A water-based adhesive remover

Abstract

The invention discloses an aqueous adhesive remover, which comprises the following components and weight parts: 25-50 weight parts of water; 10-20 weight parts of polyethylene glycol 400; 20-30 weight parts of dimethylformamide; 5-10 weight parts of dichloromethane; 5-10 weight parts of dichloroethane; 5-10 weight parts of dibromomethane; 5-10 weight parts of glycerol; 0.1 weight part of vitamin E; 1-2 weight parts of OP-10; 1-2 weight parts of penetrant; 0.1-0.2 weight parts of essence. The aqueous adhesive remover for removing offset printing of the patent invention has the characteristics of being not easy to ignite, being environmentally friendly and non-toxic, non-corrosive, having a long effective period, having a good adhesive removal effect, having good stability, and the like; it meets the requirements of safe storage and use, and has no obvious influence on the environment and human health.

Description

Technical Field

[0001] The present invention relates to an aqueous clear glue agent. Background Art

[0002] At present, the cleaning agents for removing offset printing on the market are mainly made of acetone, xylene, solvent oil, rosin water, etc. as raw materials, and then mixed with some other types of substances. On the one hand, this kind of degumming agent is generally flammable and does not meet the requirements of factory environmental assessment. In addition, it has the disadvantages of being environmentally unfriendly, having a strong pungent odor, damaging health, and even potential carcinogenic risks.

[0003] The present invention is in urgent need of a water-based adhesive remover for removing offset printing which is not easy to ignite, is environmentally friendly, non-toxic, non-corrosive, has a long validity period, and has a good adhesive removal effect. Summary of the invention

[0004] In order to solve the above problems, the present disclosure provides an aqueous clear glue agent, comprising the following components and weight parts:

[0005]

[0006]

[0007] The penetrant is a hydrogen-bonded cross-linked PVA and β-cyclodextrin complex.

[0008] The number average molecular weight of the polyvinyl alcohol is 20,000-100,000.

[0009] The mass ratio of the PVA to β-cyclodextrin is 1.2-2:1.

[0010] The preparation method of the hydrogen-bonded cross-linked PVA and β-cyclodextrin complex is as follows:

[0011] Preparation of PVA solution

[0012] Dissolving PVA: Add 100 parts by weight of PVA into deionized water; heat to 90-95°C on a heating plate using a magnetic stirrer, and stir for 1-2 hours to completely dissolve the PVA;

[0013] Preparation of β-cyclodextrin solution

[0014] Add an appropriate amount of β-cyclodextrin to deionized water and stir on a magnetic stirrer until completely dissolved; adjust the pH of the solution to 6.5-7.0 using acetic acid or ammonia water;

[0015] PVA mixed with β-cyclodextrin

[0016] The PVA solution and the β-cyclodextrin solution are mixed in a mass ratio of 1.2-2:1 between PVA and β-cyclodextrin, and stirred evenly with a magnetic stirrer to form a uniform solution; ethanol is added to adjust the concentration and fluidity of the solution;

[0017] Hydrogen bonding cross-linking reaction

[0018] Add 0.5-2 parts by weight of glutaraldehyde to the mixed solution; place the mixed solution at room temperature and continue stirring for 30-60 minutes;

[0019] Evaluation and regulation of cross-linking effects

[0020] During the reaction, use ammonia or acetic acid to adjust the solution pH to between 6 and 7 to ensure that the hydrogen bond cross-linking reaction is in the best state; stir and react for 2-3 hours;

[0021] Solvent evaporation and curing

[0022] The reaction solution is heated to 50-60° C., and the solvent is gradually evaporated under ventilation conditions to form a cross-linked PVA-β-cyclodextrin complex membrane;

[0023] The final product is placed in a ventilated place or dried in an oven at 50-60° C. until a transparent and uniform PVA-β-cyclodextrin complex is obtained.

[0024] Beneficial effects of the present invention:

[0025] The water-based adhesive remover for removing offset printing invented by this patent has the characteristics of not easy to ignite, environmentally friendly and non-toxic, non-corrosive, long validity period, good adhesive removal effect, good stability, etc.; it meets the requirements of safe storage and use, and has no obvious impact on the environment and human health.

[0026] The PVA and β-cyclodextrin of the present invention form a cross-linked structure through hydrogen bonds, which increases their interaction force. The formation of hydrogen bonds helps to enhance the stability of the complex, so that the complex can better bind to stains and maintain structural stability during the cleaning process, thereby improving cleaning efficiency.

[0027] The hydrogen bond crosslinking of the present invention not only provides a stable connection, but also can dynamically break and reform under specific conditions (such as temperature changes, pH changes, etc.). This dynamic property enables the composite to flexibly adapt to different cleaning environments and effectively "capture" and "adsorb" pollutants during the cleaning process. The composite of PVA and β-cyclodextrin provides a hydrophilic surface through hydrogen bond crosslinking, which can promote the contact between water and stains. At the same time, β-cyclodextrin enhances the dissolution and removal of hydrophobic pollutants through the "encapsulation" effect. This synergistic effect effectively improves the cleaning effect, especially for complex pollutants (such as mixed pollutants of grease and pigments). It has a significant decontamination ability.

[0028] The above and other features, aspects and advantages of the present application will be more readily understood with reference to the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a comparison chart of the effects of the triamine board in Example 1 before and after being scrubbed with board washing water.

[0030] Figure 2 This is a comparison chart of the effects of the metal plate in Example 1 before and after being scrubbed with water. Specific implementation plan

[0031] The chemical composition and ratio range of a water-based degumming agent product of the present invention are as follows:

[0032]

[0033] In the embodiment of the present invention, polyethylene glycol 400:

[0034] It is non-toxic and non-irritating, has good water solubility, and has good compatibility with many organic components. It is relatively stable when exposed to heat, has a flash point of 270°C, and is a non-flammable and explosive solvent.

[0035] In the embodiments of the present invention, dimethylformamide:

[0036] A highly polar hydrophilic solvent that is miscible with water and most organic solvents. It has good solubility for offset printing, can maintain good solubility in a wide temperature range, and has a high flash point and chemical stability.

[0037] In the embodiments of the present invention, dichloromethane, dichloroethane, dibromomethane:

[0038] These are non-flammable, non-ODS solvents with low boiling points. The volatile vapors can terminate the free radical chain reactions of some flammable solvents during combustion, thus playing a certain flame retardant role. In addition, these solvents have the advantages of strong dissolving power and low toxicity, and can be well miscible with polyethylene glycol 400 and dimethylformamide.

[0039] In the embodiment of the present invention, glycerin and vitamin E have the functions of moisturizing, preventing dry skin and repairing skin to protect the hand skin of the user.

[0040] In the embodiments of the present invention, OP-10, penetrant, and flavor: improve system stability, dissolution capacity, and experience effect.

[0041] In the following embodiments:

[0042] Polyethylene glycol 400: Polyethylene glycol 400 from Tianjin Damao Chemical Reagent Factory;

[0043] Dimethylformamide: Shanghai MacLean Biochemical Technology Co., Ltd. Dimethylformamide;

[0044] Dichloromethane: Shanghai MacLean Biochemical Technology Co., Ltd. Dichloromethane;

[0045] Ethylene dichloride: Ethylene dichloride from Shanghai MacLean Biochemical Technology Co., Ltd.;

[0046] Dibromomethane: Dibromomethane from Shanghai MacLean Biochemical Technology Co., Ltd.;

[0047] Glycerol: Xi'an Tianmao Baoding Biotechnology Co., Ltd. Glycerol;

[0048] Vitamin E: Vitamin E from Huhui Biotechnology Co., Ltd.;

[0049] OP-10: Tianjin Zhonglian Chemical Reagent Co., Ltd. OP-10;

[0050] Flavor: Lemon flavor produced by Guangzhou Aoqisha Technology Co., Ltd.

[0051] The present invention uses a suitable aqueous solvent and water as the main solvent to ensure environmental protection.

[0052] The present invention uses some non-flammable or high flash point reagents with good dissolving ability for offset printing as effective ingredients to ensure that the reagent is non-flammable and has a good effect of removing offset printing.

[0053] Preparation method of penetrant:

[0054] Preparation of PVA solution

[0055] Dissolving PVA: Add 100 parts by weight of PVA (80,000 molecular weight) into deionized water; heat to 95°C on a hot plate using a magnetic stirrer and stir for 2 hours to completely dissolve the PVA;

[0056] Preparation of β-cyclodextrin solution

[0057] Add an appropriate amount of β-cyclodextrin to deionized water and stir on a magnetic stirrer until completely dissolved; adjust the pH of the solution to 6.5-7.0 using acetic acid;

[0058] PVA mixed with β-cyclodextrin

[0059] The PVA solution and the β-cyclodextrin solution were mixed at a mass ratio of PVA to β-cyclodextrin of 1.5:1, and stirred evenly using a magnetic stirrer to form a uniform solution; ethanol was added to adjust the concentration and fluidity of the solution;

[0060] Hydrogen bonding cross-linking reaction

[0061] Add 1 part by weight of glutaraldehyde to the mixed solution; place the mixed solution at room temperature and continue stirring for 60 minutes;

[0062] Evaluation and regulation of cross-linking effects

[0063] During the reaction, ammonia or acetic acid was used to adjust the solution pH to between 6 and 7 to ensure that the hydrogen bond cross-linking reaction was in the best state; stirring and reacting for 2 hours;

[0064] Solvent evaporation and curing

[0065] The reaction solution was heated to 60° C., and the solvent was gradually evaporated under ventilation conditions to form a cross-linked PVA-β-cyclodextrin complex membrane;

[0066] The mixture was dried in an oven at 60° C. until a transparent and uniform PVA-β-cyclodextrin complex was obtained.

[0067] The present invention improves the desizing effect through the synergistic effect of other additives, thereby ensuring the stability of the formula and improving the effect.

[0068] Example 1

[0069]

[0070] Example 2

[0071]

[0072]

[0073] Example 3

[0074]

[0075] Comparative Example 1

[0076] The same as in Example 1, but without adding the permeabilizing agent hydrogen-bonded cross-linked PVA and β-cyclodextrin complex.

[0077] Comparative Example 2

[0078] As in Example 1, PVA and β-cyclodextrin were added to replace the hydrogen-bonded cross-linked PVA and β-cyclodextrin complex of the penetrant.

[0079] Comparative Example 3

[0080] Similar to Example 1, the hydrogen-bonded cross-linked PVA and β-cyclodextrin complex of the penetrant adopts a mass ratio of PVA to β-cyclodextrin of 1:0.5.

[0081] Comparative Example 4

[0082] Similar to Example 1, the hydrogen-bonded cross-linked PVA and β-cyclodextrin complex of the penetrant has a mass ratio of PVA to β-cyclodextrin of 1:1.2.

[0083] Comparative Example 5

[0084] Similar to Example 1, the hydrogen-bonded cross-linked PVA and β-cyclodextrin complex of the penetrant adopts a mass ratio of PVA to β-cyclodextrin of 1:2.

[0085] Comparative Example 6

[0086] Similar to Example 1, the hydrogen-bonded cross-linked PVA and β-cyclodextrin complex of the penetrant has a mass ratio of PVA to β-cyclodextrin of 1:3.

[0087] The aforementioned cleaning water was used to clean 10 triamine boards and 10 metal boards respectively. Three drops of offset printing were dripped on the surface. The scores were scored manually and the average score was calculated. The scores are as follows:

[0088] The surface glue is completely impossible to clean, 5 points;

[0089] Surface glue cleaning and removal of 1 drop, 4 points;

[0090] Surface glue cleaning and removal of 2 drops, 3 points;

[0091] The surface glue is completely removed, with a large amount of residue 2 points;

[0092] The surface glue is completely removed, with a small amount of residue remaining for 1 point;

[0093] The surface glue is completely removed without any residue, 0 points.

[0094]

[0095]

[0096] It can be seen that the solution of the present invention has a very good cleaning effect.

[0097] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water-based clear glue agent, characterized in that: It includes the following components and weight parts:

2. A water-based adhesive clearing agent according to claim 1, characterized in that: The penetrant is a hydrogen-bonded cross-linked PVA and β-cyclodextrin complex.

3. A water-based adhesive clearing agent according to claim 2, characterized in that: The number average molecular weight of the polyvinyl alcohol is 20,000-100,000.

4. A water-based adhesive clearing agent according to claim 2, characterized in that: The mass ratio of the PVA to β-cyclodextrin is 1.2-2:

1.

5. A water-based adhesive clearing agent according to claim 2, characterized in that: The preparation method of the hydrogen-bonded cross-linked PVA and β-cyclodextrin complex is as follows: Preparation of PVA solution Dissolving PVA: Add 100 parts by weight of PVA into deionized water; heat to 90-95°C on a heating plate using a magnetic stirrer, and stir for 1-2 hours to completely dissolve the PVA; Preparation of β-cyclodextrin solution Add an appropriate amount of β-cyclodextrin to deionized water and stir on a magnetic stirrer until completely dissolved; adjust the pH of the solution to 6.5-7.0 using acetic acid or ammonia water; PVA mixed with β-cyclodextrin The PVA solution and the β-cyclodextrin solution are mixed at a mass ratio of 1.2-2:1 between PVA and β-cyclodextrin, and stirred evenly using a magnetic stirrer to form a uniform solution; Ethanol was added to adjust the concentration and fluidity of the solution; Hydrogen bonding cross-linking reaction Add 0.5-2 parts by weight of glutaraldehyde to the mixed solution; place the mixed solution at room temperature and continue stirring for 30-60 minutes; Evaluation and regulation of cross-linking effects During the reaction, use ammonia or acetic acid to adjust the solution pH to between 6 and 7 to ensure that the hydrogen bond cross-linking reaction is in the best state; stir and react for 2-3 hours; Solvent evaporation and curing The reaction solution is heated to 50-60° C., and the solvent is gradually evaporated under ventilation conditions to form a cross-linked PVA-β-cyclodextrin complex membrane; The final product is placed in a ventilated place or dried in an oven at 50-60° C. until a transparent and uniform PVA-β-cyclodextrin complex is obtained.

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