KR20220125467A - Spray coating composition for 3D scanning - Google Patents

Abstract

The present application relates to a spray coating composition for 3D scanning. When the coating composition of the present application is used for 3D scanning, it can be uniformly applied to a material to be scanned. After the coating composition of the present application is applied, it can be easily removed after a certain period of time without a separate cleaning treatment. The coating composition of the present application can easily control the time from application to removal.

Description

Spray coating composition for 3D scanning

The present application relates to a spray coating composition for 3D scanning and a mixture containing the same, and more particularly, to facilitate scanning by spraying a solution containing a volatile solid organic compound and a liquid solvent, and the coating disappears spontaneously after a certain period of time. It relates to a spray coating composition for scanning and a mixture comprising the same.

Instead of modeling an object or a specific product with 3D computer graphics (s), the scanner is used to extract the coordinate values of the object's outline using a scanner to obtain data in the form of NURBS, polygons, or patches. ) is called a scanner.

The data obtained from the 3D scanner is widely applied not only in the fields of CAD, CAM, and CAE, but also in the medical field, 3D virtual reality, Web-3D, games, and animation.

3D scanners are also used for reverse engineering and quality inspection of products. After obtaining a shape point cloud for an actual product using a 3D scanner, reverse engineering is performed using the point cloud data, and dimension inspection of the product is also possible by comparing the reverse engineering data with the CAD data. As a result of quality inspection of airplanes, tanks, and parts using reverse engineering software, extensive and precise quality control is possible compared to the existing CMM method.

In the case of cultural properties, the 3D digital cultural property database construction project through digitalization is being actively carried out in Korea. Recognizing the need for digitization of major domestic cultural assets, we are implementing a digital cultural heritage building project using actual 3D scanning.

As an example of the data obtained after scanning cultural assets, the 3D data obtained from the scanner can be used for virtual museums (exhibiting cultural assets in cyberspace), restoration, etc.

3D data is also utilized in replication. As an example of reproduction, public officials, etc. rent records received during overseas tours to hold exhibitions, but there are problems such as damage and loss of the original. As a way to solve this problem, replicas are produced by 3D scanning, and replicas are displayed.

Digital reproduction is being actively applied in the field of customized products that take into account the individual body type. In particular, as the application in functional shoe manufacturers is steadily increasing, domestic shoe-related research institutes and companies are already conducting research related to custom shoe manufacturing.

As an example of surfacing after scanning a person's foot, it is possible to create a shoe that perfectly matches each individual's foot shape after importing the surface created in reverse engineering software into 3D CAD.

Another application for customization is a surgeon's surgical glove. When a high-precision operation is required, the surgeon's surgical glove must perfectly match the shape of the surgeon's hand wearing it. have.

In the case of the United States, the application of digital cloning in the medical field is making remarkable progress. In particular, applications in dentistry-related fields and artificial joints have passed the research stage and are entering the mature stage of providing actual services to patients. In addition, digital duplication technology is actively applied in the production of a virtual model of the human body.

In such a 3D scan, if the part to be inspected by the object is transparent or has specular or total reflection such as a mirror when scanning an object, optical difficulties arise in that the 3D scanner cannot accurately recognize the information of the object.

In order to solve the object recognition problem that may occur during 3D scanning of transparent glass, transparent acrylic, or high-gloss metallic materials that can cause specular reflection, such as crystal that passes through without reflection, Diffuse Reflection or diffuse reflection is introduced to solve the problem. There is a need for a 3D scanner to be able to collect information about the surface of an object.

On the other hand, when the surface of the base material to be scanned is adhered or adhered to induce a diffusely or diffusely reflective surface, an error may occur due to a thickness or a foreign body, which may cause an error.

With the rapid growth of the market, technology development for 3D printing is becoming active, but domestic R&D mainly focuses on 3D printer itself, 3D printing material, software, etc. the current situation.

However, some technologies have been proposed in response to this request. In particular, a spray solution containing only inorganic particles or surface-modified inorganic particles or organic particles in the spray gas has been developed. The disadvantage is that the surface is uneven.

In addition, in order to facilitate 3D scanning, a developer solution containing a large number of toxic substances is used, which has a problem of high toxicity and risk. The conventional 3D scan-only spray sold on the market has the disadvantage of being expensive because it is manufactured abroad, and it has the disadvantage that a secondary operation that needs to remove the coating surface after scanning is essential.

In addition, depending on the solution, there is a problem in that the degree of dispersion of the particles in the solution decreases when used after long-term storage, which leads to clogging of the spray nozzle and deterioration of coating performance including uniformity of the coating surface.

Therefore, it is time to in-depth research on coating compositions that can solve these problems.

An object of the present application is to provide a coating composition for 3D scan that improves the coating power of the coating layer for 3D scan, the coating is automatically removed after a certain period of time after spray coating, and the coating performance can be maintained even after long-term storage.

In addition, the present application is to provide a spray mixture for 3D scan, a device capable of variously controlling the coating duration by adjusting the composition ratio of the coating composition for 3D scan.

An aspect of the present application includes a first volatile solid organic compound, a second volatile solid organic compound, a first solvent, and a second solvent, and the solubility of the first volatile solid organic compound in the first solvent is determined by the first For 3D scan, which is less than the solubility of the volatile solid organic compound in the second solvent, the vapor pressure of each of the first volatile solid organic compound and the second volatile solid organic compound is different from each other and has a value within the range of 0.05 mmHg to 3.5 mmHg It relates to a spray coating composition.

In one example, the solubility of the second volatile solid organic compound in the first solvent may be greater than the solubility of the second volatile solid organic compound in the second solvent.

In one example, the first volatile solid organic compound may be adamantane.

In one example, the second volatile solid organic compound may be naphthalene, camphor, camphene, borneol, or a combination thereof.

In one example, the first solvent may be alcohol.

In one example, the second solvent may be a hydrocarbon compound.

In one example, the ratio (V2/V1) of the volume (V1) of the first solvent to the volume (V2) of the second solvent may be 1 to 40.

In one example, the ratio (SW1/SW2) of the weight (SW1) of the first volatile solid organic compound to the weight (SW2) of the second volatile solid organic compound may be 0.04 to 12.5.

In one example, the ratio (SW1/(V1+V2)) of the weight (SW1) of the first volatile solid organic compound to the total volume of the first solvent and the second solvent (V1+V1) is 0.01 g/mL to 0.125 g/mL.

In one example, the ratio (SW2/(V1+V2)) of the weight (SW2) of the second volatile solid organic compound to the total volume of the first solvent and the second solvent (V1+V2) is 0.01 g/mL to 0.5 g/mL.

In one example, the total content of the first volatile solid organic compound and the second volatile solid organic compound may be 1 wt% to 50 wt%.

Another aspect of the present application relates to a spray mixture for 3D scan comprising the coating spray coating composition for 3D scan and a spray gas.

In one example, the spray gas may be liquefied petroleum gas, nitrogen, argon, or a mixture thereof.

Another aspect of the present application is a container for spraying; And it relates to a spray device for 3D scanning containing the liquid contained in the container and the spray mixture for 3D scanning.

Another aspect of the present application is a container for spraying comprising a first accommodating part and a second accommodating part; The liquid contained in the first accommodation unit and the spray coating composition for 3D scan; And it relates to a spray device for 3D scanning comprising a spray gas accommodated in the second accommodating part.

In one example, the spray gas may be one selected from the group consisting of liquefied petroleum gas, nitrogen and argon.

When the coating composition of the present application is used for 3D scanning, it may be uniformly applied to the material to be scanned.

After the coating composition of the present application is applied, it can be easily removed when a certain period of time passes without a separate cleaning treatment.

The coating composition of the present application can easily control the time from application to removal.

1 is a transmittance of a specimen measured after coating the coating compositions of Experimental Examples 1 to 3 (left) and Experimental Examples 4 to 6 (right).
2 is a photograph of a specimen taken after coating the coating compositions of Experimental Examples 7 and 8.
3 is a photograph of a specimen taken after coating the coating composition of Experimental Examples 9 to 14.
Figure 4 is the transmittance of the specimen measured after coating the coating composition of Experimental Examples 9 to 14.
5 is a photograph of a specimen taken after coating the coating composition of Examples 1 to 5.
Figure 6 is the transmittance of the specimen measured after coating the coating composition of Examples 1 to 5.
7 is a photograph of a specimen taken after coating the coating composition of Example 4 and Examples 6 to 9.
8 is a photograph of a specimen taken after coating the coating composition of Example 4 and Examples 6 to 9.

Since the present application may have various changes and may have various embodiments, specific embodiments will be illustrated and described in the drawings.

However, this is not intended to limit the present application to specific embodiments, and it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present application. In describing the present application, if it is determined that a detailed description of a related known technology may obscure the gist of the present application, the detailed description thereof will be omitted.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terms used in the present application are used only to describe specific embodiments, and are not intended to limit the present application. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as "comprises" or "have" are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Accordingly, the configuration shown in the embodiment described in the present specification is only the most preferred embodiment of the present application and does not represent all the technical spirit of the present application, so various equivalents that can be substituted for them at the time of the present application and variations.

In addition, it should be understood that the accompanying drawings in the present application are enlarged or reduced for convenience of description.

Hereinafter, the spray coating composition for 3D scanning of the present application will be described in detail with reference to the accompanying drawings. However, the accompanying drawings are exemplary, and the scope of the spray coating composition for 3D scan of the present application is not limited by the accompanying drawings.

This application relates to a spray coating composition for 3D scanning.

The spray coating composition for 3D scanning of the present application includes at least two kinds of volatile solid organic compounds and at least two kinds of solvents. That is, the spray coating composition for 3D scanning of the present application includes at least a first volatile solid organic compound, a second volatile solid organic compound, a first solvent, and a second solvent.

A volatile solid organic compound means a solid organic compound that is volatile at room temperature, ie sublimable.

"Room temperature" means a natural temperature that is not specially heated or reduced. The room temperature may be, for example, a temperature in the range of 20°C to 30°C, about 23°C or about 25°C.

The degree of sublimation of the first volatile solid organic compound and the second volatile solid organic compound at room temperature is different from each other. Usually, since the degree of sublimation of the sublimable compound is quantified by vapor pressure, the first volatile solid organic compound and the second volatile solid organic compound have different vapor pressures. Vapor pressure is the vapor pressure at room temperature.

The volatile solid organic compounds applied to the spray coating composition for 3D scan of the present application have vapor pressures within a specific range. Specifically, the vapor pressure of each of the first volatile solid organic compound and the second volatile solid organic compound is 0.05 mmHg to 3.5 mmHg. The vapor pressure is within the above range, and by applying a plurality of different volatile solid organic compounds, excellent coating properties can be secured, and the coating duration can be adjusted to suit the purpose.

The vapor pressure may be, in another example, 0.055 mmHg or more, 0.06 mmHg or more, or 0.065 mmHg or more, and 3.48 mmHg or less, 3.45 mmHg or less, 3.40 mmHg or less, or 3.38 mmHg or less.

In the composition used in the present application, when the vapor pressure of the volatile solid organic compound is out of the above range, for example, when it is less than the above range, the time required for the composition to remain in its state after being coated (hereinafter, It is difficult to adjust the "residence time") to a desired level. For example, if a volatile solid organic compound having a vapor pressure less than the above range (for example, cyclododecane, which is known to have a vapor pressure of 0.004 mmHg at 25°C) is applied, the duration is excessively increased even with a very small amount. It is necessary to control the content of the component very delicately, which is usually not easy. The same applies to the case of applying a volatile solid organic compound having a vapor pressure exceeding the above range.

The first solvent and the second solvent have different solubility for a specific solute. For some solutes, the solubility of the first solvent is higher than that of the second solvent, and for some other solutes, the solubility of the second solvent is lower. By using the solvents having different solubility as described above, appropriate miscibility with the first volatile solid organic compound and the second volatile solid organic compound may be secured. Solubility means room temperature solubility.

Specifically, the solubility of the first volatile solid organic compound in the first solvent is less than the solubility of the first volatile solid organic compound in the second solvent.

In another example, the solubility of the second volatile solid organic compound in the first solvent is greater than the solubility of the second volatile solid organic compound in the second solvent.

For example, the solubility of the first volatile solid organic compound in the first solvent may be 0.01 g/mL or less. In another example, the solubility of the first volatile solid organic compound in the first solvent may be 0.009 g/mL or less, 0.008 g/mL or less, or 0.007 g/mL or less, and 0.001 g/mL or more, 0.002 g/mL or less. or more, 0.003 g/mL or more, 0.004 g/mL or more, 0.005 g/mL or more, or 0.006 g/mL or more.

In another example, the solubility of the first volatile solid organic compound in the second solvent may be 0.05 g/mL or more. In another example, the solubility of the first volatile solid organic compound in the second solvent is 0.06 g/mL or more, 0.07 g/mL or more, 0.08 g/mL or more, 0.09 g/mL or more, 0.1 g/mL or more. , 0.11 g/mL or more, 0.12 g/mL or more, 0.13 g/mL or more, 0.14 g/mL or more, or 0.15 g/mL or more, and 0.5 g/mL or less, 0.4 g/mL or less, 0.3 g/mL or less , 0.2 g/mL or less or 0.15 g/mL or less.

The solubility of the second volatile solid organic compound in the first solvent may be 0.4 g/mL or more. In another example, the solubility of the second volatile solid organic compound in the first solvent is 0.45 g/mL or more, 0.50 g/mL or more, 0.55 g/mL or more, 0.60 g/mL or more, 0.65 g/mL or more. or 0.70 g/mL or more, and may be 1.0 g/mL or less, 0.95 g/mL or less, 0.90 g/mL or less, 0.85 g/mL or less, or 0.80 g/mL or less.

The solubility of the second volatile solid organic compound in the second solvent may be 0.3 g/mL or less. In another example, the solubility of the second volatile solid organic compound in the second solvent is 0.29 g/mL or less, 0.28 g/mL or less, 0.27 g/mL or less, 0.26 g/mL or less, 0.25 g/mL or less. , 0.24 g/mL or less, 0.23 g/mL or less, 0.22 g/mL or less, 0.21 g/mL or less, or 0.20 g/mL or less, and 0.10 g/mL or more, 0.15 g/mL or more, or 0.20 g/mL or more. can

In one example, the first volatile solid organic compound is adamantane. In the technical field of the present application, adamantane is a representative material known as a volatile solid organic compound. Meanwhile, in the present application, when adamantane is applied as a volatile solid organic compound, only a single molecule thereof is applied, and other polymers or derivatives including the compound are not applied.

The type of the second volatile solid organic compound is not particularly limited as long as it satisfies the above-described vapor pressure and is different from the first volatile solid organic compound. As the second volatile solid organic compound, naphthalene, camphor, camphene, borneol or a combination thereof may be applied. On the other hand, it is preferable to apply borneol as the second volatile solid organic compound from the viewpoint of ensuring proper coatability and appropriately controlling the coating duration.

The type of the first solvent is not particularly limited. As the first solvent, it is sufficient as long as it can satisfy the above-described solubility for the first volatile solid organic compound and the second volatile solid organic compound. Meanwhile, from the viewpoint of securing compatibility with the first volatile solid organic compound and the second volatile solid organic compound, it may be advantageous to use alcohol as the first solvent. Alcohol, as is known, refers to an organic compound in which a hydroxyl group (-OH) is bonded to a carbon atom (R-OH, where R is a monovalent hydrocarbon functional group). Applying the alcohol as a solvent may mean applying a mixed solvent containing the alcohol as well as the alcohol itself.

The type of the second solvent is also not particularly limited. The second solvent is preferably one that can satisfy the solubility of the first volatile solid organic compound and the second volatile solid organic compound described above. Meanwhile, from the viewpoint of securing compatibility with the volatile solid organic compounds, it may be advantageous to use a hydrocarbon compound as the second solvent. The hydrocarbon compound applied as the second solvent may mean a compound composed only of carbon and hydrogen. The hydrocarbon compound may be an aliphatic or aromatic hydrocarbon, and if it is an aliphatic hydrocarbon, it may be a straight/branched chain hydrocarbon or a cyclic hydrocarbon. The number of carbon atoms of the hydrocarbon compound is also not particularly limited, and it is sufficient as long as it can be liquid at room temperature. For example, the number of carbon atoms of the hydrocarbon compound may be 4 or more, 6 or more, 8 or more, or 10 or more, and may be 20 or less, 15 or less, or 10 or less. As the second solvent, for example, a hydrocarbon compound such as pentane, hexane, cyclopentane or cyclohexane may be used.

A mixing ratio of the first solvent and the second solvent is also not particularly limited. For example, in the composition of the present application, the ratio (V2/V1) of the volume (V1) of the first solvent to the volume (V2) of the second solvent may be 1 to 40. The ratio, in another example, may be 1.3 or more, 1.5 or more, 1.7 or more, 1.9 or more, 2.1 or more, or 2.3 or more, and may be 35 or less, 30 or less, 25 or less, or 20 or less.

The mixing ratio of the first volatile solid organic compound and the second volatile solid organic compound is also not particularly limited. For example, the ratio (SW1/SW2) of the weight (SW1) of the first volatile solid organic compound to the weight (SW2) of the second volatile solid organic compound may be 0.04 to 12.5. The ratio, in another example, may be 0.10 or more, 0.15 or more, 0.20 or more, 0.25 or more, 0.30 or more, 0.35 or more, 0.40 or more, 0.45 or more, or 0.50 or more, and 12 or less, 11 or less, 10 or less, 9 or less, 8 or less, 7 or less, 6 or less, 5 or less, 4 or less, or 3 or less.

A mixing ratio of the first volatile solid organic compound and the second volatile solid organic compound to the first solvent and the second solvent, respectively, may also be appropriately adjusted.

The ratio (SW1/(V1+V2)) of the weight of the first volatile solid organic compound (SW1) to the total volume of the first solvent and the second solvent (V1+V1) is 0.01 g/mL to 0.125 g/mL can be The ratio may be, in another example, 0.1 g/mL or more, 0.2 g/mL or more, 0.3 g/mL or more, 0.4 g/mL or more, 0.5 g/mL or more, 0.6 g/mL or more, or 0.7 g/mL or more. and may be 0.120 g/mL or less, 0.115 g/mL or less, 0.110 g/mL or less, 0.105 g/mL or less, 0.100 g/mL or less, or 0.095 g/mL or less.

The ratio (SW2/(V1+V2)) of the weight of the second volatile solid organic compound (SW2) to the total volume of the first solvent and the second solvent (V1+V2) is 0.01 g/mL to 0.5 g/mL can be The ratio may be, in another example, 0.015 g/mL or more, 0.020 g/mL or more, 0.025 g/mL or more, 0.030 g/mL or more, and 0.45 g/mL or less, 0.40 g/mL or less, 0.35 g/mL or less. or less, 0.30 g/mL or less, 0.25 g/mL or less, 0.20 g/mL or less, or 0.15 g/mL or less.

By appropriately adjusting the mixing ratio of the first volatile solid organic compound and the second volatile solid organic compound to the first solvent and the second solvent, respectively, the coating duration can be adjusted. If the size of the coating target of the level of everyday goods is not large, a coating composition having a duration of at least 10 minutes or more can be prepared because a long coating time is not required. On the other hand, in the case of a large-sized coating target for automobiles, ships, living spaces, etc., it is possible to prepare a coating composition having a duration of up to 24 hours or more. As such, the spray coating composition for 3D scan of the present application can be manufactured at various mixing ratios so that an operator can directly select a coating solution having an appropriate coating duration according to the type of coating target and operation.

It is preferable that the total content of the volatile solid organic compound is also appropriately adjusted. If the content is too small, proper coating properties or scanning performance may not be implemented, and if the content is too large, they form a solid content, which may cause clogging of the injection port of the injection device to which the composition is applied. For example, the total content of the first volatile solid organic compound and the second volatile solid organic compound may be 1 wt% to 50 wt%. For example, 1 wt% to 48 wt%, 1 wt% to 45 wt%, 1 wt% to 40 wt%, 1 wt% to 30 wt%, 1 wt% to 20 wt%, 1 wt% to 10 wt% %, 10% to 50%, 20% to 50%, 30% to 50%, 40% to 50%, 20% to 40%, 20% to 30%, 30% to 40% by weight. The content is based on the total weight of the composition.

An ultrasonic disperser, a ball mill, a mixer, etc. may be additionally used in order to improve the dispersion degree of the above-described solids. Such a mechanism is not particularly limited, and any mechanism capable of improving the dispersibility of the solid content is applicable.

The present application also relates to the use of the composition. The composition can be used for 3D scanning. Specifically, the composition may be applied to the surface of a material to be scanned in 3D scanning. As a method of application, a spray method may be applied. Accordingly, the present application, in another aspect, is a spray mixture for 3D scanning. The mixture comprises the composition and a spray gas.

"Spray gas" refers to a gas used in an injection device, referred to as a spray, and means a gas (gas) capable of providing a driving force for spraying (or ejecting) the contents in a container. As long as such gas is known in the technical field of the present application, the type thereof is not particularly limited. For example, the spray gas may be liquefied petroleum gas, nitrogen, argon, or a mixture thereof.

The present application also includes a container for spraying; And it relates to a spray device for 3D scanning containing the above-described spray mixture for 3D scanning in the liquid contained in the container.

In the present application, the term "spray container" refers to a container used in a spraying device referred to as a spray, and includes a container for accommodating the contents in the container and an outlet for spraying or discharging the contents, that is, a nozzle.

Also includes a form in which the above-described liquid coating composition and spray gas of the present application are separated and accommodated. Specifically, the spray apparatus for 3D scanning includes a spray container including a first accommodating part and a second accommodating part; a coating composition in a liquid state contained in the first receptacle; and a spray gas accommodated in the second accommodating part.

In one example, the spray gas may be one selected from the group consisting of liquefied petroleum gas, nitrogen and argon.

By using the above-described spray device, it is possible to spray the contents including the coating composition on the 3D scan object. Through this spraying, a coating layer is formed on the surface of the 3D scan object. The coated surface may have a thickness of 1 to 100 μm, and optical properties of the coated surface may vary depending on the thickness.

Hereinafter, the present application will be described in detail through examples. However, the scope of the present application is not limited by the following examples.

Information on the compounds and equipment used in the examples of the present application is as follows.

First volatile solid organic compound: adamantane (vapor pressure at 25° C.: 0.88 mmHg)

Second volatile solid organic compound: borneol (vapor pressure at 25° C.: 0.050 mmHg)

First solvent: ethanol

Second solvent: cyclopentane

The solubility of adamantane in ethanol is 0.0067 g/mL, and the solubility in cyclopentane is 0.1500 g/mL.

The solubility of borneol in ethanol is 0.7407 g/mL, and the solubility in cyclopentane is 0.2000 g/mL.

Specimen to be coated: Rectangular glass specimen of 75mmX25mm (WXW)

Transmittance measuring device: Shimaduz UV-2600

Transmittance measurement conditions: atmospheric pressure, 20℃

Experimental Example 1 to Experimental Example 6. Coating composition

A coating composition was prepared by adding the first volatile solid organic compound and the second volatile solid organic compound to 1 mL of the second solvent in the amounts shown in Table 1 below.

Experimental example first volatile solid organic compound (g) Second volatile solid organic compound (g) One 0.02 - 2 0.08 - 3 0.14 - 4 - 0.02 5 - 0.08 6 - 0.14

Immediately after coating 2mL of the coating composition of Experimental Examples 1 to 6 on the target specimen, the transmittance was measured, and the results are shown in FIG. 1 (Experimental Examples 1 to 3 are on the left, Experimental Examples 4 to 6 are shown on the right).

According to FIG. 1, in the coating composition of the present application, it can be seen that even if the solute is dissolved in a ratio of about 50% of the maximum solubility of the solute, it has excellent coating properties and has a low transmittance, so that it is suitable for scanning.

Experimental Example 7 and Experimental Example 8. Coating composition

0.28 g of each of the first volatile solid organic compound and the second volatile solid organic compound were added to 2 mL of the second solvent to prepare the coating compositions of Experimental Examples 7 and 8.

2mL of the coating composition of Experimental Examples 7 and 8 was coated on the target specimen, and then photographs were taken for each time period, and the results are shown in FIG. 2 (Experimental Example 7 at the top and Experimental Example 8 at the bottom).

Experimental Examples 9 to 14. Coating composition

As shown in Table 2 below, 0.16 g of the first volatile solid organic compound was added to a solvent in which the mixing ratio of the first solvent and the second solvent was adjusted to prepare a coating composition.

Experimental example First solvent (mL) Second solvent (mL) 9 0 2 10 0.1 1.9 11 0.2 1.8 12 0.3 1.7 13 0.4 1.6 14 0.6 1.4

2 mL of the coating composition of Experimental Examples 9 to 14 was coated on the target specimen, and then photographs were taken for each time period, and the results are shown in FIG. 3 . Referring to FIG. 3 , in Experimental Example 11, it was found that the coating composition evaporated and disappeared in less than 2 hours. Therefore, there is a disadvantage that the use time is too short. On the other hand, in Experimental Example 12, the coating composition remained even after 3 hours had elapsed, and it was found that it could be used for 2 hours longer than Experimental Examples 9 to 11, Experimental Examples 13 and 14. Experimental Examples 9 to The transmittance was measured immediately after coating 2 mL of the coating composition of Experimental Example 14 on the target specimen, and the results are shown in FIG. 4 .

According to FIG. 4, it can be seen that there is a difference in the transmittance of the coating layer and the coating duration according to the mixing ratio of the solvent. In addition, it was found that the solvent mixing ratio according to Experimental Example 12 was the optimal ratio as in the result of FIG. 3 .

Examples 1 to 5. Coating composition

A coating composition was prepared by adjusting the ratio of the first volatile solid organic compound and the second volatile solid organic compound to a solvent in which the first solvent and the second solvent were mixed in 0.3 mL and 1.7 mL, respectively, as shown in Table 3 below.

Example first volatile solid organic compound (g) Second volatile solid organic compound (g) One 0.16 0.06 2 0.16 0.12 3 0.16 0.18 4 0.16 0.24 5 0.16 0.30

On the other hand, although not shown separately, it was confirmed that up to 0.562 g of the second volatile solid compound per 1 mL of the mixed solvent as described above can be dissolved, and when the amount exceeds 0.3 g, the nozzle is clogged during the spraying process.

After coating 2mL of the coating composition of Examples 1 to 5 on the target specimen, pictures were taken for each time period, and the results are shown in FIG. 5 .

The transmittance was measured immediately after coating 2 mL of the coating composition of Examples 1 to 5 on the target specimen and after 2 hours, and the results are shown in FIG. 6 .

Examples 6 to 9. Coating Compositions

A coating composition was prepared by adjusting the ratio of the first volatile solid organic compound and the second volatile solid organic compound to a solvent in which the first solvent and the second solvent were mixed in 0.3 mL and 1.7 mL, respectively, as shown in Table 4 below.

Example first volatile solid organic compound (g) Second volatile solid organic compound (g) 6 0.15 0.25 7 0.17 0.23 8 0.18 0.22 9 0.19 0.21

After coating 2mL of the coating composition of Example 4 and Examples 6 to 9 on the target specimen, pictures were taken for each time period, and the results are shown in FIG. 7 .

The transmittance was measured immediately after coating 2mL of the coating composition of Example 4 and Examples 6 to 9 on the target specimen and after 2 hours and 3 hours, and the results are shown in FIG. 8 .

7 and 8, it can be seen that the coating composition according to Example 7 had the best coating properties, and the transmittance was less than 1% immediately after spraying, and the transmittance did not change significantly even after 2 hours had elapsed after spraying. (kept below 2%).

The preferred embodiments of the present application described above are disclosed for the purpose of illustration, and various modifications, changes, and additions may be made by those skilled in the art having ordinary knowledge of the present application within the spirit and scope of the present application, and such modifications, changes and additions shall be deemed to fall within the scope of the following claims.

Claims (16)

a first volatile solid organic compound, a second volatile solid organic compound, a first solvent and a second solvent;
the solubility of the first volatile solid organic compound in the first solvent is less than the solubility of the first volatile solid organic compound in the second solvent;
The vapor pressure of each of the first volatile solid organic compound and the second volatile solid organic compound is different from each other, and the spray coating composition for 3D scanning has a value in the range of 0.05 mmHg to 3.5 mmHg.
The method of claim 1,
A spray coating composition for 3D scanning wherein the solubility of the second volatile solid organic compound in the first solvent is greater than the solubility of the second volatile solid organic compound in the second solvent.
The method of claim 1,
The first volatile solid organic compound is adamantane spray coating composition for 3D scanning.
The method of claim 1,
wherein the second volatile solid organic compound is naphthalene, camphor, camphene, borneol, or a combination thereof.
The method of claim 1,
The first solvent is an alcohol spray coating composition for 3D scan.
The method of claim 1,
The second solvent is a hydrocarbon compound, a spray coating composition for 3D scanning.
The method of claim 1,
The ratio (V2/V1) of the volume (V1) of the first solvent and the volume (V2) of the second solvent is 1 to 40 in a spray coating composition for 3D scan.
The method of claim 1,
The ratio (SW1/SW2) of the weight of the first volatile solid organic compound (SW1) to the weight of the second volatile solid organic compound (SW2) is 0.04 to 12.5.
The method of claim 1,
The ratio (SW1/(V1+V2)) of the weight of the first volatile solid organic compound (SW1) to the total volume of the first solvent and the second solvent (V1+V1) is 0.01 g/mL to 0.125 g/mL A spray coating composition for 3D scanning.
The method of claim 1,
The ratio (SW2/(V1+V2)) of the weight of the second volatile solid organic compound (SW2) to the total volume of the first solvent and the second solvent (V1+V2) is 0.01 g/mL to 0.5 g/mL A spray coating composition for 3D scanning.
The method of claim 1,
The total content of the first volatile solid organic compound and the second volatile solid organic compound is 1% to 50% by weight of the spray coating composition for 3D scanning.
A spray mixture for 3D scanning comprising the coating spray coating composition for 3D scanning according to any one of claims 1 to 11 and a spray gas.
13. The method of claim 12,
The spray gas is liquefied petroleum gas, nitrogen, argon, or a mixture thereof for 3D scan spray mixture.
containers for spraying; and
A spray device for 3D scan containing the liquid contained in the container and the spray mixture for 3D scan of claim 12 .
a container for spraying including a first accommodating part and a second accommodating part;
The liquid contained in the first accommodation unit and the spray coating composition for 3D scan of any one of claims 1 to 11; and
A spray device for 3D scanning comprising a spray gas accommodated in the second accommodating part.
16. The method of claim 15,
The spray gas is one selected from the group consisting of liquefied petroleum gas, nitrogen and argon, a spray device for 3D scanning.

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