Titanium-aluminum composite material water-based paint remover, preparation method and application thereof

Abstract

The application discloses a titanium-aluminum composite material water-based paint remover, which comprises organic alkali, active agent, solvent and corrosion inhibitor; the mass ratio of the organic alkali, active agent, solvent and corrosion inhibitor is 15-20:5-10:40-50:3-7; the organic alkali comprises diethylene triamine and monoethanolamine; the mass ratio of the diethylene triamine and monoethanolamine is 3-5:1-3. The titanium-aluminum composite material water-based paint remover provided by the application has excellent paint removing performance and corrosion prevention performance due to the specific proportion of the organic alkali, active agent, solvent and corrosion inhibitor, and the specific proportion of the diethylene triamine and monoethanolamine in the organic alkali.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of paint removers, in particular to a titanium-aluminum composite material water-based paint remover, a preparation method and application thereof. BACKGROUND

[0002] UV (ultraviolet light curing) ink refers to an ink that is cured and dried under the irradiation of ultraviolet light, in which monomers in the ink binder are polymerized into polymers by ultraviolet light of different wavelengths and energy. UV ink also belongs to ink. As ink, they must have bright colors (except in special cases), good printing suitability, appropriate curing and drying rate. At the same time, it has good adhesion, and has properties such as wear resistance, corrosion resistance, weather resistance, etc., and plays a good protective role in the metal processing process, and is widely used.

[0003] The mobile phone frame will use UV ink for shielding protection during processing, and the paint remover is needed to remove it after processing and protection. The paint remover for titanium-aluminum composite material is a new product in the industry, which has high technical difficulty. Under the existing water-based paint remover technology, UV ink can be removed in a strong alkali high-temperature water-based paint remover system, but strong alkali can seriously corrode aluminum alloy. The UV ink on the market can be removed in a high-temperature alkaline solvent-based paint remover, and titanium-aluminum alloy can not be corroded, but the VOC content is extremely high, the volatility is extremely strong, the smell is pungent, the harm to the human body is large, and the environmental pollution is serious.

[0004] In summary, through the applicant's massive search, at least the existing aluminum composite material water-based paint remover has the problems of strong corrosion, poor paint removal performance and environmental protection. Therefore, it is necessary to develop or improve a titanium-aluminum composite material water-based paint remover, a preparation method and application thereof. SUMMARY

[0005] Therefore, in order to solve the problems of strong corrosion, poor paint removal performance and environmental protection of the existing aluminum composite material water-based paint remover, the present application provides a titanium-aluminum composite material water-based paint remover, a preparation method and application thereof, and the specific technical solutions are as follows:

[0006] A titanium-aluminum composite material water-based paint remover comprises organic alkali, active agent, solvent and corrosion inhibitor.

[0007] The mass ratio of the organic alkali, active agent, solvent and corrosion inhibitor is 15-20:5-10:40-50:3-7.

[0008] The organic alkali comprises diethylene triamine and monoethanolamine.

[0009] The mass ratio of the diethylene triamine and monoethanolamine is 3-5:1-3.

[0010] Further, the active agent is dodecyl dimethyl benzyl ammonium cationic surfactant.

[0011] Further, the solvent comprises high-boiling complex ester DBE and tetrahydrofurfuryl alcohol.

[0012] The mass ratio of the high-boiling complex ester DBE and tetrahydrofurfuryl alcohol is 1-3:1-3.

[0013] Further, the corrosion inhibitor comprises seven sodium salts of diethylene triamine penta methylene phosphonic acid and methyl benzotriazole.

[0014] The mass ratio of the seven sodium salts of diethylene triamine penta methylene phosphonic acid and methyl benzotriazole is 3-7:3-7.

[0015] The technical solution also provides a preparation method of the titanium-aluminum composite material aqueous paint remover.

[0016] The organic base is added to the solvent, then stirred uniformly at a speed of 400-500 r / min, then heated to 30-40 DEG C, then ultrasonically treated, then stirred at a speed of 600-700 r / min, then the active agent is added, then stirred at a speed of 800-900 r / min, then the corrosion inhibitor is added, then stirred uniformly at a speed of 1000-1200 r / min, then cooled to 22-28 DEG C, then stirred uniformly at a speed of 900-1000 r / min, to obtain the titanium-aluminum composite material aqueous paint remover.

[0017] Further, the frequency of the ultrasonic treatment is 60-100 kHz, and the ultrasonic treatment time is 30-90 s.

[0018] The technical solution also provides an application of the titanium-aluminum composite material aqueous paint remover, which comprises the following steps:

[0019] The cleaning agent is added to the cleaning tank, then the titanium-aluminum composite material is added, soaked for 2-3 h, then washed with pure water for multiple times until the pH of the washing liquid is 6.5-7.5, then dried, to obtain the cleaned titanium-aluminum composite material.

[0020] The titanium-aluminum composite material aqueous paint remover is added to the paint remover container, then the cleaned titanium-aluminum composite material is added, then heated to 80-90 DEG C, then paint removal treatment is performed, to obtain the pre-paint removal titanium-aluminum composite material.

[0021] The stabilizing agent is added to the cleaning tank, then the pre-paint removal titanium-aluminum composite material is added, soaked for 1.3-1.7 h, then washed with pure water for multiple times until the pH of the washing liquid is 6.5-7.5, then dried, to obtain the paint removal titanium-aluminum composite material.

[0022] Further, the cleaning agent is 0.1-0.5 mol / L hydrochloric acid.

[0023] Further, the stabilizing agent is 0.5-1.5 mol / L sodium carbonate.

[0024] Further, the paint removal treatment time is 10-20 min.

[0025] The titanium-aluminum composite material water-based paint remover provided by the technical scheme has excellent paint removal performance and corrosion prevention performance because it includes specific proportions of organic alkali, active agent, solvent and corrosion inhibitor, and the organic alkali includes specific proportions of diethylene triamine and monoethanolamine. Specifically, the use of diethylene triamine and monoethanolamine as the alkaline base system reduces the corrosion of the titanium-aluminum alloy substrate and enables quick removal of masking ink. Further, the use of environmentally friendly high-boiling point composite ester (DBE) and tetrahydrofurfuryl alcohol enables the solvent to be continuously removed and evaporated, and the solvent concentration to continuously decrease, and the solvent has a high boiling point and low odor. Further, the paint remover system uses an organic alkali system, so the alkaline corrosion inhibitor, i.e., diethylene triamine penta methylene phosphonic acid seven sodium (DETPMP.Na7) and methyl benzotriazole (TTA), is selected to be resistant to alkali, thereby enabling the titanium-aluminum composite material water-based paint remover to have a good corrosion prevention effect on the titanium-aluminum alloy in an alkaline environment at a high temperature. Further, the use of dodecyl dimethyl benzyl ammonium cationic surfactant enables the ink to be continuously dissolved, and the nano-filling particles in the ink to be adsorbed on the metal surface, thereby preventing the generation of adverse appearances such as a hazy metal surface, white circles and white spots. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the protection scope of the present application.

[0027] Unless otherwise defined, 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 application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0028] The titanium-aluminum composite material water-based paint remover in an embodiment of the present application includes organic alkali, active agent, solvent and corrosion inhibitor.

[0029] The mass ratio of the organic base, the active agent, the solvent and the corrosion inhibitor is 15-20:5-10:40-50:3-7;

[0030] The organic base includes diethylene triamine and monoethanolamine;

[0031] The mass ratio of the diethylene triamine and the monoethanolamine is 3-5:1-3.

[0032] In one of the embodiments, the active agent is dodecyl dimethyl benzyl ammonium cationic surfactant.

[0033] In one of the embodiments, the solvent includes high-boiling-point complex ester DBE and tetrahydrofurfuryl alcohol;

[0034] The mass ratio of the high-boiling-point complex ester DBE and the tetrahydrofurfuryl alcohol is 1-3:1-3.

[0035] In one of the embodiments, the corrosion inhibitor includes seven sodium diethylene triamine pentamethylene phosphonic acid and methyl benzotriazole;

[0036] The mass ratio of the seven sodium diethylene triamine pentamethylene phosphonic acid and the methyl benzotriazole is 3-7:3-7.

[0037] In one of the embodiments, the technical solution provides a preparation method of a titanium-aluminum composite material aqueous paint remover, which includes the following steps:

[0038] The organic base is added into the solvent, then stirred uniformly at a speed of 400-500 r / min, then heated to 30-40 DEG C, then ultrasonically treated, then stirred at a speed of 600-700 r / min, then the active agent is added, then stirred at a speed of 800-900 r / min, then the corrosion inhibitor is added, then stirred uniformly at a speed of 1000-1200 r / min, then cooled to 22-28 DEG C, then stirred uniformly at a speed of 900-1000 r / min, to obtain the titanium-aluminum composite material aqueous paint remover.

[0039] In one of the embodiments, the frequency of the ultrasonic treatment is 60-100 kHz, and the time of the ultrasonic treatment is 30-90 s.

[0040] In one of the embodiments, the technical solution provides an application of a titanium-aluminum composite material aqueous paint remover, which includes the following steps:

[0041] The cleaning agent is added into the cleaning tank, then the titanium-aluminum composite material is added, soaked for 2-3 h, then washed with pure water for multiple times until the pH of the washing liquid is 6.5-7.5, then dried, to obtain the cleaned titanium-aluminum composite material;

[0042] The titanium-aluminum composite material water-based paint remover is added into a paint remover container, then the titanium-aluminum composite material after cleaning is added, then the temperature is raised to 80-90 DEG C, then paint removal treatment is carried out, and a titanium-aluminum composite material after pre-paint removal is obtained.

[0043] The stabilizing agent is added into a cleaning tank, then the titanium-aluminum composite material after pre-paint removal is added, then soaking is carried out for 1.3-1.7 h, then multiple pure water washing is carried out until the pH of the washing liquid is 6.5-7.5, then drying is carried out, and a titanium-aluminum composite material after paint removal is obtained.

[0044] In one of the embodiments, the cleaning agent is 0.1-0.5 mol / L hydrochloric acid.

[0045] In one of the embodiments, the stabilizing agent is 0.5-1.5 mol / L sodium carbonate.

[0046] In one of the embodiments, the paint removal treatment time is 10-20 min.

[0047] The embodiments of the application will be described in detail below with specific examples.

[0048] Example 1:

[0049] Preparation of the titanium-aluminum composite material water-based paint remover: the organic base is added into the solvent, then uniform stirring is carried out at a speed of 450 r / min, then the temperature is raised to 35 DEG C, then ultrasonic treatment is carried out at a frequency of 80 kHz for 60 s, then stirring is carried out at a speed of 650 r / min, then the dodecyl dimethyl benzyl ammonium cationic surfactant is added, then stirring is carried out at a speed of 850 r / min, then the corrosion inhibitor is added, then uniform stirring is carried out at a speed of 1100 r / min, then cooling is carried out to 25 DEG C, then uniform stirring is carried out at a speed of 950 r / min, and the titanium-aluminum composite material water-based paint remover is obtained; wherein the organic base includes diethylene triamine and monoethanolamine, the mass ratio of diethylene triamine and monoethanolamine is 4:2; the solvent includes high-boiling-point composite ester DBE and tetrahydrofurfuryl alcohol, the mass ratio of high-boiling-point composite ester DBE and tetrahydrofurfuryl alcohol is 1:1; the corrosion inhibitor includes diethylene triamine penta methylene phosphonic acid seven sodium and methyl benzotriazole, the mass ratio of diethylene triamine penta methylene phosphonic acid seven sodium and methyl benzotriazole is 5:5; the mass ratio of the organic base, the active agent, the solvent and the corrosion inhibitor is 17:7:45:5;

[0050] Titanium-aluminum composite material aqueous paint removal: 0.3 mol / L hydrochloric acid is added to a cleaning tank, then the titanium-aluminum composite material is added, soaked for 2.5 h, then washed with pure water for multiple times until the pH of the washing liquid is 7, then dried to obtain the cleaned titanium-aluminum composite material; the above titanium-aluminum composite material aqueous paint remover is added to a paint remover container, then the above cleaned titanium-aluminum composite material is added, then heated to 85°C, then soaked for 15 min for paint removal to obtain the pre-paint-removed titanium-aluminum composite material; 1 mol / L sodium carbonate is added to a cleaning tank, then the above pre-paint-removed titanium-aluminum composite material is added, soaked for 1.5 h, then washed with pure water for multiple times until the pH of the washing liquid is 7, then dried to obtain the paint-removed titanium-aluminum composite material.

[0051] Example 2:

[0052] Preparation of titanium-aluminum composite material aqueous paint remover: organic base is added to a solvent, then stirred uniformly at a speed of 450 r / min, then heated to 35°C, then ultrasonically treated at a frequency of 80 kHz for 60 s, then stirred at a speed of 650 r / min, then dodecyl dimethyl benzyl ammonium cationic surfactant is added, then stirred at a speed of 850 r / min, then corrosion inhibitor is added, then stirred uniformly at a speed of 1100 r / min, then cooled to 25°C, then stirred uniformly at a speed of 950 r / min to obtain the titanium-aluminum composite material aqueous paint remover; wherein the organic base includes diethylene triamine and monoethanolamine, the mass ratio of diethylene triamine and monoethanolamine is 3:2; the solvent includes high-boiling-point composite ester DBE and tetrahydrofurfuryl alcohol, the mass ratio of high-boiling-point composite ester DBE and tetrahydrofurfuryl alcohol is 1:1; the corrosion inhibitor includes seven sodium salts of diethylene triamine pentamethylene phosphonic acid and methyl benzotriazole, the mass ratio of seven sodium salts of diethylene triamine pentamethylene phosphonic acid and methyl benzotriazole is 5:5; the mass ratio of the organic base, active agent, solvent and corrosion inhibitor is 17:7:45:5;

[0053] Titanium-aluminum composite material aqueous paint removal: 0.3 mol / L hydrochloric acid is added to a cleaning tank, then the titanium-aluminum composite material is added, soaked for 2.5 h, then washed with pure water for multiple times until the pH of the washing liquid is 7, then dried to obtain the cleaned titanium-aluminum composite material; the above titanium-aluminum composite material aqueous paint remover is added to a paint remover container, then the above cleaned titanium-aluminum composite material is added, then heated to 85°C, then soaked for 15 min for paint removal to obtain the pre-paint-removed titanium-aluminum composite material; 1 mol / L sodium carbonate is added to a cleaning tank, then the above pre-paint-removed titanium-aluminum composite material is added, soaked for 1.5 h, then washed with pure water for multiple times until the pH of the washing liquid is 7, then dried to obtain the paint-removed titanium-aluminum composite material.

[0054] Example 3:

[0055] Preparation of titanium-aluminum composite material aqueous paint remover: add organic base to solvent, then stir uniformly at a speed of 450 r / min, then warm up to 35℃, then ultrasonic at a frequency of 80 kHz for 60 s, then stir at a speed of 650 r / min, then add dodecyl dimethyl benzyl ammonium cationic surfactant, then stir at a speed of 850 r / min, then add corrosion inhibitor, then stir uniformly at a speed of 1100 r / min, then cool down to 25℃, then stir uniformly at a speed of 950 r / min, to obtain titanium-aluminum composite material aqueous paint remover; wherein the organic base includes diethylene triamine and monoethanolamine, the mass ratio of diethylene triamine and monoethanolamine is 5:2; the solvent includes high-boiling-point composite ester DBE and tetrahydrofurfuryl alcohol, the mass ratio of high-boiling-point composite ester DBE and tetrahydrofurfuryl alcohol is 1:1; the corrosion inhibitor includes seven sodium diethylene triamine pentamethylene phosphonic acid and methyl benzotriazole, the mass ratio of seven sodium diethylene triamine pentamethylene phosphonic acid and methyl benzotriazole is 5:5; the mass ratio of organic base, active agent, solvent and corrosion inhibitor is 17:7:45:5;

[0056] Titanium-aluminum composite material aqueous paint removal: add 0.3 mol / L hydrochloric acid to the cleaning tank, then add titanium-aluminum composite material, soak for 2.5 h, then wash with pure water for multiple times until the pH of the washing liquid is 7, then dry to obtain cleaned titanium-aluminum composite material; add the above-mentioned titanium-aluminum composite material aqueous paint remover to the paint remover container, then add the above-mentioned cleaned titanium-aluminum composite material, then warm up to 85℃, then soak for 15 min paint removal to obtain pre-paint-removed titanium-aluminum composite material; add 1 mol / L sodium carbonate to the cleaning tank, then add the above-mentioned pre-paint-removed titanium-aluminum composite material, soak for 1.5 h, then wash with pure water for multiple times until the pH of the washing liquid is 7, then dry to obtain paint-removed titanium-aluminum composite material.

[0057] Example 4:

[0058] Preparation of titanium-aluminum composite material aqueous paint remover: add organic base to solvent, then stir uniformly at a speed of 450 r / min, then warm up to 35℃, then ultrasonic at a frequency of 80 kHz for 60 s, then stir at a speed of 650 r / min, then add dodecyl dimethyl benzyl ammonium cationic surfactant, then stir at a speed of 850 r / min, then add corrosion inhibitor, then stir uniformly at a speed of 1100 r / min, then cool down to 25℃, then stir uniformly at a speed of 950 r / min, to obtain titanium-aluminum composite material aqueous paint remover; wherein the organic base includes diethylene triamine and monoethanolamine, the mass ratio of diethylene triamine and monoethanolamine is 4:2; the solvent includes high-boiling-point composite ester DBE and tetrahydrofurfuryl alcohol, the mass ratio of high-boiling-point composite ester DBE and tetrahydrofurfuryl alcohol is 1:1; the corrosion inhibitor includes seven sodium diethylene triamine pentamethylene phosphonic acid and methyl benzotriazole, the mass ratio of seven sodium diethylene triamine pentamethylene phosphonic acid and methyl benzotriazole is 3:5; the mass ratio of organic base, active agent, solvent and corrosion inhibitor is 17:7:45:5;

[0059] Titanium-aluminum composite material aqueous paint removal: add 0.3 mol / L hydrochloric acid to the cleaning tank, then add titanium-aluminum composite material, soak for 2.5 h, then wash with pure water for multiple times until the pH of the washing liquid is 7, then dry to obtain cleaned titanium-aluminum composite material; add the above-mentioned titanium-aluminum composite material aqueous paint remover to the paint remover container, then add the above-mentioned cleaned titanium-aluminum composite material, then warm up to 85℃, then soak for 15 min for paint removal, to obtain pre-paint-removed titanium-aluminum composite material; add 1 mol / L sodium carbonate to the cleaning tank, then add the above-mentioned pre-paint-removed titanium-aluminum composite material, soak for 1.5 h, then wash with pure water for multiple times until the pH of the washing liquid is 7, then dry to obtain paint-removed titanium-aluminum composite material.

[0060] Example 5:

[0061] Preparation of titanium-aluminum composite material aqueous paint remover: organic base is added to the solvent, then stirred uniformly at a speed of 450 r / min, then heated to 35℃, then ultrasonic at a frequency of 80 kHz for 60 s, then stirred at a speed of 650 r / min, then dodecyl dimethyl benzyl ammonium cationic surfactant is added, then stirred at a speed of 850 r / min, then corrosion inhibitor is added, then stirred uniformly at a speed of 1100 r / min, then cooled to 25℃, then stirred uniformly at a speed of 950 r / min, to obtain the titanium-aluminum composite material aqueous paint remover; wherein the organic base includes diethylene triamine and monoethanolamine, the mass ratio of diethylene triamine and monoethanolamine is 4:2; the solvent includes high-boiling-point composite ester DBE and tetrahydrofurfuryl alcohol, the mass ratio of high-boiling-point composite ester DBE and tetrahydrofurfuryl alcohol is 1:1; the corrosion inhibitor includes seven sodium diethylene triamine pentamethylene phosphonic acid and methyl benzotriazole, the mass ratio of seven sodium diethylene triamine pentamethylene phosphonic acid and methyl benzotriazole is 7:5; the mass ratio of organic base, active agent, solvent and corrosion inhibitor is 17:7:45:5;

[0062] Titanium-aluminum composite material aqueous paint removal: 0.3 mol / L hydrochloric acid is added to the cleaning tank, then the titanium-aluminum composite material is added, soaked for 2.5 h, then washed with pure water for multiple times until the pH of the washing liquid is 7, then dried to obtain the cleaned titanium-aluminum composite material; the above-mentioned titanium-aluminum composite material aqueous paint remover is added to the paint remover container, then the above-mentioned cleaned titanium-aluminum composite material is added, then heated to 85℃, then soaked for 15 min paint removal, to obtain the pre-paint removal titanium-aluminum composite material; 1 mol / L sodium carbonate is added to the cleaning tank, then the above-mentioned pre-paint removal titanium-aluminum composite material is added, soaked for 1.5 h, then washed with pure water for multiple times until the pH of the washing liquid is 7, then dried to obtain the paint removal titanium-aluminum composite material.

[0063] Comparative Example 1

[0064] Preparation of the titanium-aluminum composite material aqueous paint remover: add the organic base into the solvent, then stir uniformly at a speed of 450 r / min, then warm up to 35°C, then ultrasonic at a frequency of 80 kHz for 60 s, then stir at a speed of 650 r / min, then add the dodecyl dimethyl benzyl ammonium cationic surfactant, then stir at a speed of 850 r / min, then add the corrosion inhibitor, then stir uniformly at a speed of 1100 r / min, then cool down to 25°C, then stir uniformly at a speed of 950 r / min, to obtain the titanium-aluminum composite material aqueous paint remover; wherein the organic base is monoethanolamine; the solvent comprises high-boiling-point complex ester DBE and tetrahydrofurfuryl alcohol, and the mass ratio of high-boiling-point complex ester DBE to tetrahydrofurfuryl alcohol is 1:1; the corrosion inhibitor comprises heptasodium diethylenetriamine pentamethylene phosphonate and methyl benzotriazole, and the mass ratio of heptasodium diethylenetriamine pentamethylene phosphonate to methyl benzotriazole is 5:5; the mass ratio of the organic base, the active agent, the solvent and the corrosion inhibitor is 17:7:45:5;

[0065] Titanium-aluminum composite material aqueous paint removal: add 0.3 mol / L hydrochloric acid into the cleaning tank, then add the titanium-aluminum composite material, soak for 2.5 h, then perform multiple pure water washing until the pH of the washing liquid is 7, then dry, to obtain the cleaned titanium-aluminum composite material; add the above-mentioned titanium-aluminum composite material aqueous paint remover into the paint remover container, then add the above-mentioned cleaned titanium-aluminum composite material, then warm up to 85°C, then soak for 15 min paint removal, to obtain the pre-paint-removed titanium-aluminum composite material; add 1 mol / L sodium carbonate into the cleaning tank, then add the above-mentioned pre-paint-removed titanium-aluminum composite material, soak for 1.5 h, then perform multiple pure water washing until the pH of the washing liquid is 7, then dry, to obtain the paint-removed titanium-aluminum composite material.

[0066] Comparative Example 2

[0067] Preparation of the titanium-aluminum composite material aqueous paint remover: add the organic base into the solvent, then stir uniformly at a speed of 450 r / min, then warm up to 35°C, then ultrasonic at a frequency of 80 kHz for 60 s, then stir at a speed of 650 r / min, then add the dodecyl dimethyl benzyl ammonium cationic surfactant, then stir at a speed of 850 r / min, then add the corrosion inhibitor, then stir uniformly at a speed of 1100 r / min, then cool down to 25°C, then stir uniformly at a speed of 950 r / min, to obtain the titanium-aluminum composite material aqueous paint remover; wherein the organic base comprises diethylenetriamine and monoethanolamine, and the mass ratio of diethylenetriamine to monoethanolamine is 4:2; the solvent is high-boiling-point complex ester DBE; the corrosion inhibitor comprises heptasodium diethylenetriamine pentamethylene phosphonate and methyl benzotriazole, and the mass ratio of heptasodium diethylenetriamine pentamethylene phosphonate to methyl benzotriazole is 5:5; the mass ratio of the organic base, the active agent, the solvent and the corrosion inhibitor is 17:7:45:5;

[0068] Titanium-aluminum composite material aqueous paint removal: 0.3 mol / L hydrochloric acid was added to a cleaning tank, then the titanium-aluminum composite material was added, soaked for 2.5 h, then washed with pure water for multiple times until the pH of the washing liquid was 7, and then dried to obtain the cleaned titanium-aluminum composite material; the above titanium-aluminum composite material aqueous paint remover was added to a paint remover container, then the above cleaned titanium-aluminum composite material was added, then heated to 85°C, then soaked for 15 min for paint removal to obtain the pre-paint-removed titanium-aluminum composite material; 1 mol / L sodium carbonate was added to a cleaning tank, then the above pre-paint-removed titanium-aluminum composite material was added, soaked for 1.5 h, then washed with pure water for multiple times until the pH of the washing liquid was 7, and then dried to obtain the paint-removed titanium-aluminum composite material.

[0069] Comparative Example 3:

[0070] Preparation of titanium-aluminum composite material aqueous paint remover: organic base was added to a solvent, then stirred uniformly at a speed of 450 r / min, then heated to 35°C, then ultrasonicated at a frequency of 80 kHz for 60 s, then stirred at a speed of 650 r / min, then dodecyl dimethyl benzyl ammonium cationic surfactant was added, then stirred at a speed of 850 r / min, then corrosion inhibitor was added, then stirred uniformly at a speed of 1100 r / min, then cooled to 25°C, then stirred uniformly at a speed of 950 r / min to obtain the titanium-aluminum composite material aqueous paint remover; wherein the organic base comprises diethylene triamine and monoethanolamine, the mass ratio of diethylene triamine and monoethanolamine is 4:2; the solvent comprises high-boiling-point complex ester DBE and tetrahydrofurfuryl alcohol, the mass ratio of high-boiling-point complex ester DBE and tetrahydrofurfuryl alcohol is 1:1; the corrosion inhibitor is methyl benzotriazole; the mass ratio of organic base, active agent, solvent and corrosion inhibitor is 17:7:45:5;

[0071] Titanium-aluminum composite material aqueous paint removal: 0.3 mol / L hydrochloric acid was added to a cleaning tank, then the titanium-aluminum composite material was added, soaked for 2.5 h, then washed with pure water for multiple times until the pH of the washing liquid was 7, and then dried to obtain the cleaned titanium-aluminum composite material; the above titanium-aluminum composite material aqueous paint remover was added to a paint remover container, then the above cleaned titanium-aluminum composite material was added, then heated to 85°C, then soaked for 15 min for paint removal to obtain the pre-paint-removed titanium-aluminum composite material; 1 mol / L sodium carbonate was added to a cleaning tank, then the above pre-paint-removed titanium-aluminum composite material was added, soaked for 1.5 h, then washed with pure water for multiple times until the pH of the washing liquid was 7, and then dried to obtain the paint-removed titanium-aluminum composite material.

[0072] Comparative Example 4:

[0073] Preparation of titanium-aluminum composite material aqueous paint remover: add lactic acid into the solvent, then stir uniformly at a speed of 450 r / min, then warm up to 35 DEG C, then ultrasonic at a frequency of 80 kHz for 60 s, then stir at a speed of 650 r / min, then add dodecyl dimethyl benzyl ammonium cationic surfactant, then stir at a speed of 850 r / min, then add corrosion inhibitor, then stir uniformly at a speed of 1100 r / min, then cool to 25 DEG C, then stir uniformly at a speed of 950 r / min, to obtain titanium-aluminum composite material aqueous paint remover; wherein, the solvent includes high-boiling point composite ester DBE and tetrahydrofurfuryl alcohol, the mass ratio of high-boiling point composite ester DBE and tetrahydrofurfuryl alcohol is 1:1; the corrosion inhibitor includes seven sodium diethylene triamine penta methylene phosphonic acid and methyl benzene triazole, the mass ratio of seven sodium diethylene triamine penta methylene phosphonic acid and methyl benzene triazole is 5:5; the mass ratio of lactic acid, active agent, solvent and corrosion inhibitor is 17:7:45:5;

[0074] Titanium-aluminum composite material aqueous paint removal: add 0.3 mol / L hydrochloric acid in the cleaning tank, then add titanium-aluminum composite material, soak for 2.5 h, then wash with pure water for several times until the pH of the washing liquid is 7, then dry to obtain the cleaned titanium-aluminum composite material; add the above-mentioned titanium-aluminum composite material aqueous paint remover in the paint remover container, then add the above-mentioned cleaned titanium-aluminum composite material, then warm up to 85 DEG C, then soak for 15 min paint removal, to obtain the pre-paint removal titanium-aluminum composite material; add 1 mol / L sodium carbonate in the cleaning tank, then add the above-mentioned pre-paint removal titanium-aluminum composite material, soak for 1.5 h, then wash with pure water for several times until the pH of the washing liquid is 7, then dry to obtain the paint removal titanium-aluminum composite material.

[0075] Comparative example 5:

[0076] Preparation of titanium-aluminum composite material aqueous paint remover: add acetic acid into the solvent, then stir uniformly at a speed of 450 r / min, then warm up to 35 DEG C, then ultrasonic at a frequency of 80 kHz for 60 s, then stir at a speed of 650 r / min, then add dodecyl dimethyl benzyl ammonium cationic surfactant, then stir at a speed of 850 r / min, then add corrosion inhibitor, then stir uniformly at a speed of 1100 r / min, then cool to 25 DEG C, then stir uniformly at a speed of 950 r / min, to obtain titanium-aluminum composite material aqueous paint remover; wherein, the solvent includes high-boiling point composite ester DBE and tetrahydrofurfuryl alcohol, the mass ratio of high-boiling point composite ester DBE and tetrahydrofurfuryl alcohol is 1:1; the corrosion inhibitor includes seven sodium diethylene triamine penta methylene phosphonic acid and methyl benzene triazole, the mass ratio of seven sodium diethylene triamine penta methylene phosphonic acid and methyl benzene triazole is 5:5; the mass ratio of lactic acid, active agent, solvent and corrosion inhibitor is 17:7:45:5;

[0077] Titanium-aluminum composite material aqueous paint stripping: 0.3 mol / L hydrochloric acid was added to a cleaning tank, then the titanium-aluminum composite material was added, soaked for 2.5 h, then washed with pure water for multiple times until the pH of the washing liquid was 7, then dried to obtain the cleaned titanium-aluminum composite material; the above titanium-aluminum composite material aqueous paint stripper was added to a paint stripper container, then the above cleaned titanium-aluminum composite material was added, then heated to 85°C, then soaked for 15 min for paint stripping to obtain the pre-paint stripped titanium-aluminum composite material; 1 mol / L sodium carbonate was added to a cleaning tank, then the above pre-paint stripped titanium-aluminum composite material was added, soaked for 1.5 h, then washed with pure water for multiple times until the pH of the washing liquid was 7, then dried to obtain the paint stripped titanium-aluminum composite material.

[0078] The paint stripped titanium-aluminum composite materials obtained from Examples 1-5 and Comparative Examples 1-5 were subjected to paint stripping performance and corrosion resistance tests, and the test results are shown in Table 1.

[0079] Table 1:

[0080]

[0081]

[0082] As can be seen from Table 1, the titanium-aluminum composite material aqueous paint stripper provided by the present application has excellent paint stripping performance and corrosion resistance due to the inclusion of specific proportions of organic bases, active agents, solvents and corrosion inhibitors, and the organic bases include specific proportions of diethylenetriamine and monoethanolamine. Specifically, the use of diethylenetriamine and monoethanolamine as two organic bases to form the alkaline base system reduces the etching of the titanium-aluminum alloy substrate and enables rapid removal of masking ink. Further, the use of environmentally friendly high-boiling point composite ester (DBE) and tetrahydrofurfuryl alcohol for compounding enables the solvent to be continuously removed and evaporated during high-temperature use, and the solvent concentration continuously decreases. The solvent has a high boiling point and low odor. Further, the paint stripper system uses an organic alkaline system, so the alkaline corrosion inhibitor, i.e., diethylenetriamine pentamethylene phosphonic acid hepta sodium (DETPMP.Na7) and methyl benzotriazole (TTA) are selected to have certain alkali resistance, thereby enabling the titanium-aluminum composite material aqueous paint stripper to have good corrosion inhibition effect on the titanium-aluminum alloy in an alkaline environment at a relatively high temperature. Further, the use of dodecyl dimethyl benzyl ammonium cationic surfactant enables the ink to be continuously dissolved during use, and the nano-filling particles in the ink are adsorbed on the metal surface, which easily causes the metal surface to become hazy, white circles, white spots and other undesirable appearances. The addition of an appropriate amount of cationic active agent prevents the adsorption of nano-filling particles and solves the problem of undesirable appearance.

[0083] In the paint removal application, the higher the temperature, the faster the paint removal speed, and the easier the corrosion of the workpiece substrate, the easier the white spot and mottling phenomenon, and the higher the requirement for the corrosion inhibition of the agent. The lower the temperature, the slower the paint removal speed, the product is not easy to corrode, the lower the requirement for the corrosion inhibition of the agent, but the paint film is easy to remain and has the paint film color. Therefore, according to the actual test results, the temperature of 80-90℃ is selected.

[0084] The titanium-aluminum alloy composite material water-based paint remover of the present application can completely remove the surface shielding ink in 10-20min at 80-90℃, without corroding the titanium-aluminum composite material substrate, and has a long service life of up to 15 days, can greatly reduce the paint removal cost, the agent is safe and environmentally friendly, meets the ROHS requirement, and does not contain toxic and harmful substances.

[0085] The technical features of the above-described embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0086] The above-described embodiments only express several embodiments of the present application, the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of the patent protection of the present application should be subject to the appended claims.

Claims

1. A titanium-aluminum composite material aqueous paint remover, characterized by, It comprises organic base, active agent, solvent and corrosion inhibitor; The mass ratio of the organic base, active agent, solvent and corrosion inhibitor is 15-20:5-10:40-50:3-7; The organic base comprises diethylene triamine and monoethanolamine; The active agent is dodecyl dimethyl benzyl ammonium cationic surfactant; The solvent comprises high-boiling-point complex ester DBE and tetrahydrofurfuryl alcohol, and the mass ratio of the high-boiling-point complex ester DBE and tetrahydrofurfuryl alcohol is 1-3:1-3; The corrosion inhibitor comprises seven sodium diethylene triamine pentamethylene phosphonic acid and methyl benzotriazole, and the mass ratio of the seven sodium diethylene triamine pentamethylene phosphonic acid and methyl benzotriazole is 3-7:3-7; The mass ratio of the diethylene triamine and monoethanolamine is 3-5:1-3.

2. A method for producing a titanium-aluminum composite aqueous paint remover, characterized by, The preparation method is used for preparing the titanium-aluminum composite material aqueous paint remover as claimed in claim 1, and comprises the following steps: The organic base is added into the solvent, then stirred uniformly at a speed of 400-500 r / min, then heated to 30-40 DEG C, then ultrasonically treated, then stirred at a speed of 600-700 r / min, then the active agent is added, then stirred at a speed of 800-900 r / min, then the corrosion inhibitor is added, then stirred uniformly at a speed of 1000-1200 r / min, then cooled to 22-28 DEG C, then stirred uniformly at a speed of 900-1000 r / min, to obtain the titanium-aluminum composite material aqueous paint remover.

3. The production method according to claim 2, characterized by, The frequency of the ultrasonic treatment is 60-100 kHz, and the time of the ultrasonic treatment is 30-90 s.

4. Use of a titanium-aluminum composite aqueous paint remover, characterized in that The titanium-aluminum composite material aqueous paint removal is performed using the titanium-aluminum composite material aqueous paint remover as claimed in claim 1, and comprises the following steps: The cleaning agent is added into the cleaning tank, then the titanium-aluminum composite material is added, soaked for 2-3 h, then washed with pure water for multiple times until the pH of the washing liquid is 6.5-7.5, then dried, to obtain the cleaned titanium-aluminum composite material; The titanium-aluminum composite material aqueous paint remover is added into the paint remover container, then the cleaned titanium-aluminum composite material is added, then heated to 80-90 DEG C, then paint removal treatment is performed, to obtain the pre-paint removal titanium-aluminum composite material; The stabilizing agent is added into the cleaning tank, then the pre-paint removal titanium-aluminum composite material is added, soaked for 1.3-1.7 h, then washed with pure water for multiple times until the pH of the washing liquid is 6.5-7.5, then dried, to obtain the paint removal titanium-aluminum composite material.

5. Use according to claim 4, characterized in that, The cleaning agent is 0.1-0.5 mol / L hydrochloric acid.

6. Use according to claim 4, characterized in that, The stabilizing agent is 0.5-1.5 mol / L sodium carbonate.

7. Use according to claim 4, characterized in that, The time of the paint removal treatment is 10-20 min.

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