White board cleaning agent

Abstract

According to the white board cleaning agent, propylene glycol butyl ether is adopted as a main component of a solvent, the solubility parameter of the propylene glycol butyl ether is highly matched with the polarity of white board ink resin, butyl hydrophobic chains in propylene glycol butyl ether molecules can be embedded into an ink resin network, the acting force between resin molecules can be weakened, and therefore the white board can be cleaned; therefore, the white board pen ink is swelled and is easy to peel off, so that the cleaning capability of the cleaning agent is improved; the propylene glycol butyl ether is matched with the specific surfactant, so that a coating on the surface of the white board is not damaged on the basis of effectively dissolving the ink; the components of the cleaning agent are green and environment-friendly, do not volatilize, and are relatively friendly to human bodies and the environment.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning agents, in particular to a whiteboard cleaning agent. Background Art

[0002] Whiteboards are a reusable writing tool widely used in education, office, and commercial settings. The surface cleaning effect directly affects the user experience and lifespan. Traditional whiteboard cleaning technology has the following limitations:

[0003] (1) The resin component in whiteboard pen ink is easily cured and cross-linked in the air to form a hydrophobic film. Commercially available water-based cleaners mostly use a single surfactant, which lacks the ability to directional swelling of the resin and has poor cleaning ability for long-term handwriting.

[0004] (2) Early cleaning agents mostly relied on alcohols (such as ethanol and isopropyl alcohol) or ketone organic solvents, which can quickly dissolve ink components, but the release of volatile organic compounds (VOCs) is as high as 30-50% (GB 38508-2020 test), and long-term exposure can easily cause respiratory irritation;

[0005] (3) Some strong alkaline or acidic cleaners remove handwriting through chemical corrosion, but long-term use will cause the whiteboard coating to corrode, which can easily lead to writing residue and reduce the reflectivity;

[0006] (4) Existing environmentally friendly cleaning agents mostly use low-toxic surfactants such as alkyl polyglycosides (APGs). However, in order to improve the detergency, they are often compounded with difficult-to-degrade chelating agents such as EDTA, which leads to excessive COD (>500 mg / L) and increases the burden on sewage treatment.

[0007] Therefore, for current whiteboard cleaners, further improvement remains to be made. Summary of the Invention

[0008] The first technical problem to be solved by the present invention is to provide a whiteboard cleaner that can swell the ink so as to facilitate peeling and improve the cleaning ability in view of the current status of the existing technology.

[0009] The first technical problem to be solved by the present invention is to provide a whiteboard cleaner which can reduce corrosion and damage to whiteboards and is harmless to human body and environment in view of the current status of the existing technology.

[0010] The technical solution adopted by the present invention to solve at least one of the above technical problems is:

[0011] A whiteboard cleaner comprising the following components by weight:

[0012] Solvent 0.1-20%,

[0013] Surfactant 0.1-5%,

[0014] pH adjuster 0.01-5%,

[0015] Preservatives 0.01-1%,

[0016] Deionized water balance;

[0017] Wherein, the solvent is selected from propylene glycol methyl ether, propylene glycol butyl ether, dipropylene glycol methyl ether, dipropylene glycol ethyl ether, and dipropylene glycol butyl ether.

[0018] Preferably, the solvent is propylene glycol butyl ether. The present invention uses propylene glycol butyl ether as the main solvent component. The solubility parameters of propylene glycol butyl ether are highly compatible with the polarity of the whiteboard ink resin. The butyl hydrophobic chains in the propylene glycol butyl ether molecules can embed into the ink resin network, weakening the intermolecular forces between the resin molecules, thereby causing the whiteboard marker ink to swell and be more easily peeled off.

[0019] As an improvement, the solvent is a mixture of propylene glycol butyl ether and dipropylene glycol methyl ether. When dipropylene glycol methyl ether and propylene glycol butyl ether are mixed, the high water solubility of dipropylene glycol methyl ether may act as a co-solvent. Dipropylene glycol methyl ether can help propylene glycol butyl ether to dissolve or disperse better in water by forming hydrogen bonds or other intermolecular forces, thereby enhancing the stability and uniformity of the overall formulation. During use, the cleaning agent is in full contact with the ink, further improving the cleaning effect.

[0020] Preferably, the weight ratio of the propylene glycol butyl ether and dipropylene glycol methyl ether is 1: 1~3: 1. In the aqueous solution, dipropylene glycol methyl ether, as an amphipathic cosolvent, forms hydrogen bond (hydrophilic end) with water by ether bond, while its propylene glycol chain and the butoxy group of propylene glycol butyl ether produce interaction (hydrophobic end), reduce the interfacial tension of propylene glycol butyl ether, make the propylene glycol butyl ether stable dispersion that hydrophobicity is stronger increase. Within the scope of this, the synergistic effect of propylene glycol butyl ether and dipropylene glycol methyl ether is the strongest, and excessive dipropylene glycol methyl ether may cause system polarity to be too strong, but is unfavorable for propylene glycol butyl ether to dissolve.

[0021] Preferably, the surfactant is a linear fatty alcohol polyoxyethylene ether or a branched fatty alcohol polyoxyethylene ether. The molecular structure of fatty alcohol polyoxyethylene ether is composed of a fatty alcohol (hydrophobic group) and a polyoxyethylene chain (hydrophilic group). Its hydrophilic and lipophilic balance is easy to control and adjust, making the fatty alcohol polyoxyethylene ether compatible with the hydrophobic components in whiteboard ink and able to combine with the aqueous phase system to form a stable and uniformly mixed system.

[0022] More preferably, the EO of the surfactant is between 6 and 9. Adjusting the number of ethylene oxide (EO) can adjust the hydrophilic and lipophilic balance of the surfactant, effectively improving the wetting and penetration properties of the detergent. The present invention sets the EO between 6 and 9. The branched structure (isomeric tridecanol) with a medium to low EO number can reduce surface tension and quickly penetrate the interface of whiteboard marker ink (resin / grease). At the same time, the hydrophobic group has an affinity for the ink, and the hydrophilic chain has an affinity for the water phase, forming a stable emulsion that can effectively prevent secondary adhesion of stains, further improving the cleaning effect.

[0023] Preferably, the linear fatty alcohol polyoxyethylene ether is selected from isomeric decanol polyoxyethylene ether, isomeric undecanol polyoxyethylene ether, and isomeric tridecanol polyoxyethylene ether.

[0024] Preferably, the branched fatty alcohol polyoxyethylene ether is selected from lauryl alcohol polyoxyethylene ether, undecanol polyoxyethylene ether, stearyl alcohol polyoxyethylene ether, and palmityl alcohol polyoxyethylene ether.

[0025] Compared with the prior art, the advantages of the present invention are: the present invention adopts propylene glycol butyl ether as the main component of the solvent, the solubility parameter of propylene glycol butyl ether is highly consistent with the polarity of the whiteboard ink resin, the butyl hydrophobic chain in the propylene glycol butyl ether molecule can be embedded in the ink resin network, weakening the interaction force between the resin molecules, thereby causing the whiteboard pen ink to swell and be more easily peeled off, thereby improving the cleaning ability of the detergent; the propylene glycol butyl ether in the present invention is combined with a specific surfactant to effectively dissolve the ink without damaging the whiteboard surface coating; and the various components of the detergent of the present invention are green and environmentally friendly, not easy to volatilize, and relatively friendly to the human body and the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a diagram showing the cleaning effect of the cleaning agent according to an embodiment of the present invention on whiteboard pen ink that has been left for a long time;

[0027] Figure 2 This is a diagram showing the wiping effects of the cleaning agents with different ratios according to the present invention;

[0028] Figure 3 The figure shows the dissolution effect of whiteboard pen ink by the cleaning agents of the present invention in different proportions. DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0030] Example 1:

[0031] According to the weight components, the whiteboard cleaner of this embodiment includes: 82.4 parts of deionized water, 10 parts of propylene glycol butyl ether, 5 parts of dipropylene glycol methyl ether, 1 part of isomeric tridecyl alcohol polyoxyethylene ether, EO value of 7, 1 part of lauryl alcohol polyoxyethylene ether, EO value of 8, 0.5 parts of sodium bicarbonate, and 0.1 parts of methylisothiazolinone.

[0032] The preparation method of the whiteboard cleaner of this embodiment is as follows:

[0033] (1) adding weighed propylene glycol isotridecyl polyoxyethylene ether, lauryl alcohol polyoxyethylene ether, sodium bicarbonate, and methylisothiazolinone to deionized water in sequence, and mixing uniformly to obtain a mixed solution 1;

[0034] (2) mixing propylene glycol butyl ether with an appropriate amount of deionized water to form a mixed solution 2;

[0035] (3) Add the mixed solution 2 to the mixed solution 1 in batches and mix them evenly to obtain a whiteboard cleaner.

[0036] Example 2:

[0037] According to the weight components, the whiteboard cleaner of this embodiment includes: 81.4 parts of deionized water, 8 parts of propylene glycol butyl ether, 8 parts of dipropylene glycol methyl ether, 1 part of isomeric tridecyl alcohol polyoxyethylene ether with an EO value of 7, 1 part of lauryl alcohol polyoxyethylene ether with an EO value of 8, 0.5 parts of sodium bicarbonate, and 0.1 parts of methylisothiazolinone.

[0038] The preparation method of the whiteboard cleaner of this embodiment is as follows:

[0039] (1) adding weighed propylene glycol isotridecyl polyoxyethylene ether, lauryl alcohol polyoxyethylene ether, sodium bicarbonate, and methylisothiazolinone to deionized water in sequence, and mixing uniformly to obtain a mixed solution 1;

[0040] (2) mixing propylene glycol butyl ether, dipropylene glycol methyl ether and an appropriate amount of deionized water to form a mixed solution 2;

[0041] (3) Add the mixed solution 2 to the mixed solution 1 in batches and mix them evenly to obtain a whiteboard cleaner.

[0042] Example 3:

[0043] According to the weight components, the whiteboard cleaner of this embodiment includes: 88.4 parts of deionized water, 6 parts of propylene glycol butyl ether, 3 parts of dipropylene glycol methyl ether, 1 part of isomeric tridecyl alcohol polyoxyethylene ether, EO value of 6, 1 part of lauryl alcohol polyoxyethylene ether, EO value of 6, 0.5 part of sodium bicarbonate, and 0.1 part of methylisothiazolinone.

[0044] The preparation method of the whiteboard cleaner of this embodiment is as follows:

[0045] (1) adding weighed propylene glycol isotridecyl polyoxyethylene ether, lauryl alcohol polyoxyethylene ether, sodium bicarbonate, and methylisothiazolinone to deionized water in sequence, and mixing uniformly to obtain a mixed solution 1;

[0046] (2) mixing propylene glycol butyl ether, dipropylene glycol methyl ether and an appropriate amount of deionized water to form a mixed solution 2;

[0047] (3) Add the mixed solution 2 to the mixed solution 1 in batches and mix them evenly to obtain a whiteboard cleaner.

[0048] Comparative Example 1:

[0049] According to the weight components, the whiteboard cleaner of this comparative example includes: 89.4 parts of deionized water, 8 parts of propylene glycol butyl ether, 1 part of isomeric tridecyl alcohol polyoxyethylene ether with an EO value of 7, 1 part of lauryl alcohol polyoxyethylene ether with an EO value of 8, 0.5 parts of sodium bicarbonate, and 0.1 parts of methylisothiazolinone.

[0050] The preparation method of the whiteboard cleaning agent of this comparative example is as follows:

[0051] (1) adding weighed propylene glycol isotridecyl polyoxyethylene ether, lauryl alcohol polyoxyethylene ether, sodium bicarbonate, and methylisothiazolinone to deionized water in sequence, and mixing uniformly to obtain a mixed solution 1;

[0052] (2) mixing propylene glycol butyl ether with an appropriate amount of deionized water to form a mixed solution 2;

[0053] (3) Add the mixed solution 2 to the mixed solution 1 in batches and mix them evenly to obtain a whiteboard cleaner.

[0054] Comparative Example 2:

[0055] According to the weight components, the whiteboard cleaner of this comparative example includes: 85.4 parts of deionized water, 8 parts of propylene glycol butyl ether, 4 parts of dipropylene glycol methyl ether, 1 part of isomeric tridecyl alcohol polyoxyethylene ether with an EO value of 4, 1 part of lauryl alcohol polyoxyethylene ether with an EO value of 4, 0.5 parts of sodium bicarbonate, and 0.1 parts of methylisothiazolinone.

[0056] The preparation method of the whiteboard cleaning agent of this comparative example is as follows:

[0057] (1) adding weighed propylene glycol isotridecyl polyoxyethylene ether, lauryl alcohol polyoxyethylene ether, sodium bicarbonate, and methylisothiazolinone to deionized water in sequence, and mixing uniformly to obtain a mixed solution 1;

[0058] (2) mixing propylene glycol butyl ether with an appropriate amount of deionized water to form a mixed solution 2;

[0059] (3) Add the mixed solution 2 to the mixed solution 1 in batches and mix them evenly to obtain a whiteboard cleaner.

[0060] The performance tests were performed on the cleaning agents prepared in the above embodiments and comparative examples.

[0061] Attachment Figure 1 The markings of different brands of markers on a whiteboard that had been left there for 30 days were wiped with a blackboard eraser and a cloth using the formula of Example 1, and the effects of wiping with and without a detergent were compared. Figure 1 It can be seen that the present invention has an obvious cleaning effect on whiteboard pen ink that has been left for a long time. Using a cloth to wipe it can better absorb the dissolved ink and achieve a more excellent cleaning effect.

[0062] Attachment Figure 2 The wiping effect of detergents with different ratios. Figure 2 As can be seen, using a suitable ratio of propylene glycol butyl ether and dipropylene glycol methyl ether as solvents has a significant cleaning effect on whiteboard pen ink. Examples 1 and 2 have the best cleaning effects. Example 3 has a lower solvent ratio and poor ink solubility, so the cleaning effect is slightly weaker. Comparative Example 1 has the worst cleaning effect. Comparative Example 1 uses only propylene glycol butyl ether as the solvent. Propylene glycol butyl ether has a strong solubility for non-polar substances, but is less effective for polar resins or water-based stains. Therefore, the formula of Comparative Example 1 is insufficient for cleaning mixed stains (ink + dust) that have been left for a long time.

[0063] Attachment Figure 3 This is a demonstration of the dissolving effect of whiteboard pen ink by detergents with different ratios. Figure 3 As can be seen, Examples 1 and 2 both use surfactants with EO values ​​of 7 and 8, which have suitable amphiphilic properties and are therefore able to effectively dissolve the ink with minimal residue. Comparative Example 2, on the other hand, uses a surfactant with a lower EO value, which is more lipophilic and therefore effectively dissolves the ink, but it also has a higher risk of residue, making it more likely to leave an oil film or streaks on the board surface, requiring multiple wipes to remove the residue.

Claims

1. A whiteboard cleaner, characterized in that: Calculated by weight percentage, it includes the following components Wherein, the solvent is selected from propylene glycol methyl ether, propylene glycol butyl ether, dipropylene glycol methyl ether, dipropylene glycol ethyl ether, and dipropylene glycol butyl ether.

2. The whiteboard cleaner according to claim 1, characterized in that: The solvent is propylene glycol butyl ether.

3. The whiteboard cleaner according to claim 1, characterized in that: The solvent is a mixture of propylene glycol butyl ether and dipropylene glycol methyl ether.

4. The whiteboard cleaner according to claim 3, characterized in that: The weight ratio or volume ratio of the propylene glycol butyl ether to the dipropylene glycol methyl ether is 1:1 to 3:

1.

5. The whiteboard cleaner according to any one of claims 1 to 4, characterized in that: The surfactant is a linear fatty alcohol polyoxyethylene ether or a branched fatty alcohol polyoxyethylene ether.

6. The whiteboard cleaner according to claim 5, characterized in that: The EO of the surfactant is between 6-9.

7. The whiteboard cleaner according to claim 5, characterized in that: The linear fatty alcohol polyoxyethylene ether is selected from isomeric decanol polyoxyethylene ether, isomeric undecanol polyoxyethylene ether, and isomeric tridecanol polyoxyethylene ether.

8. The whiteboard cleaner according to claim 5, characterized in that: The branched fatty alcohol polyoxyethylene ether is selected from lauryl alcohol polyoxyethylene ether, undecanol polyoxyethylene ether, octadecanol polyoxyethylene ether, and palmityl alcohol polyoxyethylene ether.

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