Blending liquid for baked porcelain powder as well as preparation method and application of blending liquid

Abstract

The invention discloses a blended liquid for baked porcelain powder and a preparation method and application thereof, and belongs to the field of all-porcelain false tooth manufacturing. The blending liquid for the baked porcelain powder comprises the following raw materials in parts by weight: 93-98 parts of a polyol solvent, 1-3 parts of a thickening suspending agent, 1-3 parts of a dispersing agent, 0.1-0.2 part of a flatting agent, 0.1-0.5 part of a defoaming agent and 0.05-0.1 part of an adhesive. After being mixed with baked porcelain powder, the mixed liquid can be stored for a long time, the powder liquid is stable in suspension, the leveling property is good in the brushing process, and the adhesive force with baked porcelain teeth is high.

Description

Technical Field

[0001] This application relates to a mixing liquid for porcelain powder, its preparation method and application, belonging to the field of all-ceramic denture fabrication. Background Technology

[0002] In the process of making all-ceramic dentures, the surface of the porcelain crown needs to be stained and coated with a transparent glaze. Usually, transparent glaze containing pigment and transparent glaze without pigment are mixed evenly with an organic solution to form a paste. The paste is then evenly brushed onto the surface of the porcelain crown with a glaze brush, and then placed in a porcelain furnace for high-temperature sintering, ultimately forming a glossy glaze layer on the surface of the porcelain crown.

[0003] Currently, the main problems in the fabrication of all-ceramic dentures are as follows: First, the glaze and powder are prone to separation, making operation inconvenient and requiring frequent stirring; second, the fluidity is poor during the application process, making it difficult to apply evenly and resulting in brush marks after sintering; third, the adhesion is insufficient, causing the glaze to flow to low-lying areas and accumulate, resulting in unevenness after sintering, and even problems such as bubbles and whitening. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a mixing liquid for porcelain veneer powder, its preparation method, and its application. After mixing with porcelain veneer powder, the mixing liquid can be stored for a long time, the powder and liquid are stably suspended, it has good leveling properties during brushing, and it has strong adhesion to porcelain veneers.

[0005] The technical solution of the present invention is as follows:

[0006] According to one aspect of this application, a mixing liquid for ceramic powder is provided, comprising the following raw materials in parts by weight: 93-98 parts of polyol solvent, 1-3 parts of thickening and suspending agent, 1-3 parts of dispersant, 0.1-0.2 parts of leveling agent, 0.1-0.5 parts of defoamer, and 0.05-0.1 parts of binder.

[0007] Optionally, the weight ratio of the polyol solvent to the thickening suspending agent is (32-93):1.

[0008] Optionally, the polyol solvent is selected from one or more of 1,3-butanediol, 1,2-propanediol, and terpineol;

[0009] The thickening suspending agent is selected from one or more of hydroxypropyl cellulose, sodium carboxymethyl cellulose, and hydroxyethyl cellulose.

[0010] Optionally, the dispersant is Span-80 and / or polyvinylpyrrolidone.

[0011] Optionally, the adhesive is selected from one or more of glycerin, polyacrylate and polyurethane resin.

[0012] Optionally, the leveling agent is selected from one or more of silicone leveling agents, polyacrylate leveling agents, and polyurethane leveling agents.

[0013] Optionally, the defoamer is selected from one or more of silicone oil, polyoxyethylene ether, and paraffin oil.

[0014] According to another aspect of this application, a method for preparing the mixing liquid for porcelain powder as described in any of the above claims is provided, comprising the following steps:

[0015] (1) By weight, add 1-3 parts of thickening suspending agent to 93-98 parts of polyol solvent, heat to 55-65℃, stir for 60-120 minutes until completely dissolved to form a transparent viscous liquid.

[0016] (2) Add 1-3 parts of dispersant to the transparent viscous liquid in step (1), stir for 10-20 minutes at room temperature, then add 0.05-0.1 parts of binder, and continue stirring for 15-25 minutes to obtain a uniform mixed solution;

[0017] (3) Add 0.1-0.2 parts of leveling agent and 0.1-0.5 parts of defoamer to the uniformly mixed solution in step (2) and stir for 5-15 minutes to obtain the mixing solution for porcelain powder.

[0018] Optionally, in steps (1) and (2), the stirring speed is 150-250 rpm;

[0019] In step (3), the stirring speed is 350-450 rpm.

[0020] According to another aspect of this application, the application of the porcelain powder mixing solution described in any of the above claims in the fabrication of all-ceramic dentures is provided.

[0021] In this application, "room temperature" refers to 20-30℃.

[0022] The beneficial effects of this application include, but are not limited to:

[0023] 1. The porcelain powder mixing solution, its preparation method, and its application described in this application involve a thickening and suspending agent that, after dissolving in a polyol solvent, forms a network structure. This network, working in conjunction with the dispersant, ensures uniform dispersion of the porcelain powder and maintains stable suspension without settling over a long period. The addition of a binder increases the adhesion of the enamel layer to the porcelain tooth surface. A leveling agent improves the flowability during application, promoting spontaneous spreading of the paste on the porcelain tooth surface and preventing brush marks after sintering. The addition of an antifoaming agent helps reduce air bubbles in the paste, preventing voids or defects in the enamel layer. The various raw materials, in specific proportions, work together to form a homogeneous solution. When mixed with the porcelain powder, the powder-liquid suspension is stable, facilitating long-term storage. It exhibits good leveling properties during application and strong adhesion to the porcelain tooth after application, improving the quality and aesthetics of the enamel layer.

[0024] 2. The porcelain powder mixing solution, its preparation method, and its application described in this application, utilize a transparent viscous liquid formed by the thorough mixing of a thickening suspending agent and a polyol solvent. This provides a stable base system and reduces the possibility of subsequent particle sedimentation. The dispersant effectively prevents the agglomeration of porcelain powder particles, ensuring their uniform distribution within the mixing solution. The binder is added after the dispersant to avoid being encapsulated by the viscous liquid and thus becoming ineffective. Direct contact with the porcelain powder enhances the bonding strength between the porcelain tooth and the enamel layer. Finally, a leveling agent and defoamer are added, followed by rapid stirring within a short time to ensure uniform dispersion and eliminate air bubbles. By adding each raw material in stages, their functionality is maximized. Heating increases the efficiency of viscous liquid formation, which is then adjusted to room temperature to avoid damaging the properties of subsequent raw materials. Slow stirring avoids shear damage to sensitive components and promotes their full dissolution and uniform dispersion, reducing the introduction of air bubbles. This, combined with the subsequent rapid stirring process, ensures the uniformity and stability of the mixing solution and improves production efficiency. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0026] Figure 1 The image shows the mixture of the blending liquid from Example 2 and porcelain powder applied to the surface of a porcelain crown.

[0027] Figure 2 for Figure 1 Image after drying.

[0028] Figure 3 for Figure 2 Image after sintering.

[0029] Figure 4 This image shows the mixture of the blending liquid from Comparative Example 3 and porcelain powder applied to the surface of a porcelain crown.

[0030] Figure 5 for Figure 4 Image after drying.

[0031] Figure 6 for Figure 5 Image after sintering. Detailed Implementation

[0032] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0033] Unless otherwise specified in the examples, the procedures shall be performed under standard conditions or conditions recommended by the manufacturer. Raw materials or instruments whose manufacturers are not specified are all commercially available products.

[0034] Example 1

[0035] A method for preparing a mixing liquid for porcelain powder includes the following steps:

[0036] (1) Add 3 parts by weight of sodium carboxymethyl cellulose to 93 parts of 1,2-propanediol, heat to 55°C, and stir at 150 rpm for 60 min until completely dissolved to form a transparent viscous liquid.

[0037] (2) Add 1 part of polyvinylpyrrolidone to the transparent viscous liquid in step (1), stir for 10 min at room temperature, then add 0.05 part of polyacrylate, and continue stirring for 15 min to obtain a uniform mixed solution.

[0038] (3) Add 0.1 part of polyacrylate leveling agent and 0.1 part of silicone oil to the uniformly mixed solution in step (2) in sequence, and stir at 350 rpm for 5 min to obtain the mixing solution for ceramic powder.

[0039] Example 2

[0040] A method for preparing a mixing liquid for porcelain powder includes the following steps:

[0041] (1) By weight, add 2 parts of hydroxypropyl cellulose to 95.45 parts of 1,3-butanediol, heat to 60°C, and stir at 200 rpm for 90 min until completely dissolved to form a transparent viscous liquid.

[0042] (2) Add 2 parts of Span-80 to the transparent viscous liquid in step (1), stir for 15 minutes at room temperature, then add 0.1 parts of glycerol and continue stirring for 20 minutes to obtain a homogeneous mixed solution;

[0043] (3) Add 0.15 parts of silicone leveling agent and 0.3 parts of polyoxyethylene ether to the uniformly mixed solution in step (2) and stir at 400 rpm for 10 min to obtain the mixing solution for porcelain powder.

[0044] Example 3

[0045] A method for preparing a mixing liquid for porcelain powder includes the following steps:

[0046] (1) By weight, add 1 part hydroxyethyl cellulose to 98 parts terpineol, heat to 65°C, stir at 250 rpm for 120 min until completely dissolved to form a transparent viscous liquid.

[0047] (2) Add 3 parts of polyvinylpyrrolidone to the transparent viscous liquid in step (1), stir for 20 min at room temperature, then add 0.1 parts of polyurethane resin and continue stirring for 25 min to obtain a uniform mixed solution.

[0048] (3) Add 0.2 parts of polyurethane leveling agent and 0.5 parts of paraffin oil to the uniformly mixed solution in step (2) and stir at 450 rpm for 15 min to obtain the mixing solution for porcelain powder.

[0049] Example 4

[0050] The difference from Example 2 is that the amount of 1,3-butanediol added is 98 parts and the amount of hydroxypropyl cellulose added is 3 parts.

[0051] Example 5

[0052] The difference from Example 2 is that the amount of 1,3-butanediol added is 93 parts and the amount of hydroxypropyl cellulose added is 1 part.

[0053] Example 6

[0054] The difference from Example 2 is that the stirring temperature in step (1) is room temperature.

[0055] Example 7

[0056] The difference from Example 2 is that the stirring speed in step (1) is 400 rpm.

[0057] Example 8

[0058] The difference from Example 2 is that step (2) is:

[0059] Add 0.1 parts of glycerol to the transparent viscous liquid in step (1), stir for 20 minutes at room temperature, then add 2 parts of Span-80 and continue stirring for 15 minutes to obtain a homogeneous mixed solution.

[0060] Comparative Example 1

[0061] The difference from Example 2 is that hydroxypropyl cellulose was not added.

[0062] Comparative Example 2

[0063] The difference from Example 2 is that no glycerin was added.

[0064] Comparative Example 3

[0065] Using commercially available blending solutions, the composition of the blending solution by weight is: 30 parts 1,3-butanediol and 70 parts water.

[0066] Application examples

[0067] Taking the following ceramic powder as an example, the overall performance of the blended liquids prepared in Examples 1-8 and Comparative Examples 1-3 is evaluated.

[0068] The ceramic powder composition by weight is: 55 parts SiO2, 5 parts Al2O3, 6.5 parts K2O, 6.5 parts Na2O, 4 parts Li2O, 14.5 parts B2O3, and 1.3 parts CeO2.

[0069] The porcelain powder and the mixing liquid (prepared by the methods of Examples 1-8 and Comparative Examples 1-3) in a weight ratio of 1:0.5 were mixed evenly to obtain a paste suitable for making all-ceramic dentures. The paste was then applied to the surface of the porcelain tooth and sintered at 750°C to form a glossy glaze layer.

[0070] The adhesion test method is as follows: After mixing the porcelain powder into a paste, apply it to the surface of the porcelain tooth. After the liquid evaporates and dries, observe the distribution of the porcelain powder on the tooth surface. If the porcelain powder is evenly distributed, it indicates good adhesion. If the porcelain powder accumulates at the bottom of the porcelain tooth, it indicates poor adhesion.

[0071] The test results are shown in Table 1 below.

[0072] Table 1

[0073]

[0074]

[0075] As shown in Table 1, the test results indicate that the mixtures prepared in Examples 1-5, when combined with the porcelain powder, can be stored for a long period, and the powder-liquid suspension remains stable. Figure 1 The image shows the mixture of the blending solution from Example 2 and porcelain powder applied to the surface of a porcelain crown. Figure 2 for Figure 1 Image after drying Figure 3 for Figure 2 Images after sintering, by Figure 1-3 It can be seen that when the mixing liquid of Example 2 is mixed with porcelain powder and then brushed onto the surface of porcelain teeth, the resulting glaze layer is smooth, bright and transparent with good adhesion. Figure 4 The image shows the mixture of the blending liquid from Comparative Example 3 and porcelain powder applied to the surface of a porcelain crown. Figure 5 for Figure 4 Image after drying Figure 6 for Figure 5 Images after sintering, by Figure 4-6 It can be seen that when the mixture of Comparative Example 3 and porcelain powder is applied to the surface of porcelain teeth, the bottom edge of the enamel layer becomes thicker and whiter, resulting in poor adhesion.

[0076] The above description is merely an embodiment of this application, and the scope of protection of this application is not limited to these specific embodiments, but is determined by the claims of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the technical concept and principles of this application should be included within the scope of protection of this application.

Claims

1. A mixing liquid for porcelain powder, characterized in that, The raw materials include the following parts by weight: 93-98 parts of polyol solvent, 1-3 parts of thickening and suspending agent, 1-3 parts of dispersant, 0.1-0.2 parts of leveling agent, 0.1-0.5 parts of defoamer, and 0.05-0.1 parts of adhesive.

2. The mixing liquid for porcelain powder according to claim 1, characterized in that, The weight ratio of the polyol solvent to the thickening suspending agent is (32-93):

1.

3. The mixing liquid for porcelain powder according to claim 1, characterized in that, The polyol solvent is selected from one or more of 1,3-butanediol, 1,2-propanediol, and terpineol; The thickening suspending agent is selected from one or more of hydroxypropyl cellulose, sodium carboxymethyl cellulose, and hydroxyethyl cellulose.

4. The mixing liquid for porcelain powder according to claim 1, characterized in that, The dispersant is Span-80 and / or polyvinylpyrrolidone.

5. The mixing liquid for porcelain powder according to claim 1, characterized in that, The adhesive is selected from one or more of glycerin, polyacrylate and polyurethane resin.

6. The mixing liquid for porcelain powder according to claim 1, characterized in that, The leveling agent is selected from one or more of silicone leveling agents, polyacrylate leveling agents, and polyurethane leveling agents.

7. The mixing liquid for porcelain powder according to claim 1, characterized in that, The defoamer is selected from one or more of silicone oil, polyoxyethylene ether, and paraffin oil.

8. A method for preparing a mixing liquid for porcelain powder according to any one of claims 1-7, characterized in that, Includes the following steps: (1) By weight, add 1-3 parts of thickening suspending agent to 93-98 parts of polyol solvent, heat to 55-65℃, stir for 60-120 minutes until completely dissolved to form a transparent viscous liquid. (2) Add 1-3 parts of dispersant to the transparent viscous liquid in step (1), stir for 10-20 minutes at room temperature, then add 0.05-0.1 parts of binder, and continue stirring for 15-25 minutes to obtain a uniform mixed solution; (3) Add 0.1-0.2 parts of leveling agent and 0.1-0.5 parts of defoamer to the uniformly mixed solution in step (2) and stir for 5-15 minutes to obtain the mixing solution for porcelain powder.

9. The method for preparing the mixing liquid for porcelain powder according to claim 8, characterized in that, In steps (1) and (2), the stirring speed is 150-250 rpm; In step (3), the stirring speed is 350-450 rpm.

10. The application of the porcelain powder mixing solution according to any one of claims 1-7 in the manufacture of all-ceramic dentures.

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