Super-granulation watercolor paint

Abstract

A super-granulation watercolor paint according to the present invention includes two types of watercolor paints having specific compositions, thus having the effect of being excellent in granular texture expression.

Description

Super Granulation Watercolor Paint

[0001] The present invention relates to a super granulation watercolor paint with excellent granular texture.

[0002]

[0003] Generally, paints with excellent particle texture are primarily used in watercolors, which allow for the realization of textures or interesting visual effects in paintings. These paints can provide various particle texture effects depending on the size and shape of the pigment particles. Specifically, super-granulation watercolors feature large particles that are evenly dispersed, which can create an effect where particles gather in the painted areas to emphasize the particle texture. This allows for the visual representation of texture or particle movement, adding interesting visual elements to the artwork. It is particularly useful when painting natural landscapes or subjects with a high concentration of particles, such as stones, sand, and clouds.

[0004] The composition of watercolor paint typically includes pigment, binder, and solvent (water), and inorganic or organic pigments may be used as the pigment. In particular, since inorganic pigments exist in a particulate state, general watercolor paints using inorganic pigments can have a granular texture, but conventional watercolor paints using inorganic pigments had clear limitations in precisely expressing the granular texture of the subject.

[0005] Despite the long history of paints, various advanced technologies are required to improve the performance of super granulation paints, such as requiring precise control of particle size and excellent dispersion of particles in water to effectively represent this granular texture.

[0006]

[0007] [Prior Art Literature]

[0008] [Patent Literature]

[0009] Korean Registered Patent Publication No. 10-1238660 (February 25, 2013)

[0010]

[0011] The objective of the present invention is to provide a super granulation watercolor paint with excellent granular texture expression.

[0012]

[0013] The present invention provides a super granulation watercolor paint that uses a mixture of a first watercolor paint and a second watercolor paint. Herein, the first watercolor paint comprises a first inorganic pigment particle containing a metal oxide particle, polylysine, a binder, and water, and the second watercolor paint comprises a second inorganic pigment particle containing a magnesium oxide particle and a tourmaline particle, a binder, and water.

[0014] In one example of the present invention, the first inorganic pigment particle is a surface-modified particle in which the polylysine is surface-treated on the metal oxide particle, and the surface-modified particle may be a metal oxide particle surface-treated with polylysine.

[0015] In one example of the present invention, the surface-modified particles may be prepared by including a) a mixing step of mixing metal oxide particles and polylysine in an aqueous medium and b) a drying step of evaporating the aqueous medium so that the polylysine is adsorbed onto the surface of the metal oxide particles.

[0016] In one example of the present invention, in step a), the mixing weight ratio of the metal oxide particles and the polylysine may be 100:0.001 to 10.

[0017] In one example of the present invention, step b) may include a process of obtaining the metal oxide particles from the aqueous medium and then drying them at 70 to 150°C.

[0018] In one example of the present invention, the polylysine may include one or more selected from poly-L-lysine, poly-D-lysine, ε-poly-L-lysine and ε-poly-D-lysine.

[0019] In one example of the present invention, the magnesium oxide particles may be Pickering inorganic powders having an average particle size of 50 to 300 nm and having a surfactant ability based on Pickering emulsion.

[0020] In one example of the present invention, the average particle size of the first inorganic pigment particle and the second inorganic pigment particle may be 1 to 100 μm independently of each other.

[0021] In one example of the present invention, the particle size ratio of the first inorganic pigment particle and the second inorganic pigment particle may be 10:1 to 5.

[0022] In one example of the present invention, the first watercolor paint may comprise 5 to 30 weight% of the first inorganic pigment particles, 40 to 80 weight% of the binder, and 3 to 30 weight% of the water, and the second watercolor paint may comprise 1 to 10 weight% of the magnesium oxide particles, 5 to 30 weight% of the second inorganic pigment particles, 40 to 80 weight% of the binder, and 3 to 30 weight% of the water.

[0023] In one example of the present invention, the mixing weight ratio of the first watercolor paint and the second watercolor paint may be 1:0.5 to 2.

[0024] In one example of the present invention, the first watercolor paint and the second watercolor paint may each be prepared by separately ultrasonically dispersing and mixing their respective components.

[0025] In one example of the present invention, in the first watercolor paint, the metal of the metal oxide particles may include one or more selected from Zn (zinc), Pb (lead), Ti (titanium), Fe (iron), Cr (chromium), V (vanadium), Co (cobalt), Mg (magnesium), and Al (aluminum).

[0026] In one example of the present invention, in the first watercolor paint or the second watercolor paint, the binder may include one or more selected from mineral binders, synthetic binders, and natural resin binders, the mineral binder may include one or more selected from malachite, silica, bentonite, vermiculite, zeolite, illite, and kaolinite, the synthetic binder may include one or more selected from acrylic resin, vinyl acetate resin, and alkyl resin, the natural resin binder may include one or more selected from gum arabic and guar gum.

[0027]

[0028] The super granulation watercolor paint according to the present invention has an excellent effect of expressing granular texture.

[0029]

[0030] Figure 1 is an image of a super granulation watercolor paint prepared according to Example 6 applied to paper using a brush and then dried.

[0031]

[0032] The super granulation watercolor paint according to the present invention will be described in detail below with reference to the attached drawings.

[0033] The drawings described in this specification are provided as examples to ensure that the concept of the present invention is sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented and may be embodied in other forms, and the drawings may be exaggerated to clarify the concept of the present invention.

[0034] Unless otherwise defined, technical and scientific terms used in this specification have the meanings commonly understood by those skilled in the art to which this invention pertains, and descriptions of known functions and configurations that could unnecessarily obscure the essence of the invention are omitted in the following description and accompanying drawings.

[0035] In some cases in this specification, known structures and devices may be omitted or illustrated in the form of block diagrams focusing on the core functions of each structure and device to avoid obscuring the concept of the invention.

[0036] As used in this specification, "comprising" is an open description equivalent to expressions such as "comprising," "containing," "having," and "characteristics," and does not exclude elements, materials, or processes not additionally listed.

[0037] Unless otherwise specifically indicated, the singular form of a term used in this specification may be interpreted to include the plural form.

[0038] The numerical ranges used in this specification include lower and upper limits and all values ​​within the range, increments logically derived from the form and width of the defined range, all of which are limited values, and all possible combinations of upper and lower limits of numerical ranges defined in different forms. Additionally, unless specifically defined in the specification of this invention, values ​​outside the numerical range that may occur due to experimental error or rounding are also included in the defined numerical ranges.

[0039] In this specification, the unit '%' used without special mention means 'weight%' unless otherwise defined.

[0040]

[0041] In order to create precise and delicate paintings, the selection of colors is important, but it is also very important to express textures that cannot be expressed by color alone. In particular, there are limitations to the artist's skill alone in realizing the texture of granule patterns, and intricate granule patterns can be expressed in the painting by ensuring that the paint itself has a composition and ratio capable of representing granule patterns.

[0042] Accordingly, the present invention provides a super granulation watercolor paint capable of implementing a super granule pattern.

[0043] The super granulation watercolor paint according to the present invention comprises a first watercolor paint and a second watercolor paint, and a super granule pattern can be realized by mixing and using the first watercolor paint and the second watercolor paint. The super granulation watercolor paint is manufactured by mixing the corresponding components described below into the first watercolor paint and the second watercolor paint, respectively, and a super granule pattern can be realized by mixing and using them manually, such as by using a brush.

[0044] The first watercolor paint comprises a first inorganic pigment particle containing a metal oxide particle; polylysine; a binder; and water; and the second watercolor paint comprises a second inorganic pigment particle containing a magnesium oxide particle; a tourmaline particle; a binder; and water.

[0045] In the present invention, the first watercolor paint contains polylysine, which can reduce the clumping of particles dispersed in water and has the effect of expressing the texture of the granule pattern more uniformly and better.

[0046] In particular, when the polylysine is used as a surface-modified particle with the polylysine surface-treated on the metal oxide particle, rather than simply mixed with other components, that is, when a surface-modified particle in which the polylysine surface-treated metal oxide particle is used, the clumping of each particle dispersed in water can be minimized, and the texture of the granule pattern can be expressed more uniformly and very well.

[0047] A method for surface-treating the above-mentioned metal oxide particles with the above-mentioned polylysine, that is, a method for manufacturing the above-mentioned surface-modified particles, preferably comprises a) a mixing step of mixing the metal oxide particles and the polylysine in an aqueous medium, and b) a drying step of evaporating the aqueous medium so that the polylysine is adsorbed onto the surface of the above-mentioned metal oxide particles.

[0048] In step a) above, the mixing weight ratio of the metal oxide particles and the polylysine is preferably such that the polylysine is maximally adsorbed onto the entire surface of the metal oxide particles, and may be, for example, 100:0.001 to 10.

[0049] The drying in step b) above may include, for example, a drying process after obtaining the metal oxide particles from the aqueous medium, to the extent that the polylysine can be well attached to the surface of the metal oxide particles. In this case, it may be preferable to perform the drying at a high temperature of 70 to 150°C.

[0050] The above polylysine may be any polylysine isomer of various isomers and may include one or more selected from, for example, poly-L-lysine, poly-D-lysine, ε-poly-L-lysine and ε-poly-D-lysine.

[0051] The weight-average molecular weight of the above polylysine may preferably be, for example, 100,000 to 500,000 g / mol, specifically 150,000 to 300,000 g / mol.

[0052] In a preferred example, the magnesium oxide particles may be Pickering inorganic powders having a Pickering emulsion-based surfactant ability, with an average particle size of 50 to 300 nm, specifically 50 to 150 nm, more specifically 50 to 100 nm. The Pickering inorganic powders possess surfactant properties based on Pickering emulsion technology, i.e., depletion force, thereby enabling better mixing and dispersion between water and non-hydrophilic components (or components with poor hydrophilic properties), and significantly improving dispersion stability over a long period. When the magnesium oxide particles have an average particle size of 50 to 300 nm, specifically 50 to 150 nm, more specifically 50 to 100 nm, they may function as Pickering inorganic powders within the specific composition of the watercolor paint according to the present invention and the specific composition ratio described below. As a preferred example, the Pickering inorganic powder is preferably classified and used such that at least 70% of the total inorganic powder has a particle size distribution of 50 to 100 nm, and in one example, at least 80% has a particle size of 60 to 80 nm.

[0053] It may be desirable for the average particle size of the first inorganic pigment particle and the second inorganic pigment particle to be independently 1 to 100 μm in terms of improving the texture characteristics of the granule pattern. In this case, when the ratio of the particle sizes of the first inorganic pigment particle and the second inorganic pigment particle is 10:1 to 5, it is effective in terms of having excellent dispersibility while significantly improving the texture characteristics of the granule pattern.

[0054] It is preferable that the first watercolor paint comprises 5 to 30 weight% of the first inorganic pigment particles, 40 to 80 weight% of the binder, and 3 to 30 weight% of the water. Additionally, it is preferable that the second watercolor paint comprises 1 to 10 weight% of the magnesium oxide particles, 5 to 30 weight% of the second inorganic pigment particles, 40 to 80 weight% of the binder, and 3 to 30 weight% of the water.

[0055] As described above, the super granulation watercolor paint according to the present invention can realize a super granule pattern by a user mixing and using the first watercolor paint and the second watercolor paint, which are manufactured separately. Specifically, it is preferable that the first watercolor paint and the second watercolor paint are each manufactured by separately ultrasonically dispersing and mixing their respective components. The ultrasonically dispersing utilizes ultrasound to ensure that the particulate components among the components are well dispersed in a medium. At this time, the specific operating conditions for ultrasonically dispersing may be, for example, a frequency of 20 to 100 kHz, a power of 100 to 500 W, and a dispersing time of 0.1 to 1 hour.

[0056] The mixing weight ratio of the first watercolor paint and the second watercolor paint may preferably be 1:0.5 to 2, specifically 1:0.7 to 1.5.

[0057] The above metal oxide particles refer to metal oxide particles capable of realizing color as inorganic pigments. As a specific example, the metal of the metal oxide particles may include one or more selected from Zn (zinc), Pb (lead), Ti (titanium), Fe (iron), Cr (chromium), V (vanadium), Co (cobalt), Mg (magnesium), and Al (aluminum). Since more specific compound names of the metal oxides are widely known, it is acceptable to refer to the known literature.

[0058] In the present invention, tourmaline particles are used as a second inorganic pigment and, when combined with the components according to the present invention, can produce a subtle, clear, and clean color, and in particular, have the effect of maximizing the expression of granular texture. These tourmaline particles can be manufactured by processing in various ways, and, for example, the color can be controlled through firing at high temperatures.

[0059] In the first watercolor paint or the second watercolor paint, the binder may include one or more selected from mineral binders, synthetic binders, and natural resin binders. The mineral binder may include one or more selected from malachite, silica, bentonite, vermiculite, zeolite, illite, and kaolinite. The synthetic binder may include one or more selected from acrylic resin, vinyl acetate resin, and alkyl resin, and the natural resin binder may include one or more selected from gum arabic and guar gum. The weight-average molecular weight of the resin may be 10,000 to 500,000, for example, by referring to known literature used as a binder in the paint field.

[0060] In one example of the present invention, the first watercolor paint or the second watercolor paint may further include an organic pigment, in which case it may be used in an amount of 1 to 20 weight%, specifically 1 to 15 weight%, based on the total weight of the paint. As a specific example of the organic pigment, it may include one or more selected from azo compounds, quinone compounds, indigo compounds, perylene compounds, and quinacridone compounds.

[0061] In one example of the present invention, the first watercolor paint or the second watercolor paint may further include an additive to improve physical properties, processability, workability, and storage stability. In this case, the additive may be used in an amount of 0.01 to 5 weight%, specifically 0.1 to 3 weight%, based on the total weight of the paint. As for the types of the additive, one or more selected from storage stability enhancers, processability enhancers, viscosity modifiers, drying modifiers, oxidizers, defoaming agents, plasticizers, light stabilizers, anti-friction agents, anti-stain agents, etc., may be used.

[0062]

[0063] The present invention will be described in detail below through examples, but these are intended to explain the invention in more detail and the scope of the present invention is not limited by the following examples.

[0064]

[0065] [Example 1]

[0066] Super Granulation Watercolor Paint Manufacturing Process

[0067] The first watercolor paint and the second watercolor paint were prepared by mixing each component in the composition ratio of Table 1 below using an ultrasonic disperser (frequency: 100 kHz, power: 200 W) for 30 minutes, and then the first watercolor paint and the second watercolor paint were mixed manually using a brush in a weight ratio of 1:1 to prepare a super granulation watercolor paint.

[0068]

[0069] Composition Content (wt%) 1st Watercolor Paint 1st Inorganic Pigment Particles Cobalt-Aluminum Oxide (CoAl2O4) Particles 14 Average Particle Size: 20 µm Binder Mission Watercolor Binder (FM-500, Mijello) 75 Polylysine 1 Water 10 Total 100 2nd Watercolor Paint Magnesium Oxide Particles Average Particle Size: 5 µm 3 2nd Inorganic Pigment Particles Tourmaline Particles 17 Average Particle Size: 20 µm Binder Mission Watercolor Binder (FM-500, Mijello) 70 Water 10 Total 100

[0070]

[0071] [Example 2]

[0072] Super granulation watercolor paint was prepared in the same manner as in Example 1, except that polylysine was not simply mixed and used in Example 1, but rather polylysine was surface-treated (surface-modified particles) onto cobalt-aluminum oxide (CoAl2O4) particles by the following method.

[0073] Surface modification particles

[0074] Cobalt-aluminum oxide (CoAl2O4) particles with an average particle size of 20 μm were added to an aqueous polylysine solution (poly-L-lysine, weight-average molecular weight: 150,000–300,000, concentration: 0.1 wt%) (P8920, Sigma Aldrich), stirred at 2,000 rpm at 25°C for 30 minutes, and then dried sufficiently at 80°C to produce surface-modified particles, which are surface-treated cobalt-aluminum oxide particles. At this time, the weight ratio of the cobalt-aluminum oxide particles to the aqueous polylysine solution was set to 1:10.

[0075] Super granulation watercolor paint was prepared in the same manner as in Example 1, except that the surface-modified particles prepared in this manner were replaced with the first inorganic pigment particles of Example 1, and polylysine was not simply mixed and used. At this time, the surface-modified particles were used with an increased content equal to the amount of polylysine (1 wt%) used in Example 1 (surface-modified particle content: 15 wt%).

[0076]

[0077] [Example 3]

[0078] Super granulation watercolor paint was prepared in the same manner as in Example 2, except that the following Pickering inorganic powder was used instead of magnesium oxide particles in Example 2.

[0079] <Pickering Inorganic Powder Manufacturing Process>

[0080] Magnesium oxide (MgO) particles were ground using an ultrafine grinder to produce fine powder, and Pickering inorganic powder was produced by classifying the particles to have an average particle size of 70 nm and a particle size distribution in which more than 80% had a particle size of 60 to 80 nm.

[0081]

[0082] [Examples 4~8]

[0083] Super granulation watercolor paints were each prepared in the same manner as in Example 3, except that the average particle size of the second inorganic pigment particles in Example 3 was changed from 20 μm to 1, 2, 6, 10, and 12 μm.

[0084]

[0085] [Comparative Example 1]

[0086] Super granulation watercolor paint was prepared in the same manner as in Example 1, except that polylysine was not used among the components of the first watercolor paint in Example 1. At this time, the content of the first inorganic pigment particles was increased by the amount of polylysine used in Example 1 (1 wt%) (content of first inorganic pigment particles used: 15 wt%).

[0087]

[0088] [Comparative Example 2]

[0089] Super granulation watercolor paint was prepared in the same manner as in Example 1, except that magnesium oxide particles were not used among the components of the second watercolor paint in Example 1. At this time, the content of the second inorganic pigment particles was increased by the amount of magnesium oxide particles used in Example 1 (3 wt%) (content of second inorganic pigment particles used: 17 wt%).

[0090]

[0091] [Comparative Example 3]

[0092] Super granulation watercolor paint was prepared in the same manner as in Example 3, except that all the ingredients in Table 1 above were mixed all at once for 30 minutes using an ultrasonic disperser.

[0093]

[0094] [Experimental Example 1] Comparison Test of Granule Texture Expressiveness

[0095] The super granulation watercolor paints prepared in Examples 1 to 8 and Comparative Examples 1 to 3 were applied to a canvas using a brush and, after sufficient drying, tested using a 5-point sensory evaluation method by observing the granule pattern with the naked eye. Specifically, the subjects participating in the sensory evaluation consisted of a total of 20 men and women, including adolescents aged 12 to 17 and adults aged 18 or older. The evaluation was conducted a total of 5 times in the order of 1, 2, 3, 4, and 5 points (higher is better), and the average of the three values ​​was rounded to the second decimal place and is shown in Tables 2 and 3 below.

[0096]

[0097] [Experimental Example 2] Long-term Dispersion Stability Comparison Test

[0098] The super granulation watercolor paints prepared in Examples 1 to 3 and Comparative Examples 1 to 3 were left in a non-vibrational environment for 30 days, and the long-term dispersion stability was evaluated by visually observing and comparing the change in state compared to the initial state. In addition, the super granulation watercolor paints were applied to a canvas and dried sufficiently, and the long-term dispersion stability was evaluated by visually observing the granule pattern and comparing the change in pattern compared to the initial state. The evaluation was conducted a total of 5 times in the order of 1, 2, 3, 4, and 5 points (1: very large change in state and pattern, 2: large change in state and pattern, 3: small change in state and pattern, 4: change in state but no change in pattern, 5: no change in state and pattern), and the average of the three values ​​was rounded to the second decimal place and is shown in Table 2 below.

[0099]

[0100] Composition Preliminary Comparative Example 123123 First inorganic pigment particles polylysine simple mixing OXXXOX (polylysine) surface modified particles XOOXO magnesium oxide particles average particle size (㎛) 550.075X0.07 After preparing the first / second watercolor paint by ultrasonically mixing OOOOOX all components at once ultrasonically mixing XXXXXO granule texture expressiveness 3.33.84.12.83.13.5 dispersion stability 2.83.44.61.62.84.7

[0101]

[0102] Composition Example 4 Example 5 Example 6 Example 7 Example 8 Average particle size (㎛) of the second inorganic pigment particles 126 10 12 Particle size ratio of the first / second inorganic pigment particles 10:0.5 10:1 10:3 10:5 10:6 Granule texture expressiveness 3.7 4.6 4.9 4.8 4.2

Claims

1. A super granulation watercolor paint that uses a mixture of the first watercolor paint and the second watercolor paint, The above-mentioned first watercolor paint comprises first inorganic pigment particles containing metal oxide particles, polylysine, a binder, and water, and The above second watercolor paint is a super granulation watercolor paint comprising a second inorganic pigment particle containing tourmaline particles, magnesium oxide particles, a binder, and water.

2. In Paragraph 1, The above first inorganic pigment particle is a super granulation watercolor paint, which is a surface-modified particle in which the above metal oxide particle is surface-treated with the above polylysine.

3. In Paragraph 2, The above surface modification particles are, a) a mixing step of mixing metal oxide particles and polylysine in an aqueous medium and b) A super granulation watercolor paint prepared by including a drying step of evaporating the aqueous medium so that the polylysine is adsorbed onto the surface of the metal oxide particles.

4. In Paragraph 3, The above step b) comprises a process of obtaining the metal oxide particles from the aqueous medium and then drying them at 70 to 150°C, for a super granulation watercolor paint.

5. In Paragraph 1, The above magnesium oxide particles are Pickering inorganic powders having surfactant ability based on Pickering emulsion, and The above Pickering inorganic powder is a super-granulation watercolor paint having an average particle size of 50 to 300 nm.

6. In Paragraph 1, The above-mentioned first watercolor paint and the above-mentioned second watercolor paint are super granulation watercolor paints, each manufactured by separately ultrasonically dispersing and mixing the respective components.

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