KR20180007611A - Coating Machine for Mark of Road - Google Patents

Abstract

The present invention relates to an internal mixing type coating machine for painting a mark of a road and, more specifically, relates to an internal mixing type coating machine which can maintain constant viscosity without a hardening state in accordance with time. The internal mixing type coating machine comprises a paint composition supply unit (110), a hardening agent supply unit (120), a thinner supply unit (130), and an internal mixer (140).

Description

{Coating Machine for Mark of Road}

The present invention relates to an internal mixing type sprayer for painting a road surface mark, and more particularly, to an internal mixing type sprayer capable of maintaining a constant viscosity without stiffness over time.

In general, the coating compositions used in the road surface sign is spraying the paint surface by an individual seal with the curing agent in the outer coating is based paint for road signs. In order to improve the uniformity of the coating composition, it is important that such a coater maintains a constant viscosity without any stagnation over time. However, the external mixing type sprayer has a problem that workability and efficiency are inferior because a mixing operation is performed outside the sprayer.

However, in order to solve such a problem, there is a limit in that when the internal mixer is used, the painting operation itself becomes difficult as the time is delayed due to the settling phenomenon caused by the mixture of the paint and the curing agent.

On the other hand, conventional room-temperature curing type plastic coating compositions for quick-drying road surface marking contain a large amount of resins having hard properties, so that cracking and / or loss of part of the coating film Respectively.

In addition, the conventional paint composition has a high specific gravity of the entire paint due to the nature of the high solids content such as pigment powder, which lowers the workability and workability, and also limits the improvement of various physical properties such as paint elasticity, numerical stability and storage stability .

The present invention has been made to solve the problems of the prior art described above, and it is an object of the present invention to provide a coating composition capable of retarding the time of occurrence of stagnation phenomenon when using an internal mixing type coating machine using glass bubbles, And it is an object of the present invention to provide an internal mixing type sprayer capable of improving the uniformity of glass bubbles.

The present invention also provides an internal mixer using a coating composition for road marking which can improve various properties such as elasticity, numerical stability, storage stability and the like of a paint as well as improving the workability and workability of the paint by lowering the specific gravity of the paint composition .

In order to achieve the above object, the present invention provides a sprayer for spraying spray paint on a surface of a road through a paint spray nozzle to paint a road mark, comprising a paint composition supply unit 110, a hardener supply unit 120, a coating composition and a curing agent supplied from the coating composition supply unit 110 and the curing agent supply unit 120 are mixed and stored in the inner mixer 140. The thinner supply unit 130 and the inner mixer 140 And spraying the mixture through a paint spraying nozzle. The present invention provides an internal mixer for painting a road surface mark.

At this time, the control unit 150 may control the amount of the coating composition, the curing agent, and the thinner supplied to the internal mixer 140.

Also, in one embodiment, the internal mixer 140 may include a sensor 160 for measuring the residual amount of the mixed liquid in the internal mixer 140 and the residence time.

The controller 150 supplies the thinner from the thinner supply unit 130 to the inner mixer 140 when the residence time of the mixed solution in the inner mixer 140 exceeds a predetermined time, The amount of the thinner to be supplied to the inner mixer 140 may be adjusted according to the amount of the mixed liquid remaining in the inner mixer 140.

At this time, if the residence time of the mixed liquid in the inner mixer 140 exceeds 2 to 3 minutes, the thinner may be supplied from the thinner supply unit 130 to the inner mixer 140.

The coating composition in the coating composition supply unit 110 may include a polymer polymer, an inorganic filler, a pigment, a dispersant, a curing accelerator, an antioxidant, an adhesion promoter and a hollow glass bubble, Preferably, the composition comprises glass bubbles in an amount of 5 to 20 parts by weight based on 100 parts by weight of the entire coating composition excluding glass bubbles.

The inner mixing type sprayer of the present invention can prevent the stagnation phenomenon which is a problem of the conventional internal mixing type sprayer and can improve the workability and efficiency of the painting operation and keep the viscosity of the paint composition in the sprayer continuously, The uniformity of bubbles can be improved.

In addition, the coating composition containing a glass bubble used in the internal mixing type coating machine of the present invention not only delays the occurrence of stagnation caused by the mixing of the coating material and the curing agent but also lowers the specific gravity while maintaining the viscosity of the coating composition Workability and workability can be improved, and various physical properties such as paint elasticity, numerical stability, storage stability and the like can be improved.

Fig. 1 is a conceptual diagram showing the configuration of the sprayer of the present invention. Fig.
2 - Comparative photographs showing the film elasticity of the Examples and Comparative Examples measured according to the Experimental Example of the present invention
3 and 4 - Comparative photographs showing the storability of the Examples and Comparative Examples measured according to the Experimental Example of the present invention

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as disclosed to those skilled in the art. It does not mean that the category is limited.

Throughout this specification, when an element is referred to as "including" an element, it is understood that it may include other elements as well, without departing from the other elements unless specifically stated otherwise. In addition, each step may be performed differently from the stated order unless explicitly stated in the context in the specific order.

The coating composition is generally painted on the road surface mark through an external mixing type sprayer in which the coating material and the curing agent are sprayed separately. However, such an external mixing type sprayer has a problem in that workability and efficiency are inferior due to mixing work outside the sprayer . However, in order to solve such a problem, there is a limit in that when the internal mixer is used, the painting operation itself becomes difficult as the time is delayed due to the settling phenomenon caused by the mixture of the paint and the curing agent.

Accordingly, the internal mixer of the present invention is characterized by improving the viscosity of the composition and the uniformity of the glass bubble in the composition without stagnation over time.

Specifically, the coater of the present invention includes a coating composition supply unit 100, a hardener supply unit 120, a thinner supply unit 130 and an internal mixer 140 as shown in FIG. 1, And the coating composition and the curing agent supplied from the coating composition supply unit 110 and the curing agent supply unit 120 are mixed and stored in the inner mixer 140.

In this case, the sprayer of the present invention preferably further includes a controller 150 to appropriately control the amount of the coating composition, the curing agent, and the thinner supplied to the internal mixer 140. In one embodiment, 140 may further include a sensor 160 for measuring the remaining amount of the mixed liquid in the internal mixer 140 and the residence time.

When the residence time of the mixed liquid in the inner mixer 140 exceeds a predetermined time to maintain a predetermined viscosity of the paint in the inner mixer of the present invention, It is preferable that the inner mixer 140 is configured to supply the thinner.

In this case, the controller 150 controls the supply amount of the thinner supplied to the internal mixer 140 according to the residual amount of the mixed liquid in the internal mixer 140.

If the residence time of the mixed solution in the inner mixer 140 is more than 2 to 3 minutes, the residence time of the mixed solution from the inner mixer 140 to the inner mixer 140 may be varied, A thinner may be supplied to the coating unit 140 to prevent the hardening phenomenon by washing the coating.

Meanwhile, the coating composition used in the coating machine of the present invention preferably contains a glass bubble in the composition in order to delay the time of occurrence of the settling phenomenon itself.

Conventional paint compositions have a high specific gravity of the entire paint due to the characteristics of high solids contents such as pigment powder, which not only accelerates the formation of stagnation phenomenon when using the internal blend type paint machine, but also lowers the workability and workability and causes paint elasticity, numerical stability, And so on.

On the other hand, the glass beads for paint used in the conventional road marking are filled in the inside and are used only in a form to be sprayed on the coating film, which serves to show the luminance of light reflected from the coating film and has no effect on the physical properties of the coating composition. I could not give it.

The present invention can delay the occurrence of stagnation phenomenon itself when using the inner mix type paint machine by newly applying the hollow glass bubble as the material of the paint composition instead of the conventional glass beads filled in the inner form, To improve properties and workability, and to improve various physical properties of the coating material.

The glass bubble is a hollow hollow glass sphere having a void space therein to reduce the specific gravity of the entire paint. In order to realize a high strength and low specific gravity, the material is chemically stable soda lime borosilicate glass It is preferable that it is made of soda-lime-borosilicate glass.

The glass bubbles delay the standing time of the solidification phenomenon when using the internal mix type paint machine and reduce the weight of the paint to improve the workability in the process of manufacturing and compounding the paint and improve the workability in actual coloring of the road, And increase the competitiveness.

In addition, as the void space is formed in the glass bubble, numerical deformation with respect to temperature change is small, recovery elasticity by external impact is high, and specific gravity is low, so that uniformity of glass bubbles in the composition and storage stability for a long period of time are high.

It is preferable that the glass bubble is added in an amount of 5 to 20 parts by weight based on 100 parts by weight of the entire coating composition excluding the glass bubble. When the content of the glass bubble is too small, the effect of reducing the specific gravity due to the glass bubble and various physical properties are hard to appear. When the amount of the glass bubble is too small, the content of the other composition in the composition is relatively decreased, Can be degraded.

In addition, the glass bubble may have various sizes depending on the working environment, but it is preferable that the glass bubble has a diameter of 10 to 30 탆. If the size of the glass bubble is larger than the above range, not only the elasticity and shelf stability of the coating film deteriorate but also the breaking strength of the glass bubble falls below 100 MPa and the stability of the glass bubble deteriorates. When the size of the glass bubble is smaller than this range, It is difficult to expect an effect of improving resilience.

On the other hand, it is preferable that the glass bubble has a porosity of at least 30% or more, preferably 30 to 90% in order to exhibit a sufficient specific gravity drop and improvement in physical properties.

Also, the paint composition containing the glass bubble of the present invention is much lower than the general paint composition and has a low specific gravity of 1.3 or less. It is preferably 1.2 to 1.3 in view of workability, workability and physical properties.

The coating composition containing the glass bubble of the present invention may be applied to general coating compositions used for road surface marking paints, but preferably comprises 25 to 65 wt% of polymer, 30 to 70 wt% of pigment, 1 to 5 wt% It is preferable to use a quick drying room temperature curable composition comprising 0.01 to 1 wt% of an inorganic filler, 0.01 to 1 wt% of a curing accelerator, 0.01 to 1 wt% of an antioxidant and 0.1 to 1 wt% of an adhesion promoter.

Generally, the polymeric polymer used in conventional fast drying ordinary-temperature curing type coating compositions generally contains a large amount of hard resin in order to improve abrasion resistance and water resistance at the time of coating, but the coating composition containing the glass bubble of the present invention contains glass bubbles It is preferable to use a polymer polymer mixed with a soft polymer polymer and a hard polymer polymer in order to minimize the cracking of the coating film due to the glass polymer and to improve the adhesion with the glass bead.

A large amount of the soft polymer polymer constituting the polymer polymer not only minimizes the cracking of the coating film due to the glass bubble inclusion by raising the impact resistance with a high specific elastic modulus and elongation but also the coating composition and the glass The adhesion with the bead can be improved.

At this time, the flexible polymer may be various materials capable of realizing a high modulus of elasticity and elongation. Preferably, the soft polymer is selected from the group consisting of ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, butanediol, neopentyl glycol, , And hexanediol, and a dibasic acid such as adipic acid, succinic acid, terephthalic acid, and the like can be used. The hard polymer may be a general epoxy resin, a polymethylmethacrylate resin, a poly A mid resin and the like can be used.

Further, the present invention is a flexible polymeric polymer and may comprise a polyester resin represented by the following formula (1). The following polyester resin compounds having a large number of alcohol functional groups preferably have a molecular weight of 1,000 to 80,000. (R, R ': a linear, branched or cyclic alkyl group having 1 to 10 carbon atoms, and n is 3 to 30)

≪ Formula 1 >

In order to improve the adhesion of the glass beads while minimizing cracking of the coating film, the weight ratio of the soft polymer to the light polymer is preferably 2: 0.5 to 1.5.

Hereinafter, the coating composition of the present invention will be described with reference to various experimental examples. However, the following Production Examples and Experimental Examples are intended to illustrate the present invention specifically, and do not limit the scope of the present invention.

[Experimental Example 1]

Preparation of coating composition for road surface marking

1) 450 g of phthalic anhydride and 450 g of ethylene glycol were mixed in a reactor capable of discharging the produced water and stirred, and dehydration condensation reaction was carried out at 200 ± 10 ° C for 10 hours while injecting nitrogen gas to discharge the produced water. Was synthesized. 1 wt.% Of an amine-based accelerator, 1 wt.% Of an antioxidant, 1 wt.% Of a silicone-based adhesion promoting agent 1 wt.% Of an epoxy resin, 20 wt.% Of an epoxy resin, 40 wt.% Of a pigment, 5 wt. %, And 1% by weight of paraffin wax.

2) Comparative Examples 1 to 3 and Examples 1 to 3 were prepared by varying the content of glass bubbles (20 mu m in diameter) as shown in Table 1 based on 100 parts by weight of the coating composition.

3) Further, Comparative Examples 4 to 6 and Examples 4 to 6 were prepared by varying the diameters of the glass bubbles (containing 7 parts by weight based on 100 parts by weight of the coating composition) added to the coating composition as shown in Table 2 below .

Comparative Example 1 Comparative Example 2 Example 1 Example 2 Example 3 Comparative Example 3 Content of glass bubble
(Relative to 100 parts by weight of the coating composition) 0 3 5 12 20 22

Comparative Example 4 Example 4 Example 5 Example 6 Comparative Example 5 Comparative Example 6 Diameter of glass bubble (탆) 5 10 20 30 40 50

[Experimental Example 2]

Physical Properties of Coating Composition

1) Physical properties of Comparative Examples and Examples prepared in Experimental Example 1 were measured and shown in the following Tables and Drawings.

1) The viscosity was measured using a KU viscometer (BROOKFIELD KU-2) and the luminance was measured using a road surface display brightness meter (Road Vista / U.S.A Stripe Master 2 Touch) and specific gravity cup was used.

② Appearance of the coated film shall be asphalt (about 170 mm × 150 mm × 10 mm) coated on one side with a film applicator so that the thickness of the dried film becomes maximum 0.1 mm and dried for 24 hours. Wrinkles, stains, bumps, cracks, etc. were observed from the eyes, and the tackiness was examined with the fingertips.

③ For the elasticity of the film, the specimen was held in the hand and pressed down to 90 °. The specimen was straightened and the film was visually observed.

(5) Storage stability The coating composition was stored at 50 캜 for 30 days, visually observed for the liquid state, and the change rate (%) of the viscosity (KU) was measured.

2) Table 3 shows the results of various physical properties tests for Comparative Examples 1 to 3 and Examples 1 to 3, and FIG. 2 is a comparative photograph showing the difference in storage stability between Examples 2 and 3. As can be seen from the following Tables and figures, it was confirmed that the embodiments containing the glass bubble of the present invention were stable in various physical properties such as specific gravity, appearance, film elasticity, storage stability and the like.

Test Items Test Specification Comparative Example 1 Comparative Example 2 Example 1 Example 2 Example
3 Comparative Example
3 Viscosity (KU) 85.0 90.0 90.0 90.0 90.0 90.0 90.0 importance - 1.4 1.37 1.27 1.24 1.22 1.15 Appearance of the film Appearance Good condition Good Good Good Good Good Craig Luminance value
(mcd / lx < - 847 849 863 869 864 860 Coat elasticity Appearance Good condition Good Good Good Good Good Craig Zhejiang Province
(50 占 폚 for 30 days) Good liquid condition Good Good Good Good Good Bad Change in viscosity (KU) / change ratio (%) + 5.5 /
6.5 + 5.3 /
6.3 + 5.1 /
6.0 + 5.4 /
6.4 + 5.7 /
6.7 Measure
Impossible

3) Table 4 shows the results of various physical properties tests for Comparative Examples 4 to 6 and Examples 4 to 6, and FIG. 2 is a graph showing the elasticity of the coatings of Examples 4 and 6 and Comparative Examples 5 and 6 Fig. 3 is a comparative photograph showing the difference in storage stability between Example 5 and Comparative Example 5. Fig. As can be seen from the following Tables and figures, it was confirmed that the glass bubble-containing examples of the present invention were stable in various physical properties such as specific gravity, appearance, film elasticity and storage stability.

Test Items Test Specification Comparative Example 4 Example 4 Example
5 Example 6 Comparative Example
5 Comparative Example
6 Viscosity (KU) 85.0 90.0 90.0 90.0 90.0 90.0 90.0 importance - 1.32 1.28 1.24 1.22 1.22 1.23 Appearance of the film Appearance Good condition Good Good Good Good Craig Craig Luminance value
(mcd / lx < - 850 860 864 865 864 860 Coat elasticity Appearance Good condition Good Good Good Good Craig Craig Zhejiang Province
(50 占 폚 for 30 days) Good liquid condition Good Good Good Good Bad Bad Change in viscosity (KU) / change ratio (%) + 5.1 /
6.5 + 5.3 /
6.3 + 5.5 /
6.5 + 5.7 /
6.7 Not measurable Not measurable

As can be seen from the above embodiments, the coating composition containing the glass bubble of the present invention can improve the workability and workability by lowering the specific gravity while maintaining the viscosity as it is, and it is also possible to improve the paint elasticity, numerical stability, Various physical properties can be improved. In addition, when the coating composition containing the glass bubble of the present invention is applied to the internal mixing type coating machine, the occurrence of stagnation due to the mixing of the coating composition and the curing agent can be delayed.

In addition, the internal mixer of the present invention can prevent stagnation caused by mixing of a paint and a curing agent, which is a problem of the conventional internal mixer, and can improve workability and efficiency of a painting operation, So that the uniformity of the glass bubble in the coating composition can be improved.

The embodiments of the present invention described above 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 will fall within the scope of the present invention if they are apparent to those skilled in the art.

100: internal mix type paint applicator 110: paint composition supply unit
120: Curing agent supply unit 130: Thinner supply unit
140: internal mixer 150: control unit
160: sensor 170: nozzle

Claims (7)

1. A sprayer for spraying a paint onto a surface of a road through a paint spray nozzle to paint a road surface cover paint,
A coating composition supply unit 110, a hardener supply unit 120, a thinner supply unit 130 and an internal mixer 140,
Wherein the coating composition and the curing agent supplied from the coating composition supply unit (110) and the curing agent supply unit (120) are mixed and stored in the internal mixer (140) and sprayed through a paint spraying nozzle. Internal mixer for spraying.
The method according to claim 1,
Further comprising a controller (150) for controlling the amount of the coating composition, the curing agent, and the thinner supplied to the internal mixer (140).
The method according to claim 1,
Wherein the internal mixer (140) comprises a sensor (160) for measuring the residual amount of the mixed liquid in the internal mixer (140) and the residence time.
The method according to claim 1,
The control unit 150 supplies the thinner from the thinner supply unit 130 to the inner mixer 140 when the residence time of the mixture in the inner mixer 140 exceeds a predetermined time, Wherein the supply amount of the thinner to be supplied to the inner mixer (140) is adjusted according to the residual amount of the mixed liquid in the inner mixer (140).
5. The method of claim 4,
Wherein the thinner is supplied from the thinner supply unit (130) to the inner mixer (140) when the residence time of the mixture in the inner mixer (140) exceeds 2 to 3 minutes. Sprayer.
The method according to claim 1,
Characterized in that the coating composition in the coating composition supply unit (100) comprises a polymer polymer, an inorganic filler, a pigment, a dispersant, a hardening accelerator, an antioxidant, an adhesion promoter and a hollow glass bubble group.
6. The method of claim 5,
Wherein the coating composition comprises 5 to 20 parts by weight of glass bubbles based on 100 parts by weight of the entire coating composition excluding the glass bubble.

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