Color-changing foam cleaning agent and preparation method thereof

Abstract

The invention discloses a color-changing foam cleaning agent and a preparation method thereof. The color-changing foam cleaning agent comprises the following raw materials in parts by mass: 5-10 parts of a nonionic surfactant, 5-10 parts of a penetrant, 1-5 parts of a cosolvent, 0.2-1 part of a corrosion inhibitor, 60-70 parts of deionized water, 0.08-2 parts of an acid-base indicator, 10-20 parts of a propellant, 5-10 parts of a pH regulator and 0.1-0.5 part of essence. The cleaning agent disclosed by the invention can foam automatically, the stain removal condition can be prompted through the color change of the cleaning agent in the use process, and the cleaning progress and effect can be intuitively displayed.

Description

Technical Field

[0001] The invention relates to the field of detergents, and in particular to a color-changing foam detergent and a preparation method thereof. Background Art

[0002] During the use of detergent, the contact area and contact time between the detergent and the stain are important factors affecting the cleaning effect. In actual use, some users rinse off the foam before the detergent and the stain have fully reacted, resulting in poor cleaning effect and waste of detergent.

[0003] For example, the Chinese invention with publication number CN117625319A discloses a low-irritation solvent-free kitchen oil stain cleaner, which includes 8.5% to 17% surfactant, 1.53% to 7% corrosion inhibitor, and the balance is water by mass fraction; wherein the surfactant is a composition of a nonionic surfactant and an amphoteric surfactant, and the nonionic surfactant includes a combination of fatty alcohol polyoxyethylene ether and isomerized fatty alcohol polyoxyethylene ether. The above-mentioned cleaner may have the following problems: since oil stains are stubborn stains, if the contact time between the cleaner and the oil stains is short, the oil stains are difficult to remove; and since the above-mentioned cleaner does not have a component for auxiliary surfactant foaming, in order to increase the contact area between the cleaner and the oil stains, the user needs to foam it during use, making the cleaning process cumbersome.

[0004] In view of this, the present invention provides a color-changing foam cleaner and a preparation method thereof to solve the above problems. Summary of the invention

[0005] In order to overcome the deficiencies of the above-mentioned technologies, the present invention provides a color-changing foam cleaner that can foam by itself and can indicate the removal status of stains through the color change of the cleaner during use, and can intuitively display the cleaning progress and effect.

[0006] To achieve the above-mentioned purpose, the present invention provides a color-changing foam cleanser, comprising the following raw materials in parts by weight: 5 to 10 parts of non-ionic surfactant, 5 to 10 parts of penetrant, 1 to 5 parts of co-solvent, 0.2 to 1 part of corrosion inhibitor, 60 to 70 parts of deionized water, 0.08 to 2 parts of acid-base indicator, 10 to 20 parts of propellant, 5 to 10 parts of pH adjuster, and 0.1 to 0.5 parts of flavor.

[0007] Preferably, the nonionic surfactant is one or more of fatty alcohol polyoxyethylene ether, carbonyl alcohol polyoxyethylene ether, isomeric alcohol polyoxyethylene ether, fatty amine polyoxyethylene ether, fatty acid diethanolamide, APG, amine oxide, and fatty acid methyl ester ethoxylate.

[0008] Preferably, the EO number of the fatty alcohol polyoxyethylene ether, carbonyl alcohol polyoxyethylene ether, isomeric alcohol polyoxyethylene ether and fatty amine polyoxyethylene ether is in the range of 2-15.

[0009] Preferably, the penetrant is one or more of ethanol, ethylene glycol, polyethylene glycol, propylene glycol, isopropanol, glycerol, sorbitol, diethylene glycol, and dipropylene glycol.

[0010] Preferably, the cosolvent is one or more of ethylene glycol butyl ether, ethylene glycol tert-butyl ether, propylene glycol butyl ether, diethylene glycol methyl ether, diethylene glycol ethyl ether, diethylene glycol butyl ether, diethylene glycol dimethyl ether, diethylene glycol hexyl ether, dipropylene glycol methyl ether, dipropylene glycol methyl ether acetate, dipropylene glycol butyl ether acetate, dipropylene glycol butyl ether, triethylene glycol methyl ether, triethylene glycol ethyl ether, tripropylene glycol butyl ether, ethylene glycol phenyl ether, and propylene glycol propyl ether.

[0011] Preferably, the corrosion inhibitor is one or more of sodium benzoate, sodium nitrite, triethanolamine, kasone, and phenacylglycerol.

[0012] Preferably, the acid-base indicator is one or more of thymol blue, thymolphthalein, alizarin yellow R, phenolphthalein, phenol red, dardan yellow, peacock blue, alizarin red S, cresol red, neutral red, and bromothymol blue.

[0013] Preferably, the propellant is liquefied petroleum gas.

[0014] Preferably, the pH adjuster is one or more of citric acid, sodium citrate, sodium metasilicate, and sodium hydroxide; the pH adjuster is used to adjust the pH value of the color-changing foam cleanser to 8-9.5.

[0015] To achieve the above object, the present invention further provides a method for preparing a color-changing foam cleaning agent, comprising the following steps:

[0016] Step 1: Add the corrosion inhibitor and pH adjuster into deionized water, stir and dissolve; then add the acid-base indicator, stir and dissolve to obtain liquid A;

[0017] Step 2: Stir and mix the nonionic surfactant, penetrant, cosolvent and flavor to obtain liquid B;

[0018] Step 3: Add liquid A to liquid B, stir and mix to obtain a feed liquid;

[0019] Step 4: Pour the liquid into the spray can, seal the valve, and finally fill the propellant into the spray can.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The detergent of the present invention penetrates the stain and reacts with the stain, which causes the pH value of the detergent to change, resulting in a change in the color of the acid-base indicator of the detergent, thereby intuitively indicating that the stain has been cleaned, thereby avoiding the user rinsing off the foam before the detergent and the stain have fully reacted, thereby resulting in poor cleaning effect and waste of detergent.

[0022] 2. The propellant of the present invention can spray the detergent from the spray can in the form of aerosol, and the non-ionic surfactant can contact with the air more effectively to form a large amount of foam. The foam can increase the contact area between the detergent and the stain. The synergistic effect of the non-ionic surfactant and the penetrant enables the detergent to quickly penetrate into the stain and effectively decompose and remove various stubborn stains. DETAILED DESCRIPTION

[0023] The features of the present invention and other related features are further described in detail below through embodiments to facilitate understanding by those skilled in the art:

[0024] An embodiment of the present invention provides a color-changing foam cleanser, comprising the following raw materials in parts by mass: 5 to 10 parts of a nonionic surfactant, 5 to 10 parts of a penetrant, 1 to 5 parts of a co-solvent, 0.2 to 1 part of a corrosion inhibitor, 60 to 70 parts of deionized water, 0.08 to 2 parts of an acid-base indicator, 10 to 20 parts of a propellant, 5 to 10 parts of a pH adjuster, and 0.1 to 0.5 parts of an essence.

[0025] In some embodiments, the nonionic surfactant is one or more of fatty alcohol polyoxyethylene ether, carbonyl alcohol polyoxyethylene ether, isomeric alcohol polyoxyethylene ether, fatty amine polyoxyethylene ether, fatty acid diethanolamide, APG, amine oxide, and fatty acid methyl ester ethoxylate.

[0026] In some embodiments, the EO number of the fatty alcohol polyoxyethylene ether, carbonyl alcohol polyoxyethylene ether, isomeric alcohol polyoxyethylene ether, and fatty amine polyoxyethylene ether ranges from 2 to 15, has excellent wetting and emulsifying abilities, can quickly penetrate into stains, and decompose them into smaller particles, thereby improving the cleaning effect.

[0027] In some embodiments, the penetrant is one or more of ethanol, ethylene glycol, polyethylene glycol, propylene glycol, isopropyl alcohol, glycerol, sorbitol, diethylene glycol, and dipropylene glycol, which can enable the detergent to penetrate the stains, thereby improving the detergent's decontamination effect.

[0028] In some embodiments, the cosolvent is one or more of ethylene glycol butyl ether, ethylene glycol tert-butyl ether, propylene glycol butyl ether, diethylene glycol methyl ether, diethylene glycol ethyl ether, diethylene glycol butyl ether, diethylene glycol dimethyl ether, diethylene glycol hexyl ether, dipropylene glycol methyl ether, dipropylene glycol methyl ether acetate, dipropylene glycol butyl ether acetate, dipropylene glycol butyl ether, triethylene glycol methyl ether, triethylene glycol ethyl ether, tripropylene glycol butyl ether, ethylene glycol phenyl ether, and propylene glycol propyl ether. The cosolvent can effectively dissolve stains that are difficult to remove, such as grease and pigment, and the cosolvent is compatible with non-ionic surfactants, corrosion inhibitors, and acid-base indicators, and can stabilize the detergent.

[0029] In some embodiments, the corrosion inhibitor is one or more of sodium benzoate, sodium nitrite, triethanolamine, kasone, and benzotriazole. During the cleaning process, the corrosion inhibitor protects the surface of the object from corrosion.

[0030] In some embodiments, the acid-base indicator is one or more of thymol blue, thymolphthalein, alizarin yellow R, phenolphthalein, phenol red, dardan yellow, peacock blue, alizarin red S, cresol red, neutral red, and bromothymol blue.

[0031] In some embodiments, the propellant is liquefied petroleum gas.

[0032] In some embodiments, the pH adjuster is one or more of citric acid, sodium citrate, sodium metasilicate, and sodium hydroxide; the pH adjuster is used to adjust the pH value of the color-changing foam cleaner to 8-9.5, so that the cleaner is weakly alkaline. Compared with weakly acidic cleaners, using weakly alkaline cleaners to clean metal objects will not damage the metal objects. When stains such as grease are emulsified and dissolved into the foam under the action of non-ionic surfactants, penetrants, and cosolvents, further, grease will hydrolyze when it encounters alkali, resulting in a decrease in the pH value of the cleaner, thereby causing the acid-base indicator to change color, meeting the color change requirements of the cleaner.

[0033] An embodiment of the present invention also provides a method for preparing a color-changing foam cleaning agent, comprising the following steps:

[0034] Step 1: Add the corrosion inhibitor and pH adjuster into deionized water, stir and dissolve; then add the acid-base indicator, stir and dissolve to obtain liquid A;

[0035] Step 2: Stir and mix the nonionic surfactant, penetrant, cosolvent and flavor to obtain liquid B;

[0036] Step 3: Add liquid A to liquid B, stir and mix to obtain a feed liquid;

[0037] Step 4: Pour the liquid into the spray can, seal the valve, and finally fill the propellant into the spray can.

[0038] Embodiment 1 of the present invention provides a color-changing foam cleaning agent, and the preparation method thereof comprises the following steps:

[0039] Step 1: Add 0.3g sodium benzoate, 0.3g sodium nitrite and 0.2g sodium hydroxide to 69.8g deionized water, stir to dissolve, stirring at a speed of 1500 rpm, stirring at a temperature of 30°C, and stirring for 15min. Then add 0.1g thymol blue, stir to dissolve, stirring at a speed of 500 rpm, stirring at a temperature of 30°C, and stir for 15min to obtain liquid A.

[0040] Step 2: 4 g APG, 3 g fatty alcohol polyoxyethylene ether, 2 g fatty acid diethanolamide, 3 g ethanol, 5 g diethylene glycol butyl ether, and 0.3 g limonene were stirred at a stirring temperature of 30° C. and a stirring speed of 500 rpm for 10 min to obtain liquid B.

[0041] Step 3: Add liquid A to liquid B, stirring at a speed of 1000 rpm and a temperature of 30°C, and stir for 10 minutes to obtain the feed liquid.

[0042] Step 4: Pour the liquid into the spray can, seal the valve, and finally fill 12g of propellant into the spray can. The propellant includes 30% propane and 70% butane by volume.

[0043] Examples 2 to 3 and Comparative Examples 1 to 6: The raw material formula is changed according to Table 1, and the color-changing foam cleansers of Examples 2 to 3 and Comparative Examples 1 to 6 are prepared according to the preparation method of Example 1.

[0044] Table 1 Formulas of Examples 1 to 3 and Comparative Examples 1 to 6

[0045]

[0046]

[0047] Decontamination test

[0048] (1) Test instruments: 250 mL beaker, 15 cm × 10 cm tinplate sheet, ceramic mortar, and electronic balance with an accuracy of 0.01 g.

[0049] (2) Preparation of waste liquid: Weigh 1 g of carbon black into a ceramic mortar, grind for 5 min, add 5 g of peanut oil and continue grinding for 30 min, then pour into a 250 mL beaker, add 20 g of peanut oil, 70 g of butter and 4 g of stearic acid respectively, heat on an electric stove to about 70°C, stir evenly and set aside.

[0050] (3) Preparation of test pieces: The test pieces were cleaned with detergent, dried in an oven at (105±2)°C, and then cooled in a drying tower for later use.

[0051] (4) Determination steps: Take a clean test piece that has been dried and put aside, weigh m1, and evenly apply 3g of dirty liquid on the test piece in an area of ​​about 12cm×8cm with a small broom, weigh m2, and then evenly spray 10g of the product on the dirty liquid on the test piece. After leaving it for a specified time, wipe it with a cloth, and then rinse the test piece with clean water. Put it in an oven at (105±2)℃ to dry, then put it in a drying tower to cool to room temperature and take it out, weigh m3 (all accurate to 0.01g).

[0052] (5) Calculation of the decontamination rate: The decontamination rate X1 (%) is calculated according to formula (1).

[0053]

[0054] The sample examples 1 to 3 and comparative examples 1 to 6 were tested for decontamination rate, and the decontamination rate was measured every 1 minute until 10 minutes according to the "measurement steps". The decontamination rate comparison data with the color change end point time of examples 1, 2, and 3 are as follows:

[0055] Table 2 Decontamination test results of Examples 1 to 3 and Comparative Examples 1 to 6

[0056]

[0057]

[0058] (1) It can be seen from Examples 1 to 3 that the decontamination rate of the present invention can reach more than 92% when the end time of the color change reaction is reached, which meets the industry requirement that the decontamination rate must be higher than 90%. Moreover, the decontamination rate at the end of the color change reaction / the decontamination rate at the 10th minute is greater than 98%, indicating that the effect of improving the decontamination rate of the detergent is no longer obvious as time goes by. The user can intuitively observe the end point of the color change reaction of the detergent and rinse the foam at the end point of the color change reaction. The detergent can achieve a higher cleaning efficiency and avoid the situation where the user rinses the foam in advance and wastes the detergent.

[0059] (2) By comparing Example 3 with Comparative Example 1, it can be seen that when the mass of the acid-base indicator in the detergent is reduced, the sensitivity of the acid-base indicator to the change in the pH value of the detergent is reduced, resulting in a delayed end point of the color change reaction and the detergent decontamination rate improvement effect is no longer obvious. In order to shorten the time for cleaning stains and shorten the waiting time of users, the mass fraction of the acid-base indicator in the detergent should be no less than 0.08 parts, that is, the mass fraction of the acid-base indicator should be no less than 0.08%.

[0060] By comparing Example 3 with Comparative Example 2, it can be seen that the mass fraction of the acid-base indicator in Comparative Example 2 is greater than that in Example 3, and when Comparative Example 2 reaches the end point of the color change reaction earlier than Example 3, the decontamination rate can reach more than 92%, indicating that the larger the mass fraction of the acid-base indicator, the higher the sensitivity of the acid-base indicator to the change in the pH value of the detergent. However, the color change end point of Comparative Example 2 is not significantly earlier than that of Example 3, and the cost of the acid-base indicator is relatively high. In summary, the mass fraction of the acid-base indicator in the detergent is preferably not more than 0.2.

[0061] (3) By comparing Example 3 with Comparative Examples 3 and 4, it can be seen that when the mass fraction of the nonionic surfactant is less than 5, the decontamination rate of the detergent is significantly reduced, and at the end of the color change reaction, the decontamination rate is less than 90%. When the mass fraction of the nonionic surfactant is more than 10, the decontamination rate of the detergent is not significantly improved. Considering the high cost of the nonionic surfactant, the mass fraction of the nonionic surfactant in the detergent is preferably 5 to 10.

[0062] (4) By comparing Example 3 with Comparative Examples 5 and 6, it can be seen that a reduction in the mass fraction of the penetrant and the co-solvent will lead to a significant decrease in the stain removal rate of the detergent. This is because the penetrant can promote the penetration of the detergent into stains, and the co-solvent can effectively dissolve difficult-to-remove stains such as grease. A reduction in the mass fraction of the penetrant and the co-solvent in the detergent will lead to a decrease in the penetration ability and stain dissolving ability of the detergent. Therefore, the mass fraction of the penetrant in the detergent is preferably 5 to 10, and the mass fraction of the co-solvent is preferably 1 to 5.

[0063] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the specification of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A color-changing foam cleaner, characterized in that: The invention comprises the following raw materials in parts by weight: 5 to 10 parts of non-ionic surfactant, 5 to 10 parts of penetrant, 1 to 5 parts of co-solvent, 0.2 to 1 part of corrosion inhibitor, 60 to 70 parts of deionized water, 0.08 to 2 parts of acid-base indicator, 10 to 20 parts of propellant, 5 to 10 parts of pH regulator and 0.1 to 0.5 parts of flavor.

2. A color-changing foam cleaner according to claim 1, characterized in that: The nonionic surfactant is one or more of fatty alcohol polyoxyethylene ether, carbonyl alcohol polyoxyethylene ether, isomeric alcohol polyoxyethylene ether, fatty amine polyoxyethylene ether, fatty acid diethanolamide, APG, amine oxide, and fatty acid methyl ester ethoxylate.

3. A color-changing foam cleaner according to claim 2, characterized in that: The EO number of the fatty alcohol polyoxyethylene ether, carbonyl alcohol polyoxyethylene ether, isomeric alcohol polyoxyethylene ether and fatty amine polyoxyethylene ether is in the range of 2 to 15.

4. A color-changing foam cleaner according to claim 1, characterized in that: The penetrant is one or more of ethanol, ethylene glycol, polyethylene glycol, propylene glycol, isopropanol, glycerol, sorbitol, diethylene glycol, and dipropylene glycol.

5. A color-changing foam cleaner according to claim 1, characterized in that: The cosolvent is one or more of ethylene glycol butyl ether, ethylene glycol tert-butyl ether, propylene glycol butyl ether, diethylene glycol methyl ether, diethylene glycol ethyl ether, diethylene glycol butyl ether, diethylene glycol dimethyl ether, diethylene glycol hexyl ether, dipropylene glycol methyl ether, dipropylene glycol methyl ether acetate, dipropylene glycol butyl ether acetate, dipropylene glycol butyl ether, triethylene glycol methyl ether, triethylene glycol ethyl ether, tripropylene glycol butyl ether, ethylene glycol phenyl ether, and propylene glycol propyl ether.

6. A color-changing foam cleaning agent according to claim 1, characterized in that: The corrosion inhibitor is one or more of sodium benzoate, sodium nitrite, triethanolamine, kasone, and benzotriazole.

7. A color-changing foam cleaning agent according to claim 1, characterized in that: The acid-base indicator is one or more of thymol blue, thymolphthalein, alizarin yellow R, phenolphthalein, phenol red, dardan yellow, peacock blue, alizarin red S, cresol red, neutral red, and bromothymol blue.

8. The color-changing foam cleaning agent according to claim 1, characterized in that: The propellant is liquefied petroleum gas.

9. The color-changing foam cleaning agent according to claim 1, characterized in that: The pH value regulator is one or more of citric acid, sodium citrate, sodium metasilicate and sodium hydroxide; the pH value regulator is used to adjust the pH value of the color-changing foam cleaner to 8-9.

5.

10. A method for preparing the color-changing foam cleaning agent according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Add the corrosion inhibitor and pH adjuster into deionized water, stir and dissolve; then add the acid-base indicator, stir and dissolve to obtain liquid A; Step 2: Stir and mix the nonionic surfactant, penetrant, cosolvent and flavor to obtain liquid B; Step 3: Add liquid A to liquid B, stir and mix to obtain a feed liquid; Step 4: Pour the liquid into the spray can, seal the valve, and finally fill the propellant into the spray can.

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