CN107474625B - Corrosion-free scratch-free metal paint remover and preparation method and application thereof - Google Patents
Corrosion-free scratch-free metal paint remover and preparation method and application thereof Download PDFInfo
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- CN107474625B CN107474625B CN201710746361.4A CN201710746361A CN107474625B CN 107474625 B CN107474625 B CN 107474625B CN 201710746361 A CN201710746361 A CN 201710746361A CN 107474625 B CN107474625 B CN 107474625B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D9/00—Chemical paint or ink removers
- C09D9/04—Chemical paint or ink removers with surface-active agents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D9/00—Chemical paint or ink removers
- C09D9/005—Chemical paint or ink removers containing organic solvents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D9/00—Chemical paint or ink removers
- C09D9/02—Chemical paint or ink removers with abrasives
Abstract
The invention provides a non-corrosive and non-scratch metal paint remover which is convenient to use and can effectively remove various common paint layers; the paint remover is stable, has small volatility, is harmless to human bodies when in use, does not contain attachments such as paraffin, kerosene and the like, and is convenient for secondary paint spraying; by adding the inorganic additive graphene oxide into the cleaning agent, the manual paint removal after the paint layer is expanded is facilitated, the base material cannot be scratched, and the corrosion cannot be caused; the cleaning agent is safe and environment-friendly, contains no chlorinated hydrocarbon organic solvent, has low cost, contains water, can seal the paint remover when standing, is not easy to volatilize when stored, and has good stability.
Description
Technical Field
The invention relates to a non-corrosive and non-scratch metal paint remover and a preparation method and application thereof, belonging to the technical field of paint removers.
Background
In our daily life and industrial production, the metal product has no need of decoration and protection of paint, and the coating layer, such as paint layer, has the functions of corrosion inhibition, shielding, electrochemical protection and the like, and is convenient for construction operation and good in anticorrosion effect, so that the metal product is widely used. However, in real life, under the action of environment and physical machinery, the coating often fails locally or in large area along with the prolonging of the service time, such as light loss, chalking, falling off, cracking, scratching, substrate corrosion and the like, which reduces the service life of the substrate, or unexpected defects such as orange peel, cracking, chalking and the like are inevitable in the preparation process of the coating, which causes unqualified products, and the coating is required to be thoroughly removed and then sprayed again.
At present, the method for removing paint at home and abroad mainly comprises the following steps: (1) mechanical paint removal method: the mechanical depainting is to remove the coating by mechanical friction and includes manual grinding, shot blasting, dry ice cleaning and high pressure water (abrasive) jet. Mechanical paint removing methods, such as manual polishing, mainly depend on a scraper and an iron shovel, consume a large amount of manpower and material resources and consume time, and most importantly, when paint removing is carried out, metal tools such as the scraper and the iron shovel can cause mechanical damage to a paint removing object, so that a coating is removed, and a base body is damaged. In addition, for some parts with complex geometric shapes, the mechanical paint removing method cannot remove surface coatings in all directions, and a plurality of dead angles still cannot achieve the paint removing effect; (2) a laser paint removing method: the laser cleaning technology is characterized in that high-energy laser beams are adopted to irradiate the surface of a workpiece, so that attachments or coatings on the surface of the workpiece are instantaneously evaporated or peeled off, and the process of cleaning is achieved. However, the temperature is too high in the laser paint removing process, so that the base material is easy to deform, and the metal base material with an oxide film or a phosphating film on the surface is damaged; (3) chemical paint removal: the paint remover mainly comprises acidic and alkaline paint layer cleaning agents, for example, the acidic cleaning agent is a cleaning solution consisting of concentrated sulfuric acid, hydrochloric acid and phosphoric acid, when the chemical paint remover is used, heating is needed, the paint removing efficiency is low, greater toxicity is generated in the using process, and the chemical paint remover is easy to corrode base metal; (4) an organic solvent paint removing method: the organic solvent paint remover is a common paint removing method at present, and adopts the principle of organic matter swelling, and depends on the solvent to permeate into a paint film to expand the paint film, so that the adhesive force between the paint film and a matrix is reduced, and the paint film swells and falls off from a base material. The organic solvent paint remover has high paint removing speed and thorough paint removing, so the organic solvent paint remover is favored by many manufacturers. For example, although the conventional chlorinated hydrocarbon type organic solvent can efficiently complete paint removal, the chlorinated hydrocarbon type organic solvent has the disadvantages of high toxicity, strong volatility, easy combustion, unstable chemical properties and the like, and causes great pollution to the environment.
In addition, when using a paint layer cleaning agent, the paint layer is usually coated with an organic solvent, after the paint layer expands and cracks, a manual mechanical method such as a scraper is used to remove the paint layer, and the substrate metal is inevitably scratched, so that the cracked paint layer is usually sprayed or manually wiped off by using a water gun, and then the following cleaning agent of the present inventor is used, and the composition of the cleaning agent is:
compounding a main solvent: propylene carbonate ester: butyl cellosolve =2 (1-1.5), 25-40 wt.%;
cosolvent: 5-15 wt.% of gamma-butyrolactone;
activating agent: acetic acid or propanoic acid, 9-12 wt.%;
surfactant (b): cetyl trimethyl ammonium bromide SPAN-80=1 (0.5-1), 2-3 wt.%;
abrasive particles: 0.05-1 μm silica or α -alumina particles, 3-6 wt.%;
an anti-aging agent: 2-3 wt.% of a phenolic antioxidant;
penetrant: 1-1.5 wt.% dioctyl sodium sulfosuccinate;
a thickening agent: 1.5-2 wt.% of one of hydroxymethyl cellulose or methyl cellulose or hydrated lithium magnesium silicate;
corrosion inhibitor: 0.5-0.8 wt.% of polyaspartic acid or sulfonated lignin;
deionized water: ethanol =3:1, 10-25 wt.%.
Although the frictional particles can improve the efficiency of manually removing the paint layer in the using process, the silicon oxide or the aluminum oxide has higher hardness, so when the paint layer with higher bonding force or the paint layer with thin paint layer is removed by force, the substrate is easily scratched, the appearance is influenced, and the secondary coating is seriously influenced.
Disclosure of Invention
In order to solve the problems, the invention provides the paint remover which is safe, environment-friendly, low in cost, high in paint removing efficiency, high in paint removing speed, completely free of corrosion, small in volatility, easy to remove the expanded paint layer manually at the later stage, free of scratching any base material and free of corrosion to the base material.
The technical scheme adopted by the invention is as follows: a non-corrosive and non-scratch metal paint remover comprises the following components:
main solvent: n-methylpyrrolidone: propylene carbonate =1 (0.5-2), 35-45 wt.%;
cosolvent: acetone, 5-12 wt.%;
inorganic additives: 7-30 wt.% of graphene oxide solution;
a thickening agent: 1-2 wt.% of one or more of methylcellulose, polyacrylamide, carboxymethylcellulose, hydrated lithium magnesium silicate;
penetrant: 1-2 wt.% of one or two of nonylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether;
surfactant (b): 1.5-3 wt.% of one or more of cetyltrimethylammonium bromide, polyoxyethylene sorbitan fatty acid esters, dodecyl ethoxy sulphobetaine, and the like;
the rest is a mixed solution of deionized water and ethanol, and the volume ratio is 3: 1.
The use mode is as follows: the paint remover is uniformly coated on the surface of the paint layer to be treated in a soaking or brushing mode, or the paint remover is diluted by deionized water in a certain proportion and coated on the surface of the paint layer to be treated in a spraying mode, and the paint remover can be uniformly coated or sprayed and coated for multiple times.
The paint layer is erased by wiping the expanded paint layer with spun-bonded non-woven fabric or by flushing the expanded paint layer with deionized water, and the use temperature of the paint remover is not higher than 40 DEGoAnd C, ultrasonic assistance is accompanied in the paint removing process.
The preparation method of the inorganic additive graphene oxide comprises the following steps: adding 25ml of concentrated sulfuric acid into a dry four-neck flask, and cooling to 0-2% with ice bathoC, adding 0.5g of natural crystalline flake graphite and 0.5g of NaNO into the mixture while stirring3And slowly adding 3g of KMnO4Granulating, placing the flask in constant temperature water bath at about 35 deg.C, stirring for 4 hr when the temperature of the reaction solution rises to about 35 deg.C, slowly adding 46ml deionized water into the solution, and adding into 98 ℃oStirring for 20min at C, reacting at high temperature, adding 170ml deionized water and 5ml H2O2(30wt.%) reacting for 90min, washing the obtained solution with deionized water for several times to neutrality, pre-freezing the solution for 24 hr, and cooling at-50 deg.C and vacuum degree lower than 5 PaoAnd C, freeze-drying for 48 hours under the condition of C to obtain the foam type graphene oxide with good water solubility.
The non-corrosive and scratch-free metal paint remover can be used for polyurethane, epoxy resin, alkyd resin, polysiloxane and plastic paint layers, and the coating thickness is 30-200 microns.
The preparation method of the non-corrosive and non-scratch metal paint remover comprises the following steps: slightly heating the deionized water to 40-50%oC, slowly adding a thickening agent, stirring for 20min at a speed of 200-300 r/min to completely dissolve the thickening agent, then sequentially adding graphene oxide and a surfactant, and continuously stirring to obtain the graphene oxide/surfactant compositeAnd cooling until a uniform brown yellow solution is obtained, sequentially adding a main solvent, a cosolvent, a penetrating agent and ethanol, sealing the reactor, and continuously stirring at normal temperature for 2-4 hours to obtain the non-corrosive and non-scratch metal paint remover.
Advantageous effects
The invention can achieve the following beneficial technical effects:
(1) the paint remover is convenient and simple to use, and can effectively remove various common paint layers;
(2) the paint has no damage such as corrosion to a base material, has small volatility, has no damage to a human body when in use, does not contain attachments such as paraffin, kerosene and the like, and is convenient for secondary paint spraying;
(3) the inorganic additive is added, so that the efficiency of erasing the paint layer can be improved, and the base material cannot be scratched;
(4) the paint remover is safe and environment-friendly, does not contain chlorinated hydrocarbon type organic solvent, and has lower cost;
(5) the paint remover has no corrosion to the metal base material.
Drawings
FIG. 1 is a schematic view of scratching a substrate when an inorganic additive added to a paint remover is silicon oxide;
FIG. 2 is a schematic view showing that when graphene oxide is added to a paint remover, the substrate is not scratched.
Detailed Description
Comparative example 1
A metal paint remover comprises the following components:
compounding a main solvent: propylene carbonate ester: butyl cellosolve =2:1.24, 33 wt.%;
cosolvent: γ -butyrolactone, 10 wt.%;
activating agent: propanoic acid, 10 wt.%;
surfactant (b): cetyl trimethylammonium bromide: SPAN-80=1:0.75, 2.5 wt.%;
abrasive particles: 0.05-1 μ ι η α -alumina particles, 10 wt.%;
an anti-aging agent: phenolic antioxidant, 2.5 wt.%;
penetrant: dioctyl sodium sulfosuccinate, 1.25 wt.%;
a thickening agent: methylcellulose, 1.75 wt.%;
corrosion inhibitor: sulfonated lignin, 0.7 wt.%;
the remainder was a mixture of deionized water and ethanol (3: 1 by volume) and labeled comparative example 1.
Comparative example 2
A metal paint remover comprises the following components:
main solvent: n-methylpyrrolidone: propylene carbonate =1:0.5, 45 wt.%;
cosolvent: acetone, 7 wt.%;
inorganic additives: 15wt.% silica inorganic particles;
a thickening agent: one or more of methylcellulose, polyacrylamide, carboxymethylcellulose, hydrated lithium magnesium silicate, 1.3 wt.%;
penetrant: 1.7wt.% of one or two of nonylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether;
surfactant (b): one or more of cetyltrimethylammonium bromide, polyoxyethylene sorbitan fatty acid esters, dodecylethoxy sulphobetaine, 2.3 wt.%;
the remainder was a mixture of deionized water and ethanol at a volume ratio of 3:1, labeled comparative example 2.
Example 1
Examples 1-9 provide a non-corrosive, non-scratching metallic paint stripper, which is prepared by a method comprising the steps of: slightly heating the deionized water to 40-50%oAnd C, slowly adding a thickening agent, stirring for 20min at a speed of 200-300 r/min to completely dissolve the thickening agent, sequentially adding graphene oxide and a surfactant, continuously stirring until a uniform brown yellow solution is obtained, cooling, sequentially adding a main solvent, a cosolvent, a penetrating agent and ethanol, sealing the reactor, and continuously stirring for 2-4 h at normal temperature to obtain the non-corrosive and non-scratch metal paint remover. The preparation method of the inorganic additive graphene oxide comprises the following steps: adding 25ml of concentrated sulfuric acid into a dry four-neck flask, and cooling to 0-2% with ice bathoC, adding 0.5g of natural crystalline flake graphite and 0.5g of Na while stirringNO3And slowly adding 3g of KMnO4Granulating, placing the flask in constant temperature water bath at about 35 deg.C, stirring for 4 hr when the temperature of the reaction solution rises to about 35 deg.C, slowly adding 46ml deionized water into the solution, and adding into 98 ℃oStirring for 20min at C, adding 170ml deionized water and 5ml H after high temperature reaction2O2(30wt.%) reacting for 90min, washing the obtained solution with deionized water for several times to neutrality, pre-freezing the solution for 24 hr, and cooling at-50 deg.C and vacuum degree lower than 5 PaoAnd C, freeze-drying for 48 hours under the condition of C to obtain the foam type graphene oxide with good water solubility.
A non-corrosive and non-scratching metal stripper (the sample obtained is marked sample No. 1) consisting of:
main solvent: n-methylpyrrolidone: propylene carbonate =1:0.5, 35 wt.%;
cosolvent: acetone, 5wt.%;
inorganic additives: 7wt.% graphene oxide solution;
a thickening agent: one or more of methylcellulose, polyacrylamide, carboxymethylcellulose, hydrated lithium magnesium silicate, 1 wt.%;
penetrant: 1wt.% of one or two of nonylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether;
surfactant (b): 1.5wt.% of one or more of cetyltrimethylammonium bromide, polyoxyethylene sorbitan fatty acid esters, dodecylethoxy sulphobetaine;
the rest is a mixed solution of deionized water and ethanol, and the volume ratio is 3: 1.
Example 2
A non-corrosive and non-scratch metal paint remover comprises the following components:
main solvent: n-methylpyrrolidone: propylene carbonate =1: 1.5, 40wt.%;
cosolvent: acetone, 8.5 wt.%;
inorganic additives: 20wt.% graphene oxide solution;
a thickening agent: one or more of methylcellulose, polyacrylamide, carboxymethylcellulose, hydrated lithium magnesium silicate, 1.5wt.%;
penetrant: 1.5wt.% of one or two of nonylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether;
surfactant (b): one or more of cetyltrimethylammonium bromide, polyoxyethylene sorbitan fatty acid esters, dodecylethoxy sulphobetaine, 2wt.%;
the remainder was a mixture of deionized water and ethanol at a volume ratio of 3:1, labeled sample No. 2.
Example 3
A non-corrosive and non-scratch metal paint remover comprises the following components:
main solvent: n-methylpyrrolidone: propylene carbonate =1: 2, 45 wt.%;
cosolvent: acetone, 12wt.%;
inorganic additives: graphene oxide solution 30 wt.%;
a thickening agent: one or more of methylcellulose, polyacrylamide, carboxymethylcellulose, hydrated lithium magnesium silicate, 2wt.%;
penetrant: 2wt.% of one or two of nonylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether;
surfactant (b): one or more of cetyltrimethylammonium bromide, polyoxyethylene sorbitan fatty acid esters, dodecylethoxy sulphobetaine, 3wt.%;
the remainder was a mixture of deionized water and ethanol at a volume ratio of 3:1, labeled sample No. 3.
Example 4
A non-corrosive and non-scratch metal paint remover comprises the following components:
main solvent: n-methylpyrrolidone: propylene carbonate =1:0.5, 45 wt.%;
cosolvent: acetone, 7 wt.%;
inorganic additives: 7wt.% graphene oxide solution;
a thickening agent: one or more of methylcellulose, polyacrylamide, carboxymethylcellulose, hydrated lithium magnesium silicate, 1.3 wt.%;
penetrant: 1.7wt.% of one or two of nonylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether;
surfactant (b): one or more of cetyltrimethylammonium bromide, polyoxyethylene sorbitan fatty acid esters, dodecylethoxy sulphobetaine, 2.3 wt.%;
the remainder was a mixture of deionized water and ethanol at a volume ratio of 3:1, labeled sample No. 4.
Example 5
A non-corrosive and non-scratch metal paint remover comprises the following components:
main solvent: n-methylpyrrolidone: propylene carbonate =1:0.5, 45 wt.%;
cosolvent: acetone, 7 wt.%;
inorganic additives: 10wt.% graphene oxide solution;
a thickening agent: one or more of methylcellulose, polyacrylamide, carboxymethylcellulose, hydrated lithium magnesium silicate, 1.3 wt.%;
penetrant: 1.7wt.% of one or two of nonylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether;
surfactant (b): one or more of cetyltrimethylammonium bromide, polyoxyethylene sorbitan fatty acid esters, dodecylethoxy sulphobetaine, 2.3 wt.%;
the remainder was a mixture of deionized water and ethanol at a volume ratio of 3:1, labeled sample No. 5.
Example 6
A non-corrosive and non-scratch metal paint remover comprises the following components:
main solvent: n-methylpyrrolidone: propylene carbonate =1:0.5, 45 wt.%;
cosolvent: acetone, 7 wt.%;
inorganic additives: 15wt.% graphene oxide solution;
a thickening agent: one or more of methylcellulose, polyacrylamide, carboxymethylcellulose, hydrated lithium magnesium silicate, 1.3 wt.%;
penetrant: 1.7wt.% of one or two of nonylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether;
surfactant (b): one or more of cetyltrimethylammonium bromide, polyoxyethylene sorbitan fatty acid esters, dodecylethoxy sulphobetaine, 2.3 wt.%;
the remainder was a mixture of deionized water and ethanol at a volume ratio of 3:1, labeled sample No. 6.
Example 7
A non-corrosive and non-scratch metal paint remover comprises the following components:
main solvent: n-methylpyrrolidone: propylene carbonate =1:0.5, 45 wt.%;
cosolvent: acetone, 7 wt.%;
inorganic additives: 20wt.% graphene oxide solution;
a thickening agent: one or more of methylcellulose, polyacrylamide, carboxymethylcellulose, hydrated lithium magnesium silicate, 1.3 wt.%;
penetrant: 1.7wt.% of one or two of nonylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether;
surfactant (b): one or more of cetyltrimethylammonium bromide, polyoxyethylene sorbitan fatty acid esters, dodecylethoxy sulphobetaine, 2.3 wt.%;
the remainder was a mixture of deionized water and ethanol at a volume ratio of 3:1, labeled sample No. 7.
Example 8
A non-corrosive and non-scratch metal paint remover comprises the following components:
main solvent: n-methylpyrrolidone: propylene carbonate =1:0.5, 45 wt.%;
cosolvent: acetone, 7 wt.%;
inorganic additives: 25wt.% graphene oxide solution;
a thickening agent: one or more of methylcellulose, polyacrylamide, carboxymethylcellulose, hydrated lithium magnesium silicate, 1.3 wt.%;
penetrant: 1.7wt.% of one or two of nonylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether;
surfactant (b): one or more of cetyltrimethylammonium bromide, polyoxyethylene sorbitan fatty acid esters, dodecylethoxy sulphobetaine, 2.3 wt.%;
the remainder was a mixture of deionized water and ethanol at a volume ratio of 3:1, labeled sample No. 8.
Example 9
A non-corrosive and non-scratch metal paint remover comprises the following components:
main solvent: n-methylpyrrolidone: propylene carbonate =1:0.5, 45 wt.%;
cosolvent: acetone, 7 wt.%;
inorganic additives: graphene oxide solution 30 wt.%;
a thickening agent: one or more of methylcellulose, polyacrylamide, carboxymethylcellulose, hydrated lithium magnesium silicate, 1.3 wt.%;
penetrant: 1.7wt.% of one or two of nonylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether;
surfactant (b): one or more of cetyltrimethylammonium bromide, polyoxyethylene sorbitan fatty acid esters, dodecylethoxy sulphobetaine, 2.3 wt.%;
the remainder was a mixture of deionized water and ethanol at a volume ratio of 3:1, labeled sample No. 9.
And (3) corrosion test: taking an iron sheet and an aluminum alloy as test base materials, mechanically polishing the base materials in advance, washing the base materials for multiple times by acetone-ethanol-deionized water, drying the base materials by an air cooler, and weighing the base materials to obtain m0Then the sample is placed in a paint-removing layer cleaning solution, 25oC, soaking for 24 hours, then washing with deionized water, and sequentially washing with acetone-ethanol-deionized water to obtain m1. Calculation formula V = (m)0-m1) Where V is the corrosion rate of the metal, mg/cm2；m0And m1The weight of the sample before and after washing is mg, A is the surface area cm of the sample2。
And (3) testing paint removal efficiency: taking a polysiloxane paint layer as a sample, wherein the thickness of the polysiloxane paint layer is 70-80 mu m, the temperature is normal temperature, and the time of the wrinkling part for the first time and the complete wrinkling time (seconds/s) are calculated by using a stopwatch.
The paint remover disclosed by the invention has the advantages that the corrosion test of the paint remover on iron sheets and aluminum alloys and the paint removing efficiency test of the paint remover on polysiloxane paint layers show that the paint remover disclosed by the invention has basically zero corrosion on metal substrates, the wrinkling and complete wrinkling time of various common paint layers is shorter and is far higher than that of similar paint removers in the market.
TABLE 1 Corrosion, paint removal efficiency, scratch testing of paint removers on iron sheets, aluminum alloys
The embodiments of the present invention have been described in detail, but the embodiments are merely examples, and the present invention is not limited to the embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.
Claims (5)
1. A preparation method of a non-corrosive and non-scratch metal paint remover is characterized by comprising the following steps: slightly heating the deionized water to 40-50%oC, slowly adding a thickening agent, stirring for 20min at a speed of 200-300 r/min to completely dissolve the thickening agent, sequentially adding a graphene oxide solution and a surfactant, continuously stirring until a uniform brown yellow solution is obtained, cooling, and then connectingSequentially adding a main solvent, a cosolvent, a penetrating agent and ethanol, sealing the reactor, and continuously stirring at normal temperature for 2-4 hours to obtain a non-corrosive and non-scratch metal paint remover;
the paint remover comprises
Main solvent: n-methylpyrrolidone: propylene carbonate =1 (0.5-2), 35-45 wt.%;
cosolvent: 5-12 wt.% acetone;
inorganic additives: 7-30 wt.% of graphene oxide solution;
a thickening agent: 1-2 wt.% of one or more of methylcellulose, polyacrylamide, carboxymethylcellulose, hydrated lithium magnesium silicate;
penetrant: 1-2 wt.% of one or two of nonylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether;
surfactant (b): 1.5-3 wt.% of one or more of cetyl trimethyl ammonium bromide, polyoxyethylene sorbitan fatty acid esters, and dodecyl ethoxy sulfobetaine;
the rest is a mixed solution of deionized water and ethanol, and the volume ratio is 3: 1.
2. The preparation method of the non-corrosive and non-scratch metal paint remover as claimed in claim 1, wherein the step of preparing the inorganic additive graphene oxide comprises the following steps: adding 25mL of concentrated sulfuric acid into a dry four-neck flask, and cooling to 0-2% with ice bathoC, adding 0.5g of natural crystalline flake graphite and 0.5g of NaNO into the mixture while stirring3And slowly adding 3g of KMnO4The granules were then placed in a 35 ℃ constant temperature water bath and stirred for 4 hours as the temperature of the reaction increased to 35 ℃ and 46mL of deionized water was slowly added to the solution at 98 ℃oStirring for 20min under the condition of C, adding 170mL of deionized water and 5mL of 30wt.% H after high-temperature reaction2O2Reacting for 90min, washing the obtained solution with deionized water for many times to neutrality, pre-freezing the solution for 24h, and keeping the vacuum degree below 5 Pa and the cold trap temperature at-50 deg.CoAnd C, freeze-drying for 48 hours under the condition of C to obtain the foam type graphene oxide with good water solubility.
3. The method for preparing the metal paint remover without corrosion and scratch according to claim 1, which is characterized in that the paint remover is uniformly coated on the surface of a paint layer to be treated by using a soaking or brushing mode; or the paint remover is diluted by deionized water in a certain proportion, and the paint remover is coated on the surface of the paint layer to be treated in a spraying or showering mode.
4. The method for preparing a metal paint remover without corrosion and scratch according to claim 1, wherein the paint remover is used at a temperature not higher than 40 ℃, and is accompanied by ultrasonic assistance in the paint removing process.
5. The application of the metal paint remover prepared by the preparation method of the corrosion-free scratch-free metal paint remover as claimed in claim 1, wherein the paint remover is used for a polyurethane, epoxy resin, alkyd resin or polysiloxane paint layer with the thickness of 30-200 microns.
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| CN101323723A (en) * | 2008-07-25 | 2008-12-17 | 东南大学 | Environment-friendly type aqueous paint remover for removing polysiloxane paint |
| CN101684213A (en) * | 2009-07-31 | 2010-03-31 | 南京师范大学 | Multifunctional chorine-free and benzene-free compound paint stripper and production method thereof |
| CN102888141A (en) * | 2012-09-24 | 2013-01-23 | 中国人民解放军第五七一九工厂 | Paint remover for removing epoxy primer and polyurethane finish coating |
| CN105174381A (en) * | 2015-09-21 | 2015-12-23 | 清华大学 | Method for making Ti-graphene electrode through oxidized graphene in assistive mode |
| CN105251993A (en) * | 2015-09-21 | 2016-01-20 | 清华大学 | Method for preparing Fe-graphene particles with assistance of graphene oxide |
| CN106147366A (en) * | 2016-08-23 | 2016-11-23 | 启东市欣德龙制衣有限公司 | A kind of environment-friendly water-based paint stripper |
| CN106590142A (en) * | 2016-12-29 | 2017-04-26 | 义乌市中科院兰州化物所功能材料中心 | Water-based paint remover applied to zipper production and preparation method thereof |
-
2017
- 2017-08-26 CN CN201710746361.4A patent/CN107474625B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323723A (en) * | 2008-07-25 | 2008-12-17 | 东南大学 | Environment-friendly type aqueous paint remover for removing polysiloxane paint |
| CN101684213A (en) * | 2009-07-31 | 2010-03-31 | 南京师范大学 | Multifunctional chorine-free and benzene-free compound paint stripper and production method thereof |
| CN102888141A (en) * | 2012-09-24 | 2013-01-23 | 中国人民解放军第五七一九工厂 | Paint remover for removing epoxy primer and polyurethane finish coating |
| CN105174381A (en) * | 2015-09-21 | 2015-12-23 | 清华大学 | Method for making Ti-graphene electrode through oxidized graphene in assistive mode |
| CN105251993A (en) * | 2015-09-21 | 2016-01-20 | 清华大学 | Method for preparing Fe-graphene particles with assistance of graphene oxide |
| CN106147366A (en) * | 2016-08-23 | 2016-11-23 | 启东市欣德龙制衣有限公司 | A kind of environment-friendly water-based paint stripper |
| CN106590142A (en) * | 2016-12-29 | 2017-04-26 | 义乌市中科院兰州化物所功能材料中心 | Water-based paint remover applied to zipper production and preparation method thereof |
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