Solid detergent composition and preparation method thereof

Abstract

The invention relates to the field of daily chemicals, and discloses a solid detergent composition and a preparation method thereof. The solid detergent composition comprises the following components in percentage by weight: 5-20% of a structurable component, 15-60% of a polyether nonionic surfactant, 0.1-20% of an organic alcohol ether solvent, 0-10% of other auxiliaries and water. The specific high-content polyether nonionic surfactant is used for dispersing and emulsifying structurable components such as hydrogenated castor oil or polyamide wax, and the prepared solid detergent under specific process conditions has higher paste hardness at room temperature, is similar to that of common washing soap, and also has washability similar to that of a washing soap product. Moreover, the solid detergent composition disclosed by the invention has excellent dirt-removing power and hard water resistance, and has better color protection performance on fabrics.

Description

Technical Field

[0001] The invention relates to the field of daily chemicals, and in particular to a solid detergent composition and a preparation method thereof. Background Art

[0002] Laundry soap is the most common solid detergent product at present. It is still widely used by Chinese consumers because of its low price, easy availability and good washing effect. The main ingredient of traditional laundry soap products is soap, which refers to sodium fatty acid, accounting for about 50-80% of the product. The structural characteristics of sodium fatty acid also lead to many defects in laundry soap products. For example, daily water is hard water, and sodium fatty acid easily combines with calcium and magnesium ions in hard water to form soap scum, which not only loses its surface activity and loses some washing performance, but also easily adsorbs on washing items or clothes, causing the clothes to turn yellow and harden, and lose their original color. Although in the existing technology, laundry soap products are all formulated with a certain amount of calcium soap dispersant to optimize the product's hard water resistance, their hard water resistance and color protection performance are still not very satisfactory compared to liquid cleaning products.

[0003] Compared with sodium fatty acid, nonionic surfactant has better detergency and stronger hard water resistance. Therefore, adding nonionic surfactant to laundry soap can improve the hard water resistance and color protection performance of laundry soap. Unfortunately, if the addition amount of conventional nonionic surfactant is too much, the hardness of laundry soap will decrease, which will not only increase the difficulty of the production process of laundry soap, but also affect its use effect. Therefore, it is currently impossible to prepare new solid detergents with pure nonionic surfactants (i.e., without sodium fatty acid), but only partially replace sodium fatty acid in the formula.

[0004] Hydrogenated castor oil (HCO) and polyamide wax are common rheology modifiers in the current industrial field and are often used in the preparation of various rheology modifiers or suspension structurants. The basic process principle is to activate the above-mentioned structurable components under certain conditions and disperse them in the system, and promote them to form structurants under certain process conditions. From a molecular mechanism point of view, it mainly utilizes the hydroxyl groups in the molecules of the structurable components themselves, and through the hydrogen bonding between the molecules, a three-dimensional network structure is formed.

[0005] Since most of the existing structural agent products are used as a new raw material in other water / solvents to modify the system externally, in order to make it easier to use, the existing structural agents tend to be optimized in the direction of "good fluidity" and "soft paste". There are many documents that have disclosed and studied this direction, but there is no relevant document that discloses the technical means of making the castor oil or polyamide wax structural agent hard. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a solid detergent composition and a preparation method thereof. The present invention disperses and emulsifies hydrogenated castor oil or polyamide wax and other structurable components with a specific high content of polyether nonionic surfactant. The solid detergent prepared under specific process conditions has a high paste hardness at room temperature, which is similar to that of ordinary laundry soap, and also has a wash resistance close to that of laundry soap products. In addition, the solid detergent composition of the present invention has excellent detergency and hard water resistance, and better color protection performance for fabrics.

[0007] The specific technical scheme of the present invention is: In a first aspect, the present invention provides a solid detergent composition, comprising the following raw materials in mass percentage: 5-20% of a structurable component, 15-60% of a polyether nonionic surfactant, 0.1-20% of an organic alcohol ether solvent, 0-10% of other additives, and water. The structurable component is a rheology modifier that can be dispersed in an aqueous solution and form a spatial network structure and has thixotropic properties.

[0008] As described in the background technology section of this application, nonionic surfactants have better detergency and hard water resistance than sodium fatty acids, but the introduction of conventional nonionic surfactants will lead to a decrease in the hardness of laundry soap, which will not only increase the difficulty of the production process of laundry soap, but also affect its use effect. Therefore, it is currently impossible to prepare solid detergents with pure nonionic surfactants (referring to those without sodium fatty acids).

[0009] In order to prepare solid detergents with pure non-ionic surfactants, the present invention has found through research that by dispersing and emulsifying structurable ingredients such as hydrogenated castor oil or polyamide wax with a specific high content of polyether non-ionic surfactants, the solid detergent prepared under specific process conditions has a high paste hardness at room temperature, which is similar to that of ordinary laundry soap, and also has wash resistance similar to that of laundry soap products.

[0010] The possible principle of the present invention is as follows: the specific polyether nonionic surfactant itself is a milky white ointment solid at room temperature or low temperature, but when enough structurable components are further introduced into the nonionic system to form a structurant, the spatial three-dimensional network structure formed by the structurable components greatly improves the rigidity and hardness of the nonionic surfactant raw material itself, thereby making it possible to prepare a new solid laundry product with nonionic surfactant alone. At the same time, since the solid detergent of the present invention is prepared from an oil-in-water emulsion, the outer continuous phase of the original emulsion during the preparation process is water, so the final solid detergent has a certain water solubility or water dispersibility. Considering that there is a higher content of nonionic surfactant in the formula, and the nonionic surfactant itself has better detergency and hard water resistance than sodium fatty acid, the solid detergent product also has better detergency and hard water resistance, the washing effect will not be weakened under hard water conditions, and the residue on the fabric is relatively less, and the color care performance of the fabric is relatively better.

[0011] Further, based on the above principle, if you want to further improve the hardness of the product, you can improve the content of structured components or polyether nonionic surfactant content by improving. But considering that the polyether nonionic surfactant of higher concentration is soluble in water and easily produces gel phenomenon, it is also necessary to introduce an appropriate amount of organic alcohol ether solvent (organic alcohol ether solvent can play a solubility-promoting effect, improve solubility) in the system. In addition, if the content of structured components is too high, the hardness of the final product will also be too high, thus being difficult to scrub in use, affecting user experience and cleaning effect. Therefore, the content of components such as structured components, polyether nonionic surfactant and organic alcohol ether solvent in the formula of the present invention needs to be strictly controlled within a limited range.

[0012] Preferably, the solid detergent composition comprises the following raw materials in percentage by mass: 8-15% of structurable components, 25-50% of polyether nonionic surfactants, 0.1-20% of organic alcohol ether solvents, 0-10% of other additives, and water.

[0013] The present invention finds that under the above preferred formulation, the resulting solid detergent has a better overall effect.

[0014] Preferably, the structurable component includes but is not limited to one or more of hydrogenated castor oil and polyamide wax, wherein hydrogenated castor oil is prepared by hydrogenating castor oil to convert double bonds, and polyamide wax is prepared by polymerization and dehydration of organic acid and organic amine substances.

[0015] Further preferably, the castor oil comprises hydroxyl groups, C 10 To C 22 The glycerol ester of the alkyl or alkenyl part is specifically selected from trihydroxystearin, dihydroxystearin and mixtures thereof.

[0016] More preferably, the melting point of the polyamide wax is 110-130°C.

[0017] The present invention has found through experiments that if the melting point of the polyamide wax is too high, the hardness of the final product will be too hard and it is not suitable for actual hand washing applications. Therefore, it is preferred that the melting point of the polyamide wax is within the above range.

[0018] Preferably, the polyether nonionic surfactant is a linear or branched fatty alcohol alkoxylate with a carbon chain of C8 to C22, including but not limited to nonionic surfactants formed by ethoxylation or propoxylation or ethoxylation / propoxylation copolymerization, preferably a nonionic surfactant that is solid at low temperature or room temperature, with a melting point of >20°C.

[0019] The present invention compared the effects of different types of polyether nonionic surfactants in the experiment, and surprisingly found that the hardness of the solid detergent prepared by using polyether nonionic surfactants with a small number of ethylene oxide additions (such as AEO-3 and AEO-6) is not as good as that of polyether nonionic surfactants with a large number of ethylene oxide additions such as AEO-9, while the use of higher carbon chains such as C16 / C18 alcohol polyether surfactants (EP2325) has similar performance to AEO-9. It is speculated that this may be because the raw materials such as AEO-3 and AEO-6 have lower freezing points and are thus low-viscosity liquids at room temperature, while AEO-9 and EP2325 are solid at room temperature or low temperatures. It is speculated that polyether nonionic surfactants that are close to solid at room temperature are more suitable as emulsifiers for structured components. Therefore, nonionic surfactants that are solid at low temperatures or room temperature are preferred, and preferably have a melting point of >20°C.

[0020] Preferably, the organic alcohol ether solvent includes, but is not limited to, one or more of propylene glycol, glycerol, sorbitol, mannitol, polyethylene glycol, butyl ether, ethylene glycol dimethyl ether, ethylene glycol butyl ether, propylene glycol methyl ether and 3-methoxy-3-methyl-1-butanol.

[0021] Preferably, the other auxiliary agents include one or more of enzyme preparations, colorants, colorants, anti-redeposition agents, whitening agents, preservatives, fragrances and color stabilizers.

[0022] In a second aspect, the present invention provides a method for preparing the above-mentioned solid detergent composition, which specifically comprises the following steps: 1) mixing most of the polyether nonionic surfactant, water, and part or all of the organic alcohol ether solvent to form a surfactant solution of a certain concentration, heating, and keeping warm.

[0023] 2) mixing the structurable component with the remaining polyether nonionic surfactant and the remaining organic alcohol ether solvent (if any), heating them to melt and dissolve them, and slowly adding the melted product to the solution obtained in step 1) under homogenizing conditions to fully emulsify them to form an O / W emulsion.

[0024] 3) Cool down under homogenization conditions, add other optional additives, and make up the water.

[0025] 4) The emulsion obtained in step 3) is transferred to a specific mold, cooled, and demoulded to obtain a solid detergent composition.

[0026] The present invention first forms an emulsion with a polyether type nonionic surfactant emulsified with a higher concentration of structured components, and the emulsion is demulsified to form a structure through cooling, thereby introducing a "skeleton" structure in the polyether type nonionic surfactant solution system, and then forming a solid detergent with a certain hardness. In the actual operation process, due to the limited solubility of the polyether type nonionic surfactant in water, it is easy to gel, so the present invention also needs to introduce a small amount of alcohol ether cosolvent to dissolve and break gel. In addition, due to the part of the structured components, the fusing point of polyamide wax is usually higher than the fusing point of water, which is unfavorable for production operation, thereby available part of the polyether type nonionic surfactant and organic alcohol ether solvent cosolvent, activation structured components, reduce the fusing point of the system, thereby can be added to the water phase system.

[0027] Preferably, in step 1), the mass concentration of the polyether nonionic surfactant in the solution is 20-60%.

[0028] The present invention finds that if the concentration of the polyether nonionic surfactant is too low during emulsification, the hardness of the formed solid composition is relatively low and may not be as good as soap; since the solubility of the polyether nonionic surfactant itself is limited, the concentration of the emulsifier cannot be higher. At the same time, a higher concentration of the polyether nonionic surfactant is prone to form a gel with water, which is not conducive to practical operation.

[0029] Preferably, in step 1), the pH of the solution is adjusted to 6-9 before heating.

[0030] Preferably, in step 1), the temperature after heating is 70-95°C.

[0031] The melting point of the structured material in the present invention is relatively high. Although the polyether nonionic surfactant and some organic alcohol ether solvents reduce the melting point to a certain extent, in order to ensure that they can be fully emulsified and dispersed in the system after addition, the temperature in step 1 still needs to be maintained in a relatively high range, preferably 70 to 95°C.

[0032] Preferably, in step 2), the particle size of the emulsion droplets in the O / W emulsion needs to be roughly uniform, within the range of 10 to 100 μm, preferably within the range of 10 to 50 μm.

[0033] Preferably, in step 3), the cooling rate is 0.5-2.0°C / min, and the temperature after cooling is 50-80°C.

[0034] Too fast a cooling rate can easily lead to too fast precipitation and crystallization of HCO, while too slow a cooling rate can affect the actual production efficiency. At the same time, the approximate temperature for forming a structure of HCO emulsified with polyether nonionic emulsifier is in the range of 50-80°C. After the structure is formed, the consistency and hardness of the paste increase.

[0035] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention uses a specific high content of polyether nonionic surfactant to disperse and emulsify hydrogenated castor oil or polyamide wax and other structurable ingredients. The solid detergent prepared under specific process conditions has a high paste hardness at room temperature, which is similar to that of ordinary laundry soap, and also has a wash resistance similar to that of laundry soap products.

[0036] (2) The solid detergent composition of the present invention has excellent detergency and hard water resistance. The washing effect is not weakened under hard water conditions, and the residue on the fabric is relatively less, and the color protection performance of the fabric is better. DETAILED DESCRIPTION

[0037] The present invention is further described in the following examples, but the protection scope of the present invention is not limited thereto.

[0038] The professional terms and technical means used in the present invention have the same meanings as those generally understood by those skilled in the art. Unless otherwise specified, the various reagents, raw materials, equipment, etc. in the present invention are commonly used reagents, raw materials, equipment understood by those skilled in the art and are all commercially available.

[0039] Overall embodiment In a first aspect, the present invention provides a solid detergent composition, comprising the following raw materials in mass percentage: 5-20% of a structurable component, 15-60% of a polyether nonionic surfactant, 0.1-20% of an organic alcohol ether solvent, 0-10% of other additives, and water. The structurable component is a rheology modifier that can be dispersed in an aqueous solution and form a spatial network structure and has thixotropic properties.

[0040] In some preferred implementation cases, the solid detergent composition comprises the following raw materials in percentage by mass: 8-15% structurable component, 25-50% polyether nonionic surfactant, 0.1-20% organic alcohol ether solvent, 0-10% other additives, and water.

[0041] In some preferred implementation cases, the structurable component includes but is not limited to one or more of hydrogenated castor oil and polyamide wax. Among them, hydrogenated castor oil is prepared by hydrogenating castor oil to convert double bonds; polyamide wax is prepared by polymerization and dehydration of organic acid and organic amine substances.

[0042] In some more preferred embodiments, the castor oil comprises hydroxyl groups, C 10 To C 22 The glycerides of the alkyl or alkenyl part specifically include trihydroxystearin, dihydroxystearin and mixtures thereof. The melting point of the polyamide wax is 110-130°C.

[0043] In some preferred implementation cases, the polyether nonionic surfactant is a linear or branched fatty alcohol alkoxylate with a carbon chain of C8 to C22, including but not limited to nonionic surfactants formed by ethoxylation or propoxylation or ethoxylation / propoxylation copolymerization, preferably a nonionic surfactant that is solid at low temperature or room temperature, with a melting point > 20°C.

[0044] In some preferred implementation cases, the organic alcohol ether solvent includes but is not limited to one or more of propylene glycol, glycerol, sorbitol, mannitol, polyethylene glycol, butyl ether, ethylene glycol dimethyl ether, ethylene glycol butyl ether, propylene glycol methyl ether and 3-methoxy-3-methyl-1-butanol.

[0045] In some preferred embodiments, the other auxiliary agents include one or more of enzyme preparations, colorants, colorants, anti-redeposition agents, whitening agents, preservatives, fragrances and color stabilizers.

[0046] In a second aspect, the present invention provides a method for preparing the above-mentioned solid detergent composition, which specifically comprises the following steps: 1) mixing a majority of polyether nonionic surfactants and water to prepare a surfactant solution of a certain concentration, heating, and maintaining the temperature.

[0047] In some preferred implementation cases, in step 1), the mass concentration of the polyether nonionic surfactant in the solution is 20-60%.

[0048] In some preferred implementation cases, in step 1), the pH of the solution is adjusted to 6-9 before heating.

[0049] In some preferred implementation cases, in step 1), the temperature after heating is 70-95°C.

[0050] 2) mixing the structurable component with a small amount of polyether nonionic surfactant and organic alcohol ether solvent, heating to melt and dissolve them, and slowly adding the melt to the solution obtained in step 1) under homogenizing conditions to fully emulsify them to form an O / W emulsion.

[0051] In some preferred implementation cases, in step 2), the particle size of the emulsion droplets in the O / W emulsion needs to be roughly uniform, within the range of 10 to 100 μm, preferably within the range of 10 to 50 μm.

[0052] 3) Cool down under homogenization conditions, add other optional additives, and make up the water.

[0053] In some preferred implementation cases, in step 3), the cooling rate is 0.5-2.0°C / min, and the temperature after cooling is 50-80°C.

[0054] 4) The emulsion obtained in step 3) is transferred to a specific mold, cooled, and demoulded to obtain a solid detergent composition.

[0055] Specific implementation cases The present invention is further described below with reference to the Examples. Unless otherwise specified, percentages are by weight (wt%) and temperatures are in °C. "Alkyl" is a substituted or unsubstituted saturated hydrocarbon radical having from one to twenty-two carbon atoms in a straight or branched arrangement. Unless otherwise specified, an alkyl group is unsubstituted.

[0056] Unless otherwise specified, the surfactant raw materials in the following examples and comparative examples of the present invention are all pure.

[0057] AEO-3:C 12 / C 14 Alcohol polyoxyethylene ether, with an average ethoxy number of 3, was purchased from Sasol; AEO-6:C 12 / C 14 Alcohol polyoxyethylene ether, with an average ethoxy number of 3, was purchased from Sasol; AEO-9: C 12 / C 14 Alcohol polyoxyethylene ether, with an average ethoxy number of 9, was purchased from Sanjiang Chemical; EP 2325: C 16 / C 18 Alcohol propylene oxide ethylene oxide copolymer, commercially available from DOW; Hydrogenated castor oil, Guangzhou Runquan Chemical Co., Ltd., trade name HYDROGENATED CASTOR OIL (HCO).

[0058] Test Example 1-3 Test Examples 1-3 were prepared according to the following preparation method and the composition ratio of Table 1: (1) Mix 20 parts of LAS or 20 parts of AES or 20 parts of AEO-9 and 75 parts of water respectively, adjust the pH to about 8, dissolve and heat to 92°C, and keep warm; (2) Add hydrogenated castor oil, and after the hydrogenated castor oil is melted, start homogenization. After homogenization, record the particle size of the liquid after homogenization with a microscope; (3) Under homogenization conditions, start cooling at an average cooling rate of 2.0°C / min. When the temperature drops to about 40°C, discharge the sample and record the changes in the appearance of the sample during the cooling process.

[0059] Table 1: Test cases 1, 2, 3 and records of phenomena during the preparation process In the process of preparing a typical hydrogenated castor oil structurant, it was found that in the process of preparing a structurant by emulsifying hydrogenated castor oil with LAS, AES, and AEO-9, the structurants prepared by different emulsifiers had great differences in appearance. For example, the structurants prepared by LAS and AES were both ointments, while the structurant prepared by AEO-9 was a hard paste, which was similar in appearance to soap, except that it was slightly softer.

[0060] The hard paste prepared in Test Example 3 was taken out after being immersed in water for 2 hours, and there was no mushy phenomenon on the surface; after being taken out of the water and placed for half a month, obvious cracks appeared on the surface. This may be due to the high water content in Test Example 3, and the surface of the paste lost water locally during storage, resulting in cracks.

[0061] From the comparison of the results of the preparation process phenomenon records in Table 1, it can be seen that after the introduction of a structurable component (hydrogenated castor oil) into the polyether nonionic surfactant to form a structure, the final sample is a hard paste that is more like a solid. This may be because AEO-9 itself is a milky white ointment-like solid at room temperature or low temperature, and when enough structurable components are further introduced into the nonionic system to form a structurant, the spatial three-dimensional network structure formed by the structurable components greatly improves the rigidity and hardness of the original nonionic surfactant raw material itself. Based on the above principles, if you want to further improve the hardness of the paste, you can increase the content of AEO-9 or increase the content of structurable components. At the same time, considering that higher concentrations of AEO nonionic surfactants are easily dissolved in water and tend to produce gelation, in order to further increase the concentration of AEO nonionic surfactants, some organic alcohol ether solvents need to be introduced into the system.

[0062] Examples 1-6 and Comparative Example 1 Table 2: Formulations and performance tests of Examples 1-6 and Comparative Example 1 The samples of Examples 1-6 and Comparative Example 1 shown in Table 2 were prepared according to the following specific preparation method: (1) In a 60°C water bath, first add most of the AEO-9 (reserving AEO-9 with a mass ratio of 1:1 to the structurable component) and propylene glycol solvent, add the amount of 60°C hot deionized water added to the formula, stir to fully dissolve the AEO-9, adjust the pH to about 8.0, raise the temperature to 92°C, and keep warm.

[0063] (2) Mixing solid hydrogenated castor oil and remaining AEO-9 (mass ratio of 1:1), heating to about 85° C., and after the solid hydrogenated castor oil is melted, adding the obtained mixture to the mixed solution obtained in step (1), while starting the homogenizer to fully emulsify HCO in the system to form an O / W emulsion.

[0064] (3) Cooling the O / W emulsion at a cooling rate of 0.8°C / min to about 75°C to form a structure.

[0065] From the test results of Examples 1-3 in Table 2, it can be seen that after introducing propylene glycol solvent and increasing the content of AEO-9 in the system, within a certain concentration range, similar solid compositions can be formed after introducing the structurable component HCO. And from the actual sensory point of view, with the increase of AEO-9 content, the hardness of the final solid increases slightly; Examples 4-6 and Comparative Example 1 mainly investigate that increasing the content of the structurable component HCO is beneficial to the hardness of the final solid composition, but too high an amount of structurable component added (Comparative Example 1) will result in a higher hardness of the final solid composition and make it more difficult to scrub.

[0066] Comparative Examples 2-3 and Examples 7-8 Table 3: Formulas and performance tests of Comparative Examples 2, 3 and Examples 7-8 Group Comparative Example 2 (wt%) Comparative Example 3 (wt%) Example 7 (wt%) Example 8 (wt%) AEO-3 45 / / / AEO-6 / 45 / / AEO-9 / / 45 / EP2325 / / / 45 Deionized water 37 37 37 37 Propylene glycol 8 8 8 8 HCO 10 10 10 10 4h immersion test / / No muss No muss 1 month stability at 45℃ / / qualified qualified Sample appearance Soft solid Soft solid Hard solid Hard solid The general preparation methods of the samples of Comparative Examples 2-3 and Examples 7-8 in Table 3 are the same as those in Table 2.

[0067] Table 3 expands the types of emulsifier polyether nonionic surfactants. The results are surprising. The hardness of the solid compositions prepared by AEO-3 and AEO-6 with a small number of ethylene oxide additions in similar formulas is not as good as that of AEO-9, while the use of higher carbon chains such as C16 / C18 alcohol polyether surfactants (EP2325) has similar performance to AEO-9. It is speculated that this may be because the raw materials of AEO-3 and AEO-6 have lower freezing points, so they are low-viscosity liquids at room temperature, while AEO-9 and EP2325 are solid at room temperature or low temperatures. It is speculated that polyether nonionic surfactants that are close to solid at room temperature are more suitable as emulsifiers in the present invention. Therefore, nonionic surfactants that are solid at low temperatures or room temperature are preferred, and the melting point is preferably greater than 20°C.

[0068] Examples 9-11 and Comparative Example 4 Table 4: Examples 9-11 and Comparative Example 4 The samples of Examples 9-11 and Comparative Example 4 shown in Table 4 were prepared according to the following specific preparation method: (1) In a 60°C water bath, first add 40 parts of EP2325 and 5 parts of propylene glycol solvent, then add 30 parts of 60°C hot deionized water, stir to fully dissolve EP2325, adjust the pH to about 8.0, raise the temperature to 92°C, and keep warm.

[0069] (2) 10 parts of polyamide wax powder, 5 parts of EP2325 and 10 parts of propylene glycol are mixed and heated to 90°C to melt the polyamide wax powder. Under homogenization conditions, the melted product is slowly added to the mixed solution obtained in step (1) to fully emulsify the polyamide wax powder to form an O / W emulsion with an average particle size of 10 to 50 μm.

[0070] (3) Under homogenization conditions, the O / W emulsion was cooled to about 70°C at a cooling rate of 1.0°C / min, and the water volume was replenished.

[0071] (4) The emulsion in step (3) is transferred to a specific mold, and allowed to cool naturally. After cooling and demoulding, a solid detergent composition can be obtained.

[0072] Table 4 expands the optional structurable ingredients to polyamide wax powders with different melting points. The results show that different polyamide wax powders can form hard solid compositions similar to hydrogenated castor oil. However, since the boiling point of polyamide wax is higher than 100°C, it needs to be pre-dissolved and activated with some solvents in the formula. At the same time, the melting point of polyamide wax powder is too high, which seems to cause the hardness of the final sample to be too hard and not suitable for actual hand washing applications. Therefore, the melting point of polyamide wax powder is preferably 100-130°C.

[0073] 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.

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

Claims

1. A solid detergent composition, characterized in that The following raw materials are included in the following mass percentages: Structuring ingredients 5~20%, Polyether nonionic surfactant 15~60%, Organic alcohol ether solvent 0.1~20%, Other additives 0~10%, water; The structurable component is a rheology modifier which can be dispersed in an aqueous solution to form a spatial network structure and has thixotropic properties.

2. The solid detergent composition according to claim 1, characterized in that The following raw materials are included in the following mass percentages: Structuring ingredients 8~15%, Polyether nonionic surfactant 25~50%, Organic alcohol ether solvent 0.1~20%, Other additives 0~10%, water.

3. The solid detergent composition according to claim 1 or 2, characterized in that: The structurable ingredients include one or more of hydrogenated castor oil and polyamide wax.

4. The solid detergent composition according to claim 3, characterized in that: The castor oil comprises hydroxyl groups, C 10 To C 22 Glycerides of alkyl or alkenyl moieties; The melting point of the polyamide wax is 110-130°C.

5. The solid detergent composition according to claim 1, characterized in that: The melting point of the polyether nonionic surfactant is greater than 20°C.

6. The solid detergent composition according to claim 1, characterized in that: The organic alcohol ether solvent includes one or more of propylene glycol, glycerol, sorbitol, mannitol, polyethylene glycol, butyl ether, ethylene glycol dimethyl ether, ethylene glycol butyl ether, propylene glycol methyl ether and 3-methoxy-3-methyl-1-butanol.

7. The solid detergent composition according to claim 1, characterized in that: The other auxiliary agents include one or more of enzyme preparations, color protection agents, colorants, anti-redeposition agents, whitening agents, preservatives, fragrances and color stabilizers.

8. A method for preparing the solid detergent composition according to any one of claims 1 to 7, characterized in that include: 1) Prepare a solution of most polyether nonionic surfactants, water, and part or all of organic alcohol ether solvents, raise the temperature, and keep the temperature constant; 2) mixing the structurable component with the remaining polyether nonionic surfactant and the remaining organic alcohol ether solvent, heating to melt, and adding the melt to the solution in step 1) under homogenization to emulsify and form an emulsion; 3) After homogenization, cool down, add other additives, and make up the water; 4) Curing.

9. The preparation method according to claim 8, characterized in that: In step 1), The mass concentration of the polyether nonionic surfactant in the solution is 20-60%; Adjust the solution pH to 6-9 before heating; The temperature after heating is 70-95°C.

10. The preparation method according to claim 8, characterized in that: In step 2), the particle size of the emulsion droplets in the emulsion is 10-100 μm; In step 3), the cooling rate is 0.5-2.0°C / min, and the temperature after cooling is 50-80°C.

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