A complex iridescent reagent, a preparation method thereof and a preparation method of iridescent enamel plate

Abstract

This invention discloses a compound iridescent reagent, comprising an iridescent reagent and a mixed reagent, wherein the mixed reagent comprises a diluent and a thickener; the preparation method specifically includes the following steps: (1) mixing the diluent and the thickener and stirring evenly to obtain the mixed reagent; (2) mixing the iridescent reagent and the mixed reagent and stirring evenly to obtain the iridescent reagent. This invention also discloses a method for preparing an iridescent enamel plate, specifically including the following steps: (1) adjusting the air pressure to 0.45MPa and the gun distance to 350mm, spraying the compound iridescent reagent onto the enamel plate base and drying it; (2) firing the enamel plate with a yellow phase in the range of 12-14 after spraying and drying to obtain the iridescent enamel plate. This invention mainly aims to find an industrialization method for iridescent enamel plates in the experimental stage, specifically detailing the process of mass production, and ultimately obtaining iridescent enamel plates whose various physical and chemical properties meet the standard requirements of normal enamel plates.

Description

Technical Field

[0001] This invention relates to the field of enamel plate technology, and more specifically to a compound iridescent reagent, its preparation method, and a method for preparing iridescent enamel plates. Background Technology

[0002] Currently, the feasibility of using iridescent enamel panels in the pilot phase has been confirmed, but many problems still exist in the production process. For example:

[0003] 1. The mass ratio of iridescent reagent to diluent in the original laboratory stage was 1:1.5. This ratio is not suitable for large-scale production and production equipment due to differences, and is prone to defects such as dripping and fading of iridescent effect.

[0004] 2. The enamel surface of the enamel base plate is made by electrostatic dry spraying. Due to the composition of the electrostatic powder itself, some of the coating material remains on the base plate surface after firing. Small spots will appear after the iridescent reagent is sprayed on and fired.

[0005] 3. Under normal production conditions with a spraying air pressure of 0.50MPa and a gun distance of 400mm, the iridescent reagent is prone to dripping or dark flow, resulting in colored flow marks resembling broken lines on the iridescent effect of the burned-out plates.

[0006] 4. The coating thickness of the iridescent reagent is relatively low (generally less than 10μm), while the uniformity of the enamel surface is generally 20μm (with even greater differences at the edges and corners), making thickness measurement quite difficult.

[0007] Therefore, how to achieve the industrial-scale production of iridescent enamel panels is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0008] In view of this, the purpose of the present invention is to provide a compound iridescent reagent and its preparation method, as well as a method for preparing iridescent enamel plates, so as to overcome the shortcomings of the prior art.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A compound iridescent reagent includes an iridescent reagent and a mixed reagent, wherein the mixed reagent includes a diluent and a thickener.

[0011] Furthermore, the mass ratio of the above-mentioned iridescent reagent and mixed reagent is 1:1.1; the mass ratio of the diluent and thickener is 100:0.3.

[0012] Furthermore, the diluent mentioned above is turpentine or terpineol. Even further, the diluent mentioned above is terpineol.

[0013] Furthermore, the thickeners mentioned above are ethyl cellulose and white petroleum resin. Even further, the mass ratio of the ethyl cellulose and white petroleum resin is 2:1.

[0014] A method for preparing the above-mentioned compound iridescent reagent specifically includes the following steps:

[0015] (1) Mix the diluent and thickener, stir well, and obtain a mixed reagent;

[0016] (2) Mix the iridescent reagent and the mixed reagent and stir until homogeneous to obtain the compound iridescent reagent.

[0017] A method for preparing a polychrome enamel plate containing the above-mentioned compound polychrome reagent specifically includes the following steps:

[0018] (1) Adjust the air pressure to 0.45MPa and the gun distance to 350mm, spray the compound iridescent reagent onto the enamel base plate, and dry it;

[0019] (2) After the enamel plate with yellow phase in the range of 12-14 after spraying and drying is produced and fired to obtain the iridescent enamel plate.

[0020] Furthermore, in step (1) above, the drying time is 10 minutes.

[0021] Furthermore, in step (2) above, the firing temperature is 500℃ and the firing time is 8 minutes.

[0022] As can be seen from the above technical solution, compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. This invention adjusts the mass ratio of iridescent reagent and mixed reagent (mainly diluent) to 1:1.1, and increases the viscosity of iridescent reagent by thickening agent to ensure that iridescent reagent can be evenly placed on the enamel plate base during production and produce a good iridescent effect.

[0024] 2. Through experiments, it was found that the enamel surface fired with wet glaze slurry prepared by grinding pure titanium-based glaze can better retain the iridescent reagent, and the surface is clean after firing, which solves the problem of small spots appearing on the porcelain surface after iridescent enamel panels are made.

[0025] 3. This invention, by adjusting the mass ratio of the iridescent reagent and the mixed reagent to 1:1.1, reduces the air pressure to 0.45MPa, decreases the gun distance to about 350mm, and changes the gun movement method, only moving the gun up and down, strictly prohibiting horizontal movement, to avoid iridescent reagent flow marks, thus making the iridescent effect of the mass production section more excellent.

[0026] 4. This invention first determines the range of iridescent reagent spray thickness based on the color difference during drying and fixing, providing a valid reference for the overall effect after firing. After 10 minutes of drying after spraying, if the yellow phase is in the range of 12-14, production and firing can proceed. If it is below 12, it indicates that the iridescent reagent thickness is insufficient and needs to be resprayed. If it is above 14, it indicates that the iridescent reagent thickness is too high and needs to be cleaned and wiped off. This establishes a quality measurement basis for stable production.

[0027] 5. Based on the experimental results of iridescent enamel plates, this invention seeks the most suitable industrialization process, refines the control of each production link, and realizes the industrialization of iridescent enamel plates. It mainly consists of the following: (1) re-adjustment of industrialized iridescent reagents; (2) preparation method of iridescent enamel plates, pretreatment and preparation process; (3) post-processing method of iridescent enamel plates and confirmation of various physicochemical properties.

[0028] 6. The main purpose of this invention is to find an industrialization method for the experimental phase of iridescent enamel panels, specifically the details of each step in mass production, so that the resulting iridescent enamel panels meet the standard requirements of normal enamel panels in terms of various physical and chemical properties. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the following examples, the color-changing reagent was purchased from Foshan Sencailiang Decorative Materials Co., Ltd., and the product name is Cold Spray Color-Changing Water, with product batch number SC202303010.

[0031] Example 1

[0032] The compound iridescent reagent includes an iridescent reagent and a mixed reagent in a mass ratio of 1:1.1; wherein the mixed reagent includes terpineol, ethyl cellulose and white petroleum resin in a mass ratio of 100:0.2:0.1.

[0033] The preparation method of the above-mentioned compound iridescent reagent specifically includes the following steps:

[0034] (1) Mix terpineol, ethyl cellulose and white petroleum resin in a mass ratio of 100:0.2:0.1 and stir until homogeneous to obtain a mixed reagent;

[0035] (2) Mix the iridescent reagent and the mixed reagent at a mass ratio of 1:1.1 and stir until homogeneous to obtain the compound iridescent reagent.

[0036] Example 2

[0037] The preparation method of iridescent enamel panels specifically includes the following steps:

[0038] (1) Adjust the air pressure to 0.45MPa and the gun distance to 350mm, spray the compound iridescent reagent prepared in Example 1 onto the enamel plate base, and dry for 10min;

[0039] (2) After the enamel plate with yellow phase in the range of 12-14 after spraying and drying is dried, it is fired at 500℃ for 8 minutes to obtain the iridescent enamel plate.

[0040] Performance testing

[0041] I. Preliminary Screening Tests for Diluents and Thickeners

[0042] 1. Experimental objective:

[0043] By experimenting with different diluent ratios and the appropriate proportions of thickener added internally, a diluent and thickener for the iridescent reagent that are more suitable for making iridescent enamel plates were prepared.

[0044] 2. Test conditions:

[0045] Experimental materials: turpentine, terpineol, gasoline, No. 120 solvent oil, ethyl cellulose, white petroleum resin, acrylic resin, polyurethane resin, iridescent reagent, 500*500 white enamel base plate;

[0046] Test temperature: room temperature;

[0047] Experimental apparatus: beaker, glass rod.

[0048] 3. Experimental Procedure:

[0049] According to the groups in Table 1 below, mix the diluent and thickener, stir well, and obtain the mixed reagent.

[0050] Table 1 Grouping of Mixed Reagents

[0051] Group diluent Thickener 1 100% turpentine Ethyl cellulose 0.1% 2 100% terpineol 0.2% white petroleum resin 3 100% gasoline 0.3% acrylic resin 4 120 solvent oil 100% 0.5% polyurethane resin

[0052] (1) The four mixed reagents were titrated with water in the same equipment for 1 minute. The comparative viscosity of the mixed reagents was measured by referring to the flow rate of water using a simplified titration method. The results are shown in Table 2.

[0053] (2) The four mixed reagents were mixed with the iridescent reagent at a mass ratio of 1.1:1 to obtain the iridescent reagent. The air pressure was adjusted to 0.45MPa and the gun distance was about 350mm. The iridescent reagent was then sprayed onto a specific enamel plate, and the powder application and construction performance were observed.

[0054] 4. Experimental data:

[0055] Table 2 Comparative Viscosities of Mixed Reagents

[0056] Group water 1 2 3 4 Volume (mL) 100 95 83 67 34

[0057] 5. Data Analysis:

[0058] After adding thickener, the viscosity of the diluent increases. Group 1 is too thin and has poor adhesion to the spray plate after mixing with the color reagent, so it is not used. Group 4 has obviously too high viscosity, which is not conducive to subsequent production. It is recommended to add thickener in the range of 0.2% to 0.3%.

[0059] 6. Experimental Conclusions:

[0060] (1) Based on the operational performance of the mixed reagents, turpentine oil and turpentine alcohol are more easily blended with thickeners than gasoline and No. 120 solvent oil, and are more suitable as diluents for iridescent reagents;

[0061] (2) In terms of viscosity, ethyl cellulose and white petroleum resins are better than acrylic resins and polyurethane resins.

[0062] (3) The appropriate proportion of thickener added is in the range of 0.2% to 0.3%.

[0063] Subsequent tests selected turpentine oil and turpentine alcohol as diluents and ethyl cellulose and white petroleum resin as thickeners, with an addition ratio of 0.2% to 0.3%, and redesigned tests for screening.

[0064] II. Thickener Dosage Screening Test

[0065] 1. Experimental objective:

[0066] By experimenting with different diluent ratios and the appropriate proportions of thickener added internally, a diluent and thickener for the iridescent reagent that are more suitable for making iridescent enamel plates were prepared.

[0067] 2. Test conditions:

[0068] Experimental materials: turpentine, terpineol, ethyl cellulose, white petroleum resin, iridescent reagent, 500*500 white enamel base plate;

[0069] Test temperature: room temperature;

[0070] Experimental apparatus: beaker, glass rod.

[0071] 3. Experimental Procedure:

[0072] According to the groups in Table 3 below, mix the diluent and thickener, stir well, and obtain the mixed reagent.

[0073] Table 3 Grouping of Mixed Reagents

[0074] Group diluent Thickener 1 100% turpentine Ethyl cellulose 0.1% + white petroleum resin 0.2% 2 100% turpentine Ethyl cellulose 0.2% + white petroleum resin 0.1% 3 100% terpineol Ethyl cellulose 0.1% + white petroleum resin 0.2% 4 100% terpineol Ethyl cellulose 0.2% + white petroleum resin 0.1%

[0075] (1) The four mixed reagents were titrated with water in the same equipment for 1 minute. The comparative viscosity of the mixed reagents was measured by referring to the flow rate of water using a simplified titration method. The results are shown in Table 4.

[0076] (2) The four mixed reagents were mixed with the iridescent reagent at a mass ratio of 1.1:1 to obtain the iridescent reagent. The air pressure was adjusted to 0.45MPa and the gun distance was about 350mm. The iridescent reagent was then sprayed onto a specific enamel plate, and the powder application and construction performance were observed.

[0077] 4. Experimental data:

[0078] (1) Comparative viscosity

[0079] Table 4 Comparative Viscosities of Mixed Reagents

[0080] Group water 1 2 3 4 Volume (mL) 100 68 65 67 68

[0081] (2) The spraying performance was good. After standing for 30 seconds, Group 1 and Group 3 showed the phenomenon of dripping at the bottom of the plate.

[0082] 5. Data Analysis:

[0083] In terms of operational performance, the viscosity of the four mixed solvents was similar, but when sprayed after mixing with the iridescent reagent, the residence time of Group 1 and Group 3 was insufficient, which easily caused sagging and resulted in poor iridescent effect. This indicates that among the same diluents, ethyl cellulose has a better viscosity than white petroleum resin.

[0084] 6. Experimental Conclusions:

[0085] Through comprehensive testing, the thickener has been determined to be 0.2% ethyl cellulose + 0.1% white petroleum resin. However, whether to use turpentine or terpineol as a diluent requires final confirmation through overall testing.

[0086] III. Screening Test for Diluent Types

[0087] 1. Experimental objective:

[0088] By experimenting with different diluent ratios and the appropriate proportions of thickener added internally, a diluent and thickener for the iridescent reagent that are more suitable for making iridescent enamel plates were prepared.

[0089] 2. Test conditions:

[0090] Experimental materials: turpentine, terpineol, ethyl cellulose, white petroleum resin, iridescent reagent, 500*500 white enamel base plate;

[0091] Test temperature: room temperature;

[0092] Experimental apparatus: beaker, glass rod, muffle furnace.

[0093] 3. Experimental Procedure:

[0094] According to the groups in Table 5 below, mix the diluent and thickener, stir well, and obtain the mixed reagent.

[0095] Table 5 Grouping of Mixed Reagents

[0096] Group diluent Thickener 1 100% turpentine Ethyl cellulose 0.2% + white petroleum resin 0.1% 2 100% terpineol Ethyl cellulose 0.2% + white petroleum resin 0.1%

[0097] Two mixed reagents were mixed with the iridescent reagent at a mass ratio of 1.1:1 to obtain the iridescent reagent. The iridescent reagent was then sprayed onto a specific enamel panel with an air pressure of 0.45 MPa and a spray gun distance of approximately 350 mm. The powder adhesion and application performance were observed. After spraying and drying for 10 minutes, the yellow phase was within the range of 12-14, allowing for production firing. A yellow phase below 12 indicated insufficient iridescent reagent thickness requiring additional spraying, while a yellow phase above 14 indicated excessive iridescent reagent thickness requiring cleaning and removal. The firing process after drying was 500℃ for 8 minutes, and the final effect of the iridescent enamel panel was observed.

[0098] 4. Experimental data:

[0099] The iridescent effect of the finished iridescent enamel panels was good, with only one group showing a small number of white bubbles (2).

[0100] 5. Data Analysis:

[0101] Through a series of comparative experiments, the final composition of the iridescent reagent was basically determined.

[0102] 6. Experimental Conclusions:

[0103] Through a series of experiments, the most suitable components for the new iridescent reagent used in iridescent enamel panels were determined to be: diluent: 100% terpineol, thickener: 0.2% ethyl cellulose + 0.1% white petroleum resin. Subsequent adjustments to the production process for iridescent enamel panels led to the optimal production solution.

[0104] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for preparing a polychrome enamel plate, characterized in that, Specifically, the following steps are included: (1) Mix the diluent and thickener at a mass ratio of 100:0.3 and stir until homogeneous to obtain a mixed reagent; The diluent is terpineol; the thickener is ethyl cellulose and white petroleum resin; the mass ratio of ethyl cellulose and white petroleum resin is 2:

1. (2) Mix the iridescent reagent and the mixed reagent at a mass ratio of 1:1.1 and stir until homogeneous to obtain the compound iridescent reagent; (3) Adjust the air pressure to 0.45MPa and the gun distance to 350mm, spray the compound iridescent reagent onto the enamel base plate, and dry it; The drying time is 10 minutes; (4) The enamel plate with a yellow phase in the range of 12-14 after spraying and drying is fired to obtain the iridescent enamel plate. The firing temperature is 500℃ and the firing time is 8 minutes.