Glass silicate dirt and obstinate stain remover

Abstract

The invention relates to a glass silicate dirt and obstinate stain remover, and belongs to the technical field of cleaning materials. The remover comprises the following raw materials in percentage by mass: 1.1-30% of an acidic fluoride composition, 0.1-20% of a fluorine-free acidic auxiliary agent, 0.5-60% of a mineral friction agent, 1-15% of a humectant, 0.1-3% of a thickening agent, 0.01-3% of a corrosion inhibitor, 0.2-21% of a surfactant, 0.1-5% of a chelating agent and the balance of water, and the sum of the mass fractions of the components is 100%. Wherein the acidic fluoride composition is composed of hydrofluoric acid and sodium fluoride. The glass silicate dirt and obstinate stain remover can effectively remove silicate dirt and obstinate stains on glass, does not corrode the glass, and also has a relatively long period of validity.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning materials, in particular to a glass silicate scale stubborn stain remover. Background Art

[0002] With the rapid development of modern industry and daily life, glass products are widely used in many fields such as architecture, automobiles, optical instruments, electronic equipment and daily life. However, during use, stubborn stains such as silicate scale are often deposited on the glass surface. These stains not only affect the appearance, but also may have an adverse effect on the functionality and service life of the glass. The silicate scale on the glass is very difficult to remove. Conventional detergents, even those containing strong acids (hydrochloric acid, sulfuric acid) are ineffective. The only acid that can solve the silicate scale (hydrofluoric acid) will corrode the glass at the same time. This contradiction has become a difficult problem for cleaning. Traditional cleaning methods are often difficult to completely remove these stubborn stains, and may cause damage to the glass surface. Therefore, it is particularly important to develop an efficient, safe and environmentally friendly glass silicate scale stubborn stain remover. Summary of the invention

[0003] The object of the present invention is to overcome the deficiencies of the prior art and provide a glass silicate scale stubborn stain remover.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] In a first aspect, the present invention provides a glass silicate scale stubborn stain remover, the remover comprising the following raw materials in mass fractions: 1.1-30% acidic fluoride composition, 0.1-20% fluorine-free acidic auxiliary agent, 5.5-60% mineral abrasive, 1-15% moisturizer, 0.1-3% thickener, 0.01-3 corrosion inhibitor, 0.2-21% surfactant, 0.1-5% chelating agent and water, the water makes up the balance, and the sum of the mass fractions of each component is 100%; wherein the acidic fluoride composition is composed of hydrofluoric acid and sodium fluoride.

[0006] The acidic fluoride composition plays a major role in descaling in the remover of the present invention. The fluorine-free acidic auxiliary agent plays a role in strengthening the acidity in the remover of the present invention. After the acidic fluoride composition is reduced by the dirt reaction, it plays a role in supplementing hydrogen ions, and at the same time, it has a cleaning effect on calcium carbonate scale. The mineral abrasive plays the role of abrasive, buffer, and filler in the remover of the present invention. At the same time, it can also react with the acidic fluoride combination to form a buffering effect. The moisturizing agent plays a moisturizing role in the remover of the present invention, which can make the remover not easy to dry during use. Keeping it moist can make the reaction proceed better. The thickener mainly plays a thickening role in the remover of the present invention, increasing the viscosity to stabilize the system. The corrosion inhibitor plays the role of corrosion-inhibiting glass in the remover of the present invention. The surfactant plays a role in strengthening spreading and wetting in the remover of the present invention. The chelating agent plays a chelating and pH buffering role in the remover of the present invention.

[0007] The present invention obtains a kind of agent that can effectively remove stubborn stains such as silicate scale on the glass surface by selecting the above-mentioned specific components and matching them in a proportion, without causing damage to the glass surface, and maintaining the transparency and glossiness of the glass. The glass silicate scale stubborn stain remover has strong cleaning power, low corrosiveness, and a long effective period.

[0008] As a preferred embodiment of the present invention, the concentration of the hydrofluoric acid is 40%, and the mass fraction is 1-20%; or / and, the mass fraction of the sodium fluoride is 0.1-10%.

[0009] The present invention has found that the selection of the type of acidic fluoride composition can affect the cleaning performance and corrosiveness of the remover of the present invention. Although the use of a single component hydrofluoric acid can remove silicate scale, the single component is too corrosive and forms corrosion (white spots) on the glass, which loses the meaning of cleaning. Therefore, the present invention has found through many studies that the combined use of hydrofluoric acid and sodium fluoride can greatly reduce the corrosive effect compared with a single component. In the acidic fluoride composition of the present invention, 40% hydrofluoric acid is used as the main descaling agent, and sodium fluoride is used as a buffer and auxiliary agent to reduce the corrosive effect of hydrofluoric acid. Therefore, hydrofluoric acid and sodium fluoride are selected to combine to balance the cleaning and corrosion of hydrofluoric acid on the glass, which can remove stains and protect the glass from corrosion.

[0010] As a preferred embodiment of the present invention, the mass ratio of hydrofluoric acid to sodium fluoride is: hydrofluoric acid: sodium fluoride = (6-7): 1. More preferably, the mass ratio of hydrofluoric acid to sodium fluoride is: 6.7:1.

[0011] The present invention has found that when the mass ratio of hydrofluoric acid to sodium fluoride is limited to the range of (6-7):1, the cleaning power and corrosiveness of the remover of the present invention are better balanced. When the mass ratio of hydrofluoric acid to sodium fluoride is 6.7:1, the cleaning power and low corrosiveness of the remover are optimal.

[0012] As a preferred embodiment of the present invention, the mineral friction agent comprises silicon dioxide and barium sulfate; wherein the mass fraction of the silicon dioxide is 0.5-10%, and the mass fraction of the barium sulfate is 5-50%.

[0013] The present invention has found that silicon dioxide can react with the acidic fluoride combination as a friction agent to form a buffering effect, but silicon dioxide should not be used in too much amount, as too much silicon dioxide will make the acidic fluoride combination ineffective. Therefore, its mass fraction is limited to 0.5-10%, which can be used as a friction agent without making the acidic fluoride combination ineffective, and plays a certain buffering role, which is conducive to reducing the corrosiveness of hydrofluoric acid. The present invention selects barium sulfate as another friction agent because barium sulfate is a mineral that does not react with hydrofluoric acid and is the most excellent filling material in the remover of the present invention. Therefore, when silicon dioxide and barium sulfate are selected as the friction agents of the present invention, the remover of the present invention can be kept in a paste state, and its cleaning ability can be improved and its corrosiveness can be reduced.

[0014] As a preferred embodiment of the present invention, the mass ratio of fluoride ions to silicon dioxide in the acidic fluoride composition is (1-7): 1. Exemplarily, the mass ratio of fluoride ions to silicon dioxide in the acidic fluoride composition may be 1:1, 2:1, 3:1, 5:1, 6:1, 7:1.

[0015] Preferably, the mass ratio of fluoride ions to silicon dioxide in the acidic fluoride composition is (5-6):1.

[0016] The present invention finds that the mass ratio of fluoride ions to silicon dioxide in the acidic fluoride composition affects the cleaning ability and corrosiveness of the remover. According to research, within the above preferred ratio range, the remover of the present invention has a cleaning effect and low corrosiveness.

[0017] As a preferred embodiment of the present invention, the molar concentration ratio of the fluoride ions in the acidic fluoride composition to the hydrogen ions in the fluorine-free acidic auxiliary agent is (5-11):1.

[0018] The present invention finds that the molar concentration ratio of the fluoride ions of the acidic fluoride composition to the hydrogen ions of the acidic auxiliary agent containing no fluoride affects the cleaning ability and corrosivity of the remover. According to research, within the above preferred ratio range, the remover of the present invention has a cleaning effect and low corrosivity. At the same time, the present invention finds that the molar concentration ratio of the fluoride ions of the acidic fluoride composition to the hydrogen ions of the acidic auxiliary agent containing no fluoride is within the above range, which can also improve its long-term effectiveness.

[0019] As a preferred embodiment of the present invention, the fluorine-free acidic auxiliary agent is hydrochloric acid with a mass concentration of 30-37%. Exemplarily, the mass concentration of the hydrochloric acid can be any value or a range of 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%.

[0020] In the present invention, hydrochloric acid plays a role in strengthening acidity and descaling, and plays a role in supplementing hydrogen ions after hydrogen fluoride is reduced by the scale reaction. At the same time, it can also clean the calcium carbonate scale that may exist. In addition, the presence of hydrochloric acid can also extend the shelf life of the remover paste of the present invention. Hydrochloric acid with a mass concentration of 30-37% can achieve the purpose of the present invention.

[0021] As a preferred embodiment of the present invention, the surfactant comprises dodecylbenzenesulfonic acid and cocamidopropyl hydroxysulfonate, wherein the mass fraction of the dodecylbenzenesulfonic acid is 0.1-10%, and the mass fraction of the cocamidopropyl hydroxysulfonate is 0.1-11%.

[0022] The present invention selects dodecylbenzenesulfonic acid and cocamidopropyl hydroxysulfonyl betaine as the surfactant of the present invention because the two play a synergistic role in enhancing spreading and wetting, not only having better spreading properties, but also being acid-resistant, and also having a corrosion-inhibiting effect.

[0023] As a preferred embodiment of the present invention, the humectant includes one or more of glycerol, 1,2-propylene glycol, dipropylene glycol, ethylene glycol, diethylene glycol, polyethylene glycol 200, polyethylene glycol 300, polyethylene glycol 400, and polyethylene glycol 600; or / and, the thickener includes one or more of xanthan gum, xanthan gum, and oleyl alcohol polyoxyethylene ether; or / and, the corrosion inhibitor includes one or more of benzotriazole sodium salt, methylbenzotriazole, and iron oxide; or / and, the chelating agent includes one or more of sodium gluconate, trisodium methylglycine diacetate, tetrasodium glutamate diacetate, hydroxyethylidene diphosphonic acid, disodium hydroxyethylidene diphosphonic acid, and tetrasodium hydroxyethylidene diphosphonic acid.

[0024] As a preferred embodiment of the present invention, the remover includes the following raw materials: 1-20% hydrofluoric acid with a concentration of 40%, 0.1-10% sodium fluoride, 0.1-20% hydrochloric acid with a concentration of 34%, 1-15% glycerol, 0.1-3% xanthan gum, 0.01-3% sodium benzotriazole, 0.1-5% tetrasodium glutamate diacetate, 0.5-10% silicon dioxide, 5-50% barium sulfate, 0.1-10% dodecylbenzenesulfonic acid, 0.1-11% cocamidopropyl hydroxysulfonate, and water, the water makes up the balance, and the sum of the mass fractions of each component is 100%.

[0025] Exemplarily, the mass percentage of hydrofluoric acid with a concentration of 40% can be any value or range value among 1%, 2%, 4%, 6%, 8%, 10%, 12%, 14%, 15%, 16%, 18%, 20%. The mass percentage of sodium fluoride can be any value or range value among 0.1%, 0.5%, 0.8%, 1%, 2%, 4%, 6%, 8%, 10%. The mass percentage of hydrochloric acid with a concentration of 34% can be any value or range value among 0.1%, 0.5%, 0.8%, 1%, 2%, 4%, 6%, 8%, 10%, 12%, 14%, 15%, 16%, 18%, 20%. The mass percentage of glycerol can be any value or range value among 1%, 2%, 4%, 6%, 8%, 10%, 12%, 14%, 15%. The mass percentage of xanthan gum can be any value or range value among 0.1%, 0.5%, 0.8%, 1%, 2%, 3%. The mass percentage of benzotriazole sodium salt can be any value or range value among 0.01%, 0.02%, 0.04%, 0.06%, 0.08%, 1%, 1.2%, 1.4%, 1.6%, 1.8%, 2%, 2.2%, 2.4%, 2.6%, 2.8%, 3%. The mass percentage of tetrasodium glutamate diacetate can be any value or range value among 0.1%, 0.5%, 0.8%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%. The mass percentage of silicon dioxide can be any value or range of 0.5%, 0.8%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%. The mass percentage of barium sulfate can be any value or range of 5%, 8%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%. The mass percentage of dodecylbenzenesulfonic acid can be any value or range of 0.1%, 0.5%, 0.8%, 1%, 2%, 4%, 6%, 8%, 10%. The mass percentage of cocamidopropyl hydroxysulfonyl betaine can be any value or range of 0.1%, 0.5%, 0.8%, 1%, 2%, 4%, 6%, 8%, 10%, 11%.

[0026] After optimization, the present invention obtains the best raw material formula of the remover as described above, and when each raw material is limited to the above range, the low corrosion, cleaning power, shelf life and paste state comprehensive performance of the remover of the present invention are improved.

[0027] Preferably, the remover comprises the following raw materials in mass fraction: 3-15% hydrofluoric acid with a concentration of 40%, 0.1-5% sodium fluoride, 1-10% hydrochloric acid with a concentration of 34%, 2-12% glycerol, 0.2-2% xanthan gum, 0.01-1% sodium benzotriazole, 1-3% tetrasodium glutamate diacetate, 0.5-6% silicon dioxide, 30-50% barium sulfate, 0.1-5% dodecylbenzenesulfonic acid, 1-6% cocamidopropyl hydroxysulfonate, and water, with water making up the balance, and the sum of the mass fractions of each component is 100%.

[0028] After optimization, the present invention obtains the best raw material formula of the remover as described above, and when each raw material is limited to the above range, the remover of the present invention has better comprehensive performance effects in terms of low corrosiveness, cleaning power, shelf life and paste state.

[0029] More preferably, the remover comprises the following raw materials in mass fractions: 10% hydrofluoric acid with a concentration of 40%, 1.5% sodium fluoride, 3% hydrochloric acid with a concentration of 34%, 8% glycerol, 0.4% xanthan gum, 0.1% sodium benzotriazole, 1.5% tetrasodium glutamate diacetate, 2% silicon dioxide, 38% barium sulfate, 1% dodecylbenzenesulfonic acid, 3% cocamidopropyl hydroxysulfonate, and water, with water making up the balance, and the sum of the mass fractions of each component is 100%.

[0030] After optimization, the present invention obtains the best raw material formula of the remover as described above, and when each raw material is limited to a more preferred scheme, the low corrosiveness, cleaning power, shelf life and paste state of the remover of the present invention are optimal.

[0031] In a second aspect, the present invention provides a method for preparing the glass silicate scale stubborn stain remover according to the first aspect, comprising the following steps:

[0032] (1) Mix xanthan gum and glycerin into a slurry, add water, and stir evenly to form a viscous liquid 1;

[0033] (2) adding sodium benzotriazole, dodecylbenzenesulfonic acid, cocamidopropyl hydroxysulfobetaine, tetrasodium glutamate diacetate, 40% hydrofluoric acid, sodium fluoride, and 34% hydrochloric acid to the viscous liquid 1 of step (1) one by one, stirring evenly to form a viscous liquid 2;

[0034] (3) adding barium sulfate and silicon dioxide into the viscous liquid 2 of step (2), stirring evenly, and obtaining a milky white or light yellow paste, that is, obtaining the glass silicate scale stubborn stain remover.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] The present invention aims to provide a glass silicate scale stubborn stain remover in the form of a paste, which can efficiently remove stubborn stains such as silicate scale on the glass surface, while not causing damage to the glass surface, and maintaining the transparency and glossiness of the glass. In the present invention, a variety of buffering methods (adding sodium fluoride, adding silicon dioxide, adding alkaline chelating additives) are used together to make hydrofluoric acid effective without causing corrosion. The remover of the present invention adopts a unique formula and preparation process, combines advanced chemical cleaning technology and environmental protection concepts, and provides a new solution for the field of glass cleaning.

[0037] During the research and development process, we deeply analyzed the formation mechanism and characteristics of silicate scale, screened out a series of highly effective decontamination components and additives through a large number of experiments, and finally obtained the glass silicate scale stubborn stain remover of the present invention after optimizing the ratio and adjusting the process. The remover has the advantages of strong decontamination power, convenient use, safety and environmental protection, etc. It can be widely used in the cleaning and maintenance of various glass products, and has broad market prospects and application value. DETAILED DESCRIPTION

[0038] In order to better illustrate the purpose, technical scheme and advantages of the present invention, the present invention will be further described below in conjunction with specific examples. The materials, reagents, etc. used in the examples, unless otherwise specified, can all be obtained from commercial sources.

[0039] 40% hydrofluoric acid configuration: industrial grade

[0040] 34% hydrochloric acid configuration: industrial grade

[0041] The mass percentages of the components in the removers in Examples 1-17 and Comparative Examples 1-14 are shown in Table 1:

[0042] Table 1:

[0043]

[0044]

[0045] Embodiment 1 also provides a method for preparing a glass silicate scale stubborn stain remover, comprising the following steps:

[0046] (1) Mix xanthan gum and glycerin in advance according to the addition amount in Table 1 into a slurry, add soft water, stir evenly, and allow the xanthan gum to swell to form a liquid 1 with a certain viscosity;

[0047] (2) adding sodium benzotriazole, dodecylbenzenesulfonic acid (Ia), cocamidopropyl hydroxysulfobetaine (CSB), tetrasodium glutamate diacetate, 40% hydrofluoric acid, sodium fluoride, and 34% hydrochloric acid to the liquid 1 having a certain viscosity in step (1) one by one according to the addition amount in Table 1, and stirring evenly to form a uniform liquid 2 having a certain viscosity;

[0048] (3) Add barium sulfate and silicon dioxide in the amounts shown in Table 1 to the liquid 2 of the viscosity of step (2), stir evenly, and obtain a glass silicate scale stubborn stain remover in the form of a milky white or light yellow paste.

[0049] Test example:

[0050] The cleaning ability, corrosivity and shelf life of the removers prepared in Examples 1-17 and Comparative Examples 1-14 were tested. The specific testing methods are as follows. The results are shown in Table 2:

[0051] 1. Cleaning ability test method: The cleaning object is a train glass with uniform large silicate scale, and several samples are compared at the same time. Apply an appropriate amount of the remover of the present invention on the glass surface, wait for 5 minutes, and then rinse with water. The evaluation is based on the appearance and touch comparison. The evaluation criteria are:

[0052] Compare the percentage of area covered by stubborn stains on the glass before and after cleaning, with 100% removal being 10 points, 90% removal being 9 points, and so on, until 10% removal being 1 point; from 0-10 points, with a full score of 10 points.

[0053] 2. Corrosion test method: Use a commercially available experimental slide and immerse it in the remover of the present invention for 5 minutes. After the time is up, take it out and immediately rinse it with clean water. Score it by observing the white spots and corrosion formation on the immersed part. The scoring criteria are:

[0054] (1) The degree of light transmittance after the formation of white fog corrosion is judged as follows: extremely severe white fog is 0-0.5 points; severe white fog is 1-1.5 points; moderate white fog is 2-2.5 points; and mild white fog is 3-3.5 points;

[0055] (2) For the formation of white spot corrosion, according to the percentage of the area of ​​the white spot distribution, 100%-70% is 4-4.5 points; 69%-50% is 5-5.5 points; 49%-30% is 6-6.5 points; 29%-20% is 7-7.5 points; 19%-10% is 8-8.5 points; 9%-1% is 9-9.5 points;

[0056] (3) Corrosion cannot be determined by the naked eye, which is 9.5-10 points.

[0057] The more severe the corrosion, the lower the score, from 0 to 10, with no signs of corrosion being 10 points.

[0058] 3. Validity period test method: Place the sample in a cool and dark place at room temperature of 10-30℃ for 200 days, take samples every 10 days to test the cleaning ability, and score according to the cleaning ability test method. If it is lower than 50% of the initial test score, it is considered invalid, and if it is still higher than 50%, it is considered valid. Record the last valid days. Every 10 days is recorded as 0.5 points, that is, 1 point every 20 days, and 200 days and above are recorded as 10 points.

[0059] 4. Paste state evaluation method: Take 5 grams of sample and put it into a 10ml centrifuge tube, centrifuge it at 2000rpm for 5 minutes in a centrifuge. Observe the solid-liquid separation after taking it out. If all the powder is deposited at the bottom of the centrifuge tube and the solid-liquid surface is clearly distinguishable, it is recorded as 0 points; if the solid-liquid surface is slightly blurred, but the solid and liquid parts can still be distinguished, and the liquid part is only slightly turbid, it is recorded as 0.5-1.5 points; if the blurriness of the solid-liquid surface deepens, the liquid part is moderately turbid, but the solid and liquid parts can still be vaguely distinguished, it is recorded as 2-4 points; if the blurriness of the solid-liquid surface is high, the liquid part is obviously turbid, and the solid and liquid parts are difficult to distinguish clearly, it is recorded as 4.5-7.5 points; if the solid-liquid surface is almost completely difficult to distinguish, and the liquid part is highly turbid, it is recorded as 8-9.5 points; if the solid-liquid surface is completely indistinguishable and the liquid part is extremely turbid, it is recorded as 10 points.

[0060] Table 2:

[0061]

[0062]

[0063] As can be seen from the above table, the general effect of the embodiment is better than that of the comparative example. This is because the remover of the present invention selects specific components and dosages to effectively remove stubborn stains such as silicate scale on the glass surface without causing damage to the glass surface, and can also extend the validity period, and the paste state is also good.

[0064] As shown in Comparative Example 1, adding too much silicon dioxide will reduce its cleaning power and validity period; as shown in Comparative Example 2, lack of silicon dioxide will increase the corrosiveness of the remover; as shown in Comparative Example 3, too little content of the fluorine-containing composition will reduce the cleaning power and validity period of the remover; as shown in Comparative Example 4, lack of hydrochloric acid will reduce the validity period of the remover; as shown in Comparative Example 5, lack of sodium fluoride will reduce the cleaning power and validity period of the remover; as shown in Comparative Example 6, lack of glycerol will affect the cleaning power and validity period of the remover and the state of the paste; as shown in Comparative Example 7, lack of xanthan gum will affect The state of the remover paste; from Comparative Example 8, it can be seen that the lack of tetrasodium glutamate diacetate will affect the corrosiveness and the state of the paste of the remover; from Comparative Example 9, it can be seen that adding excessive tetrasodium glutamate diacetate will affect the cleaning power, validity period and paste state of the remover; from Comparative Example 10, it can be seen that the lack of surfactant dodecylbenzenesulfonic acid will affect the state of the remover paste; from Comparative Example 11, it can be seen that the lack of surfactant cocamidopropyl hydroxysulfonate will affect the state of the remover paste; from Comparative Example 12, it can be seen that the lack of barium sulfate will affect the state of the remover paste.

[0065] Therefore, from the results of comparative examples 3-5, 40% hydrofluoric acid, 34% hydrochloric acid, and sodium fluoride are all factors that affect the cleaning power and validity period of the remover, and the lack of any one of them can lead to a reduction in the cleaning power of the remover and shorten its validity period. It can be seen that 40% hydrofluoric acid, 34% hydrochloric acid, and sodium fluoride play a synergistic role in the cleaning power and validity period of the remover in the present invention, and compounding them in a specific ratio can improve the cleaning ability of the remover and extend its validity period.

[0066] From the results of Comparative Examples 6, 7, 10-12, glycerol, xanthan gum, dodecylbenzenesulfonic acid, cocamidopropyl hydroxysulfonyl betaine, and barium sulfate are all factors that affect the paste state of the remover, and the lack of any one of them can lead to a poor paste state. It can be seen that glycerol, xanthan gum, dodecylbenzenesulfonic acid, cocamidopropyl hydroxysulfonyl betaine, and barium sulfate play a synergistic role in the state of the paste in the present invention, and compounding them in a specific ratio can play a role in stabilizing the paste state.

[0067] It can be seen from Comparative Examples 13-14 that the formula of the remover of the present invention is specifically formulated, and the effect of the present invention can be achieved only when the content ratio of each component is within the scope of the present invention. The content ratio of each component in Comparative Examples 13-14 is not within the scope of the present invention. Therefore, its corrosion performance, cleaning strength, validity period and paste state are not as good as the embodiments of the present invention.

[0068] In summary, it can be seen from the results of the above embodiments and comparative examples that each component in the remover formula of the present invention is indispensable, otherwise it will affect its cleaning power, low corrosiveness, shelf life and paste state.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A glass silicate scale stubborn stain remover, characterized in that: The remover comprises the following raw materials by mass fraction: 1.1-30% acidic fluoride composition, 0.1-20% fluorine-free acidic auxiliary agent, 5.5-60% mineral friction agent, 1-15% moisturizing agent, 0.1-3% thickener, 0.01-3 corrosion inhibitor, 0.2-21% surfactant, 0.1-5% chelating agent and water, the water makes up the balance, and the sum of the mass fractions of each component is 100%; wherein the acidic fluoride composition is composed of hydrofluoric acid and sodium fluoride.

2. The glass silicate scale stubborn stain remover according to claim 1, characterized in that: The concentration of the hydrofluoric acid is 40%, and the mass fraction is 1-20%; or / and, the mass fraction of the sodium fluoride is 0.1-10%.

3. The glass silicate scale stubborn stain remover according to claim 1, characterized in that: The mineral friction agent comprises silicon dioxide and barium sulfate; wherein the mass fraction of the silicon dioxide is 0.5-10%, and the mass fraction of the barium sulfate is 5-50%.

4. The glass silicate scale stubborn stain remover according to claim 1, characterized in that: The mass ratio of fluoride ions to silicon dioxide in the acidic fluoride composition is (1-7):

1.

5. The glass silicate scale stubborn stain remover according to claim 1, characterized in that: The fluorine-free acidic auxiliary agent is hydrochloric acid with a mass concentration of 30-37%.

6. The glass silicate scale stubborn stain remover according to claim 1, characterized in that: The surfactant comprises dodecylbenzenesulfonic acid and cocamidopropylhydroxysulfonyl betaine; wherein the mass fraction of the dodecylbenzenesulfonic acid is 0.1-10%, and the mass fraction of the cocamidopropylhydroxysulfonyl betaine is 0.1-11%.

7. The glass silicate scale stubborn stain remover according to claim 1, characterized in that: The moisturizing agent includes one or more of glycerin, 1,2-propylene glycol, dipropylene glycol, ethylene glycol, diethylene glycol, polyethylene glycol 200, polyethylene glycol 300, polyethylene glycol 400, and polyethylene glycol 600; or / and, The thickener includes one or more of xanthan gum, xanthan gum, and oleyl alcohol polyoxyethylene ether; or / and, The corrosion inhibitor includes one or more of sodium benzotriazole, toluene triazole, and iron oxide; or / and, The chelating agent includes one or more of sodium gluconate, trisodium methylglycine diacetate, tetrasodium glutamate diacetate, hydroxyethylidene diphosphonic acid, disodium hydroxyethylidene diphosphonic acid, and tetrasodium hydroxyethylidene diphosphonic acid.

8. The glass silicate scale stubborn stain remover as claimed in claim 7, characterized in that: The remover comprises the following raw materials by mass fraction: 1-20% of 40% hydrofluoric acid, 0.1-10% of sodium fluoride, 0.1-20% of 34% hydrochloric acid, 1-15% of glycerol, 0.1-3% of xanthan gum, 0.01-3% of benzotriazole sodium salt, 0.1-5% of tetrasodium glutamate diacetate, 0.5-10% of silicon dioxide, 5-50% of barium sulfate, 0.1-10% of dodecylbenzenesulfonic acid, 0.1-11% of cocamidopropyl hydroxysulfonyl betaine, and water, the water makes up the balance, and the sum of the mass fractions of each component is 100%.

9. The glass silicate scale stubborn stain remover according to claim 8, characterized in that: The remover comprises the following raw materials by mass fraction: 3-15% of 40% hydrofluoric acid, 0.1-5% of sodium fluoride, 1-10% of 34% hydrochloric acid, 2-12% of glycerol, 0.2-2% of xanthan gum, 0.01-1% of sodium benzotriazole, 1-3% of tetrasodium glutamate diacetate, 0.5-6% of silicon dioxide, 30-50% of barium sulfate, 0.1-5% of dodecylbenzenesulfonic acid, 1-6% of cocamidopropyl hydroxysulfonate, and water, the water makes up the balance, and the sum of the mass fractions of each component is 100%.

10. A method for preparing the glass silicate scale stubborn stain remover as claimed in claim 8 or 9, characterized in that: The steps include: (1) Mix xanthan gum and glycerin into a slurry, add water, and stir evenly to form a viscous liquid 1; (2) adding sodium benzotriazole, dodecylbenzenesulfonic acid, cocamidopropyl hydroxysulfobetaine, tetrasodium glutamate diacetate, 40% hydrofluoric acid, sodium fluoride, and 34% hydrochloric acid to the viscous liquid 1 of step (1) one by one, stirring evenly to form a viscous liquid 2; (3) adding barium sulfate and silicon dioxide into the viscous liquid 2 of step (2), stirring evenly, and obtaining a milky white or light yellow paste, that is, obtaining the glass silicate scale stubborn stain remover.

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