A detergent composition

Abstract

The invention relates to the technical field of daily chemical washing products, in particular to a detergent composition. The detergent comprises the following components in weight percentage: 1% to 6% fatty acid, 15% to 35% anionic surfactant, 8% to 35% nonionic surfactant, 0.1% to 6% high boiling point solvent, 0.1% to 8.0% auxiliary agent, and the remainder of soft water. The composition is a special detergent suitable for automatic washing machines, and has excellent low viscosity performance at low temperatures. The detergent composition has the characteristic of not gelling in a high temperature non-enclosed environment.

Description

Technical Field

[0001] The invention relates to the technical field of daily chemical cleaning products, and in particular to a detergent composition. Background Art

[0002] At present, there are two main ways to put laundry detergent into washing machines, namely manual and automatic. Manual dispensing is a traditional dispensing method. The dispensing amount is not accurate, the dispensing process is also complicated, and the skin of the hands will be stained with detergent. Automatic dispensing is an intelligent dispensing method. It can determine the amount of detergent to be added according to factors such as the weight of the clothes to be washed and the amount of water. There is no need to add detergent manually, but the current popularity rate is not high. To achieve accurate dispensing, automatic dispensing has high requirements for the active matter, viscosity, and gelation of the detergent. The amount of ordinary laundry detergent used each time is generally 30g. According to the use cycle of 2 months, the automatic dispensing box of the washing machine needs to accommodate 1800g of laundry detergent, which will occupy a large space. Due to the limited space of the washing machine, ordinary laundry detergent needs to be concentrated to reduce the space occupied by the detergent. In order to achieve accurate dispensing, the viscosity of the automatic dispensing detergent needs to be kept low at different temperatures, while the viscosity of ordinary laundry detergent fluctuates widely due to the influence of temperature, and is not suitable for automatic dispensing washing machines. There will be detergent residue at the automatic dispensing outlet of the washing machine. The residual laundry detergent is easy to evaporate and lose water to produce gel in a non-enclosed environment. This situation often occurs at the laundry detergent dispensing outlet of ordinary washing machines. The gel will block the automatic dispensing outlet, making dispensing inaccurate. Some washing machines have a built-in high-temperature drying function. The high temperature environment not only makes it easier for the detergent to lose water and form gel, but also other ingredients in the detergent are easy to precipitate, such as certain polymers, salts, etc., affecting the user experience.

[0003] CN 109898281 B discloses a clothing treatment device, which effectively solves the problem of cleaning residual additives in an automatic dispensing device, can effectively remove residual additives, and reasonably discharge wastewater generated by cleaning the automatic dispensing device. The device can solve the problem of detergent residue, but the pipeline of the automatic dispensing liquid cannot be cleaned, and the detergent still faces the problem of high-temperature water loss. In view of this special usage scenario, it is of great significance to develop a special detergent suitable for automatic dispensing washing machines. Summary of the invention

[0004] In order to overcome the shortcomings and deficiencies of the prior art, the present invention provides a detergent composition, which is a concentrated laundry detergent suitable for automatic washing machines, has low and stable viscosity at different temperatures, and can prevent gelation even when the detergent composition continuously loses water in a non-enclosed high-temperature environment.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A detergent composition, calculated by weight percentage, is made from the following components:

[0007] Fatty acids 1.0% to 6.0%;

[0008] Anionic surfactant 15.0% to 35.0%;

[0009] Nonionic surfactant 8.0% to 35.0%;

[0010] High boiling point solvent 0.1% to 6.0%;

[0011] Additives 0.1%~8.0%;

[0012] Soft water balance.

[0013] The fatty acid selected by the present invention is a carboxylic acid, and its long aliphatic tail chain is a saturated or unsaturated straight chain. The fatty acid is compounded by at least two of C8-C18 straight chain fatty acids.

[0014] In the present invention, the anionic surfactant refers to a composition of linear alkylbenzene sulfonate ethanolamine salt and ethoxylated fatty alcohol sulfate.

[0015] The weight percentage of the linear alkylbenzene sulfonate ethanolamine salt in the detergent composition is 10.0% to 25.0%, and the weight percentage of the ethoxylated fatty alcohol sulfate in the detergent composition is 5.0% to 15.0%.

[0016] The ethoxylated fatty alcohol sulfate has the following general formula: R1-O-EOx-SO3M

[0017]

[0018] Wherein, R1 is a linear or branched alkyl or alkenyl group with 6 to 18 carbon atoms, which may be a saturated alkyl group or an alkyl group containing one or more unsaturated double bonds. EO is ethylene dioxide, x represents the average addition number, x=1 or 3, and M is an alkali metal.

[0019] In the present invention, the nonionic surfactant is fatty alcohol alkoxylate.

[0020] The fatty alcohol alkoxylate has the following general formula: RO-EOm-POn-H;

[0021]

[0022] Wherein, R is a linear or branched alkyl or alkenyl group with 6 to 18 carbon atoms, which may be a saturated alkyl group or an alkenyl group containing one or more unsaturated double bonds. EO is ethylene dioxide, PO is propylene dioxide, EO and PO are combined randomly or in blocks, m and n represent the average addition number, m is 0 to 10, and n is 0.5 to 10.

[0023] The high boiling point solvent described in the present invention refers to a solvent having a boiling point higher than 145° C. (at one standard atmospheric pressure).

[0024] The high boiling point solvent is selected from two composites of propylene glycol, 3-methoxy-3-methyl-1-butanol and dipropylene glycol methyl ether.

[0025] The auxiliary agent is selected from at least one of a preservative, a colorant, an enzyme preparation, a flavor, a fluorescent whitening agent and a pH regulator.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention selects suitable fatty acids, surfactants and high-boiling point solvents for compounding in a reasonable composition ratio, and the prepared detergent composition has a viscosity controlled within the range of 100 mPa·s to 1000 mPa·s at room temperature and a pH value range of 7.0 to 8.5. The detergent composition has anti-gelling performance under high temperature and non-enclosed environment, and has excellent low-viscosity performance at low temperature.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description, which will become obvious from the following description, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1 This is a diagram showing the effect of AES aqueous solution losing water to form gel at high temperature.

[0031] Figure 2 This is a diagram showing the effect of NES aqueous solution remaining clear when losing water at high temperature. DETAILED DESCRIPTION

[0032] In order to more fully understand the technical content of the present invention, the present invention will be further introduced and illustrated in conjunction with the accompanying drawings and specific embodiments below; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0033] For those skilled in the art, the features, benefits and advantages of the present invention will become apparent by reading the contents disclosed in this specification.

[0034] Unless otherwise indicated, all percentages, parts and ratios are calculated based on the total weight of the composition of the present invention. The term "weight content" may be represented herein by the symbol "%".

[0035] As used herein, "includes," "comprising," "including," "containing," "having," or other variations are intended to encompass non-exclusive inclusions, and no distinction is made between these terms. The term "comprising" means that other steps and ingredients that do not affect the end result may be added. The term "comprising" also includes the terms "consisting of" and "consisting essentially of." The compositions and methods / processes of the present invention may comprise, consist of, and consist essentially of the essential elements and limitations described herein, as well as any additional or optional ingredients, components, steps, or limitations described herein.

[0036] fatty acid

[0037] In the present invention, the fatty acid in the composition is a compound of at least two of C8-C18 straight-chain fatty acids, more preferably a compound of oleic acid and lauric acid, or a compound of oleic acid and coconut oil acid.

[0038] More preferably, the ratio of oleic acid to lauric acid is 2:1 to 5:1; the ratio of oleic acid to coconut oleic acid is 2:1 to 5:1.

[0039] The fatty acid preferably accounts for 1% to 6% of the detergent composition, and more preferably accounts for 3%.

[0040] Anionic surfactants

[0041] In the present invention, the anionic surfactant is a combination of linear alkylbenzene sulfonate ethanolamine salt and ethoxylated fatty alcohol sulfate.

[0042] Furthermore, the linear alkylbenzenesulfonate ethanolamine salt in the present invention is a complex of linear alkylbenzenesulfonic acid and ethanolamine.

[0043] Furthermore, the weight percentage of the linear alkylbenzenesulfonate ethanolamine salt in the detergent composition of the present invention is 10.0% to 25.0%, and the further preferred percentage is 12.0%.

[0044] In the present invention, the ethoxylated fatty alcohol sulfate has the following general formula: R1-EOx-SO3M.

[0045] Wherein, R1 is a linear or branched alkyl or alkenyl group with carbon atoms of C6-C18, which can be a saturated alkyl group or an alkenyl group containing one or more unsaturated double bonds. EO is ethylene dioxide, and x represents the average addition number, where x=1, 3.

[0046] Furthermore, the ethoxylated fatty alcohol sulfate is a mixture of ethoxylated fatty alcohol sulfates with an average addition number of 1 and an average addition number of 3.

[0047] Furthermore, the weight ratio of the ethoxylated fatty alcohol sulfate with an average addition number of 1 to the ethoxylated fatty alcohol sulfate with an average addition number of 3 is 1:1 to 1:5.

[0048] Preferably, the weight ratio of the ethoxylated fatty alcohol sulfate with an average addition number of 1 to the ethoxylated fatty alcohol sulfate with an average addition number of 3 is 1:2 to 1:3.

[0049] In the present invention, the weight percentage of the ethoxylated fatty alcohol sulfate in the detergent composition is 5% to 15%, preferably 6.0% to 12%, and more preferably 6%.

[0050] In the present invention, the ethoxylated fatty alcohol sulfate is prepared by ring-opening polymerization of fatty alcohol and alkylene oxide under the action of an alkaline catalyst to obtain fatty alcohol alkoxylate, and then sulfonating the fatty alcohol alkoxylate to obtain ethoxylated fatty alcohol sulfate. By controlling the ratio of fatty alcohol and alkylene oxide, fatty alcohol polyethers with different average addition numbers can be obtained, for example, 1 mole of fatty alcohol and 1 mole of ethylene oxide can synthesize ethoxylated fatty alcohol (AEO1) with an average addition number of 1, and 1 mole of fatty alcohol and 3 moles of ethylene oxide can synthesize ethoxylated fatty alcohol (AEO3) with an average addition number of 3.

[0051] In the present invention, the ethoxylated fatty alcohol sulfate synthesis process is to mix AEO1 and AEO3 in a certain ratio, and then sulfonate the mixed fatty alcohol alkoxylate to obtain the ethoxylated fatty alcohol sulfate.

[0052] Commonly used ethoxylated fatty alcohol sulfates have special solubility and viscosity. The active matter concentration shows a gel region between 30% and 60%. It is not easy to produce gel when the active matter concentration is lower than 30% and higher than 60%. In a high-temperature open environment, the rapid volatilization of the surface water of the detergent will cause the concentration of the ethoxylated fatty alcohol sulfate to be locally too high, so that it falls into the gel region, causing the composition to produce gel (skin). The solubility of ethoxylated fatty alcohol sulfates can be improved by adjusting the alkyl chain length and the divinyl chain length. The alkyl chain length of commonly used ethoxylated fatty alcohol sulfates is generally 12 to 16, and the average divinyl addition number is 2. The ethoxylated fatty alcohol sulfate of the present invention adjusts the ratio of AEO1 and AEO3 so that the proportion of AEO3 is appropriately increased, and the degree of ethoxylation is increased to improve the solubility and narrow the gel range.

[0053] Nonionic surfactants

[0054] In the present invention, the nonionic surfactant is fatty alcohol alkoxylate.

[0055] Preferably, the nonionic surfactant in the detergent composition is a linear fatty alcohol polyoxyethylene ether and / or an isomeric fatty alcohol polyoxyethylene ether.

[0056] The fatty alcohol alkoxylate is the product of ring-opening polymerization of fatty alcohol and alkylene oxide under the action of a basic catalyst, which is basically a mixture. Fatty alcohol includes straight-chain alcohol or branched isomeric alcohol. Alkoxy groups include ethoxy groups and propoxy groups. Fatty alcohol preferably has a carbon number of 6 to 18, and preferred alcohols include but are not limited to hexanol, octanol, decanol, 2-ethylhexanol, 3-propylheptanol, lauryl alcohol, isotridecanol, tridecanol, tetradecanol, hexadecanol, palmitoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, linoleyl alcohol, one of linoleyl alcohol and mixtures thereof.

[0057] Solvents

[0058] The solvent of the present invention is a high boiling point solvent, and the boiling point of the solvent is higher than 145 degrees Celsius (under one atmosphere pressure).

[0059] Furthermore, the high boiling point solvent is selected from two composites of propylene glycol, 3-methoxy-3-methyl-1-butanol and dipropylene glycol methyl ether.

[0060] Furthermore, the high boiling point solvent is preferably a mixture of propylene glycol and dipropylene glycol methyl ether in a weight ratio of 2:1 to 4:1.

[0061] More preferably, the weight ratio of propylene glycol to dipropylene glycol methyl ether is 4:1.

[0062] The high boiling point solvent accounts for 0.1% to 6% in the detergent composition, and the preferred addition amount is 4%.

[0063] Additives

[0064] The detergent aid of the present invention comprises at least one of essence, preservative, colorant, pH regulator and fluorescent whitening agent.

[0065] The weight percentage of the detergent builder in the detergent composition is usually 0.1% to 8.0%.

[0066] preservative

[0067] In the present invention, the preservative is selected from one or more of kasone, 2-methyl-4-isothiazoline-3-one, 5-chloro-2-methyl-4-isothiazoline-3-one and bropol.

[0068] If a preservative is used, the preferred weight percentage of the preservative in the composition is 0.001% to 0.5%; the preferred addition amount is 0.02% to 0.05%.

[0069] Colorants

[0070] In the present invention, the colorant may be selected from pigments and / or dyes, and may include colorants commonly used in laundry detergents or fabric softeners.

[0071] If a colorant is used, the preferred weight percentage of the colorant in the composition is 0.0001% to 0.5%; the preferred weight percentage is 0.0001% to 0.1%.

[0072] Fluorescent brightener

[0073] The use of fluorescent whitening agents used in the present invention in liquid detergent compositions is well known in the art, and there are abundant commercial fluorescent whitening agents. The fluorescent whitening agents exist in the form of their alkali metal salts. Preferred fluorescent whitening agents include, but are not limited to, distyryl biphenyl compounds. A suitable example is 4,4-bis(2-sodium sulfonate styryl) biphenyl.

[0074] The amount of the fluorescent whitening agent used is 0.0001% to 1.0%, preferably 0.0005% to 0.1% of the total amount of the detergent composition.

[0075] Enzyme preparations

[0076] The enzyme preparation of the present invention may comprise one or more enzyme preparations to provide cleaning performance, fabric care and / or other beneficial effects. The enzyme preparation is selected from the group consisting of the following enzymes: protease, alpha-amylase, cellulase, hemicellulase, phospholipase, esterase, lipase, peroxidase / oxidase, pectinase, lyase, mannanase, cutinase, reductase, xylanase, pullulanase, tannase, pentosanase, maltase, arabinase, beta-glucanase. Commonly used enzyme preparations are protease, amylase, lipase, cutinase and / or cellulase.

[0077] The enzyme preparation is contained in an amount of 0.001% to 5%, preferably 0.01% to 2% of the detergent composition.

[0078] essence

[0079] The present invention can select suitable commercial flavors according to consumer surveys and studies, and the flavors are floral, non-floral, and fruity. Floral flavors include rose, jasmine, tuberose, lily of the valley, magnolia, clove, narcissus, sunflower, orange blossom, gardenia, hyacinth, acacia, lavender, locust flower, fragrant bamboo stone, osmanthus, violet, chrysanthemum, ylang-ylang, etc. Non-floral flavors include sandalwood, woody, powdery, musk, fantasy, various fruity, various wine-flavored, coffee, cream, vanilla, mint, almond, etc. Fruity flavors are blended to imitate the aroma of fruits, such as apple, orange, grape, strawberry, banana, cherry, lemon, pear, etc.

[0080] The fragrance is 0.1% to 5%, preferably 0.1% to 0.5% of the detergent composition.

[0081] pH Adjusters

[0082] The pH adjuster in the present invention is an organic base.

[0083] The organic base source includes, but is not limited to, primary amines, secondary amines, tertiary amines, and mixtures thereof. Other organic alkalinity sources are alkanolamines or mixtures of alkanolamines. Suitable alkanolamines may be selected from lower alkanol monoalkanolamines, dialkanolamines and trialkanolamines, such as monoethanolamine, diethanolamine or triethanolamine. Preferably, monoalkanolamines, dialkanolamines, and especially monoethanolamine may be selected.

[0084] Preferably, the amount of the organic base used in the present invention is 0.1% to 6.0%, and the preferred amount is 3%.

[0085] water

[0086] The water in the present invention is water that meets the requirements of detergent production, preferably soft water.

[0087] Preferably, the pH value (5% aqueous solution) of the detergent composition of the present invention is 7.0 to 8.5.

[0088] Application Performance Testing Methodology

[0089] 1. pH test

[0090] The test was carried out in accordance with GB / T 6368. The test temperature was 25±1°C, and the test solution (5% aqueous solution) was prepared with boiled and cooled distilled water.

[0091] 2. Active ingredient content test

[0092] Referring to the total active matter content determination method in the national standard GB 13174-2000, the active matter content was obtained by the chloroform extraction method, and the total active matter content was obtained after deducting the urea content.

[0093] 3. Viscosity test

[0094] The test was conducted using a rotational viscometer, the instrument model being Brookfield VISCOMETER. A 250 mL PET bottle was filled with an appropriate amount of sample and placed in a constant temperature environment of 4°C ± 1°C (low temperature), 25°C ± 1°C (room temperature) and 54 ± 1°C (high temperature) for more than 1 hour to ensure that the liquid in the PET bottle was at the specified test temperature. A suitable rotor was selected according to the sample viscosity range, the sample position was adjusted, and the rotor torque was adjusted between ± 1.0%. During measurement, the rotor torque was ensured to be within the range of 40% to 60%. After the indication was stable, the data was recorded and the test was stopped.

[0095] 4. National standard decontamination performance test

[0096] The test was carried out in accordance with the national standard GB / T 13174, and the selected dirty cloths were carbon black dirty cloth, sebum dirty cloth, and protein dirty cloth.

[0097] 5. Stability performance test

[0098] The cold resistance, heat resistance, freeze-thaw, and hot and cold stability of the composition were determined with reference to the liquid sample stability test method in standard QB / T 1224.

[0099] Room temperature stability: When the composition is observed at room temperature, if there is no stratification, suspended matter or precipitation, it is qualified (√), otherwise it is unqualified (×).

[0100] Cold stability: After the detergent composition is bottled and sealed, it is placed in an environment of 5±2℃ and kept at a constant temperature for 1 month. Then, it is taken out and restored to room temperature (25±5℃) for observation. If the composition does not delaminate, has no suspended matter or precipitate, it is qualified (√), otherwise it is unqualified (×).

[0101] Heat stability: After the detergent composition is bottled and sealed, it is placed in an environment of 45±1℃. After being kept at a constant temperature for 1 month, it is returned to room temperature of 25±5℃ for observation. If the composition does not delaminate, has no suspended matter or precipitate, it is judged to be qualified (√), otherwise it is unqualified (×).

[0102] Freeze-thaw cycle stability: After the detergent composition is sealed in a bottle, it is placed in an environment of -15 to -20°C, kept at a constant temperature for 24 hours, then taken out and placed in an environment at room temperature of 25±5°C for 24 hours as one cycle, and the cycle is repeated four times. After each cycle, the state of the composition is observed. If the composition does not delaminate, has no suspended matter or precipitate, it is judged as qualified (√), otherwise it is unqualified (×).

[0103] Thermal cycle stability: After the detergent composition is bottled and sealed, it is placed in an environment of -15 to -20°C, kept at a constant temperature for 24 hours, then taken out and immediately placed in an environment of 45±1°C for 24 hours as one cycle, and the cycle is repeated four times. After each cycle, the state of the composition is observed. If the composition does not separate into layers, has no suspended matter or precipitates, it is considered qualified (√), otherwise it is considered unqualified (×).

[0104] 6. Anti-gelation performance test

[0105] Weigh 60 g ± 0.5 g of the composition into a PET medical plastic bottle of 80 mL, with an opening diameter of 3 cm, a bottom diameter of 4.5 cm, and a height of about 8 cm. Place the plastic bottle in an oven with its opening open, set the oven temperature to (54 ± 1) ° C, and start timing. Weigh the plastic bottle at 0 hours, 24 hours, 48 ​​hours, and 72 hours, and immediately weigh the weight of the composition in the bottle. When the temperature of the composition drops to room temperature (25 ° C ± 1 ° C), observe whether the composition has crusting and precipitation.

[0106] 7. Rinse performance test

[0107] According to the specified amount of detergent, 8 cotton white shirts were put into the drum washing machine to test the rinsing performance. The washing machine was washed once, rinsed twice and dehydrated once according to the washing program. After the washing was completed, the foam residue in the washing machine was observed, and the foam residue was recorded (+) and the foam residue was not recorded (-).

[0108] Example

[0109] In the following examples, the present invention provides a detergent composition, and the raw materials used are described as follows:

[0110] LAS: linear alkylbenzene sulfonic acid, carbon number is 10 to 13, active matter content is 100%.

[0111] AES: Ethoxylated fatty alcohol sulfate, the carbon number of the fatty alcohol is 10 to 14, the average degree of ethoxylation is 2, the active matter content is 100%, and it is an anionic surfactant.

[0112] NES: Ethoxylated fatty alcohol sulfate, the carbon number of the fatty alcohol is 10 to 14, it is a mixture of ethoxylated fatty alcohol sulfates with an average addition number of 1 and an average addition number of 3, the weight ratio is 1:1 to 1:5, the active matter content is 100%, anionic surfactant.

[0113] AEO-9: Fatty alcohol alkoxylate, average degree of ethoxylation is 9, active matter content is 100%, non-ionic surfactant.

[0114] Plurafac lf901: methyl ethylene oxide and ethylene oxide mono(2-propylheptyl) ether, active matter content is 100%, non-ionic surfactant.

[0115] LAB: Cocamidopropyl betaine, active content 100%, amphoteric surfactant.

[0116] DPM: dipropylene glycol methyl ether.

[0117] The preparation method of the comparative example and the embodiment of the detergent composition of the present invention specifically comprises the following steps:

[0118] 1) Add soft water to the reaction kettle, heat it to 45°C to 50°C, add fatty acid and solvent, and start stirring;

[0119] 2) Add organic base to the reaction kettle and continue stirring until the fatty acid is completely dissolved;

[0120] 3) adding linear alkylbenzene sulfonic acid, ethoxylated fatty alcohol sulfate, and fatty alcohol alkoxylate to the reaction kettle, and continuing to stir until the raw materials are completely dissolved;

[0121] 4) Add additives to the reactor, continue stirring, check pH value and viscosity, and discharge the material after passing the test.

[0122] Examples 1-10 and Comparative Examples 1-7

[0123] The detergent compositions of Comparative Examples 1 to 5 were prepared according to the formulations in Table 1 below.

[0124] Table 1 Formula composition of detergent composition of comparative examples 1-5 (%)

[0125]

[0126]

[0127]

[0128] Comparative Example 1 is a conventional ordinary laundry detergent with a theoretical active matter content of about 16%. The viscosity of the formula is low and salt is required for thickening. The test results show that the viscosity of this type of laundry detergent fluctuates widely at different temperatures. In a high temperature, unsealed environment, there will be obvious gel (crusting) on ​​the surface of the composition and precipitates will appear at the bottom of the composition. Although the viscosity of the composition can be low without adding thickener salt, the composition has low active matter and the space of the automatic delivery box of the washing machine is limited, so it is not suitable for automatic delivery to the washing machine.

[0129] Comparative Example 2 is a concentrated laundry detergent with a theoretical active matter content of 32%. The formula viscosity is relatively large and does not require thickening. Solvents need to be added to reduce the viscosity. In the case of high-temperature water loss, the concentration of the thickener salt increases, which is more likely to cause the composition to thicken. Therefore, the composition preferably uses an organic base monoethanolamine to replace the inorganic base sodium hydroxide (which is easy to form sodium salt). The anti-gel performance was tested according to the method described in the present invention. The test results showed that gel was generated on the surface of Comparative Example 2 after being placed in an open environment at high temperature for 48 hours.

[0130] Since the boiling point of ethanol is 78 degrees Celsius (one standard atmospheric pressure), it is easy to volatilize at high temperature, making the formula more likely to produce gel, so the composition needs to select a high-boiling point solvent. Hand-washing laundry detergent will come into contact with the skin, and the safety of the solvent also needs to be considered. In addition to boiling point and safety, the solvent must be hydrophilic, soluble in water, and able to reduce the viscosity of the formula. However, high-boiling point solvents often have longer carbon chains (hydrophobic chains) and become hydrophobic, and the viscosity reduction of the formula is not obvious. Table 2 below lists several suitable high-boiling point solvents, and the boiling point of the solvent is higher than 145 degrees Celsius (one atmospheric pressure).

[0131] Table 2 High boiling point solvent information

[0132] Solvent type Boiling point℃ Propylene glycol 188 3-Methoxy-3-methyl-1-butanol 173～175 Dipropylene glycol methyl ether 173

[0133] Compared with Comparative Example 2, Comparative Example 3 uses high-boiling-point propylene glycol as a solvent, but the viscosity of the composition does not decrease significantly. This is because the carbon chain number of propylene glycol is higher than that of ethanol, and the effect of reducing the viscosity of the composition is limited. In the case of high-temperature water loss, Comparative Example 3 still produces gel.

[0134] In order to further prevent the composition from gelling due to high temperature dehydration, the high temperature dehydration of different surfactants at a concentration of 15% active matter was tested. The test results show that cocamidopropyl betaine (LAB) is most likely to produce gel at 54 degrees Celsius, followed by fatty alcohol alkoxylates (AEO) and ethoxylated fatty alcohol sulfates (AES), and linear alkylbenzene sulfonate ethanolamine salt is least likely to produce gel. Therefore, by optimizing the surfactant ratio in the composition, gelling can be further avoided.

[0135] Compared with Comparative Example 3, Comparative Example 4 removes cocamidopropyl betaine (LAB) which is easy to gel, and adjusts the proportion of sulfonic acid (LAS), fatty alcohol alkoxylate (AEO) and ethoxylated fatty alcohol sulfate (AES) in the composition. Compared with Comparative Examples 1-3, the anti-gel performance of the composition of Comparative Example 4 is improved. It can be placed for 48 hours at 54 degrees, but gel is generated at the 72nd hour.

[0136] The commonly used AES and the NES of the present invention were respectively prepared into aqueous solutions with an active ingredient content of 15%, and then the anti-gel performance test was performed. The results are shown in FIG. Figure 1 and Figure 2 The test results show that after 48 hours in a 54-degree Celsius oven, a circle of gel (skin) forms on the wall of the bottle containing the AES aqueous solution, while no gel (skin) forms on the wall of the bottle containing the NES aqueous solution, and the solution remains clear. This shows that NES has better anti-gel properties when losing water at high temperatures.

[0137] Compared with Comparative Example 4, Comparative Example 5 uses NES to replace the commonly used fatty ethoxylated fatty alcohol sulfate AES. The test results show that the formula of Comparative Example 5 can still remain clear after being placed in an open environment at high temperature for 72 hours, indicating that NES has a significant improvement effect on the anti-gelation of the composition. However, due to the use of long-chain solvent propylene glycol to reduce viscosity, the viscosity of the composition is higher at low temperatures, and the viscosity fluctuates more greatly compared with the viscosity at room temperature.

[0138] The detergent compositions of Examples 1 to 5 and Comparative Example 6 were prepared according to the formulations in Table 3 below.

[0139] Table 3 Formulation composition of detergent compositions of Examples 1-5 and Comparative Example 6 (%)

[0140]

[0141]

[0142]

[0143] Comparative Example 6 uses a single solvent to reduce viscosity, while Example 1 uses a combination of propylene glycol and dipropylene glycol methyl ether to reduce viscosity. Test results show that Example 1 has a viscosity range of 100 mPa·s to 1000 mPa·s at room temperature and low temperature, and has excellent low viscosity stability.

[0144] Examples 1-3 show that increasing the proportion of linear alkylbenzene sulfonate ethanolamine salt in the composition does not affect the anti-gelation performance. This is consistent with the anti-gelation results of a single surfactant, and the linear alkylbenzene sulfonate ethanolamine salt has the best anti-gelation performance. Since the color of the linear alkylbenzene sulfonate ethanolamine salt is yellowish, the color change is particularly obvious at high temperatures. The linear alkylbenzene sulfonate ethanolamine salt also affects the detergency of the composition, so the proportion of the linear alkylbenzene sulfonate ethanolamine salt in the composition is not as high as possible.

[0145] Example 4 uses a single straight-chain fatty alcohol polyoxyethylene ether, and Example 5 uses a compound of a straight-chain fatty alcohol polyoxyethylene ether and an isomeric fatty alcohol polyoxyethylene ether. The isomeric fatty alcohol polyoxyethylene ether can reduce the viscosity of the composition without affecting the anti-gelling performance of the composition.

[0146] The detergent compositions of Examples 6 to 10 and Comparative Example 7 were prepared according to the formulations in Table 4 below.

[0147] Table 4 Formula composition of detergent compositions of Examples 6-10 and Comparative Example 7 (%)

[0148]

[0149]

[0150]

[0151] The results of Comparative Example 7 show that gel will be produced when the content of NES in the composition is 20%, so the proportion of NES in the composition needs to be controlled.

[0152] The results of Examples 6-8 show that the compositions all have the property of not producing gel when losing water at high temperature. Compared with Comparative Example 7, Examples 6-8 show that the content of NES in the compositions can reach up to 15%.

[0153] Compared with Example 6, Examples 9-10 show that increasing the content of the nonionic surfactant in the composition does not affect the anti-gelling performance of the formulation, and the proportion of the nonionic surfactant in the composition can reach 35%.

[0154] According to the stability test method of the present invention, the stability of the detergent composition of Examples 1-10 was tested, as shown in Table 5. The test results show that the compositions of Examples 1-10 meet the requirements of cold resistance, heat resistance, freeze-thaw cycle, and cold and hot cycle stability.

[0155] Table 5 Stability test results

[0156]

[0157]

[0158] The detergency test was conducted according to the GB / T 13174 method, and the decontamination performance was tested by diluting the composition with water to 15% active matter according to the theoretical concentration of active matter, as shown in Table 6. The test results show that the decontamination performance of Examples 1-10 on three national standard dirty cloths is higher than that of national standard laundry detergent.

[0159] Table 6 Detergency

[0160] category Carbon black cloth Sebaceous cloth Protein stain cloth National standard laundry detergent 1.0 1.0 1.0 Example 1 1.2 1.3 2.5 Example 2 1.2 1.3 2.5 Example 3 1.2 1.3 2.5 Example 4 1.2 1.3 2.5 Example 5 1.2 1.3 2.5 Example 6 1.2 1.3 2.5 Example 7 1.2 1.3 2.5 Example 8 1.2 1.3 2.5 Example 9 1.2 1.3 2.5 Example 10 1.2 1.3 2.5

[0161] According to the rinsing performance test method of the present invention, the rinsing performance of the detergent compositions of Examples 1 to 10 was tested. The test results are shown in Table 7. After 1 washing, 2 rinsings and 1 dehydration, no foam remained in the detergents of Compositions 1 to 10 after dehydration.

[0162] Table 7 Detergent composition foam performance test

[0163] category Foam residue Example 1 -(No foam residue) Example 2 -(No foam residue) Example 3 -(No foam residue) Example 4 -(No foam residue) Example 5 -(No foam residue) Example 6 -(No foam residue) Example 7 -(No foam residue) Example 8 -(No foam residue) Example 9 -(No foam residue) Example 10 -(No foam residue)

[0164] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A detergent composition, characterized in that Calculated by weight percentage, it is made of the following components: Fatty acids 1.0%~6.0%; Anionic surfactant 15.0%~35.0%; Nonionic surfactant 8.0%~35.0%; High boiling point solvent 0.1%~6.0%; Additives 0.1%~8.0%; Soft water balance; The fatty acids are lauric acid and oleic acid; The anionic surfactant is composed of linear alkylbenzene sulfonate ethanolamine salt and ethoxylated fatty alcohol sulfate; The ethoxylated fatty alcohol sulfate has the following general formula: R1-O-EOx-SO3M; wherein R1 is a linear or branched alkyl or alkenyl group with 6 to 18 carbon atoms, EO is ethylene dioxide, x represents the average addition number, x=1 or 3, and M is an alkali metal; The ethoxylated fatty alcohol sulfate is a mixture of an ethoxylated fatty alcohol sulfate having an average addition number of 1 and an ethoxylated fatty alcohol sulfate having an average addition number of 3; The weight ratio of the ethoxylated fatty alcohol sulfate with an average addition number of 1 to the ethoxylated fatty alcohol sulfate with an average addition number of 3 is 1:1-1:5; the amount of the ethoxylated fatty alcohol sulfate is 5%-15%; The linear alkylbenzene sulfonate ethanolamine salt is used in an amount of 10%-25%; The nonionic surfactant is a fatty alcohol alkoxylate having the following general structural formula: ； Wherein, R is a linear or branched alkyl or alkenyl group with 6 to 18 carbon atoms, C2H4O is ethylene dioxide, C3H6O is propylene dioxide, C2H4O / C3H6O is randomly or block-bonded, m and n represent the average addition number, m is 0 to 10, and n is 0.5 to 10; The high boiling point solvent has a boiling point higher than 145 degrees Celsius and is selected from two of propylene glycol, 3-methoxy-3-methyl-1-butanol and dipropylene glycol methyl ether.

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