CN114606073B

CN114606073B - Detergent with maximum viscosity-temperature curve

Info

Publication number: CN114606073B
Application number: CN202210360838.6A
Authority: CN
Inventors: 靳鹏伟; 施爱琴; 杨婷
Original assignee: Shanghai Hutchison Whitecat Co ltd
Current assignee: Shanghai Hutchison Whitecat Co ltd
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2023-12-05
Anticipated expiration: 2042-04-07
Also published as: CN114606073A

Abstract

The invention provides a detergent with a maximum viscosity-temperature curve, and belongs to the technical field of cleaning products. The detergent with the maximum viscosity-temperature curve provided by the invention comprises the following components: 2 to 30 weight percent of first anionic surfactant, 0 to 15 weight percent of second anionic surfactant, 0 to 20 weight percent of amphoteric surfactant, 0 to 20 weight percent of nonionic surfactant, 0.5 to 2.5 weight percent of inorganic salt thickener, 0.01 to 10 weight percent of auxiliary agent, pH value regulator and the balance of water; wherein the content of the pH value regulator is based on the pH value of the detergent being 4.0-12.0; by adopting specific components and controlling the content of each component, the viscosity-temperature curve of the detergent has a maximum value, so that the problem of overhigh viscosity of the traditional washing product under the low-temperature condition can be solved from the source, and the detergent has a very wide application prospect.

Description

Detergent with maximum viscosity-temperature curve

Technical Field

The invention relates to the technical field of cleaning products, in particular to a detergent with a viscosity-temperature curve having a maximum value.

Background

The common washing products comprise liquid detergent, liquid laundry detergent, liquid soap and the like, and the viscosity control of the washing products is always an important link. In general, most washing products have a viscosity that increases sharply with decreasing temperature, which tends to make consumers feel thin in summer and sticky in winter, resulting in difficulty in using the products, and also tends to cause misunderstanding of the quality of the products by consumers.

At present, the fluctuation of the viscosity of a washing product along with the temperature can be relieved by adding functional molecules (novel viscosity conditioner for liquid soap or tableware detergent, zhang Huiwen, chinese washing product industry, no. 2 in 2020, pages 55-57) and the like, but the problem of excessively high viscosity of the washing product at low temperature can not be fundamentally solved.

Disclosure of Invention

The invention aims to provide a detergent with a maximum viscosity-temperature curve, which has the maximum viscosity-temperature curve and can solve the problem of overhigh viscosity of the traditional washing product under the low-temperature condition from the source.

In order to achieve the above object, the present invention provides the following technical solutions:

the invention provides a detergent with a maximum viscosity-temperature curve, which comprises the following components:

2 to 30 weight percent of first anionic surfactant, 0 to 15 weight percent of second anionic surfactant, 0 to 20 weight percent of amphoteric surfactant, 0 to 20 weight percent of nonionic surfactant, 0.5 to 2.5 weight percent of inorganic salt thickener, 0.01 to 10 weight percent of auxiliary agent, pH value regulator and the balance of water; wherein the content of the pH value regulator is based on the pH value of the detergent being 4.0-12.0;

the first anionic surfactant is at least one of fatty alcohol polyoxyethylene ether sulfate and alkenyl sulfonate;

the second anionic surfactant is one or more of linear alkylbenzene sulfonate, alkyl sulfate, secondary alkyl sulfonate, alcohol ether carboxylate, grease ethoxylate sulfonate, fatty acid methyl ester sulfonate and fatty acid salt;

the total mass of the first anionic surfactant, the second anionic surfactant, the nonionic surfactant and the amphoteric surfactant is recorded as the total mass of active substances, and when the active substances contain linear alkylbenzene sulfonate, the mass of the linear alkylbenzene sulfonate is less than 6% of the total mass of the active substances; when the active material contains alkyl sulfate, the mass of the alkyl sulfate is less than 70% of the total mass of the active material; when the active material contains a secondary alkyl sulfonate, the mass of the secondary alkyl sulfonate is less than 20% of the total mass of the active material.

Preferably, the amphoteric surfactant is one or more of alkyl betaine, lauramidopropyl betaine, cocoamidopropyl hydroxysulfobetaine, cocoamidopropyl dimethylamine oxide, dodecyl dimethylamine oxide, alkyl imidazoline, lauroyl amphoacetate, cocoyl glycinate, cocoyl alaninate, lauroyl glutamate and lauroyl sarcosinate.

Preferably, the content of the amphoteric surfactant is 0.5 to 10wt%.

Preferably, the nonionic surfactant comprises one or more of fatty alcohol polyoxyethylene ether, isomeric alcohol polyoxyethylene ether, alkyl glycoside, fatty acid methyl ester ethoxylate, grease ethoxylate, coconut oil monoethanolamide and coconut oil diethanolamide.

Preferably, the nonionic surfactant is present in an amount of 0.5 to 10wt%.

Preferably, the inorganic salt thickener comprises one or more of sodium chloride, potassium chloride, calcium chloride, magnesium chloride, aluminum chloride, ammonium chloride, sodium carbonate, sodium sulfate, sodium citrate, sodium silicate, sodium metasilicate and sodium hydroxide.

Preferably, the pH of the detergent is 7.0 to 9.0.

Preferably, the maximum temperature of the detergent is 0 to 25 ℃.

Preferably, the detergent has a maximum viscosity of greater than 1000 mpa.s.

Preferably, the detergent has a maximum viscosity of 5000 to 10000mpa·s.

The invention provides a detergent with a maximum viscosity-temperature curve. The invention adopts specific components and controls the content of each component, so that the viscosity-temperature curve of the detergent has a maximum value, the problem of overhigh viscosity under the low-temperature condition of the traditional washing product can be solved from the source, and the invention has very wide application prospect.

Drawings

FIG. 1 is a viscosity-temperature curve of the detergents of examples 1 to 3 and comparative examples 1 to 2;

FIG. 2 is a photograph of the detergents of examples 2 to 3 and comparative examples 1 to 2 at 0 ℃;

FIG. 3 is a graph showing the viscosity temperature curves of the detergents of examples 4 to 5 and comparative examples 3 to 4;

FIG. 4 shows the viscosity-temperature curves of the detergents of examples 6 to 7 and comparative example 5.

Detailed Description

the first anionic surfactant is at least one of fatty alcohol polyoxyethylene ether sulfate (AES) and alkenyl sulfonate (AOS);

the second anionic surfactant is one or more of Linear Alkylbenzene Sulfonate (LAS), alkyl sulfate (SDS), secondary Alkyl Sulfonate (SAS), alcohol Ether Carboxylate (AEC), grease ethoxylate sulfonate (SNS-80), fatty acid Methyl Ester Sulfonate (MES) and fatty acid salt;

the total mass of the first anionic surfactant, the second anionic surfactant, the nonionic surfactant and the amphoteric surfactant is recorded as the total mass of the active substance, and when the active substance contains Linear Alkylbenzene Sulfonate (LAS), the mass of the Linear Alkylbenzene Sulfonate (LAS) is less than 6% of the total mass of the active substance; when an active material contains alkyl sulfate (SDS), the mass of the alkyl sulfate (SDS) is less than 70% of the total mass of the active material; when the active material contains a Secondary Alkyl Sulfonate (SAS), the mass of the Secondary Alkyl Sulfonate (SAS) is less than 20% of the total mass of the active material.

The viscosity-temperature curve of the detergent provided by the invention has a maximum value, the viscosity-temperature curve is concretely a viscosity-temperature curve, the viscosity-temperature curve with the maximum value is parabolic (the viscosity has the maximum value), namely, the viscosity rises and then falls along with the temperature reduction, and the viscosity is not a curve in which the conventional viscosity monotonically increases along with the temperature reduction. The appearance of the maximum viscosity is the viscosity-temperature characteristic of the detergent with a specific formula, namely, the viscosity is reduced due to precipitation caused by the reduction of the solubility of the raw materials under the non-low temperature condition due to the comprehensive factors of micelle morphology, molecular thermal motion, hydrogen bond and the like. The invention adopts specific composition and controls the content of each component, so that the viscosity-temperature curve of the detergent has maximum value, the problem of overhigh viscosity under the condition of low temperature of the traditional washing product can be solved from the source, and the invention has very wide application prospect.

The detergent according to the invention comprises from 2 to 30wt%, preferably from 5 to 15wt% of the first anionic surfactant. In the present invention, the first anionic surfactant is at least one of fatty alcohol polyoxyethylene ether sulfate (AES) and alkenyl sulfonate (AOS), preferably AES or AOS. In the present invention, the first anionic surfactant functions to provide a basic micellar environment having a maximum viscosity-temperature curve; the invention adopts the first anionic surfactant of the type, and has good formula compatibility and high-low temperature stability on the basis of providing a basic micelle environment.

The detergent according to the invention comprises from 0 to 15wt%, preferably from 0.5 to 10wt%, more preferably from 1.5 to 3.5wt% of the second anionic surfactant. The present invention preferably employs an appropriate amount according to the kind of the second anionic surfactant to ensure that the viscosity-temperature curve of the detergent has a maximum. In the present invention, the second anionic surfactant is one or more of Linear Alkylbenzene Sulfonate (LAS), alkyl sulfate (SDS), secondary Alkyl Sulfonate (SAS), alcohol Ether Carboxylate (AEC), grease ethoxylate sulfonate (SNS-80), fatty acid Methyl Ester Sulfonate (MES) and fatty acid salt, preferably one or more of LAS, SDS, SAS and SNS-80, and specifically may be LAS, SDS or SAS, or may be a mixture of SDS and SNS-80; taking the total mass of the first anionic surfactant, the second anionic surfactant, the nonionic surfactant and the amphoteric surfactant as the total mass of active substances, when LAS is contained in the active substances, the mass of LAS is less than 6 percent, preferably 2 to 4 percent of the total mass of the active substances; when the active substance contains SDS, the mass of the SDS is less than 70% of the total mass of the active substance, preferably 5-30%; when SAS is contained in the active material, the mass of the SAS is less than 20% of the total mass of the active material, preferably 5 to 10%. In the invention, the second anionic surfactant has the function of being compounded and synergistic with the first anionic surfactant; the present invention preferably employs a second anionic surfactant of the type and in an amount described above, which is advantageous for enhancing the surface activity.

The detergent of the present invention comprises 0 to 20wt%, preferably 0.5 to 10wt%, more preferably 0.5 to 2wt% of the amphoteric surfactant. In the present invention, the amphoteric surfactant is preferably one or more of alkyl betaine, lauramidopropyl betaine (LAB), cocamidopropyl betaine (CAB), cocamidopropyl hydroxysulfobetaine (CSB), cocamidopropyl dimethylamine Oxide (OA), dodecyldimethylamine Oxide (OB), alkyl imidazoline, lauroyl amphoacetate (LG-30), cocoyl glycinate (YCK), cocoyl Alaninate (ACS), lauroyl glutamate (ULS) and lauroyl sarcosinate (S-12), more preferably LAB, CAB, YCK, OB or CSB. The invention preferably adopts the amphoteric surfactant of the type, and has the function of being compounded and synergistic with the first anionic surfactant; meanwhile, the content of the amphoteric surfactant is preferably controlled to be 0.5-2 wt%, so that the system is milder and is easy to thicken to a proper viscosity.

The detergent according to the invention comprises from 0 to 20% by weight, preferably from 0.5 to 4% by weight, of nonionic surfactant. In the present invention, the nonionic surfactant preferably includes one or more of fatty alcohol polyoxyethylene ether (AEO), isomeric alcohol polyoxyethylene ether (TO 8), alkyl glycoside (APG), fatty acid methyl ester ethoxylate (FMEE), fatty oil ethoxylate (SOE), coconut Monoethanolamide (CMEA) and Coconut Diethanolamide (CDEA), specifically, APG, AEO, TO, SOE or CMEA, or a mixture of AEO and CMEA, wherein the mass ratio of AEO TO CMEA in the mixture of AEO and CMEA is preferably (2-3): (0.4 to 0.6), more preferably 2.5:0.5; the AEO preferably includes AEO3, AEO7 or AEO9 depending on the number of ethylene oxide adducts. The nonionic surfactant of the type is preferably adopted, and the nonionic surfactant has the function of compounding and synergistic interaction with the first anionic surfactant; meanwhile, the content of the nonionic surfactant is preferably controlled to be 0.5-4wt%, so that better sebum stain removing capability is provided.

The detergent of the present invention comprises 0.5 to 2.5wt%, preferably 0.7 to 2.0wt%, more preferably 1.0 to 1.5wt% of an inorganic salt thickener. In the present invention, the inorganic salt thickener preferably includes one or more of sodium chloride, potassium chloride, calcium chloride, magnesium chloride, aluminum chloride, ammonium chloride, sodium carbonate, sodium sulfate, sodium citrate, sodium silicate, sodium metasilicate, and sodium hydroxide, more preferably sodium chloride, potassium chloride, or sodium sulfate. In the detergent provided by the invention, the high molecular polymer is not adopted for thickening, and the surfactant is adopted for self-thickening in the pH ranges of the metaacidity and the neutrality (pH=5-7), but the inorganic salt thickener is adopted, so that the inorganic salt thickener has strong adaptability to the pH, can thicken under the conditions of neutrality and the alkalescence (pH=7-9), has strong detergency of the surfactant under the conditions of neutrality and the alkalescence, and is more stable in product; meanwhile, the content of the inorganic salt thickener is controlled to be 0.5-2.5 wt%, and the thickener can be effectively thickened on the basis of not exceeding the maximum thickening value of the inorganic salt, thereby being beneficial to the stability of the product at low temperature.

The detergent of the present invention comprises 0.01 to 10wt%, preferably 0.5 to 5wt%, more preferably 1.2 to 2.5wt%, still more preferably 1.7 to 2.0wt% of an auxiliary agent. In the present invention, the auxiliary agent preferably includes one or more of triethanolamine, enzyme, essence, pigment, chelating agent, and preservative, more preferably essence, pigment, and chelating agent. In the present invention, the content of the perfume, the pigment and the chelating agent in the detergent is preferably independently 0.1 to 0.3wt%, more preferably 0.15 to 0.25wt%, still more preferably 0.15 to 0.2wt%.

The detergent of the present invention comprises a pH adjustor contained in an amount such that the pH of the detergent is 4.0 to 12.0. In the present invention, the pH adjustor is preferably an aqueous sodium hydroxide solution or an aqueous citric acid solution, and the concentration of the aqueous sodium hydroxide solution and the aqueous citric acid solution is preferably 8 to 12wt% independently, more preferably 10wt%.

The detergent of the present invention includes the balance of water.

The pH of the detergent of the present invention is 4.0 to 12.0, preferably 6.0 to 10.0, more preferably 7.5 to 9.0, and even more preferably 8.0 to 8.5.

The maximum temperature of the detergent in the present invention is preferably 0 to 25 ℃, more preferably 5 to 19 ℃, still more preferably 8 to 15 ℃, still more preferably 9 to 12 ℃, still more preferably 10 to 11 ℃. In the present invention, the maximum temperature of the detergent is a temperature corresponding to the maximum viscosity of the detergent.

The maximum viscosity of the detergent of the present invention is preferably more than 1000 mPas, more preferably 5000 to 10000 mPas.

In the invention, when the content of the amphoteric surfactant and the nonionic surfactant is 0, the anionic surfactant is a mixture of a first anionic surfactant and a second anionic surfactant, namely the active substance is a mixture of the first anionic surfactant and the second anionic surfactant; specifically, the active substance is preferably a mixture of AES, SDS and SNS-80, and the mass of SDS is less than 70% of the total mass of the active substance, preferably 5 to 50%, more preferably 10 to 30%, still more preferably 13 to 20%; specifically, the mass ratio of AES, SDS to SNS-80 is preferably 15: (2.5-3.5): (0.4 to 0.6), more preferably 15:3:0.5; the content of the active material in the detergent is preferably 17.5 to 19.5wt%, more preferably 18 to 19wt%, and still more preferably 18.5wt%.

In the present invention, when the content of the amphoteric surfactant and the nonionic surfactant is different from each other, the anionic surfactant is a mixture of the first anionic surfactant and the second anionic surfactant, or is the first anionic surfactant, and is 0. This will be specifically described below.

In the present invention, when the content of the amphoteric surfactant is 0 and the content of the nonionic surfactant is not 0, the anionic surfactant is preferably a first anionic surfactant, that is, the active substance is a mixture of the first anionic surfactant and the nonionic surfactant; specifically, the active substance is preferably a mixture of AES, AEO and CMEA, and the mass ratio of AES, AEO to CMEA is preferably 12: (2-3): (0.4 to 0.6), more preferably 12:2.5:0.5; the content of the active material in the detergent is preferably 14 to 16wt%, more preferably 14.5 to 15.5wt%, and still more preferably 15wt%.

In the present invention, when the content of the nonionic surfactant is 0 and the content of the amphoteric surfactant is not 0, the anionic surfactant is preferably a first anionic surfactant, that is, the active material is a mixture of the first anionic surfactant and the amphoteric surfactant; specifically, the active substance is preferably a mixture of AES, LAB and LG-30, and the mass ratio of the AES, LAB to the LG-30 is preferably 14: (2-3): (0.4 to 0.6), more preferably 14:2.5:0.5; the content of the active material in the detergent is preferably 16 to 18wt%, more preferably 16.5 to 17.5wt%, and still more preferably 17wt%.

In the present invention, when the content of the amphoteric surfactant and the nonionic surfactant is not 0, the anionic surfactant may be a mixture of the first anionic surfactant and the second anionic surfactant, or may be a mixture of the first anionic surfactant, the second anionic surfactant, the amphoteric surfactant and the nonionic surfactant, or may be a mixture of the first anionic surfactant, the amphoteric surfactant and the nonionic surfactant.

In the present invention, when the active substance is a first anionic surfactant, preferably AES or AOS, an amphoteric surfactant, preferably LAB, CAB, OB, CSB, or an amino acid surfactant, preferably YCK, or a mixture of nonionic surfactants, preferably APG, AEO, TO or SOE; the mass ratio of the first anionic surfactant, the amphoteric surfactant and the nonionic surfactant is preferably (12 to 13): (1-4.5): (0.4 to 2), more preferably (12 to 13): (1.5-4): (0.5 to 1.5), the content of the active substance in the detergent is preferably 14 to 16wt%, more preferably 14.5 to 15.5wt%, and still more preferably 15wt%. In the present invention, specifically, the active material may be a mixture of AES, LAB and APG, and the mass ratio of AES, LAB to APG is preferably 12: (2.5-3.5): (0.4 to 0.6), more preferably 12:2.5:0.5; alternatively, the active substance may be a mixture of AOS, CAB and AEO, the mass ratio of AOS, CAB to AEO preferably being 12: (1.5-2.5): (0.8 to 1.2), more preferably 12:2:1, a step of; alternatively, the active substance may be a mixture of AES, YCK and APG, and the mass ratio of AES, YCK to APG is preferably 12: (1-2): (1-2), more preferably 12:1.5:1.5; alternatively, the active substance may be a mixture of AES, OB and TO8, and the mass ratio of AES, OB TO8 is preferably 12: (3.5-4.5): (0.4 to 0.6), more preferably 12:4:0.5; the active substance can also be a mixture of AES, CSB and SOE, the mass ratio of AES, CSB to SOE preferably being 13: (2.5-3.5): (0.4 to 0.6), more preferably 13:3:0.5.

in the present invention, when the active material is a first anionic surfactant, a second anionic surfactant, an amphoteric surfactant, and a mixture of nonionic surfactants, the first surfactant is preferably AES or AOS, the second anionic surfactant is preferably SDS, LAS or SAS, the amphoteric surfactant is preferably LAB, CAB or YCK, and the nonionic surfactant is preferably APG or AEO. In the present invention, when the second anionic surfactant is SDS, the mass of SDS is less than 70% of the total mass of the active material, preferably 0.5 to 60%, more preferably 5 to 50%, still more preferably 10 to 40%; when the second anionic surfactant is LAS, the mass of LAS is less than 10%, preferably 0.5 to 5%, further preferably 1 to 3% of the total mass of the active material; when the second anionic surfactant is SAS, the mass of SAS is less than 20% of the total mass of the active material, preferably 0.5 to 15%, more preferably 5 to 10%. In the present invention, the content of the active material in the detergent is preferably 14 to 16wt%, more preferably 14.5 to 15.5wt%, and still more preferably 15wt%. In the present invention, specifically, the active substance may be a mixture of AES, SDS, LAB and APG, and the mass ratio of AES, SDS, LAB to APG is preferably (6 to 10.5): (1.5-6): 2.5:0.5, more preferably 10.5:1.5:2.5:0.5 or 6:6:2.5:0.5; alternatively, the active material may be a mixture of AOS, LAS, CAB and AEO, the mass ratio of AOS, LAS, CAB to AEO being preferably 11.55: (0.35-0.55): (1.5-2.5): (0.8 to 1.2), more preferably 11.55:0.45:2:1, a step of; alternatively, the active substance may be a mixture of AES, SAS, YCK and APG, the mass ratio of AES, SAS, YCK to APG preferably being 10.5: (1-2): (1-2): (1-2), more preferably 10.5:1.5:1.5:1.5.

the invention provides a preparation method of the detergent, which comprises the following steps:

the components of the detergent are mixed to obtain the detergent.

In the present invention, the mixing is preferably performed under heating conditions, and the temperature of the heating is preferably 35 to 45 ℃, more preferably 40 ℃. In the embodiment of the invention, a part of deionized water is added into a container, the container is heated to 35-45 ℃, each active substance is added into the container, after each active substance is added, the container is mechanically stirred until the container is uniform and transparent, a pH value regulator is used for regulating the container to a target pH value, then an inorganic salt thickener and an auxiliary agent are added, deionized water is added to 100wt% and the container is stirred until the container is uniform and transparent, and the detergent is obtained. In the present invention, the partial deionized water preferably accounts for 60-90% of the total mass of the deionized water. In the invention, after the pH value is regulated by the pH value regulator, the inorganic salt thickener, the auxiliary agent and the additional deionized water are added, so that the change of the pH value of the system is very small and negligible, the pH value is conveniently regulated before the inorganic salt thickener is added, and the viscosity of the system is increased after the inorganic salt thickener is added, thereby being unfavorable for regulating the pH value.

The technical solutions of the present invention will be clearly and completely described in the following in connection with the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Examples 1 to 3 and comparative examples 1 to 2

Adding a part of deionized water into a container, heating to 40 ℃, adding various surfactants into the container according to the formulation direction in table 1, mechanically stirring each surfactant until the surfactant is uniform and transparent after adding, adjusting the pH value to a target pH value by using 10wt% concentration sodium hydroxide solution or 10wt% concentration citric acid solution, adding an inorganic salt thickener (specifically sodium chloride), stirring until the inorganic salt thickener is uniform and transparent, adding essence, preservative and chelating agent, adding deionized water until the deionized water is 100wt%, and stirring until the inorganic salt thickener is uniform and transparent, thus obtaining the detergent.

The newly prepared detergent is stored in a closed state for a day to sufficiently remove bubbles therein and avoid the accuracy of viscosity measurement, then the viscosity of the detergent at different temperatures is tested, and a viscosity-temperature curve is drawn, and the results are shown in table 1 and fig. 1.

Table 1 formulations of detergents and performance test results in examples 1 to 3 and comparative examples 1 to 2

Note that: the viscosities in examples 1 to 3 were maximum viscosities, and the viscosities in comparative examples 1 to 2 were viscosities at 5 ℃.

As is clear from Table 1 and FIG. 1, the viscosity-temperature curves of the detergents in examples 1 to 3 have maximum values, whereas the detergents in comparative examples 1 to 2 do not.

Fig. 2 is a photograph of the detergents of examples 1 to 3 and comparative examples 1 to 2 at 0 c, and examples 2, example 3, comparative example 1 and comparative example 2 are shown in this order from left to right. As is clear from FIG. 2, since SDS is easily precipitated at low temperature, the viscosity-temperature curves of the detergents of comparative examples 1 and 2 in FIG. 1 are stopped when they are measured only at 3℃and are not continued under lower temperature conditions.

Examples 4 to 5 and comparative examples 3 to 4

Detergents were prepared according to the formulations in table 2 and tested for performance according to the method of example 1, as described in table 2 and fig. 3. As can be seen from Table 2 and FIG. 3, the viscosity-temperature curves of the detergents in examples 4 to 5 have maximum values, whereas the detergents in comparative examples 3 to 4 have no values.

Table 2 formulas and performance test results of detergents in examples 4 to 5 and comparative examples 3 to 4

Note that: the viscosities in examples 4 to 5 were maximum viscosities, and the viscosities in comparative examples 3 to 4 were viscosities at 5 ℃.

Examples 6 to 7 and comparative examples 5 to 6

Detergents were prepared according to the formulations in table 3 and tested for performance according to the method of example 1, as described in table 3 and fig. 4. As is clear from Table 3 and FIG. 4, the viscosity-temperature curves of the detergents in examples 6 to 7 have maximum values, whereas the detergents in comparative examples 5 to 6 have no maximum values.

Table 3 formulations of detergents and results of Performance test in examples 6 to 7 and comparative examples 5 to 6

Note that: the viscosities in examples 6 to 7 were maximum viscosities, and the viscosities in comparative examples 5 to 6 were viscosities at 5 ℃.

Examples 8 to 11

Detergents were prepared according to the formulations in table 4 and tested for performance according to the method of example 1, as shown in table 4. As is clear from Table 4, the viscosity-temperature curves of the detergents in examples 8 to 11 have maximum values. Further analysis shows that the addition amount of different inorganic salts only affects the viscosity of the detergent and does not affect the maximum rule or the maximum temperature.

Table 4 formulations of detergents and results of Performance tests in examples 8 to 11

Recipe and performance test results	Example 8	Example 9	Example 10	Example 11
					AES(wt％)	12	12	12	12
OB(wt％)	4	4	4	4
					TO8(wt％)	0.5	0.5	0.5	0.5
Sodium chloride (wt%)	0.5	1	1.5	2
					Essence (wt%)	0.2	0.2	0.2	0.2
Preservative (wt%)	0.2	0.2	0.2	0.2
					Chelating agent (wt%)	0.3	0.3	0.3	0.3
Deionized water (wt%)	To 100	To 100	To 100	To 100
					pH value of	8.0	8.0	8.0	8.0
Whether the viscosity-temperature curve has a maximum value	Has the following components	Has the following components	Has the following components	Has the following components
					Maximum temperature (. Degree. C.)	10	12	11	10
Maximum viscosity (mPa. S)	196	5352	44640	148800

Examples 12 to 16

Detergents were prepared according to the formulations in table 5 and tested for performance according to the method of example 1, as shown in table 5. As is clear from Table 5, the viscosity-temperature curves of the detergents in examples 12 to 16 have maximum values. Further analysis shows that different pH values only affect the viscosity of the detergent and do not affect the maximum rule or the maximum temperature.

Table 5 formulations of detergents and results of Performance tests in examples 12 to 16

Examples 17 to 19

Detergents were prepared according to the formulations in table 6 and tested for performance according to the method of example 1, as shown in table 6. As is clear from Table 6, the viscosity-temperature curves of the detergents in examples 17 to 19 have maximum values. And further analysis shows that amphoteric or nonionic surfactants are not a requirement for the viscosity-temperature profile of the detergent to have a maximum, as shown in example 17, the viscosity-temperature profile of a particular formulation of detergent may have a maximum even in the absence of zwitterionic surfactant; as shown in example 18, the viscosity-temperature curve of a particular formulation of detergent may have a maximum even in the absence of a nonionic surfactant; as also shown in example 19, the viscosity temperature profile of a particular formulation of detergent can have a maximum even in the absence of amphoteric and nonionic surfactants.

Table 6 formulations of detergents and results of Performance tests in examples 17 to 19

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. A detergent having a viscosity-temperature curve with a maximum comprising the following components:

2-30wt% of a first anionic surfactant, 0-15wt% of a second anionic surfactant, 0.5-20wt% of an amphoteric surfactant, 0.5-20wt% of a nonionic surfactant, 0.5-2.5wt% of an inorganic salt thickener, 0.01-10wt% of an auxiliary agent, a pH value regulator and the balance water; wherein the content of the pH value regulator is based on the pH value of the detergent being 4.0-12.0;

the total mass of the first anionic surfactant, the second anionic surfactant, the nonionic surfactant and the amphoteric surfactant is recorded as the total mass of the active substances, and when the active substances contain linear alkylbenzene sulfonate, the mass of the linear alkylbenzene sulfonate is less than 3% of the total mass of the active substances; when the active material contains alkyl sulfate, the mass of the alkyl sulfate is less than 40% of the total mass of the active material; when the active material contains a secondary alkyl sulfonate, the mass of the secondary alkyl sulfonate is less than 10% of the total mass of the active material;

the amphoteric surfactant is one or more of alkyl betaine, lauramidopropyl betaine, cocamidopropyl hydroxysulfobetaine, cocamidopropyl dimethylamine oxide, dodecyl dimethylamine oxide, alkyl imidazoline and lauroyl amphoacetate;

the maximum viscosity of the detergent is 5000-10000 mPas.

2. The detergent according to claim 1, wherein the content of the amphoteric surfactant is 0.5 to 10wt%.

3. The detergent of claim 1, wherein the nonionic surfactant comprises one or more of fatty alcohol polyoxyethylene ether, isomeric alcohol polyoxyethylene ether, alkyl glycoside, fatty acid methyl ester ethoxylate, grease ethoxylate, coconut monoethanolamide and coconut diethanolamide.

4. A detergent as claimed in claim 1 or 3, characterised in that the nonionic surfactant is present in an amount of 0.5 to 10wt%.

5. The detergent of claim 1, wherein the inorganic salt thickener comprises one or more of sodium chloride, potassium chloride, calcium chloride, magnesium chloride, aluminum chloride, ammonium chloride, sodium carbonate, sodium sulfate, sodium citrate, sodium silicate, sodium metasilicate, and sodium hydroxide.

6. The detergent according to claim 1, wherein the pH of the detergent is 7.0 to 9.0.

7. The detergent according to claim 1, wherein the maximum temperature of the detergent is 0-25 ℃.