Efficient spinning degreaser for wool fabric and preparation method of efficient spinning degreaser

Abstract

The invention discloses an efficient spinning degreaser for wool fabrics and a preparation method of the efficient spinning degreaser, and belongs to the technical field of degreasers. The efficient spinning degreaser for the wool fabric is prepared from the following substances in parts by mass: 5 to 15 parts of cationic modifier GTA, 2 to 8 parts of polyoxyethylene ether quaternary ammonium salt, 3 to 6 parts of solvent, 1.5 to 3.5 parts of surfactant and 15 to 20 parts of water. The efficient spinning degreaser for the wool fabric has the advantages of both a solvent and a surfactant, the use amount of the solvent is effectively reduced, so that the solvent can stably exist in a formula, the oil dissolving effect of the solvent is efficiently exerted, the felting property of the wool fiber fabric is reduced, meanwhile, the binding capacity between the wool fiber fabric and dye is improved, and the spinning effect of the wool fabric is improved. The industrial application can be realized.

Description

Technical Field

[0001] The invention relates to a wool fabric high-efficiency textile degreasing agent and a preparation method thereof, belonging to the technical field of degreasing agents. Background Art

[0002] During the spinning, weaving or transportation of wool fibers, the surface or wool fibers will always be stained with some oil. The oil on wool fabrics mainly includes fatty acid triglycerides, diglycerides and monoglycerides, etc. These components have extremely strong polarity and are easy to form hydrogen bonds with wool fibers, making the oil difficult to remove. The oil on wool fabrics also contains other impurities, such as lanolin and sheep sweat. Lanolin is a greasy and viscous substance, mainly composed of a mixture of esters formed by high-carbon fatty acids and high-carbon monohydric alcohols. It is insoluble in water but soluble in organic solvents such as ether and benzene. Sheep sweat is the secretion of sheep's sweat glands. The main components include potassium carbonate, potassium valerate, potassium stearate, etc., most of which are soluble in water. In addition, oil may be vaporized or carbonized under high temperature conditions, and then settle and adsorb on the surface of the fabric to form a tight film. Over time, these oil stains will become more solid and difficult to clean. Therefore, before dyeing, if these impurities and dirt are not removed, it will not only affect the color and feel of the fabric, but also affect the moisture absorption of the textile fabric, making the wool fiber dyeing uneven and not bright, and also affecting the dyeing fastness. In order to ensure the subsequent dyeing performance and prevent the appearance of color spots, color stains, color spots, and silicone oil spots, the wool fiber needs to be pre-treated before dyeing to remove the oil and oil stains on the surface. The purpose of degreasing is to remove the oil and oil stains on the wool fiber under the condition that the wool fiber is not damaged very much, so that the wool fiber fabric becomes a white, soft and well-wetting semi-finished printing and dyeing product.

[0003] In the pre-treatment process of wool fiber fabrics, chemical solvent degreasing is the most effective degreasing method. The oil stains dissolve quickly, but the amount of solvent used is relatively large, and the solvents are highly toxic, flammable, and explosive, so their use is restricted. At present, degreasing agents on the market generally have slow degreasing, incomplete degreasing, and single efficacy. Those with good degreasing effects are harmful to human health, pollute the environment, and are corrosive to wool fibers, skin, etc. due to their strong acid or alkalinity. Water-based degreasing agents are becoming the mainstream of the market. This degreasing agent is mainly composed of surfactants and various auxiliaries. It uses the cleaning effect of surfactants to remove oil stains. However, it requires stronger mechanical stirring to achieve the purpose of degreasing, and the degreasing efficiency is relatively low. In addition, due to processing cost constraints, most printing and dyeing factories use the method of degreasing and dyeing in the same bath to process wool fiber textile fabrics. This process has high requirements for degreasing agents, because the amount and quality of oil on textile fabrics vary. If the degreasing effect is not good, it will affect the coloring, uniformity, color light, color fastness, etc. of the dyeing. In addition, if the removed oil agent cannot be fully emulsified in the dye solution, it is easy to form coagulants when it comes into contact with the lipophilic dye and stain the cloth surface, causing color spots. Summary of the invention

[0004] In order to solve the shortcomings of wool fiber fabric degreasing agents in the prior art, such as slow degreasing, incomplete degreasing, oil stains on the fabric surface, and easy felting, a high-efficiency textile degreasing agent for pretreatment of wool fiber fabric is provided.

[0005] The present invention is achieved through the following technical solutions: The first object of the present invention is to provide a wool fabric high-efficiency textile degreasing agent, which is composed of the following substances in parts by mass: Cationic modifier GTA5-15 Polyoxyethylene ether quaternary ammonium salt 2-8 Solvent 3-6 Surfactant 1.5-3.5 Water 15-20.

[0006] The present invention prepares a degreasing agent that is more suitable for wool fabrics. When treating wool fabrics, on the one hand, in an acidic or alkaline environment, the cationic groups in the degreasing agent interact with -COOH or -OH after the hydrolysis of lanolin on the surface of the wool fabric to form hydrogen bonds and electrostatic adsorption. With the help of a small amount of mechanical energy (such as slight stirring or shaking) of external energy input, the oil and water phases can be automatically mixed into an emulsion by relying only on the emulsification ability of the degreasing agent of the present invention itself, so that the oil stains fall off the surface of the wool fiber fabric. The separated dirt and surfactant form a stable water-in-oil emulsion that is uniformly dispersed in the solvent. At the same time, the advantage of a small amount of solvent to quickly desorb the oil stains is combined to achieve the purpose of rapid degreasing. Compared with conventional degreasing agents, the degreasing agent of the present invention has the advantages of both solvents and surfactants, and effectively reduces the amount of solvent used, so that the solvent can be stably present in the formula and effectively exert its oil dissolving effect.

[0007] On the other hand, after the degreasing treatment with the degreasing agent of the present invention, the wool fiber fabric macromolecules carry a considerable number of cationic groups, which makes it carry positive charge, and then the wool fiber fabric will have positive charge under the specific principle of applying the dye bath, so as to achieve the purpose of changing the reaction properties of the wool fiber fabric. That is to say, by changing the charge of the surface of the wool fiber fabric, the positive charge on the wool fiber fabric at this time will have adsorption effect with the acid dye molecules, and this adsorption is very strong, which can change the dyeing properties of the wool fiber fabric, so that the binding ability between the wool fiber fabric and the dye will be improved, and the advantage shown is that the dye uptake rate of the dye is improved, which can also be said to be improved. The dye uptake rate of types of dyes that can react with positive charges, such as acid dyes, is improved.

[0008] In addition, a high concentration of -NH 4+ Ionized groups cannot diffuse out of the outer epidermis because the molecules connected to them are large. These soluble molecules in water will absorb a large number of water molecules to swell and soften the stratum corneum, thereby changing the directional friction effect of the wool fiber fabric and reducing the felt shrinkage of the wool fiber fabric.

[0009] In one embodiment of the present invention, the polyoxyethylene ether quaternary ammonium salt has the general structural formula:

[0010] In the formula, R 2 is one of an alkyl carbon chain or its derivatives; R 1 The structural formula is: , , or one of its derivatives, wherein m≥1, n≤80; In the formula, x≥6, y≤100.

[0011] In one embodiment of the present invention, in the general structural formula of the polyoxyethylene ether quaternary ammonium salt, 6≤x≤24, y≤100; 1≤m≤18, 1≤n≤80.

[0012] In one embodiment of the present invention, in the general structural formula of the polyoxyethylene ether quaternary ammonium salt, R 2 -CH 2 (CH 2 CH 2 ) 6 CH 3 .

[0013] In one embodiment of the present invention, in the general structural formula of the polyoxyethylene ether quaternary ammonium salt, x=y=10 or x=y=20.

[0014] In one embodiment of the present invention, the solvent is a degreasing agent oil phase, which is selected from one or more of ethylene glycol methyl ether, diethylene glycol methyl ether, dipropylene glycol methyl ether, dichloromethane, petroleum ether, and carbon tetrachloride.

[0015] In one embodiment of the present invention, the surfactant is selected from one or more of n-butanol, isobutanol and n-pentanol.

[0016] In one embodiment of the present invention, the solvent is dipropylene glycol methyl ether, and the surfactant is n-pentanol.

[0017] The second object of the present invention is to provide a method for preparing the wool fabric high-efficiency textile degreasing agent, comprising the following steps: The cationic modifier GTA, polyoxyethylene ether quaternary ammonium salt, solvent and surfactant additive are mixed uniformly according to parts by mass, and then gradually diluted with water to prepare the wool fabric high-efficiency textile degreasing agent.

[0018] The third object of the present invention is to provide a method for degreasing wool fabric before weaving, which comprises treating the wool fabric with the wool fabric high-efficiency weaving degreasing agent.

[0019] In one embodiment of the present invention, the method is to add the wool fabric high-efficiency textile degreasing agent to the working solution during the wool fabric pre-dyeing process, and specifically comprises the following steps: Add 0.05-20g / L of wool fabric high-efficiency textile degreasing agent and 0-40g / L of sodium carbonate into the working solution, heat the working solution to 60-80°C, pass the wool fabric through the working solution tank at a speed of 15-60m / min, and then wash with water.

[0020] In one embodiment of the present invention, the method is to add the wool fabric high-efficiency textile degreasing agent into the dyeing liquid of the wool fabric, and specifically comprises the following steps: (1) Add 0.05-20 g / L of wool fabric high-efficiency textile degreasing agent to the working liquid in the dye tank, put the wool fabric into the degreasing working liquid, heat it to 70-80°C at a heating rate of 4-6°C / min and keep it warm for 20-40 minutes; (2) Add acid dye to the working solution, heat it to 110-120°C at a heating rate of 8-10°C / min and keep it warm for 50-70 minutes; (3) Cool down to 20-30°C at a cooling rate of 8-10°C / min, then wash, dehydrate, dry, and perform reduction cleaning.

[0021] Beneficial effects of the present invention: The wool fabric high-efficiency textile degreasing agent of the present invention has the advantages of both solvent and surfactant, and effectively reduces the amount of solvent used, so that the solvent can stably exist in the formula, effectively exert its oil-dissolving effect, reduce the felt shrinkage of wool fiber fabric, and improve the bonding ability between wool fiber fabric and dye, so as to realize industrial application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 The oil removal rate curve of the wool fiber fabric high-efficiency textile oil removal agent obtained in the embodiment of the present invention; Figure 2 This is the anti-felting rate curve of the high-efficiency textile degreasing agent for wool fiber fabric obtained in the embodiment of the present invention; Figure 3 This is the mechanism diagram of the synthesis process of the cationic modifier GTA. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with specific examples. These implementation cases are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, after reading the content taught by 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 limited by the claims attached to the application.

[0025] The commercially available degreasing agent JS200 was purchased from Suzhou Jiesheng New Material Technology Co., Ltd., model JS-200.

[0026] The preparation method of cationic modifier GTA (2,3-epoxypropyltrimethylammonium chloride), the synthesis process mechanism is as follows Figure 3 As shown: First, 0.25 g of epichlorohydrin (EPIC) and 30 ml of acetone were added to a four-necked flask in sequence, and the flask was placed in an ice-water bath. After mechanical stirring for 30 minutes, trimethylamine (TMA) was added and the reaction was stirred for 30 minutes using a constant temperature magnetic stirrer. Then, the flask was stirred at room temperature for 4.5 hours and then distilled under reduced pressure. The flask was rapidly cooled in an ice-water bath, filtered and washed with acetone, and the acetone was recovered and vacuum dried to obtain white needle-shaped crystals of 2,3-epoxypropyltrimethylammonium chloride, in which the optimal mass molar ratio of TMA to EPIC was 0.25:1‌2.

[0027] The technical solution of the present invention is described in detail below in conjunction with specific embodiments. In the following embodiments, unless otherwise specified, the reagents, materials and equipment used can be purchased from commercial sources, or prepared by conventional methods, or are commonly used in the industry.

[0028] Embodiment 1-6: The raw material formula of the wool fiber fabric high-efficiency textile degreasing agent of the present invention is prepared according to Table 1, and the unit is mass percentage.

[0029] The preparation process of the embodiment is as follows: n-pentanol and dipropylene glycol methyl ether are added in sequence, a certain amount of water is gradually added to dilute, and then it is placed in a magnetic stirrer. After stirring at room temperature for 45 minutes, the cationic modifier GTA and polyoxyethylene ether quaternary ammonium salt are slowly added in sequence according to the mass parts in Table 1, and the reaction is stirred at 60 ° C for 6 hours to obtain a wool fabric high-efficiency textile degreasing agent, and finally gradually diluted to 0.25-10g / L working solution for application in the degreasing process.

[0030] Table 1 Raw material formula

[0031] Test example: (1) Oil removal rate evaluation The oil removal rate is calculated by the weight loss of oil in the oil removal process. Weigh the textile fabric and record the data W 1 , oiled, dried and shaped at high temperature before weighing W 2 , after degreasing process, washed and dried, weighed W 3 The oil removal rate formula is as follows:

[0032] (2) Anti-felt shrinkage calculation formula:

[0033] Among them A 0 is the initial area of ​​wool fiber fabric, A 1 The area of ​​wool fiber fabric after degreasing treatment.

[0034] (3) Color fastness Color fastness to washing: Determined in accordance with ISO 105 C10-2006 “Textiles - Tests for colour fastness - Part C10: Colour fastness to washing with soap or soda water”.

[0035] Colour fastness to rubbing: Determined in accordance with ISO 105 X12-2001 “Textiles - Tests for colour fastness - Part X12: Colour fastness to rubbing”.

[0036] Color fastness to sunlight: Determined in accordance with ISO 105 B02-2013 "Textiles - Tests for color fastness - Part B02: Fastness to artificial colored light: Xenon arc fading lamp".

[0037] (6) Dyeing rate The absorbance value of the dye solution at the maximum absorption wavelength before and after dyeing was tested by UV-visible spectrophotometer. The dye uptake rate E was calculated as follows:

[0038] In the formula: A0 is the absorbance of the original dye solution before dyeing; A1 is the absorbance of the residual dye solution after dyeing.

[0039] Taking the degreasing agent in Example 4 of the present invention as an example, it is not mixed with the dyeing liquid, and the degreasing process is carried out in a pre-treatment manner. The degreasing agent is diluted to: 0.8g / L, 1.2g / L, 1.6g / L, 2.0g / L to obtain a working solution. The textile grey fabric purchased by the enterprise is placed in the degreasing working solution of step 1 at room temperature, and then heated to 75°C at a heating rate of 5°C / min and kept warm for 15 minutes, followed by cold water washing, dehydration and drying. The degreasing rate data is as follows Figure 1 As shown, the anti-felt shrinkage data is as follows Figure 2 As shown, it can be seen that the degreasing agent prepared by the present invention has a good ability to remove water-soluble stains and oil-soluble oil stains. When the concentration is above 1.6 g / L, it has a strong degreasing ability, the degreasing rate reaches more than 91%, and the anti-felting rate reaches more than 89%; it can adapt to the rapid degreasing process and prevent oil re-staining.

[0040] The degreasing effect of commercially available degreasing agent JS-200 and the degreasing agent of Example 4 of the present invention was compared by using the above pretreatment process, wherein the concentration of the degreasing agent was 2.0 g / L. The results are shown in Table 2.

[0041] Table 2 Comparison of oil removal rate data between the market and the oil removal agent of the present invention (2.0 g / L)

[0042] The degreasing agent prepared in Examples 1 to 6 is mixed with the dye liquor to perform degreasing and dyeing treatment on wool fabric, and the treatment steps are as follows: (1) Add degreasing agent to the dyeing tank at a concentration of 2 g / L to prepare a degreasing working solution. Put the textile grey fabric purchased by the enterprise into the degreasing working solution at room temperature, and then heat it to 75°C at a heating rate of 5°C / min and keep it warm for 30 minutes; (2) Then add acid yellow 2G (2.5g / L) to the degreasing working solution at a concentration of 2.5g / L, heat it to 115°C at a heating rate of 10°C / min and keep it warm for 60 minutes; (3) Cool it to room temperature at a cooling rate of 10°C / min, then wash, dehydrate and dry it; (4) Put the dyed wool fabric into the dyeing tank at 40°C, heat it to 80°C at 1.5°C / min and keep it warm for 30 minutes (ultrasonic power is 100 W, ultrasonic reduction cleaning), then wash, dehydrate and dry it. The acidic reducing cleaning agent DM-8931 is 3.5g / L, soda ash is 2.5 g / L, bath ratio 1:50, to obtain wool fabric after degreasing dyeing treatment.

[0043] This method can effectively remove oil stains from large areas of wool fabrics and improve the bonding ability between wool fiber fabrics and dyes.

[0044] Table 3 Degreasing effect of the degreasing agent (2.0 g / L) of the market and the invention when treated with dye liquor in one bath

[0045] Compared with conventional degreasing agents, the degreasing agent prepared by the present invention has the advantages of both solvents and surfactants, and effectively reduces the amount of solvent used, so that the solvent can be stably present in the formula, effectively exert its oil-dissolving effect, reduce the felt shrinkage of wool fiber fabrics, and at the same time improve the bonding ability between wool fiber fabrics and dyes, and can be industrially applied.

[0046] The embodiments provided above are not intended to limit the scope of the present invention, and the steps described are not intended to limit the execution order thereof. Those skilled in the art may make obvious improvements to the present invention in combination with existing common knowledge, which also fall within the scope of protection defined by the claims of the present invention.

Claims

1. A wool fabric high-efficiency textile degreasing agent, characterized in that: By mass, it is composed of the following substances: Cationic modifier GTA5-15 Polyoxyethylene ether quaternary ammonium salt 2-8 Solvent 3-6 Surfactant 1.5-3.5 Water 15-20.

2. The high-efficiency degreasing agent for wool fabric according to claim 1, characterized in that: The general structural formula of polyoxyethylene ether quaternary ammonium salt is: In the formula, R2 is an alkyl carbon chain or one of its derivatives; The structural formula of R1 is: , , , or one of its derivatives, wherein m≥1, n≤80; In the formula, x≥6, y≤100.

3. The high-efficiency degreasing agent for wool fabric according to claim 2, characterized in that: In the general structural formula of the polyoxyethylene ether quaternary ammonium salt, 6≤x≤24, y≤100; 1≤m≤18, 1≤n≤80.

4. The high-efficiency degreasing agent for wool fabric according to any one of claims 2 or 3, characterized in that: In the general structural formula of the polyoxyethylene ether quaternary ammonium salt, x=y=10 or x=y=20.

5. The high-efficiency degreasing agent for wool fabric according to claim 1, characterized in that: The solvent is a degreasing agent oil phase, which is selected from one or more of ethylene glycol methyl ether, diethylene glycol methyl ether, dipropylene glycol methyl ether, dichloromethane, petroleum ether, and carbon tetrachloride.

6. The high-efficiency degreasing agent for wool fabric textiles according to claim 1, characterized in that: The surfactant is selected from one or more of n-butanol, isobutanol and n-pentanol.

7. A method for preparing the high-efficiency textile degreasing agent for wool fabric according to any one of claims 1 to 6, characterized in that: The steps include: The cationic modifier GTA, polyoxyethylene ether quaternary ammonium salt, solvent and surfactant additive are mixed uniformly according to parts by mass, and then gradually diluted with water to prepare the wool fabric high-efficiency textile degreasing agent.

8. A method for degreasing wool fabric before spinning, characterized in that: The wool fabric is treated with the wool fabric high-efficiency textile degreasing agent according to any one of claims 1 to 6.

9. The method according to claim 8, characterized in that The method comprises adding the wool fabric high-efficiency textile degreasing agent into a working solution during the wool fabric pre-dyeing process, and specifically comprises the following steps: Add 0.05-20g / L of wool fabric high-efficiency textile degreasing agent and 0-40g / L of sodium carbonate into the working solution, heat the working solution to 60-80°C, pass the wool fabric through the working solution tank at a speed of 15-60m / min, and then wash with water.

10. The method according to claim 8, characterized in that The method comprises adding the wool fabric high-efficiency textile degreasing agent into the wool fabric dyeing liquid, and specifically comprises the following steps: (1) Add 0.05-20 g / L of wool fabric high-efficiency textile degreasing agent to the working liquid in the dye tank, put the wool fabric into the degreasing working liquid, heat it to 70-80°C at a heating rate of 4-6°C / min and keep it warm for 20-40 minutes; (2) Add acid dye to the working solution, heat it to 110-120°C at a heating rate of 8-10°C / min and keep it warm for 50-70 minutes; (3) Cool down to 20-30°C at a cooling rate of 8-10°C / min, then wash, dehydrate, dry, and perform reduction cleaning.

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