CN112812900B

CN112812900B - Foamless acidic cleaning agent and preparation method and application thereof

Info

Publication number: CN112812900B
Application number: CN202011607857.1A
Authority: CN
Inventors: 王世军; 彭晓林; 陈建章; 丁雄风
Original assignee: Wanjin Industrial Chibi Co Ltd
Current assignee: Wanjin Industrial Chibi Co Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2022-05-27
Anticipated expiration: 2040-12-29
Also published as: CN112812900A

Abstract

The invention relates to a foamless acidic cleaning agent and a preparation method and application thereof. The foamless acidic cleaning agent comprises the following raw materials in percentage by mass: 5 to 20 percent of organic acid, 3 to 10 percent of inorganic acid, 5 to 20 percent of active ingredient, 1 to 5 percent of pH buffering agent, 1 to 5 percent of dispersant, 5 to 20 percent of chelating agent and the balance of water; the active ingredient is selected from at least one of perborate and silica. The foamless acid cleaning agent can be used for rapidly removing polishing powder on the surface of glass without adding a surfactant through the coordination of the components in specific proportions, and the foamless acid cleaning agent does not damage the glass and can not foam in the cleaning process.

Description

Foamless acidic cleaning agent and preparation method and application thereof

Technical Field

The invention relates to the field of glass cleaning, in particular to a foamless acidic 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, it is necessary to subject the surface of the glass to a polishing treatment. 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.

Therefore, the cleaning agent capable of rapidly and effectively cleaning the polishing powder is of great significance.

Disclosure of Invention

Based on the above, the invention provides the foamless acid cleaning agent which can improve the cleaning efficiency of the polishing powder and has small damage to glass, and the preparation method and the application thereof.

The technical scheme of the invention is as follows.

The invention provides a foamless acid cleaning agent, which comprises the following raw materials in percentage by mass: 5 to 20 percent of organic acid, 3 to 10 percent of inorganic acid, 5 to 20 percent of active ingredient, 1 to 5 percent of pH buffering agent, 1 to 5 percent of dispersant, 5 to 20 percent of chelating agent and the balance of water;

wherein the active ingredient is selected from at least one of perborate and silica.

In some embodiments, the active ingredient is present in an amount of 5% to 10% by weight.

In some embodiments, the non-foaming acidic cleaning agent comprises the following raw materials in percentage by mass: 10 to 15 percent of organic acid, 3 to 5 percent of inorganic acid, 5 to 10 percent of active ingredient, 3 to 5 percent of pH buffering agent, 1 to 3 percent of dispersant, 5 to 15 percent of chelating agent and the balance of water.

In some of these embodiments, the active ingredient is selected from at least one of sodium perborate and silica.

In some embodiments, the organic acid is one or more selected from citric acid, oxalic acid, hydroxyethylidene diphosphonic acid and 2, 4-dimethyl benzene sulfonic acid, and/or the inorganic acid is one or more selected from sulfuric acid, phosphoric acid, nitric acid and boric acid.

In some of these embodiments, the pH buffering agent is selected from one or more of sodium citrate, sodium gluconate, and glycine; and/or the chelating agent is selected from one or more of sodium citrate, ethylene diamine tetraacetic acid, sodium gluconate and nitrilotriacetic acid.

In some of these embodiments, the dispersant is selected from one or more of sodium pyrophosphate, sodium silicate, and a polymeric sodium salt.

In some of these embodiments, the organic acid is selected from hydroxyethylidene diphosphonic acid, the inorganic acid is selected from sulfuric acid, the pH buffer is selected from glycine, and the active is selected from silica.

Another aspect of the present invention provides a method for preparing the above foamless acidic cleaning agent, comprising the steps of:

and mixing the water, the organic acid, the inorganic acid, the active ingredient, the pH buffering agent, the chelating agent and the dispersing agent according to the raw material ratio of the foamless acidic cleaning agent to obtain the foamless acidic cleaning agent.

The invention also provides application of the foamless acid cleaning agent in cleaning glass.

Advantageous effects

In the foamless acidic cleaning agent, organic acid, inorganic acid and pH buffering agent with specific proportions are adopted for matching to provide a specific acidic cleaning environment, and polishing powder is easy to wet in the acidic environment; meanwhile, by adding active ingredients in a specific ratio, wherein the active ingredients are selected from at least one of perborate and silicon dioxide, in the cleaning process of glass, under the flowing action of an aqueous solution or under ultrasonic vibration, the active ingredients or substances generated by reaction can peel off residual polishing powder on the surface of the glass, and by matching the dispersing action of a chelating agent and a dispersing agent in the specific ratio, the components in the specific ratio are coordinated, so that the polishing powder on the surface of the glass can be rapidly treated without damaging the glass without adding a surfactant, and the glass is not foamed in the cleaning process.

Detailed Description

In order that the invention may be more fully understood, a more particular description of the invention will now be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

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. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the traditional technology, an alkaline cleaning agent mainly comprising strong alkali or an acidic cleaning agent mainly comprising acid is generally adopted; both of them use acid or alkali to provide the pH value system needed by the cleaning agent, and the purpose of cleaning the polishing powder is achieved through the matching of other auxiliary agents. However, in the long-term research process, the skilled person finds that the traditional alkaline cleaning agent can cause glass to be corroded due to too strong alkalinity, so that the undesirable phenomena of scratching, bluing and the like occur; in the traditional acidic cleaning agent, the polishing powder on the surface of the glass is cleaned by adding assistants such as a surfactant, a dispersing agent and the like into an acidic system, but the problem of low removal efficiency of the polishing powder exists; in addition, the acid cleaning agent or the alkaline cleaning agent in the traditional technology is added with a surfactant component to increase the wetting effect on the polishing powder, and certain foam exists under the condition that no defoaming agent is added. In the cleaning process, the foam mostly reduces the effect of the product and affects the cleanliness; meanwhile, too much foam affects the visibility of the surface of the cleaned object and is not favorable for observing the cleaning degree. In the industrial cleaning, excessive foam overflows a cleaning system, so that environmental pollution is caused, and cleaning equipment is damaged.

In the traditional technology, the negative influence brought by the surfactant in the cleaning agent is usually eliminated by adding the defoaming agent, and the cleaning cost is greatly increased by additionally adding the defoaming agent.

On the other hand, some nonionic surfactants have cloud points, such as those found in the surfactant polyethylene glycols commonly used in conventional cleaning agents. I.e. an aqueous solution of the surfactant is heated, at a temperature at which the solution changes from transparent to turbid, i.e. the cloud point. Therefore, the cleaning solution added with the surfactant also has a cloud point, and at the cloud point temperature, the cleaning solution is mixed, the surfactant is precipitated, and the cleaning solution is layered even after cooling, so that the cleaning efficiency of the cleaning solution is reduced. When the surfactant is added into the cleaning agent, the existence of the surfactant can limit the use temperature of the cleaning agent, so that the debugging range of the cleaning process is greatly reduced.

Aiming at the problems in the prior art, the technical personnel of the invention break through the technical limitation of wetting polishing powder by adopting a surfactant to promote the removal of the polishing powder from the surface of glass in the prior art based on the working managers and research and development experiences of the technical personnel in the field of cleaning agents for many years, prepare the foamless acid cleaning agent by adopting specific active ingredients, and further obtain the technical scheme of the invention through a large number of experiments.

One embodiment of the invention provides a foamless acidic cleaning agent, which comprises the following raw materials in percentage by mass: 5 to 20 percent of organic acid, 3 to 10 percent of inorganic acid, 5 to 20 percent of active ingredient, 1 to 5 percent of pH buffering agent, 1 to 5 percent of dispersant, 5 to 20 percent of chelating agent and the balance of water; wherein the active ingredient is selected from at least one of perborate and silica.

In the foamless acidic cleaning agent, organic acid, inorganic acid and pH buffering agent with specific proportion are adopted for matching to provide a specific acidic cleaning environment, and polishing powder is easy to be wetted in the acidic environment; meanwhile, by adding active ingredients in a specific ratio, wherein the active ingredients are selected from at least one of perborate and silicon dioxide, in the cleaning process of glass, under the flowing action of an aqueous solution or under ultrasonic vibration, the active ingredients or substances generated by the reaction of the active ingredients can peel off residual polishing powder on the surface of the glass, and by matching the dispersing action of a chelating agent and a dispersing agent in the specific ratio, the components in the specific ratio are coordinated, so that the polishing powder on the surface of the glass can be rapidly treated without damaging the glass without adding a surfactant, and the glass is not foamed in the cleaning process.

In some embodiments, the organic acid is present in an amount of 10 to 15% by weight.

Too high a ratio of the organic acid adversely affects the performance of the dispersant and other auxiliaries, while too low a ratio thereof is consumed rapidly during cleaning, thereby reducing the cleaning efficiency of the polishing powder.

The organic acid includes carboxyl (-COOH), sulfonic acid (-SO)₃H) Sulfinic acid, and organophosphonic acid, and the like, including but not limited to: acetic acid, propionic acid, butyric acid, succinic acid, benzoic acid, oxalic acid, tartaric acid, citric acid, hydroxyethylidene diphosphonic acid and 2, 4-dimethylbenzenesulfonic acid.

In some embodiments, the organic acid is selected from one or more of citric acid, oxalic acid, hydroxyethylidene diphosphonic acid and 2, 4-dimethyl benzene sulfonic acid.

Preferably, the organic acid is at least one selected from the group consisting of citric acid and hydroxyethylidene diphosphonic acid.

In some embodiments, the inorganic acid is 3 to 5% by weight.

The inorganic acid is used for supplementing the hydrogen ion concentration in the foamless acidic cleaning agent system, so that the acidic cleaning can maintain a specific acidic environment to promote the wetting degree of the polishing powder in the cleaning agent.

In some embodiments, the inorganic acid is selected from one or more of sulfuric acid, phosphoric acid, nitric acid, and boric acid.

Preferably, the inorganic acid is at least one selected from the group consisting of sulfuric acid and phosphoric acid.

In some embodiments, the pH buffer is 3% to 5% by weight.

The pH buffering agent can supplement and adjust the hydrogen ion concentration in the foamless acidic cleaning agent system, so that the cleaning agent can maintain a specific acidic environment in the using process and is used for cleaning polishing powder on glass.

In some embodiments, the pH buffer is selected from one or more of sodium citrate, sodium gluconate, and glycine. Further, the pH buffering agent is selected from glycine.

In some embodiments, the active ingredient is 5 to 10% by weight.

In the foamless acidic cleaning agent, the organic acid, the inorganic acid and the pH buffering agent in a specific ratio are matched to provide a specific acidic cleaning environment, and the polishing powder is easily wetted in the acidic environment; meanwhile, by adding active ingredients with a specific ratio, in the cleaning process of the glass, under the flowing action of an aqueous solution or under ultrasonic vibration, the active ingredients or substances generated by the reaction of the active ingredients can peel off the residual polishing powder on the surface of the glass, the polishing powder on the surface of the glass can be rapidly treated without adding a surfactant, and the glass is not damaged; if the ratio of the active ingredients is too low, the cleaning efficiency of the polishing powder will be reduced. When the active component accounts for 5-10% by mass, the cleaning efficiency of the polishing powder can be further improved, and the glass is not damaged.

In some of these embodiments, the active ingredient is selected from at least one of perborate metal salt and silica.

In some of these embodiments, the active ingredient is selected from alkali metal salts of perboric acid; further, the metal in the alkali metal salt of perboric acid is selected from sodium or potassium.

Specifically, the active ingredient is at least one selected from sodium perborate and silica.

In some embodiments, the chelating agent is 5 to 15% by mass.

In some embodiments, the chelating agent is selected from one or more of sodium citrate, ethylenediaminetetraacetic acid (EDTA), sodium gluconate, and nitrilotriacetic acid.

Preferably, the chelating agent is one or more selected from Ethylene Diamine Tetraacetic Acid (EDTA), sodium gluconate, and nitrilotriacetic acid.

In some embodiments, the dispersant is 1 to 3% by mass.

In some embodiments, the dispersant is selected from one or more of sodium pyrophosphate, sodium silicate and polymer sodium salt.

Preferably, the above-mentioned dispersing agent is selected from the sodium salts of polymers. Specifically, polymeric sodium salt dispersants include homopolymer sodium salts, such as acrylic acid homopolymer sodium salts, for example, the commercially available model akkersu 445N, also known as Acusol 445N dow; also included are the sodium salts of the copolymers, such as the commercially available sokalan PA25CL-FR, model BASF, abbreviated BASF P25.

The chelating agent and the dispersing agent have a dispersing effect, and can further promote the dispersion of the polishing powder in the foamless acidic cleaning agent, so that the polishing powder on the surface of the glass can be very quickly treated, and the glass is not damaged.

Preferably, the foamless acidic cleaning agent comprises the following raw materials in percentage by mass: 10 to 15 percent of organic acid, 3 to 5 percent of inorganic acid, 5 to 10 percent of active ingredient, 3 to 5 percent of pH buffering agent, 1 to 3 percent of dispersant, 5 to 15 percent of chelating agent and the balance of water.

Further preferably, the organic acid is selected from citric acid, the inorganic acid is selected from sulfuric acid, the pH buffer is selected from sodium citrate, and the active substance is selected from silica.

Further, the preparation method of the foamless acidic cleaning agent comprises the following steps S10-S20.

And step S10, mixing water, organic acid, inorganic acid, active ingredients, a pH buffering agent, a chelating agent and a dispersing agent according to the raw material proportion of the foamless acidic cleaning agent to obtain the foamless acidic cleaning agent.

Specifically, in step S10, the organic acid, the inorganic acid, the active ingredient, the pH buffer, the chelating agent, and the dispersant are sequentially added to water, stirred, mixed, and diluted by 10 to 15 times for use.

The invention also provides an application of the foamless acid cleaning agent in cleaning glass.

In some embodiments, the glass is polished glass, and rare earth polishing powder remains on the surface of the glass.

The rare earth polishing powder is a rare earth-based polishing powder, including but not limited to oxides of lanthanum, cerium, praseodymium or neodymium, such as cerium oxide CeO₂La, lanthanum oxide₂O₃(ii) a The commonly used rare earth polishing powder is cerium-based polishing powder, and specifically, the polishing powder is cerium oxide.

In the foamless acidic cleaning agent, organic acid, inorganic acid and pH buffering agent with specific proportion are adopted for matching to provide a specific acidic cleaning environment, and polishing powder is easy to be wetted in the acidic environment; meanwhile, by adding active ingredients with a specific ratio, in the cleaning process of the glass, under the flowing action of an aqueous solution or under ultrasonic vibration, the active ingredients or substances generated by the reaction of the active ingredients can peel off the residual polishing powder on the surface of the glass, the polishing powder on the surface of the glass can be rapidly treated without adding a surfactant, and the glass is not damaged; if the ratio of the active ingredients is too low, the cleaning efficiency of the polishing powder will be reduced. When the active component accounts for 5-10% by mass, the cleaning efficiency of the polishing powder can be further improved.

While the present invention will be described with respect to particular embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover by the appended claims the scope of the invention, and that certain changes in the embodiments of the invention will be suggested to those skilled in the art and are intended to be covered by the appended claims.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

Example 1

The method comprises the following specific steps:

1) providing polished glass, wherein the polishing powder is as follows: and (3) cerium oxide.

2) Providing a foamless acidic cleaning agent comprising the following components in percentage by mass:

3) diluting the foamless acid cleaning agent provided by the step 2) by 10 times with water, then placing the polished glass into the diluted foamless acid cleaning agent, ultrasonically cleaning for 130s, observing whether foam is generated in the cleaning process, rinsing after cleaning, and drying to obtain the cleaned glass.

4) Detecting whether polishing powder remains on the cleaned glass obtained in the step 2) or not and whether scratches exist on the glass.

5) Taking polished glass of the same batch, repeating the steps 2) to 3), cleaning and detecting 500 polished glass blocks in total, recording the number of the polished glass blocks with polishing powder or scratches left after cleaning, and specifically detecting the result as shown in table 1.

Example 2

The method comprises the following specific steps:

3) diluting the foamless acid cleaning agent provided in the step 2) by 10 times with water, then placing the polished glass into the diluted foamless acid cleaning agent, ultrasonically cleaning for 130s, observing whether foam is generated in the cleaning process, rinsing after cleaning, and drying to obtain the cleaned glass.

Example 3

The method comprises the following specific steps:

Example 4

The method comprises the following specific steps:

Example 5

The method comprises the following specific steps:

Example 6

Example 7 is essentially the same as example 2 except that example 7, step 2) provides a foamless acidic cleaner comprising the following components in mass percent:

example 7

The method comprises the following specific steps:

3) diluting the foamless acid cleaning agent provided in the step 2) by 10 times with water, then placing the polished glass into the diluted foamless acid cleaning agent, ultrasonically cleaning for 130s, rinsing after cleaning, and drying to obtain the cleaned glass.

Comparative example 1

The method comprises the following specific steps:

2) The application numbers are provided as: 201811275473.7 acidic cleaning agent of example 1 entitled "cleaning agent for glass cleaning and method for its preparation and use", namely: 8 wt% of phosphoric acid, 10005 wt wt% of Dow Acumer, 2 wt% of alkyl diphenyl ether disulfonic acid sodium, 5 wt% of glycerol and the balance of water.

3) Diluting the acid cleaning agent provided in the step 2) by 10 times with water, then placing the polished glass in the diluted acid cleaning agent, performing ultrasonic cleaning for 130s, observing whether foam is generated in the cleaning process, rinsing and drying after cleaning is finished, and obtaining the cleaned glass.

Comparative example 2

The method comprises the following specific steps:

2) The application numbers are provided as: 201510145756.X, a cleaning agent in the patent art entitled "an optical glass cleaning agent and a process for its preparation", namely: 6 wt% of sodium hydroxide, 25 w% of potassium hydroxide, 4.45w% of EDTA-4NA0, 5.2 w% of emulsifier (FMES), 5.8 w% of dispersant (peregal-10), 0.2 w% of smoothing agent (polyethylene glycol and sodium dodecyl benzene sulfonate in a mass ratio of 3: 1), and the balance of water.

3) Diluting the acid cleaning agent provided in the step 2) by 10 times with water, then placing the polished glass in the diluted acid cleaning agent, ultrasonically cleaning for 130s, observing whether foam is generated in the cleaning process, rinsing after cleaning, and drying to obtain the cleaned glass.

3) Detecting whether polishing powder remains on the cleaned glass obtained in the step 2) or not and whether scratches exist on the glass.

4) Taking polished glass of the same batch, repeating the steps 2) to 3), cleaning and detecting 500 polished glass blocks in total, recording the number of the polished glass blocks with polishing powder or scratches left after cleaning, and specifically detecting the result as shown in table 1.

Comparative example 3

The method comprises the following specific steps:

Comparative example 4

The method comprises the following specific steps:

Comparative example 5

The method comprises the following specific steps:

Comparative example 6

Comparative example 6 is substantially the same as example 2 except that step 2) of comparative example 6 provides an acidic cleaner comprising the following components in mass percent:

the other steps and conditions were the same as in example 2.

Comparative example 7

Comparative example 7 is substantially the same as example 2 except that step 2) of comparative example 7 provides an acidic cleaner comprising the following components in mass percent:

the other steps and conditions were the same as in example 2.

Comparative example 8

Comparative example 8 is substantially the same as example 2 except that: step 2) of comparative example 8 provides an acidic cleaner comprising the following components in mass percent:

the other steps and conditions were the same as in example 2.

Comparative example 9

Comparative example 9 is substantially the same as example 2 except that: step 2) of comparative example 9 provides an acidic cleaning agent comprising the following components in mass percent:

the other steps and conditions were the same as in example 2.

Cleaning agent performance test

The specific detection steps for detecting the residues and scratches of the polishing powder on the cleaned glass in the examples 1 to 7 and the comparative examples 1 to 9 are as follows: in a closed space, a table lamp is used as an inspection tool to observe the cleaned glass sheet, and scratches and dirt can be seen by naked eyes to be bad. The results are shown in Table 1.

TABLE 1

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 should be subject to the appended claims.

Claims

1. The foamless acid cleaning agent for cleaning polishing powder on glass is characterized by comprising the following raw materials in percentage by mass: 5% -20% of organic acid, 3% -10% of inorganic acid, 5% -10% of active ingredients, 1% -5% of pH buffering agent, 1% -5% of dispersing agent, 5% -20% of chelating agent and the balance of water;

wherein the active ingredient is selected from at least one of sodium perborate and silica;

the organic acid is one or more selected from citric acid, oxalic acid, hydroxyethylidene diphosphonic acid and 2, 4-dimethyl benzene sulfonic acid;

the inorganic acid is selected from one or more of sulfuric acid, phosphoric acid, nitric acid and boric acid;

the pH buffering agent is selected from one or more of sodium citrate, sodium gluconate and glycine;

the chelating agent is selected from one or more of sodium citrate, ethylene diamine tetraacetic acid, sodium gluconate and nitrilotriacetic acid;

the dispersing agent is selected from one or more of sodium pyrophosphate, sodium silicate and polymer sodium salt.

2. The foamless acidic cleaner as claimed in claim 1, wherein the foamless acidic cleaner comprises the following raw materials in mass percent: 10% -15% of organic acid, 3% -5% of inorganic acid, 5% -10% of active ingredients, 3% -5% of pH buffering agent, 1% -3% of dispersing agent, 5% -15% of chelating agent and the balance of water.

3. The foamless acidic cleaning agent according to any one of claims 1 to 2, wherein the organic acid is selected from hydroxyethylidene diphosphonic acid, the inorganic acid is selected from sulfuric acid, the pH buffering agent is selected from glycine, and the active substance is selected from silica.

4. A non-foaming acidic cleaning agent according to any one of claims 1 to 2 wherein said dispersing agent is selected from the group consisting of sodium salts of polymers selected from the group consisting of sodium salts of homopolymers and/or sodium salts of copolymers.

5. The method for producing a foamless acidic cleaning agent as claimed in any one of claims 1 to 4, which comprises the steps of:

and mixing the water, the organic acid, the inorganic acid, the active ingredient, the pH buffering agent, the chelating agent and the dispersing agent according to the raw material proportion of the foamless acidic cleaning agent to obtain the foamless acidic cleaning agent.

6. Use of the non-foaming acidic cleaning agent as defined in any one of claims 1 to 4 for cleaning glass.