A pre-treatment detergent composition and methods of making and using the same

Abstract

The application discloses a pretreatment detergent composition and a preparation method and use method thereof, and relates to the technical field of daily chemical washing products. The pretreatment detergent composition is composed of the following raw materials in percentage by mass: 10.0-90.0% of a fatty alcohol alkoxylate, 10.0-90.0% of dimethyl decenamide; the fatty alcohol alkoxylate has the following general formula: R1-EOs / POt-H; wherein R1 is a linear or branched alkyl or alkenyl group with 6-11 carbon atoms, EO is a vinyl oxide group, PO is a propylene oxide group, EO / PO is combined in a random or block manner, s and t represent average addition numbers, s is 2-30, and t is 0.5-10. The application can remove stubborn oil stains and pen stains and has excellent environmental protection effect and safety performance by using the solvent type non-ionic surfactant dimethyl decenamide and the non-ionic surfactant fatty alcohol alkoxylate.

Description

Technical Field

[0001] This invention relates to the field of daily chemical washing products technology, and in particular to a pre-treatment detergent composition and its preparation and application methods. Background Technology

[0002] Conventional fabric detergents struggle to remove certain stubborn oily stains, such as hot pot grease and pen marks. For these stubborn stains, consumers often pre-treat with undiluted laundry detergent before hand washing. However, this method has limited effectiveness in removing stubborn oil stains, especially hot pot grease and pen marks that haven't been washed for a long time. This is because hot pot grease contains long-chain, water-insoluble solid fatty acids, which are difficult for conventional laundry detergents to remove. Dry cleaning can remove these stubborn oily stains, as it contains solvents that dissolve and soften solid fatty acids and pen marks, thus completely removing them. However, dry cleaning is rarely used in daily life, and the solvents in dry cleaning are not environmentally friendly; hands also come into contact with the solvent during cleaning, making it not a very good solution. Therefore, this invention provides a pre-treatment detergent composition, its preparation method, and its application method. By using a pre-treatment method, stubborn, old oil stains and pen marks can be completely removed without hand washing. Summary of the Invention

[0003] To overcome the above-mentioned technical defects, the present invention provides a pretreatment detergent composition and its preparation and use methods, which have excellent removal capabilities for stubborn oil stains and oily pen stains, and are safe and environmentally friendly.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] In a first aspect, a pretreatment detergent composition is provided, comprising the following raw materials in weight percentages:

[0006] Fatty alcohol alkoxylates 10.0%~90.0%, dimethyldecenoamide 10.0%~90.0%;

[0007] The fatty alcohol alkoxylates have the following general formula: R1-EOs / POt-H;

[0008] Wherein, R1 is a straight-chain or branched alkyl or alkenyl group with 6-11 carbon atoms, EO is vinyl dioxide, PO is propylene dioxide, EO / PO adopts random or block bonding, s and t represent the average addition number, s is 2~30, and t is 0.5~10.

[0009] Furthermore, the specific structural formula of the dimethyldecenamide is as follows:

[0010] .

[0011] Dimethyldecenoamide is a nonionic surfactant with solvent properties. It can dissolve stubborn oily stains and soften water-insoluble solid oil stains. Simultaneously, dimethyldecenoamide has surface activity, enabling it to emulsify and disperse stains.

[0012] Among them, fatty alcohol alkoxylates are nonionic surfactants with solvent properties. Unlike anionic surfactants, cationic surfactants, and amphoteric surfactants, fatty alcohol alkoxylates can not only emulsify and disperse oily dirt, but also dissolve certain oily stains, and have excellent removal effects on oily stains.

[0013] Furthermore, R1 is a straight-chain or branched alkyl or alkenyl group with 9-11 carbon atoms.

[0014] Furthermore, the pretreatment detergent composition comprises the following raw materials in weight percentages: fatty alcohol alkoxylate 30.0%~90.0% and dimethyldecenoamide 10.0%~70.0%.

[0015] Furthermore, the pretreatment detergent composition comprises the following raw materials in weight percentages: 50.0% to 90.0% fatty alcohol alkoxylate and 10.0% to 50.0% dimethyldecenoamide.

[0016] Furthermore, the pretreatment detergent composition comprises the following raw materials in weight percentages: 70.0%~90.0% fatty alcohol alkoxylate and 10.0%~30.0% dimethyldecenoamide.

[0017] Furthermore, the pretreatment detergent composition comprises the following raw materials in weight percentages: 90.0% fatty alcohol alkoxylate and 10.0% dimethyldecenoamide or 80.0% fatty alcohol alkoxylate and 20.0% dimethyldecenoamide.

[0018] Furthermore, the fatty alcohol alkoxylate is one of ethoxylated and propionyl heptanol, ethoxylated and propionyl hexanol, ethoxylated and propionyl hexanol, ethoxylated and propionyl hexanol, and ethoxylated and propionyl hexanol.

[0019] In a second aspect, a method for preparing the pretreated detergent composition as described in the first aspect is provided, comprising the following steps: adding dimethyldecenoamide to a fatty alcohol alkoxylate at a temperature of 25°C to 40°C according to the formulation ratio and stirring until homogeneous.

[0020] Thirdly, a method of using the pretreatment detergent composition as described in the first aspect is provided, comprising the following steps: 1) applying the pretreatment detergent composition to the soiled fabric and letting it stand for 30 to 45 minutes; 2) placing the fabric into a washing machine for washing.

[0021] Compared with the prior art, the pretreatment detergent composition provided by the present invention has the following beneficial effects:

[0022] 1) Effectively removes stubborn oil stains and pen marks;

[0023] 2) It has excellent environmental protection and safety performance, good biodegradability, and is not flammable or explosive. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a comparison image of the pre-treated detergent compositions of Example 1 and Comparative Examples 1-2 before and after the first wash in the test of their ability to remove oil stains from hot pot.

[0026] Figure 2 This is a comparison chart showing the pre-treatment detergent compositions of Example 1 and Comparative Examples 1-2 of the present invention before and after the pen stain removal ability test. Detailed Implementation

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0029] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0030] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0031] To better understand the technical content of the present invention, the technical solution of the present invention will be further introduced and explained below with reference to specific embodiments.

[0032] Pretreatment detergent composition

[0033] It is composed of the following raw materials in the following mass percentages: fatty alcohol alkoxylate 10.0%~90.0% and dimethyl decenoamide 10.0%~90.0%; wherein, both fatty alcohol alkoxylate and dimethyl decenoamide are nonionic surfactants.

[0034] The fatty alcohol alkoxylates of the present invention have the following general formula: R1-EOs / POt-H;

[0035] Wherein, R1 is a straight-chain or branched alkyl or alkenyl group with 6-11 carbon atoms, EO is vinyl dioxide, PO is propylene dioxide, EO / PO adopts random or block bonding, s and t represent the average addition number, s is 2~30, and t is 0.5~10.

[0036] Preferred examples of fatty alcohol alkoxylates described in this invention are Dow's Ecosense series, BASF's Plurafac LF series, and Lutensol XL series fatty alcohol alkoxylates.

[0037] The specific structural formula of the dimethyldecenoamide described in this invention is as follows:

[0038] .

[0039] The dimethyldecenoamide described in this invention is a nonionic surfactant with solvent properties. It can dissolve stubborn oily stains, and then the surfactant emulsifies and disperses the stains for removal, thus completely removing stubborn oily stains. Unlike conventional organic solvents such as ethanol or diethylene glycol butyl ether, dimethyldecenoamide is a nonionic surfactant, non-flammable and non-explosive, and is not managed as a hazardous material, exhibiting excellent safety and environmental benefits.

[0040] Method for preparing pre-treated detergent compositions

[0041] Dimethyldecenoamide was added to the fatty alcohol alkoxylate according to the formula ratio and stirred until homogeneous at 25°C to 40°C. The examples and comparative examples of this invention both used a preparation temperature of 25°C.

[0042] Method of using pretreatment detergent composition

[0043] 1) Apply the pretreatment detergent composition to the soiled fabric and let it stand for 30-45 minutes; 2) Place the fabric and 2 kg of accompanying fabric into the washing machine for washing. In both the embodiments and comparative examples of this invention, a 30-minute standing period is used.

[0044] Application performance testing methods

[0045] Active ingredient content test

[0046] Referring to the method for determining the total active ingredient content in the national standard GB 13174-2000, the active ingredient content was obtained by chloroform extraction, and the total active ingredient content was obtained after deducting the urea content.

[0047] Stability performance test

[0048] Refer to the test method for stability of liquid samples in standard QB / T 1224 to determine the cold resistance, heat resistance, freeze-thaw resistance, and cold and hot stability of the samples.

[0049] Room temperature stability: If the sample does not separate into layers, and there is no suspended matter or precipitation when observed at room temperature, it is considered qualified (√); otherwise, it is unqualified (×).

[0050] Cold resistance stability: After sealing the sample bottle, place it in an environment of 5±2℃ and keep it at a constant temperature for 1 month. Then take it out and restore it to room temperature of 25±5℃ for observation. If the sample does not separate into layers and there is no suspended matter or precipitation, it is judged as qualified (√). Otherwise, it is unqualified (×).

[0051] Heat resistance stability: After sealing the sample vial, place it in an environment of 45±1℃ and keep it at a constant temperature for 1 month. Then, observe it at room temperature of 25±5℃. If the sample does not separate into layers, and there is no suspended matter or precipitation, it is considered qualified (√). Otherwise, it is unqualified (×).

[0052] Freeze-thaw cycle stability: After sealing the sample vials, place them in an environment of -15 to -20℃ for 24 hours. After that, remove them and place them in an environment of room temperature (25±5)℃ for another 24 hours. This constitutes one cycle. Repeat the cycle four times. After each cycle, observe the state of the sample. If the sample does not separate into layers and there are no suspended matter or precipitates, it is considered qualified (√). Otherwise, it is unqualified (×).

[0053] Thermal cycling stability: After sealing the sample vial, place it in an environment of -15 to -20℃ for 24 hours. After that, remove it and immediately place it in an environment of 45±1℃ for 24 hours. This constitutes one cycle. Repeat the cycle four times. After each cycle, observe the sample state. If the sample does not separate into layers and there is no suspended matter or precipitation, it is considered qualified (√). Otherwise, it is unqualified (×).

[0054] 3. Test of ability to remove hot pot oil stains

[0055] Prepare a standard cotton cloth with a diameter of 6 cm. Test the blue light whiteness of the cloth before washing and record it as WR. Heat Haidilao hot pot base to 50 degrees Celsius, then use a pipette to remove the top layer of floating oil. Add 0.12g~0.15g of hot pot oil to the standard cotton cloth and let it stand for 24 hours. Test the blue light whiteness of the cloth (WR0). Use a pipette to take 2g of sample and add it to the oil-stained cloth. Let it stand for 30 minutes, then put the cloth into a drum washing machine and wash it according to the normal program. After washing, dry the cloth and test its whiteness (WR1). If there are stains remaining on the dried cloth, repeat the above process for a second wash. After washing, dry the cloth and test its whiteness (WR2). The stain removal ability of hot pot oil stains is calculated according to the following formula:

[0056] First wash: P1 = (WR1 - WR0) / (WR - WR0) × 100%

[0057] Second wash: P2 = (WR2 - WR0) / (WR - WR0) × 100%

[0058] 4. Chili oil stain removal ability test

[0059] Prepare a standard cotton cloth with a diameter of 6 cm. Test the whiteness of the cloth before washing and record it as WR. Use a pipette to take 0.12g-0.15g of Lao Gan Ma flavored chili oil and add it to the standard cotton cloth. After 24 hours, test the whiteness of the cloth (WR0). Use a pipette to take 2g of the sample and add it to the cloth with oil stains. After 30 minutes, put the cloth into a drum washing machine and wash it according to the normal program. After washing, dry the cloth and test its whiteness (WR1). If there are stains remaining on the dried cloth, repeat the above process for a second wash. After washing, dry the cloth and test its whiteness (WR2). The stain removal ability of chili oil stains is calculated using the following formula:

[0060] First wash: P1 = (WR1 - WR0) / (WR - WR0) × 100%

[0061] Second wash: P2 = (WR2 - WR0) / (WR - WR0) × 100%

[0062] 5. Stain Removal Ability Test

[0063] Draw three horizontal lines, each about 2cm long, on a standard cotton fabric using a marker or ballpoint pen. Use a pipette to take 2g of sample and add it to the fabric containing the pen stain. Let it sit for 30 minutes, then put the fabric into a front-loading washing machine and wash it according to the normal program. After washing, observe the pen stain residue on the fabric. Record it as √ if it is completely clean, and record it as × if there is pen stain residue.

[0064] In the following examples and comparative examples, the raw materials used and their active ingredient contents are as follows:

[0065] Fatty alcohol alkoxylates: Lutensol XL 80, specifically ethoxylated and propionyl 3-propylheptanol, nonionic surfactant, active ingredient content is 100%;

[0066] Fatty alcohol alkoxylates: lutensol TO 3, C13 fatty alcohol alkoxylates, nonionic surfactants, active ingredient content is 100%;

[0067] Fatty alcohol alkoxylates: lutensol AO 3, C13-C15 fatty alcohol alkoxylates, nonionic surfactants, active ingredient content is 100%;

[0068] Fatty alcohol alkoxylates: Lutensol AT 11, C16-C18 fatty alcohol alkoxylates, nonionic surfactant, active ingredient content is 100%.

[0069] Dimethyldecenoamide: STEPOSOL MET-10U, a solvent-based nonionic surfactant with an active ingredient content of approximately 100%.

[0070] Sodium dodecylbenzenesulfonate: anionic surfactant, with active ingredient content of 100%;

[0071] Sodium fatty alcohol polyoxyethylene ether sulfate: anionic surfactant, with an active ingredient content of 70%;

[0072] Cocamidopropyl betaine: an amphoteric surfactant, with an active ingredient content of 30%;

[0073] Benzalkonium chloride: a cationic surfactant, with active ingredient content of 50%;

[0074] Ethanol: Solvent, with an ethanol content of not less than 95.0% (mL / mL) and an active ingredient content of 0%.

[0075] Example

[0076] The pretreatment detergent compositions of Examples 1-5 and Comparative Examples 1-3 were prepared according to the mass percentage components in Table 1.

[0077] Table 1. Raw materials and mass percentage content of pretreatment detergent compositions in Examples 1-5 and Comparative Examples 1-3

[0078]

[0079] The pretreatment detergent compositions of Examples 1-5 and Comparative Examples 1-3 in Table 1 were tested for their ability to remove hot pot oil stains and chili oil stains. The test results are shown in Table 2.

[0080] Table 2. Detergent detergency test results of the pretreatment detergent compositions of Examples 1-5 and Comparative Examples 1-3

[0081]

[0082] Figure 1 This is a comparison image showing the pre-treatment detergent compositions of Example 1 and Comparative Examples 1-2 of the present invention before and after the first wash in a test of their ability to remove oil stains from hot pot. Figure 1 The test results in Table 2 show that the pretreatment detergent compositions of Examples 1-5, after one wash, achieved a removal rate of over 90% for hot pot oil stains and over 99% for chili oil stains. After two washes, both hot pot oil and chili oil stains were completely removed, achieving a removal rate of 100%. This is because the dimethyldecenoamide used in this invention is a solvent-based nonionic surfactant capable of dissolving and softening solid oily stains; the fatty alcohol alkoxylate has excellent emulsifying and dispersing abilities. The combination of these two components synergistically enhances the removal of oil stains.

[0083] The pretreatment detergent composition of Comparative Example 1 is a conventional fabric detergent formulation. Its removal capabilities for hot pot oil and chili oil stains are 35.2% and 43.5%, respectively. Conventional fabric detergents contain approximately 15%–20% active ingredients and a large amount of water. Since water and oily stains are incompatible, conventional detergents can only remove stains through emulsification and dispersion, and their ability to remove solid oily stains is poor. Comparative Example 1 cannot remove these stubborn oil stains, and its detergency is inferior to Examples 1–5.

[0084] The pretreatment detergent compositions of Comparative Examples 2 and 3 consisted of solvents. Test results showed that these compositions had poor removal ability for stubborn oil stains. This is because while solvents can dissolve solid oily stains, they lack the emulsifying and dispersing capabilities of surfactants. Therefore, when oily stains dissolved in solvents are placed in water, they tend to re-adhere to the fabric rather than be emulsified and dispersed in the water, resulting in poor detergency due to the solvent's limited cleaning power.

[0085] The stain removal capabilities of the pretreatment detergent compositions of Examples 1-5 and Comparative Examples 1-3 in Table 1 were tested, and the test results are shown in Table 3 below:

[0086] Table 3. Results of ink stain removal tests on the pretreatment detergent compositions of Examples 1-5 and Comparative Examples 1-3.

[0087]

[0088] Figure 2 This is a comparison graph showing the pretreatment detergent compositions of Example 1 and Comparative Examples 1-2 of the present invention before and after a pen stain removal test. Figure 2 As shown in Table 3, the pretreatment detergent compositions of Examples 1-5 of this invention, due to the combination of solvent-based nonionic surfactant dimethyldecenamide and nonionic surfactant fatty alcohol alkoxylate, can completely remove ballpoint pen and marker stains. The pretreatment detergent compositions of Comparative Examples 1-3 cannot completely remove ballpoint pen and marker stains.

[0089] The stability properties of the pretreated detergent compositions prepared according to the formulations in Examples 1-5 of Table 1 were tested, and the test results are shown in Table 4 below:

[0090] Table 4. Stability test results of the pretreated detergent compositions in Examples 1-5

[0091]

[0092] The test results in Table 4 show that the pretreated detergent compositions of Examples 1-5 of the present invention have excellent stability.

[0093] I. Influence of Pretreatment Detergent Composition Component Ratio

[0094] The pretreatment detergent compositions of Example 1 and Comparative Examples 4-9 were prepared according to the mass percentage composition in Table 5.

[0095] Table 5. Raw materials and mass percentage content of the pretreatment detergent compositions of Examples 1 and Comparative Examples 4-9

[0096]

[0097] The pretreated detergent compositions of Example 1 and Comparative Examples 4-9 were tested for their ability to remove hot pot oil and chili oil. The test results are shown in Table 6.

[0098] Table 6. Detergent detergency test results of the pretreatment detergent compositions of Examples 1 and Comparative Examples 4-9

[0099]

[0100] As shown in Table 6, the pre-treated detergent compositions of Comparative Examples 4, 8, and 9 differ from the pre-treated detergent composition of Example 1 in that the mass percentage of fatty alcohol alkoxylates is higher than the range defined in this invention, and the mass percentage of dimethyldecenoamide is lower than the range defined in this invention. The pre-treated detergent compositions prepared by Comparative Examples 4, 8, and 9 have poor effects in removing stubborn oil stains.

[0101] Compared with the pretreated detergent composition of Example 1, the pretreated detergent compositions of Comparative Examples 5, 6, and 7 differ in that the mass percentage of fatty alcohol alkoxylates is lower than the range defined in this invention, and the mass percentage of dimethyldecenoamide is higher than the range defined in this invention. The pretreated detergent compositions prepared in these examples have a poorer effect in removing stubborn oil stains.

[0102] This is because the solvent-based surfactant dimethyldecenoamide has a strong ability to dissolve oily stains, but its ability to emulsify and remove stains is poor. Therefore, in Comparative Examples 5, 6, and 7, the dimethyldecenoamide content in the pretreatment detergent compositions is too high, resulting in strong oil-dissolving ability but weak emulsifying ability, thus affecting the removal of oily stains. Similarly, in Comparative Examples 4, 8, and 9, the dimethyldecenoamide content is too low, leading to poor dissolving ability for stubborn oil stains, which also affects the removal of oily stains. Therefore, the pretreatment detergent compositions provided by this invention need to be formulated in appropriate proportions to optimize both the stain-dissolving and emulsifying abilities of the composition in order to completely remove stubborn stains.

[0103] II. The Influence of Adding Other Substances to the Pretreatment Detergent Composition

[0104] The pretreatment detergent compositions of Example 3 and Comparative Examples 10-17 were prepared according to the mass percentage composition in Table 7.

[0105] Table 7. Raw materials and mass percentage content of the pretreatment detergent compositions of Examples 3 and Comparative Examples 10-17

[0106]

[0107] The pretreatment detergent compositions of Examples 3 and Comparative Examples 10-17 were tested for their ability to remove hot pot oil stains and chili oil stains. The test results are shown in Table 8.

[0108] Table 8. Detergent detergency test results of the pretreatment detergent compositions of Examples 3 and Comparative Examples 10-17

[0109]

[0110] As shown in Table 3, the difference between Comparative Example 10 and the pretreatment detergent composition of Example 3 is that the anionic surfactant sodium fatty alcohol polyoxyethylene ether sulfate is used instead of the fatty alcohol alkoxylate in this invention; all other conditions are the same. The difference between Comparative Example 11 and the pretreatment detergent composition of Example 3 is that sodium fatty alcohol polyoxyethylene ether sulfate is used instead of some of the fatty alcohol alkoxylate in this invention; all other conditions are the same. The test results show that the pretreatment detergent compositions of Comparative Example 10 and Comparative Example 11 have poor detergency.

[0111] The difference between Comparative Example 12 and the pretreatment detergent composition of Example 3 is that the amphoteric surfactant cocamidopropyl betaine is used instead of the fatty alcohol alkoxylate in this invention; all other conditions are the same. The difference between Comparative Example 13 and the pretreatment detergent composition of Example 3 is that cocamidopropyl betaine is used instead of some of the fatty alcohol alkoxylate in this invention; all other conditions are the same. Test results show that the pretreatment detergent compositions of Comparative Example 12 and Comparative Example 13 have poor removal effects on stubborn oil stains.

[0112] The difference between Comparative Example 14 and the pretreatment detergent composition of Example 3 is that the cationic surfactant benzalkonium chloride is used instead of the fatty alcohol alkoxylate in this invention; all other conditions are the same. The difference between Comparative Example 15 and the pretreatment detergent composition of Example 3 is that benzalkonium chloride is used instead of some of the fatty alcohol alkoxylate in this invention; all other conditions are the same. Test results show that the pretreatment detergent compositions of Comparative Example 14 and Comparative Example 15 have poor removal effects on stubborn oil stains.

[0113] Compared to the pretreatment detergent compositions of Example 3, Comparative Examples 16 and 17 differed in that water was used to replace part of the dimethyldecenoamide or fatty alcohol alkoxylates. Test results showed that the pretreatment detergent compositions of Comparative Examples 16 and 17 had poor detergency against stubborn oil stains. This is mainly because water cannot dissolve oily stains and instead repels them, weakening the dissolving ability of dimethyldecenoamide for oily stains, resulting in a significant decrease in the detergency of the pretreatment detergent compositions against stubborn oil stains.

[0114] Therefore, it is evident that the anionic surfactant sodium fatty alcohol polyoxyethylene ether sulfate, the amphoteric surfactant cocamidopropyl betaine, and the cationic surfactant benzalkonium chloride all contain a certain amount of water, which weakens the ability of dimethyldecenoamide to dissolve oily stains. Furthermore, compared to the solvent-based nonionic surfactant fatty alcohol alkoxylates, these three surfactants themselves have no dissolving ability for oily stains and are poor at removing stubborn oil stains. Therefore, the addition of these three types of surfactants significantly weakens the composition's effect on removing stubborn oil stains. Thus, only a combination of the solvent-based surfactant dimethyldecenoamide and the nonionic surfactant fatty alcohol alkoxylates can effectively remove stubborn oil stains.

[0115] Influence of the type of fatty alcohol alkoxylates in the pretreatment detergent composition

[0116] The pretreatment detergent compositions of Example 1 and Comparative Examples 18-20 were prepared according to the mass percentage composition in Table 9.

[0117] Table 9. Raw materials and mass percentage content of the pretreatment detergent compositions of Examples 1 and Comparative Examples 18-20

[0118]

[0119] The pretreatment detergent compositions of Examples 1 and Comparative Examples 18-20 were tested for their ability to remove hot pot oil stains and chili oil stains. The test results are shown in Table 10.

[0120] Table 10. Detergent detergency test results of the pretreatment detergent compositions of Examples 1 and Comparative Examples 18-20

[0121]

[0122] As shown in Table 10, the difference between Comparative Examples 18-20 and the pretreatment detergent compositions of Example 1 lies in the number of carbon atoms in the hydrophobic chain of the fatty alcohol alkoxylates used. Lutensol TO has 13 carbon atoms in its 3-alkyl chain, Lutensol AO has 13-15 carbon atoms in its 3-alkyl chain, and Lutensol AT has 16-18 carbon atoms in its 11-alkyl chain. The test results indicate that Comparative Examples 18-20 have poor detergency against stubborn oil stains. This is because the higher the number of carbon atoms, the weaker the dissolving ability of the fatty alcohol alkoxylate to oil stains, resulting in poorer detergency against stubborn oil stains. Therefore, fatty alcohol alkoxylates with a low carbon number alkyl chain are preferred. When the number of carbon atoms in the alkyl chain is too low, the fatty alcohol alkoxylate will lose its surface activity; therefore, a carbon number of 6-11 is preferred.

[0123] In summary, the pretreatment detergent composition provided by the present invention has the following beneficial effects:

[0124] 1) Effectively removes stubborn oil stains and pen marks;

[0125] 2) It has excellent environmental protection and safety performance, good biodegradability, and is not flammable or explosive.

[0126] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A pretreatment detergent composition, characterized in that, It consists of the following raw materials by weight percentage: Fatty alcohol alkoxylates 70.0%~90.0%, dimethyldecenoamide 10.0%~30.0%; The fatty alcohol alkoxylates have the following general formula: R1-EOs / POt-H; Wherein, R1 is a straight-chain or branched alkyl or alkenyl group with 9-11 carbon atoms, EO is vinyl dioxide, PO is propylene dioxide, EO / PO adopts random or block bonding, s and t represent the average addition number, s is 2~30, and t is 0.5~10. The specific structural formula of the dimethyldecenoamide is as follows: 。 2. The pretreatment detergent composition according to claim 1, characterized in that, It is composed of the following raw materials in the following weight percentages: 90.0% fatty alcohol alkoxylate and 10.0% dimethyldecenoamide or 80.0% fatty alcohol alkoxylate and 20.0% dimethyldecenoamide.

3. The pretreatment detergent composition as described in claim 1, characterized in that, The fatty alcohol alkoxylated product is one of ethoxylated and propionyl heptanol, ethoxylated and propionyl heptol, and ethoxylated and propionyl nonanol.

4. The method for preparing the pretreatment detergent composition according to any one of claims 1-3, characterized in that, Includes the following steps: Add dimethyldecenoamide to the fatty alcohol alkoxylate at 25℃~40℃ according to the formula ratio and stir until homogeneous.

5. The method of using the pretreatment detergent composition according to any one of claims 1-3, characterized in that, Includes the following steps: 1) Apply the pretreatment detergent composition to the soiled fabric and let it stand for 30 to 45 minutes; 2) Put the fabric into the washing machine for washing.

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