CN114181788A

CN114181788A - Glass cleaning agent and preparation method and application thereof

Info

Publication number: CN114181788A
Application number: CN202111416205.4A
Authority: CN
Inventors: 陈建章
Original assignee: Wanjin Industrial Chibi Co Ltd
Current assignee: Wanjin Industrial Chibi Co Ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-03-15

Abstract

The invention provides a glass cleaning agent and a preparation method and application thereof, wherein the glass cleaning agent comprises the following components in percentage by weight: 3 to 10 percent of citric acid, 3 to 8 percent of citrate, 0 to 2 percent of thickening agent, 0.05 to 1 percent of anionic surfactant, 0.05 to 1 percent of cationic surfactant, 0.05 to 1 percent of nonionic surfactant, 0.1 to 2 percent of chelating agent, 0.1 to 2 percent of nitrate, 0.1 to 2 percent of hydrogen peroxide, 0.1 to 2 percent of cosolvent and the balance of water. The glass cleaning agent disclosed by the invention is a weakly acidic to weakly alkaline cleaning agent, has a good cleaning effect on polishing powder on the surface of glass, avoids the problems of bluing and black spots on the surface of the cleaned glass, and cannot cause adverse effects on the performance of the surface of the glass.

Description

Glass cleaning agent and preparation method and application thereof

Technical Field

The invention relates to the technical field of cleaning agents, and particularly relates to a glass cleaning agent and a preparation method and application thereof.

Background

In the production process of a glass element, in order to reduce the roughness of the glass surface, the surface of the glass needs to be polished. The conventional polishing method is to reduce the surface roughness of the polishing powder (mainly containing cerium oxide and a small amount of lanthanum oxide) by chemical mechanical polishing with the polishing powder as a medium.

The surface of the glass is usually polished by using polishing powder during the polishing process, and a part of the polishing powder remains on the surface of the glass after polishing. On one hand, the polishing powder particles remained on the surface of the glass element can corrode the surface of the glass element, for example, the polishing powder particles remained on the optical glass element after precision polishing are one of the key factors influencing the laser irradiation damage resistance of the element; on the other hand, after the glass component is assembled on the electronic product, the polishing powder remained on the surface of the glass component can seriously affect the stability and reliability of the electronic product, and even lead to the failure of the electronic product.

Most of traditional methods for cleaning glass element surface polishing powder adopt alkaline cleaning agents to clean the glass element surface, however, the removal effect of the alkaline cleaning agents on the glass element surface polishing powder is poor, and strong alkali can cause glass to be corroded and turn blue. Some technologies clean the glass elements by manually brushing and matching with various environment-friendly cleaning agents, but the glass elements need to be cleaned repeatedly, so that the pollution discharge is large and the material consumption is high; in addition, the manual brushing has uncertainty in operation, which inevitably causes fine scratches on the surface of the glass element, and further affects the performance of the glass element. In the prior art, the glass is cleaned by using an acid cleaning agent, but the acidity of the traditional acid cleaning agent is difficult to control and is too strong, so that the glass is easily scratched and blackened; too weak acid and poor cleaning effect.

Disclosure of Invention

Therefore, it is necessary to provide a glass cleaning agent, a preparation method and an application thereof, aiming at the problem that the traditional cleaning agent has poor cleaning effect on the glass surface polishing powder or can cause adverse effect on the glass performance.

According to one aspect of the invention, the glass cleaning agent is provided, and comprises the following components in percentage by weight: 3 to 10 percent of citric acid, 3 to 8 percent of citrate, 0 to 2 percent of thickening agent, 0.05 to 1 percent of anionic surfactant, 0.05 to 1 percent of cationic surfactant, 0.05 to 1 percent of nonionic surfactant, 0.1 to 2 percent of chelating agent, 0.1 to 2 percent of nitrate, 0.1 to 2 percent of hydrogen peroxide, 0.1 to 2 percent of cosolvent and the balance of water.

In some preferred embodiments, the glass cleaner comprises the following components: 3 to 8 percent of citric acid, 3 to 8 percent of citrate, 0.8 to 1.2 percent of thickening agent, 0.25 to 0.8 percent of anionic surfactant, 0.3 to 0.8 percent of cationic surfactant, 0.3 to 0.8 percent of nonionic surfactant, 0.5 to 1.2 percent of chelating agent, 0.5 to 1.2 percent of nitrate, 0.8 to 1.5 percent of hydrogen peroxide, 0.8 to 1.2 percent of cosolvent and the balance of water.

In some of these embodiments, the anionic surfactant is selected from at least one of fatty acid metal salts, alkylbenzene sulfonates, alkyl sulfonate salts, alkyl sulfonates, alkyl sulfates, fluorine-containing fatty acid salts, polysiloxanes, fatty alcohol sulfates, fatty alcohol polyoxyethylene ether sulfates, α -olefin sulfonates, fatty alcohol polyoxyethylene ether phosphates, alkylolamides, alkylsulfoacetamides, alkyl succinate sulfonates, alkylol amine alkylbenzene sulfonates, naphthenates, alkylphenol sulfonates, and polyoxyethylene monolaurates.

Preferably, the anionic surfactant is at least one of fatty alcohol polyoxyethylene ether sulfate and fatty alcohol polyoxyethylene ether phosphate.

In some of these embodiments, the nonionic surfactant is selected from at least one of fatty alcohol polyoxyethylene ether, octylphenol polyoxyethylene ether, nonylphenol polyoxyethylene ether, fatty acid polyoxyethylene ester, fatty acid methyl ester ethoxylate, ethylene oxide adduct of polypropylene glycol, ethylene glycol, glycerol pentaerythritol, sorbitan, and sucrose.

Preferably, the nonionic surfactant is at least one of nonylphenol polyoxyethylene ether and fatty acid polyoxyethylene ester.

In some of these embodiments, the cationic surfactant is a cationic polyacrylamide.

In some of these embodiments, the co-solvent is at least one of ethylene glycol, sodium benzoate, citric acid, soluble amide compounds.

In some of these embodiments, the thickener is an inorganic salt thickener.

Further, the inorganic salt thickener is at least one selected from the group consisting of sodium chloride, potassium chloride, ammonium chloride, monoethanolamine chloride, diethanolamine chloride, sodium sulfate, sodium phosphate, disodium phosphate, and pentasodium triphosphate.

Preferably, the inorganic salt thickener is at least one of sodium chloride and potassium chloride.

In some of these embodiments, the chelating agent is at least one of dibasic ethylene diphosphate, sodium ethylene diamine ditosylate acetate, and sodium gluconate.

In some of these embodiments, the citrate salt is at least one of sodium citrate and potassium citrate. Sodium citrate is preferred.

In some of these embodiments, the nitrate salt is at least one of sodium nitrate, potassium nitrate, and ammonium nitrate.

In some of the embodiments, the pH of the glass cleaning agent is 4-9.

According to another aspect of the invention, a preparation method of the glass cleaning agent is provided, which comprises the following steps:

the glass cleaning agent provided by the invention is prepared by providing each component and uniformly mixing the components.

According to another aspect of the invention, the application of the glass cleaning agent in cleaning polishing powder on the surface of glass is provided.

Compared with the prior art, the invention has the following beneficial effects:

the glass cleaning agent is formed by compounding components such as citric acid, citrate, hydrogen peroxide, nitrate, a thickening agent, an anionic surfactant, a cationic surfactant, a nonionic surfactant, a chelating agent, a cosolvent and the like in a specific ratio; the glass cleaning agent has the advantages that the citric acid and the citrate form a buffer system, so that the cleaning agent is maintained in a range from weak acidity to weak alkalinity, the service life of the cleaning agent is prolonged, and the glass cleaning agent from weak acidity to weak alkalinity has a good cleaning effect on polishing powder on the surface of glass through the synergistic effect of the citric acid, the citrate, the thickening agent, the nitrate, hydrogen peroxide and various surfactants in a specific ratio, so that the problem that the cleaned glass turns blue and black spots is solved, and the performance of the glass surface cannot be adversely affected.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings, which illustrate embodiments of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.

One embodiment of the present invention provides a glass cleaning agent.

The glass cleaning agent comprises the following components in percentage by weight: 3 to 10 percent of citric acid, 3 to 8 percent of citrate, 0 to 2 percent of thickening agent, 0.05 to 1 percent of anionic surfactant, 0.05 to 1 percent of cationic surfactant, 0.05 to 1 percent of nonionic surfactant, 0.1 to 2 percent of chelating agent, 0.1 to 2 percent of nitrate, 0.1 to 2 percent of hydrogen peroxide, 0.1 to 2 percent of cosolvent and the balance of water.

Most of the traditional methods for cleaning the polishing powder on the surface of the glass element adopt alkaline cleaning agents, but the removal effect of the polishing powder on the surface of the glass element is poor by using the alkaline cleaning agents, and the glass is corroded and blued by strong alkali. The acidic cleaning agent is used for cleaning the polishing powder on the surface of the glass, when the acidity of the cleaning agent is weak, the cleaning effect is not good, and when the acidity of the cleaning agent is strong, black spots are easy to generate on the surface of the glass.

In order to solve the problems, the glass cleaning agent disclosed by the invention adopts weak-acid citric acid and weak-alkaline citrate, and a buffer solution system is formed by matching the citric acid and the citrate, so that the glass cleaning agent is maintained in a pH range from weak acidity to weak alkalinity, wherein the pH range is 4-9, and the problems that the strong-alkaline cleaning agent causes glass to be bluish and the strong-acid cleaning agent causes glass to generate black spots are solved. Meanwhile, citric acid and citrate are matched to form a buffer solution system, so that the cleaning life of the glass cleaning agent can be ensured.

Furthermore, under the condition that a buffer solution system formed by weak acid citric acid and weak alkaline citrate is adopted and strong acid and strong alkali are not used, how to ensure that the weak acid to weak alkaline glass cleaning agent has good cleaning effect on the polishing powder on the surface of the glass is a technical problem to be solved.

Through further research by the inventor, the nitrate and hydrogen peroxide are added into the citric acid and citrate cleaning agent system, and the weight percentage of each component is controlled to be 3-10% of citric acid, 3-8% of citrate, 0.1-2% of nitrate and 0.1-2% of hydrogen peroxide, so that the whole cleaning agent presents weak acidity under the ionization of the citric acid, and the dissolution of the polishing powder can be accelerated under the action of the hydrogen peroxide and the nitrate. Through the synergistic effect of the components, the cleaning agent has good polishing powder cleaning effect.

Furthermore, the thickening agent is added into the cleaning agent, so that the viscosity of the cleaning agent can be improved, and the friction force between the glass and the cleaning agent is increased, thereby being more beneficial to removing polishing powder in the cleaning process. Meanwhile, the glass cleaning agent can further improve the cleaning effect of the glass cleaning agent on the polishing powder by adopting a certain proportion of anionic surfactant, cationic surfactant and nonionic surfactant for compounding and adding a certain amount of chelating agent.

In conclusion, the glass cleaning agent is formed by compounding the components such as citric acid, citrate, hydrogen peroxide, nitrate, a thickening agent, an anionic surfactant, a cationic surfactant, a nonionic surfactant, a chelating agent, a cosolvent and the like in a specific ratio, and the weak-acidic to weak-alkaline glass cleaning agent has a good cleaning effect on polishing powder on the surface of glass through the synergistic effect of the components. The cleaning agent can not cause the surface of the glass to generate blue or black spots after being used, and can not cause adverse effects on the quality and the performance of the glass.

In a preferred embodiment of the invention, the glass cleaning agent comprises the following components: 3 to 8 percent of citric acid, 3 to 8 percent of citrate, 0.8 to 1.2 percent of thickening agent, 0.25 to 0.8 percent of anionic surfactant, 0.3 to 0.8 percent of cationic surfactant, 0.3 to 0.8 percent of nonionic surfactant, 0.5 to 1.2 percent of chelating agent, 0.5 to 1.2 percent of nitrate, 0.8 to 1.5 percent of hydrogen peroxide, 0.8 to 1.2 percent of cosolvent and the balance of water. Under the proportion, the glass cleaning agent has better cleaning effect on the polishing powder on the surface of the glass.

In one specific example, the weight percentage of citric acid in the glass cleaner is 8%. The specificity and the chelation of the citric acid can effectively remove polishing powder on the surface of the glass and promote the cleaning of the glass. Research shows that when the content of citric acid in a cleaning agent system is too low, the acidity of the glass cleaning agent is insufficient, so that the cleaning capability of the cleaning agent is reduced, and the service life of the glass cleaning agent is shortened due to the low acid content; when the content of citric acid in the cleaning agent system is too high, the acidity in the cleaning agent is too high, partial black spots and scratches may be generated on the glass, and the residual citric acid on the surface of the glass also affects the subsequent tempering process. Studies have shown that the best results are obtained when the amount of citric acid is 8%.

The weight percentage of citrate is 5%. The addition of citrate and the coordination of citric acid form a buffer solution in a system, so that the increase of hydrogen ions in the cleaning agent can be effectively inhibited, the pH value of the cleaning agent is ensured not to have large fluctuation in the cleaning process, and the cleaning time of the cleaning agent is prolonged. In addition, citrate is used as a commonly used chelating agent to increase the cleaning ability of the cleaning agent. Research shows that when the dosage of the citrate is too large, the ionization of the citric acid can be inhibited to a greater extent, so that the hydrogen ion concentration in the solution is reduced, and the cleaning effect is reduced; when the amount of citrate is too low, the buffering effect of the buffer solution is reduced, and the lifetime of the detergent is reduced. The effect is best when the amount of the citrate is 5%.

The weight percentage of the thickener is 1%. The thickening agent can effectively improve the viscosity of the cleaning agent, increase the friction force between the cleaning agent and the glass polishing powder in the cleaning process and further enhance the cleaning effect of the cleaning agent. Experimental research shows that when 1 weight percent of thickening agent is added into a cleaning agent system, the cleaning effect of the cleaning agent on polishing powder can be better improved, and the viscosity of the cleaning agent is not too high.

In some of these embodiments, the thickener is an inorganic salt thickener. The surfactant forms micelles in the aqueous solution, the inorganic salt thickener serves as an electrolyte in the aqueous solution, the existence of the electrolyte can increase the association number of the surfactant micelles, the surfactant micelles are converted from spherical micelles to rod-shaped micelles, the movement resistance of the micelles is increased, and the viscosity of the system is increased.

Specifically, the inorganic salt thickener may be selected from a mixture of one or more of sodium chloride, potassium chloride, ammonium chloride, monoethanolamine chloride, diethanolamine chloride, sodium sulfate, sodium phosphate, disodium phosphate and pentasodium triphosphate. Preferably at least one of sodium chloride and potassium chloride. It is to be understood that the inorganic salt thickener is not limited to the above-listed kinds.

In some of these embodiments, the anionic surfactant may be selected from at least one of fatty acid metal salts, alkyl benzene sulfonates, alkyl sulfonate salts, alkyl sulfonates, alkyl sulfates, fluorine-containing fatty acid salts, polysiloxanes, fatty alcohol sulfates, fatty alcohol polyoxyethylene ether sulfates, α -olefin sulfonates, fatty alcohol polyoxyethylene ether phosphates, alkyl alcohol amides, alkyl sulfonic acetamides, alkyl succinate sulfonates, alcohol amine alkyl benzene sulfonates, naphthenates, alkyl phenol sulfonates, and polyoxyethylene monolaurates. Preferably at least one of fatty alcohol polyoxyethylene ether sulfate and fatty alcohol polyoxyethylene ether phosphate. It is to be understood that the anionic surfactant is not limited to the above-listed ones.

Nonionic surfactants are surfactants which are not ionized in aqueous solutions, the hydrophilic groups of which are composed mainly of a certain number of oxygen-containing groups, typically ether groups and hydroxyl groups. The nonionic surfactant has high stability, is not easily influenced by the existence of strong electrolyte inorganic salts, is not easily influenced by pH, and has good compatibility with other surfactants.

In some embodiments of the present invention, the nonionic surfactant may be selected from at least one of fatty alcohol polyoxyethylene ether, octylphenol polyoxyethylene ether, nonylphenol polyoxyethylene ether, fatty acid polyoxyethylene ester, fatty acid methyl ester ethoxylate, ethylene oxide adduct of polypropylene glycol, ethylene glycol, glycerol pentaerythritol, sorbitan, and sucrose. Preferably at least one of nonylphenol polyoxyethylene ether and fatty acid polyoxyethylene ester. Likewise, the nonionic surfactant is not limited to the above-listed ones.

In one specific example, the cationic surfactant is a cationic polyacrylamide. The anionic and cationic surfactants can respectively generate hydrophobic anions and cations in water, and the nonionic surfactant has higher emulsifying capacity; by compounding the anionic surfactant, the nonionic surfactant and the cationic surfactant, the cleaning effect of the glass cleaning agent on the glass surface polishing powder can be effectively improved.

In some of these embodiments, the citrate salt is at least one of sodium citrate and potassium citrate, preferably sodium citrate. The sodium citrate can well form a buffer system with the citric acid, so that the pH value of the glass cleaning agent is maintained in a relatively stable range, the stable cleaning effect of the polishing powder is ensured, and the glass cleaning agent has longer service life.

In some embodiments, the chelating agent can be a mixture of one or more of dibasic ethylene diphosphate, sodium ethylene diamine ditosylate acetate, and sodium gluconate. In the glass cleaning agent, EDTA or EDTA derivatives are not used as chelating agents, so that the phenomenon that EDTA and metal ions in glass generate complexation reaction to form dirt on the surface of the glass can be avoided.

In some of these embodiments, the nitrate salt is at least one of sodium nitrate, potassium nitrate, and ammonium nitrate. The sodium nitrate, the potassium nitrate, the ammonium nitrate and the hydrogen peroxide can generate a synergistic effect with the citric acid to accelerate the dissolution of polishing powder on the surface of the glass, so that the cleaning effect of the glass cleaning agent is effectively improved.

In some embodiments, the cosolvent is at least one of ethylene glycol, sodium benzoate, citric acid, and a soluble amide compound. By adding the cosolvent into the glass cleaning agent, all components of the cleaning agent can be fully mixed to form a solution system with uniform components.

Some embodiments of the present invention also provide a method for preparing a glass cleaning agent, comprising the steps of:

Specifically, water in the raw material of the glass cleaner is heated, and then the rest components in the glass cleaner are added into the water to obtain the glass cleaner.

Other embodiments of the invention also provide application of the glass cleaning agent disclosed by the invention to cleaning polishing powder on the surface of polished glass.

In other words, the invention also provides a glass cleaning method, which comprises the following steps: the glass cleaning agent disclosed by the invention is used for cleaning glass. Specifically, the polished glass is immersed into a solution added with the glass cleaning agent of the invention, and is cleaned by matching ultrasonic waves and heating, wherein the frequency of the ultrasonic waves is preferably 28KHz, the cleaning temperature is preferably 40-60 ℃, and the cleaning time is preferably 5 min. After cleaning, rinsing the glass, and then carrying out visual inspection under a desk lamp to observe whether polishing powder residue exists on the surface of the glass, whether blue spots or bluing phenomena exist and whether black spots are generated.

The present invention will be further described with reference to specific examples and comparative examples, which should not be construed as limiting the scope of the present invention.

Example 1:

the glass cleaning agent comprises the following components in percentage by weight: 3% of citric acid, 5% of sodium citrate, 0.5% of sodium dodecyl benzene sulfonate, 0.5% of cationic polyacrylamide, 0.5% of nonylphenol polyoxyethylene ether, 0.5% of sodium gluconate, 0.5% of sodium nitrate, 1.5% of hydrogen peroxide, 1% of ethylene glycol and the balance of water.

The preparation method of the glass cleaning agent comprises the following steps: heating water to 50 ℃, adding the rest components into the water according to the proportion, and uniformly mixing to obtain the glass cleaning agent.

100 polished glass sheets were taken and the glass cleaning agent of this example was used to clean the glass surface polishing powder. And starting ultrasonic waves in the cleaning process, wherein the ultrasonic frequency is 28KHz, the cleaning temperature is 45 ℃, and the ultrasonic cleaning time is 5 min.

And rinsing the cleaned glass, visually inspecting under a table lamp, and inspecting whether the surface of the glass has polishing powder residues, whether the surface of the glass is bluish and whether black spots are generated. The test results are shown in table 1.

Example 2:

the main components of the glass cleaning agent were substantially the same as in example 1. It differs from example 1 only in that: the amount of citric acid used varies. In the glass cleaning agent of the present example, the weight percentage of citric acid was 8%. The glass cleaning agent was prepared in the same manner as in example 1.

The cleaning effect of the glass cleaning agent was examined in the same manner as in example 1, and the examination results are shown in table 1.

Example 3:

the main components of the glass cleaning agent were substantially the same as in example 1. It differs from example 1 only in that: the amounts of citric acid and sodium citrate were varied. In the glass cleaning agent of the present example, the weight percentage of citric acid was 8%, and the weight percentage of sodium citrate was 3%. The glass cleaning agent was prepared in the same manner as in example 1.

Example 4:

the main components of the glass cleaning agent were substantially the same as in example 1. It differs from example 1 only in that: the dosage of the citric acid is different, the dosage of the sodium dodecyl benzene sulfonate is different, and the thickening agent sodium chloride and the fatty alcohol-polyoxyethylene ether are also added. In the glass cleaning agent of the embodiment, the weight percentage of citric acid is 8%, the weight percentage of thickener sodium chloride is 1%, the weight percentage of sodium dodecyl benzene sulfonate is 0.25%, and the weight percentage of fatty alcohol-polyoxyethylene ether is 0.25%. The glass cleaning agent was prepared in the same manner as in example 1.

Example 5:

the glass cleaning agent of the embodiment of the invention has the main components which are basically the same as those of the embodiment 1. It differs from example 1 only in that: the amounts of citric acid and sodium citrate were varied. In the glass cleaning agent of the present example, the weight percentage of citric acid was 8%, and the weight percentage of sodium citrate was 7%. The glass cleaning agent was prepared in the same manner as in example 1.

Example 6:

the glass cleaning agent of the embodiment of the invention has the main components which are basically the same as those of the embodiment 1. It differs from example 1 only in that: the amount of citric acid is different, and thickener sodium chloride is also added. In the glass cleaning agent of the present example, the weight percentage of citric acid is 8%, and the weight percentage of the thickener sodium chloride is 1%. The glass cleaning agent was prepared in the same manner as in example 1.

Example 7:

the main components of the glass cleaning agent were substantially the same as in example 4. It differs from example 4 only in that: the amount of thickener used varies. In the glass cleaning agent of the present example, the thickener sodium chloride was 2% by weight. The glass cleaning agent was prepared in the same manner as in example 4.

The glass cleaning agent has a good cleaning effect on polishing powder on the surface of glass, and glass is not easy to turn blue or generate black spots.

Example 8:

the main components of the glass cleaning agent were substantially the same as in example 1. It differs from example 1 only in that: the amount of surfactant used varies. In the glass cleaning agent of the present example, the following surfactants were used: 1% of sodium dodecyl benzene sulfonate, 1% of cationic polyacrylamide and 1% of nonylphenol polyoxyethylene ether. The glass cleaning agent was prepared in the same manner as in example 1.

Example 9:

the main components of the glass cleaning agent were substantially the same as in example 4. It differs from example 4 only in that: the dosage of the hydrogen peroxide is different. In the glass cleaning agent of the embodiment, the amount of hydrogen peroxide is 0.5%. The glass cleaning agent was prepared in the same manner as in example 4.

Comparative example 1:

100 polished glasses were cleaned in a conventional acidic cleaner (model AK173 cleaner from Shenzhen Shenfeng corporation). And starting ultrasonic waves in the cleaning process, wherein the ultrasonic frequency is 28KHz, the cleaning temperature is 45 ℃, and the ultrasonic cleaning time is 5 min.

Comparative example 2:

100 polished glasses were cleaned in a conventional alkaline cleaner (model AK171 cleaner from Shenzhen Shenfeng corporation). And starting ultrasonic waves in the cleaning process, wherein the ultrasonic frequency is 28KHz, the cleaning temperature is 45 ℃, and the ultrasonic cleaning time is 5 min.

Comparative example 3:

the main components of the glass cleaning agent were substantially the same as in example 1. It differs from example 1 only in that: the amount of citric acid used varies. In the glass cleaner of this comparative example, the weight percentage of citric acid was 12%. The glass cleaning agent was prepared in the same manner as in example 1.

Comparative example 4:

the main components of the glass cleaning agent were substantially the same as in example 4. It differs from example 4 only in that: the surfactants are different. In the glass cleaner of the present comparative example, only 1.5% of sodium fatty alcohol polyoxyethylene ether sulfate was used as the surfactant. The glass cleaning agent was prepared in the same manner as in example 4.

The cleaning effect of the glass cleaning agent was examined in the same manner as in example 4, and the examination results are shown in Table 1.

Comparative example 5:

the main components of the glass cleaning agent were substantially the same as in example 4. It differs from example 4 only in that: sodium nitrate and hydrogen peroxide are not added. The glass cleaning agent was prepared in the same manner as in example 4.

Comparative example 6:

the main components of the glass cleaning agent were substantially the same as in example 4. It differs from example 4 only in that: the sodium nitrate and the hydrogen peroxide are different in dosage. In the glass cleaning agent of the comparative example, the dosage of the sodium nitrate is 5 percent, and the dosage of the hydrogen peroxide is 5 percent. The glass cleaning agent was prepared in the same manner as in example 4.

TABLE 1 data of inspection results after glass cleaning in each example and comparative example

Detecting items	Residual proportion of polishing powder	Bluing proportion	Ratio of black dots
				Example 1	53％	0	0
Example 2	5％	0	0
				Example 3	3％	0	14％
Example 4	1％	0	0
				Example 5	15％	0	0
Example 6	3％	0	0
				Comparative example 1	3％	0	75％
Comparative example 2	69％	39％	0
				Comparative example 3	3％	0	62％
Comparative example 4	8％	0	0
				Comparative example 5	6％	0	0
Comparative example 6	13％	0	0

As can be seen from Table 1, the glass cleaning agent in the embodiments 1 to 6 of the present invention has a good cleaning effect on the polishing powder on the glass surface, and has a small effect on the performance of the glass surface after cleaning, and the ratio of occurrence of bluing or black spots on the glass is small.

In particular, in example 2 of the present invention, when citric acid was used in an amount of 8% and sodium citrate was used in an amount of 5%, no bluing or blacking occurred on the glass surface, and the residual ratio of the polishing powder was only 5%. The glass cleaning agent has better cleaning effect under the condition of the optimal mixture ratio of citric acid and sodium citrate.

Further, in inventive example 6, citric acid was used in an amount of 8%, sodium citrate was used in an amount of 5%, and sodium chloride was added as a thickener in an amount of 1%. After the glass is cleaned by using the glass cleaning agent, the surface of the glass does not turn blue or black spots, and the residual proportion of the polishing powder is only 3 percent. It is demonstrated that in the preferred embodiment, the cleaning effect of the glass surface polishing powder is further improved by adding a proper amount of the thickening agent to the cleaning agent.

Further, in example 4 of the present invention, the amount of citric acid was 8%, the amount of sodium citrate was 5%, sodium chloride was added in an amount of 1% as a thickener, and the amount of sodium dodecylbenzenesulfonate and the amount of fatty alcohol-polyoxyethylene ether in the surfactant were adjusted to 0.25% and 0.25%, respectively. After the glass is cleaned by using the glass cleaning agent, the surface of the glass does not turn blue or black spots, and the residual proportion of the polishing powder is only 1%. In the preferred embodiment, the types and the amounts of the composite surfactant in the cleaning agent are adjusted, so that the cleaning effect of the glass surface polishing powder is further improved.

From the examination data of comparative example 3, it is understood that when the amount of citric acid in the cleaning agent was adjusted to 12%, the cleaning effect on the polishing powder was good and the glass surface did not turn blue, but the ratio of black spots on the glass surface was as high as 62%. This is because the use of citric acid in an excessive amount leads to an excessively high acidity of the cleaning agent, which causes black spots on the surface of the glass after cleaning.

Comparing the inspection data of each example of the invention with those of comparative example 1 and comparative example 2, it can be seen that the glass cleaning agent of the invention has a significantly reduced proportion of black spots on the glass surface after cleaning compared with the conventional acid cleaning agent (comparative example 1); compared with the conventional alkaline cleaning agent (comparative example 2), the glass cleaning agent disclosed by the invention has the advantages that the bluing proportion of the glass surface after cleaning is greatly reduced, the residual proportion of polishing powder is also obviously reduced, and the cleaning effect is better.

Comparing the inspection data of example 4 of the present invention with those of comparative examples 4, 5 and 6, it can be seen that the cleaning effect of the polishing powder is weakened when a single surfactant is used in the glass cleaning agent (comparative example 4) or nitrate and hydrogen peroxide are not used (comparative example 5); when the nitrate and the hydrogen peroxide are excessively used in the glass cleaning agent (comparative example 6), the cleaning effect of the polishing powder is also deteriorated.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The glass cleaning agent is characterized by comprising the following components in percentage by weight: 3 to 10 percent of citric acid, 3 to 8 percent of citrate, 0 to 2 percent of thickening agent, 0.05 to 1 percent of anionic surfactant, 0.05 to 1 percent of cationic surfactant, 0.05 to 1 percent of nonionic surfactant, 0.1 to 2 percent of chelating agent, 0.1 to 2 percent of nitrate, 0.1 to 2 percent of hydrogen peroxide, 0.1 to 2 percent of cosolvent and the balance of water.

2. The glass cleaner according to claim 1, comprising the following components: 3 to 8 percent of citric acid, 3 to 8 percent of citrate, 0.8 to 1.2 percent of thickening agent, 0.25 to 0.8 percent of anionic surfactant, 0.3 to 0.8 percent of cationic surfactant, 0.3 to 0.8 percent of nonionic surfactant, 0.5 to 1.2 percent of chelating agent, 0.5 to 1.2 percent of nitrate, 0.8 to 1.5 percent of hydrogen peroxide, 0.8 to 1.2 percent of cosolvent and the balance of water.

3. The glass cleaning agent according to claim 1, wherein the anionic surfactant is at least one selected from the group consisting of fatty acid metal salts, alkylbenzene sulfonates, alkylsulfonate salts, alkylsulfonates, alkyl sulfates, fluorine-containing fatty acid salts, polysiloxanes, fatty alcohol sulfates, fatty alcohol polyoxyethylene ether sulfates, α -olefin sulfonates, fatty alcohol polyoxyethylene ether phosphates, alkylolamides, alkylsulfoacetamides, alkylsulfosuccinate sulfonates, alkylolamines alkylbenzene sulfonates, naphthenates, alkylphenol sulfonates, and polyoxyethylene monolaurates.

4. The glass cleaner according to claim 1, wherein the nonionic surfactant is at least one selected from the group consisting of fatty alcohol polyoxyethylene ether, octylphenol polyoxyethylene ether, nonylphenol polyoxyethylene ether, fatty acid polyoxyethylene ester, fatty acid methyl ester ethoxylate, ethylene oxide adduct of polypropylene glycol, ethylene glycol, glycerol pentaerythritol, sorbitan, and sucrose.

5. The glass cleaner according to claim 1, wherein the cationic surfactant is a cationic polyacrylamide; and/or

The cosolvent is at least one of ethylene glycol, sodium benzoate, citric acid and soluble amide compounds.

6. The glass cleaner according to claim 1, wherein the thickener is an inorganic salt thickener; and/or

The chelating agent is at least one of ethidene diphosphoric acid, ethylenediamine sodium di-zerophenyl acetate and sodium gluconate.

7. The glass cleaner according to claim 1, wherein the citrate is at least one of sodium citrate and potassium citrate; and/or

The nitrate is at least one of sodium nitrate, potassium nitrate and ammonium nitrate.

8. The glass cleaning agent according to any one of claims 1 to 7, wherein the pH of the glass cleaning agent is 4 to 9.

9. The preparation method of the glass cleaning agent is characterized by comprising the following steps:

the glass cleaner as defined in any one of claims 1 to 8, wherein the glass cleaner is obtained by providing each component and mixing the components uniformly.

10. Use of the glass cleaning agent as defined in any one of claims 1 to 8 for cleaning polishing powder for glass surface.