Detergent with high foam amount and foam stability

Abstract

The invention relates to the technical field of detergents, and discloses a detergent with high foam amount and foam stability. The detergent is prepared from polyoxyethylene sorbitan monolaurate and a surface active agent, in the detergent, the mass fraction of the polyoxyethylene sorbitan monolaurate is 0.02 to 6 percent, and the mass ratio of the polyoxyethylene sorbitan monolaurate to the surfactant is (0.015 to 0.2): 1. According to the invention, the polyoxyethylene sorbitan monolaurate is added into the detergent, the interaction between the polyoxyethylene sorbitan monolaurate and the surfactant can be utilized to reduce the viscosity of the system, so that the detergent is easy to extrude or spray out in a foam form, and the stability of the foam can be improved, so that the detergent can form rich and lasting foam.

Description

Technical Field

[0001] The invention relates to the technical field of detergents, in particular to a detergent with high foam volume and foam stability. Background Art

[0002] With the development of the times and the improvement of people's living standards, consumers have higher and higher requirements for daily chemical cleaning products, and the convenience of product use has also attracted more and more attention from consumers. For example, the detergent can be directly squeezed or sprayed out in the form of foam through a push-type foam pump head or a jet foam nozzle, without the need to rub or stir to produce foam before cleaning, which makes the cleaning method more convenient. However, conventional detergents have a high viscosity, so they cannot be sprayed in the form of foam, and the cleaning method is not convenient enough.

[0003] In addition, consumers are more sensitive to visual indicators when using detergent products, such as the richness of foam, whether stains are easy to remove, etc. In the minds of consumers, the richness and stability of foam are important measures of the cleaning performance of detergent products. On the one hand, consumers believe that the richer the foam of a detergent product, the stronger its cleaning ability. On the other hand, the longer the foam acts on the surface of the stain during the washing process, the longer the detergent acts on the stain and the more effective the detergent is.

[0004] In order to improve the foam richness and foam stability of detergents, the solution is mainly to use technologies that improve foam stability while using surfactants with rich foaming properties, such as adding cationic surfactants, amphoteric surfactants or polymers. Existing technologies for improving foam stability have some disadvantages: cationic surfactants are difficult to be compatible with anionic surfactants with rich foaming properties, and amphoteric surfactants and polymers easily cause the viscosity of detergents to be too high, which makes it difficult for detergents to be sprayed out in the form of foam. Summary of the invention

[0005] In order to solve the above technical problem, that is, the existing method for improving the foam stability of detergents is difficult to take into account the total amount of foam, foam stability and viscosity, the present invention provides a detergent with high foam amount and foam stability. The detergent can effectively improve the foam stability while ensuring a low viscosity, so that the detergent can be easily squeezed out or sprayed in the form of foam, and can achieve a rich total amount of foam.

[0006] The specific technical scheme of the present invention is: First, the present invention provides a detergent with high foam volume and foam stability, the detergent comprising polyoxyethylene sorbitan monolaurate and a surfactant; in the detergent, the mass fraction of polyoxyethylene sorbitan monolaurate is 0.02-6%, and the mass ratio between polyoxyethylene sorbitan monolaurate and the surfactant is 0.015-0.2:1.

[0007] The present invention can play the following roles by adding a specific amount of polyoxyethylene sorbitan monolaurate to the detergent and controlling the ratio between the polyoxyethylene sorbitan monolaurate and the surfactant: on the one hand, the hydrophilic group of polyoxyethylene sorbitan monolaurate is large and uncharged. After being inserted into the surfactant micelle, the size of the newly formed micelle can be enlarged, and the electrostatic repulsion between the surfactant molecules is reduced, thereby reducing the viscosity of the detergent, so that it can be squeezed out or sprayed out in the form of foam through a push-type foam pump head or a jet-type foam nozzle, and the cleaning method is more convenient; on the other hand, the hydroxyl group of polyoxyethylene sorbitan monolaurate can form a variety of hydrogen bonds with the hydrophilic group, oxyethylene group and water of the surfactant, so that the interaction between the surfactant molecules is stronger, and the hydrophobic group is arranged more closely, thereby improving the strength of the foam liquid film and improving the foam stability. In the above manner, polyoxyethylene sorbitan monolaurate can enable the detergent to extrude or spray rich, stable and lasting foam under normal temperature and low temperature conditions.

[0008] Regarding the polyoxyethylene sorbitan monolaurate used in the present invention, the carbon chain length of the fatty acid (lauric acid) has an important influence on its effect of improving foam stability. When the carbon chain length of the fatty acid is too large, the foam surface film formed by the detergent will be too rigid, which will lead to poor foam stability.

[0009] Regarding the ratio between polyoxyethylene sorbitan monolaurate and surfactant: within a certain range, as the amount of polyoxyethylene sorbitan monolaurate relative to the surfactant increases, the electrostatic repulsion between surfactant molecules can be reduced to a greater extent, and the hydrophobic groups of the surfactant molecules can be arranged more closely, thereby reducing the viscosity of the detergent and improving the richness and stability of the foam; but when the amount of polyoxyethylene sorbitan monolaurate relative to the surfactant is too high, it will cause the surface viscosity of the foam liquid film to be too low, which will lead to poor foam stability. Based on this, the present invention controls the ratio between the two within the range of 0.015-0.2:1, which can make the detergent have a higher foam richness and foam stability.

[0010] Preferably, the mass ratio of the polyoxyethylene sorbitan monolaurate to the surfactant is 0.1-0.2:1.

[0011] By controlling the mass ratio between polyoxyethylene sorbitan monolaurate and the surfactant at 0.1-0.2:1, the richness of the foam generated by the detergent can be further improved.

[0012] Preferably, in the detergent, the mass fraction of the surfactant is 1-30%.

[0013] Furthermore, in the detergent, the mass fraction of the surfactant is 20-30%.

[0014] In the detergent of the present invention, when the content of the surfactant is too low, it will cause the foam liquid film formed by it to be difficult to self-repair when deformed by gravity, thus resulting in less foam and difficulty in lasting; when the content of the surfactant is too high, it will cause the foam liquid film strength to be low, which will also have an adverse effect on the foam stability. Based on this, the present invention controls the mass fraction of the surfactant in the detergent to 1-30%, which can improve the richness and stability of the foam generated by the detergent. On this basis, by further controlling the parameter to 20-30%, the richness of the foam can be improved to a greater extent.

[0015] Preferably, in the polyoxyethylene sorbitan monolaurate, the degree of polymerization of polyoxyethylene is 15-25.

[0016] Preferably, the surfactant includes at least one of anionic surfactants, nonionic surfactants and amphoteric surfactants.

[0017] Preferably, the type of each surfactant satisfies at least one of the following (i)-(iii): (i) The anionic surfactant includes C 10-16 Sodium alkylbenzene sulfonate, C 10-16 Sodium fatty alcohol polyoxyethylene ether sulfate, C 8-16 Sodium fatty alcohol sulfate, C 12-18 Sodium fatty acid methyl ester sulfonate, C 10-18 Sodium secondary alkyl sulfonate, C 14-16 At least one of sodium olefin sulfonate, disodium lauryl sulfosuccinate, disodium lauryl polyoxyethylene ether sulfosuccinate, disodium cocoyl glutamate and sodium dioctyl sulfosuccinate; (ii) the nonionic surfactant comprises C 8-16 Alkyl glucoside, cocoyl methyl glucamide, C 12-18 Fatty alcohol polyoxyethylene ether, C 9-11 Fatty alcohol polyoxyethylene ether, C 12-14 At least one of secondary alcohol ethoxylate and fatty acid polyglycerol ester; (iii) the amphoteric surfactant includes cocamidopropyl betaine,12-14 At least one of alkyl dimethyl betaine, cocamidopropyl hydroxysultaine, cocamidopropyl amine oxide and coco dimethyl amine oxide.

[0018] Preferably, the detergent further comprises an auxiliary agent; the mass fraction of the auxiliary agent in the detergent is 0.001-10%; the auxiliary agent comprises at least one of a chelating agent, a preservative, an organic solvent, a pH regulator, a hydrotrope, an enzyme preparation, an antioxidant, a functional auxiliary agent, a flavor and a pigment.

[0019] Preferably, in the detergent, the content of each auxiliary agent satisfies at least one of the following (a)-(g): (a) the mass fraction of the chelating agent in the detergent is 0.01-5%; (b) the mass fraction of the preservative in the detergent is 0.01-5%; (c) the mass fraction of the organic solvent in the detergent is 0.01-10%; (d) the mass fraction of the pH regulator in the detergent is 0.01-10%; (e) the mass fraction of the hydrotrope in the detergent is 0.1-10%; (f) the mass fraction of the enzyme preparation in the detergent is 0.01-10%; (g) The mass fraction of the antioxidant in the detergent is 0.001-1%.

[0020] Preferably, the chelating agent includes at least one of tetrasodium glutamate diacetate, trisodium N,N-di(carboxymethyl)alanine, disodium ethylenediaminetetraacetate, tetrasodium ethylenediaminetetraacetate, aminotri(methylenephosphonic acid), diethylenetriaminepenta(methylenephosphonic acid), hexamethylenediaminetetra(methylenephosphonic acid), bis-hexamethylenetriaminepentamethylenephosphonic acid and 1-hydroxyethylidene-1,1-diphosphonic acid.

[0021] Preferably, the preservative includes at least one of phenoxyethanol, sodium benzoate, potassium sorbate, methylisothiazolinone, methylchloroisothiazolinone, benzisothiazolinone and methylparaben.

[0022] Preferably, the organic solvent comprises at least one of ethanol, propylene glycol, glycerol, diethylene glycol butyl ether, diethylene glycol ethyl ether, dipropylene glycol butyl ether, glycerol acetone acetal and isohexanediol.

[0023] Preferably, the pH adjuster includes at least one of lactic acid, citric acid, oxalic acid, hydrochloric acid, aminosulfonic acid, methanesulfonic acid, sodium hydroxide, potassium hydroxide, sodium carbonate, sodium bicarbonate, triethanolamine and monoethanolamine.

[0024] Preferably, the hydrotrope comprises at least one of sodium xylene sulfonate, sodium cumene sulfonate and sodium p-toluene sulfonate.

[0025] Preferably, the enzyme preparation comprises at least one of protease, cellulase, amylase, lipase, cutinase, catalase and mannanase.

[0026] Preferably, the antioxidant includes at least one of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate (antioxidant AT76), 2,6-di-tert-butyl-4-methylphenol (BHT), tert-butyl-4-hydroxyanisole (BHA), tert-butylhydroquinone (TBHQ) and tea polyphenols.

[0027] Preferably, the functional auxiliary agent includes at least one of a polymer, an antibacterial agent, an ultraviolet absorber, a softener and a whitening agent.

[0028] Preferably, the viscosity of the detergent at 25°C and 2°C does not exceed 20 mPa·s.

[0029] Secondly, the present invention provides the use of polyoxyethylene sorbitan monolaurate in improving the foam quantity and foam stability of a detergent extruded or sprayed, wherein the detergent contains a surfactant.

[0030] Preferably, in the detergent, the mass fraction of polyoxyethylene sorbitan monolaurate is 0.02-6%, the mass fraction of the surfactant is 1-30%, and the mass ratio between polyoxyethylene sorbitan monolaurate and the surfactant is 0.015-0.2:1.

[0031] Compared with the prior art, the present invention has the following advantages: (1) The present invention adds polyoxyethylene sorbitan monolaurate to the detergent, and utilizes the interaction between the polyoxyethylene sorbitan monolaurate and the surfactant to reduce the viscosity of the system (the viscosity of the detergent at room temperature and low temperature is not more than 20 mPa·s), so that the detergent can be easily extruded or sprayed in the form of foam, and the stability of the foam can be improved, so that the detergent can form rich and lasting foam.

[0032] (2) In the present invention, by controlling the content of polyoxyethylene sorbitan monolaurate and surfactant in the detergent, as well as the ratio between the two within a specific range, the foam generated by the detergent can have a higher richness and stability. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the embodiments.

[0034] Overall embodiment In a first aspect, the present invention relates to a detergent with high foam volume and foam stability, the detergent comprising polyoxyethylene sorbitan monolaurate and a surfactant; in the detergent, the mass fraction of polyoxyethylene sorbitan monolaurate is 0.02-6%, and the mass ratio between polyoxyethylene sorbitan monolaurate and the surfactant is 0.015-0.2:1.

[0035] In the above first aspect, in some specific embodiments, in the detergent, the mass fraction of the surfactant is 1-30%.

[0036] In a second aspect, the present invention relates to the use of polyoxyethylene sorbitan monolaurate in improving the foam quantity and foam stability of a detergent extruded or sprayed, wherein the detergent contains a surfactant.

[0037] In the above second aspect, in some specific embodiments, in the detergent, the mass fraction of polyoxyethylene sorbitan monolaurate is 0.02-6%, the mass fraction of the surfactant is 1-30%, and the mass ratio between polyoxyethylene sorbitan monolaurate and the surfactant is 0.015-0.2:1.

[0038] In the first and second aspects above: In some specific embodiments, in the polyoxyethylene sorbitan monolaurate, the degree of polymerization of polyoxyethylene is 15-25.

[0039] In some specific embodiments, the viscosity of the detergent at 25°C and 2°C does not exceed 20 mPa·s.

[0040] In some specific embodiments, the surfactant includes at least one of anionic surfactant, nonionic surfactant and amphoteric surfactant, and the types of each surfactant are as follows: (i) Anionic surfactants: including C 10-16 Sodium alkylbenzene sulfonate, C 10-16 Sodium fatty alcohol polyoxyethylene ether sulfate, C 8-16 Sodium fatty alcohol sulfate, C 12-18 Sodium fatty acid methyl ester sulfonate, C 10-18 Sodium secondary alkyl sulfonate, C 14-16 At least one of sodium olefin sulfonate, disodium lauryl sulfosuccinate, disodium lauryl polyoxyethylene ether sulfosuccinate, disodium cocoyl glutamate and sodium diisooctyl sulfosuccinate.

[0041] (ii) Nonionic surfactants: including C 8-16 Alkyl glucoside, cocoyl methyl glucamide, C 12-18 Fatty alcohol polyoxyethylene ether, C 9-11Fatty alcohol polyoxyethylene ether, C 12-14 At least one of secondary alcohol ethoxylate and fatty acid polyglycerol ester.

[0042] (iii) Amphoteric surfactants: including cocamidopropyl betaine, C 12-14 At least one of alkyl dimethyl betaine, cocamidopropyl hydroxysultaine, cocamidopropyl amine oxide and coco dimethyl amine oxide.

[0043] As a specific embodiment, the surfactant includes the following components by mass fraction in the detergent: C 10-16 Sodium fatty alcohol polyoxyethylene ether sulfate 1-10%, C 10-16 Sodium alkylbenzene sulfonate 1-10%, C 8-16 Alkyl Glucoside 0.1-3%, Cocamidopropyl Betaine 0.1-3%, Cocamidopropyl Amine Oxide 0.1-3%.

[0044] As another specific embodiment, the surfactant comprises the following components by mass fraction in the detergent: 8-16 Sodium fatty alcohol sulfate 1-10%, C 10-18 Sodium secondary alkyl sulfonate 5-20%, C 12-18 Fatty alcohol polyoxyethylene ether 1-15%, C 12-14 Alkyl dimethyl betaine 0.1-3%, cocamidopropyl hydroxysultaine 0.1-4%.

[0045] As another specific embodiment, the surfactant comprises the following components by mass fraction in the detergent: 8-16 Sodium fatty alcohol sulfate 0-8%, C 10-16 Sodium alkylbenzene sulfonate 0-7.5%, C 14-16 Sodium olefin sulfonate 0-10%, C 12-18 Fatty alcohol polyoxyethylene ether 0-10%, C 8-16 Alkyl Glucoside 0-1%, Cocamidopropylamine Oxide 0-2%.

[0046] In some specific embodiments, the detergent further comprises an auxiliary agent; the mass fraction of the auxiliary agent in the detergent is 0.001-10%; the auxiliary agent comprises at least one of a chelating agent, a preservative, an organic solvent, a pH regulator, a hydrotrope, an enzyme preparation, an antioxidant, a functional auxiliary agent, a flavor and a pigment, and the type and content of each auxiliary agent are as follows: (a) Chelating agent: at least one of glutamic acid diacetate tetrasodium, N,N-di(carboxymethyl)alanine trisodium salt, ethylenediaminetetraacetic acid disodium, ethylenediaminetetraacetic acid tetrasodium, aminotri(methylenephosphonic acid), diethylenetriaminepenta(methylenephosphonic acid), hexamethylenediaminetetra(methylenephosphonic acid), bis-hexamethylenetriaminepentamethylenephosphonic acid and 1-hydroxyethylidene-1,1-diphosphonic acid. If a chelating agent is used, the mass fraction of the chelating agent in the detergent is 0.01-5%, preferably 0.1-2%.

[0047] (b) Preservatives: including at least one of phenoxyethanol, sodium benzoate, potassium sorbate, methylisothiazolinone, methylchloroisothiazolinone, benzisothiazolinone and methylparaben. If a preservative is used, the mass fraction of the preservative in the detergent is 0.01-5%, preferably 0.02-2%.

[0048] (c) Organic solvent: at least one of ethanol, propylene glycol, glycerol, diethylene glycol butyl ether, diethylene glycol ethyl ether, dipropylene glycol butyl ether, glycerol acetone acetal and isohexylene glycol. If an organic solvent is used, the mass fraction of the organic solvent in the detergent is 0.01-10%, preferably 0.05-10%.

[0049] (d) pH adjuster: at least one of lactic acid, citric acid, oxalic acid, hydrochloric acid, aminosulfonic acid, methanesulfonic acid, sodium hydroxide, potassium hydroxide, sodium carbonate, sodium bicarbonate, triethanolamine and monoethanolamine. If a pH adjuster is used, the mass fraction of the pH adjuster in the detergent is 0.01-10%, preferably 0.01-5%.

[0050] (e) Hydrotrope: at least one of sodium xylene sulfonate, sodium cumene sulfonate and sodium p-toluene sulfonate. If a hydrotrope is used, the mass fraction of the hydrotrope in the detergent is 0.1-10%, preferably 1-10%.

[0051] (f) Enzyme preparation: including at least one of protease, cellulase, amylase, lipase, cutinase, catalase and mannanase. If an enzyme preparation is used, the mass fraction of the enzyme preparation in the detergent is 0.01-10%, preferably 0.1-5%.

[0052] (g) Antioxidant: at least one of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate (antioxidant AT76), 2,6-di-tert-butyl-4-methylphenol (BHT), tert-butyl-4-hydroxyanisole (BHA), tert-butylhydroquinone (TBHQ) and tea polyphenol. If an antioxidant is used, the mass fraction of the antioxidant in the detergent is 0.001-1%, preferably 0.001-0.5%.

[0053] (h) Functional additives: including at least one of polymers, antibacterial agents, ultraviolet absorbers, softeners and whitening agents. in: The polymers include, but are not limited to, salts of homopolymers and copolymers of acrylic acid, cellulose derivatives, homopolymers and copolymers of vinyl pyrrolidone, polyethylene imine derivatives, polyethylene terephthalate and its derivatives, polyethylene glycol and its derivatives; Antibacterial agents include but are not limited to: hypochlorous acid and its salts, p-chlororesorcinol, p-chlororesorcinol, hydroxydichlorodiphenyl ether, hydroxytrichlorodiphenyl ether, triclocarban, o-phenylphenol, dodecyldimethylbenzylammonium chloride, dodecyltrimethylammonium chloride, tetradecyldimethylbenzylammonium chloride, tetradecyltrimethylammonium chloride, hexadecyltrimethylammonium chloride, octadecyltrimethylammonium chloride, didecyldimethylammonium chloride, polyhexamethylene biguanide hydrochloride, 1-hexadecylpyridinium chloride, pyrithione zinc, pyridoneethanolamine salt; The ultraviolet absorber includes but is not limited to: phenyl o-hydroxybenzoate, ultraviolet absorber UV-P, ultraviolet absorber UV-O, ultraviolet absorber UV-9, ultraviolet absorber UV-531, ultraviolet absorber UVP-327, ultraviolet absorber RMB, triazine ultraviolet absorber; Softeners include but are not limited to: distearyl succinic acid sulfonate, sorbitan fatty acid ester, fatty acid diethanolamide, modified silicone softener, quaternary ammonium salt softener, imidazoline softener; The whitening agent may be a fluorescent whitening agent, including but not limited to: distyryl biphenyl compounds, bistriazine amino distyryl compounds. The whitening agent imparts the detergent with the effect of whitening and brightening clothes.

[0054] (g) Flavors and pigments: They are common ingredients and their types are not limited. Specific embodiments The present invention is described below by specific examples. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention. Without departing from the spirit and scope of the inventive concept, changes and advantages that can be thought of by those skilled in the art are included in the present invention, and the attached claims and any equivalents thereof are the protection scope of the present invention.

[0056] In the following examples and comparative examples, the detergent performance testing method used is as follows: (1) Viscosity test: Place the detergent sample in a viscosity measurement beaker and accurately control the temperature of the sample (25°C or 2°C). Place the beaker containing the sample under the NDJ rotational viscometer, use rotor No. 1 and set the speed to 60r / min for measurement, and the value after 60 seconds is the viscosity of the detergent.

[0057] (2) Unit foam capacity test: Accurately control the temperature of the detergent to be tested (25°C or 2°C), spray foam into a 200mL measuring cylinder (inner diameter 40mm) 5 times, use a 4-digit balance to measure the mass of the 200mL measuring cylinder filled with foam, take the difference with the initial mass of the measuring cylinder as the mass of the sprayed foam, visually read the volume (mL) of the foam in the measuring cylinder, and the ratio of the foam volume to the foam mass is taken as the unit foam capacity.

[0058] (3) Foam stability test: The temperature of the detergent to be tested was accurately controlled (25°C or 2°C), and foam was sprayed 5 times into a 200mL measuring cylinder (inner diameter 40mm). The time (min) for the foam volume in the measuring cylinder to be reduced by half was recorded as the evaluation standard for the stability of the detergent foam.

[0059] (4) Oil removal rate test: ① Preparation of dirty pieces: Accurately weigh the cleaned and dried glass pieces (76mm×26mm×2mm) m0′ and number them. Evenly apply 0.1-0.3g of test oil (mixed oil in Appendix A of GB / T 9985) on the glass pieces. Apply the oil in the middle of the glass pieces, leaving about 20mm at both ends. Carefully wipe off the oil on the edges of the glass pieces. Leave at room temperature for about 2 hours, and weigh the oiled glass pieces on the weighing rack m1′.

[0060] ② Oil removal test: insert a glass piece with a known amount of stain into the corresponding washing rack and prepare for washing. Connect the detergent to the power supply, set the washing temperature to 30°C, the rotation speed to 160r / min, and the washing time to 5min. Prepare 1000mL of a certain concentration of test detergent sample solution (0.5%) and put it into the washing bucket of the vertical detergent. Quickly put the dirt pieces of known weight together with the washing racks into the washing bucket. When the last washing rack is put into the washing bucket, start the soaking time. At the same time, quickly install the agitator. After soaking for 1min, start the detergent. When the washing starts for 5min, the machine automatically stops. Quickly remove the agitator, take out the washing rack, lay it flat to dry, and then place the dirt pieces on the corresponding weighing rack to weigh m2′. Calculate the oil removal rate. The oil removal rate is the mass fraction of the oil f' washed away, expressed in %, and calculated according to the following formula:

[0061] Example 1 and Comparative Examples 1-3: Effect of fatty acid carbon chain length The detergent formulations of Example 1 and Comparative Examples 1-3 are shown in Table 1.

[0062] Table 1 Detergent formulations of Example 1 and Comparative Examples 1-3 The detergent performance of Example 1 and Comparative Examples 1-3 was tested, and the test results are shown in Table 2.

[0063] Table 2 Detergent performance test results of Example 1 and Comparative Examples 1-3 performance Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Viscosity (25℃), mPa·s 3 4 6 5 Viscosity (2℃), mPa·s 6 8 15 12 Unit foam capacity (25℃), mL / g 28 25 25 26 Unit foam capacity (2℃), mL / g 26 23 22 23 Foam stability (25℃), min 20 6 5 4 Foam stability (2℃), min 20 5 3 4 Oil removal rate, % 48.5 45.5 42.3 44.8 According to the performance test results in Table 2, it can be seen that in polyoxyethylene sorbitan mono-fatty acid esters, the carbon chain length of fatty acids will affect the effect of improving foam stability. The use of polyoxyethylene sorbitan mono-laurate in the present invention can make the detergent have a lower viscosity at both 25°C and 2°C, and can produce rich and lasting foam. When other polyoxyethylene sorbitan mono-fatty acid esters with similar structures (Comparative Examples 1-3) are used, the foam richness and foam stability are lower than those in Example 1, which may be related to the carbon chain length of its fatty acid. The carbon number of the carbon chain of the polyoxyethylene sorbitan fatty acid ester in Comparative Examples 1-3 is greater than 14, and compared with the carbon number of 12 of the carbon chain of the polyoxyethylene sorbitan mono-laurate in Example 1, the carbon chain is too long, the rigidity of the foam surface film formed is too strong, and the foam stability is poor.

[0064] Examples 2-5 and Comparative Examples 4-6: Effect of the Ratio of Polyoxyethylene Sorbitan Monolaurate to Surfactant The detergent formulas of Examples 2-5 and Comparative Examples 4-6 are shown in Table 3.

[0065] Table 3 Detergent formulations of Examples 2-5 and Comparative Examples 4-6 The detergent performances of Examples 2-5 and Comparative Examples 4-6 were tested, and the test results are shown in Table 4.

[0066] Table 4 Detergent performance test results of Examples 2-5 and Comparative Examples 4-6 According to the performance test results in Table 4, it can be seen that by adding polyoxyethylene sorbitan monolaurate to the detergent, the viscosity of the detergent at 25°C and 2°C can be reduced to less than 20mPa·s. Moreover, when the mass ratio of polyoxyethylene sorbitan monolaurate to the surfactant in the detergent is greater than 0.015:1, the foam stability of the detergent is improved, and as the mass ratio increases, the foam richness and foam stability of the detergent gradually increase. However, when the mass ratio of polyoxyethylene sorbitan monolaurate to the surfactant is greater than 0.2:1, the foam richness and foam stability of the detergent decrease instead. This may be because when the mass ratio is too large, the surface viscosity of the foam liquid film is too low, and the surface viscosity of the foam liquid film is too low or too high, which will cause the generated foam to be unstable. Therefore, the preferred range of the mass ratio of polyoxyethylene sorbitan monolaurate to the surfactant is 0.015-0.2:1.

[0067] Examples 6-14: Effect of surfactant content in detergent The detergent formulations of Examples 6-14 are shown in Table 5.

[0068] Table 5 Detergent formulations of Examples 6-14 The detergent performance of Examples 6-14 was tested, and the test results are shown in Table 4.

[0069] Table 6 Detergent performance test results of Examples 6-14 According to the performance test results in Table 6, it can be seen that: when the surfactant content is within the range of 1-30%, as the surfactant content increases, the foam becomes richer and richer, and the difference in foam stability is not large. However, when the surfactant content is lower than 1% or higher than 30%, even if the amount of polyoxyethylene sorbitan monolaurate added and its mass ratio to the surfactant are within the specified range, the foam stability of the detergent is very poor. This may be related to the surfactant concentration in the detergent. When the concentration is too low, the liquid film forming the foam is difficult to self-repair when deformed by gravity, and when the concentration is too high, the liquid film forming the foam has poor strength and poor foam stability.

[0070] Examples 2, 15 and 16: Using polyoxyethylene sorbitan monolaurate with different degrees of polymerization The detergent formulations of Examples 2, 15 and 16 are shown in Table 7.

[0071] Table 7 Detergent formulations of Examples 2, 15 and 16 The detergent performance of Examples 2, 15 and 16 was tested, and the test results are shown in Table 8.

[0072] Table 8 Detergent performance test results of Examples 2, 15 and 16 performance Example 2 Embodiment 15 Example 16 Viscosity (25℃), mPa·s 14 16 12 Viscosity (2℃), mPa·s 16 17 13 Unit foam capacity (25℃), mL / g 42 41 43 Unit foam capacity (2℃), mL / g 41 40 42 Foam stability (25℃), min 22 20 23 Foam stability (2℃), min 21 19 22 Oil removal rate, % 54.7 56.8 55.1 According to the performance test results in Table 8, it can be seen that the degree of polymerization of polyoxyethylene of polyoxyethylene sorbitan monolaurate is in the range of 15-20. As the degree of polymerization increases, the viscosity of the detergent at 25°C and 2°C gradually decreases, and the foam richness and foam stability tend to increase, but not significantly.

[0073] Unless otherwise defined, all technical terms and scientific terms used in the present invention have the same meanings as those commonly understood by ordinary technicians in the field to which the present disclosure belongs. Unless otherwise specified, the raw materials and equipment used in the present invention are conventional raw materials and equipment in the field and can be obtained from conventional commercial channels; unless otherwise specified, the methods used in the present invention are conventional methods in the field.

[0074] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A detergent with high foam volume and foam stability, characterized in that: The detergent comprises polyoxyethylene sorbitan monolaurate and a surfactant; in the detergent, the mass fraction of polyoxyethylene sorbitan monolaurate is 0.02-6%, and the mass ratio between polyoxyethylene sorbitan monolaurate and the surfactant is 0.015-0.2:

1.

2. The detergent according to claim 1, characterized in that The mass ratio between the polyoxyethylene sorbitan monolaurate and the surfactant is 0.1-0.2:

1.

3. The detergent according to claim 1, characterized in that In the detergent, the mass fraction of the surfactant is 1-30%.

4. The detergent according to claim 3, characterized in that In the detergent, the mass fraction of the surfactant is 20-30%.

5. The detergent according to claim 1, characterized in that In the polyoxyethylene sorbitan monolaurate, the polymerization degree of polyoxyethylene is 15-25.

6. The detergent according to claim 1, characterized in that The surfactant includes at least one of anionic surfactants, nonionic surfactants and amphoteric surfactants.

7. The detergent according to claim 6, characterized in that The type of each surfactant satisfies at least one of the following (i)-(iii): (i) The anionic surfactant includes C 10-16 Sodium alkylbenzene sulfonate, C 10-16 Sodium fatty alcohol polyoxyethylene ether sulfate, C 8-16 Sodium fatty alcohol sulfate, C 12-18 Sodium fatty acid methyl ester sulfonate, C 10-18 Sodium secondary alkyl sulfonate, C 14-16 At least one of sodium olefin sulfonate, disodium lauryl sulfosuccinate, disodium lauryl polyoxyethylene ether sulfosuccinate, disodium cocoyl glutamate and sodium dioctyl sulfosuccinate; (ii) The nonionic surfactant includes C 8-16 Alkyl glucoside, cocoyl methyl glucamide, C 12-18 Fatty alcohol polyoxyethylene ether, C 9-11 Fatty alcohol polyoxyethylene ether, C 12-14 At least one of secondary alcohol ethoxylate and fatty acid polyglycerol ester; (iii) The amphoteric surfactant includes cocamidopropyl betaine, C 12-14 At least one of alkyl dimethyl betaine, cocamidopropyl hydroxysultaine, cocamidopropyl amine oxide and coco dimethyl amine oxide.

8. The detergent according to claim 1, characterized in that The detergent also includes an auxiliary agent; the mass fraction of the auxiliary agent in the detergent is 0.001-10%; the auxiliary agent includes at least one of a chelating agent, a preservative, an organic solvent, a pH regulator, a hydrotrope, an enzyme preparation, an antioxidant, a functional auxiliary agent, a flavor and a pigment.

9. The use of polyoxyethylene sorbitan monolaurate in improving the foam amount and foam stability of detergent extrusion or spraying, characterized in that: The detergent contains a surfactant.

10. The use according to claim 9, characterized in that: In the detergent, the mass fraction of polyoxyethylene sorbitan monolaurate is 0.02-6%, the mass fraction of the surfactant is 1-30%, and the mass ratio between polyoxyethylene sorbitan monolaurate and the surfactant is 0.015-0.2:1.

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