Granular detergent composition, preparation method thereof and washing beads

Abstract

The invention discloses a granular detergent composition, a preparation method thereof and washing beads, and relates to the technical field of daily chemical washing products. The granular detergent composition is prepared from the following components in percentage by mass: 10.0%-30.0% of an anionic surfactant, 5.0%-10.0% of a nonionic surfactant, 3.0%-7.0% of an adhesive, 1.0%-3.0% of a wrapping agent and the balance of a washing assistant, the granular detergent composition is composed of an inner core and a wrapping outer layer wrapping the inner core, the inner core comprises an anionic surfactant, a nonionic surfactant, a washing assistant and an adhesive, and the wrapping outer layer is a wrapping agent; the adhesive is composed of polyethylene glycol 8000 and microcrystalline cellulose. The granular detergent composition disclosed by the invention is good in formability and solubility, and can be quickly disintegrated after meeting water, so that the problem of slow dissolution of granules is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of daily chemical washing products, and particularly to a granular detergent composition, a preparation method thereof, and a washing bead. Background Art

[0002] As a mature washing product, washing powder has the advantages of strong detergency and good washing effect. However, in the current situation where diversified washing products such as liquid laundry detergent and laundry beads are developing rapidly, washing powder products are facing severe challenges, and their market share has begun to show signs of decline. In addition, as young people gradually become the new consumer group, they have more personalized requirements for washing products, such as novel, high-end, and fashionable product forms.

[0003] In view of this, washing powder can be encapsulated in a water-soluble film to make a solid washing bead. On the one hand, the product form is novel and fashionable, and it can be quantitatively dosed for use, forming a differentiation from conventional solid detergents and being more likely to be favored by consumers. On the other hand, the solid washing bead retains excellent washing effect. Compared with liquid beads, the solid washing bead has less limitation in the application of functional components and higher compatibility, avoiding problems such as precipitation, discoloration, and attenuation of functional components in the liquid system, so as to fully achieve the corresponding functional effects and provide consumers with a better washing experience.

[0004] However, when washing powder is encapsulated in a water-soluble film to make a solid washing bead, some technical problems need to be solved. First, when encapsulating washing powder, the fine powder is light and easily falls on the edge of the water-soluble film, affecting the film sealing effect and resulting in loose film sealing, air leakage, and powder leakage. Second, washing powder has a certain alkalinity. After long-term contact with the water-soluble film, the water-soluble film becomes hard and brittle, with poor flexibility, which not only easily causes the bead to break and leak powder but also makes the solubility of the water-soluble film worse. In addition, if the powder is simply made into granules, although the problem of loose film sealing can be solved, it will bring the problem of slow granule dissolution, and the problems caused by alkalinity have not been solved. Chinese Patent CN110408483A discloses a solid powder bead detergent, which mixes powdery and granular surfactants, auxiliaries, and excipients to obtain a solid powder detergent, and then encapsulates it with a film to make a powder bead. Chinese Patent CN117089415A discloses a powder-liquid type laundry bead, which consists of a liquid cavity and a powder cavity. The liquid cavity is a washing concentrate, and the powder cavity is powdery and granular chelating agent, percarbonate, and washing aid. However, the above technical solutions do not consider the problem that the powder is likely to cause loose film sealing and air leakage and powder leakage, and there are alkaline raw materials in their powders, which will cause the film to become hard and brittle, with poor solubility, and even break and leak powder after long-term storage. Summary of the Invention

[0005] In order to overcome the disadvantages and deficiencies of the prior art, the present invention provides a granular detergent composition, a preparation method thereof, and a washing bead. The granular detergent composition uses a special binder, which not only helps in the formation of granules but also enables rapid disintegration upon contact with water, solving the problem of slow dissolution of granules. In addition, the core of the granular detergent composition is wrapped with a wrapping agent that has good compatibility with the water-soluble film, preventing the direct contact of alkaline raw materials with the water-soluble film and solving the problem that the water-soluble film becomes hard, brittle, or even ruptures when the granular detergent composition is applied in washing beads. Moreover, since the cavity of the bead encapsulates granular detergent, the problem of air leakage and powder leakage due to loose film sealing can be solved.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] In the first aspect, a granular detergent composition is provided, which is composed of the following components by mass percentage:

[0008] Anionic surfactant 10.0 - 30.0%,

[0009] Nonionic surfactant 5.0 - 10.0%,

[0010] Binder 3.0 - 7.0%,

[0011] Wrapping agent 1.0 - 3.0%,

[0012] Washing aid the balance;

[0013] The granular detergent composition consists of a core and a wrapping outer layer wrapped around the core. Among them, the core contains an anionic surfactant, a nonionic surfactant, a washing aid, and a binder, and the wrapping outer layer is a wrapping agent; the binder is composed of polyethylene glycol 8000 and microcrystalline cellulose, and the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 1:(3 - 6).

[0014] Further, the wrapping agent is composed of polyethylene glycol 6000 and sodium carboxymethylcellulose.

[0015] Further, the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose is 1:(1 - 2).

[0016] Further, the anionic surfactant is selected from at least one of sodium C12 - C18 alkylbenzenesulfonate, α-olefin sulfonate, C12 - C18 alkyl alkoxysulfate, and α-sulfofatty acid alkyl ester sulfonate.

[0017] Further, the non-ionic surfactant is selected from at least one of C12-C14 alkyl glycosides, fatty alcohol polyoxyethylene ethers with C12-C18 carbon atoms, condensates of C12-C18 alcohols and ethylene oxide / propylene oxide block copolymers, coconut oil fatty acid diethanolamide, and coconut oil fatty acid monoethanolamide.

[0018] Further, the washing aid is selected from at least one of sodium sulfate, sodium carbonate, 4A zeolite, acrylic polymers, sodium citrate, enzyme preparations, and fragrances.

[0019] In a second aspect, there is provided a method for preparing the particulate detergent composition as described in the first aspect, comprising the following steps:

[0020] A. Add the washing aid and the non-ionic surfactant into a stirring mixer, and stir and mix evenly.

[0021] B. Add the anionic surfactant and the binder into the stirring mixer, and continue to stir and mix evenly to obtain a uniform mixture.

[0022] C. Add the mixture into an extrusion machine, extrude and cut to obtain cylindrical mixtures.

[0023] D. Round the cylindrical mixtures to obtain spherical cores, control the temperature at 50-60°C, prepare the coating agent into a coating solution, spray-coat the cores with the coating solution, and dry for 30-40 minutes after spraying to obtain the coating outer layer, thereby obtaining the particulate detergent composition.

[0024] Further, in step D, preparing the coating agent into a coating solution is achieved by uniformly mixing the coating agent with water to form a coating solution with a mass concentration of 25-30%.

[0025] In a third aspect, there is provided a laundry bead, comprising the particulate detergent composition as described in the first aspect and a water-soluble film.

[0026] Further, the water-soluble film is one or more of polyvinyl alcohol homopolymers and polyvinyl alcohol copolymers, and the water-soluble film encapsulates the particulate detergent composition.

[0027] Preferably, the water-soluble film is prepared into an aqueous solution with a mass concentration of 5%, and the viscosity of the aqueous solution at a shear rate of 25°C and 5 s -1 is 20 centipoises - 30 centipoises.

[0028] The beneficial effects of the present invention are as follows:

[0029] The granular detergent composition provided by the present invention, its preparation method and the laundry detergent beads. The granular detergent composition uses a special binder, which not only helps to form granules, but also enables rapid disintegration in water, solving the problem of slow dissolution of granules. In addition, when the granular detergent composition is applied to laundry detergent beads, the core outer layer of the granular detergent composition is wrapped with a wrapping agent having good compatibility with the water-soluble film, avoiding direct contact between the alkaline raw materials and the water-soluble film, and solving the problem that the water-soluble film becomes hard, brittle or even ruptured when applied to laundry detergent beads. The granular detergent is encapsulated in the bead cavity, solving the problem of air leakage and powder leakage due to loose film sealing. Detailed Embodiments

[0030] The technical solutions in the embodiments will be described clearly and completely below. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] 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, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0032] It should also be understood that the terms used in the specification of the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present invention. As used in the specification of the embodiments of the present invention and the appended claims, unless otherwise clearly specified in the context, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0033] Unless otherwise specified, all percentages, fractions and ratios are calculated based on the total mass of the composition of the present invention. Unless otherwise specified, all masses of the listed components are given for the content of the active substances, and therefore they do not include solvents or by-products that may be contained in commercially available materials. The term "mass percentage content" in this article can be represented by the symbol "%"

[0034] The raw materials involved in the present invention can be directly purchased from the market. For the process parameters not specifically noted, conventional techniques can be referred to.

[0035] The preparation method of the granular detergent composition involved in the embodiments and comparative examples of the present invention includes the following steps:

[0036] A. Add washing aids and non-ionic surfactants into a stirring mixer and stir and mix evenly;

[0037] B. Add an anionic surfactant and a binder into a stirring mixer, and continue to stir and mix evenly to obtain a uniform mixture.

[0038] C. Add the mixture into an extrusion granulator, extrude and cut to obtain cylindrical mixture.

[0039] D. Round the cylindrical mixture to obtain a spherical core, control the temperature at 55 °C, prepare the coating agent into a coating solution and spray-coat the core, and dry for 35 min after spraying to obtain the coated outer layer, thus obtaining the granular detergent composition.

[0040] Among them, in step D, preparing the coating agent into a coating solution is to mix the coating agent and water evenly to prepare a coating solution with a mass concentration of 28%.

[0041] The washing aid of the present invention is selected from at least one of sodium sulfate, sodium carbonate, 4A zeolite, acrylic polymer, sodium citrate, enzyme preparation, and essence. The enzyme preparation can include one or more kinds, which are used to improve the detergency of the product and bring other effects beneficial to fabric care. The enzyme preparation is selected from the following enzymes: protease, α-amylase, cellulase, hemicellulase, phospholipase, esterase, lipase, peroxidase / oxidase, pectinase, lyase, mannanase, cutinase, reductase, xylanase, pullulanase, tannase, pentosanase, maltodextrin, arabinase, β-glucanase, and one of them is preferably protease. Suitable proteases include but are not limited to Savinase 16L, Savinase Ultra16XL, Savinase Evity16L, Progress Uno 101L, Progress Uno 100L of Novozymes, Effectenz P150, Preferenz P200, Preferenz P300 of DuPont, and Lavergy 104L, 104LS of BASF.

[0042] The non-ionic surfactant of the present invention is selected from at least one of C12-C14 alkyl glycosides, C12-C18 fatty alcohol polyoxyethylene ethers, condensates of C12-C18 alcohols and ethylene oxide / propylene oxide block copolymers, coconut oil fatty acid diethanolamide, and coconut oil fatty acid monoethanolamide.

[0043] In some embodiments, the non-ionic surfactant preferably contains a fatty alcohol alkoxylate, and the fatty alcohol alkoxylate has the following general formula:

[0044]

[0045] Among them, n is 8 to 20; x is 0.5 to 30, and y is 0 to 10.

[0046] The fatty alcohol alkoxylate described is a product of the ring-opening polymerization of fatty alcohol and alkylene oxide under the action of a basic catalyst and is basically a mixture.

[0047] The fatty alcohol includes straight-chain alcohol or branched isomeric alcohol. The alkoxy group includes ethoxy group and propoxy group. The fatty alcohol is preferably a fatty alcohol with 12 to 18 carbon atoms. The preferred alcohols include, but are not limited to, one or more of hexanol, octanol, decanol, 2-ethylhexanol, 3-propylheptanol, lauryl alcohol, isotridecanol, tridecanol, tetradecanol, hexadecanol, palmoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, linoleyl alcohol, and linolenyl alcohol. The average degree of ethoxylation x is preferably 2 to 12. The preferred fatty alcohol alkoxylates are the NEODOL series of straight-chain fatty alcohol ethoxylates products of SHELL, the ECOSURF EH series of ethoxylated and propoxylated 2-ethylhexanol products of DOW, the Lutensol XL series of ethoxylated and propoxylated 3-propylheptanol products of BASF, the Lutensol TO series of ethoxylated isomeric tridecanol products of BASF, and the Lutensol XP series of ethoxylated 3-propylheptanol products of BASF.

[0048] The anionic surfactant of the present invention is selected from at least one of sodium C12-C18 alkylbenzene sulfonate, α-olefin sulfonate, C12-C18 alkyl alkoxysulfate, and α-sulfo fatty acid alkyl ester sulfonate.

[0049] In some embodiments, the anionic surfactant contains ethoxylated fatty alcohol sulfate.

[0050] Ethoxylated fatty alcohol sulfate is a derivative of ethoxylated fatty alcohol and has the following general formula:

[0051]

[0052] wherein R1 is an alkyl group with 12 to 18 carbon atoms; x is 0.5 to 30; wherein M+ is a cation, such as sodium ion, potassium ion, ammonium ion, etc. R1 can be a straight-chain alkyl group or a branched alkyl group; it can be a saturated alkyl group or an alkyl group containing one or more unsaturated double bonds. Preferably, R1 is a straight-chain alkyl group with 12 to 18 carbon atoms. x represents the average degree of ethoxylation and is 0.5 to 30, preferably 0.5 to 10, more preferably 0.5 to 3. The preferred ethoxylated fatty alcohol sulfate is Texapon N70 of BASF.

[0053] The binder of the present invention is composed of polyethylene glycol 8000 and microcrystalline cellulose, and the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 1:(3-6).

[0054] The encapsulant of the present invention is composed of polyethylene glycol 6000 and sodium carboxymethylcellulose, and the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose is 1:(1-2).

[0055] In the present invention, the laundry beads involved in the examples and comparative examples are prepared by encapsulating a particulate detergent composition with a water-soluble film. The water-soluble film is a polyvinyl alcohol homopolymer.

[0056] The water-soluble film is made into an aqueous solution with a mass concentration of 5%. The viscosity of this aqueous solution at a shear rate of 25°C and 5 s -1 is 20 centipoises - 30 centipoises. Under these parameters, the water-soluble film has good solubility, stability and compatibility, and is more excellent for the overall performance of the laundry beads.

[0057] Performance testing method

[0058] 1. Stability test of the laundry bead film

[0059] High temperature stability: The laundry beads are stored in an open state in a constant temperature air-circulating oven at 45±1°C for 4 weeks, and then taken out from the constant temperature and humidity box for observation. If the film does not become hard and brittle, does not crack, and there is no air leakage or powder leakage, the stability is qualified.

[0060] High temperature and high humidity stability: The laundry beads are sealed in a high-density polyethylene (HDEP) bag and stored in an environment of 45±1°C and 70%-80% relative humidity for 8 weeks, and then taken out from the constant temperature and humidity box for observation. If the film does not become hard and brittle, does not crack, and there is no air leakage or powder leakage, the stability is qualified.

[0061] 2. Solubility test of the particulate detergent and the laundry beads

[0062] 1) Add 1000 mL of tap water to a beaker, measure the water temperature with a thermometer, and adjust the water temperature to 25°C;

[0063] 2) Place a magnetic rotor in the beaker, turn on the magnetic stirrer, and adjust the rotation speed so that the height of the vortex generated is one-third of the water column height;

[0064] 3) Start the timer while putting 1 g of the particulate detergent or 1 laundry bead into the water, and stop the timer when the particulate detergent or the laundry bead is completely dissolved, and record the dissolution time.

[0065] 3. Detection of the formability of the particulate detergent

[0066] Place 5 g of the particulate detergent in a vibrating sieve and vibrate it at a frequency of 30 Hz for 1 minute, and observe the formability of the particles. If the particles are intact, the formability is good; if the particles are loose and broken, the formability is poor.

[0067] Examples and comparative examples

[0068] In the examples and comparative examples, the following abbreviations will be used and have the indicated functions.

[0069] LAS: C 12 ~C 18 Sodium alkylbenzene sulfonate, an anionic surfactant.

[0070] AES: C 12 ~C 14 Sodium lauryl ether sulfate with an average ethoxylation degree of 2, an anionic surfactant.

[0071] AOS: Sodium α-olefin sulfonate, an anionic surfactant.

[0072] MES: α-Sulfo fatty acid alkyl ester sulfonate, an anionic surfactant.

[0073] AEO9: C 12 ~C 18 Fatty alcohol polyoxyethylene ether, a non-ionic surfactant.

[0074] APG: C 12 ~C 14 Alkyl polyglycoside, a non-ionic surfactant.

[0075] Acrylic polymer: Sodium polyacrylate Mw = 3000 - 20000.

[0076] The formulations and performance test results of the granular detergent compositions of Examples 1 - 3 and Comparative Examples 1 - 4 are shown in Table 1 below. Among them, the difference between the examples and the comparative examples lies only in the formulations of the granular detergent compositions, and the remaining conditions (preparation conditions) are the same.

[0077] Table 1 Formulation composition (mass percentage, %) and test results of the granular detergent compositions of Examples 1 - 3 and Comparative Examples 1 - 4

[0078]

[0079]

[0080] As can be seen from Table 1, the granular detergent compositions of the examples and comparative examples are all systems with 10% anionic surfactant and 5% nonionic surfactant. Example 1 contains 7% binder, in which the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 1:6. Example 2 contains 5% binder, in which the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 1:4. Example 3 contains 3% binder, in which the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 1:3. The granular detergent compositions prepared in the three examples have good formability and fast dissolution rate. Comparative Example 1 contains 6% binder. Although the content is appropriate, the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 1:2, and the former accounts for a relatively high proportion. Although the granular detergent composition prepared has good formability, the dissolution rate is greatly reduced. Comparative Example 2 contains 4% binder. Although the content is appropriate, the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 1:7, and the latter accounts for a relatively high proportion, resulting in poor formability of the granular detergent composition prepared, and the particles are loose and broken. Comparative Example 3 contains 2% binder, and the content is low, resulting in poor formability of the granular detergent composition prepared, and the particles are loose and broken. Comparative Example 4 contains 8% binder, and the content is high. Although the granular detergent composition prepared has good formability, the dissolution rate is greatly reduced. Therefore, in the granular detergent composition of the present invention, the mass percentage of the binder is preferably 3.0 - 7.0%, and the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose in the binder is preferably 1:(3 - 6).

[0081] The formulations and performance test results of the granular detergent compositions of Examples 4 - 6 and Comparative Examples 5 - 8 are shown in Table 2 below. Among them, the difference between the examples and the comparative examples lies only in the formulation of the granular detergent composition, and the remaining conditions (preparation conditions) are the same.

[0082] Table 2 Formulation composition (mass percentage, %) and test results of the granular detergent compositions of Examples 4 - 6 and Comparative Examples 5 - 8

[0083]

[0084]

[0085] As can be seen from Table 2, the granular detergent compositions of the examples and comparative examples are all systems with 20% anionic surfactant and 8% non-ionic surfactant. Example 4 contains 6% binder, in which the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 1:5. Example 5 contains 4.5% binder, in which the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 1:4. Example 6 contains 4% binder, in which the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 1:3. The granular detergent compositions prepared from the three examples have good formability and fast dissolution rate. Comparative Example 5 contains 4% binder. Although the content is appropriate, the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 1:1, and the former accounts for a relatively high proportion. Although the granular detergent composition prepared has good formability, the dissolution rate is greatly reduced. Comparative Example 6 contains 4.5% binder. Although the content is appropriate, the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 1:8, and the latter accounts for a relatively high proportion, resulting in poor formability of the granular detergent composition prepared, and the particles are loose and broken. Comparative Example 7 contains 1.5% binder, and the content is low, resulting in poor formability of the granular detergent composition prepared, and the particles are loose and broken. Comparative Example 8 contains 9% binder, and the content is high. Although the granular detergent composition prepared has good formability, the dissolution rate is greatly reduced. Therefore, in the granular detergent composition of the present invention, the mass percentage of the binder is preferably 3.0-7.0%, and the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose in the binder is preferably 1:(3-6).

[0086] The formulations and performance test results of the granular detergent compositions of Examples 7-9 and Comparative Examples 9-12 are shown in Table 3 below. Among them, the difference between the examples and the comparative examples lies only in the formulation of the granular detergent composition, and the other conditions (preparation conditions) are the same.

[0087] Table 3 Formulation composition (mass percentage, %) and test results of the granular detergent compositions of Examples 7-9 and Comparative Examples 9-12

[0088]

[0089]

[0090] As can be seen from Table 3, the granular detergent compositions of the examples and comparative examples are all systems containing 30% anionic surfactant and 10% nonionic surfactant. Example 7 contains 3.5% binder, in which the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 1:4. Example 8 contains 5.5% binder, in which the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 1:4. Example 9 contains 6.5% binder, in which the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 1:4. The granular detergent compositions prepared in the 3 examples have good formability and fast dissolution rate. Comparative Example 9 contains 3% binder. Although the content is appropriate, the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 2:1, and the former accounts for a relatively high proportion. Although the granular detergent composition prepared has good formability, the dissolution rate is greatly reduced. Comparative Example 10 contains 5% binder. Although the content is appropriate, the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 1:9, and the latter accounts for a relatively high proportion, resulting in poor formability of the granular detergent composition prepared, and the particles are loose and broken. Comparative Example 11 contains 1% binder, and the content is too low, resulting in poor formability of the granular detergent composition prepared, and the particles are loose and broken. Comparative Example 12 contains 10% binder, and the content is too high. Although the granular detergent composition prepared has good formability, the dissolution rate is greatly reduced. Therefore, in the granular detergent composition of the present invention, the mass percentage of the binder is preferably 3.0 - 7.0%, and the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose in the binder is preferably 1:(3 - 6).

[0091] The formulations and performance test results of the granular detergent compositions of Examples 10 - 15 are shown in Table 4 below. Among them, the difference between the examples lies only in the formulation of the granular detergent composition, and the other conditions (preparation conditions) are the same.

[0092] Table 4 Formulation composition (mass percentage, %) and test results of the granular detergent compositions of Examples 10 - 15

[0093]

[0094]

[0095]

[0096] As can be seen from Table 4, the granular detergent compositions with different surfactant contents and different washing aid contents are prepared in Examples 10 - 15. Under the condition that the binder content and mass ratio meet the specified range of the present invention, the granular detergent compositions prepared in Examples 10 - 15 have good formability and fast dissolution rate.

[0097] The washing beads of the test examples were prepared by encapsulating the particulate detergent composition with a water-soluble film. As shown in Table 5 below, the formulations (mass percentages, %) of the particulate detergent compositions in the washing beads of Test Examples 1-4 and Control Examples 1-3, and the test results of the washing beads. Among them, the difference between the test examples and the control examples lies only in the formulation of the particulate detergent composition, and the other conditions (preparation conditions) are the same.

[0098] Table 5 Formulation composition (mass percentage, %) of the particulate detergent composition in the washing beads of Test Examples 1-3 and Control Examples 1-4 and test results of the washing beads

[0099]

[0100]

[0101] As can be seen from Table 5, the particulate detergent compositions in the washing beads of the test examples and the control examples are both systems of 10% anionic surfactant and 5% nonionic surfactant. Test Example 1 contains 1% encapsulant, in which the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose is 1:1. Test Example 2 contains 2% encapsulant, in which the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose is 1:1. Test Example 3 contains 3% encapsulant, in which the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose is 1:2. The film stabilities of the washing beads prepared in the 3 test examples are normal and the dissolution rates are fast. Control Example 1 contains 3% encapsulant. Although the content is appropriate, the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose is 2:1, and the former accounts for a relatively high proportion, resulting in over-encapsulation and significantly reducing the overall dissolution rate of the washing beads. Control Example 2 contains 2% encapsulant. Although the content is appropriate, the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose is 1:3, and the latter accounts for a relatively high proportion, resulting in insufficient encapsulation and the contact of the alkaline component with the film, causing the film to become hard and brittle and the film solubility to deteriorate, resulting in a significant reduction in the overall dissolution rate of the washing beads. Control Example 3 contains 0.5% encapsulant, and the content is low, resulting in insufficient encapsulation and the contact of the alkaline component in the particulate detergent composition with the film, causing the film to become hard and brittle and the film solubility to deteriorate, resulting in a significant reduction in the overall dissolution rate of the washing beads. Control Example 4 contains 4% encapsulant, and the content is high, resulting in over-encapsulation and significantly reducing the overall dissolution rate of the washing beads. Therefore, in the particulate detergent composition of the washing beads of the present invention, the mass percentage of the encapsulant is preferably 1.0-3.0%, and the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose in the encapsulant is 1:(1-2).

[0102] As shown in Table 6 below, Test Examples 4-6 and Control Examples 5-8 are the formulations (mass percentages, %) of the granular detergent composition in the laundry beads and the test results of the laundry beads. Among them, the difference between the test examples and the control examples lies only in the formulation of the granular detergent composition, and the remaining conditions (preparation conditions) are the same.

[0103] Table 6 Formulation composition (mass percentage, %) of the granular detergent composition in the laundry beads of Test Examples 4-6 and Control Examples 5-8 and test results of the laundry beads

[0104]

[0105]

[0106] As can be seen from Table 6, the granular detergent compositions in the laundry beads of the test examples and the control examples are both systems of 20% anionic surfactant and 8% nonionic surfactant. Test Example 4 contains 3% coating agent, in which the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose is 1:1. Test Example 5 contains 1.5% coating agent, in which the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose is 1:1.5. Test Example 6 contains 2.5% coating agent, in which the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose is 1:1.5. The film stability of the laundry beads prepared in the 3 test examples is normal and the dissolution rate is fast. Control Example 5 contains 3% coating agent. Although the content is appropriate, the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose is 5:1, and the former accounts for a relatively high proportion, resulting in over-firm wrapping and significantly reducing the overall dissolution rate of the laundry beads. Control Example 6 contains 2% coating agent. Although the content is appropriate, the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose is 1:4, and the latter accounts for a relatively high proportion, resulting in insufficient wrapping and allowing the alkaline components of the granular detergent composition to contact the film, causing the film to become hard and brittle and the film solubility to deteriorate, resulting in a significant reduction in the overall dissolution rate of the laundry beads. Control Example 7 contains 0.6% coating agent, and the content is too low, resulting in insufficient wrapping and allowing the alkaline components to contact the film, causing the film to become hard and brittle and the film solubility to deteriorate, resulting in a significant reduction in the overall dissolution rate of the laundry beads. Control Example 8 contains 5% coating agent, and the content is too high, resulting in over-firm wrapping and significantly reducing the overall dissolution rate of the laundry beads. Therefore, in the granular detergent composition of the laundry beads of the present invention, the mass percentage of the coating agent is preferably 1.0-3.0%, and the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose in the coating agent is 1:(1-2).

[0107] As shown in Table 7 below, Test Examples 7-9 and Control Examples 9-12 are the formulations (mass percentages, %) of the granular detergent composition in the laundry beads and the test results of the laundry beads. Among them, the difference between the test examples and the control examples lies only in the formulation of the granular detergent composition, and the remaining conditions (preparation conditions) are the same.

[0108] Table 7 Formulation composition (mass percentage, %) of the granular detergent composition in the laundry beads of Test Examples 7-9 and Control Examples 9-12 and test results of the laundry beads

[0109]

[0110]

[0111] As can be seen from Table 7, the granular detergent compositions in the laundry beads of the test examples and the control examples are both systems of 30% anionic surfactant and 10% non-ionic surfactant. Test Example 7 contains 2.7% of the encapsulant, in which the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose is 1:1.25. Test Example 8 contains 2.2% of the encapsulant, in which the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose is 1:1.2. Test Example 9 contains 2% of the encapsulant, in which the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose is 1:1.5. The film stabilities of the laundry beads prepared in the 3 test examples are normal and the dissolution rates are fast. Control Example 9 contains 2.5% of the encapsulant. Although the content is appropriate, the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose is 4:1, and the former accounts for a relatively high proportion, resulting in over-encapsulation and significantly reducing the overall dissolution rate of the laundry beads. Control Example 10 contains 2.4% of the encapsulant. Although the content is appropriate, the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose is 1:5, and the latter accounts for a relatively high proportion, resulting in insufficient encapsulation and the contact of the alkaline component with the film, causing the film to become hard and brittle and the film solubility to deteriorate, resulting in a significant reduction in the overall dissolution rate of the laundry beads. Control Example 11 contains 0.8% of the encapsulant, and the content is too low, resulting in insufficient encapsulation and the contact of the alkaline component of the granular detergent composition with the film, causing the film to become hard and brittle and the film solubility to deteriorate, resulting in a significant reduction in the overall dissolution rate of the laundry beads. Control Example 12 contains 6% of the encapsulant, and the content is too high, resulting in over-encapsulation and significantly reducing the overall dissolution rate of the laundry beads. Therefore, in the granular detergent composition of the laundry beads of the present invention, the mass percentage of the encapsulant is preferably 1.0-3.0%, and the mass ratio of polyethylene glycol 6000 to sodium carboxymethylcellulose in the encapsulant is 1:(1-2).

[0112] In the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0113] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A granular detergent composition, characterized in that By mass percentage, it is composed of the following ingredients: Anionic surfactant 10.0~30.0%, Nonionic surfactant 5.0~10.0%, Adhesive 3.0~7.0%, Encapsulating agent 1.0~3.0%, Detergent residue; The granular detergent composition consists of an inner core and an outer layer wrapped around the inner core, wherein the inner core contains an anionic surfactant, a nonionic surfactant, a detergent builder and an adhesive, and the outer layer is an encapsulating agent; the adhesive consists of polyethylene glycol 8000 and microcrystalline cellulose, and the mass ratio of polyethylene glycol 8000 to microcrystalline cellulose is 1:(3-6).

2. A granular detergent composition according to claim 1, characterized in that The encapsulating agent consists of polyethylene glycol 6000 and sodium carboxymethyl cellulose.

3. A granular detergent composition according to claim 2, characterized in that The mass ratio of the polyethylene glycol 6000 to the sodium carboxymethyl cellulose is 1:(1-2).

4. The granular detergent composition according to claim 1, characterized in that The anionic surfactant is selected from at least one of C12-C18 sodium alkylbenzene sulfonate, α-olefin sodium sulfonate, C12-C18 alkyl alkoxy sulfate, and α-sulfonated fatty acid alkyl ester sulfonate.

5. The granular detergent composition according to claim 1, characterized in that The nonionic surfactant is selected from at least one of C12-C14 alkyl glucoside, C12-C18 fatty alcohol polyoxyethylene ether, condensation product of C12-C18 alcohol and ethylene oxide / propylene oxide block copolymer, coconut oil fatty acid diethanolamide, and coconut oil fatty acid monoethanolamide.

6. The granular detergent composition according to claim 1, characterized in that The detergent aid is selected from at least one of sodium sulfate, sodium carbonate, 4A zeolite, acrylic acid polymer, sodium citrate, enzyme preparation and essence.

7. A method for preparing a granular detergent composition according to any one of claims 1 to 6, characterized in that: The steps include: A. Add detergent additives and nonionic surfactants into the stirring mixer and stir to mix evenly; B. Add anionic surfactant and adhesive into the stirring mixer, continue stirring and mixing to obtain a uniform mixture; C. Add the mixed material into an extruder, extrude and cut to obtain a cylindrical mixed material; D. Rounding the cylindrical mixture to obtain a spherical inner core, controlling the temperature at 50-60° C., preparing the coating agent into a coating liquid to spray the inner core, and drying for 30-40 minutes after spraying to obtain a coating outer layer, that is, obtaining the granular detergent composition.

8. The method for preparing a granular detergent composition according to claim 7, characterized in that: In step D, the encapsulating agent is prepared into an encapsulating liquid by uniformly mixing the encapsulating agent with water to prepare an encapsulating liquid with a mass concentration of 25 to 30%.

9. A washing condensate bead, characterized in that: The invention comprises a granular detergent composition according to any one of claims 1 to 6 and a water-soluble film.

10. The washing beads according to claim 9, characterized in that The water-soluble film is one or more of polyvinyl alcohol homopolymer and polyvinyl alcohol copolymer, and the water-soluble film encapsulates the granular detergent composition.

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