KR102554958B1 - Spray coating composition for 3D scanning - Google Patents

Abstract

This 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 the 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 {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, by spraying a solution containing a volatile solid organic compound and a liquid solvent to facilitate scanning, and the coating disappears by itself after a certain period of time. It relates to a spray coating composition for scanning and a mixture containing the same.

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

Data obtained from 3D scanners are widely applied not only in CAD, CAM, and CAE fields, but also in medical fields, 3D virtual reality, Web-3D, games, and animations.

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

In the case of cultural assets, a project to build a 3D digital cultural assets database through digitization is being actively carried out domestically. Recognizing the need for digitization of major domestic cultural assets, we are implementing a digital cultural heritage construction project using actual 3D scanning.

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

3D data is also used in replication. As an example of reproduction, an exhibition is held by lending records received by a public official during an overseas trip, but there are problems such as damage or loss of the original. As a way to solve this problem, 3D scanning is used to produce replicas, and the replicas are displayed.

The application of digital reproduction is actively progressing in the field of customized products considering the individual's body shape. In particular, application in functional shoe manufacturers is steadily increasing, and domestic shoe-related research institutes and companies are already conducting research related to custom shoe production.

As an example of surfacing work after scanning a human foot, it is possible to manufacture shoes that perfectly match 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 high-precision surgery is required, the surgeon's surgical glove must perfectly match the shape of the surgeon's hand. there is.

In the case of the United States, the application of digital reproduction in the medical field is indeed making remarkable progress. In particular, applications in the field of dentistry and artificial joints have passed the research stage and entered the maturity stage of providing actual services to patients. In addition, digital duplication technology is actively applied in the production of virtual models of the human body.

When scanning an object in such a 3D scan, if a part to be inspected by the object is transparent or mirror-like regular reflection or total reflection, an optical difficulty arises in which the 3D scanner cannot accurately recognize information about the object.

In order to solve the object recognition problem that can occur during 3D scanning of transparent glass or transparent acrylic such as crystal that passes without reflection, or high-gloss metal materials that can cause specular reflection, diffuse reflection or diffuse reflection is induced. There is a need to enable 3D scanners to collect surface information of objects.

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

With the rapid growth of the market, technology development for 3D printing is becoming active, but domestic research and development mainly focuses on 3D printers themselves, 3D printing materials, and software. The situation is.

However, some technologies have been proposed in response to this demand. In particular, a spray solution containing only inorganic particles or only surface-modified inorganic or organic particles in the spray gas has been developed, but this lacks adhesion and coating power between the substrate and the coating surface, resulting in waste of the coating solution or coating The surface has an uneven surface.

In addition, in order to facilitate 3D scanning, a developer containing a large number of toxic substances is used, which causes harmfulness and danger. Conventional 3D scan-only sprays sold on the market have the disadvantage of being expensive because they are manufactured overseas, and have the disadvantage of requiring a secondary operation to remove the coating surface after scanning.

In addition, depending on the solution, when used after long-term storage, the dispersion of the particles in the solution decreases, causing clogging of the spray nozzle and deterioration of coating performance including uniformity of the coating surface.

Therefore, it is the time when an in-depth study on a coating composition capable of solving these problems is required.

The present application aims to provide a coating composition for 3D scanning that improves the coating power of the coating layer for 3D scanning, removes the coating by itself after a certain period of time after spray coating, and maintains the coating performance even after long-term storage.

In addition, the present application is intended to provide a spray mixture and apparatus for 3D scanning that can adjust the coating duration in various ways by adjusting the composition ratio of the coating composition for 3D scanning.

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, wherein the solubility of the first volatile solid organic compound in the first solvent is It is less than the solubility of the volatile solid organic compound in the second solvent, and the vapor pressures of the first volatile solid organic compound and the second volatile solid organic compound are different from each other and have a value within the range of 0.05 mmHg to 3.5 mmHg for 3D scanning. It relates to spray coating compositions.

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 and the volume (V2) of the second solvent may be 1 to 40.

In one example, a ratio (SW1/SW2) of the weight of the first volatile solid organic compound (SW1) and the weight of the second volatile solid organic compound (SW2) 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 (V1+V1) of the first solvent and the second solvent (SW1/(V1+V2)) 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 (V1+V2) of the first solvent and the second solvent (SW2/(V1+V2)) is 0.01 g/mL to 0.5 g/mL.

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

Another aspect of the present application relates to a spray mixture for 3D scanning comprising the coating spray coating composition for 3D scanning 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 a spray device for 3D scanning comprising the spray mixture for 3D scanning in a liquid state accommodated in the container.

Another aspect of the present application is a spray container comprising a first accommodating portion and a second accommodating portion; a liquid state accommodated in the first accommodating portion and the spray coating composition for 3D scanning; And it relates to a spray device for 3D scanning containing a spray gas accommodated in the second accommodating portion.

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 can be uniformly applied to the 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.

1 is transmittance of specimens 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 composition of Experimental Example 7 and Experimental Example 8.
3 is a photograph of specimens taken after coating the coating compositions 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 specimens taken after coating the coating compositions 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 specimens taken after coating the coating compositions of Examples 4 and 6 to 9.
8 is a photograph of specimens taken after coating the coating compositions of Examples 4 and 6 to 9.

Since the present application can make various changes and have various embodiments, specific embodiments are illustrated and described in the drawings.

However, this is not intended to limit the present application to specific embodiments, and 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 related known technologies may obscure the gist of the present application, the detailed description will be omitted.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. Terms are only used to distinguish one component from another.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present application. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as "comprise" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Therefore, since the configurations shown in the embodiments described in this specification are only one of the most preferred embodiments of the present application and do not represent all of the technical ideas of the present application, various equivalents that can replace them at the time of the present application and variations may exist.

In addition, it should be understood that the accompanying drawings in this 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 scanning 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 types of volatile solid organic compounds and at least two types 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, that is, capable of sublimation.

"Normal temperature" means a natural temperature that is not particularly heated or cooled. 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 are different from each other. Usually, since the degree of sublimation of a 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 scanning of the present application have a vapor pressure 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. By applying a plurality of different volatile solid organic compounds having a vapor pressure within the above range, excellent coating properties can be secured, and the coating duration can be adjusted according to the purpose.

The vapor pressure, in another example, may be 0.055 mmHg or more, 0.06 mmHg or more, or 0.065 mmHg or more, and may be 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 below the above range, the time required to maintain the state after the composition is coated (hereinafter also referred to as "residence time") to a desired level. For example, when a volatile solid organic compound (eg, cyclododecane known to have a vapor pressure of 0.004 mmHg at 25 ° C.) having a vapor pressure less than the above range is applied, the duration is excessively increased even in a very small amount. It is necessary to control the content of the ingredients very delicately, which is usually not easy. The same applies to the case where a volatile solid organic compound having a vapor pressure exceeding the above range is applied.

The first solvent and the second solvent have different solubilities 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 solvents having different solubilities as described above, appropriate miscibility for the first volatile solid organic compound and the second volatile solid organic compound can 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, 0.001 g/mL or more, 0.002 g/mL 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. The solubility of the first volatile solid organic compound in the second solvent is, in another example, 0.06 g/mL or more, 0.07 g/mL or more, 0.08 g/mL or more, 0.09 g/mL or more, or 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.

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

A solubility of the second volatile solid organic compound in the second solvent may be 0.3 g/mL or less. The solubility of the second volatile solid organic compound in the second solvent is, in another example, 0.29 g/mL or less, 0.28 g/mL or less, 0.27 g/mL or less, 0.26 g/mL or less, or 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 may be 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 this application, adamantane is representative of what is known as a volatile solid organic compound. Meanwhile, in the present application, the application of adamantane as a volatile solid organic compound means that only a single molecule thereof is applied, not other polymers or derivatives containing the compound.

The type of the second volatile solid organic compound is not particularly limited as long as it satisfies the above-mentioned vapor pressure and is different from the first volatile solid organic compound. Naphthalene, camphor, camphene, borneol, or a combination thereof may be used as the second volatile solid organic compound. On the other hand, it is preferable to apply borneol as the second volatile solid organic compound from the viewpoint of securing appropriate coating properties and appropriately adjusting the duration of coating.

The type of the first solvent is not particularly limited. As the first solvent, it is sufficient if it can satisfy the above-mentioned solubility of the first volatile solid organic compound and the second volatile solid organic compound. Meanwhile, in terms of ensuring 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 alcohol as a solvent may mean applying not only the alcohol itself but also a mixed solvent containing the alcohol.

The type of the second solvent is not particularly limited either. The second solvent is preferably any one capable of satisfying the solubility of the first volatile solid organic compound and the second volatile solid organic compound. Meanwhile, in terms 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 carbon number of the hydrocarbon compound is also not particularly limited, and it is sufficient as long as it can become a liquid at room temperature. For example, the carbon number 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.

The 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 and the volume (V2) of the second solvent may be 1 to 40. In another example, the ratio 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.

A mixing ratio of the first volatile solid organic compound and the second volatile solid organic compound is also not particularly limited. For example, a 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) may be 0.04 to 12.5. In another example, the ratio 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 It may be 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 may also be appropriately adjusted.

The ratio (SW1/(V1+V2)) of the weight (SW1) of the first volatile solid organic compound to the total volume (V1+V1) of the first solvent and the second solvent is 0.01 g/mL to 0.125 g/mL can be In another example, the ratio may be 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. 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 (SW2) of the second volatile solid organic compound to the total volume (V1+V2) of the first solvent and the second solvent is 0.01 g/mL to 0.5 g/mL can be In another example, the ratio may be 0.015 g/mL or more, 0.020 g/mL or more, 0.025 g/mL or more, 0.030 g/mL or more, 0.45 g/mL or less, 0.40 g/mL or less, or 0.35 g/mL 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.

The coating duration may be adjusted by properly 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. When the size of the coating target at the level of everyday items is not large, a coating composition having a duration of at least 10 minutes or more can be prepared because there is no need for a long coating time. On the other hand, in the case of large-sized coating targets such as automobiles, ships, and living spaces, a coating composition having a duration of up to 24 hours or more can be prepared. As such, the spray coating composition for 3D scanning of the present application can be prepared in various mixing ratios so that the operator can directly select a coating solution having an appropriate coating duration according to the type of coating target and work.

It is preferable that the total content of the volatile solid organic compounds is also appropriately controlled. If the content is too small, appropriate coating properties or scanning performance may not be implemented, and if the content is too large, they may form solids and clog the nozzle of the injection device for applying the composition. For example, the total amount of the first volatile solid organic compound and the second volatile solid organic compound may be 1% to 50% by weight. For example, 1% to 48%, 1% to 45%, 1% to 40%, 1% to 30%, 1% to 20%, 1% to 10% by weight. %, 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, or the like may be additionally used to improve the dispersion of the above-described solid content. Such a mechanism is not particularly limited, and any mechanism capable of improving the dispersion of solids can be applied.

This application also relates to the use of said 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 is, in another aspect, a spray mixture for 3D scanning. The mixture includes the composition and the spray gas.

"Spray gas" is a gas used in a spraying 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. The kind of gas is not particularly limited as long as it is known in the art of the present application. For example, the spray gas may be liquefied petroleum gas, nitrogen, argon or a mixture thereof.

This application also provides a container for spraying; And it relates to a spray device for 3D scanning containing the above-described spray mixture for 3D scanning in a liquid state accommodated in the container.

In this application, "a container for spraying" is a container used in a spraying device referred to as a spray, and means a container including a receiving part for accommodating the contents in the container and an outlet or nozzle for spraying or discharging the contents.

The present application also includes a form in which the above-described liquid coating composition and the spray gas are separated and accommodated. Specifically, the spray device for 3D scanning includes a spray container including a first accommodating part and a second accommodating part; a coating composition which is liquid and contained in the first accommodating portion; and the spray gas accommodated in the second accommodating portion.

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

Using the aforementioned spray device, the content including the coating composition may be sprayed onto the 3D scan object. Through this spraying, a coating layer is formed on the surface of the 3D scan object. The thickness of the coated surface can be made from 1 to 100 μm, and the optical properties of the coated surface can vary depending on the thickness.

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

Information on compounds and equipment used in the examples of the present application are 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: 75mmX25mm (width X width) rectangular glass specimen

Transmittance measurement equipment: UV-2600 from Shimaduz

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 Figure 1 (Experimental Examples 1 to 3 are on the left, Experimental Examples 4 to 6 are shown on the right).

According to FIG. 1, it can be seen that in the coating composition of the present application, even when the solutes are dissolved at a rate of about 50% of the maximum solubility of the solute, it has excellent coating properties and low transmittance, making it suitable for scanning.

Experimental Example 7 and Experimental Example 8. Coating composition

Coating compositions of Experimental Examples 7 and 8 were prepared by adding 0.28 g of each of the first volatile solid organic compound and the second volatile solid organic compound to 2mL of the second solvent.

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

Experimental Example 9 to Experimental Example 14. Coating composition

As shown in Table 2 below, a coating composition was prepared by adding 0.16 g of the first volatile solid organic compound to a solvent having an adjusted mixing ratio of the first solvent and the second solvent.

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

2mL of the coating compositions of Experimental Examples 9 to 14 were coated on target specimens, and then pictures 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 volatilized and disappeared within 2 hours. Therefore, there is a disadvantage in that the use time is too short. On the other hand, in Experimental Example 12, the coating composition remained even after 3 hours, and it was found that the coating composition could be used for 2 more hours compared to Experimental Examples 9 to 11, Experimental Examples 13 and 14. The transmittance was measured immediately after coating the target specimen with 2 mL of the coating composition of Experimental Example 14, 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, as in the result of FIG. 3, it was found that the solvent mixing ratio according to Experimental Example 12 was the optimal ratio.

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 at 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 the second volatile solid compound can be dissolved at a maximum of 0.562 g per 1 mL of the solvent mixed as described above, and when the amount exceeds 0.3 g, the nozzle is clogged during the spraying process.

2mL of the coating composition of Examples 1 to 5 was coated on the target specimen, and then 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 compositions 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 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 at 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

2 mL of the coating compositions of Examples 4 and 6 to 9 were coated on target specimens, and then photographs were taken at different times, and the results are shown in FIG. 7 .

The transmittance was measured immediately after coating the target specimen with 2 mL of the coating compositions of Examples 4 and 6 to 9 and after 2 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 has the best coating properties, and the transmittance is less than 1% immediately after spraying, and the transmittance does not change significantly even after 2 hours have elapsed after spraying. (kept below 2%).

Preferred embodiments of the present application described above are disclosed for illustrative purposes, and those skilled in the art having ordinary knowledge of the present application will be able to make various modifications, changes, and additions within the spirit and scope of the present application, and such modifications and changes and additions should be viewed as falling 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 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,
The ratio (SW1/SW2) of the weight of the first volatile solid organic compound (SW1) and the weight of the second volatile solid organic compound (SW2) (SW1/SW2) is 0.04 to 12.5,
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 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 ratio (V2 / V1) of the volume (V1) of the first solvent and the volume (V2) of the second solvent is 1 to 40 spray coating composition for 3D scanning.
delete According to claim 1,
The first volatile solid organic compound is adamantane spray coating composition for 3D scanning.
According to claim 1,
Wherein the second volatile solid organic compound is naphthalene, camphor, camphor, borneol, or a combination thereof.
According to claim 1,
The first solvent is an alcohol spray coating composition for 3D scanning.
According to claim 1,
The second solvent is a hydrocarbon compound spray coating composition for 3D scanning.
delete delete According to claim 1,
The ratio (SW1/(V1+V2)) of the weight (SW1) of the first volatile solid organic compound to the total volume (V1+V1) of the first solvent and the second solvent is 0.01 g/mL to 0.125 g/mL A spray coating composition for phosphorus 3D scanning.
According to claim 1,
The ratio (SW2/(V1+V2)) of the weight (SW2) of the second volatile solid organic compound to the total volume (V1+V2) of the first solvent and the second solvent is 0.01 g/mL to 0.5 g/mL A spray coating composition for phosphorus 3D scanning.
According to claim 1,
The total amount 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, 3 to 6, and 9 to 11 and a spray gas.
According to claim 12,
The spray gas is liquefied petroleum gas, nitrogen, argon, or a mixture of these spray mixtures for 3D scanning.
containers for spraying; and
A spray device for 3D scanning comprising the liquid contained in the container and the spray mixture for 3D scanning of claim 12.
A spray container comprising a first accommodating part and a second accommodating part;
The spray coating composition for 3D scanning according to any one of claims 1, 3 to 6, and 9 to 11, which is a liquid contained in the first accommodating part; and
A spray device for 3D scanning containing a spray gas accommodated in the second accommodating part.
According to claim 15,
Wherein the spray gas is one selected from the group consisting of liquefied petroleum gas, nitrogen and argon.

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