Environment-friendly low-temperature scouring agent and preparation method thereof

Abstract

The invention discloses an environment-friendly low-temperature scouring agent and a preparation method thereof, and belongs to the technical field of textile assistants. Comprising the following components: fatty alcohol-polyoxyethylene ether, cardanol polyoxyethylene ether sodium sulfate, secondary alkyl sodium sulfonate, a Schiff base copper complex, an organic solvent and water. The preparation method comprises the following steps: firstly, respectively taking the sodium cardanol polyoxyethylene ether sulfate, the linear fatty alcohol-polyoxyethylene ether, the isomeric fatty alcohol-polyoxyethylene ether and the secondary alkyl sodium sulfonate, putting into a reaction kettle, adding water, heating to 50-60 DEG C, and stirring for 50-60 minutes; and then cooling to be less than 40 DEG C, then adding the Schiff base copper complex and the organic solvent, and continuously stirring for 30-60 minutes to obtain the scouring agent. The preparation method is simple and easy to operate, the prepared refining agent does not contain APEO, phosphorus and other substances, meanwhile, when the refining agent is used for scouring and bleaching treatment, the bleaching temperature of hydrogen peroxide can be reduced from 98-100 DEG C to 70-85 DEG C for bleaching, a large amount of steam needed in the bleaching process is avoided, energy is saved, emission is reduced, and low carbon and economy are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of textile auxiliaries, and in particular to an environmentally friendly low-temperature scouring agent and a preparation method thereof. Background Art

[0002] With the development of economy and society, environmental issues have become a major problem. At present, the attention paid to environmental protection issues in the textile industry has also been raised to a new level. Traditional scouring agent raw materials are gradually replaced by new environmentally friendly and efficient scouring agent raw materials. Due to the long processing time, low efficiency and high energy consumption, the traditional pre-treatment scouring and bleaching process has gradually developed into a pre-treatment low-temperature short-process process. The pre-treatment low-temperature short-process process has the advantages of relatively less equipment, short processing time, high efficiency, saving water, electricity and other energy, and meeting environmental protection requirements.

[0003] In order to ensure the product quality and processing efficiency of the pre-treatment low-temperature short-process processing technology, and to ensure that the fabric has a high amount of liquid during the processing, which is enough to ensure that there are enough reactants on the fabric during the short-process processing, higher requirements are placed on the scouring agent. In the textile industry, the scouring agent, alkali and hydrogen peroxide are used in combination to remove a series of impurities such as pigments, pectin, grease, cotton wax, etc. in cotton fabrics and bleach the fabrics to meet the requirements of factory production. This requires the scouring agent to have high penetration, high alkali resistance, strong cleaning power and strong emulsification power, so that it has a low-temperature scouring effect.

[0004] With the development of science and technology and the gradual strengthening of people's environmental awareness, the international textile market has higher and higher requirements for green textiles. However, many varieties of scouring agents commonly used in textiles contain APEO, phosphorus and other substances. Due to the carcinogenicity, teratogenicity and mutagenicity of APEO, the printing and dyeing industry faces great pressure on wastewater treatment. In addition, the bleaching efficiency of hydrogen peroxide is low under low temperature conditions, so it needs to be carried out at a high temperature of 98-100℃, consuming a lot of steam, but high temperature and high alkali will cause greater damage to the fabric after pre-treatment.

[0005] In view of the above problems, the present invention provides an environmentally friendly low-temperature scouring agent and a preparation method thereof. Summary of the invention

[0006] The purpose of the present invention is to provide an environmentally friendly low-temperature scouring agent and a preparation method thereof, so as to solve the problems mentioned in the above background technology that the existing scouring agent pollutes the environment, the low-temperature hydrogen peroxide bleaching efficiency is low, and the high temperature damages the fabric.

[0007] To achieve the above object, the present invention provides an environmentally friendly low-temperature scouring agent, comprising the following components: fatty alcohol polyoxyethylene ether, cardanol polyoxyethylene ether sodium sulfate, secondary alkyl sulfonate sodium, Schiff base copper complex, organic solvent and water.

[0008] Preferably, the structural formula of the fatty alcohol polyoxyethylene ether is RO(CH2CH2O) n H, wherein R represents a saturated or unsaturated C12-C18 hydrocarbon group, and n=5-18; the fatty alcohol polyoxyethylene ether includes straight-chain fatty alcohol polyoxyethylene ether and isomeric fatty alcohol polyoxyethylene ether.

[0009] Preferably, the amount of each component is as follows, by mass percentage: 12%-16% of linear fatty alcohol polyoxyethylene ether, 5%-8% of isomerized fatty alcohol polyoxyethylene ether, 20%-25% of cardanol polyoxyethylene ether sodium sulfate, 16%-20% of secondary alkyl sodium sulfonate, 0.5-1.5% of Schiff base copper complex, 1%-7% of organic solvent, and 30%-40% of water.

[0010] Preferably, the amount of each component is as follows, by mass percentage: 10% of linear fatty alcohol polyoxyethylene ether, 8% of isomeric fatty alcohol polyoxyethylene ether, 24% of cardanol polyoxyethylene ether sodium sulfate, 16% of secondary alkyl sodium sulfonate, 0.5% of Schiff base copper complex, 2% of organic solvent, and 39.5% of water.

[0011] Preferably, the organic solvent is one of ethylene glycol monobutyl ether, isopropanol, ethanol and diethylene glycol.

[0012] The present invention also provides a method for preparing the above-mentioned environmentally friendly low-temperature scouring agent, comprising the following steps:

[0013] S1, respectively take cardanol polyoxyethylene ether sodium sulfate, linear fatty alcohol polyoxyethylene ether, isomeric fatty alcohol polyoxyethylene ether and secondary alkyl sodium sulfonate, put them into a reaction kettle, add water, heat and stir;

[0014] S2, cooling, then adding Schiff base copper complex and organic solvent and continuing to stir to obtain a scouring agent.

[0015] Preferably, in step S1, the temperature is raised to 50-60°C and the stirring time is 50-60 minutes.

[0016] Preferably, in step S2, the temperature is lowered to <40°C and the stirring time is 30-60 min.

[0017] The traditional cotton knitted fabric pre-treatment process usually uses high alkali and high temperature (above 95°C) for scouring and bleaching, which not only causes great damage to the fabric strength, increased weight loss rate of the fabric, rough feel, etc., but also consumes a lot of energy. The low-temperature pre-treatment process uses medium and low temperature pre-treatment additives to reduce the treatment temperature, so that the cotton fabric can complete the scouring and bleaching treatment at a lower temperature, obtain better wool effect and whiteness, and effectively alleviate the creases and folds caused by high temperature on the fabric, while reducing energy consumption and improving production efficiency.

[0018] Fatty alcohol polyoxyethylene ether has good emulsification, dispersibility and washing properties, can effectively reduce surface tension, improve wettability and permeability. In addition to the properties of fatty alcohol polyoxyethylene ether, the anion of cardanol polyoxyethylene ether sodium sulfate can improve the alkali resistance of the system and is easier to degrade than conventional fatty alcohols. Fatty acid polyoxyethylene esters have good surface activities such as emulsification, solubilization, wetting, dispersibility, softening and antistatic. Organic solvents can improve the solubility between the above materials, and water is used as the medium.

[0019] The present invention can reduce the temperature of the entire working solution by adding Schiff base copper complex, a hydrogen peroxide activator, into the formula, improve the decomposition rate of hydrogen peroxide under low temperature conditions, and enable fabric processing to proceed smoothly at 70-80°C. Under alkaline conditions, hydrogen peroxide decomposes to obtain HOO-, which can react with carbonyl, conjugated structure, quinone group and other groups of the pigment to destroy its chromogenic structure, thereby achieving the purpose of bleaching. The low-temperature oxygen bleaching pre-treatment process breaks through the key technology of low-temperature preparation of hydrogen peroxide activators, solves the problems of slow decomposition rate and low bleaching efficiency of hydrogen peroxide under low temperature conditions, and when the refining agent prepared by the present invention is used for scouring and bleaching treatment, the bleaching temperature of hydrogen peroxide can be reduced from 98-100°C to 70-85°C for bleaching, avoiding the large amount of steam required for heating and keeping 100°C during the bleaching process, saving energy and reducing emissions, and achieving low-carbon economy.

[0020] The technical solution of the present invention is further described in detail below through embodiments. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. Any other changes, modifications, substitutions, combinations, simplifications made without violating the spirit and principle of the present invention should all be equivalent replacement methods and are included in the protection scope of the present invention. In addition, it should be understood that after reading the content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application, and all belong to the scope of protection of the present invention.

[0022] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0023] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0024] Unless otherwise specified in the present invention, the reagents, instruments, and equipment used are those commonly used by technicians in this field.

[0025] The invention provides an environmentally friendly low-temperature scouring agent, which comprises the following components: fatty alcohol polyoxyethylene ether, cardanol polyoxyethylene ether sodium sulfate, secondary alkyl sulfonate sodium, Schiff base copper complex, organic solvent and water.

[0026] In the present invention, the structural formula of fatty alcohol polyoxyethylene ether is RO(CH2CH2O) n H, wherein R represents a saturated or unsaturated C12-C18 hydrocarbon group, and n=5-18; the fatty alcohol polyoxyethylene ether includes a straight-chain fatty alcohol polyoxyethylene ether and an isomeric fatty alcohol polyoxyethylene ether.

[0027] In the present invention, the amount of each component is as follows, calculated by mass percentage: 12%-16% of linear fatty alcohol polyoxyethylene ether, 5%-8% of isomeric fatty alcohol polyoxyethylene ether, 20%-25% of cardanol polyoxyethylene ether sodium sulfate, 16%-20% of secondary alkyl sodium sulfonate, 0.5-1.5% of Schiff base copper complex, 1%-7% of organic solvent, and 30%-40% of water.

[0028] In the present invention, the organic solvent is one of ethylene glycol monobutyl ether, isopropanol, ethanol and diethylene glycol. The Schiff base copper complex is salicylaldehyde taurine Schiff base copper complex.

[0029] The present invention also provides a method for preparing the above-mentioned environmentally friendly low-temperature scouring agent, comprising the following steps:

[0030] S1, respectively take cardanol polyoxyethylene ether sodium sulfate, linear fatty alcohol polyoxyethylene ether, isomeric fatty alcohol polyoxyethylene ether and secondary alkyl sodium sulfonate, put them into a reaction kettle, add water, heat to 50-60°C, and stir for 50-60 minutes;

[0031] S2. Cooling to less than 40° C., then adding Schiff base copper complex and organic solvent and continuing stirring for 30-60 minutes to obtain a scouring agent.

[0032] Example 1

[0033] According to the mass percentage, the following raw materials are taken: 10% of linear fatty alcohol (C12-C14) polyoxyethylene ether (AEO9), 8% of isomerized fatty alcohol (C13) polyoxyethylene ether (TO70), 8% of cardanol (C15) polyoxyethylene ether sodium sulfate (C 29 H47 O8SNa) 24%, secondary alkyl sulfonate sodium (SAS60) 16%, salicylaldehyde taurine Schiff base copper complex 0.5%, isopropanol 2% and water 39.5%.

[0034] First, put the above-mentioned cardanol polyoxyethylene ether sodium sulfate, linear fatty alcohol polyoxyethylene ether, isomeric fatty alcohol polyoxyethylene ether and secondary alkyl sodium sulfonate into a reactor, add water, heat to 60 ° C, stir thoroughly for 60 minutes, after the solution is fully dissolved, cool to below 40 ° C, add hydrogen peroxide activator salicylaldehyde taurine Schiff base copper complex and isopropanol, continue stirring for 50 minutes, and obtain knitting low-temperature scouring agent.

[0035] Comparative Example

[0036] According to mass percentage, take the following raw materials, cardanol (C15) polyoxyethylene ether (C 29 H 48 O8) 27%, linear fatty alcohol (C12-C14) polyoxyethylene ether (AEO7) 15.0%, isomeric fatty alcohol (C13) polyoxyethylene ether (TO80) 9.0%, Schiff base copper complex 1.0% and water 48%.

[0037] First, put the above-mentioned cardanol polyoxyethylene ether, linear fatty alcohol polyoxyethylene ether, and isomerized fatty alcohol polyoxyethylene ether into a reactor, add water, heat to 60°C, and stir for 60 minutes. After the solution is fully dissolved, cool to below 40°C, add hydrogen peroxide activator Schiff base copper complex, and continue stirring for 30-60 minutes to obtain a knitting low-temperature scouring agent.

[0038] Performance Testing:

[0039] (1) The performance of the low-temperature scouring agent prepared in the embodiment of the present invention and the comparative example was tested respectively. During the test, the low-temperature scouring and bleaching of pure cotton knitted fabrics, polyester-cotton blended knitted fabrics or other cotton-containing blended knitted fabrics was performed, and the amount of knitting low-temperature scouring agent used was 0.5-1.5% owf (relative to the total mass of the fabric to be treated). The amount of caustic soda used can be less than that of the conventional process (scouring at 98°C), and the amount of hydrogen peroxide used can be equivalent to that of the conventional process.

[0040] Application effect description: The results are shown in Table 1, which shows the comparative results of the embodiment, comparative example and conventional commercially available refining agent products applied to pure cotton knitted fabrics. The process used in Table 1 is an impregnation process, and the fabric used is pure cotton knitted grey fabric.

[0041] (1) The instrument used for the whiteness test in Table 1 is the fully automatic whiteness tester WSB-3C.

[0042] (2) The capillary effect test method in Table 1 is: keep the scouring treated cloth sample in a constant humidity for 8 hours, cut it into strips of 5 cm in width × 20 cm in length, place it vertically in distilled water, and start the time. The height to which the water rises after 30 minutes is the capillary effect.

[0043] Table 1

[0044] index Example Comparative Example A sample of a conventional scouring agent on the market Process temperature 75℃ 75℃ 98℃ Process time 50min 50min 45min Amount of additives 0.8％ 0.8％ 0.8％ Caustic Soda 1.5g / l 1.5g / l 2g / l Hydrogen Peroxide 2g / l 2g / l 2g / l Whiteness 81.1 80.5 81.3 Gross effect 9.2 8.9 9.0

[0045] From the data in Table 1, it can be seen that when the refining agent prepared by the present invention is applied to the low-temperature refining of cotton knitted fabrics or cotton-containing knitted fabrics before treatment, compared with conventional refining agents, it can meet the factory production requirements, while saving the amount of caustic soda and steam, and is more in line with the environmental protection requirements of energy conservation and emission reduction.

[0046] Therefore, the present invention provides an environmentally friendly low-temperature scouring agent, which does not contain phosphorus or APE O, has high scouring efficiency and good whiteness, is suitable for the scouring and bleaching process of pure cotton knitted fabrics, polyester-cotton knitted fabrics and other cotton-containing knitted fabrics, and is particularly suitable for the low-temperature (70-80°C) scouring and bleaching process of pure cotton knitted fabrics. Compared with the traditional high-temperature (98°C) scouring process, it saves water, electricity and steam, is more in line with environmental protection requirements, can reduce the amount of caustic soda and hydrogen peroxide used in the scouring and bleaching process, and improves environmental protection.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. An environmentally friendly low-temperature scouring agent, characterized in that: The invention comprises the following components: fatty alcohol polyoxyethylene ether, cardanol polyoxyethylene ether sodium sulfate, sodium secondary alkyl sulfonate, Schiff base copper complex, organic solvent and water.

2. The environmentally friendly low-temperature scouring agent according to claim 1, characterized in that: The structural formula of the fatty alcohol polyoxyethylene ether is RO(CH2CH2O) n H, wherein R represents a saturated or unsaturated C12-C18 hydrocarbon group, and n=5-18; the fatty alcohol polyoxyethylene ether includes straight-chain fatty alcohol polyoxyethylene ether and isomeric fatty alcohol polyoxyethylene ether.

3. An environmentally friendly low-temperature scouring agent according to claim 2, characterized in that: Calculated by mass percentage, the amount of each component is as follows: 12%-16% of linear fatty alcohol polyoxyethylene ether, 5%-8% of isomerized fatty alcohol polyoxyethylene ether, 20%-25% of cardanol polyoxyethylene ether sodium sulfate, 16%-20% of secondary alkyl sodium sulfonate, 0.5-1.5% of Schiff base copper complex, 1%-7% of organic solvent, and 30%-40% of water.

4. An environmentally friendly low-temperature scouring agent according to claim 3, characterized in that: Calculated by mass percentage, the amount of each component is as follows: 10% of linear fatty alcohol polyoxyethylene ether, 8% of isomeric fatty alcohol polyoxyethylene ether, 24% of cardanol polyoxyethylene ether sodium sulfate, 16% of secondary alkyl sodium sulfonate, 0.5% of Schiff base copper complex, 2% of organic solvent, and 39.5% of water.

5. The environmentally friendly low-temperature scouring agent according to claim 1, characterized in that: The organic solvent is one of ethylene glycol monobutyl ether, isopropanol, ethanol and diethylene glycol.

6. The method for preparing an environmentally friendly low-temperature scouring agent according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, respectively take cardanol polyoxyethylene ether sodium sulfate, linear fatty alcohol polyoxyethylene ether, isomeric fatty alcohol polyoxyethylene ether and secondary alkyl sodium sulfonate, put them into a reaction kettle, add water, heat and stir; S2, cooling, then adding Schiff base copper complex and organic solvent and continuing to stir to obtain a scouring agent.

7. The method for preparing an environmentally friendly low-temperature scouring agent according to claim 6, characterized in that: In step S1, the temperature is raised to 50-60°C and the stirring time is 50-60 minutes.

8. The method for preparing an environmentally friendly low-temperature scouring agent according to claim 6, characterized in that: In step S2, the temperature is lowered to <40°C and the stirring time is 30-60 minutes.