Acidic liquid detergent composition for removing hair of pets and preparation method of acidic liquid detergent composition

Abstract

The invention relates to the field of detergents, and discloses a pet hair removal acidic liquid detergent composition and a preparation method thereof. The pet hair removal acidic liquid detergent composition is acidic and comprises 0.1-15% of an anionic surfactant, 1-15% of a nonionic surfactant, 0-10% of a zwitterionic surfactant, 0-10% of a cationic surfactant, 0-5% of a functional auxiliary agent, 0-10% of a solvent and water. Aiming at the essential reason that pet hair is difficult to wash away, fatty acid with a specific content and fatty alcohol-polyoxyethylene ether with the average repeat unit number of ethylene oxide being 15-30 are added into the faintly acid pet hair removal liquid detergent and have a synergistic effect with other surfactants, so that the washing-away rate of pet hair in fabrics is greatly improved, and the pet hair removal liquid detergent has the advantages that the pet hair removal efficiency is improved; and meanwhile, the washing time and water can be saved due to low foam and easy bleaching. In addition, the system is weakly acidic and does not cause damage to clothes.

Description

Technical Field

[0001] The invention relates to the field of detergents, in particular to an acidic liquid detergent composition for removing hair from pets and a preparation method thereof. Background Art

[0002] With the improvement of living standards and the acceleration of the pace of life, the number of pet owners in China has risen sharply in recent years. The interaction between people and pets brings about problems such as odor, urine stains, bacteria and hair. While pet owners enjoy the happiness and companionship brought by their pets, they also feel anxious about the cleanliness of the pet-raising environment. Among them, the hair problem is another major concern of pet owners after odor and bacteria.

[0003] The hair problem refers to the trouble caused to the owner's life and health by the hair dropped by cats and dogs floating in the environment or adhering to fabrics. Removing hair by washing is one of the main ways for pet owners to deal with hair adhering to fabrics. The hair of cats and dogs is divided into two layers: upper hair and bottom hair. The upper hair is longer and coarser, while the bottom hair is shorter and thinner, which is easy to generate static electricity. In addition, the fallen hair usually still has waxy sebum secreted by the pet during metabolism. The applicant found that static electricity and waxy sebum are the main reasons for the difficulty of washing hair on fabrics in addition to mechanical adhesion. Various forces make pet hair attached to fabrics particularly difficult to wash off during ordinary washing. This phenomenon is particularly prominent in families with long-haired cats.

[0004] On the other hand, the applicant also found during the research that the amount of water used in the washing process is also a key factor affecting hair removal. Due to the special structure of the drum washing machine, the amount of water used during washing is less than that of the pulsator washing machine, and the amount of water is seriously affected by the foam. The more foam, the less water intake during washing. The hair on the clothes lacks sufficient force to be washed off the clothes, resulting in extremely poor washing effect when using foam-rich detergents to wash fabrics containing pet hair in drum washing machines. In my country, almost half of the households use drum washing machines and pulsator washing machines, and the number of households using the former is on the rise.

[0005] In summary, due to the characteristics of cat and dog hair and the limitations of washing conditions, it is particularly difficult to remove hair from clothing. Detergents on the market that claim to be able to remove pet hair, such as products containing hydrogen peroxide that claim to have the effect of dissolving hair, generally have unsatisfactory actual washing effects. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a pet hair removal acidic liquid detergent composition and a preparation method thereof. The present invention aims at the fundamental reason why pet hair is difficult to wash off. By adding a specific content of fatty acid and fatty alcohol polyoxyethylene ether with an average repeating unit number of 15 to 30 ethylene oxide to a weakly acidic pet hair removal liquid detergent, and synergizing with other surfactants, the removal rate of pet hair in fabrics is greatly improved. At the same time, due to its low foaming and easy rinsing, it can save laundry time and water. In addition, the system of the present invention is weakly acidic and is applicable to a wide range of fabrics.

[0007] The specific technical scheme of the present invention is: In a first aspect, the present invention provides a pet hair removal acidic liquid detergent composition, which specifically comprises the following raw materials in percentage by mass: 0.1-15% anionic surfactant, 1-15% nonionic surfactant, 0-10% zwitterionic surfactant, 0-10% cationic surfactant, 0-5% functional additive, 0-10% solvent, and water.

[0008] The anionic surfactant comprises 0.1-3% of C10-C18 fatty acid in the total amount of the composition, and accounts for at least 3% of the total amount of the anionic surfactant. The nonionic surfactant comprises fatty alcohol polyoxyethylene ether with an average number of 15-30 ethylene oxide repeating units, and accounts for at least 5% of the total amount of the nonionic surfactant. The 1wt% aqueous solution of the pet depilatory acidic liquid detergent composition is acidic.

[0009] According to the applicant's previous research, static electricity, waxy sebum and large amount of foam are the main reasons why pet hair on fabrics is difficult to wash off. For this reason, the present invention specifically designs the above-mentioned pet hair removal acidic liquid detergent composition. The present invention can greatly improve the removal rate of fabrics containing pet hair by adding a certain amount of fatty acid and fatty alcohol polyoxyethylene ether with an average number of ethylene oxide repeating units of 15 to 30 to the pet hair removal acidic liquid detergent composition, and synergizing with other surfactants. At the same time, due to its low foam and easy bleaching, it saves laundry time and water. In addition, the combination of fatty acid and fatty alcohol polyoxyethylene ether with an average number of ethylene oxide repeating units of 15 to 30 can be used in combination with a system mainly composed of anionic surfactants, and can also be used in combination with a system mainly composed of cationic surfactants. On the basis of greatly improving the removal of hair, the needs for different laundry functions are met.

[0010] Furthermore, the present invention finds that the average number of ethylene oxide repeating units in fatty alcohol polyoxyethylene ether has a particularly important effect on the effect of removing pet hair. During the washing process, surfactants are adsorbed at the solid-liquid interface and the surface of the solution, reducing the adhesion work of dirt particles and the substrate; for fatty alcohol polyoxyethylene ether, the more average number of ethylene oxide repeating units, the greater the spatial barrier formed on the solid surface, the stronger the dispersion effect, and the better the effect of preventing dirt particles from re-depositing. Fatty alcohol polyoxyethylene ethers with a high average number of ethylene oxide repeating units have a unique structure compared to general anti-redeposition agents. The hydrophobic end can wrap waxy sebum dirt, and the hydrophilic end makes it easier to roll away hair due to its steric hindrance and excellent water solubility.

[0011] In addition, the present invention has accidentally discovered that under weakly acidic conditions, the low foaming effect brought by fatty acids and fatty alcohol polyoxyethylene ethers with a high average number of ethylene oxide repeating units have a synergistic effect, making pet hair easier to wash off. It should be emphasized that the above-mentioned synergistic effect is more significant only when the fatty alcohol polyoxyethylene ether and fatty acids are within a specific content / ratio range. For this reason, the present invention further limits the content of fatty acids and fatty alcohol polyoxyethylene ethers in the formula. When the total amount of surfactants in the system remains unchanged, when the content of fatty alcohol polyoxyethylene ethers with a high EO number is too high or too low, the hair removal rate will decrease. When the fatty acid content is too high, the system is difficult to solubilize fatty acids and is unstable. When the fatty acid content is too low, the system has abundant foam, which seriously affects the hair removal effect.

[0012] Finally, in general, cotton and wool are more likely to be attached to fabrics. They are cellulose and protein fibers, respectively, and are negatively charged in neutral or alkaline solutions. Negatively charged fabrics are not only easy to adhere to certain positively charged stains, but in some cases they will also combine with negatively charged stains, making them difficult to remove. For example, animal hair, which is negatively charged in itself, will form ion bridges with positively charged cations (such as calcium and magnesium ions) in water, and then adhere to fabric fibers during the washing process. Accordingly, the present invention designs the detergent composition to be weakly acidic, and the pH of the weakly acidic environment is close to the isoelectric point of the fabric fibers, so that the electrical charge on the fabric surface is reduced, and the probability of the fabric and pet hair being attached to the fabric due to the formation of salt bridges between the fabric and the calcium and magnesium ions is reduced, so as to prevent the pet hair from being difficult to wash off due to the action of electrostatic force.

[0013] Preferably, the pet hair removal acidic liquid detergent composition comprises the following raw materials in percentage by mass: 0.1-10% anionic surfactant, 1-10% nonionic surfactant, 0-3.5% zwitterionic surfactant, 0-7% cationic surfactant, 0-5% functional additive, 0-5% solvent, and water. Among them: The anionic surfactant contains 0.1-1.5% of C10-C18 fatty acid in the total amount of the composition, and accounts for at least 3% of the total amount of the anionic surfactant. The nonionic surfactant contains fatty alcohol polyoxyethylene ether with an average repeating number of ethylene oxide of 15-30, and accounts for at least 5% of the total amount of the nonionic surfactant.

[0014] The pH of a 1 wt % aqueous solution of the pet hair removing acidic liquid detergent composition is 4.0-6.0.

[0015] Preferably, the fatty acid is one or more of lauric acid, myristic acid, palmitic acid, and stearic acid.

[0016] Preferably, the weight ratio of the fatty acid to the fatty alcohol polyoxyethylene ether having an average repeating number of 15 to 30 ethylene oxide units is 1:1-15.

[0017] The present invention has found that the hair removal effect is better when the ratio of fatty acid to fatty alcohol polyoxyethylene ether having an average repeating unit number of 15 to 30 ethylene oxide is controlled within the above range.

[0018] Preferably, the weight ratio of the anionic surfactant to the nonionic surfactant is 1:30-2:1.

[0019] Preferably, the amphoteric surfactant is one or more of an amine oxide surfactant, a betaine surfactant, and an amino acid surfactant.

[0020] The present invention finds that when the formula system contains an amine oxide surfactant among amphoteric surfactants, since the amine oxide surfactant itself has a good foam stabilizing effect, excessive addition of the amine oxide surfactant may affect the hair removal rate to a certain extent due to its large amount of foam.

[0021] Preferably, the anionic surfactant, in addition to fatty acids, further comprises one or more of sodium fatty alcohol polyoxyethylene ether sulfate, fatty alcohol polyoxyethylene ether carboxylate, sodium alkylbenzene sulfonate and α-olefin sulfonate.

[0022] Preferably, the solvent comprises one or more of diethylene glycol hexyl ether, ethylene glycol hexyl ether, propylene glycol and glycerol.

[0023] Since the formulation system of the present invention contains fatty acids, it is not conducive to the low temperature stability of the system. The present invention finds that introducing the above solvent into the system can significantly improve the low temperature stability of the system.

[0024] Preferably, the cationic surfactant accounts for 0-30% of the total surfactant in the composition. The amphoteric surfactant accounts for 0-30% of the total surfactant in the composition.

[0025] Depending on the system, too much amphoteric surfactant or cationic surfactant will result in excessive foam, while too little will affect the softening effect.

[0026] Preferably, the fatty alcohol in the fatty alcohol polyoxyethylene ether is one or more of C10-C18 carbonyl alcohol type, Gubertin alcohol type or straight alcohol type; further, the fatty alcohol polyoxyethylene ether can be BASF's Lutensol series non-ionic surfactant, such as Lutensol TO15, Lutensol TO20, Lutensol AT25; it can be DOW's Tergitol series non-ionic surfactant, such as Tegitol 15-S-20.

[0027] Preferably, the nonionic surfactant includes, in addition to the fatty alcohol polyoxyethylene ether, one or more of fatty alcohol polyoxyethylene ethers having an average repeating unit number of ethylene oxide of 7-9, alkyl glycosides, alkylphenol polyoxyethylene ethers and fatty acid methyl ester ethoxylates.

[0028] Preferably, the functional additives include one or more of chelating agents, neutralizing agents, enzyme preparations, preservatives, inorganic salts, flavors, and pigments.

[0029] Preferably, the pet hair removal acidic liquid detergent composition comprises the following components in mass fractions: A) fatty acid surfactant 0.1-1.5%, B) nonionic surfactant 1-10%, C) 1-10% anionic surfactants other than A), D) zwitterionic surfactant 0-3.5%, E) cationic surfactant 0-7%, F) Enzyme preparation 0-1%, G) Chelating agent 0-1%, H) neutralizing agent 0.1-5%, I) Essence 0-1%, J) preservatives 0-0.2%, K) solvent 1-5%, L) Water balance.

[0030] In a second aspect, the present invention provides a method for preparing the above-mentioned pet hair removal acidic liquid detergent composition, which specifically comprises the following steps: 1) Add anionic surfactant and nonionic surfactant into water and stir evenly.

[0031] 2) Adjust the pH of the system to acidic, then add amphoteric surfactant and cationic surfactant, and stir evenly.

[0032] 3) Continue to adjust the pH of the system and stir evenly; finally, add the solvent (if any) and the functional additive (if any), stir until clear and transparent, and add water to 100% to obtain a pet hair removal acidic liquid detergent composition.

[0033] Preferably, in step 1), the stirring temperature is 45-70°C; Preferably, in step 2), the pH of the system is adjusted after the temperature is lowered to 20-30°C.

[0034] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention addresses the fundamental reason why pet hair is difficult to wash off. By adding a specific amount of fatty acid and fatty alcohol polyoxyethylene ether with an average number of ethylene oxide repeating units of 15 to 30 to a weakly acidic pet hair removal liquid detergent, the detergent synergizes with other surfactants to greatly improve the removal rate of pet hair from fabrics. At the same time, due to its low foaming and easy rinsing, it can save washing time and water.

[0035] (2) The system of the present invention is weakly acidic, which not only improves the pet hair removal rate but also does not cause damage to clothing.

[0036] (3) In order to further improve the hair removal rate, the present invention further limits the maximum content of high-foaming amphoteric surfactants represented by amine oxide surfactants in the system.

[0037] (4) Since the formulation system of the present invention contains fatty acids, it is not conducive to the low temperature stability of the system. Therefore, the present invention has found that introducing the above solvent into the system can significantly improve the low temperature stability of the system. DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with the embodiments.

[0039] Overall embodiment A pet hair-removing acidic liquid detergent composition specifically comprises the following raw materials in percentage by mass: 0.1-15% anionic surfactant, 1-15% nonionic surfactant, 0-10% zwitterionic surfactant, 0-10% cationic surfactant, 0-5% functional additive, 0-10% solvent and water.

[0040] In some preferred implementation cases, the pet hair removal acidic liquid detergent composition comprises the following raw materials in percentage by mass: 0.1-10% anionic surfactant, 1-10% nonionic surfactant, 0-3.5% zwitterionic surfactant, 0-7% cationic surfactant, 0-5% functional additive, 0-5% solvent and water.

[0041] In the above formula: the anionic surfactant contains 0.1-3% (more preferably 0.1-1.5%) of C10-C18 fatty acid in the total amount of the composition, and accounts for at least 3% of the total amount of the anionic surfactant. More preferably, the fatty acid is selected from one or more of lauric acid, myristic acid, palmitic acid, and stearic acid.

[0042] In some specific implementation cases, the nonionic surfactant comprises fatty alcohol polyoxyethylene ether having an average number of ethylene oxide repeating units of 15-30, and accounts for at least 5% of the total amount of the nonionic surfactant.

[0043] In some preferred implementation cases, the 1 wt % aqueous solution of the pet hair removal acidic liquid detergent composition is acidic, and more preferably has a pH of 4.0-6.0.

[0044] In some more preferred implementation cases, the weight ratio of the fatty acid to the fatty alcohol polyoxyethylene ether having an average number of 15-30 ethylene oxide repeating units is 1:1-15.

[0045] In some specific implementation cases, the weight ratio of the anionic surfactant to the nonionic surfactant is 1:30-2:1.

[0046] In some specific implementation cases, the amphoteric surfactant includes one or more of an amine oxide surfactant, a betaine surfactant, and an amino acid surfactant.

[0047] In some specific implementation cases, the anionic surfactant, in addition to fatty acids, further comprises one or more of fatty alcohol polyoxyethylene ether sodium sulfate, fatty alcohol polyoxyethylene ether carboxylates, sodium alkylbenzene sulfonate and α-olefin sulfonate.

[0048] In some specific implementation cases, the cationic surfactant accounts for 0-30 wt % of the total amount of surfactants in the composition.

[0049] In some specific implementation cases, the amphoteric surfactant accounts for 0-20 wt % of the total amount of surfactants in the composition.

[0050] In some specific implementation cases, the solvent includes one or more of diethylene glycol hexyl ether, ethylene glycol hexyl ether, propylene glycol and glycerol.

[0051] In some specific implementation cases, the fatty alcohol in the fatty alcohol polyoxyethylene ether is one or more of C10-C18 carbonyl alcohol type, Gubertin alcohol type or straight alcohol type; in some more preferred implementation cases, the fatty alcohol polyoxyethylene ether can be BASF's Lutensol series of non-ionic surfactants, such as Lutensol TO15, Lutensol TO20, Lutensol AT25; it can be DOW's Tergitol series of non-ionic surfactants, such as Tegitol 15-S-20.

[0052] In some specific implementation cases, the nonionic surfactant, in addition to fatty alcohol polyoxyethylene ether, also includes one or more of fatty alcohol polyoxyethylene ether with an average repeating unit number of ethylene oxide of 7-9, alkyl glycosides, alkylphenol polyoxyethylene ethers and fatty acid methyl ester ethoxylates.

[0053] In some specific implementation cases, the functional additives include one or more of chelating agents, neutralizing agents, enzyme preparations, preservatives, inorganic salts, flavors and pigments.

[0054] In some more preferred implementation cases, the pet hair removal acidic liquid detergent composition comprises the following components in mass fractions: A) fatty acid surfactant 0.1-1.5%, B) nonionic surfactant 1-10%, C) 1-10% anionic surfactants other than A), D) zwitterionic surfactant 0-3.5%, E) cationic surfactant 0-7%, F) Enzyme preparation 0-1%, G) Chelating agent 0-1%, H) neutralizing agent 0.1-5%, I) Essence 0-1%, J) Preservatives 0-0.2% K) Solvent 1-5% L) Water balance.

[0055] A method for preparing the above-mentioned pet hair removal acidic liquid detergent composition specifically comprises the following steps: 1) Add anionic surfactant and nonionic surfactant into water and stir evenly.

[0056] In some specific implementation cases, in step 1), the stirring temperature is 45-70°C.

[0057] 2) Adjust the pH of the system to acidic, then add amphoteric surfactant (if any) and cationic surfactant (if any), and stir evenly.

[0058] In some specific implementation cases, in step 2), the pH of the system is adjusted to acidic after cooling to 20-30°C.

[0059] 3) Continue to adjust the pH of the system and stir evenly; finally, add the solvent (if any) and the functional additive (if any), stir until clear and transparent, and add water to 100% to obtain a pet hair removal acidic liquid detergent composition.

[0060] Specific Examples and Comparative Examples The pet hair removal liquid detergent compositions in the following examples and comparative examples are obtained by referring to the following preparation method, which specifically comprises the following steps: 1) Weigh 60 wt% of deionized water, add anionic surfactant and nonionic surfactant into the deionized water, and stir evenly at 65°C; 2) After cooling to 25°C, adjust the pH to acidic with citric acid, then add amphoteric surfactant (if any) and cationic surfactant (if any), and stir evenly; 3) If the pH of the 1%wt solution is lower than 4.0 or higher than 6.0, adjust the pH to within the range of 4.0-6.0 with monoethanolamine or citric acid and stir evenly; finally, add the solvent (if any) and the functional additive (if any), stir until clear and transparent, and add water to 100% to obtain a pet hair removal liquid detergent composition.

[0061] Unless otherwise specified, the raw materials or reagents used in the following examples are common commercially available products.

[0062] The trade names or abbreviations of some components used in the embodiments and comparative examples are as follows: Lutensol TO 15: Fatty alcohol polyoxyethylene ether, the fatty alcohol is C13 carbonyl alcohol, and the average degree of ethoxylation is 15.

[0063] Lutensol TO 20: Fatty alcohol polyoxyethylene ether, the fatty alcohol is C13 carbonyl alcohol, and the average degree of ethoxylation is 20.

[0064] Lutensol AT 25: Fatty alcohol polyoxyethylene ether, the fatty alcohol is C16C18 fatty alcohol, and the average degree of ethoxylation is 25.

[0065] LutensolXL90: Fatty alcohol polyoxyethylene ether, the fatty alcohol is C10 Gubert alcohol, and the average degree of ethoxylation is 9.

[0066] Rewosoft LD: cationic surfactant, imidazoline type quaternary ammonium salt.

[0067] <Stability Test> The evaluation method of the high and low temperature stability of the detergent composition is as follows: take an appropriate amount of the composition prepared in the application example and put it into a 50 ml transparent PET bottle, put the sample into a -5°C low-temperature freezer for storage, take it out after 24 hours, observe the appearance of the sample and record it.

[0068] <Hair removal rate test method> Weigh 0.1g of the inner cat hair of the screened ragdoll cat, evenly spread it on a pre-treated 25cm*30cm navy blue pure cotton cloth, press it flat and put it into the washing machine, put in 1kg of washing cloth at the same time, and then add 30g of liquid detergent. Set the washing machine (Siemens drum washing machine WM10N0R80W) mode to "Cold mixed wash" (45min) and start washing; after washing, take out the cloth and hang it to dry, use a hair scraper to scrape off the remaining hair on the cloth and weigh it, record it as m. When the hair removal rate is less than 75%, it is considered that the hair removal effect of the formula is average or poor.

[0069] Hair removal rate / % = (0.1-m / 0.1)*100% (I) The formulas of the pet hair removal liquid detergent compositions of Example 1 and Comparative Examples 1-4 are shown in the following table: Table 1 Components Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Fatty alcohol polyoxyethylene ether (9EO) 4.0 4.0 4.0 4.0 4.0 Alkyl glycoside 2.0 2.0 2.0 2.0 2.0 Fatty alcohol polyoxyethylene ether sodium sulfate 4.0 4.0 4.0 4.0 4.0 Sodium linear alkylbenzene sulfonate 2.5 5.0 / 4.5 3.0 Cocamidopropylamine oxide / / 2.5 / / Cocamidopropyl Betaine / / 2.5 / / Lutensol TO 20 2.0 / / / 2.0 Palmitic acid 0.5 / / 0.5 / Monoethanolamine Moderate Moderate Moderate Moderate Moderate Citric acid monohydrate 1.0 1.0 1.0 1.0 1.0 Tetrasodium Glutamate Diacetate 0.2 0.2 0.2 0.2 0.2 Casson 0.1 0.1 0.1 0.1 0.1 Deionized water margin margin margin margin margin 1% aqueous solution pH 4.8 4.8 4.8 4.8 4.8 Hair removal rate / % 85.2 55.1 68.5 69.9 53.8 According to the formulas of Example 1, Comparative Example 1 and Comparative Example 2 and the results of the hair removal rate, it can be seen that in Example 1, the compound combination of Lutensol TO 20 with a high number of ethylene oxide repeating units and fatty acid (myristic acid) can greatly improve the hair removal rate. When there is only fatty acid (Comparative Example 3) or only Lutensol TO 20 (Comparative Example 4) in the formula, the hair removal effect is not as good as that of Example 1 when used in combination; because only Lutensol TO 20 is contained, the foam in the washing process of the system is further increased, which limits the role of Lutensol TO 20, resulting in the hair removal rate of Comparative Example 4 being not as good as that of Comparative Example 2. The above results show that the combination of Lutensol TO 20 and myristic acid has a significant synergistic effect on the hair removal effect in this system, and is significantly better than the detergents on the market that claim to have hair removal effects (the hair removal rate of hair removal detergents on the market is about 70%).

[0070] (II) The formulas of the pet hair removal liquid detergent compositions of Examples 1-4 and Comparative Example 5 are shown in the following table: Table 2 From the data comparison of Examples 1-4, it can be seen that the compound combination of Lutensol TO 20 and myristic acid (fatty acid) can play a role in the formulation system with anionic surfactants (Example 1), containing a large amount of cationic surfactants (Example 2) and containing amphoteric surfactants (Examples 3 and 4), respectively, and thus can meet the development requirements of different formulations. However, in Examples 2-4, since the amine oxide type surfactant itself has a good foam stabilizing effect, when the amount of amine oxide type surfactant added is too high, it is easy to affect the hair removal rate due to excessive foam, so it is necessary to limit its maximum content in the system.

[0071] In addition, when the components of the detergent composition remain unchanged and the pH of the system is adjusted to alkaline (pH=9.1), the hair removal rate of the system is greatly reduced (Comparative Example 5).

[0072] (III) The formula of the pet hair removal liquid detergent composition of Example 1, Examples 5-6 and Comparative Examples 3-4 and Comparative Example 6 is shown in the following table: Table 3 According to the comparison of Example 1, Comparative Example 4 and Comparative Example 6, it can be found that when the detergent composition does not contain fatty acid (myristic acid) (Comparative Example 4) or the fatty acid content is too low (Comparative Example 6), the foam cannot be suppressed and cannot play a synergistic role with Lutensol TO 20, resulting in a significant decrease in the hair removal rate. By comparing the data of Example 1, Examples 7-8 and Comparative Example 3, it can be seen that the effect of the addition amount of Lutensol TO 20 (Examples 5 and 6) on the hair removal rate is not as great as that of fatty acids, but its absence (Comparative Example 3) will also significantly affect the hair removal effect.

[0073] (IV) The formulas of the pet hair removal liquid detergent compositions of Example 1, Examples 7-8 and Comparative Example 7 are shown in the following table: Table 4 Components Example 1 Example 7 Example 8 Comparative Example 7 Fatty alcohol polyoxyethylene ether (9EO) 4.0 4.0 4.0 4.0 Alkyl glycoside 2.0 2.0 2.0 2.0 Fatty alcohol polyoxyethylene ether sodium sulfate 4.0 4.0 4.0 4.0 Sodium linear alkylbenzene sulfonate 2.5 2.5 2.5 2.5 Lutensol XL90 / / / 2.0 Lutensol TO 15 2.0 / / / Lutensol TO 20 / 2.0 / / Lutensol AT25 / / 2.0 / Palmitic acid 0.5 0.5 0.5 0.5 Monoethanolamine Moderate Moderate Moderate Moderate Citric acid monohydrate 1.0 1.0 1.0 1.0 Tetrasodium Glutamate Diacetate 0.2 0.2 0.2 0.2 Casson 0.1 0.1 0.1 0.1 Deionized water margin margin margin margin 1% aqueous solution pH 4.8 4.8 4.8 4.8 Hair removal rate / % 85.2 82.5 86.1 68.7 Lutensol XL90 in Comparative Example 10 is an isomeric fatty alcohol polyoxyethylene ether having an average repeating unit number of ethylene oxide of 9. According to the data of Example 1, Example 7, Example 8 and Comparative Example 7 in Table 4, it can be found that only when the average repeating unit number of ethylene oxide is above 15 (Examples 1, 7 and 8), it can have a good synergistic effect on the hair removal effect after compounding with fatty acids.

[0074] (V) The formulas of the pet hair removal liquid detergent compositions of Examples 9-11 and Comparative Examples 8-9 are shown in the following table: Table 5 According to the hair removal rate results of Example 1, Example 9 and Example 10, myristic acid, palmitic acid and stearic acid can all play a synergistic role with fatty alcohol polyoxyethylene ether with high EO number. From Example 9 and Comparative Example 8, Example 11 and Comparative Example 9, it can be seen that the composition can work together only when the ratio of anionic and nonionic surfactants, and the ratio of fatty acids and fatty alcohol polyoxyethylene ether with high EO number are within the required range.

[0075] (VI) The formulas of the pet hair removal liquid detergent compositions of Example 1, Examples 12-13 and Comparative Examples 10-12 are shown in the following table: Table 6 Note: “x” indicates turbidity; “√” indicates clearness.

[0076] According to the data in Table 6, Example 1, which has excellent hair removal effect, has poor stability under low temperature conditions. After introducing different solvents based on the formula of Example 1 (specifically, Example 12 introduces ethylene glycol hexyl ether, Example 13 introduces diethylene glycol hexyl ether, Comparative Example 10 introduces diethylene glycol butyl ether, Comparative Example 11 introduces butanediol, and Comparative Example 12 introduces isopropanol), it is found that only ethylene glycol hexyl ether (Example 12) and diethylene glycol hexyl ether (Example 13) can significantly improve the low temperature stability of the system when added in a relatively low amount, while diethylene glycol butyl ether (Comparative Example 10), butanediol (Comparative Example 11) and isopropanol (Comparative Example 12) do not have similar effects.

[0077] In summary, the pet hair removal acidic liquid detergent composition of the present invention has the following characteristics: (1) The present invention is based on the previous research findings that static electricity, waxy sebum, and large amounts of foam are the main reasons why pet hair on fabrics is difficult to wash off, and the formula of the acidic liquid detergent composition for pet hair removal is designed in a targeted manner. The present invention adds a specific amount of fatty acid and fatty alcohol polyoxyethylene ether with an average number of ethylene oxide repeating units of 15 to 30 to the pet hair removal acidic liquid detergent composition. Under weakly acidic conditions, the low foaming effect brought by the fatty acid and the fatty alcohol polyoxyethylene ether with a high average number of ethylene oxide repeating units have a synergistic effect, making it easier to wash off pet hair; and on this basis, after being combined with other surfactants, the washing rate of fabrics containing pet hair can be further improved. At the same time, due to its low foam and easy rinsing, it saves washing time and water. In addition, the combination of fatty acid and fatty alcohol polyoxyethylene ether with an average number of ethylene oxide repeating units of 15 to 30 can be used in combination with a system mainly composed of anionic surfactants, and can also be used in combination with a system mainly composed of cationic surfactants. On the basis of greatly improving the hair removal, the needs for different laundry functions are met.

[0078] (2) To address the problem that cotton and wool in natural fiber fabrics are easily negatively charged in neutral or alkaline solutions and are easily combined with negatively charged stains such as hair through calcium and magnesium ions in water. The present invention designs the pet hair removal acidic liquid detergent composition to be weakly acidic. In a weakly acidic environment, the surface charge is reduced, which prevents the pet hair from being difficult to remove due to the combination of weak electrostatic forces.

[0079] (3) The pet depilatory acidic liquid detergent composition of the present invention further limits the maximum content of the amine oxide type surfactant in the system, which can avoid the problem of increased foam volume due to excessive addition of the amine oxide type surfactant, thereby affecting the depilatory rate.

[0080] (4) To address the problem of poor low-temperature stability of the system due to the introduction of fatty acids, the pet hair removal acidic liquid detergent composition of the present invention preferably further contains a specific solvent, which can significantly improve the low-temperature stability of the system.

[0081] The raw materials and equipment used in the present invention, unless otherwise specified, are all commonly used raw materials and equipment in the art; the methods used in the present invention, unless otherwise specified, are all conventional methods in the art.

[0082] 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 pet depilatory acidic liquid detergent composition, Features The following raw materials are included in the following mass percentages: 0.1-15% anionic surfactant, 1-15% nonionic surfactant, 0-10% zwitterionic surfactant, 0-10% cationic surfactant, 0-5% functional additives, 0-10% solvent, water; in: The anionic surfactant comprises 0.1-3% of C10-C18 fatty acid in the total amount of the composition, and accounts for at least 3% of the total amount of the anionic surfactant; The nonionic surfactant comprises fatty alcohol polyoxyethylene ether having an average number of ethylene oxide repeating units of 15-30, and accounts for at least 5% of the total amount of the nonionic surfactant; A 1 wt % aqueous solution of the pet hair removal acidic liquid detergent composition is acidic.

2. The pet depilatory acidic liquid detergent composition according to claim 1, Features The following raw materials are included in the following mass percentages: 0.1-10% anionic surfactant, 1-10% nonionic surfactant, 0-3.5% zwitterionic surfactant, 0-7% cationic surfactant, 0-5% functional additives, 0-5% solvent, water; in: The anionic surfactant comprises 0.1-1.5% of C10-C18 fatty acid in the total amount of the composition, and accounts for at least 3% of the total amount of the anionic surfactant; The nonionic surfactant comprises fatty alcohol polyoxyethylene ether having an average number of ethylene oxide repeating units of 15-30, and accounts for at least 5% of the total amount of the nonionic surfactant; The pH of a 1 wt % aqueous solution of the pet hair removal acidic liquid detergent composition is 4.0-6.

0.

3. The pet depilatory acidic liquid detergent composition according to claim 1 or 2, Features: The weight ratio of the fatty acid to the fatty alcohol polyoxyethylene ether having an average repeating unit number of 15-30 ethylene oxide is 1:1-15.

4. The pet depilatory acidic liquid detergent composition according to claim 1 or 2, Features: The weight ratio of the anionic surfactant to the nonionic surfactant is 1:30-2:

1.

5. The pet depilatory acidic liquid detergent composition according to claim 1 or 2, Features: The amphoteric surfactant is selected from one or more of an amine oxide surfactant, a betaine surfactant, and an amino acid surfactant.

6. The pet depilatory acidic liquid detergent composition according to claim 1 or 2, Features: The anionic surfactant contains, in addition to fatty acids, one or more of fatty alcohol polyoxyethylene ether sodium sulfate, fatty alcohol polyoxyethylene ether carboxylate, sodium alkylbenzene sulfonate and α-olefin sulfonate.

7. The pet depilatory acidic liquid detergent composition according to claim 1 or 2, Features: The cationic surfactant accounts for 0-30% of the total amount of surfactants in the composition; and / or The amphoteric surfactant accounts for 0-30% of the total amount of surfactants in the composition.

8. The pet depilatory acidic liquid detergent composition according to claim 1 or 2, Features: The solvent includes one or more of diethylene glycol hexyl ether, ethylene glycol hexyl ether, propylene glycol and glycerol.

9. The pet depilatory acidic liquid detergent composition according to claim 1 or 2, Features: The fatty alcohol in the fatty alcohol polyoxyethylene ether is one or more of C10-C18 carbonyl alcohol type, Gubert alcohol type or straight alcohol type; and / or The nonionic surfactant includes, in addition to fatty alcohol polyoxyethylene ether, one or more of fatty alcohol polyoxyethylene ether with an average repeating unit number of ethylene oxide of 7-9, alkyl glycoside, alkylphenol polyoxyethylene ether and fatty acid methyl ester ethoxylate.

10. A method for preparing the pet hair removal acidic liquid detergent composition according to any one of claims 1 to 9, Features The following steps are involved: 1) Add anionic surfactant and nonionic surfactant into water and stir evenly; 2) Adjust the pH of the system to acidic, then add amphoteric surfactant and cationic surfactant, and stir evenly; 3) Continue to adjust the pH of the system and stir evenly; finally, add the solvent and functional additive, stir until clear and transparent, and add water to 100% to obtain a pet hair removal acidic liquid detergent composition.

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