A multi-substrate painting color stick and a preparation method thereof

Abstract

This invention relates to a multi-substrate painting swirl stick and its preparation method. The multi-substrate painting swirl stick includes sodium hydroxide, stearic acid, myristic acid, potassium stearate, and nano-silica. In this invention, sodium hydroxide reacts with stearic acid to form sodium stearate, and sodium hydroxide reacts with myristic acid to form sodium myristate. Sodium stearate, sodium myristate, and potassium stearate together form a composite hydrogel soap-based system. Nano-silica acts as heterogeneous nucleation sites, guiding the formation of a microcrystalline network structure during the formation of the composite hydrogel soap-based system. During application, this microcrystalline network structure can achieve controllable interlayer slippage under shear force, thereby resulting in good adhesion, good color development on smooth material surfaces, minimal flaking, uniform color application, strong hiding power, and smooth painting.

Description

Technical Field

[0001] This invention relates to the field of art supplies technology, specifically to a multi-substrate painting swirl stick and its preparation method. Background Technology

[0002] Spinning sticks, as a new type of solid pigment, have received considerable attention in the art supplies industry in recent years. Compared to traditional oil pastels, crayons, and other solid pigments, spinning sticks typically feature a twist-out design. Users twist out the core, eliminating the need to touch the core while painting and avoiding the problem of hands getting dirty with solid pigments. Most commercially available spinning sticks are water-based, characterized by smooth application on paper, easy application, and vibrant colors. They are also easy to wash off hands and fabrics, making them primarily targeted at school-aged children.

[0003] However, existing commercially available swirl pastels are only suitable for use on porous surfaces (such as white cardstock and sketch paper). When applied to highly polar smooth surfaces such as glass, ceramics, metal, and acrylic, or medium- to low-polarity smooth surfaces such as plastic, swirl pastels generally have the following problems: First, the coating does not adhere well to the substrate, making it difficult for the pigments to spread and develop; second, the color is pale, flakes easily, and the covering power is poor, seriously affecting the painting experience and creative effect.

[0004] Children's nature dictates that they are not content with drawing only on paper; they often want to create freely on everyday objects such as glass windows, ceramic slabs, plastic toys, and metal surfaces. Therefore, providing a multi-substrate painting swivel stick that can achieve excellent adhesion, high color rendering, minimal flaking, uniform color distribution, strong opacity, and smooth painting on multiple substrates (including high-polarity smooth surfaces and medium-low-polarity smooth surfaces) has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The first technical problem to be solved by the present invention is to provide a multi-substrate painting swirl stick with good adhesion, which has good color development on smooth material surfaces, less flaking, uniform color application, strong hiding power, and smooth painting.

[0006] The second technical problem to be solved by the present invention is to provide a method for preparing the above-mentioned multi-substrate painting swirl stick, in view of the current state of the prior art.

[0007] The technical solution adopted by the present invention to solve at least one of the above-mentioned technical problems is as follows:

[0008] A multi-substrate painting swirl pastel, characterized in that it comprises the following components by weight:

[0009] 3-5 parts sodium hydroxide;

[0010] Stearic acid 4-6 parts;

[0011] Myristic acid 4-6 parts;

[0012] 1-2 parts potassium stearate;

[0013] 8-12 parts of colorant;

[0014] 20-30 parts of adhesive;

[0015] 15-25 parts of filler;

[0016] 1-2 parts of silicon dioxide;

[0017] 3-5 parts of auxiliary agent;

[0018] 10-35 parts deionized water.

[0019] Preferably, the components form a composite hydrogel soap-based system during the preparation process, wherein the silica is nano-silica, used as heterogeneous nucleation sites to guide the formation of a microcrystalline network structure during the formation of the composite hydrogel soap-based system. During the application process, the microcrystalline network structure in the multi-substrate painting swirl stick is used to achieve controllable interlayer slippage under shear force.

[0020] The components of this invention construct a composite hydrogel soap-based system composed of sodium stearate (C18), sodium myristate (C14), and potassium stearate (C18) during the reaction process. This system utilizes the synergy of long-chain fatty acid salts (C14 / C18) to endow the material with excellent rigidity and toughness balance. Based on this, nano-silica is introduced as a highly efficient heterogeneous nucleation site, inducing the formation of a uniform and dense microcrystalline network structure during the cooling and crystallization process of the composite hydrogel soap-based system. This fine crystalline topology significantly improves the overall mechanical stability of the gel system, effectively avoiding the risk of brittle fracture caused by large crystals or uneven crystallization, and greatly reducing the phenomenon of stick breakage and debris generation during painting. Furthermore, this structure enables controllable interlayer slippage under shear forces (such as smearing motions), ensuring that pigment layers can be peeled off layer by layer uniformly from the stick surface and efficiently transferred to the substrate, thereby improving pigment adhesion, resulting in uniform pigment application, smooth painting, and excellent color rendering.

[0021] The fine, uniform microcrystalline network structure induced by nano-silica also lays the foundation for excellent adhesion on multiple substrates. This microcrystalline structure provides abundant, scale-matched surface contact points at the interface, greatly enhancing the effective contact area and interaction strength between the composite system and substrates with different properties. This promotes the maximization of physical adsorption and intermolecular forces, ultimately achieving reliable adhesion across multiple substrates.

[0022] Preferably, the sodium hydroxide reacts with stearic acid to form sodium stearate, the sodium hydroxide reacts with myristic acid to form sodium myristate, and the sodium stearate, sodium myristate, and potassium stearate together form the composite hydrogel soap base system.

[0023] Preferably, the content of C18 fatty acids in the stearic acid is 40%-80%.

[0024] Preferably, the average particle size of the nano-silica is 20-60 nm.

[0025] Preferably, the adhesive is at least one of gum arabic, acrylic resin, polyurethane resin, sodium carboxymethyl cellulose, and polyvinylpyrrolidone.

[0026] Preferably, the filler is at least one of calcium carbonate, magnesium stearate, barium sulfate, kaolin, and talc.

[0027] Preferably, the additive is at least one of an antifreeze agent and an antifoaming agent.

[0028] A method for preparing a multi-substrate painting swirl stick includes the following steps:

[0029] (1) Preparation of intermediate slurry

[0030] Take a portion of deionized water, add binder, additives, filler and silica, disperse at high speed and then transfer to a sand mill for grinding three times to obtain an intermediate slurry with an average particle size of nanometer (preferably ≤500nm), uniform distribution and no agglomeration;

[0031] (2) Saponification reaction

[0032] A. Take a portion of deionized water and dissolve sodium hydroxide at room temperature to prepare an aqueous solution of sodium hydroxide;

[0033] B. Heat the remaining deionized water to 80-90℃, add stearic acid and myristic acid, and keep warm while stirring until they are completely dissolved.

[0034] C. While stirring continuously, slowly add the sodium hydroxide aqueous solution prepared in step A to the solution obtained in step B to carry out the saponification reaction;

[0035] (3) Mixing

[0036] Cool the saponification reaction product obtained in step (2) to 60-70℃, add potassium stearate, color paste and intermediate slurry obtained in step (1), and stir continuously for 50 minutes to obtain a uniform mixture;

[0037] (4) Molding

[0038] The uniform mixture obtained in step (3) is poured into a mold at 60-70℃ while still hot, and then cooled and solidified to obtain the multi-substrate painting swirl stick.

[0039] The components are homogeneously dispersed using the process described in this invention. Combined with an excellent adhesive system, the composite hydrogel soap-based system is tightly bonded to the ultrafinely ground and dispersed nanoscale fillers and pigments, forming a highly uniform composite dispersion system. The nanoscale pigments achieve uniform dispersion within the system, effectively reducing light scattering loss and significantly improving color saturation and intensity. Simultaneously, the nanoscale fillers and pigments work together, densely arranging themselves on the substrate surface through interlayer slippage, endowing the swirl-colored stick coating with extremely strong hiding power. This is due to the large specific surface area and surface activity of the nanoscale components, enabling the composite system to form dense and strong physical adsorption (such as van der Waals forces) and intermolecular forces (such as dipole-dipole interactions) on various substrate surfaces with vastly different properties (including high-polarity, high-surface-energy smooth surfaces such as glass and metal, and medium-to-low-polarity, low-surface-energy smooth surfaces such as various plastics). This universal strong interfacial interaction further enhances the excellent adhesion of the swirl-colored stick to multiple substrates.

[0040] Compared with the prior art, the advantages of the present invention are as follows: Sodium hydroxide reacts with stearic acid to generate sodium stearate, and sodium hydroxide reacts with myristic acid to generate sodium myristate. Sodium stearate, sodium myristate, and potassium stearate together form a composite hydrogel soap base system. Nano-silica acts as heterogeneous nucleation sites, guiding the formation of a microcrystalline network structure during the formation of the composite hydrogel soap base system. During the application process, this microcrystalline network structure can achieve controllable interlayer slippage under shear force, thereby making the multi-substrate painting swirl stick of the present invention have good adhesion, good color development on smooth material surfaces, less flaking, uniform color application, strong hiding power, and smooth painting. Attached Figure Description

[0041] Figure 1 The images show the painting effects of the swirl sticks obtained in Examples 1, 2, and 3 on glass, ceramic, and plastic substrates, respectively.

[0042] Figure 2 The images show the painting effects of the swirl markers obtained in Comparative Examples 1 and 2 on glass, ceramic, and plastic substrates, respectively.

[0043] Figure 3 The images show the painting effects of the swirl markers obtained in Comparative Example 3 on glass, ceramic, and plastic substrates.

[0044] Figure 4 This is a cross-sectional view of the spiral coloring rod obtained in Example 1 after it has been cut open.

[0045] Figure 5 This is a cross-sectional view of the spiral colored rod obtained in Comparative Example 4 after it has been cut open. Detailed Implementation

[0046] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0047] Example 1

[0048] According to the weight composition, the raw materials of the multi-substrate painting swirl stick in this embodiment include the following components: 4 parts sodium hydroxide, 5 parts stearic acid, 5 parts myristic acid, 1 part potassium stearate, 10 parts color paste (water-based titanium white paste), 25 parts polyurethane resin, 20 parts calcium carbonate, 1 part nano silica (average particle size 30nm), 3 parts additives (2.8 parts 1,2-propanediol, 0.2 parts defoamer DAPRO® DF 7015), and 26 parts deionized water.

[0049] The preparation method of the above-mentioned multi-substrate painting swirl stick is as follows:

[0050] (1) Preparation of intermediate slurry

[0051] Take 30% of the total deionized water, add binder (polyurethane resin), additives (1,2-propanediol, defoamer), filler (calcium carbonate) and nano silica, disperse in a high-speed disperser at 1000 rpm for 15 minutes, transfer to a horizontal sand mill, use zirconia beads as the grinding medium, and grind three times to obtain an intermediate slurry with an average particle size of 300 nm, uniform distribution and no agglomeration.

[0052] (2) Saponification reaction

[0053] A. Take 20% of the total amount of deionized water and dissolve sodium hydroxide at room temperature (25±2℃) to obtain an aqueous solution of sodium hydroxide.

[0054] B. Heat the remaining deionized water to 85°C, add stearic acid and myristic acid, keep warm and stir for 10 minutes until completely dissolved;

[0055] C. Under continuous stirring (300 rpm), slowly add the sodium hydroxide aqueous solution prepared in step A to the solution obtained in step B, keep warm and stir for 30 minutes to carry out the saponification reaction;

[0056] (3) Mixing

[0057] The saponification reaction product obtained in step (2) was cooled to 65°C, and potassium stearate, color paste and intermediate slurry obtained in step (1) were added. The mixture was stirred for 50 minutes to obtain a homogeneous mixture.

[0058] (4) Molding

[0059] The uniform mixture obtained in step (3) is poured into a mold at 60-70℃ while it is still hot, and then cooled and solidified to obtain a multi-substrate painting swirl stick.

[0060] Example 2

[0061] According to the weight composition, the raw materials of the multi-substrate painting swirl stick in this embodiment include the following components: 4 parts sodium hydroxide, 5 parts stearic acid, 5 parts myristic acid, 1 part potassium stearate, 10 parts color paste (water-based medium yellow paste), 30 parts polyurethane resin, 25 parts calcium carbonate, 2 parts nano silica (average particle size 20nm), 3 parts additives (2.8 parts 1,2-propanediol, 0.2 parts defoamer DAPRO® DF 7015), and 15 parts deionized water.

[0062] In this embodiment, the preparation method of the multi-substrate painting swirl stick is consistent with that in Example 1, with only the corresponding components being replaced adaptively.

[0063] Example 3

[0064] According to the weight composition, the raw materials of the multi-substrate painting swirl stick in this embodiment include the following components: 3 parts sodium hydroxide, 4.5 parts stearic acid, 4.5 parts myristic acid, 2 parts potassium stearate, 10 parts color paste (water-based phthalocyanine blue paste), 20 parts acrylic resin, 25 parts kaolin, 1 part nano silica (average particle size 50nm), 3 parts additives (2.8 parts 1,2-propanediol, 0.2 parts defoamer DAPRO® DF 7015), and 27 parts deionized water.

[0065] In this embodiment, the preparation method of the multi-substrate painting swirl stick is consistent with that in Example 1, with only the corresponding components being replaced adaptively.

[0066] Comparative Example 1

[0067] By weight, the raw materials of the multi-substrate painting swirl stick in this comparative example include the following components: 4 parts sodium hydroxide, 5 parts stearic acid, 1 part potassium stearate, 10 parts color paste (water-based titanium dioxide and medium yellow paste, respectively), 25 parts polyurethane resin, 20 parts calcium carbonate, 1 part nano silica (average particle size 30 nm), 3 parts additives (2.8 parts 1,2-propanediol, 0.2 parts defoamer DAPRO® DF 7015), and 31 parts deionized water.

[0068] The preparation method of the multi-substrate painting swirl stick in this embodiment is consistent with that in Example 1, with only adaptive adjustments.

[0069] Comparative Example 2

[0070] By weight, the raw materials of the multi-substrate painting swirl stick in this comparative example include the following components: 4 parts sodium hydroxide, 5 parts stearic acid, 5 parts myristic acid, 10 parts pigment (phthalocyanine blue pigment), 25 parts polyurethane resin, 20 parts calcium carbonate, 1 part nano silica (average particle size 30 nm), 3 parts additives (2.8 parts 1,2-propanediol, 0.2 parts defoamer DAPRO® DF 7015), and 27 parts deionized water. The preparation method of the multi-substrate painting swirl stick in this example is consistent with that in Example 1, with only adaptive adjustments.

[0071] Comparative Example 3

[0072] By weight, the raw materials of the multi-substrate painting swirl stick in this comparative example include the following components: 4 parts sodium hydroxide, 5 parts stearic acid, 5 parts myristic acid, 1 part potassium stearate, 10 parts color paste (water-based titanium dioxide, medium yellow, and phthalocyanine blue pastes), 25 parts polyurethane resin, 20 parts calcium carbonate, 3 parts additives (2.8 parts 1,2-propanediol, 0.2 parts defoamer DAPRO® DF 7015), and 27 parts deionized water. The preparation method of the multi-substrate painting swirl stick in this example is consistent with that in Example 1, with only adaptive adjustments.

[0073] Comparative Example 4:

[0074] By weight, the raw materials of the multi-substrate painting swirl stick in this comparative example include the following components: 4 parts sodium hydroxide, 5 parts stearic acid, 5 parts myristic acid, 1 part potassium stearate, 10 parts color paste (water-based titanium white paste), 25 parts polyurethane resin, 20 parts calcium carbonate, 1 part silica (average particle size 2 μm), 3 parts additives (2.8 parts 1,2-propanediol, 0.2 parts defoamer DAPRO®DF 7015), and 26 parts deionized water.

[0075] The preparation method of the multi-substrate painting swirl stick in this embodiment is consistent with that in Example 1, with only adaptive adjustments.

[0076] from Figure 1 , 2 As can be seen, the multi-substrate painting swirl sticks described in Embodiments 1, 2, and 3 of this invention can achieve excellent adhesion, high color rendering, uniform color application, and strong hiding power on multiple substrates. The composite hydrogel soap base system composed of sodium stearate, sodium myristate, and potassium stearate can improve the insufficient toughness of a single sodium stearate hydrogel soap base and eliminate the problem of difficulty in color application and flaking on multiple substrates due to excessive hardness.

[0077] from Figure 1 , 3It can be seen that by introducing nano-silica as heterogeneous nucleation sites, the formation of a microcrystalline network structure is guided during the formation of the composite hydrogel soap-based system. During the application process, the microcrystalline network structure can achieve controllable interlayer slip under shear force, resulting in uniform color development, good color rendering, and minimal residue on smooth material surfaces.

[0078] pass Figure 4 , 5 It can be seen that, Figure 4 The cross-section of the spiral colored rod is flat and dense. Figure 5 The cross-section of the swirl paint stick is rough and not dense. During the cooling crystallization process of fatty acid salts, compared with conventional-sized silica, nano-silica can provide more crystallization sites, inducing the formation of a fine and uniform crystal network structure. Conversely, larger-sized silica particles will induce the formation of large, unevenly sized crystals, causing abnormal problems such as chipping and breakage when painting with the swirl paint stick.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A multi-substrate painting swirl stick, characterized in that: Based on weight components, it includes the following components 3-5 parts sodium hydroxide; Stearic acid 4-6 parts; Myristic acid 4-6 parts; 1-2 parts potassium stearate; 8-12 parts of colorant; 20-30 parts of adhesive; 15-25 parts of filler; 1-2 parts of silicon dioxide; 3-5 parts of auxiliary agent; 10-35 parts deionized water.

2. The multi-substrate painting swirl stick according to claim 1, characterized in that: During the preparation process, the components form a composite hydrogel soap base system. The silica is nano-silica, which is used as a heterogeneous nucleation site to guide the formation of a microcrystalline network structure during the formation of the composite hydrogel soap base system.

3. The multi-substrate painting swirl stick according to claim 2, characterized in that: During the application process, the microcrystalline network structure in the multi-substrate painting swirl bar is used to achieve controllable interlayer slippage under shear force.

4. The multi-substrate painting swirl stick according to claim 2, characterized in that: The sodium hydroxide reacts with stearic acid to form sodium stearate, and the sodium hydroxide reacts with myristic acid to form sodium myristate. The sodium stearate, sodium myristate, and potassium stearate together form the composite hydrogel soap base system.

5. The multi-substrate painting swirl stick according to claim 2, characterized in that: The stearic acid contains 40%-80% C18 fatty acids.

6. The multi-substrate painting swirl stick according to claim 2, characterized in that: The average particle size of the nano-silica is 20-60 nm.

7. The multi-substrate painting swirl stick according to any one of claims 1 to 6, characterized in that: The adhesive is at least one of gum arabic, acrylic resin, polyurethane resin, sodium carboxymethyl cellulose, and polyvinylpyrrolidone.

8. The multi-substrate painting swirl stick according to any one of claims 1 to 6, characterized in that: The filler is at least one of calcium carbonate, magnesium stearate, barium sulfate, kaolin, and talc.

9. The multi-substrate painting swirl stick according to any one of claims 1 to 6, characterized in that: The additive is at least one of the following: additives and defoamers.

10. A method for preparing a multi-substrate painting swirl stick, characterized in that: Includes the following steps (1) Preparation of intermediate slurry Take a portion of deionized water, add binder, additives, filler and silica, disperse at high speed and then transfer to a sand mill for grinding three times to obtain an intermediate slurry with an average particle size of nanoscale, uniform distribution and no agglomeration. (2) Saponification reaction A. Take a portion of deionized water and dissolve sodium hydroxide at room temperature to prepare an aqueous solution of sodium hydroxide; B. Heat the remaining deionized water to 80-90℃, add stearic acid and myristic acid, and keep warm while stirring until they are completely dissolved. C. While stirring continuously, slowly add the sodium hydroxide aqueous solution prepared in step A to the solution obtained in step B to carry out the saponification reaction; (3) Mixing Cool the saponification reaction product obtained in step (2) to 60-70°C, add potassium stearate, color paste and intermediate slurry obtained in step (1), and continue stirring until a uniform mixture is obtained. (4) Molding The uniform mixture obtained in step (3) is poured into a mold at 60-70℃ while still hot, and then cooled and solidified to obtain the multi-substrate painting swirl stick.

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