Paint removing composition, paint stain cleaning agent and application of paint stain cleaning agent

Abstract

The invention relates to the technical field of paint removers, and particularly discloses a paint removal composition, a paint stain cleaning agent and application of the paint stain cleaning agent. The paint stain cleaning agent provided by the invention is prepared from the following components in parts by weight: 30 to 40 parts of EDTA-2Na (Ethylene Diamine Tetraacetic Acid), 200 to 300 parts of caustic soda flakes, 140 to 170 parts of sodium alcohol ether sulphate, 160 to 180 parts of sodium xylene sulfonate, 400 to 450 parts of monoethanolamine, 1100 to 1300 parts of diethylene glycol monobutyl ether, 250 to 300 parts of limonene, 40 to 100 parts of saponin extract and 3700 to 3900 parts of water, the saponin extract is selected from one or more of soapnut saponin, fenugreek saponin and aescin; the invention further provides a paint stain cleaning agent prepared from the paint removal composition and application of the paint stain cleaning agent to cleaning of protective clothing. The paint stain cleaning agent provided by the invention can quickly permeate into paint and the contact surface of the paint and protective clothing, so that the paint on the surface of the protective clothing is dissolved and effectively stripped.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of paint removers, in particular to a paint removal composition, a paint stain cleaning agent and application thereof. BACKGROUND

[0002] Fabric paint removers have a wide range of applications in industry and daily life, especially in the field of cleaning and maintenance of protective clothing. With the improvement of environmental awareness and the increasing demand for safety in the working environment, the market demands high-efficiency and environmentally friendly paint removers. Traditional paint removers mainly rely on strong corrosive chemicals or organic solvents. Although these products can meet certain paint removal needs, their chemical composition is complex, causing great burden to the environment and potential harm to human health.

[0003] Currently, to solve the problem of removing the coating on the surface of fabric, the industry generally uses the following technical means: first, using traditional paint removers based on strong alkaline substances (such as sodium hydroxide) to remove the coating through strong corrosion; second, using organic solvents (such as toluene and dichloromethane) to dissolve the coating to achieve paint removal effect; third, combining physical methods (such as mechanical polishing or high-temperature heating) to assist chemical reagents to complete the paint removal process. However, the above methods still have certain limitations, such as complex chemical composition, poor environmental protection, limited paint removal effect in low-temperature environments, etc. Especially when dealing with special fabrics such as protective clothing in winter low-temperature environment, it is difficult to meet the requirements of environmental protection and high-efficiency paint removal performance.

[0004] Therefore, it is urgent to develop a new type of paint removal composition to overcome the shortcomings of the prior art and meet the market demand for environmentally friendly and efficient paint removers. SUMMARY

[0005] In order to overcome the problem that the existing paint removers cannot simultaneously meet the requirements of environmental protection performance and low-temperature high-efficiency paint removal performance, the present application provides a paint removal composition, a paint stain cleaning agent and application thereof.

[0006] In a first aspect, the present application provides a paint removal composition, which adopts the following technical solution: A paint removal composition, comprising the following components by weight: EDTA-2Na 30-40 parts, flake caustic 200-300 parts, fatty alcohol polyoxyethylene ether sodium sulfate 140-170 parts, sodium xylene sulfonate 160-180 parts, monoethanolamine 400-450 parts, diethylene glycol butyl ether 1100-1300 parts, limonene 250-300 parts, saponin extract 40-100 parts, and water 3700-3900 parts. The saponin extract is selected from one or more of soapnut saponin, trigonella foenum-graecum saponin and aescine.

[0007] The application provides a paint removal composition. The paint removal composition is prepared by using the above components and controlling the addition amount of each component within the above range. The paint removal agent can not only achieve efficient paint removal of fabrics such as protective clothing, but also has good environmental protection characteristics, and can meet the market demand for environmentally friendly and efficient paint removal agents. Specifically, EDTA-2Na as a chelating agent can effectively complex metal ions and promote the decomposition of paint stains. The tablet alkali can provide an alkaline environment and enhance the paint removal ability. Sodium fatty alcohol polyoxyethylene ether sulfate as a surfactant can help penetrate and emulsify paint stains. Sodium xylene sulfonate as a cosolvent can improve the solubility of each component and promote the uniform mixing of each component. Monoethanolamine further adjusts the pH value and enhances the paint removal performance. Diethylene glycol butyl ether as a solvent can dissolve organic components in paint stains. Limonene has natural solubility and can effectively remove stubborn paint stains. The saponin extract is derived from natural plants and consists of aglycone and sugar groups. It has high amphoteric affinity, is environmentally friendly, and has auxiliary emulsification and dispersion effects, which can greatly improve the paint removal efficiency.

[0008] Optionally, the paint removal composition includes the following components in parts by weight: EDTA-2Na 30-40 parts, tablet alkali 200-300 parts, sodium fatty alcohol polyoxyethylene ether sulfate 140-170 parts, sodium xylene sulfonate 160-180 parts, monoethanolamine 400-450 parts, diethylene glycol butyl ether 1100-1300 parts, limonene 250-300 parts, saponin extract 50-80 parts, and water 3700-3900 parts.

[0009] In some embodiments, the saponin extract can be in a weight of 40-50 parts, 40-65 parts, 45-80 parts, 50-65 parts, 50-80 parts, 50-100 parts, 65-80 parts, 65-100 parts, or 80-100 parts.

[0010] In a specific embodiment, the saponin extract can be in a weight of 40 parts, 50 parts, 65 parts, 80 parts, or 100 parts.

[0011] Optionally, the paint removal composition includes the following components in parts by weight: EDTA-2Na 30 parts, tablet alkali 255 parts, sodium fatty alcohol polyoxyethylene ether sulfate 150 parts, sodium xylene sulfonate 168 parts, monoethanolamine 420 parts, diethylene glycol butyl ether 1200 parts, limonene 280 parts, saponin extract 65 parts, and water 3800 parts.

[0012] Optionally, the saponin extract is a mixture of aescine and trigonellin.

[0013] In the present application, the soap suds of soapberry mainly exist in the pericarp of soapberry, which can significantly reduce the surface tension of liquid, and can be adsorbed on the interface of paint through the "amphiphilic" structure, promoting the dispersion and peeling of paint. The soap suds of fenugreek are derived from the seeds of fenugreek, which can reduce the surface tension of liquid, increase the penetration of solvent to paint, and thus promote the swelling and peeling of paint. The present application further uses a mixture of soap suds of soapberry and soap suds of fenugreek as a saponin extract, and interacts and cooperates with other substances, thereby realizing the efficient decomposition and peeling of paint through surface activity and emulsification.

[0014] Optionally, the weight ratio of the soap suds of soapberry and the soap suds of fenugreek is 1: (0.1-0.4).

[0015] In some embodiments, the weight ratio of the soap suds of soapberry and the soap suds of fenugreek can be 1: (0.1-0.2), 1: (0.1-0.3), 1: (0.2-0.3), 1: (0.2-0.4) or 1: (0.3-0.4).

[0016] In a specific embodiment, the weight ratio of the soap suds of soapberry and the soap suds of fenugreek can also be 1:0.1, 1:0.2, 1:0.3 or 1:0.4.

[0017] Optionally, the weight ratio of the soap suds of soapberry and the soap suds of fenugreek is 1: (0.2-0.3).

[0018] Optionally, the paint removal composition further comprises 0.05-0.1 parts of pigment.

[0019] In a second aspect, the present application provides a paint stain cleaning agent prepared from the paint removal composition.

[0020] In a third aspect, the present application provides the use of the paint stain cleaning agent in the cleaning of protective clothing.

[0021] Optionally, the cleaning of protective clothing comprises the following steps: first, diluting the paint stain cleaning agent with water to 2-3 times; then soaking the protective clothing in it for 20-30 min; finally, taking out the protective clothing and then performing subsequent conventional cleaning.

[0022] In summary, the present application has the following beneficial effects: 1. The present application provides a paint removal composition, which is prepared by mixing the components in a certain ratio. The paint stain cleaning agent prepared therefrom has good stability and low-temperature high-efficiency paint removal performance. In addition, the components in the paint removal composition provided by the present application are all environmentally friendly components, which effectively avoids the use of traditional strong corrosive chemicals or harmful organic solvents, reduces the potential harm to human health and the environment, and significantly improves the environmental performance of the paint stain cleaning agent.

[0023] 2. The paint stain cleaning agent provided by the present application uses saponin extract, which can penetrate and peel off the paint on the surface of the fabric together with other components through surface activity and emulsification, thereby achieving a significant cleaning effect on the paint on the surface of special fabrics such as protective clothing.

[0024] 3. The paint stain cleaning agent provided by the present application can also exhibit excellent paint removal effect at low temperature of 0-10℃, and can remove more than 80% of the paint on the surface of special fabrics such as protective clothing.

[0025] 4. The paint stain cleaning agent prepared by further using a mixture of soapberry saponin and fenugreek saponin as saponin extract has better paint removal effect, and even at low temperature of 5℃, the removal efficiency of the paint on the surface of protective clothing can reach 95% or more, which can meet the requirements of rapid and efficient cleaning of special fabrics such as protective clothing under low temperature conditions in winter. DETAILED DESCRIPTION

[0026] The present application provides a paint removal composition, which comprises the following components in parts by weight: EDTA-2Na 30-40 parts, caustic soda 200-300 parts, fatty alcohol polyoxyethylene ether sodium sulfate 140-170 parts, sodium xylene sulfonate 160-180 parts, monoethanolamine 400-450 parts, diethylene glycol butyl ether 1100-1300 parts, limonene 250-300 parts, saponin extract 40-100 parts, pigment 0.05-0.1 parts, and water 3700-3900 parts; further, the paint removal composition comprises the following components in parts by weight: EDTA-2Na 30-40 parts, caustic soda 200-300 parts, fatty alcohol polyoxyethylene ether sodium sulfate 140-170 parts, sodium xylene sulfonate 160-180 parts, monoethanolamine 400-450 parts, diethylene glycol butyl ether 1100-1300 parts, limonene 250-300 parts, saponin extract 50-80 parts, pigment 0.05-0.1 parts, and water 3700-3900 parts.

[0027] The saponin extract is selected from one or more of soapberry saponin, fenugreek saponin and aescine; further, the weight ratio of soapberry saponin and fenugreek saponin is 1: (0.1-0.4); and further, the weight ratio of soapberry saponin and fenugreek saponin is 1: (0.2-0.3).

[0028] The present application also provides a paint stain cleaning agent prepared by using the paint removal composition.

[0029] The present application also provides the application of the paint stain cleaning agent in the cleaning of protective clothing, which comprises the following steps: first, diluting the paint stain cleaning agent with water to 2-3 times; then, soaking the protective clothing in the paint stain cleaning agent for 20-30 min; and finally, taking out the protective clothing and then performing subsequent conventional cleaning.

[0030] In the embodiments of the present application, sapindoside, 70%, was purchased from Xi'an Zebang Biological Technology Co., Ltd.; Trigonella foenum-graecum saponin, 50%, was purchased from Shaanxi Xintianyu Biological Technology Co., Ltd.; Escin, ≥95%, was purchased from Merck; the raw materials, reagents, solvents and the like used in the present application can be commercially available.

[0031] The present application will be further described in detail in combination with the following examples and performance detection tests. Example 1

[0032] Example 1 provides a paint stain cleaning agent.

[0033] The preparation method of the above paint stain cleaning agent comprises the following steps: first, 3800g of water is added EDTA-2Na 30g, flake soda 255g, sodium xylene sulfonate 168g, stirring for 30min to completely dissolve; then add diethylene glycol butyl ether 1200g, monoethanolamine 420g, stirring for 20min to completely dissolve; then add fatty alcohol polyoxyethylene ether sodium sulfate 150g, stirring for 20min to completely dissolve; finally add sapindoside 65g, limonene 280g and pigment 0.06g, continue to stir for 30min to uniform transparent, obtain paint stain cleaning agent. Example 2

[0034] Example 2 provides a paint stain cleaning agent.

[0035] The preparation method of the above paint stain cleaning agent comprises the following steps: first, 3800g of water is added EDTA-2Na 40g, flake soda 200g, sodium xylene sulfonate 170g, stirring for 30min to completely dissolve; then add diethylene glycol butyl ether 1300g, monoethanolamine 400g, stirring for 20min to completely dissolve; then add fatty alcohol polyoxyethylene ether sodium sulfate 170g, stirring for 20min to completely dissolve; finally add sapindoside 65g, limonene 280g and pigment 0.06g, continue to stir for 30min to uniform transparent, obtain paint stain cleaning agent. Example 3

[0036] Example 3 provides a paint stain cleaning agent.

[0037] The preparation method of the paint stain cleaning agent comprises the following steps: firstly, 3800g of water is added with EDTA-2Na 30g, flake soda 300g, and sodium xylene sulfonate 180g, and stirred for 30min until completely dissolved; then, diethylene glycol butyl ether 1100g and monoethanolamine 450g are added, and stirred for 20min until completely dissolved; then, sodium fatty alcohol polyoxyethylene ether sulfate 140g is added, and stirred for 20min until completely dissolved; finally, soapberry saponin 65g, limonene 280g, and pigment 0.06g are added, and continue to stir for 30min until uniform and transparent, to obtain the paint stain cleaning agent. Examples 4-7

[0038] Examples 4-7 respectively provide a paint stain cleaning agent.

[0039] The above examples are different from Example 1 in that the addition amount of the saponin extract, and the specific differences are shown in Table 1 below.

[0040] Table 1: Addition amount of saponin extract in paint stain cleaning agent of Example 1, Examples 4-7 Examples 8-15

[0041] Examples 8-15 respectively provide a paint stain cleaning agent.

[0042] The above examples are different from Example 1 in that the type and ratio of the saponin extract, and the specific differences are shown in Table 2 below.

[0043] Table 2: Type and ratio of saponin extract in Example 1, Examples 8-15 Comparative Example 1

[0044] Comparative Example 1 provides a paint stain cleaning agent.

[0045] The above comparative example is different from Example 1 in that the addition amount of soapberry saponin in the paint stain cleaning agent is 0. Comparative Example 2

[0046] Comparative Example 2 provides a paint stain cleaning agent.

[0047] The above comparative example is different from Example 1 in that the soapberry saponin is replaced by smilax saponin. Comparative Example 3

[0048] Comparative Example 3 provides a paint stain cleaning agent.

[0049] The preparation method of the paint stain cleaning agent is as follows: 20 g of solid sodium metasilicate pentahydrate is added to 730 g of water and stirred to completely dissolve; then 30 g of JFC-2, 20 g of SP-90 and 20 g of AEO-3PK are added and stirred to completely dissolve; finally, 30 g of D-limonene, 120 g of propylene glycol butyl ether and 30 g of isopropyl alcohol are added and stirred uniformly to obtain the paint stain cleaning agent. Performance detection test

[0050] The physical and chemical properties and use performance of the paint stain cleaning agents obtained in Examples 1-15 and Comparative Examples 1-3 are detected, and the results are shown in Table 3.

[0051] (1) Stability: each paint stain cleaning agent is placed in a 45°C constant temperature box for 60 days, and whether there are phenomena such as precipitation, stratification and turbidity is observed.

[0052] (2) Paint removal effect detection: ① a plurality of anti-static clothing stains with the same size and surface uniformly sprayed with equal amount of epoxy resin paint are prepared, and each has an area of 30 cm x 50 cm; ② each paint stain cleaning agent is diluted to 2 times with 5°C water and 25°C water respectively (the paint stain cleaning agent provided in Comparative Example 3 does not need to be diluted); ③ one anti-static clothing stain is soaked in each paint stain cleaning agent diluent, soaked for 30 min, taken out, and then put into a washing machine for regular cleaning. After drying, the removal rate of the paint on the surface of the anti-static clothing stain is observed, and the softness is checked by hand feeling.

[0053] Table 3 Paint removal effect of the paint stain cleaning agents obtained in Examples 1-15 and Comparative Examples 1-3

[0054] According to the detection results in Table 3, the paint stain cleaning agents prepared in Examples 1-15 have no phenomena such as precipitation, stratification and turbidity after being stored at 45°C for 60 days; after the anti-static clothing stains with paint on the surface are soaked and cleaned by using the above paint stain cleaning agents, the removal rate of the paint on the surface of the anti-static clothing stain is 82-100%; while the paint stain cleaning agents prepared by not using saponin extract or using smilax saponin as saponin extract in Comparative Examples 1-2 have a removal rate of the paint on the surface of the anti-static clothing stain of 60-80% after the anti-static clothing stains with paint on the surface are soaked and cleaned, especially the removal rate at low temperature is only 60-68%; the paint stain cleaning agent prepared in Comparative Example 3 has a removal rate of the paint on the surface of the anti-static clothing stain of 91% at 25°C, but the removal rate of the paint on the surface of the anti-static clothing stain at low temperature of 5°C is only 74% after the anti-static clothing stains with paint on the surface are soaked and cleaned. Therefore, it is proved that the paint stain cleaning agent prepared by using one or more of aucubin, trigonella saponin and escin as the saponin extract component has good stability, and also has good paint removal effect on the surface of the protective clothing at low temperature.

[0055] The detection results of Examples 1, 4-7 show that, with the increase of the amount of saponin extract, the removal rate of paint on the surface of protective clothing of the obtained paint stain cleaning agent shows a trend of first increasing and then decreasing; wherein the paint stain cleaning agent obtained in Examples 1, 5-6 has a paint removal rate of 91-94% (≥90%) on the surface of the anti-static clothing stained cloth at 25°C, and a paint removal rate of 87-90% (≥85%) on the surface of the anti-static clothing stained cloth at 5°C; while the paint stain cleaning agent obtained in Examples 4, 7 has a paint removal rate of only 87-88% (<90%) on the surface of the anti-static clothing stained cloth at 25°C, and a paint removal rate of only 82-84% (<85%) on the surface of the anti-static clothing stained cloth at 5°C. Therefore, it is indicated that the further control of the amount of saponin extract in the range of 13-20 parts in the application can make the paint removal effect of the prepared paint stain cleaning agent better.

[0056] The detection results of Examples 1, 8-15 show that the paint stain cleaning agent obtained in Examples 1, 8-9 has a paint removal rate of 86-94% on the surface of the anti-static clothing stained cloth at 25°C, and a paint removal rate of 84-90% on the surface of the anti-static clothing stained cloth at 5°C; the paint stain cleaning agent obtained in Examples 14-15 has a paint removal rate of 94-95% on the surface of the anti-static clothing stained cloth at 25°C, and a paint removal rate of 91% on the surface of the anti-static clothing stained cloth at 5°C; while the paint stain cleaning agent obtained in Examples 10-13 has a paint removal rate of 96-100% (≥95%) on the surface of the anti-static clothing stained cloth at 25°C, and a paint removal rate of 95-99% (≥95%) on the surface of the anti-static clothing stained cloth at 5°C. Therefore, it is indicated that the further use of the mixture of aescine and trigonellin as the saponin extract in the application can make the paint removal effect of the prepared paint stain cleaning agent better, that is, even under the low temperature condition of 5°C, the paint removal efficiency on the surface of protective clothing can reach more than 95%, which can meet the requirements of rapid and efficient cleaning of special fabrics such as protective clothing under the low temperature condition of winter.

[0057] Although the present application has been described in detail by the general description and specific embodiments above, some modifications or improvements can be made on the basis of the present application, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the present application, all belong to the scope of protection claimed by the present application.

Claims

1. A paint removal composition characterized in that, The paint remover composition comprises the following components by weight: EDTA-2Na 30-40 parts, caustic soda 200-300 parts, sodium fatty alcohol polyoxyethylene ether sulfate 140-170 parts, sodium xylene sulfonate 160-180 parts, monoethanolamine 400-450 parts, diethylene glycol butyl ether 1100-1300 parts, limonene 250-300 parts, saponin extract 50-80 parts, and water 3700-3900 parts. The saponin extract is selected from one or more of soapnut saponin, corchorus saponin, and aescine.

2. The paint removal composition according to claim 1, characterized by, The paint remover composition comprises the following components by weight: EDTA-2Na 30-40 parts, caustic soda 200-300 parts, sodium fatty alcohol polyoxyethylene ether sulfate 140-170 parts, sodium xylene sulfonate 160-180 parts, monoethanolamine 400-450 parts, diethylene glycol butyl ether 1100-1300 parts, limonene 250-300 parts, saponin extract 50-80 parts, and water 3700-3900 parts.

3. The paint removal composition according to claim 1, characterized in that, The paint remover composition comprises the following components by weight: EDTA-2Na 30 parts, caustic soda 255 parts, sodium fatty alcohol polyoxyethylene ether sulfate 150 parts, sodium xylene sulfonate 168 parts, monoethanolamine 420 parts, diethylene glycol butyl ether 1200 parts, limonene 280 parts, saponin extract 65 parts, and water 3800 parts.

4. The paint removal composition according to claim 1, characterized in that, The saponin extract is a mixture of soapnut saponin and corchorus saponin.

5. The paint removal composition according to claim 1, wherein The weight ratio of the soapnut saponin and the corchorus saponin is 1: (0.1-0.4).

6. The paint removal composition according to claim 1, wherein The weight ratio of the soapnut saponin and the corchorus saponin is 1: (0.2-0.3).

7. The paint removal composition according to claim 1, wherein The paint remover composition further comprises pigment 0.05-0.1 parts.

8. A lacquer-removing cleaning agent, characterized by Prepared by using the paint remover composition of any one of claims 1-7.

9. Use of the paint remover of claim 8 in cleaning of protective clothing.

10. Use according to claim 9, characterized in that, The cleaning of the protective clothing comprises the following steps: firstly diluting the paint remover with water to 2-3 times; then soaking the protective clothing therein for 20-30 min; and finally taking out the protective clothing for subsequent normal cleaning. The cleaning of the protective clothing comprises the following steps: firstly diluting the paint remover with water to 2-3 times; then soaking the protective clothing therein for 20-30 min; and finally taking out the protective clothing for subsequent normal cleaning.

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