Liquid composition having antioxidant efficacy and use thereof, laundry detergent

Abstract

The application discloses a liquid composition with antioxidant efficacy and application thereof, and laundry detergent, which comprises an antioxidant, an antioxidant aid and an alkaline neutralizing agent; wherein the antioxidant comprises at least one of peony root bark extract, peony flower water extract and peony seed oil, and the antioxidant aid comprises high-purity oleic acid and a metal chelating agent. The high-purity oleic acid and the metal chelating agent can synergistically act with the antioxidant paeonol, so that the paeonol can have good antioxidant efficacy when the amount of the paeonol in the laundry detergent is less than 0.5%. The oleic acid contains an unsaturated double bond, and is easy to be oxidized by oxygen in the air. The metal chelating agent can form a complex with trace metal ions promoting the oxidation reaction, so that the metal ions lose the promoting effect on the oxidation, and hydrogen is provided for antioxidant free radical groups (A·) generated in the free radical chain reaction, so that the antioxidant is regenerated and has the antioxidant capacity again.

Description

Technical Field

[0001] This invention belongs to the field of detergents, and relates to liquid compositions, particularly to a liquid composition with antioxidant properties and its application in laundry detergents, as well as laundry detergents containing the liquid composition. Background Technology

[0002] Oxidation is the process by which a substance loses electrons; in a narrow sense, oxidizing property refers to the combination of a substance with oxygen. In the detergent industry, during fabric cleaning, natural or synthetic fabric fibers undergo repeated washing and sun exposure. The dye matrix on the fabric fibers reacts with oxygen in the air or oxidizing agents in the detergent, causing changes in the dye matrix structure, leading to discoloration, fading, and loss of original luster. Furthermore, natural fabric fibers (such as cotton, linen, and animal fibers like wool and silk) also slowly oxidize with oxygen in the air during sun exposure and daily wear. This causes the molecular structure of the fibers to break or break down, resulting in aging, hardening, or brittleness. Antioxidant properties, short for free radical scavenging, effectively inhibit further oxidation reactions between dye molecules and textile fabrics, thus protecting the fabric's color and structure from oxidation.

[0003] Antioxidants are widely used in the food and skincare / cosmetics industries. In the food industry, antioxidants can prevent or delay food spoilage caused by oxidation, improve food stability, and extend shelf life. Commonly used food antioxidants include oil-soluble and water-soluble antioxidants. Oil-soluble antioxidants include ascorbic acid and its salts, sulfur dioxide and its salts, etc. Water-soluble antioxidants include butylated hydroxyanisole, dibutylated hydroxyanisole, gallic acid, vitamin E, etc. According to their source, they can be divided into natural antioxidants and synthetic antioxidants.

[0004] In the field of skincare and cosmetics, antioxidants can effectively inhibit the free radicals produced by human cells, thus delaying aging. Commonly used antioxidants in cosmetics include vitamin C and vitamin E and their derivatives.

[0005] However, in the detergent industry, the number of usable antioxidants in fabric cleaners is limited, mainly due to two factors: 1) Common laundry detergents are water-based, and the washing environment is also water-based. Oil-soluble antioxidants have poor solubility in laundry detergents and cannot play a good role; 2) Commonly used antioxidants have reducing properties, which can affect the activity of Kathon preservatives and protease preparations in laundry detergents. The addition of antioxidants can lead to a decrease in the detergent's detergency and affect the stability of its shelf life. Due to these insurmountable technical barriers, laundry detergents with antioxidant effects are not available on the market, and no related patents have been found. Summary of the Invention

[0006] To address the aforementioned problems, the present invention first provides a liquid composition with antioxidant properties, comprising an antioxidant, an antioxidant auxiliary agent, and an alkaline neutralizer.

[0007] Secondly, the present invention provides a laundry detergent comprising the liquid composition having antioxidant properties.

[0008] Finally, the present invention provides the application of this liquid composition with antioxidant properties in laundry detergents.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] The present invention first provides a liquid composition with antioxidant effects, wherein the liquid composition with antioxidant effects includes an antioxidant, an antioxidant auxiliary agent and an alkaline neutralizer; wherein the antioxidant includes at least one of peony root bark extract, peony flower water extract and peony seed oil, and the antioxidant auxiliary agent includes high-purity oleic acid and a metal chelating agent.

[0011] As a preferred embodiment of the present invention, the metal chelating agent includes at least one of tetrasodium diacetate of glutamate, disodium ethylenediaminetetraacetate, tetrasodium ethylenediaminetetraacetate, calcium citrate, and calcium gluconate.

[0012] As a preferred embodiment of the present invention, the alkaline neutralizing agent includes at least one of liquid alkali, potassium hydroxide, and monoethanolamine.

[0013] As a preferred embodiment of the present invention, the method for preparing the antioxidant is as follows: 1) Take raw materials: peony root bark or peony flower or peony seed, use water as solvent, and extract by warm soaking or reflux to obtain an extract;

[0014] 2) The obtained extract is further concentrated and purified by depressurization, concentration, evaporation and further concentration.

[0015] The present invention also provides a laundry detergent comprising the above-described liquid composition having antioxidant properties.

[0016] In a preferred embodiment of the present invention, the antioxidant accounts for 0.1% to 5.0% of the mass of the laundry detergent.

[0017] In a preferred embodiment of the present invention, the high-purity oleic acid in the antioxidant additive accounts for 0.5% to 1.0% of the mass of the laundry detergent.

[0018] In a preferred embodiment of the present invention, the metal chelating agent in the antioxidant additive accounts for 0.2% to 1.0% of the mass of the detergent.

[0019] As a preferred embodiment of the present invention, the pH of the laundry detergent is 7-9.

[0020] Finally, this invention provides the application of the above-described liquid composition with antioxidant properties in laundry detergents.

[0021] Through repeated research on the mechanism of oxidation, the team of this invention discovered that to exert excellent antioxidant function in laundry detergent, it is necessary to have both antioxidants and antioxidant auxiliaries. Furthermore, the reducing power of the selected antioxidant components should not be too strong, otherwise it will affect the activity of components such as Kathon preservative and alkaline protease in the detergent.

[0022] Through repeated experiments and research, the team of this invention discovered that the preparation methods of peony root bark extract, peony flower water extract, and peony seed oil extract include the following steps: 1) Take raw materials: peony root bark (or peony flower or peony seed), use water as solvent, and extract by warm soaking or reflux to obtain an extract; 2) Further concentrate and purify the obtained extract by steps such as depressurization, concentration, and volatilization.

[0023] The active ingredient in peony root bark extract (or peony flower water extract or peony seed oil) is paeonol, with the molecular structural formula C9H. 10 O3, chemically named 2-hydroxy-4-methoxyacetophenone, contains paeonol, which possesses antioxidant, free radical scavenging, antibacterial, and anti-inflammatory properties. When applied to laundry detergents, this extract exhibits good antioxidant performance without affecting the activity of preservatives such as Kathon and alkaline protease. However, its application is limited. Paeonol is insoluble in cold water. Laundry detergents contain surfactants, which have a solubilizing effect. While small amounts of paeonol can dissolve in laundry detergents, concentrations exceeding 0.5% degrade detergent stability. Insufficient paeonol concentration in laundry detergents results in poor antioxidant activity, and paeonol is unstable in detergents, easily reacting with oxygen in the air or other detergent components during storage, thus losing its antioxidant properties.

[0024] Compared with the prior art, the present invention has the following beneficial effects.

[0025] 1) This invention, by adding the antioxidant auxiliaries high-purity oleic acid and metal chelating agents, can achieve a synergistic effect with the antioxidant paeonol, ensuring that paeonol exerts good antioxidant efficacy even when its dosage in laundry detergent is <0.5%. The underlying principle for this synergistic antioxidant effect is speculated to be: the molecular structure of oleic acid is C... 17 H 34COOH, chemically known as cis-9-octadecenoic acid, contains an unsaturated double bond and is easily oxidized by oxygen in the air. The metal chelating agent tetrasodium glutamate diacetate can form complexes with trace amounts of metal ions that promote oxidation, thus neutralizing the oxidizing effect of the metal ions. Furthermore, the antioxidant free radical groups (A·) generated in the free radical chain reaction provide hydrogen, allowing the antioxidant to regenerate and regain its antioxidant capacity. Detailed Implementation

[0026] To facilitate understanding of the technical means, creative features, objectives, and effects of this invention, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the scope of protection of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0027] In the following embodiments, the following abbreviations will be used and the functions indicated therein will be used.

[0028] Coconut oil fatty acid salts: Sodium salts of coconut oil fatty acids are obtained by reacting coconut oil with liquid alkali;

[0029] High-purity oleate: It is obtained by reacting oleic acid (mass percentage ≥70%) with liquid alkali, and the alkyl group has C12 to C18 carbon atoms.

[0030] LAS salt: The sodium salt of LAS, obtained by reacting LAS with liquid alkali.

[0031] AES: Sodium fatty alcohol polyoxyethylene ether sulfate, where the carbon chain length of the fatty alcohol is 12-14 and the average number of EOs is 2.

[0032] AOS: sodium α-olefin sulfonate, with a carbon chain length of 12-16.

[0033] AEO-9: Fatty alcohol polyoxyethylene ether, the carbon chain length of the fatty alcohol is 12-14, and the average number of EOs is 9.

[0034] AEO-7: Fatty alcohol polyoxyethylene ether, the carbon chain length of the fatty alcohol is 12-14, and the average number of EOs is 7.

[0035] APG: Alkyl glycosides, fatty alcohols with a carbon chain length of 8-14.

[0036] Kathon: A mixture of methylchloroisothiazolinone and methylisothiazolinone

[0037] Alkaline protease: Liquid alkaline protease

[0038] General Implementation Examples

[0039] Implement the dosage according to the formula in Table 1, weigh each component, prepare the composition according to the preparation method, and adjust the pH value of the laundry detergent to 7-9. pH and appearance are evaluated according to the appearance test method in "QB / T 1224 Liquid Detergents for Clothing". Specifically: if there is no significant change in appearance after maintaining at (40±2)℃ for 24 hours and then returning to room temperature, it is recorded as "compliant with the standard"; otherwise, it is recorded as "non-compliant with the standard". If there is no significant change in appearance after maintaining at (-5±2)℃ for 24 hours and then returning to room temperature, it is recorded as "compliant with the standard"; otherwise, it is recorded as "non-compliant with the standard". At room temperature, if it is a homogeneous, transparent liquid, without layering, and without obvious suspended matter or sediment, it is recorded as "compliant with the standard"; otherwise, it is recorded as "non-compliant with the standard".

[0040] Antioxidant performance test: The iodine bleaching method was used. Take 100mL of deionized water, add 15 drops of iodine bleaching, shake well. At this time, the solution turns purple-red. Add 5g of laundry detergent, stir well to disperse and dissolve, let stand, and record the time required for the iodine bleaching to completely fade. When the bleaching time is >10min, it is recorded as "not having antioxidant properties". When the bleaching time is <10min, it is recorded as "having antioxidant properties".

[0041] Fabric color testing: Referencing the test method for cyclic washing in GB / T 13174 "Test of Stain Removal Power and Cyclic Washing Performance of Detergents for Clothing," the test concentration was 2 g / L, the test temperature was 30℃, the test time was 20 min, the testing instrument was a vertical stain remover, and the number of cyclic washes was 10. The experimental fabrics were 6cm × 6cm: red, yellow, and blue cotton fabrics; and red, yellow, and blue Tencel fabrics. The color change grade of the experimental fabrics was assessed using a standard gray scale. A grade less than 5 was recorded as "having a protective effect on the fabric color," and a grade greater than 5 was recorded as "having no protective effect on the fabric color."

[0042] Table 1. Formulation Table of Examples

[0043]

[0044]

[0045] The performance of the laundry detergent obtained in the above embodiments was tested, and the test results are summarized in Table 2. Table 2 shows that when the pH is 7-9, the mass percentage of the antioxidant is 0.1-0.5%, the mass percentage of the antioxidant auxiliary high-purity oleic acid is 0.5%-1.0%, and the mass percentage of the antioxidant auxiliary metal chelating agent tetrasodium glutamate diacetate is 0.2%-1.0%. A laundry detergent with good appearance and stability can be obtained. This laundry detergent has antioxidant effects and protects the color of cotton and Tencel fabrics.

[0046] Table 2. Performance test results of the examples

[0047]

[0048] To further verify the applicability of the embodiments, three sets of comparative examples were made for Examples 1, 2 and 3, namely Comparative Example 1, Comparative Example 2 and Comparative Example 3. In Comparative Example 1, oleic acid was replaced with coconut oil acid; in Comparative Example 2, the amount of tetrasodium glutamate diacetate metal chelating agent in Example 2 was changed to 0; and in Comparative Example 3, the amount of antioxidant in Example 3 was adjusted to 0. See Table 3 for details.

[0049] Table 3. Comparative Formula Table

[0050]

[0051] The antioxidant properties of the laundry detergents obtained in the above control examples were tested, and the test results are summarized in Table 4. As can be seen from Table 4, the laundry detergents obtained by removing the antioxidants (peony root bark extract, peony flower water extract, peony seed oil), or the antioxidant auxiliary high-purity oleic acid, or the metal chelating agent tetrasodium glutamate diacetate, do not have antioxidant effects.

[0052] Table 4. Performance test results of the control example

[0053]

[0054] To further verify the detergency of the embodiments, the detergency of the three laundry detergents in the above embodiments was tested and compared with that of the standard laundry detergent. The test results are shown in Table 5. As can be seen from Table 5, the detergency of the laundry detergents containing liquid compositions with antioxidant effects is better than that of the standard laundry detergent, which meets the requirements of QB / T 1224 standard.

[0055] Detergent cleaning power test method: Refer to GB / T 13174 Test of detergency and cyclic washing performance of detergents for clothing. The test concentration is 2g / L, the test temperature is 30℃, the test time is 20min, the test instrument is a vertical detergent remover, and the test soiled cloth (i) is JB01 (carbon black national standard soiled cloth), JB02 (protein national standard soiled cloth), and JB03 (leather national standard soiled cloth). The standard laundry detergent is prepared according to the method in GB / T 13174. Wherein: the detergency ratio Pi of the i-th soiled cloth relative to the standard detergent, when Pi>1.0, is recorded as "detergency cleaning power meets the requirements", otherwise it is recorded as "detergency cleaning power does not meet the requirements".

[0056] P i =R i / R O

[0057] In the formula: R i The stain removal value of the laundry detergent test sample on the i-th soiled fabric;

[0058] R o The stain removal value of the standard sample of laundry detergent on the i-th soiled fabric;

[0059] Table 5. Detergent performance test results of the examples

[0060] Decontamination performance Example 1 Example 2 Example 3 JB01 1.1 1.0 1.0 JB02 1.3 1.3 1.3 JB03 1.1 1.0 1.1

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from the method of the present invention, and these improvements and additions should also be considered within the scope of protection of the present invention. Any modifications, alterations, and equivalent changes made by those skilled in the art based on the above-disclosed technical content without departing from the spirit and scope of the present invention are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A liquid composition with antioxidant properties, characterized in that, The liquid composition with antioxidant effects includes an antioxidant, an antioxidant auxiliary agent, and an alkaline neutralizer; wherein the antioxidant includes at least one of peony root bark extract, peony flower water extract, and peony seed oil, and the antioxidant auxiliary agent includes high-purity oleic acid and a metal chelating agent, wherein the mass percentage of oleic acid in the high-purity oleic acid is ≥70%. The metal chelating agent includes at least one of tetrasodium glutamate diacetate, disodium ethylenediaminetetraacetate, tetrasodium ethylenediaminetetraacetate, calcium citrate, and calcium gluconate. The alkaline neutralizing agent includes at least one of liquid alkali, potassium hydroxide, and monoethanolamine; The method for preparing the antioxidant is as follows: 1) Take raw materials: peony root bark, peony flowers, or peony seeds, and extract them by warm soaking or reflux with water as solvent to obtain the extract; 2) The obtained extract is further concentrated and purified by depressurization, concentration, evaporation, and purification. The mass percentage of antioxidants in laundry detergent is 0.1%–5.0%. The mass percentage of high-purity oleic acid in antioxidant additives in laundry detergents is 0.5% to 1.0%. The mass percentage of metal chelating agents in antioxidant auxiliaries in laundry detergents is 0.2% to 1.0%. The pH of laundry detergent is 7-9.

2. A laundry detergent, characterized in that, Includes the liquid composition with antioxidant properties as described in claim 1.

3. The application of a liquid composition with antioxidant properties as described in claim 1, characterized in that, The application of the liquid composition with antioxidant properties in laundry detergents.

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