400 to 800 μm and a spherical core glass bead, which is coated on the outer surface of the core glass bead and has a refractive index (nD) of 2.5 to 3.1. A first thermosetting adhesive layer composed of 45 to 70 wt% of a dioxide light reflector and 30 to 55 wt% of a thermosetting resin, and is uniformly fixed to an outer surface of the first thermosetting adhesive layer by thermal curing, with a refractive index of 1.93 to 2.5, and 40 to 100 First spherical shell bead having a particle diameter, the second thermosetting adhesive is applied to the outer surface of the spherical shell bead, consisting of 45 ~ 70wt% of titanium dioxide light reflector having a refractive index (nD) of 2.5 ~ 3.1 and 30 ~ 55wt% of the thermosetting resin A second spherical shell bead unevenly adhered to the outer surface of the second thermosetting adhesive layer by a layer and thermosetting, having a refractive index of 1.93 to 2.5, and having a particle size of 40 to 100 μm, and a void between the second spherical shell beads Refilled in That consisting of a protective coating to increase the bonding force of the bead-shaped shell characterized.

Preferably, the retroreflective material, after mixing and stirring 45 to 70 wt% of a titanium dioxide light reflector having a refractive index (nD) of 2.5 to 3.1 and 30 to 55 wt% of a thermosetting resin, is mixed with the titanium dioxide light reflector using a roll mill. Preparing a thermosetting adhesive by micro-dispersion in a thermosetting resin with a particle diameter of 2 to 3 μm; Putting the core glass beads into a stirrer, and then applying the thermosetting adhesive with stirring to uniformly apply the adhesive to the outer surface of the core glass beads; Extracting the first glass bead composite by uniformly orienting the spherical shell bead on the outer surface of the core glass bead by inserting a first spherical shell bead having a refractive index of 1.93 to 2.5 and having a particle size of 40 to 100 μm in the stirrer. ; Separating the extracted first glass bead composite into 120-150 mesh to separate the non-orientated spherical shell beads and the first green bead composite in the orientated green state; Preparing the cured first glass bead composite by placing the green first glass bead composite in a heating furnace at 120 ° C. to 150 ° C. for 2 to 4 hours, and curing the glass. Applying the adhesive to the outer surface of the cured first glass bead composite by putting the cured first glass bead composite back into the stirrer and then adding the thermosetting adhesive while stirring; By injecting a second spherical shell bead having a refractive index of 1.93 to 2.5 and having a particle size of 40 to 100 μm in the stirrer, the spherical shell bead is ununiformly oriented on the outer surface of the cured glass bead composite to take out the second glass bead composite. Making; Separating the extracted second glass bead composite into 120 to 150 mesh to separate the non-orientated spherical shell beads and the orientated green glass beads; Preparing the cured second glass bead composite by placing the green second glass bead composite in a heating furnace at 120 ° C. to 150 ° C. for 2 to 4 hours, and curing the mixture. The cured second glass bead composite was put into the stirrer again, and then a protective coating was added while stirring to fill the voids between the second spherical shell beads of the cured second glass bead composite to protect the coating. The protective coated glass bead composite is taken out into a heating furnace at 120 to 150 ° C., and thermally cured for 2 to 4 hours to increase the adhesion of the spherical shell beads.

Most preferably, the coating composition of the present invention is applied to a road paving material made of bicycle road paving, asphalt or concrete, an elastic paving material, an anti-slip paving material, and a urethane paving material which are constructed in a walkway, a playground, a park, etc. in a uniform thickness. Can be formed.

According to the present invention, the following effects are obtained.

First, by incorporating the heat conversion particles into the paint composition to consume the heat applied from the outside to the kinetic energy by the heat conversion particles to minimize the heat accumulation inside the packaging material, as a result of the plastic deformation or the deformation of the packaging material itself by the heat of the conventional packaging material It solved the problem of loss or departure.

Secondly, the shell beads are uniformly fixed to the outer surface of the core glass beads and the shell beads are non-uniformly fixed to the outer surface of the shell beads, thereby including the retroreflectors in the paint composition which greatly increase the retroreflectiveness in the paint composition, at night or in rainy weather. In addition, it is possible to secure excellent retroreflectiveness, which has the effect of greatly improving visibility.

Third, in the retroreflective body included in the paint composition of the present invention, the non-contact voids between the shell beads fixed on the outer surface of the core glass beads are filled with a protective coating agent, thereby increasing the bonding force and fixing force of the shell beads, and as a result, the non-contact voids and the like. It solved the problem of wear resistance and durability deterioration.

1 is a view showing the structure of the retroreflective body contained in the paint composition according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail. However, the concept of heat conversion used herein should be interpreted as converting heat energy into kinetic energy to dissipate heat to the outside.

The paint composition having excellent heat conversion properties and retroreflective properties according to the present invention may be selected from the group consisting of 10-15 wt% of an acrylic emulsion resin or a styrene-butadiene copolymer emulsion resin; Water soluble polyurethane resin 5-8 wt%; Heat shield pigments 4-8 wt%; It has a particle diameter of 50 to 100㎛, the inside is a hollow spherical polymer material, the outside is made of a spherical inorganic material surrounding the polymer material, the polymer material is the kinetic energy of heat energy incident by the thermal conversion motion 15 to 20 wt% of heat conversion particles to prevent wear and deterioration of the coating film while assisting the heat conversion motion; Retroreflector 3-6 wt%; Alumino silicate 3-5 wt%; Dispersant 1.5-2.0 wt%; And 20 to 40 wt% of water.

The acrylic emulsion resin or styrene-butadiene copolymer emulsion resin preferably contains 10 to 15 wt% as a base material for forming a coating film, which is less than 10 wt%, the adhesion of the coating film is reduced, the self-weight over time However, the problem of detachment due to external force and a problem of lowering elastic force may occur, and when used in excess of 15 wt%, elasticity and adhesion are insignificant, while the viscosity of the paint is increased, thereby reducing workability.

The water-soluble polyurethane resin is a generic name of a polymer compound having a urethane bond -OCONH- (NCO group) in a molecule, and has recently been used as a rubber-like elastomer such as urethane rubber, synthetic fiber, adhesive, paint, urethane foam and automobile bumper. The range is expanding. Generally, it manufactures by addition polymerization of diol (1, 4- butanediol etc.) and diisocyanate (diphenylmethane diisocyanate etc.). As rubber, aliphatic polyester of polyetherdiol and terminal diol, such as polyethyleneglycol and polypropylene glycol, is used as a diol. The use of the urethane foam is often thermoset by adding triisocyanate, but in the present invention, the water-soluble polyurethane resin uses a polyurethane of a thermoplastic resin, and the thermoplastic resin is solubilized. The water-soluble polyurethane resin is added to form a coating film when the coating is applied, if less than 5 w% or more than 8 w% is added to form a coating film is not made properly, the optimum range is 5 It is -8 w%.

Heat shield pigments are pigments with excellent heat reflectivity, and are divided into heat shield pigments that combine hollow glass bubbles and coloration. The hollow glass bubbles reflect more than 90% of the wavelength range of near-infrared 300 ~ 2,500 nm, and after drying, ceramic foam on top of the coating film. It generates heat energy by radiating heat energy into long wave electromagnetic waves, and heat shielding pigments are colored pigments pretreated with a compound of zirconium and aluminum, and can maximize heat shielding effect due to high solar reflectance and long wave reflectance. However, the hollow glass bubble has a disadvantage in that the air layer is formed in the pigment, and thus the flexibility and gloss of the hollow glass bubble are reduced when applied to the top coat. Therefore, in the present invention, it is preferable to use colored heat shield pigments that exhibit excellent heat shielding effect of high gloss. Preferably, 4-8 wt% is contained in consideration of a heat shielding effect. In particular, the heat shield pigment serves to primarily block the light incident into the packaging material, and further, the heat accumulated without being reflected is consumed by being converted into kinetic energy by the heat conversion particles described below.

The thermal conversion particles are made of very fine spherical granules in a micrometer unit, and the inside of the thermal conversion particles is made of a hollow spherical polymer material, that is, a thermoplastic resin plastic, and the outer surface of the polymer material is a spherical inorganic material. The hollow spherical high molecular material is thermally transformed by a catalyst, and the spherical inorganic material on the outer surface of the high molecular material assists the thermal conversion and prevents wear and deterioration of the coating film. These very fine grains of thermal conversion particles are evenly distributed in the paint, and when added in less than 15 wt% or more than 20 w%, there are too few or too many thermal conversion particles. Since the effect is reduced, the optimum range is 15-20 w%.

The following describes the principle of the thermal conversion particles of the thermal conversion particles of the present invention configured as described above. The heat dissipation effect of heat dissipation by converting the heat conversion particles into kinetic energy by heating the heat conversion particles with infrared light energy in the sun when the solar light is incident by the heat conversion particles in the coating film coated on the packaging material according to the present invention. Will be generated. More specifically, the thermal conversion particle of the present invention is composed of a hollow spherical polymer material and a spherical inorganic material surrounding the outer surface of the polymer material as described above. When the thermal conversion particles are heated by, for example, infrared rays in sunlight, the hollow polymer material expands, but the inorganic material on the outer surface hardly expands, causing expansion stress to occur in the polymer material. Then, when heating is continued by infrared rays, the polymer material inside is slightly deformed due to the expansion stress, thereby opening the thermal stress. Then, the slightly deformed internal polymer material generates a reaction force, and the reaction force of the air to be expanded further and further compresses, and instantly returns to its original shape, where the heat energy is converted into kinetic energy. Then, the polymer material returned to the circular shape is heated again to start expansion. By this repetitive action, the heat energy is converted into kinetic energy and the heat energy is dissipated, and as a result, heat accumulation in the packaging material can be minimized.

The aluminosilicate (Alumino silicate) is provided in the coating composition of the present invention as well as the thermal insulation, thermal insulation effect, as well as noise prevention function, in order to maximize the above-mentioned effect is used in the form of fine microscopic hollow powder (Ceramic Microscopic Hollow Spheres) It is preferable. At this time, if the use of less than 3 w%, the noise protection, heat shielding, and thermal insulation function is sharply reduced, and if the use is more than 5 w%, the above-mentioned effect is not greatly increased, but the expensive ceramic hollow powder is excessively used. Since the manufacturing cost greatly increases with this, it is preferable to use it within the above-mentioned use range.

The dispersing agent plays a role of evenly dispersing and storing stability and workability of the raw materials in the mixing process with other raw materials, when less than 1.5 wt% does not evenly dispersed between raw materials and exceeds 2.0 w% Dispersion force and workability is improved, but it is preferable to use within the above-mentioned range of use because it may be a cause of peeling phenomenon due to a decrease in water resistance.

As shown in FIG. 1, the retroreflector is coated on the outer surface of the core glass bead 10 having a spherical particle diameter of 400-800 μm and having a spherical shape, and has a refractive index nD of 2.5 to 3.1 titanium dioxide light. The first thermosetting adhesive layer 20 composed of the reflector 45 ~ 70wt% and the thermosetting resin 30 ~ 55wt%, is uniformly fixed to the outer surface of the first thermosetting adhesive layer by thermal curing, the refractive index is 1.93 ~ 2.5, 40 ~ A first spherical shell bead 30 having a particle diameter of 100 μm, applied to the outer surface of the spherical shell bead, made of 45 to 70 wt% of a titanium dioxide light reflector having a refractive index (nD) of 2.5 to 3.1 and a thermosetting resin of 30 to 55 wt% A second spherical shell bead 50 having a refractive index of 1.93 to 2.5 and a particle size of 40 to 100 μm, which is unevenly fixed to the outer surface of the second thermosetting adhesive layer by the second thermosetting adhesive layer 40 and thermal curing, And filling the voids between the second spherical shell bead It consists of a protective coating 60 which is thickened to increase the adhesion of the spherical shell beads.

The core glass beads 10 may use various inorganic balls such as soda ash glass balls, alumina balls, zirconia balls, and silicon carbide balls (SiC). However, in the present invention, soda ash glass beads (Soda-Limed silicates) in the aspect of the roundness (Roundness) of 80% or more and used in the range of 400 ~ 800 ㎛ particle size.

In the present invention, when the roundness of the core glass beads is 80% or less, it is not preferable because it adversely affects the single particle formation of the glass bead composite, and when the particle size is 400 μm or less, the particle size of the glass bead composite becomes small, so Due to the embedding increases, the retroreflectivity decreases due to the low retroreflective area of the light, and in the case of 800 µm or more, the particle diameter of the glass bead composite of the present invention is too large, resulting in excessive exposure height on the pate after lane construction, resulting in excessive wheel drop. The desorption rate of the glass bead composite due to heavy is not high, which is undesirable.

The titanium dioxide light reflector is a titanium oxide having a chemical structure of Ti-O2, and mixed and stirred with 45 to 70 wt% of a titanium dioxide light reflector having a refractive index (nD) of 2.5 to 3.1 and a thermosetting resin of 30 to 55 wt%. Thereafter, the titanium dioxide light reflector is micro-dispersed in a thermosetting resin with a particle diameter of 2 to 3 μm using a roll mill to prepare a thermosetting adhesive 20.

In particular, the titanium dioxide light reflector functions to more effectively reflect light rays incident to the retroreflective material of the present invention, and functions as a reflection enhancer of spherical shell beads of nD = 1.93 or more to be dispersed later in the thermosetting resin. . That is, the reflection enhancer such that light passing through the spherical shell bead is absorbed by the adhesive layer adhering the spherical shell bead to prevent the fall of light intensity.

Preferably, the titanium dioxide light reflector has a content of 45 ~ 70 wt% by mixing with a thermosetting resin to produce a thermosetting adhesive. In the present invention, when the content of titanium dioxide is 45 wt% or less, it is impossible to obtain a predetermined retroreflective performance, and when the viscosity is 70 wt% or more, the viscosity of the adhesive is so high that the shell beads cannot be uniformly fixed to the core glass beads, In addition, the embedding rate of the shell bead adhered to the adhesive layer is lowered to weaken the bonding force of the shell bead to reduce wear resistance and durability.

Since the thermosetting resin is a hardened body having excellent durability of insoluble and insoluble when completely cured, it has not only wear resistance and durability against lubrication load of automobile wheels, but also satisfies solvent resistance and heat resistance at the same time for solvents used in lane construction. It is resin which can be made. Typical thermosetting resins include epoxy resins, phenolic resins, polyester resins, polyurethane resins, and the like.

The first spherical shell bead 30 is uniformly fixed to the outer surface of the first thermosetting adhesive layer by thermosetting, has a refractive index of 1.93 to 2.5, and has a particle size of 40 to 100 μm. When the particle size is 40 μm or less, the particle size is small and the angle of incidence of the headlight is narrowed, thereby reducing the retroreflectivity. When the particle size is 100 μm or more, the retroreflection is increased, but the embedding rate is lowered. It is not preferable because it is detached by the wheel load.

The second thermosetting adhesive layer 40 is applied to the outer surface of the first spherical shell bead 30, 45 ~ 70wt% titanium dioxide light reflector having a refractive index (nD) of 2.5 ~ 3.1 as the first thermosetting adhesive layer It consists of 30-55 wt% of a thermosetting resin.

Like the first spherical shell bead 50, the second spherical shell bead 50 has a refractive index of 1.93 to 2.5, has a particle size of 40 to 100 µm, and is non-uniformly fixed to the outer surface of the second thermosetting adhesive layer by thermal curing. do. That is, the first spherical shell bead 30 is fixed uniformly over the entire outer surface of the core glass bead 10, while the second spherical shell bead 50 is non-uniform, i.e., the shell bead in a certain region is a plurality of layers In another specific area, the shell beads may be fixed in a single layer with only the first spherical shell beads. This is to make the second spherical shell bead unevenly fixed, unlike the first spherical shell bead uniformly fixed, rather to further improve the retroreflective properties of the entire retroreflector.

The protective coating 60 is filled in the voids between the second spherical shell bead serves to increase the adhesion of the spherical shell beads. Preferably, the protective coating agent is a thermosetting hybrid resin having a light transmittance of 90% or more. The protective coating agent of the present invention is because the structure of the glass bead composite of the present invention, since the embedding rate of the second shell bead adhered to the adhesive layer on the outer surface of the first shell bead is 30 to 40%, so that 60 to 70% is unbound. In order to compensate for the shortcomings that are likely to be released by the wheel's wheel load stress due to the principle of mating applied to the area of 60 to 70% of the unbonded shell beads. That is, according to the present invention, by further binding the protective coating to fill the non-bonding space of 60 to 70%, the problem that the shell beads on the existing composite are detached is greatly improved.

division Retroreflectivity (mcd / ㎡ / lx) After rain Dry Wet Standard (Korea) 130 130 Based on White (Wellow 90) Uniform / single layer structure 250-350 250-300 Good moldability and mixing Heterogeneous structure 500-600 350-450 Good bonding and durability

Table 1 is a table showing the retroreflectiveness when the non-uniform retroreflective body according to the present invention is constructed in a lane with a paint composition. As can be seen in Table 1, it can be seen that the non-uniform retroreflective construction according to the present invention has a much better retroreflective property than the construction of the retroreflective body of the Korean regulations and uniform / monolayer structure. In particular, when it is rainy, that is, when the road surface is wet, it can be seen that the reflex reflectance is about three times better than Korean regulations. Furthermore, in the case of the non-uniform retroreflector, the contact surface of the shell bead is improved by the non-uniform coating, and at the same time, the retroreflector structure is further densified by the adhesion and protective coating agent of the titanium dioxide light reflector and the thermosetting resin to increase durability. .

In addition, in the method of manufacturing the retroreflective material, 45 to 70 wt% of titanium dioxide light reflector having a refractive index (nD) of 2.5 to 3.1 and 30 to 55 wt% of thermosetting resin are mixed and stirred, and then the titanium dioxide light reflector is used by using a roll mill. Preparing a thermosetting adhesive by micro-dispersion to a thermosetting resin with a particle diameter of 2 to 3 μm, injecting the core glass beads into a stirrer, and then adding the thermosetting adhesive to the outer surface of the core glass beads by stirring. Applying the adhesive uniformly, by injecting the first spherical shell beads having a refractive index of 1.93 ~ 2.5, the particle diameter of 40 ~ 100㎛ into the stirrer uniformly orients the spherical shell beads on the outer surface of the core glass beads 1 extracting the glass bead complex, and sieving the extracted first glass bead complex into 120 to 150 mesh Separating the non-spherical spherical shell beads and the first green bead composite in the green state, the first green bead composite in the green state is placed in a heating furnace at 120-150 ° C. and cured by thermal curing for 2 to 4 hours. Preparing the first glass bead composite, and putting the cured first glass bead composite back into the stirrer, and then applying the thermosetting adhesive while stirring to apply an adhesive to the outer surface of the cured first glass bead composite. Step, by injecting a second spherical shell bead having a refractive index of 1.93 ~ 2.5, and has a particle size of 40 ~ 100㎛ in the stirrer to orient the spherical shell bead non-uniformly on the outer surface of the cured glass bead composite second glass bead composite In the step of extracting, the second glass bead composite is sieved to 120 ~ 150 mesh not orientated Separating the silver spherical shell bead and the second green bead complex in the green state, the second glass bead complex in the green state is put into a heating furnace of 120 ~ 150 ℃ and hardened by heat curing for 2 to 4 hours Preparing a second glass bead composite, putting the cured second glass bead composite back into the stirrer, and then adding a protective coating while stirring, between the second spherical shell beads of the cured second glass bead composite Filling the pores with a protective coating to the protective coating, taking out the protective coated glass bead composite into a heating furnace at 120 ~ 150 ℃ and heat curing for 2 to 4 hours to increase the adhesion of the spherical shell beads Include.

First, 45-70 wt% of titanium dioxide light reflectors having a refractive index (nD) of 2.5-3.1 and 30-55 wt% of a thermosetting resin are mixed and stirred. Preferably, using a roll mill to make the titanium dioxide light reflector to 2 ~ 3㎛ particle diameter micro-dispersion in the thermosetting resin (micro-dispersion) to prepare a thermosetting adhesive.

Then, the core glass beads are added to the stirrer, and then the thermosetting adhesive is added while stirring so that the adhesive is uniformly applied to the outer surface of the core glass beads.

Next, the first glass bead composite is uniformly oriented on the outer surface of the core glass bead by inserting a first spherical shell bead having a refractive index of 1.93 to 2.5 and a particle size of 40 to 100 μm into the stirrer. Take out.

Then, the extracted first glass bead composite is sieved to 120-150 mesh to separate the non-orientated spherical shell beads and the first green bead composite in the orientated green state (ie, uncured state). That is, since only a portion of the spherical shell beads introduced to the stirrer will be oriented on the outer surface of the core glass beads, while the remaining will be present as spherical shell beads in the state as injected, separating only the glass bead composites oriented by the sieving. to be.

Then, the first glass bead composite of the green state is put into a heating furnace of 120 ~ 150 ℃ heat curing reaction for 2 to 4 hours to prepare a cured first glass bead composite. That is, the first spherical shell bead is fixed to the core glass beads while the first thermosetting adhesive is cured by the thermosetting reaction.

Then, the cured first glass bead composite is put back into the stirrer, and then the adhesive is applied to the outer surface of the cured first glass bead composite by adding the thermosetting adhesive while stirring.

Then, by injecting a second spherical shell bead having a refractive index of 1.93 to 2.5 and a particle diameter of 40 to 100 μm into the stirrer, the spherical shell bead is ununiformly orientated on the outer surface of the cured glass bead composite to thereby form a second glass bead. The complex is taken out. In this case, the agitation speed of the stirrer can be adjusted to cause the shell beads to be unevenly oriented. In other words, increasing the stirring speed causes the shell beads to be unevenly oriented.

Then, the extracted second glass bead composite is sieved to 120 to 150 mesh to separate the non-orientated spherical shell beads and the orientated green state glass beads.

Then, the green glass second glass bead composite is put into a heating furnace at 120 ~ 150 ℃ heat curing reaction for 2 to 4 hours to prepare a cured second glass bead composite.

Finally, the cured second glass bead composite is put back into the stirrer, and then the protective coating is filled with stirring to fill the voids between the second spherical shell beads of the cured second glass bead composite to fill the protective coating. The protective coating, the protective coated glass bead composite is taken out and put in a heating furnace of 120 ~ 150 ℃ to heat curing for 2 to 4 hours to increase the adhesion of the spherical shell beads.

The coating composition according to the present invention can be formed by applying a uniform thickness to a bicycle road pavement, a road pavement made of asphalt or concrete, a walkway, a playground, a park, etc. have. Looking more specifically as follows.

end. Bicycle road paver

Bicycle roads can be constructed from a variety of materials, such as concrete, asphalt, urethane, etc., such a bicycle road pavement itself will cause a rise in temperature due to heat accumulation when exposed to direct sunlight for a long time. Furthermore, the driving line and the warning door formed on the bicycle road have a problem of low visibility due to a relatively weak light source.

Therefore, when the coating film is formed from the paint composition according to the present invention, the thermal accumulation is minimized to prevent plastic deformation and aggregate loss, and at the same time, it is possible to improve the visibility of lanes or caution signs by excellent retroreflective characteristics. There is this.

I. General road paver

A general road pavement made of asphalt or concrete also has a problem of heat accumulation due to direct sunlight, and in particular, visibility of a line or a mark such as a driving line or a danger sign is degraded at night or in rainy weather. Therefore, when the coating film is formed from the paint composition according to the present invention having excellent heat conversion characteristics and retroreflective characteristics as in the road pavement material, it is possible to solve the problem of heat accumulation and at the same time ensure visibility.

All. Elastic packing material

Recently, elastic pavements using rubber chips have been widely used in walkways, walkways, playgrounds, parks, and the like. However, when such an elastic packaging material is exposed to direct sunlight, there is a problem that the surface temperature of the packaging material rises to 60 degrees due to heat accumulation, etc., and a line or a pattern requiring visibility may also be installed at the place where the elastic packaging material is constructed. However, there is a problem that can not secure sufficient retroreflective properties at night or rainy weather to reduce visibility.

Therefore, likewise, when the coating film is formed by using the coating composition according to the present invention in the elastic packaging material, the above problems of thermal accumulation and visibility deterioration can be solved simultaneously.

An embodiment of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications are within the scope of the present invention as long as they are obvious to those skilled in the art.

10 ...... Core Glass Beads
20 ...... 1st thermosetting adhesive layer
30 ...... First spherical shell bead
40 ...... Second Thermosetting Adhesive Layer
50 ...... 2nd spherical shell bead
60 ...... protective coating

Claims

In the paint composition with excellent heat conversion characteristics and retroreflectivity,
10-15 wt% of acrylic emulsion resin or styrene-butadiene copolymer emulsion resin;
Water soluble polyurethane resin 5-8 wt%;
Heat shield pigments 4-8 wt%;
It has a particle diameter of 50 to 100㎛, the inside is a hollow spherical polymer material, the outside is made of a spherical inorganic material surrounding the polymer material, the polymer material is the kinetic energy of heat energy incident by the thermal conversion motion 15 to 20 wt% of heat conversion particles to prevent wear and deterioration of the coating film while assisting the heat conversion motion;
Retroreflector 3-6 wt%;
Alumino silicate 3-5 wt%;
Dispersant 1.5-2.0 wt%; And
20 to 40 wt% of water;
The retroreflector has a particle diameter of 400-800 μm and is coated on the outer surface of the spherical core glass beads, the core glass beads, 45-70wt% of titanium dioxide light reflector having a refractive index (nD) of 2.5-3.1 and the thermosetting resin 30- The first thermosetting adhesive layer made of 55wt%, the first spherical shell bead uniformly fixed to the outer surface of the first thermosetting adhesive layer by thermosetting, the refractive index is 1.93 ~ 2.5, has a particle size of 40 ~ 100㎛, the spherical A second thermosetting adhesive layer coated on the outer surface of the shell bead and composed of 45 to 70 wt% of a titanium dioxide light reflector having a refractive index (nD) of 2.5 to 3.1 and a thermosetting resin of 30 to 55 wt%; It adheres to the outer surface of the non-uniform, the refractive index is 1.93 ~ 2.5, the second spherical shell bead having a particle size of 40 ~ 100㎛, and filled in the air gap between the second spherical shell bead to fix the fixing force of the spherical shell beads A paint composition with excellent heat conversion characteristics and retroreflectivity, characterized by an increased protective coating.

The method of claim 1, wherein the retroreflective body,
After mixing and stirring 45 to 70 wt% of titanium dioxide light reflector having a refractive index (nD) of 2.5 to 3.1 and 30 to 55 wt% of thermosetting resin, the titanium dioxide light reflector was used to roll the thermosetting resin to a particle diameter of 2 to 3 μm using a roll mill. Micro-dispersion to prepare a thermosetting adhesive;
Putting the core glass beads into a stirrer, and then applying the thermosetting adhesive with stirring to uniformly apply the adhesive to the outer surface of the core glass beads;
Extracting the first glass bead composite by uniformly orienting the spherical shell bead on the outer surface of the core glass bead by inserting a first spherical shell bead having a refractive index of 1.93 to 2.5 and having a particle size of 40 to 100 μm in the stirrer. ;
Separating the extracted first glass bead composite into 120-150 mesh to separate the non-orientated spherical shell beads and the first green bead composite in the orientated green state;
Preparing the cured first glass bead composite by placing the green first glass bead composite in a heating furnace at 120 ° C. to 150 ° C. for 2 to 4 hours, and curing the glass.
Applying the adhesive to the outer surface of the cured first glass bead composite by putting the cured first glass bead composite back into the stirrer and then adding the thermosetting adhesive while stirring;
By injecting a second spherical shell bead having a refractive index of 1.93 to 2.5 and having a particle size of 40 to 100 μm in the stirrer, the spherical shell bead is ununiformly oriented on the outer surface of the cured glass bead composite to take out the second glass bead composite. Making;
Separating the extracted second glass bead composite into 120 to 150 mesh to separate the non-orientated spherical shell beads and the orientated green glass beads;
Preparing the cured second glass bead composite by placing the green second glass bead composite in a heating furnace at 120 ° C. to 150 ° C. for 2 to 4 hours, and curing the mixture.
The cured second glass bead composite was put into the stirrer again, and then a protective coating was added while stirring to fill the voids between the second spherical shell beads of the cured second glass bead composite to protect the coating. Taking out the protective coated glass bead composite into a heating furnace at 120 to 150 ° C. and heat curing for 2 to 4 hours to increase adhesion of the spherical shell beads;
Paint composition with excellent heat conversion characteristics and retroreflective, characterized in that manufactured through.

The coating composition according to claim 1 or 2 is applied to a bicycle pavement, a road pavement made of asphalt or concrete, an elastic pavement, an anti-slip pavement, and a urethane pavement to be constructed in a uniform, and a urethane pavement to form a coating film. A method for forming a coating film of a packaging material using a paint composition having excellent heat conversion characteristics and retroreflective properties, characterized in that