Softening stain-removing particle and stubborn stain-removing washing powder

Abstract

The invention relates to the field of detergents, and discloses softening stain-removing particles and stubborn stain-removing washing powder. The softening and stain-removing particles comprise 5-20% of modified silicone oil, 0-10% of an enzyme preparation, 0-2.5% of a whitening agent, 40-85% of anhydrous sodium sulphate and 5-30% of white carbon black. The stubborn stain removing washing powder comprises 2-10% of smooth stain removing particles, 20-60% of sodium percarbonate, 0-6.0% of a bleaching activator, 0-50% of an alkaline auxiliary agent, 0-5% of a chelating agent, 0.5-10% of a surfactant and anhydrous sodium sulphate. The modified silicone oil, the enzyme preparation and the whitening agent are prepared into smooth stain-removing particles, and then the smooth stain-removing particles are added into the stubborn stain-removing washing powder containing the sodium percarbonate. In the system, the negative influence between the sodium percarbonate and the auxiliaries is small, so that the stubborn stain removing washing powder not only has an excellent removal effect on stubborn stains, but also has an excellent softening effect.

Description

Technical Field

[0001] The invention relates to the field of detergents, and in particular to a kind of soft stain removing particles and a stubborn stain removing washing powder. Background Art

[0002] At present, the mainstream laundry detergents are mainly washing powder, laundry liquid, laundry soap, laundry beads, etc. These detergents are generally broad-spectrum stain removers and have good removal effects on common daily stains, but they are generally ineffective in removing stubborn stains, such as heavy oil stains, yellowing of clothes due to long-term storage, fruit juice, pigments, etc., which is also a pain point for consumers in washing. Therefore, in recent years, washing products such as foam washing powder and oxygen bleaching powder with sodium percarbonate (which releases active oxygen when in contact with water) as the main ingredient have appeared on the market. They remove stubborn stains through oxidative bleaching, with good stain removal effects and strong stain removal power.

[0003] As mentioned above, the formula of existing oxygen bleaching powder detergent products with good removal ability for stubborn stains is mainly based on sodium percarbonate and soda ash, and the alkalinity is very high, so it is easy to damage the clothing fibers after repeated washing, causing the clothes to become hard. Quaternary ammonium salts, silicones, etc. are currently effective fabric softeners, but they are generally added to neutral detergents. It is difficult to add them to the highly alkaline and strong oxidizing system of oxygen bleaching powder. After addition, it is easy to change color and taste. At the same time, the stability of the active oxygen in the formula after its interaction with it is greatly reduced, further affecting the product's stain removal effect.

[0004] On the other hand, it is usually difficult to add high-efficiency stain removal aids such as enzyme preparations and brighteners to the above-mentioned oxygen bleaching powder detergent products with sodium percarbonate as the main ingredient for colored and yellowing stains. The reason is that the formula system easily causes the enzyme activity to decrease, and the brightener is also easily oxidized, causing the powder to change color and taste.

[0005] For the above reasons, currently available oxygen bleaching powder (detergent for stubborn stain removal) containing sodium percarbonate on the market generally does not add softeners, enzyme preparations, whitening agents, etc., and does not have a softening effect. Clothes tend to become hard after washing. And it is mainly used for colored yellowing stains. Carbon black and protein stains are difficult to remove. Even if the above additives are added, it is difficult to achieve the desired effect. Summary of the invention

[0006] In order to solve the above technical problems, firstly, the present invention provides a kind of soft stain removal particles. The present invention finds that a modified silicone oil still has a good softening effect in the alkaline environment of stubborn stain removal washing powder, and mixes it with enzyme preparations and brighteners to form soft stain removal particles, so that it can be stably present in stubborn stain removal washing powder. Secondly, the present invention provides a kind of stubborn stain removal washing powder. The stubborn stain removal washing powder of the present invention uses sodium percarbonate as the main component, and also contains softeners (modified silicone oil), enzyme preparations, brighteners and other auxiliary agents that are usually difficult to coexist with sodium percarbonate or alkaline systems. The negative impact between sodium percarbonate and the above auxiliary agents in the formula of the present invention is small, so the obtained stubborn stain removal washing powder not only has an excellent removal effect on stubborn stains, but also has an excellent softening effect.

[0007] The specific technical scheme of the present invention is: In the first aspect, the present invention provides a soft stain-removing particle comprising the following raw materials in percentage by mass: 5-20% modified silicone oil, 0-10% (preferably 2-10%) enzyme preparation, 0-2.5% (preferably 0.5-2.5%) brightener, 40-85% sodium sulfate, and 5-30% white carbon black.

[0008] Among them, sodium sulphate and white carbon black are wrapped on the surface of a mixture of modified silicone oil, enzyme preparation and whitening agent.

[0009] The structural formula of modified silicone oil is as follows: Wherein, x, y, z are positive integers, and R is -OH or -CH3, X=C m H 2m , m is 1-4.

[0010] In the above-mentioned soft stain removal particles of the present invention: (1) Regarding the problem of clothing becoming hard under high active oxygen and high alkalinity system conditions: As described in the background technology section, current stubborn stain removal laundry detergents generally use high active oxygen and high alkalinity systems, with sodium percarbonate and soda ash as the main stain removal ingredients, and remove stubborn stains through oxidation bleaching, alkali neutralization and degreasing. However, high alkalinity substances will destroy the hydrogen bonds between clothing fibers, and at the same time catalyze and hydrolyze the fibers, causing clothing fibers to deform, shrink, harden, and be damaged. Although ordinary silicone has a certain fabric softening effect, it has poor durability and poor emulsion stability. It is easy to demulsify and bleach oil, which can easily cause fabrics to be contaminated and have oil spots during use. In addition, the formula of stubborn stain removal laundry detergent with high oxidation and high alkalinity system will accelerate its demulsification and become more unstable.

[0011] To this end, the present invention provides a modified silicone oil having the above-mentioned ternary copolymer structure, which is connected to an alkyl bridging group through a polymerization section, and the molecular structure and molecular weight of the bridging part are controlled at the same time, so that the structure between the silicon atom and the amino group is more balanced, so that the amino group is more firmly combined. And its unique ternary copolymer structure ensures the high molecular weight of the modified silicone oil. The higher the molecular weight, the greater the viscosity, the better the film-forming property of the modified silicone oil on the surface of the fabric, the softer the feel, and the better the elasticity. However, silicone oil with excessive viscosity is difficult to emulsify and disperse, and it is difficult to operate in actual production, so it is necessary to control a reasonable molecular weight range. The amino group is further introduced into the modified silicone oil structure, which has a stronger polarity, can interact with the hydroxyl and carboxyl groups on the fiber surface, and is very firmly oriented and adsorbed on the fiber. In addition, the Si-O bond main chain and the methyl group on the silicon atom play a physical isolation role, which reduces the static friction coefficient between the fibers and gives the fabric a soft effect.

[0012] In addition, after the modified silicone oil is adsorbed on the fiber, carbonic acid formed by carbon dioxide and water in the air cross-links with amino groups, forming a highly polymerized elastic network structure on the fiber surface and inside, thereby giving the fabric a super soft effect and excellent washing resistance. Therefore, compared with ordinary silicone oil, it has a better fabric softening effect and is more stable in the strong stain washing powder system.

[0013] However, the present invention has found that under the conditions of long-term stability investigation, the above-mentioned modified silicone oil will also experience a certain degree of softness reduction and discoloration. Therefore, the present invention further produces a kind of soft stain removal particles, the modified silicone oil is made into particles by encapsulation and granulation, and the particles are added to the formula of stubborn stain removal laundry detergent, which can further avoid the modified silicone oil from directly contacting with active oxygen, alkaline substances, etc., thereby maintaining the stability of each raw material. The encapsulating material uses neutral white carbon black and sodium sulfate. Among them, white carbon black has a very large specific surface area and dispersion ability, and its extremely strong water and oil absorption properties can be used to encapsulate the modified silicone oil.

[0014] (2) In view of the problem that raw materials such as enzyme preparations and brighteners are unstable and easy to decompose under high active oxygen and high alkaline system conditions: Enzyme preparations, brighteners and other washing aids are relatively less stable than other raw materials and are easily oxidized and deteriorated, resulting in decreased enzyme activity and broken brightener structure, thereby reducing the detergency of the product, and also causing problems such as discoloration and taste change. Therefore, the present invention uses encapsulation and granulation to make soft stain removal particles with enzyme preparations, brighteners and modified silicone oil, and then adds the particles to the formula of stubborn stain removal laundry detergent, thereby avoiding direct contact between enzyme preparations, brighteners, and modified silicone oils and oxidants and alkaline substances to cause oxidative decomposition, thereby ensuring that they are stably present in the formula and continue to exert their efficacy, ensuring strong stain removal and good softening effect of the formula. Moreover, after adding various enzyme preparations, the stain removal range is wider.

[0015] In summary, the modified silicone oil of the present invention still has a good softening effect in the alkaline environment of stubborn stain removing laundry detergent, and is mixed with an enzyme preparation and a whitening agent to form softening stain removing particles, so that it can be stably present in stubborn stain removing laundry detergent containing sodium percarbonate.

[0016] Preferably, in the modified silicone oil: x is preferably 100 to 150, y is preferably 50 to 70, and z is preferably 450 to 550. More preferably, in the modified silicone oil, the parameters are as follows: R=OH, m=1, X=CH2, x=134, y=67, z=536; Or R=OH, m=2, X=CH2CH2, x=132, y=66, z=528; Or R=OH, m=3, X=CH2CH2CH2, x=128, y=64, z=512; Or R=OH, m=3, X=CH(CH3)CH2, x=128, y=64, z=512; Or R=OH, m=4, X=CH2CH2CH2CH2, x=126, y=63, z=504; Or R=OH, m=4, X=CH2CH(CH3)CH2, x=126, y=63, z=504; Or R=OH, m=4, X=CH(CH3)CH2CH2, x=126, y=63, z=504; Or R=OH, m=4, X=C(CH3)2CH2, x=126, y=63, z=504; Or R=CH3, m=1, X=CH2, x=134, y=67, z=536; Or R=CH3, m=2, X=CH2CH2, x=132, y=66, z=528; Or R=CH3, m=3, X=CH2CH2CH2, x=130, y=65, z=520; Or R=CH3, m=3, X=CH(CH3)CH2, x=130, y=65, z=520; Or R=CH3, m=4, X=CH2CH2CH2CH2, x=128, y=64, z=512; Or R=CH3, m=4, X=CH2CH(CH3)CH2, x=128, y=64, z=512; Or R=CH3, m=4, X=CH(CH3)CH2CH2, x=128, y=64, z=512; Or R=CH3, m=4, X=C(CH3)2CH2, x=128, y=64, z=512.

[0017] Preferably, the enzyme preparation comprises one or more of protease, cellulase, lipase, amylase and mannanase.

[0018] Preferably, the whitening agent includes one or more of a distyryl biphenyl type fluorescent whitening agent and a bistriazine amino distyryl type fluorescent whitening agent.

[0019] Preferably, the apparent specific gravity of the sodium sulphate is 1.0-1.5 g / ml, and the particle size is 0.05-0.4 mm. The apparent specific gravity of the sodium sulphate of this specification is moderate, and the particle size is close to that of white carbon black, so the mixing is more uniform and more suitable for granulation.

[0020] Preferably, the white carbon black is precipitated silica, with an oil absorption value of ≥≥20ml / 10g and a particle size of 0.05-0.25mm. This specification of white carbon black has strong adsorption capacity, a particle size close to that of glauber powder, more uniform mixing, and is more suitable for granulation.

[0021] In the second aspect, the present invention provides a method for preparing the above-mentioned soft stain-removing particles, comprising the following steps: using a wet granulator to first stir and granulate the modified silicone oil with sodium sulfate and 50-75% of white carbon black, then add enzyme preparations and whitening agents, add the remaining amount of white carbon black after stirring, and mix evenly.

[0022] In the above preparation method, the present invention first mixes the wet material (modified silicone oil) with sodium sulfate and white carbon black for granulation, which can ensure that sodium sulfate and white carbon black fully absorb and penetrate the wet material, so that the material body remains relatively dry. Then, small materials such as enzyme preparations and whitening agents are added to avoid contact with the wet material. Finally, 1 / 4 to 1 / 2 of the amount of white carbon black is added to wrap the silicone oil and small materials that have penetrated into the surface of the material body, so as to achieve uniform granulation and good fluidity of the entire material body.

[0023] In a third aspect, the present invention provides the use of the above-mentioned soft stain removal particles in a stubborn stain removal washing powder, wherein the stubborn stain removal washing powder contains sodium percarbonate.

[0024] The modified silicone oil of the present invention is mixed with an enzyme preparation and a whitening agent to form soft stain removal particles, which can be stably present in a stubborn stain removal washing powder containing sodium percarbonate. At the same time, the active oxygen in the formula will not be consumed in advance, the stability is good, the stain removal effect is stronger than that of ordinary oxygen bleaching powder, and more types of stains can be removed, and the spectrum is wider.

[0025] Preferably, the mass content of sodium percarbonate in the stubborn stain removing laundry detergent is 20-60%, and the mass content of the softening stain removing particles is 2-10%.

[0026] In a fourth aspect, the present invention provides a stubborn stain removing laundry detergent with softening effect, comprising the following raw materials in mass percentage: 2-10% of the above-mentioned softening stain removing particles, 20-60% of sodium percarbonate, 0-6% of a bleach activator (further preferably 1-6%), 0-50% of an alkaline auxiliary agent (further preferably 10-50%), 0-5% of a chelating agent, 0.5-10% of a surfactant and sodium sulfate.

[0027] Preferably, the bleach activator comprises one or more of tetraacetylethylenediamine and sodium nonanoyloxybenzenesulfonate.

[0028] Preferably, the alkaline auxiliary agent includes one or more of sodium carbonate, sodium bicarbonate, orthosilicate and metasilicate.

[0029] Preferably, the chelating agent includes one or more of sodium ethylenediaminetetraacetate, sodium citrate, sodium glutamate diacetate, and hydroxyethylidene diphosphonic acid.

[0030] Preferably, the surfactant includes one or more of anionic surfactants and nonionic surfactants.

[0031] Further preferably, the anionic surfactant is a solid particle selected from one or more of linear alkylbenzene sulfonate, fatty acid methyl ester sulfonate, fatty alcohol polyoxyethylene ether sulfate, fatty alcohol polyoxyethylene ether carboxylate, sodium α-olefin sulfonate, sodium lauryl sulfate and fatty acid sodium soap.

[0032] More preferably, the nonionic surfactant is selected from one or more of alkyl glycosides, fatty alcohol polyoxyethylene ethers, and isomeric alcohol polyoxyethylene ethers.

[0033] In a fifth aspect, the present invention provides a method for preparing the above-mentioned stubborn stain removing laundry detergent, comprising the following steps: using a zero-gravity mixer, firstly mixing the softening stain removing particles, bleach activator, alkaline auxiliary agent, sodium sulfate and anionic surfactant, then adding a non-ionic surfactant by atomization, and finally adding sodium percarbonate, mixing evenly and then discharging and packaging.

[0034] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention provides a modified silicone oil with a novel ternary copolymer structure, which is connected to an alkyl bridging group through a polymerization section, and the molecular structure and molecular weight of the bridging part are controlled at the same time, so that the structure between the silicon atom and the amino group is more balanced, thereby making the amino group more firmly bonded. In addition, its unique ternary copolymer structure ensures the high molecular weight of the modified silicone oil. The higher the molecular weight, the greater the viscosity, the better the film-forming property of the modified silicone oil on the surface of the fabric, the softer the hand feel, and the better the elasticity. Amino groups are further introduced into the structure of the modified silicone oil, which has a stronger polarity and can interact with the hydroxyl and carboxyl groups on the fiber surface, and can be oriented and adsorbed on the fiber very firmly. In addition, the Si-O bond main chain and the methyl group on the silicon atom play a physical isolation role, which reduces the static friction coefficient between the fibers and gives the fabric a soft effect. In addition, after the modified silicone oil is adsorbed on the fiber, the carbonic acid formed by the carbon dioxide and moisture in the air cross-links with the amino group, forming an elastic network structure with a high degree of polymerization on the surface and inside of the fiber, thereby giving the fabric a super soft effect and excellent washing resistance. Therefore, compared with ordinary silicone oil, it has better fabric softening effect and is more stable in the detergent system for tough stains.

[0035] (2) To further improve the effects of the modified silicone oil, enzyme preparation and brightener of the present invention under long-term conditions in a stubborn stain removal detergent containing sodium percarbonate. The present invention further encapsulates and granulates the modified silicone oil, enzyme preparation and brightener into soft stain removal particles, and adds the particles to the stubborn stain removal detergent formula to avoid direct contact between them and active oxygen, alkaline substances, etc., thereby maintaining the stability of each raw material, and after adding various enzyme preparations, the stain removal range is wider. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the embodiments.

[0037] Overall embodiment In the first aspect, a soft stain removal particle comprises the following raw materials in percentage by mass: 5-20% modified silicone oil, 0-10% enzyme preparation, 0-2.5% brightener (preferably 0.5-2.5%), 40-85% sodium sulfate, and 5-30% white carbon black.

[0038] Among them, sodium sulphate and white carbon black are wrapped on the surface of a mixture of modified silicone oil, enzyme preparation and whitening agent.

[0039] The structural formula of modified silicone oil is as follows: Wherein, x, y, z are positive integers, and R is -OH or -CH3, X=C m H 2m , m is 1-4. wherein x is preferably 100-150, y is preferably 50-70, and z is preferably 450-550.

[0040] In some more preferred implementation cases, the parameters in the modified silicone oil are as follows: R=OH, m=1, X=CH2, x=134, y=67, z=536; Or R=OH, m=2, X=CH2CH2, x=132, y=66, z=528; Or R=OH, m=3, X=CH2CH2CH2, x=128, y=64, z=512; Or R=OH, m=3, X=CH(CH3)CH2, x=128, y=64, z=512; Or R=OH, m=4, X=CH2CH2CH2CH2, x=126, y=63, z=504; Or R=OH, m=4, X=CH2CH(CH3)CH2, x=126, y=63, z=504; Or R=OH, m=4, X=CH(CH3)CH2CH2, x=126, y=63, z=504; Or R=OH, m=4, X=C(CH3)2CH2, x=126, y=63, z=504; Or R=CH3, m=1, X=CH2, x=134, y=67, z=536; Or R=CH3, m=2, X=CH2CH2, x=132, y=66, z=528; Or R=CH3, m=3, X=CH2CH2CH2, x=130, y=65, z=520; Or R=CH3, m=3, X=CH(CH3)CH2, x=130, y=65, z=520; Or R=CH3, m=4, X=CH2CH2CH2CH2, x=128, y=64, z=512; Or R=CH3, m=4, X=CH2CH(CH3)CH2, x=128, y=64, z=512; Or R=CH3, m=4, X=CH(CH3)CH2CH2, x=128, y=64, z=512; Or R=CH3, m=4, X=C(CH3)2CH2, x=128, y=64, z=512.

[0041] In some preferred implementation cases, the enzyme preparation includes one or more of protease, cellulase, lipase, amylase, and mannanase.

[0042] In some preferred implementation cases, the whitening agent includes one or more of a distyryl biphenyl type fluorescent whitening agent and a bistriazine amino distyryl type fluorescent whitening agent.

[0043] In some preferred implementation cases, the apparent specific gravity of the sodium sulphate is 1.0-1.5 g / ml, and the particle size is 0.05-0.4 mm.

[0044] In some preferred implementation cases, the white carbon black is precipitated silica with an oil absorption value of ≥≥20 ml / 10 g and a particle size of 0.05 to 0.25 mm.

[0045] In the second aspect, a method for preparing the above-mentioned soft stain-removing particles specifically includes the following steps: using a wet granulator, the modified silicone oil is first mixed with sodium sulfate and 50-75% of white carbon to granulate, and then an enzyme preparation and a whitening agent are added. After stirring, the remaining amount of white carbon is added and mixed evenly.

[0046] In a third aspect, the present invention provides the use of the above-mentioned soft stain removal particles in a stubborn stain removal washing powder, wherein the stubborn stain removal washing powder contains sodium percarbonate.

[0047] In some preferred implementation cases, the mass content of sodium percarbonate in the stubborn stain removing laundry detergent is 20-60%, and the mass content of the softening stain removing particles is 2-10%.

[0048] In a fourth aspect, a laundry detergent with softening effect and stubborn stain removal comprises the following raw materials in percentage by mass: 2-10% of the above-mentioned softening and stain removal particles, 20-60% of sodium percarbonate, 0-6% of a bleach activator (further preferably 1-6%), 0-50% of an alkaline auxiliary agent (further preferably 10-50%), 0-5% of a chelating agent, 0.5-10% of a surfactant and sodium sulfate.

[0049] In some preferred implementation cases, the bleach activator includes one or more of tetraacetylethylenediamine and sodium nonanoyloxybenzenesulfonate.

[0050] In some preferred implementation cases, the alkaline auxiliary agent includes one or more of sodium carbonate, sodium bicarbonate, orthosilicate, and metasilicate.

[0051] In some preferred implementation cases, the chelating agent includes one or more of sodium ethylenediaminetetraacetate, sodium citrate, sodium glutamate diacetate, and hydroxyethylidene diphosphonic acid.

[0052] In some preferred implementation cases, the surfactant includes one or more of anionic surfactants and nonionic surfactants. In some more preferred implementation cases, the anionic surfactant is a solid particle selected from one or more of linear alkylbenzene sulfonate, fatty acid methyl ester sulfonate, fatty alcohol polyoxyethylene ether sulfate, fatty alcohol polyoxyethylene ether carboxylate, sodium α-olefin sulfonate, sodium lauryl sulfate and fatty acid sodium soap. In some more preferred implementation cases, the nonionic surfactant is selected from one or more of alkyl glycosides, fatty alcohol polyoxyethylene ethers, and isomeric alcohol polyoxyethylene ethers.

[0053] In a fifth aspect, a method for preparing the above-mentioned stubborn stain removing laundry detergent comprises the following steps: using a zero-gravity mixer, firstly, the softening stain removing particles, bleaching activator, alkaline auxiliary agent, sodium sulfate and anionic surfactant are stirred evenly, then atomized and non-ionic surfactant is added, and finally, sodium percarbonate is added, stirred evenly and then the material is discharged and packaged.

[0054] Preparation example of soft stain removal particles Table 1: Formula of Softening Stain Remover Particles The preparation method of each soft stain removal particle in Table 1 is as follows: a wet granulator is used to prepare the modified silicone oil, sodium sulfate and 2 / 3 amount of white carbon black, and then enzyme preparations and brighteners are added. After proper stirring, 1 / 3 amount of white carbon black is finally added and mixed evenly.

[0055] The structural formula of the above modified silicone oil 8 is shown below, wherein R=OH, X=C(CH3)2CH2, x=126, y=63, z=504.

[0056] The fluorescent whitening agent (CBS-X) is of 4,4'-bis(diphenylethylene) biphenyl type, the white carbon black is precipitated silica with a particle size of 0.05-0.25 mm, and the particle size of glauber powder is 0.05-0.4 mm.

[0057] The angle of repose is measured according to GB 11986 "Measurement of the angle of repose of surfactant powders and particles". The smaller the angle of repose, the better the fluidity. The fluidity of powders with an angle of repose of less than 45° basically meets the requirements, and the fluidity is poor above 45°. From the data comparison in Table 1, it can be seen that the fluidity of the soft stain removal particle 5 is poor and does not meet the requirements, while the others meet the requirements. The reason is that the content of modified silicone oil in the soft stain removal particle 5 is too high.

[0058] Further, based on the formula of soft stain removal particles 3, 15 other improved silicone oils were prepared and tested respectively. The structural formula of the modified silicone oil is as above, and the specific parameters are as follows: Modified silicone oil 1: R = OH, m = 1, X = CH2, x = 134, y = 67, z = 536; Modified silicone oil 2: R = OH, m = 2, X = CH2CH2, x = 132, y = 66, z = 528; Modified silicone oil 3: R = OH, m = 3, X = CH2CH2CH2, x = 128, y = 64, z = 512; Modified silicone oil 4: R = OH, m = 3, X = CH (CH3) CH2, x = 128, y = 64, z = 512; Modified silicone oil 5: R = OH, m = 4, X = CH2CH2CH2CH2, x = 126, y = 63, z = 504; Modified silicone oil 6: R = OH, m = 4, X = CH2CH(CH3)CH2, x = 126, y = 63, z = 504; Modified silicone oil 7: R = OH, m = 4, X = CH (CH3) CH2CH2, x = 126, y = 63, z = 504; Modified silicone oil 9: R = CH3, m = 1, X = CH2, x = 134, y = 67, z = 536; Modified silicone oil 10: R = CH3, m = 2, X = CH2CH2, x = 132, y = 66, z = 528; Modified silicone oil 11: R = CH3, m = 3, X = CH2CH2CH2, x = 130, y = 65, z = 520; Modified silicone oil 12: R = CH3, m = 3, X = CH(CH3)CH2, x = 130, y = 65, z = 520; Modified silicone oil 13: R = CH3, m = 4, X = CH2CH2CH2CH2, x = 128, y = 64, z = 512; Modified silicone oil 14: R = CH3, m = 4, X = CH2CH(CH3)CH2, x = 128, y = 64, z = 512; Modified silicone oil 15: R = CH3, m = 4, X = CH(CH3)CH2CH2, x = 128, y = 64, z = 512; Modified silicone oil 16: R=CH3, m=4, X=C(CH3)2CH2, x=128, y=64, z=512.

[0059] The formula of the soft stain removal particles is as follows: Table 2, Table 3, Table 4: Table 2: Formula of Softening Stain Remover Particles Table 3: Formula of Softening Stain Remover Particles Table 4: Formula of Softening Stain Remover Particles It can be seen that different modified silicone oils have little effect on granulation, the angles of repose are basically the same, the particle fluidity is good, and the pH is also close.

[0060] Examples 1-8 Table 5: Formula of detergent powder with softening function Examples 9-12 Table 6: Formula of detergent powder with softening function The preparation method of the stubborn stain removing laundry detergent with softening function in Table 5 and Table 6 is as follows: Prepared by using a weightless mixer. First, add softening stain removing particles, TAED, soda ash, sodium metasilicate, sodium citrate, powdered sodium sulfonate (80%), and sodium sulfate and stir evenly, then add AEO-9 by atomization, and finally add sodium percarbonate and stir evenly.

[0061] Comparative Examples 1-3 Table 7: Formula of Comparative Examples 1-3 for Stubborn Stain Removal Laundry Powder Note: (a) The content of organic silicon in Comparative Examples 1-3 is the same as that of modified silicone oil in Examples 4, 8 and 12, respectively; (b) The content of enzyme preparation and brightener in Comparative Examples 1-3 is the same as that in Examples 10, 11 and 12, respectively; The preparation method of the stubborn stain removing laundry detergent with softening function in Table 7 is as follows: It is prepared by a weightless mixer. First, add protease, amylase, cellulase, brightener, TAED, soda ash, sodium metasilicate, sodium citrate, powdered sodium sulfonate, and sodium sulfate and stir evenly, then add AEO-9 and silicone by atomization, and finally add sodium percarbonate and stir evenly.

[0062] Performance Testing The samples of the above embodiments and comparative examples were compared in terms of softness, stain removal and stability. The specific test methods and results are as follows: (1) Evaluation method: Softness performance: Washing in a drum washing machine, 20g of the example washing powder, 10L of water, 5 pure cotton towels, bath ratio 1:20; washing for 10 minutes, rinsing twice, 5 minutes each time, dehydration for 5 minutes, and natural drying. Then select 9 people with sensitive hand skin to touch the towel and rate the softness, 1 point is very hard, 10 points is very soft. Stain removal performance: Tested using GB 13174 standard method.

[0063] Stability: The samples were placed in a constant temperature and humidity chamber at 45°C and 70% humidity for 1 month.

[0064] (2) Evaluation results: (2.1) The softness and stability of the samples of Examples 1 to 12 and Comparative Examples 1 to 3 are compared as shown in Table 8: Table 8: Softening effect and stability of examples and comparative examples From the data in the above table, we can see that: ① The higher the content of modified silicone oil in Examples 1-12, the better the compliance performance and stability of the samples. After the stability test, the compliance performance and active oxygen decomposition rate remained basically unchanged. The content of modified silicone oil in Example 1 was relatively low, the compliance score was less than 5 points, and the effect was significantly reduced. The other examples performed well. ② Compared with Examples 1-12, the compliance effect and stability of Comparative Examples 1-3 were poor, and the higher the amount of silicone oil added, the more obvious the changes in powder color and odor, and the faster the active oxygen decomposition.

[0065] (2.2) The comparison of the decontamination performance and stability of the samples of Examples 1 to 12 and Comparative Examples 1 to 3 is shown in Table 9: Table 9: Decontamination effect and stability of examples and comparative examples (data are decontamination P values) From the data in the above table, we can see that: ① The more enzyme preparations, whitening agents, etc. are added to the samples of Examples 1-12, the higher the detergency. The stability is good, and the detergency remains basically unchanged after the stability test; ② The samples of Comparative Examples 1-3 have poor detergency and stability compared with Examples 1-12. The detergency is significantly reduced after the stability test, and the detergency value is even lower.

[0066] 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.

[0067] 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 soft stain removal particle, characterized in that The following raw materials are included in the following mass percentages: Modified silicone oil 5-20%, Enzyme preparation 0-10%, Brightener 0~2.5%, Sodium sulfate 40~85%, White carbon black 5-30%; Among them, sodium sulfate and white carbon black are coated on the surface of a mixture of modified silicone oil, enzyme preparation and whitening agent; The structural formula of modified silicone oil is as follows: Where x, y, z are positive integers, and R is -OH or -CH3, X=C m H 2m , m is 1-4.

2. The soft stain removal particle according to claim 1, characterized in that: In modified silicone oil: x is 100-150, y is 50-70, and z is 450-550.

3. The soft stain removal particle according to claim 1, characterized in that: The enzyme preparation includes one or more of protease, cellulase, lipase, amylase and mannanase; The whitening agent includes one or more of a distyryl biphenyl type fluorescent whitening agent and a bistriazine amino distyryl type fluorescent whitening agent; The apparent specific gravity of the glauber's salt is 1.0-1.5 g / ml, and the particle size is 0.05-0.4 mm; The white carbon black is precipitated silica, with an oil absorption value of ≥≥20 ml / 10 g and a particle size of 0.05 to 0.25 mm.

4. A method for preparing the soft stain removal particles according to any one of claims 1 to 3, characterized in that include: The modified silicone oil is first mixed with sodium sulfate and 50-75% of white carbon black to form granules, and then enzyme preparation and brightener are added. After mixing, the remaining amount of white carbon black is added and mixed evenly.

5. Use of the soft stain removal particles according to any one of claims 1 to 3 or the soft stain removal particles obtained by the preparation method according to claim 4 in stubborn stain removal washing powder, characterized in that: The stubborn stain removing washing powder contains sodium percarbonate.

6. The use according to claim 5, characterized in that: The mass content of sodium percarbonate in the stubborn stain removing washing powder is 20-60%, and the mass content of the softening stain removing particles is 2-10%.

7. A detergent powder with softening effect for removing stubborn stains, characterized in that The following raw materials are included in the following mass percentages: 2-10% of the softening stain removal particles according to any one of claims 1 to 3, Sodium percarbonate 20-60%, Bleach activator 0~6%, Alkaline additive 0~50%, Chelating agent 0-5%, Surfactant 0.5~10%, The remaining amount of sodium sulphate.

8. The stubborn stain removing washing powder according to claim 7, characterized in that: The bleach activator includes one or more of tetraacetylethylenediamine and sodium nonanoyloxybenzenesulfonate; The alkaline auxiliary agent includes one or more of sodium carbonate, sodium bicarbonate, orthosilicate, and metasilicate; The chelating agent includes one or more of sodium ethylenediaminetetraacetate, sodium citrate, sodium glutamate diacetate, and hydroxyethylidene diphosphonic acid; The surfactant includes one or more of anionic surfactants and nonionic surfactants.

9. The stubborn stain removing washing powder according to claim 8, characterized in that: The anionic surfactant is a solid particle selected from one or more of linear alkylbenzene sulfonate, fatty acid methyl ester sulfonate, fatty alcohol polyoxyethylene ether sulfate, fatty alcohol polyoxyethylene ether carboxylate, sodium α-olefin sulfonate, sodium lauryl sulfate and fatty acid sodium soap; and / or The nonionic surfactant is selected from one or more of alkyl glycosides, fatty alcohol polyoxyethylene ethers, and isomeric alcohol polyoxyethylene ethers.

10. A method for preparing the stubborn stain removing washing powder according to claim 9, characterized in that include: First, mix the softening stain removal particles, bleach activator, alkaline additive, chelating agent, sodium sulfate and anionic surfactant evenly, then add non-ionic surfactant by atomization, and finally add sodium percarbonate, mix evenly and then discharge and package.

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