Bio-based hydrogen peroxide bleaching stabilizer, and preparation method therefor and use thereof

Abstract

A bio-based hydrogen peroxide bleaching stabilizer and a preparation method therefor. Raw materials for preparing the bio-based hydrogen peroxide bleaching stabilizer comprise an amino acid chelating agent, sodium gluconate, polyepoxysuccinic acid, a starch graft, a passivator, and water. The bio-based hydrogen peroxide bleaching stabilizer contains no silicon or phosphorus and is environmentally friendly, so that hydrogen peroxide has better stability, thereby effectively reducing the non-productive decomposition of the hydrogen peroxide.

Description

Bio-based oxygen bleaching stabilizer, preparation method and application thereof TECHNICAL FIELD

[0001] The present application belongs to the technical field of oxygen bleaching stabilizers, and particularly relates to a bio-based oxygen bleaching stabilizer, a preparation method and application thereof. BACKGROUND

[0002] As an excellent bleaching agent, hydrogen peroxide has the characteristics of high bleaching whiteness, good stability and low cost, and is widely used in fabric desizing and bleaching in the textile industry. However, heavy metal ions such as Fe 3+ and Cu 2+ can catalyze the decomposition of hydrogen peroxide during bleaching, causing fiber damage and even forming oxygen bleaching holes on the bleached fabric. In order to control the decomposition of hydrogen peroxide and obtain good bleaching effect, an additive is needed to make hydrogen peroxide effectively decompose, and this additive is an oxygen bleaching stabilizer, also known as a hydrogen peroxide stabilizer. According to its mechanism, it can be divided into adsorption type oxygen bleaching stabilizer and chelating type oxygen bleaching stabilizer.

[0003] The most typical adsorption type oxygen bleaching stabilizer is sodium silicate. CN104928906A discloses a textile oxygen bleaching stabilizer made from the following raw materials in parts by weight: barium sulfate 8-16 parts, hexamethylenetetramine 2-4 parts, polyurethane resin 3-6 parts, sodium silicate 2-4 parts, ethyl acetate 4-6 parts, magnesium persulfate 2-5 parts, polyoxyethylene octylphenyl alcohol 4-7 parts, barium 2-ethylhexanoate 6-11 parts, diglycidyl ether 4-8 parts, magnesium sulfate 1-3 parts, ethylenediaminetetraacetic acid sodium 5-7 parts, boric acid 3-6 parts, barium metal organic liquid 10-14 parts, lubricant 4-8 parts, and trihydroxymethyl propane 1-2 parts. The textile oxygen bleaching stabilizer provided by the technical solution has a good stabilizing effect on hydrogen peroxide. Although sodium silicate has a good stabilizing effect on hydrogen peroxide and is not expensive, it can react with Ca 2+ and Mg 2+ , and is easy to produce silicon scale on the fabric and equipment, which reduces the whiteness of the fabric and the efficiency of the equipment.

[0004] Chelated oxygen bleaching stabilizers mainly include phosphate and carboxylate. CN102199869A discloses an oxygen bleaching stabilizer and its application. The oxygen bleaching stabilizer is prepared from the following components in the following proportions by weight: 50-70% of organic phosphate, 20-30% of polycarboxylic acid dispersant, and 10-20% of polyether surfactant. The organic phosphate is any one of diethylene triamine penta sodium methylene phosphonate and ethylene diamine tetra sodium methylene phosphonate. The polycarboxylic acid dispersant is polyacrylic acid. The polyether surfactant is any one of isooctanol polyoxyethylene ether phosphate and fatty alcohol polyoxyethylene ether carboxylic acid sodium. The oxygen bleaching stabilizer provided by the technical solution can effectively inhibit the decomposition of invalid oxygen and increase the proportion of hydrogen peroxide involved in the reaction. Although phosphate stabilizers have good stability, they can cause eutrophication of water bodies and destroy the ecological balance of aquatic life. Carboxylate stabilizers such as diethylene triamine pentaacetic acid (DTPA) and ethylene diamine tetraacetic acid (EDTA) have high toxicity and poor biodegradability.

[0005] CN111560768A discloses a phosphorus-free and silicon-free oxygen bleaching stabilizer and a preparation method thereof. The phosphorus-free and silicon-free oxygen bleaching stabilizer comprises the following raw materials in the following proportions by weight: 3.0-9.0% of reducing sugar, 1.0-6.0% of alcohol amine, 0.5-3.0% of amino carboxylate, 1.0-4.0% of auxiliary agent, 20-78% of hydrogen peroxide, 1.0-4.0% of chelating agent, and 1.0-4.0% of stabilizer. The phosphorus-free and silicon-free oxygen bleaching stabilizer provided by the technical solution does not contain phosphorus and silicon substances that are harmful to the environment, and solves the problems of silicon scale and eutrophication of water bodies. However, the stability of the oxygen bleaching stabilizer to hydrogen peroxide and the application performance of the oxygen bleaching stabilizer still need to be further improved.

[0006] Therefore, there is a need to develop a silicon-free and phosphorus-free biological-based oxygen bleaching stabilizer that is pollution-free to the environment, has good stabilizing effect on hydrogen peroxide, and has good application performance.

[0007] SUMMARY

[0008] The present application provides a biological-based oxygen bleaching stabilizer, a preparation method and application thereof. The preparation raw materials of the biological-based oxygen bleaching stabilizer are natural and biodegradable, and the biological-based oxygen bleaching stabilizer is pollution-free to the environment, silicon-free and phosphorus-free. When the biological-based oxygen bleaching stabilizer is applied in the pretreatment and oxygen bleaching process of fabrics, the fabrics have higher whiteness and less strength damage.

[0009] In a first aspect, the present application provides a biological-based oxygen bleaching stabilizer. The preparation raw materials of the biological-based oxygen bleaching stabilizer include amino acid chelating agent, sodium gluconate, polyepoxysuccinic acid, starch graft, passivation agent, and water.

[0010] In the present application, the preparation raw materials of the bio-based oxygen bleaching stabilizer include amino acid chelating agent, sodium gluconate, polyepoxysuccinic acid, starch graft, passivator and water combination, the preparation raw materials are natural, degradable, no silicon and no phosphorus, no pollution to the environment, have the characteristics of high fabric bleaching whiteness and small damage in long continuous oxygen bleaching process, are suitable for wide application.

[0011] Preferably, the amino acid chelating agent includes tetrasodium glutamate diacetate.

[0012] Preferably, the starch graft includes starch graft polyacrylic acid.

[0013] Preferably, the passivator includes magnesium salt.

[0014] Preferably, the magnesium salt includes magnesium sulfate and / or magnesium chloride.

[0015] Preferably, the preparation raw materials of the bio-based oxygen bleaching stabilizer include the following components by mass percentage: amino acid chelating agent 10% to 20% (for example, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18% or 19% and the like), sodium gluconate 5% to 10% (for example, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9% or 9.5% and the like), polyepoxysuccinic acid 3% to 10% (for example, 4%, 5%, 6%, 7%, 8% or 9% and the like), starch graft 5% to 15% (for example, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13% or 14% and the like), passivator 5% to 20% (for example, 7%, 9%, 11%, 13%, 15%, 17% or 19% and the like) and water 25% to 72% (for example, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65% or 70% and the like).

[0016] Preferably, the preparation raw materials of the bio-based oxygen bleaching stabilizer include the following components by mass percentage: tetrasodium glutamate diacetate 10% to 20% (for example, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18% or 19% and the like), sodium gluconate 5% to 10% (for example, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9% or 9.5% and the like), polyepoxysuccinic acid 3% to 10% (for example, 4%, 5%, 6%, 7%, 8% or 9% and the like), starch graft polyacrylic acid 5% to 15% (for example, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13% or 14% and the like), magnesium salt 5% to 20% (for example, 7%, 9%, 11%, 13%, 15%, 17% or 19% and the like) and water 25% to 72% (for example, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65% or 70% and the like).

[0017] In the present application, the tetrasodium glutamate diacetate and sodium gluconate are used as chelating agents, and the main raw material for preparing tetrasodium glutamate diacetate is sodium glutamate which is a natural fermentation product, biodegradable, and does not contain phosphorus, which is more in line with environmental protection requirements. Tetrasodium glutamate diacetate can exist stably in an acidic environment and can chelate iron ions. In an alkaline condition, it can be widely used as an aminopolycarboxylic acid and can chelate calcium ions and other metal ions well. Moreover, tetrasodium glutamate diacetate can maintain stable performance in a high-temperature environment for a long time. Sodium gluconate has strong complexing ability for calcium ions, magnesium ions and iron ions, and strong scale inhibition ability, especially for Fe 3+ has excellent chelation, even in the full pH range.

[0018] In the present application, the polyepoxysuccinic acid and starch grafted polyacrylic acid are used as scale inhibitors, and the polyepoxysuccinic acid is a nitrogen-free, non-phosphorus organic compound with dual functions of scale inhibition and corrosion inhibition; and in the solution, it can form a colloidal substance to adsorb Fe 3+ , Cu 2+ and other metal ions, so that they lose catalytic activity, thereby playing a stabilizing role on hydrogen peroxide, and it has good biodegradability and is suitable for high-alkaline and high-metal-content water systems, and is a green water treatment chemical. The starch grafted polyacrylic acid is a simple and readily available natural polymer-based bifunctional water treatment agent with high-efficiency scale inhibition and flocculation, and is environmentally friendly.

[0019] In the present application, the magnesium salt mainly plays a passivation role, improves the alkali resistance of hydrogen peroxide, and can generate positively charged Mg(OH)2 flocculent colloidal particles in an alkaline oxygen bleaching solution, has adsorption effect, and can prevent hydrogen peroxide from further reacting to generate HOO· free radicals, thereby inhibiting the reaction chain of hydrogen peroxide.

[0020] In the present application, through the synergistic effect of the chelating agent, the scale inhibitor and the magnesium salt, the bio-based oxygen bleaching stabilizer has both adsorption performance and chelation. By interacting between raw materials in a certain proportion, the advantages are taken and the disadvantages are avoided, the respective advantages are retained, the respective shortcomings are overcome, the cost is reduced, the hydrogen peroxide is more stable in the bleaching process of the oxygen bleaching process, the fabric after treatment has higher whiteness, and the strength damage is smaller.

[0021] In a second aspect, the present application provides a preparation method of the bio-based oxygen bleaching stabilizer according to the first aspect, and the preparation method comprises mixing and reacting an amino acid chelating agent, sodium gluconate, polyepoxysuccinic acid, a starch grafting product, a passivation agent and water to obtain the bio-based oxygen bleaching stabilizer.

[0022] Preferably, the preparation method specifically comprises the following steps:

[0023] (1) Mix sodium gluconate, passivation agent and water to obtain a mixture.

[0024] (2) Mix the mixture obtained in step (1), amino acid chelating agent, polyepoxysuccinic acid and starch graft to stir and react to obtain the bio-based oxygen bleaching stabilizer.

[0025] Preferably, the mixing further comprises a filtering step.

[0026] In a third aspect, the application provides an application of the bio-based oxygen bleaching stabilizer as described in the first aspect in a pretreatment bleaching process of a fabric.

[0027] Compared with the prior art, the application has the following beneficial effects:

[0028] The raw materials for preparing the bio-based oxygen bleaching stabilizer described in the application include a combination of amino acid chelating agent, sodium gluconate, polyepoxysuccinic acid, starch graft, passivation agent and water, so that the bio-based oxygen bleaching stabilizer has both adsorption performance and chelation effect, and the bio-based oxygen bleaching stabilizer has no silicon, no phosphorus and no environmental pollution, and the application of the bio-based oxygen bleaching stabilizer in a pretreatment oxygen bleaching process of a fabric can make the fabric have higher whiteness and less strength damage. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a comparison chart of hydrogen peroxide decomposition rate determination results when the bio-based oxygen bleaching stabilizers provided in Examples 1-6 and the oxygen bleaching stabilizer provided in Comparative Example 1 are added respectively. DETAILED DESCRIPTION

[0030] The technical solutions of the application will be further described below through specific embodiments. Those skilled in the art should understand that the embodiments are only used to help understand the application and should not be regarded as specific limitations on the application.

[0031] Some components in the examples and comparative examples are as follows:

[0032] Polyepoxysuccinic acid: item number P923986, analytical pure, manufacturer: Shanghai Maikelin Biochemical Technology Co., Ltd.

[0033] Starch grafted polyacrylic acid: acrylic acid grafted starch 300, manufacturer: Beijing Taide Pharmaceutical Co., Ltd.

[0034] Example 1

[0035] The example provides a bio-based oxygen bleaching stabilizer and a preparation method thereof, and the bio-based oxygen bleaching stabilizer includes the following components in mass percentage: tetrasodium glutamate diacetate 10%, sodium gluconate 5%, polyepoxysuccinic acid 3%, starch grafted polyacrylic acid 5%, magnesium sulfate 5% and water 72%.

[0036] The preparation method specifically comprises the following steps:

[0037] (1) sodium gluconate, magnesium sulfate are added into water in sequence to be dissolved by stirring at room temperature (25 DEG C), and a mixture is obtained;

[0038] (2) tetrasodium glutamate diacetate, polyepoxysuccinic acid and starch grafting polyacrylic acid are continuously added into the mixture prepared in step (1) to be mixed and reacted by stirring at room temperature (25 DEG C) for 2h, and filtration is carried out, so that the bio-based oxygen bleaching stabilizer is obtained.

[0039] Example 2

[0040] The embodiment provides a bio-based oxygen bleaching stabilizer and a preparation method thereof, and the difference from the embodiment 1 is that the mass percentage of sodium gluconate is adjusted to 8%, the mass percentage of water is adjusted to 69%, and other conditions are the same as those in the embodiment 1.

[0041] Example 3

[0042] The embodiment provides a bio-based oxygen bleaching stabilizer and a preparation method thereof, and the difference from the embodiment 1 is that the bio-based oxygen bleaching stabilizer comprises the following components in percentage by mass: tetrasodium glutamate diacetate 10%, sodium gluconate 8%, polyepoxysuccinic acid 6%, starch grafting polyacrylic acid 10%, magnesium sulfate 15% and water 51%, and other conditions are the same as those in the embodiment 1.

[0043] Example 4

[0044] The embodiment provides a bio-based oxygen bleaching stabilizer and a preparation method thereof, and the difference from the embodiment 1 is that the bio-based oxygen bleaching stabilizer comprises the following components in percentage by mass: tetrasodium glutamate diacetate 15%, sodium gluconate 8%, polyepoxysuccinic acid 6%, starch grafting polyacrylic acid 10%, magnesium sulfate 10% and water 51%, and other conditions are the same as those in the embodiment 1.

[0045] Example 5

[0046] The embodiment provides a bio-based oxygen bleaching stabilizer and a preparation method thereof, and the difference from the embodiment 1 is that the bio-based oxygen bleaching stabilizer comprises the following components in percentage by mass: tetrasodium glutamate diacetate 20%, sodium gluconate 10%, polyepoxysuccinic acid 10%, starch grafting polyacrylic acid 15%, magnesium sulfate 15% and water 30%, and other conditions are the same as those in the embodiment 1.

[0047] Example 6

[0048] The embodiment provides a bio-based oxygen bleaching stabilizer and a preparation method thereof, which are different from the embodiment 1 only in that the bio-based oxygen bleaching stabilizer comprises the following components in percentage by mass: tetrasodium glutamate diacetate 20%, sodium gluconate 10%, polyepoxysuccinic acid 10%, starch grafted polyacrylic acid 15%, magnesium sulfate 20% and water 25%, and other conditions are the same as those in the embodiment 1.

[0049] Embodiment 7

[0050] The embodiment provides a bio-based oxygen bleaching stabilizer and a preparation method thereof, which are different from the embodiment 1 only in that magnesium sulfate is replaced by magnesium chloride with the same mass, and other conditions are the same as those in the embodiment 1.

[0051] Embodiment 8

[0052] The embodiment provides a bio-based oxygen bleaching stabilizer and a preparation method thereof, which are different from the embodiment 1 only in that the percentage by mass of tetrasodium glutamate diacetate is adjusted to 6%, and the percentage by mass of water is adjusted to 76%, and other conditions are the same as those in the embodiment 1.

[0053] Embodiment 9

[0054] The embodiment provides a bio-based oxygen bleaching stabilizer and a preparation method thereof, which are different from the embodiment 1 only in that the percentage by mass of tetrasodium glutamate diacetate is adjusted to 24%, and the percentage by mass of water is adjusted to 58%, and other conditions are the same as those in the embodiment 1.

[0055] Comparative example 1

[0056] The comparative example provides an oxygen bleaching stabilizer, which is sodium silicate.

[0057] Comparative example 2

[0058] The comparative example provides a bio-based oxygen bleaching stabilizer and a preparation method thereof, which are different from the embodiment 1 only in that sodium gluconate is not added, the percentage by mass of tetrasodium glutamate diacetate is adjusted to 15%, and other conditions are the same as those in the embodiment 1.

[0059] Comparative example 3

[0060] The comparative example provides a bio-based oxygen bleaching stabilizer and a preparation method thereof, which are different from the embodiment 1 only in that tetrasodium glutamate diacetate is not added, and the percentage by mass of sodium gluconate is adjusted to 15%, and other conditions are the same as those in the embodiment 1.

[0061] Comparative example 4

[0062] The present comparative example provides a bio-based oxygen bleaching stabilizer and a preparation method thereof, which is only different from Example 1 in that no polyepoxysuccinic acid is added, the mass percentage of starch grafted polyacrylic acid is adjusted to 15%, and other conditions are the same as those in Example 1.

[0063] Comparative Example 5

[0064] The present comparative example provides a bio-based oxygen bleaching stabilizer and a preparation method thereof, which is only different from Example 1 in that no starch grafted polyacrylic acid is added, the mass percentage of polyepoxysuccinic acid is adjusted to 15%, and other conditions are the same as those in Example 1.

[0065] The bio-based oxygen bleaching stabilizers provided in Examples 1-9 and Comparative Examples 2-5, and the oxygen bleaching stabilizer provided in Comparative Example 1 are tested, and the specific test method is as follows:

[0066] (1) Determination of hydrogen peroxide decomposition rate

[0067] A 200 mL oxygen bleaching working solution is prepared by mixing the bio-based oxygen bleaching stabilizer or the oxygen bleaching stabilizer, NaOH, H2O2 and water, wherein the NaOH is 3 g / L, the H2O2 is 15 g / L, the bio-based oxygen bleaching stabilizer or the oxygen bleaching stabilizer is 16 g / L, and water is the solvent. A 200 mL blank oxygen bleaching working solution is prepared by mixing NaOH, H2O2 and water, wherein the NaOH is 3 g / L, the H2O2 is 15 g / L, and the blank is used for comparison.

[0068] The oxygen bleaching working solution or the blank oxygen bleaching working solution is moved into a ground triangular flask, and then placed in a constant temperature dyeing sample machine, oscillated at a frequency of 10 times / min, started from 40℃, and raised to 98℃ at a temperature raising rate of 2℃ / min. Then, 10 mL of solution was taken from the flask at 0 min, 15 min, 30 min, 45 min and 60 min, respectively, and the hydrogen peroxide decomposition rate was calculated according to the formula in HG / T 4916-2016 “Textile Dyeing and Finishing Auxiliaries Hydrogen Peroxide Stabilizer for Determination of Hydrogen Peroxide Stability”. The test results are shown in Table 1.

[0069] Table 1

[0070] (2) Chelating metal ion capacity: the chelating values of Fe 3+ and Ca 2+ are determined according to GB / T 21884-2008, and the test results are shown in Table 2.

[0071] Table 2

[0072] (3) Oxygen bleaching effect

[0073] A bio-based oxygen bleaching stabilizer or an oxygen bleaching stabilizer, NaOH, H2O2 and water were formulated into 200 mL of an oxygen bleaching working solution, wherein the NaOH was 3 g / L, the H2O2 was 15 g / L, and the bio-based oxygen bleaching stabilizer or the oxygen bleaching stabilizer was 16 g / L.

[0074] The fabric sample (21 x 21 full cotton poplin) after enzyme desizing was padded with the oxygen bleaching working solution, steamed at 102°C for 30 min, then washed with water, dried, and an oxygen bleached fabric sample was obtained.

[0075] Fabric strength: the oxygen bleached fabric sample was tested for tear strength according to GB / T 3917.2-2009 "Textiles - Determination of tear strength - Part 2: trouser tear (single seam)". The damage degree of the fabric was reflected by the strength value, and the greater the value, the smaller the damage degree of the fabric.

[0076] Fabric whiteness and capillary effect test: the fabric capillary effect of the oxygen bleached fabric sample was determined according to ZBW04019-1990 "Professional standard textile capillary effect test method". The greater the capillary effect value, the better the performance of the oxygen bleaching stabilizer. The test results are shown in Table 3.

[0077] Table 3

[0078] From the contents of Tables 1, 2 and 3, it can be seen that the bio-based oxygen bleaching stabilizers provided in Examples 1-9 effectively reduce the ineffective decomposition of hydrogen peroxide, so that hydrogen peroxide has better stability at 98°C; have good chelating ability for Fe 3+ and Ca 2+ , and have stronger chelating ability for Fe 3+ , the chelating value for Fe 3+ is 310-598 mg / g, the chelating value for Ca 2+ is 57-85 mg / g, the fabric has high bleaching whiteness and small damage during the bleaching process.

[0079] Compared with the blank sample, the working solution added with the bio-based oxygen bleaching stabilizer prepared in the examples slows down the ineffective decomposition of hydrogen peroxide and increases the stability of hydrogen peroxide during the bleaching of the fabric.

[0080] Compared with Comparative Example 1, the bio-based oxygen bleaching stabilizer prepared in Examples 3-6 further inhibited the decomposition of hydrogen peroxide, and the decomposition rate of hydrogen peroxide was smaller. The bio-based oxygen bleaching stabilizer prepared in Examples 5 and 6 had more obvious inhibition on the decomposition rate of hydrogen peroxide, indicating that the bio-based oxygen bleaching stabilizer had better stability to hydrogen peroxide. The decomposition rate of hydrogen peroxide in the working solution added with the oxygen bleaching stabilizer provided by Comparative Example 1 was still fast, causing part of the hydrogen peroxide to be wasted and the strength of the fiber to be reduced. The hydrogen peroxide decomposition rate determination results when the bio-based oxygen bleaching stabilizer provided by Examples 1-6 and the oxygen bleaching stabilizer provided by Comparative Example 1 were added, respectively, are shown in FIG. 1.

[0081] Compared with Comparative Example 1, the bio-based oxygen bleaching stabilizer prepared in Examples 1-9 had better chelating ability to Fe 3+ and Ca 2+ , and had stronger chelating ability to Fe 3+ . The bio-based oxygen bleaching stabilizer described in the present application chelates metal ions such as Fe 3+ and Ca 2+ , reduces the invalid decomposition of hydrogen peroxide by Fe 3+ , and effectively prevents the formation of calcium carbonate scale by chelating Ca 2+ and starch grafted polyacrylic acid to convert the stable calcite crystal form of calcium carbonate into the most unstable aragonite crystal form.

[0082] Compared with Comparative Example 1, the whiteness of the bleached fabric sample of the oxygen bleaching working solution added with the bio-based oxygen bleaching stabilizer prepared in Examples 1-9 was 76.53-79.89, which was higher than the whiteness 71.30 of Comparative Example 1, and the hairiness effect and weft tear strength were also higher. The whiteness and hairiness effect of the fabric sample bleached by adding the bio-based oxygen bleaching stabilizer described in the present application were better than those of Comparative Example 1, and the damage to the fabric sample was smaller.

[0083] Compared with Example 1, if the mass percentage of tetrasodium glutamate diacetate was too low (Example 8), the chelating ability of the bio-based oxygen bleaching stabilizer to Ca 2+ decreased, and the decomposition rate of hydrogen peroxide increased; if the mass percentage of tetrasodium glutamate diacetate was too high (Example 9), the chelating ability of the bio-based oxygen bleaching stabilizer to Ca 2+ and Fe 3+ slightly increased, but was not obvious, and the weft tear strength slightly decreased.

[0084] Compared with Example 1, if sodium gluconate was not added (Comparative Example 2), the chelating ability of the bio-based oxygen bleaching stabilizer to Fe 3+ rapidly decreased, and the whiteness, hairiness effect value, and weft tear strength of the bleaching effect were reduced; if tetrasodium glutamate diacetate was not added (Comparative Example 3), the chelating ability of the bio-based oxygen bleaching stabilizer to Ca 2+The ability of the bleaching agent to bleach the pulp decreased rapidly, and the brightness, capillary effect value and weft tear strength of the bleached pulp decreased; thus, it can be known that the performance of the bio-based oxygen bleaching stabilizer prepared by compounding sodium gluconate and tetrasodium glutamate diacetate as chelating agents is better.

[0085] In comparison with Example 1, if polyepoxysuccinic acid is not added (Comparative Example 4), the bio-based oxygen bleaching stabilizer chelates Ca 2+ ; if starch grafted polyacrylic acid is not added (Comparative Example 5), the ability of the bio-based oxygen bleaching stabilizer to chelate Ca 2+ ; thus, it can be known that the performance of the bio-based oxygen bleaching stabilizer prepared by compounding polyepoxysuccinic acid and starch grafted polyacrylic acid as scale inhibitors is better.

[0086] The applicant declares that the process method of the present application is illustrated by the above examples, but the present application is not limited to the above process steps, that is, it does not mean that the present application must rely on the above process steps to be implemented. It should be understood by those skilled in the art that any improvement of the present application, equivalent replacement of the raw materials selected by the present application, addition of auxiliary ingredients, selection of specific methods, etc. fall within the protection scope and disclosure scope of the present application.

Claims

1. A bio-based oxygen bleaching stabilizer, raw materials of which comprise an amino acid chelating agent, sodium gluconate, polyepoxysuccinic acid, starch graft, a passivator and water.

2. The bio-based oxygen bleach stabilizer of claim 1, wherein, The amino acid chelating agent comprises tetrasodium glutamate diacetate.

3. The bio-based oxygen bleach stabilizer of claim 1 or 2, wherein, The starch graft comprises starch grafted polyacrylic acid.

4. The bio-based oxygen bleach stabilizer according to any one of claims 1-3, wherein, The passivator comprises a magnesium salt.

5. The bio-based oxygen bleach stabilizer according to any one of claims 1-4, wherein, The magnesium salt comprises magnesium sulfate and / or magnesium chloride.

6. The bio-based oxygen bleach stabilizer according to any one of claims 1-5, wherein, The raw materials of the bio-based oxygen bleaching stabilizer comprise, by mass percentage, 10%-20% of the amino acid chelating agent, 5%-10% of the sodium gluconate, 3%-10% of the polyepoxysuccinic acid, 5%-15% of the starch graft, 5%-20% of the passivator and 25%-72% of the water.

7. The bio-based oxygen bleach stabilizer according to any one of claims 1-6, wherein, The raw materials of the bio-based oxygen bleaching stabilizer comprise, by mass percentage, 10%-20% of tetrasodium glutamate diacetate, 5%-10% of sodium gluconate, 3%-10% of polyepoxysuccinic acid, 5%-15% of starch grafted polyacrylic acid, 5%-20% of a magnesium salt and 25%-72% of water. 8.A method for preparing the bio-based oxygen bleaching stabilizer according to any one of claims 1-7, which comprises mixing and reacting an amino acid chelating agent, sodium gluconate, polyepoxysuccinic acid, a starch graft, a passivator and water to obtain the bio-based oxygen bleaching stabilizer.

9. The production method according to claim 8, wherein The method specifically comprises the following steps: (1) mixing sodium gluconate, a passivator and water to obtain a mixture; (2) mixing the mixture obtained in step (1), an amino acid chelating agent, polyepoxysuccinic acid and a starch graft, and stirring and reacting to obtain the bio-based oxygen bleaching stabilizer; Preferably, the method further comprises a filtration step after the mixing. 10.Use of the bio-based oxygen bleaching stabilizer according to any one of claims 1-7 in the pretreatment bleaching process of fabrics.

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