CN106519787A - Corrosion-inhibition environment-friendly water-based paint remover and preparation method thereof - Google Patents

Abstract

The invention discloses a corrosion-inhibition environment-friendly water-based paint remover which is prepared from the following raw materials in parts by weight: 1.2-1.4 parts of nano montmorillonite, 1.5-2 parts of penetrant T, 42-46 parts of benzyl alcohol, 11-12 parts of acetone, 10-11 parts of hydrogen peroxide, 3-3.5 parts of methyl cellulose, 2-2.4 parts of urotropine, 1.3-1.5 parts of dodecyl benzene sulfonate, 1.6-1.9 parts of microporous starch, 2.2-2.5 parts of microcrystalline wax, 0.8-1 part of tetrabutyl titanate, a right amount of ammonia water, a right amount of ethanol, 50-55 parts of water, 1-1.3 parts of tetrasodium ethylenediamine tetraacetate, 3-4 parts of nitromethane and 1-2 parts of dimethyl benzoxazole. The nitromethane can accelerate the dissolution of the paint and enhance the depainting speed; the tetrasodium ethylenediamine tetraacetate is combined to complex the dispersed and dissolved paint and metal ions to enhance the depainting effect; and the dimethyl benzoxazole can prevent metal corrosion.

Description

Environment-friendly aqueous paint stripper of a kind of inhibition and preparation method thereof

Technical field

The present invention relates to paint stripper technical field, more particularly to a kind of environment-friendly aqueous paint stripper of inhibition and its preparation Method.

Background technology

Traditional chloralkane is aided with the paint stripper high poison high pollution of benzene class, although the paint on matrix efficiently can be removed Film, but the injury at the same time causing to environment and operator is huge.A kind of new, low stain can be developed in recent years Environmentally-friepaint paint remover be people study hotspot.《The progress of environmentally friendly paint stripper》One text simply describe it is de- On the basis of the operation principle and species of paint agent, emphasis elaborates the formula composition of environmentally friendly paint stripper, has looked forward to future The development trend of paint stripper.

It is main component that chlorohydrocarbon type and high poison, high volatile organic solvent are used mostly in traditional paint stripper, although Efficiently but also pollute environment.Therefore from environmental angle, one is prepared herein by single factor experiment and orthogonal test Plant low toxicity, low-volatile emulsion-type paint stripper.The paint stripper is molten as master using 1-Methyl-2-Pyrrolidone and essence of Niobe Agent, 1,4- butyrolactone and benzyl alcohol are as cosolvent, acetic acid as activator, cetyl trimethylammonium bromide as emulsifying Agent, appropriate deionized water is equipped with again makes.It is found through experiments, when main solvent 1-Methyl-2-Pyrrolidone and benzoic acid first The mass ratio of ester is 1：1, while cosolvent gamma-butyrolacton is 2 with the mass ratio of benzyl alcohol：When 1, the paint stripper is rich for epoxy Zinc, acrylic modified alkyd, fluorine carbon, acroleic acid polyurethane these four conventional organic coatings are attained by good paint removing effect. Obtained paint stripper is the light oyster white solution of clarification, and the proportion of solution is 1.05g/cm³Left and right, pH between 2-3, flash-point For 82 DEG C.On resulting paint stripper optimization formula basis, obtained by fixing other components change one-component contents The preferable amount ranges of each component in paint stripper：When main solvent consumption is 35-55%；Cosolvent consumption is 10-25%；Activator Consumption is 6-12%；When dosage of surfactant is 1-3%, paint stripper shows preferable paint removing effect.Found by studying, temperature Degree, stir speed (S.S.) and coating layer thickness can produce certain impact to paint removal efficiency.In the 0-75 DEG C of temperature range studied, When temperature is higher, paint stripping rate is relatively fast, but the evaporation rate of solvent can also be accelerated；And at ambient temperature, paint stripper Can equally have comparatively faster depainting speed.Studied without stirring, stirring at low speed (300r/min) and high-speed stirred (1200r/min), under three kinds of states, whether stir and the change of speed affects little to depainting speed.30 for being studied ± 5 μm are arrived in the range of coat thicknesses of 130+5, and with the increase of coating layer thickness, depainting speed slows down gradually；But the paint stripper At short notice four kinds of coatings that thickness is 130 μm can be taken off.By study find, when from methylcellulose as thickening When agent is added in paint stripper, paint stripper can preferably meet the demand of various execution conditions and performance is more stable.Institute In the 1-4% methylcellulose content ranges of research, when its content is 3%, the properties of paint stripper are more superior；Paint stripper Stability strengthen with the increase of Methyl cellulose cellulose content.Volatility, recycling and corrosivity to paint stripper is entered Find after row research：At 0 DEG C for being studied, 25 DEG C and 45 DEG C of three temperature, in half an hour, quality retains percentage to paint stripper Number is all more than 99%.Cyclic utilization rate is very high, can reuse.Full leaching experimental result finds paint stripper to carbon steel, copper alloy It is relatively low with the corrosivity of aluminium alloy.《A kind of New Emulsion type paint stripper》One text describes the concrete preparation of emulsion paint stripper Method, has obtained the more excellent paint stripper of performance, but paint removing effect is with oiliness paint stripper, and still there is a big difference, still can go out Existing organic solvent volatilizees to environment, needs to improve, in addition it is also necessary to improve the corrosion inhibition of paint stripper.

The content of the invention

The object of the invention is exactly for the defect for making up prior art, there is provided a kind of environment-friendly aqueous paint stripper of inhibition And preparation method thereof.

The present invention is achieved by the following technical solutions：

A kind of environment-friendly aqueous paint stripper of inhibition, is prepared by the raw materials in：Nano imvite 1.2-1.4, ooze Thoroughly agent T1.5-2, benzyl alcohol 42-46, acetone 11-12, hydrogen peroxide 10-11, methylcellulose 3-3.5, hexamethylenamine 2-2.4, Dodecyl benzene sulfonate 1.3-1.5, micropore starch 1.6-1.9, microwax 2.2-2.5, butyl titanate 0.8-1, ammonia are fitted Amount, appropriate amount of ethanol, water 50-55, tetrasodium ethylenediamine tetraacetate 1-1.3, nitromethane 3-4, dimethylbiphenyl oxazole 1-2.

The preparation method of the environment-friendly aqueous paint stripper of the inhibition, comprises the following steps：

（1）By butyl titanate：Ethanol volume ratio is 1:20-25 mixes, and stirring obtains butyl titanate ethanol solution, by nanometer Montmorillonite, penetrant t mixing, add the deionized water of 5-6 weight portions to stir, and are stirred continuously lower instillation butyl titanate second In alcoholic solution, 1.5-1.8h is stirred under the conditions of 250-300r/min, obtain mixture, then ammonia is slowly added dropwise into above-mentioned In mixture, adjustment pH value is 9-9.5, is obtaining emulsion at 30-35 DEG C after stirring reaction 3-3.5h；

（2）Microwax is heated to into fusing, acetone under continuous stirring, is slowly added to, 30-40 minutes are stirred, micropore shallow lake is added Powder, is uniformly mixing to obtain mixed material；

（3）By step（1）Emulsion and step（2）Mixed material mix homogeneously, be heated to 56-60 DEG C, stirring 20-25 point Clock, then mix homogeneously with other residual componentss, obtain final product.

It is an advantage of the invention that：The present invention prepares emulsion using butyl titanate, nano imvite, can strengthen paint stripper Stability, adsorptivity, non-oxidizability, improve depainting film seriality, reduce hazardous solvent volatilization, in object after depainting Surface forms protecting film, slows down corrosion of the paint stripper to body surface；By using micropore starch, excellent adsorption, good dispersion, There is certain compatibility with water and oil, mix with microwax, prevent from condensing under microwax low temperature, affect spray painting performance, improve The film property of microwax, reduces the volatilization of hazardous solvent, improves paint removing effect, degradable；By using nitromethane, Neng Gourong Solution accelerates paint dissolving, improves paint stripping rate, with the use of tetrasodium ethylenediamine tetraacetate, the paint and metal of complexation dispersing and dissolving Ion, improves paint removing effect, and dimethylbiphenyl oxazole is prevented from metal erosion.

Specific embodiment

The environment-friendly aqueous paint stripper of a kind of inhibition, by following weight portion（Kilogram）Raw material make：Nano imvite 1.2nd, penetrant t 1.5, benzyl alcohol 42, acetone 11, hydrogen peroxide 10, methylcellulose 3, hexamethylenamine 2, detergent alkylate sulphur Hydrochlorate 1.3, micropore starch 1.6, microwax 2.2, butyl titanate 0.8, appropriate ammonia, appropriate amount of ethanol, water 50, ethylenediamine tetrem Sour four sodium 1, nitromethane 3, dimethylbiphenyl oxazole 1.

The preparation method of the environment-friendly aqueous paint stripper of the inhibition, comprises the following steps：

（1）By butyl titanate：Ethanol volume ratio is 1:20 mixing, stirring obtain butyl titanate ethanol solution, nanometer are covered De- soil, penetrant t mixing, add the deionized water of 5 weight portions to stir, and are stirred continuously lower instillation butyl titanate ethanol molten In liquid, 1.5h is stirred under the conditions of 250r/min, obtain mixture, then ammonia is slowly added dropwise in said mixture, adjusted Whole pH value is 9, is obtaining emulsion at 30 DEG C after stirring reaction 3h；

（2）Microwax is heated to into fusing, acetone under continuous stirring, is slowly added to, is stirred 30 minutes, is added micropore starch, stir Mix；

（3）By step（1）Emulsion and step（2）Mixed material mix homogeneously, be heated to 56 DEG C, stir 20 minutes, then with Other residual componentss mix homogeneously, obtain final product.

Experimental data：

The paint stripper of the embodiment causes 99.2% corrugation of epoxy coating area at 25 DEG C, in 10min, and paint stripper is deposited There is no lamination within one week, the volatile quantity of paint stripper is 0.07g in the half-hour period interval at 25 DEG C.

Claims (2)

1. the environment-friendly aqueous paint stripper of a kind of inhibition, it is characterised in that be prepared by the raw materials in：Nanometer is covered de- Native 1.2-1.4, penetrant t 1.5-2, benzyl alcohol 42-46, acetone 11-12, hydrogen peroxide 10-11, methylcellulose 3-3.5, crow Lip river tropine 2-2.4, dodecyl benzene sulfonate 1.3-1.5, micropore starch 1.6-1.9, microwax 2.2-2.5, butyl titanate 0.8-1, appropriate ammonia, appropriate amount of ethanol, water 50-55, tetrasodium ethylenediamine tetraacetate 1-1.3, nitromethane 3-4, dimethylbiphenyl Oxazole 1-2.

2. the preparation method of the environment-friendly aqueous paint stripper of inhibition according to claim 1, it is characterised in that including following Step：

（1）By butyl titanate：Ethanol volume ratio is 1:20-25 mixes, and stirring obtains butyl titanate ethanol solution, by nanometer Montmorillonite, penetrant t mixing, add the deionized water of 5-6 weight portions to stir, and are stirred continuously lower instillation butyl titanate second In alcoholic solution, 1.5-1.8h is stirred under the conditions of 250-300r/min, obtain mixture, then ammonia is slowly added dropwise into above-mentioned In mixture, adjustment pH value is 9-9.5, is obtaining emulsion at 30-35 DEG C after stirring reaction 3-3.5h；

（2）Microwax is heated to into fusing, acetone under continuous stirring, is slowly added to, 30-40 minutes are stirred, micropore shallow lake is added Powder, is uniformly mixing to obtain mixed material；

（3）By step（1）Emulsion and step（2）Mixed material mix homogeneously, be heated to 56-60 DEG C, stirring 20-25 point Clock, then mix homogeneously with other residual componentss, obtain final product.