Natural product derivative-based continuous degreaser for nylon fabric and preparation method of natural product derivative-based continuous degreaser

Abstract

The invention relates to a natural product derivative-based continuous degreaser for nylon fabrics and a preparation method thereof. The degreasing agent is prepared from the following components in parts by mass: 35 to 55 parts of intermediate N, 10 to 20 parts of rhodinol polyoxyethylene ether, 5 to 10 parts of polyaspartic acid and 20 to 40 parts of deionized water. The natural product derivative-based continuous degreasing agent for the nylon fabric is suitable for an open-width continuous refining and degreasing process of the nylon fabric, has excellent emulsification, dispersion and anti-back-tack properties on nylon spinning oil, can effectively improve the pretreatment process efficiency of the nylon fabric, and is energy-saving and emission-reducing.

Description

Technical Field

[0001] The invention relates to a degreasing agent based on natural product derivatives, in particular to a continuous degreasing agent based on natural product derivatives for nylon fabrics and a preparation method thereof. Background Art

[0002] Nylon (also known as nylon) is an important synthetic fiber, which is widely used in the textile industry due to its excellent wear resistance, wrinkle resistance, resilience and good dyeability. However, in the spinning process of nylon fiber, in order to improve the spinnability of the fiber, a large amount of spinning oil, such as mineral oil, knitting oil, dimethyl silicone oil, etc., needs to be added. These oils need to be effectively removed before dyeing nylon fabrics to prevent problems such as oil spots, color difference, and color change during the dyeing process. Compared with polyester, nylon has a stronger adsorption of oil stains on fabrics due to its unique molecular structure, making it more difficult to fall off and remove. At present, in actual production, dyeing plants mostly use OS machines or BO machines for continuous degreasing of nylon fabrics in order to improve production efficiency and reduce wastewater discharge. The degreasing process is characterized by fast speed, short cloth-liquid contact time and long working liquid replacement time. This requires the degreasing agent to quickly emulsify the oil on the fiber in a short time and evenly disperse it in the working liquid. At the same time, it is necessary to prevent the oil and impurities from condensing and causing back staining due to long-term non-replacement of the working liquid.

[0003] In the currently disclosed patents, most of the components of organic solvents are added to improve the rapid degreasing and emulsifying properties of the additives. However, organic solvents such as tetrachloroethylene that are effective for spinning oils are harmful to the environment.

[0004] The Chinese invention patent with publication number CN109370795B and titled "Degreasing agent for continuous processing of polyester / ammonia and nylon / ammonia blended knitted fabrics and its preparation method" discloses a degreasing agent for continuous processing prepared from polyoxyalkylene nonionic surfactants, chelating agents, fluorocarbon surfactants, organic fluorine finishing agents, organic solvents, etc. The degreasing agent has good oil removal, emulsification and dispersibility, anti-re-staining and rapid penetration, but the organic fluorine and organic solvents in its components are not good for the environment.

[0005] The Chinese invention patent with publication number CN105463849B and titled "A Phosphorus-free Scouring Agent for Nylon Fabrics and Preparation Method" discloses a phosphorus-free scouring agent prepared from lauroyl monoethanolamine succinate monoester polyoxyethylene ether, isomeric tridecanol polyoxyethylene ether, linear dodecanol polyoxyethylene ether and water. It has the characteristics of being environmentally friendly and pollution-free, and having good scouring and degreasing effects, but it is only applicable to nylon intermittent scouring and degreasing processes, and is not applicable to nylon continuous degreasing processes. Summary of the invention

[0006] In order to solve the above technical problems, the object of the present invention is to provide a continuous degreasing agent based on natural product derivatives for nylon fabrics and a preparation method thereof.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A continuous degreasing agent based on natural product derivatives for nylon fabrics comprises the following formula in parts by mass: 35 to 55 parts of intermediate N, 10 to 20 parts of rose alcohol polyoxyethylene ether, 5 to 10 parts of polyaspartic acid and 20 to 40 parts of deionized water.

[0008] Preferably, the preparation of the intermediate N includes the following synthesis method and steps, which are proportioned by mass: (1) 100-120 parts of bergamot phenol and 0.1-0.5 parts of potassium hydroxide are added to a tank reactor, and 261-393 parts of ethylene oxide are introduced under a pressure of 0.1-0.3 MPa. After the temperature is raised to 100°C-130°C and the reaction is maintained for 2-3 hours, the temperature is lowered to below 50°C, and the material is discharged to obtain bergamot phenol polyoxyethylene ether.

[0009] The reaction formula is as follows:

[0010] Where n=12~15.

[0011] (2) Add 100-120 parts of bergamot phenol polyoxyethylene ether, 4-10 parts of isopropylamine and 0.5-1 part of sodium ethoxide into a tank reactor, raise the temperature to 80°C-100°C, keep the temperature at 80°C-100°C for reaction for 2-3 hours, then cool the temperature to below 50°C to obtain intermediate N.

[0012] The reaction formula is as follows: Where n=12~15.

[0013] Preferably, the average number of polyoxyethylene repeating units in the molecular structure of the bergamot phenol polyoxyethylene ether is 12-15; the average number of polyoxyethylene repeating units in the molecular structure of the rose alcohol polyoxyethylene ether is 6-10.

[0014] Preferably, the degreasing agent is used in the pre-treatment process of nylon fabric.

[0015] Due to the application of the above technical solution, the present invention has the following advantages: In the degreasing agent component, bergamot phenol, a natural plant extract, is subjected to an addition reaction with ethylene oxide to generate bergamot phenol polyoxyethylene ether, which is then subjected to an aminolysis reaction with isopropylamine to obtain an intermediate N. The presence of the amide group in the structure enhances its affinity for nylon fibers, and the structure has excellent emulsification, dispersion and anti-re-staining properties for nylon spinning oils; rose alcohol polyoxyethylene ether not only has good compatibility with spinning oils, but also has certain wetting and permeability, which enables the additive to wet and penetrate the fibers in a very short time, and is helpful for the separation of the oil and the fibers; polyaspartic acid has excellent chelating and dispersibility, which can effectively reduce the influence of metal ions and various impurities in the working fluid on the degreasing process, extend the use time of the working fluid, and save energy and reduce emissions. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with specific embodiments. Example

[0017] According to the mass fraction of the degreasing agent component converted into specific mass, 100 g of bergamot phenol and 0.2 g of potassium hydroxide were put into an autoclave reactor, and 265 g of ethylene oxide was introduced under a pressure of 0.25 MPa. After the temperature was raised to 120°C and kept for reaction for 2 hours, the temperature was lowered to below 50°C and the material was discharged to obtain bergamot phenol polyoxyethylene ether with an average polyoxyethylene repeating unit number of 12.

[0018] 100 g of bergamot phenol polyoxyethylene ether, 4 g of isopropylamine and 0.5 g of sodium ethoxide were put into a tank reactor, heated to 80°C and kept for reaction for 2 hours, then cooled to below 50°C and discharged to obtain intermediate N.

[0019] 50g of intermediate N, 20g of rose alcohol polyoxyethylene ether with an average polyoxyethylene repeating unit number of 7, 10g of polyaspartic acid and 40g of deionized water are put into a tank reactor, stirred evenly and then discharged to obtain a finished product, a continuous degreasing agent based on natural product derivatives for nylon fabrics. Example

[0020] According to the mass fraction of the degreasing agent component converted into specific mass, 100 g of bergamot phenol and 0.2 g of potassium hydroxide were put into an autoclave reactor, and 265 g of ethylene oxide was introduced under a pressure of 0.25 MPa. After the temperature was raised to 120°C and kept for reaction for 2 hours, the temperature was lowered to below 50°C and the material was discharged to obtain bergamot phenol polyoxyethylene ether with an average polyoxyethylene repeating unit number of 12.

[0021] 100 g of bergamot phenol polyoxyethylene ether, 5 g of isopropylamine and 0.2 g of sodium ethoxide were put into a tank reactor, heated to 80°C and kept for reaction for 2 hours, then cooled to below 50°C and discharged to obtain intermediate N.

[0022] 50g of intermediate N, 15g of rose alcohol polyoxyethylene ether with an average polyoxyethylene repeating unit number of 7, 10g of polyaspartic acid and 40g of deionized water were put into a kettle reactor, stirred evenly and then discharged to obtain a finished product, a continuous degreasing agent based on natural product derivatives for nylon fabrics. Example

[0023] According to the mass fraction of the degreasing agent component converted into specific mass, 100 g of bergamot phenol and 0.2 g of potassium hydroxide were put into an autoclave reactor, and 265 g of ethylene oxide was introduced under a pressure of 0.25 MPa. After the temperature was raised to 120°C and kept for reaction for 2 hours, the temperature was lowered to below 50°C and the material was discharged to obtain bergamot phenol polyoxyethylene ether with an average polyoxyethylene repeating unit number of 12.

[0024] 100 g of bergamot phenol polyoxyethylene ether, 6 g of isopropylamine and 0.2 g of sodium ethoxide were put into a tank reactor, heated to 80°C and kept for reaction for 2 hours, then cooled to below 50°C and discharged to obtain intermediate N.

[0025] 50g of intermediate N, 10g of rose alcohol polyoxyethylene ether with an average polyoxyethylene repeating unit number of 7, 10g of polyaspartic acid and 40g of deionized water are put into a tank reactor, stirred evenly and then discharged to obtain a finished product, a continuous degreasing agent based on natural product derivatives for nylon fabrics.

[0026] 1. Fabrics and auxiliaries Fabric: Nylon knitted fabric (70D twill) Domestic M: Nylon Scouring and Degreasing Agent M-118 (Hangzhou Meigao Huayi Chemical Co., Ltd.) Imported F: High-efficiency degreasing agent FORYL EWX-E (Kekai Fine Chemicals (Shanghai) Co., Ltd.) (II) Application process 1. Preparation of test oil: first mix 10# white mineral oil, gear oil, dimethyl silicone oil and black engine oil in a ratio of 1:1:1:1 to make the test oil.

[0027] 2. Oilcloth production: Cut 5g of nylon knitted cloth (after degreasing), drop 0.1 ml of test oil on the center of the cloth, wait for the oil to wet, and use a high-temperature setting machine at 175℃ for 45 seconds.

[0028] 3. Degreasing liquid ratio: Degreasing agent 8g / L Liquid caustic soda (32% NaOH) 10g / L Process flow: After the working liquid is heated to 100℃, put it into oilcloth, keep it warm for 2 minutes, then wash and dry it.

[0029] (III) Test indicators and methods 1. Oil removal: With reference to GB / T 251-2008 “Grey Scale for Assessing Staining in Textiles for Colour Fastness Tests”, the degree of oil removal is judged by the human eye, and the grey scale for staining is used for comparative rating. The oil removal effect is divided into 5 levels, with 5 being the best and 1 being the worst.

[0030] 2. Emulsification: Prepare the degreasing agent into a 1g / L aqueous solution, take 30mL of the aqueous solution and 30mL of the special oil in a 100mL tall beaker, homogenize for 60s at a speed of 1000r / min with a homogenizer, and place it in a 100mL measuring cylinder, and record the time required for the lower layer to separate into 5mL of water phase. The longer the time, the stronger the emulsification power.

[0031] 3. Permeability: Prepare 10g / L degreasing agent into 200mL working solution, test it with the standard canvas method, and record the time it takes for the canvas to sink to the bottom.

[0032] Application Effect

[0033] From the above data, it can be seen that the degreasing, emulsifying and permeability of each embodiment of the present invention in nylon fabric are better than those of the market sample control; finally, it should be pointed out that the above embodiments are only more representative examples of the present invention. Obviously, the technical solution of the present invention is not limited to the above embodiments, and there can be many variations. All variations directly derived or associated from the content disclosed in the present invention should be considered as the protection scope of the present invention.

Claims

1. A continuous degreasing agent based on natural product derivatives for nylon fabrics, characterized in that: The formula composition by mass is: 35-55 parts of intermediate N, 10-20 parts of rose alcohol polyoxyethylene ether, 5-10 parts of polyaspartic acid and 20-40 parts of deionized water.

2. The continuous degreasing agent based on natural product derivatives for nylon fabric according to claim 1, characterized in that The preparation of the intermediate N includes the following synthesis methods and steps, which are proportioned by mass: (1) adding 100-120 parts of bergamot phenol and 0.1-0.5 parts of potassium hydroxide into a tank reactor, introducing 261-393 parts of ethylene oxide under a pressure of 0.1-0.3 MPa, heating to 100°C-130°C for 2-3 hours, cooling to below 50°C, discharging and discharging the material, and obtaining bergamot phenol polyoxyethylene ether; (2) Add 100-120 parts of bergamot phenol polyoxyethylene ether, 4-10 parts of isopropylamine and 0.5-1 part of sodium ethoxide into a tank reactor, raise the temperature to 80°C-100°C, keep the temperature at 80°C-100°C for reaction for 2-3 hours, then cool the temperature to below 50°C to obtain intermediate N.

3. The continuous degreasing agent based on natural product derivatives for nylon fabric according to claim 1, characterized in that The average number of polyoxyethylene repeating units in the molecular structure of the bergamot phenol polyoxyethylene ether is 12 to 15, and the average number of polyoxyethylene repeating units in the molecular structure of the rose alcohol polyoxyethylene ether is 6 to 10.

4. The continuous degreasing agent based on natural product derivatives for nylon fabric according to claim 1, characterized in that The degreasing agent is applied to the pre-treatment process of nylon fabric.

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