Ink dissolving agent, preparation method and application thereof

Abstract

The present invention provides an ink dissolving agent, a preparation method thereof, and an application thereof. The ink dissolving agent of the present invention comprises components including isophorone diamine, N,N-dimethyl-9-decenamide, tetrahydrofurfuryl alcohol, and cyclopropyl oleate. The ink dissolving agent of the present invention can remove and dissolve the ink on the surface of the workpiece to be deinked, thereby preventing the ink residue from remaining on the workpiece surface. Subsequently, only direct rinsing is required to achieve a thorough cleaning effect, thereby saving labor costs. In the ink dissolving agent of the present invention, isophorone diamine and N,N-dimethyl-9-decenamide have a synergistic dissolving effect. When the two are combined in a certain ratio, the dissolution rate of the swollen ink can be significantly accelerated. The present invention also provides a preparation method and an application of the ink dissolving agent.

Description

Technical Field

[0001] The invention belongs to the technical field of inks, and in particular relates to an ink dissolving agent and a preparation method and application thereof. Background Art

[0002] Stainless steel, with its corrosion resistance, high strength, and strong plasticity, is widely used in various fields. In 3C electronic products, stainless steel is widely used as metal structural components. Stainless steel structural components are often sprayed with ink to create the corresponding components. During the spraying process on stainless steel surfaces, some defective products may be produced due to various reasons. To reduce material costs, these defective products need to be de-inked to achieve reuse.

[0003] In the prior art, deinking agents containing organic solvents are commonly used under heated conditions. While these deinking agents offer advantages such as high efficiency and speed, they cannot dissolve the removed ink residue. For complex workpieces with mesh structures, removed ink clumps tend to remain within the mesh, making it difficult to rinse the ink away. Consequently, the remaining ink clumps must be manually removed using a fine needle. This manual removal process is time-consuming and labor-intensive, and can also damage the workpiece.

[0004] Therefore, it is still necessary to develop an ink dissolving agent that can dissolve ink. Summary of the Invention

[0005] The present invention aims to address at least one of the aforementioned technical problems existing in the prior art. To this end, the present invention provides an ink dissolving agent. When used to deink workpieces having a mesh or complex structure, the removed ink clumps do not remain in the mesh but are directly dissolved in the ink dissolving agent. A simple rinse can yield a workpiece surface free of any ink residue, eliminating the need for manual cleaning with tools. This improves production efficiency and reduces costs.

[0006] The invention also provides a method for preparing the ink dissolving agent.

[0007] The invention also provides a deinking method.

[0008] The first aspect of the present invention provides an ink dissolving agent, the components of which include isophoronediamine, N,N-dimethyl-9-decenamide, tetrahydrofurfuryl alcohol and cyclopentyl oleate.

[0009] One of the technical solutions of the present invention regarding the ink dissolving agent has at least the following beneficial effects:

[0010] The ink dissolving agent of the present invention can remove and dissolve the ink on the surface of the workpiece to be deinked, thereby preventing the fallen ink residue from remaining on the workpiece surface. Subsequent direct rinsing is required to achieve a thorough cleaning effect, thus saving labor costs.

[0011] In the ink dissolving agent of the present invention, isophorone diamine and N, N-dimethyl-9-decenamide have a synergistic dissolving effect. When the two are combined in a certain ratio, the dissolving speed of the swollen ink can be significantly accelerated.

[0012] Tetrahydrofurfuryl alcohol is a versatile organic solvent with good chemical solubility and high permeability. It can swell the ink and help the ink swell and fall off from the stainless steel surface.

[0013] The long carbon chain and dicarboxyl structure in the cyclopentyl oleate molecule enable the pigment component in the ink composition to be dispersed in the ink solvent, thereby preventing it from adhering to the substrate surface of the workpiece to be deinked.

[0014] The ink dissolving agent of the present invention has readily available raw materials for each component, low cost, and is suitable for large-scale promotion and application.

[0015] According to some embodiments of the present invention, the components include, in parts by weight:

[0016] Isophorone diamine: 30 to 40 parts,

[0017] N,N-dimethyl-9-decenamide: 15 to 80 parts,

[0018] Tetrahydrofurfuryl alcohol: 30 to 40 parts,

[0019] Cyclopropyl oleate: 3 to 5 parts.

[0020] According to some embodiments of the present invention, the mass ratio of isophorone diamine to N,N-dimethyl-9-decenamide is in the range of 1:0.5-2. When isophorone diamine and N,N-dimethyl-9-decenamide are combined in this ratio, the ink dissolution rate can be significantly increased.

[0021] According to some embodiments of the present invention, the components include, in parts by weight:

[0022] Isophorone diamine: 30 to 35 parts,

[0023] N,N-dimethyl-9-decenamide: 15 to 70 parts,

[0024] Tetrahydrofurfuryl alcohol: 30 to 35 parts,

[0025] Cyclopropyl oleate: 3 to 5 parts.

[0026] According to some embodiments of the present invention, the components include, in parts by weight:

[0027] Isophorone diamine: 32 parts,

[0028] N,N-dimethyl-9-decenamide: 32 parts,

[0029] Tetrahydrofurfuryl alcohol: 32 parts,

[0030] Cyclohexyl oleate: 4 parts.

[0031] According to some embodiments of the present invention, the cyclopentyl oleate salt includes at least one of sodium cyclopentyl oleate, potassium cyclopentyl oleate and ammonium cyclopentyl oleate.

[0032] The second aspect of the present invention provides a method for preparing an ink dissolving agent, which comprises: adding the N,N-dimethyl-9-decenamide, tetrahydrofurfuryl alcohol and cyclopentyl oleate to the isophorone diamine according to a proportion and mixing them evenly.

[0033] A technical solution of the present invention in the method for preparing an ink dissolving agent has at least the following beneficial effects:

[0034] The preparation method of the present invention does not require expensive equipment and complicated process control, has undemanding reaction conditions, has readily available raw materials, has low production costs, and is easy to industrialize.

[0035] The third aspect of the present invention provides a deinking method, wherein a workpiece to be deinked is immersed in the ink-dissolving agent of the present invention.

[0036] A technical solution of the deinking method of the present invention has at least the following beneficial effects:

[0037] The deinking method of the present invention does not require expensive equipment and complicated process control, has undemanding deinking conditions, and has a simple deinking process, and is easy to promote industrially.

[0038] According to some embodiments of the present invention, the soaking temperature is 70°C to 90°C.

[0039] According to some embodiments of the present invention, the soaking temperature is about 80°C.

[0040] According to some embodiments of the present invention, the soaking time is 2 minutes to 10 minutes.

[0041] According to some embodiments of the present invention, the workpiece to be deinked comprises a stainless steel workpiece.

[0042] According to some embodiments of the present invention, the workpiece to be deinked includes a workpiece having a mesh structure.

[0043] When deinking workpieces with a mesh structure using conventional deinking agents, the removed ink clumps tend to remain in the mesh, making it impossible to rinse the ink away. Manual removal of the tiny ink clumps with tools is necessary, which is not only time-consuming and labor-intensive, but also prone to damage to the workpiece. The ink dissolving agent of the present invention can remove and dissolve the ink on the surface of the workpiece to be deinked, preventing any ink residue from remaining on the workpiece surface. Subsequent direct rinsing is sufficient to achieve a thorough cleaning effect, saving labor costs. DETAILED DESCRIPTION

[0044] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the embodiments, but the present invention is not limited to these embodiments.

[0045] In some embodiments of the present invention, the present invention provides an ink dissolving agent, the components of which include isophoronediamine, N,N-dimethyl-9-decenamide, tetrahydrofurfuryl alcohol and cyclopentyl oleate.

[0046] It can be understood that the ink dissolving agent of the present invention can remove and dissolve the ink on the surface of the workpiece to be deinked, avoiding the ink residue from remaining on the workpiece surface. Subsequent direct rinsing is sufficient to achieve a thorough cleaning effect, saving labor costs.

[0047] In the ink dissolving agent of the present invention, isophorone diamine and N, N-dimethyl-9-decenamide have a synergistic dissolving effect. When the two are combined in a certain ratio, the dissolving speed of the swollen ink can be significantly accelerated.

[0048] It should be noted that tetrahydrofurfuryl alcohol is a multi-purpose organic solvent with good chemical solubility and high permeability. It can swell the ink, assist the ink in swelling and falling off from the stainless steel surface.

[0049] The long carbon chain and dicarboxyl structure in the cyclopentyl oleate molecule enable the pigment component in the ink composition to be dispersed in the ink solvent, thereby preventing it from adhering to the substrate surface of the workpiece to be deinked.

[0050] It should also be noted that the present invention is an ink dissolving agent that can dissolve ink in a potion, which is different from conventional deinking agents. Conventional deinking agents can only remove ink from the workpiece but cannot dissolve it.

[0051] The ink dissolving agent of the present invention has readily available raw materials for each component, low cost, and is suitable for large-scale promotion and application.

[0052] The CAS number of isophoronediamine is 2855-13-2.

[0053] The CAS number of N,N-dimethyl-9-decenamide is 1356964-77-6.

[0054] The CAS number of tetrahydrofurfuryl alcohol is 97-99-4.

[0055] In some embodiments of the present invention, the components include, by weight:

[0056] Isophorone diamine: 30 to 40 parts,

[0057] N,N-dimethyl-9-decenamide: 15 to 80 parts,

[0058] Tetrahydrofurfuryl alcohol: 30 to 40 parts,

[0059] Cyclopropyl oleate: 3 to 5 parts.

[0060] In some embodiments of the present invention, the mass ratio of isophorone diamine to N,N-dimethyl-9-decenamide is in the range of 1:0.5-2. When isophorone diamine and N,N-dimethyl-9-decenamide are combined in this ratio, the ink dissolution rate can be significantly increased.

[0061] In some embodiments of the present invention, the components include, by weight:

[0062] Isophorone diamine: 30 to 35 parts,

[0063] N,N-dimethyl-9-decenamide: 15 to 70 parts,

[0064] Tetrahydrofurfuryl alcohol: 30 to 35 parts,

[0065] Cyclopropyl oleate: 3 to 5 parts.

[0066] In some embodiments of the present invention, the components include, by weight:

[0067] Isophorone diamine: 32 parts,

[0068] N,N-dimethyl-9-decenamide: 32 parts,

[0069] Tetrahydrofurfuryl alcohol: 32 parts,

[0070] Cyclohexyl oleate: 4 parts.

[0071] In some embodiments of the present invention, the cyclopentyl oleate salt includes at least one of sodium cyclopentyl oleate, potassium cyclopentyl oleate, and ammonium cyclopentyl oleate.

[0072] The CAS number of cyclohexyl oleic acid is 58980-88-4.

[0073] The CAS number of potassium cyclopentyl oleate is 68127-33-3.

[0074] In other embodiments of the present invention, a method for preparing an ink dissolving agent is provided, wherein N,N-dimethyl-9-decenamide, tetrahydrofurfuryl alcohol and cyclopentyl oleate are added to isophorone diamine according to a proportion and mixed.

[0075] It can be understood that the preparation method of the present invention does not require expensive equipment and complex process control, the reaction conditions are not harsh, the raw materials are easily available, the production cost is low, and it is easy to industrialize.

[0076] In some other embodiments of the present invention, an ink dissolving method is provided, wherein a workpiece to be ink-dissolved is immersed in the ink dissolving agent of the present invention.

[0077] It can be understood that the ink dissolving method of the present invention does not require expensive equipment and complex process control, the ink dissolving conditions are not harsh, the ink dissolving process is simple, and it is easy to promote industrialization.

[0078] In some embodiments of the present invention, the soaking temperature is 70°C to 90°C.

[0079] In some embodiments of the present invention, the soaking temperature is about 80°C.

[0080] In some embodiments of the present invention, the soaking time is 2 min to 10 min.

[0081] In some embodiments of the present invention, the workpiece to be soluble in ink comprises a stainless steel workpiece.

[0082] In some embodiments of the present invention, the workpiece to be dissolved in ink includes a workpiece having a mesh structure.

[0083] When deinking workpieces with a mesh structure using conventional deinking agents, the removed ink clumps tend to remain in the mesh, making it impossible to rinse the ink away. Manual removal of the tiny ink clumps with tools is necessary, which is not only time-consuming and labor-intensive, but also prone to damage to the workpiece. The ink dissolving agent of the present invention can remove and dissolve the ink on the surface of the workpiece to be deinked, preventing any ink residue from remaining on the workpiece surface. Subsequent direct rinsing is sufficient to achieve a thorough cleaning effect, saving labor costs.

[0084] The technical solution of the present invention will be better understood with reference to the following specific embodiments and comparative examples.

[0085] Example 1

[0086] Provided is an ink dissolving agent, which comprises, by weight:

[0087] Isophorone diamine: 32 parts,

[0088] N,N-dimethyl-9-decenamide: 32 parts,

[0089] Tetrahydrofurfuryl alcohol: 32 parts,

[0090] Sodium cyclohexyl oleate: 4 parts.

[0091] The preparation method is as follows: according to proportion, N,N-dimethyl-9-decenamide, tetrahydrofurfuryl alcohol and sodium cyclopropyl oleate are added to isophorone diamine under stirring conditions, and the mixture is evenly mixed.

[0092] Example 2

[0093] Provided is an ink dissolving agent, which comprises, by weight:

[0094] Isophorone diamine: 32 parts,

[0095] N,N-dimethyl-9-decenamide: 16 parts,

[0096] Tetrahydrofurfuryl alcohol: 32 parts,

[0097] Sodium cyclohexyl oleate: 4 parts.

[0098] The preparation method is as follows: according to proportion, N,N-dimethyl-9-decenamide, tetrahydrofurfuryl alcohol and sodium cyclopropyl oleate are added to isophorone diamine under stirring conditions, and the mixture is evenly mixed.

[0099] Example 3

[0100] Provided is an ink dissolving agent, which comprises, by weight:

[0101] Isophorone diamine: 32 parts,

[0102] N,N-dimethyl-9-decenamide: 64 parts,

[0103] Tetrahydrofurfuryl alcohol: 32 parts,

[0104] Sodium cyclohexyl oleate: 4 parts.

[0105] The preparation method is as follows: according to proportion, N,N-dimethyl-9-decenamide, tetrahydrofurfuryl alcohol and sodium cyclopropyl oleate are added to isophorone diamine under stirring conditions, and the mixture is evenly mixed.

[0106] Comparative Example 1

[0107] Provided is an ink dissolving agent, which comprises, by weight:

[0108] N,N-dimethyl-9-decenamide: 64 parts,

[0109] Tetrahydrofurfuryl alcohol: 32 parts,

[0110] Sodium cyclohexyl oleate: 4 parts.

[0111] The preparation method comprises the following steps: uniformly mixing N,N-dimethyl-9-decenamide, tetrahydrofurfuryl alcohol and sodium cyclopropyl oleate according to proportions under stirring conditions.

[0112] Comparative Example 2

[0113] Provided is an ink dissolving agent, which comprises, by weight:

[0114] Isophorone diamine: 64 parts,

[0115] Tetrahydrofurfuryl alcohol: 32 parts,

[0116] Sodium cyclohexyl oleate: 4 parts.

[0117] The preparation method comprises the following steps: adding tetrahydrofurfuryl alcohol and sodium cyclopropyl oleate to isophorone diamine in proportion and mixing them under stirring.

[0118] Comparative Example 3

[0119] Provided is an ink dissolving agent, which comprises, by weight:

[0120] Isophorone diamine: 32 parts,

[0121] N,N-dimethyl-9-decenamide: 32 parts,

[0122] Sodium cyclohexyl oleate: 4 parts.

[0123] The preparation method is as follows: according to proportion, N,N-dimethyl-9-decenamide and sodium cyclopropyl oleate are added to isophorone diamine under stirring conditions, and the mixture is mixed evenly.

[0124] Comparative Example 4

[0125] Provided is an ink dissolving agent, which comprises, by weight:

[0126] Isophorone diamine: 32 parts,

[0127] N,N-dimethyl-9-decenamide: 32 parts,

[0128] Tetrahydrofurfuryl alcohol: 32 parts.

[0129] The preparation method is as follows: N, N-dimethyl-9-decenamide and tetrahydrofurfuryl alcohol are added to isophorone diamine in proportion and mixed under stirring conditions.

[0130] Effect test

[0131] Test method: Take a stainless steel workpiece with ink (after curing) on the surface, put it into a beaker containing 1000g of ink solvent, and soak it at 80℃. Observe and record the time for the ink to fall off every 2 minutes. After the ink falls off, observe the time it takes for all the ink to dissolve (based on the naked eye observation that there is no visible ink residue on the stainless steel workpiece, in the mesh and at the bottom of the solution). The maximum soaking time is 30 minutes.

[0132] Then take out the workpiece with the ink completely dissolved on the surface, rinse it twice with pure water, dry it, and wipe the surface of the workpiece with a soft white cloth. If there is any color residue on the white cloth, it proves that the pigment component in the ink is sticking back to the surface of the stainless steel workpiece.

[0133] The ink dissolving agent is the ink dissolving agent of Example 1 and Comparative Examples 1 to 4.

[0134] The test results are shown in Table 1.

[0135] Table 1

[0136]

[0137] It can be seen from Table 1 that Examples 1, 2, and 3 can effectively dissolve the ink, and the pigment components in the ink will not stick to the surface of the workpiece.

[0138] By comparing Example 1 with Comparative Examples 1 and 2, it can be found that isophorone diamine and N,N-dimethyl-9-decenamide have a synergistic effect of dissolving ink in the formula. When the two are combined in a certain proportion, the ink dissolution speed can be significantly improved.

[0139] It can be seen from Example 1 and Comparative Example 3 that tetrahydrofurfuryl alcohol can effectively swell the ink on the surface of stainless steel, thereby causing the ink to fall off the surface of the stainless steel substrate, and isophorone diamine and N,N-dimethyl-9-decenamide can only dissolve the swollen ink. If the ink cannot swell, isophorone diamine and N,N-dimethyl-9-decenamide will not be able to dissolve it.

[0140] From Example 1 and Comparative Example 4, it can be concluded that cyclopropyl oleate can effectively prevent the pigment component in the ink from adhering to the surface of the stainless steel workpiece. The stainless steel ink dissolving agent of the present invention can completely dissolve the ink on the stainless steel surface and has high practical application value.

[0141] The present invention has been described in detail above with reference to the embodiments. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the spirit of the present invention.

Claims

1. An ink dissolving agent, characterized in that: In parts by weight, the components include: Isophorone diamine: 30 to 40 parts, N,N-dimethyl-9-decenamide: 15 to 80 parts, Tetrahydrofurfuryl alcohol: 30~40 parts, Cyclopropyl oleate: 3 to 5 parts.

2. The ink dissolving agent according to claim 1, characterized in that: In parts by weight, the components include: Isophorone diamine: 30 to 35 parts, N,N-dimethyl-9-decenamide: 15 to 70 parts, Tetrahydrofurfuryl alcohol: 30~35 parts, Cyclopropyl oleate: 3 to 5 parts.

3. The ink dissolving agent according to claim 2, characterized in that: In parts by weight, the components include: Isophorone diamine: 32 parts, N,N-dimethyl-9-decenamide: 32 parts, Tetrahydrofurfuryl alcohol: 32 parts, Cyclohexyl oleate: 4 parts.

4. The ink dissolving agent according to any one of claims 1 to 3, characterized in that The cyclohexyl oleate salt includes at least one of sodium cyclohexyl oleate, potassium cyclohexyl oleate and ammonium cyclohexyl oleate.

5. A method for preparing the ink dissolving agent according to any one of claims 1 to 4, characterized in that: According to the ratio, the N,N-dimethyl-9-decenamide, tetrahydrofurfuryl alcohol and cyclopropyl oleate are added to the isophorone diamine and mixed evenly.

6. An ink dissolving method, characterized in that: The workpiece to be ink-dissolved is immersed in the ink-dissolving agent according to any one of claims 1 to 4.

7. The ink dissolving method according to claim 6, characterized in that: The soaking temperature is 70°C to 90°C.

8. The ink dissolving method according to claim 6, characterized in that: The soaking time is 2 min to 10 min.

9. The ink dissolving method according to claim 6, characterized in that: The workpiece to be dissolved in ink comprises a stainless steel workpiece.

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