Deinking agent for one-time removal of glass ink and preparation method of deinking agent

Abstract

The invention discloses a deinking agent for one-time removal of glass ink and a preparation method thereof, and belongs to the technical field of deinking agents, the deinking agent comprises the following raw materials by mass: 30-60 parts of an organic compound, 4-10 parts of a surfactant, 2-6 parts of a penetrant, 1-3 parts of a corrosion inhibitor, 2-5 parts of a thickener and the balance of water, the viscosity of the deinking agent is increased, and the contact time of the deinking agent and glass is prolonged. The deinking agent solves the problems that when an existing deinking agent is used, the deinking performance is poor, ink cannot be removed at a time, and the using effect of the deinking agent is poor. According to the invention, the ink layer can be separated from the glass surface, the ink is separated from the glass surface, the removal of the glass ink is accelerated, the glass ink can be removed at one time, no residue is left on the glass surface, the deinking performance can be improved, and the use effect of the deinking agent is good.

Description

Technical Field

[0001] The invention relates to the technical field of deinking agents, in particular to a deinking agent for one-time removal of glass ink and a preparation method thereof. Background Art

[0002] Glass ink is a functional coating specially designed for printing on glass surfaces and can adhere firmly. It is mainly bonded to the glass substrate through high-temperature sintering or low-temperature curing. It is divided into high-temperature (720-850℃), tempered (680-720℃), and low-temperature (100-150℃) types according to the processing temperature. Among them, high-temperature and tempered inks are widely used in building curtain walls, automotive glass and other fields due to their excellent weather resistance.

[0003] Among them, the removal of glass ink is an important link in glass processing, and is widely used in the production process of touch screen panels, optical glass, tempered glass and other products. When removing glass ink, a deinking agent is often used to remove the glass ink. The removal process is: put the deinked workpiece into the deinking agent and soak it at room temperature for 1-5 minutes, then rinse with warm water and pure water before transferring to the next process.

[0004] However, the existing deinking agent has poor deinking performance when used and cannot remove ink in one go, resulting in poor use effect of the deinking agent. Summary of the Invention

[0005] The purpose of the present invention is to provide a deinking agent for one-time removal of glass ink and a preparation method thereof, which can remove glass ink in one go without leaving any residue on the glass surface, improve the deinking performance, and make the deinking agent have a good use effect, thereby solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A deinking agent for one-time removal of glass ink comprises the following raw materials in parts by weight: 30-60 parts of an organic compound, 4-10 parts of a surfactant, 2-6 parts of a penetrant, 1-3 parts of a corrosion inhibitor, 2-5 parts of a thickener, and the balance of water. The thickener is hydroxyethyl cellulose, which is used to increase the viscosity of the deinking agent and prolong the contact time between the deinking agent and the glass.

[0008] Preferably, the organic compound is a combination of citric acid and formic acid, and the mass ratio of the citric acid to formic acid is 2-6:1.

[0009] Preferably, the surfactant is one of fatty alcohol polyoxyethylene ether, sodium lauryl sulfate, and citric acid fatty acid glyceride.

[0010] Preferably, the penetrant is a fatty alcohol ethylene oxide condensate.

[0011] Preferably, the preparation method of the penetrating agent is: the fatty alcohol and the catalyst are dehydrated under vacuum at 100-120 DEG C and -0.095 MPa until the moisture content is less than or equal to 0.05%, and the oxygen content is less than 0.1% by replacing 3 times with nitrogen, the ethylene oxide is added in batches under the conditions of 130-160 DEG C and 0.3-0.5 MPa, and the penetrating agent is prepared after post-treatment.

[0012] Preferably, the post-treatment includes: adjusting the pH to 5.5-7.0 with acetic acid, adsorbing and filtering with an alkali catalyst, bleaching and decolorizing with 0.5-1% hydrogen peroxide at 50 DEG C, and removing by-products after distillation.

[0013] Preferably, the hydrophilic head and the hydrophobic tail of the surfactant spontaneously assemble in the solution, form spherical micelles at the critical micelle concentration, and the hydroxyethyl of the thickening agent and the polyoxyethylene chain of the surfactant are combined by hydrogen bonds to connect the discrete micelles and form a micellar network, which is used for enhancing the penetration and wrapping effect on the resin, and the shrinkage after film formation drives the ink layer to separate from the glass surface.

[0014] Preferably, the corrosion inhibitor is one of silicate, sodium silicate, sodium borate and sodium gluconate.

[0015] According to another aspect of the present application, a preparation method of a deinking agent for one-time removal of glass ink is provided, and the deinking agent for one-time removal of glass ink is prepared by the method, which comprises:

[0016] The organic compound and water are added into a reaction container, stirred for 5-10 min at a stirring speed of 50-80 r / min, mixed uniformly and cooled to room temperature;

[0017] The corrosion inhibitor and the penetrating agent are added into the reaction container, stirred for 6-10 min at a stirring speed of 60-80 r / min, mixed uniformly and cooled to room temperature;

[0018] The surfactant and the thickening agent are added into the reaction container, stirred for 10-20 min at a stirring speed of 60-100 r / min, mixed uniformly to obtain the deinking agent.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] The invention uses the hydrophilic head and the hydrophobic tail of the fatty alcohol polyoxyethylene ether to spontaneously assemble in a solution to form spherical micelles at a critical micelle concentration. The hydroxyethyl group of the hydroxyethyl cellulose and the polyoxyethylene chain of the fatty alcohol polyoxyethylene ether are bonded by hydrogen bonds to connect the discrete micelles to form a micelle network, which is used to enhance the penetration and wrapping effect of the resin. After film formation, the ink layer is driven to separate from the glass surface due to shrinkage. The fatty alcohol ethylene oxide condensate is used for infiltration to separate the ink from the glass surface, thereby accelerating the removal of the glass ink. The glass ink can be removed at one time without residue on the glass surface, thereby improving the deinking performance and achieving a good deinking agent use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a flow chart for preparing the deinking agent for one-time removal of glass ink. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In order to solve the problem that the existing deinking agent has poor deinking performance and cannot remove ink in one go, which leads to poor deinking effect, please refer to Figure 1 , this embodiment provides the following technical solutions:

[0024] Example 1

[0025] A deinking agent for one-time removal of glass ink comprises the following raw materials in parts by weight:

[0026] 30 parts of an organic compound, wherein the organic compound is a combination of citric acid and formic acid, and the mass ratio of citric acid to formic acid is 2-6:1;

[0027] 4 parts of surfactant, which is fatty alcohol polyoxyethylene ether, emulsifies ink particles and enhances wettability;

[0028] 2 parts of penetrant, which is a fatty alcohol ethylene oxide condensate, which is used to soak the ink away from the glass surface;

[0029] 1 part of corrosion inhibitor, which is silicate and protects the glass surface from alkaline corrosion;

[0030] Thickener 2 parts, thickener is hydroxyethyl cellulose, used to increase the viscosity of the deinking agent and prolong the contact time of the deinking agent with the glass, increase the viscosity of the deinking agent to 500-1000 cP, prevent liquid flow, prolong the contact time of the active ingredient with the ink, and suspend the peeled ink particles, avoid secondary deposition;

[0031] The balance is water.

[0032] In this embodiment, the preparation method of the penetrant is: the fatty alcohol and the catalyst are vacuum dehydrated at 100-120°C and -0.095MPa to a water content of ≤0.05%, and replaced by nitrogen for 3 cycles until the oxygen content is <0.1%;

[0033] The epoxy ethane is added in batches under the condition of 130-160°C and 0.3-0.5MPa, and the pH is adjusted to 5.5-7.0 with acetic acid;

[0034] Adsorption filtration is carried out with an alkali catalyst, bleaching and decolorization is carried out with 0.5-1% hydrogen peroxide at 50°C, and the byproduct is removed by distillation.

[0035] In this embodiment, the hydrophilic head and hydrophobic tail of the fatty alcohol polyoxyethylene ether spontaneously assemble in the solution, form spherical micelles at the critical micelle concentration, and the hydroxyethyl group of the hydroxyethyl cellulose and the polyoxyethylene chain of the fatty alcohol polyoxyethylene ether are combined by hydrogen bonds to connect the discrete micelles and form a micellar network, which is used to enhance the penetration and wrapping effect on the resin, and the shrinkage after film formation drives the ink layer to separate from the glass surface.

[0036] The technical specifications of the prepared deinking agent are as follows:

[0037] Appearance Golden yellow or brown transparent liquid Usage The liquid level is 2CM higher than the treated product Deinking efficiency ≥96％ odor Slight odor density 1.10±0.1

[0038] Among them, the change of micellar microenvironment polarity is detected by using pyrene probe to confirm that the order degree of micelles is improved after the addition of hydroxyethyl cellulose, and dynamic oscillation scanning shows that the storage modulus of the hydroxyethyl cellulose and fatty alcohol polyoxyethylene ether compound system is greater than the loss modulus, confirming the formation of an elastic network, and negative staining transmission electron microscopy can see the network structure of hydroxyethyl cellulose fibers connecting fatty alcohol polyoxyethylene ether micelles.

[0039] In order to better show the preparation process of the deinking agent for one-time removal of glass ink, the present embodiment provides a preparation method of a deinking agent for one-time removal of glass ink, for preparing the deinking agent for one-time removal of glass ink as described above, comprising:

[0040] The organic compound and water are added to the reaction container, stirred for 5-10min, the stirring speed is 50-80r / min, mixed uniformly and cooled to room temperature;

[0041] Add the corrosion inhibitor and penetrant into the reaction vessel, stir for 6-10 minutes at a stirring speed of 60-80 r / min, mix well and cool to room temperature;

[0042] Add the surfactant and the thickener into a reaction container, stir for 10-20 minutes at a stirring speed of 60-100 r / min, and mix evenly to obtain the deinking agent.

[0043] Example 2

[0044] A deinking agent for one-time removal of glass ink comprises the following raw materials in parts by weight:

[0045] 60 parts of organic compounds;

[0046] 10 parts of surfactant;

[0047] 6 parts of penetrant;

[0048] 3 parts of corrosion inhibitor;

[0049] 5 parts thickener;

[0050] The remaining amount of water.

[0051] Add the organic compound and water to the reaction container, stir for 5-10 minutes at a stirring speed of 50-80 r / min, mix evenly and cool to room temperature, add the corrosion inhibitor and the penetrant to the reaction container, stir for 6-10 minutes at a stirring speed of 60-80 r / min, mix evenly and cool to room temperature, add the surfactant and the thickener to the reaction container, stir for 10-20 minutes at a stirring speed of 60-100 r / min, and mix evenly to obtain the deinking agent.

[0052] Example 3

[0053] 50 parts of organic compounds;

[0054] 8 parts of surfactant;

[0055] 4 parts of penetrant;

[0056] 2 parts of corrosion inhibitor;

[0057] 4 parts thickener;

[0058] The remaining amount of water.

[0059] Add the organic compound and water to the reaction container, stir for 5-10 minutes at a stirring speed of 50-80 r / min, mix evenly and cool to room temperature, add the corrosion inhibitor and the penetrant to the reaction container, stir for 6-10 minutes at a stirring speed of 60-80 r / min, mix evenly and cool to room temperature, add the surfactant and the thickener to the reaction container, stir for 10-20 minutes at a stirring speed of 60-100 r / min, and mix evenly to obtain the deinking agent.

[0060] Comparative Example 1

[0061] 30 parts of organic compounds;

[0062] 4 parts of surfactant;

[0063] 2 parts of penetrant;

[0064] 1 part of corrosion inhibitor;

[0065] The remaining amount of water.

[0066] Add the organic compound and water to the reaction container, stir for 5-10 minutes at a stirring speed of 50-80 r / min, mix evenly and cool to room temperature, add the corrosion inhibitor and the penetrant to the reaction container, stir for 6-10 minutes at a stirring speed of 60-80 r / min, mix evenly and cool to room temperature, add the surfactant to the reaction container, stir for 10-20 minutes at a stirring speed of 60-100 r / min, and mix evenly to obtain the deinking agent.

[0067] Comparative Example 2

[0068] 30 parts of organic compounds;

[0069] 4 parts of surfactant;

[0070] 1 part of corrosion inhibitor;

[0071] The remaining amount of water.

[0072] Add the organic compound and water to a reaction container, stir for 5-10 minutes at a stirring speed of 50-80 r / min, mix evenly and cool to room temperature, add the corrosion inhibitor to the reaction container, stir for 6-10 minutes at a stirring speed of 60-80 r / min, mix evenly and cool to room temperature, add the surfactant to the reaction container, stir for 10-20 minutes at a stirring speed of 60-100 r / min, and mix evenly to obtain a deinking agent.

[0073] The deinking agents prepared in Examples 1-3 and Comparative Examples 1-2 were subjected to performance tests, wherein the deinking residual rate and glass corrosion tests were as follows:

[0074] 1) Deinking Residual Rate Test (GB / T 20216-2016)

[0075] The glass to be de-inked is placed in a de-inking agent, and the residual ink concentration (ERIC knot) on both sides is measured. The smaller the ERIC knot value, the better the ink stripping effect and the smaller the de-inking residual rate.

[0076] Among them, the deinking agent performance test results are shown in Table 1:

[0077] Table 1: Deinking agent performance test results

[0078] Deinking time (min) Deinking residual rate (%) Example 1 12 0 Example 2 8 0 Example 3 10 0 Comparative Example 1 14 8 Comparative Example 2 15 12

[0079] From the above table, it can be seen that in Examples 1-3, the deinking residual rate and glass corrosion conditions are the same. However, the deinking time in Example 2 is 8 minutes, which is the shortest. It can be seen that the deinking agent prepared in Example 2 has the best performance.

[0080] It can be seen from the above table that in Comparative Example 1, the deinking residual rate and glass corrosion conditions are lower than those in Example, indicating that adding a thickener can improve the deinking efficiency.

[0081] It can be seen from the above table that compared with Comparative Example 1, the deinking residual rate and glass corrosion of Comparative Example 2 are lower than those of Comparative Example 1, indicating that the addition of the penetrant can infiltrate the ink and remove it from the glass surface, thereby improving the deinking efficiency.

[0082] In summary, the organic compound and water are added to the reaction container, stirred for 5-10 minutes at a stirring speed of 50-80 r / min, mixed evenly and cooled to room temperature, the corrosion inhibitor and the penetrant are added to the reaction container, stirred for 6-10 minutes at a stirring speed of 60-80 r / min, mixed evenly and cooled to room temperature, the surfactant and the thickener are added to the reaction container, stirred for 10-20 minutes at a stirring speed of 60-100 r / min, and mixed evenly to obtain a deinking agent, which can remove the glass ink at one time without residue on the glass surface, improve the deinking performance, and make the deinking agent have a good use effect.

[0083] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0084] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A deinking agent for one-time removal of glass ink, characterized in that: The invention comprises the following raw materials in parts by weight: 30-60 parts of organic compound, 4-10 parts of surfactant, 2-6 parts of penetrant, 1-3 parts of corrosion inhibitor, 2-5 parts of thickener and the balance of water, wherein the thickener is hydroxyethyl cellulose, which is used to increase the viscosity of the deinking agent and prolong the contact time between the deinking agent and the glass.

2. The deinking agent for one-time removal of glass ink according to claim 1, characterized in that: The organic compound is a combination of citric acid and formic acid, and the mass ratio of the citric acid to the formic acid is 2-6:

1.

3. The deinking agent for one-time removal of glass ink according to claim 2, characterized in that: The surfactant is one of fatty alcohol polyoxyethylene ether, sodium lauryl sulfate, and citric acid fatty acid glyceride.

4. The deinking agent for one-time removal of glass ink according to claim 3, characterized in that: The penetrant is a fatty alcohol ethylene oxide condensate.

5. The deinking agent for one-time removal of glass ink according to claim 4, characterized in that: The preparation method of the penetrant is as follows: a fatty alcohol and a catalyst are vacuum dehydrated at 100-120°C and -0.095MPa to a moisture content of ≤0.05%, and nitrogen replacement is repeated three times to a cycle to an oxygen content of <0.1%, and ethylene oxide is added in batches at 130-160°C and 0.3-0.5MPa, followed by post-treatment to prepare the penetrant.

6. The deinking agent for one-time removal of glass ink according to claim 5, characterized in that: The post-treatment comprises: adjusting the pH to 5.5-7.0 with acetic acid, performing adsorption filtration with an alkali catalyst, bleaching and decolorizing with 0.5-1% hydrogen peroxide at 50° C., and removing by-products by distillation.

7. The deinking agent for one-time removal of glass ink according to claim 6, characterized in that: The hydrophilic head and hydrophobic tail of the surfactant spontaneously assemble in the solution to form spherical micelles at the critical micelle concentration. The hydroxyethyl group of the thickener and the polyoxyethylene chain of the surfactant are combined through hydrogen bonds to connect the discrete micelles to form a micellar network, which is used to enhance the penetration and wrapping effect of the resin. After the film is formed, the shrinkage drives the ink layer to separate from the glass surface.

8. The deinking agent for one-time removal of glass ink according to claim 7, characterized in that: The corrosion inhibitor is one of silicate, sodium silicate, sodium borate and sodium gluconate.

9. A method for preparing a deinking agent for one-time removal of glass ink, the method being used for preparing the deinking agent for one-time removal of glass ink according to any one of claims 1 to 8, characterized in that: include: Add the organic compound and water into the reaction vessel, stir for 5-10 minutes at a stirring speed of 50-80 rpm, mix well and cool to room temperature; Add the corrosion inhibitor and penetrant into the reaction vessel, stir for 6-10 minutes at a stirring speed of 60-80 r / min, mix well and cool to room temperature; Add the surfactant and the thickener into a reaction container, stir for 10-20 minutes at a stirring speed of 60-100 r / min, and mix evenly to obtain the deinking agent.

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