Preparation method of low-color-change polyester high-temperature leveling agent based on modified epoxidized soybean oil

Abstract

The invention relates to a preparation method of a low-color-change polyester high-temperature leveling agent based on modified epoxidized soybean oil. Wherein the leveling agent is prepared from the following components in parts by mass: 30 to 50 parts of polyether amine modified epoxidized soybean oil, 15 to 25 parts of cardanol polyoxyethylene ether, 5 to 10 parts of castor oil polyoxyethylene ether, 5 to 20 parts of solvent and 15 to 30 parts of deionized water. The low-color-change high-temperature leveling agent is based on a natural product derivative, not only has excellent dye dispersity, migration property and oiling agent emulsification dispersity, but also has low influence on color yield of dyed fabric, and is suitable for dyeing of polyester fabric and a one-bath oil removal dyeing process.

Description

Technical Field

[0001] The invention relates to a low color change polyester high temperature leveling agent, and in particular to a preparation method of the low color change polyester high temperature leveling agent based on modified epoxidized soybean oil. Background Art

[0002] High-temperature leveling agent is the most commonly used auxiliary agent in polyester dyeing. Its purpose is to improve the dispersibility of dyes, improve dyeability, and prevent dyeing problems. With the increasing environmental protection requirements and the increasing market competition, more and more dyeing factories are reducing processes and saving energy and reducing emissions. For example, polyester degreasing and dyeing in one bath process, polyester weight reduction and water-free washing process, polyester rapid heating dyeing process, etc. However, while these processes can effectively shorten the process and improve efficiency, they also bring many problems. The reason is that after the process is shortened, there are more impurities such as slurry and oil on the fabric. Therefore, traditional high-temperature leveling agents are not enough to solve the above problems.

[0003] At present, the application of epoxidized soybean oil and modified epoxidized soybean oil in the patents disclosed is mainly in the field of bio-based epoxy resin and adhesive. For example, the invention patent with publication number CN117106196A and titled “A 0VOC water-based epoxy emulsion and its preparation method” discloses that a water-based epoxy resin emulsion is modified with epoxidized soybean oil, and polyetheramine is added for cross-linking to obtain a water-based epoxy primer with excellent performance and 0VOC; the invention patent with publication number CN105153645A and titled “A method for synergistically toughening epoxy resin with epoxidized soybean oil and polyetheramine” discloses that the epoxy resin and the epoxidized soybean oil are evenly mixed, and then cured with polyetheramine to obtain a toughened epoxy resin.

[0004] In these publicly available materials, epoxidized soybean oil is mostly used as a synergist for epoxy resins, and polyetheramine is used as a curing agent for epoxy resins. However, in the field of textile auxiliaries, there are few reports on the application of epoxidized soybean oil in polyester dyeing. Summary of the invention

[0005] In order to solve the above technical problems, the object of the present invention is to provide a method for preparing a low color change polyester high temperature leveling agent based on modified epoxidized soybean oil.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A low color change polyester high-temperature leveling agent based on modified epoxy soybean oil, the formula composition by weight is: 30-50 parts of polyetheramine modified epoxy soybean oil, 15-25 parts of cardanol polyoxyethylene ether, 5-10 parts of castor oil polyoxyethylene ether, 5-20 parts of solvent and 15-30 parts of deionized water.

[0007] As the preferred modified epoxidized soybean oil, its preparation includes the following synthesis method and steps, which are proportioned by mass: 80 to 110 parts of epoxidized soybean oil and 180 to 350 parts of single-end polyether amine are added to a reaction container, the temperature is raised to 90°C to 120°C, and after the reaction is kept warm for 4 to 6 hours, the temperature is lowered to below 50°C and the material is discharged.

[0008] The reaction formula is as follows:

[0009] in, , a≥1, b≥1, and a and b are both positive integers; Preferably, the average number of polyoxyethylene repeating units in the molecular structure of the cashew phenol oxyethylene ether is 5 to 10; the average number of polyoxyethylene repeating units in the molecular structure of the castor oil polyoxyethylene ether is 10 to 40; the solvent is one of ethanol, ethylene glycol, and isopropanol; and the number average molecular weight of the single-ended polyether amine is 500 to 1500.

[0010] Due to the application of the above technical solution, the present invention has the following advantages: The modified product is made of epoxidized soybean oil, a natural oil ester derivative. The modified product not only has excellent dispersibility for disperse dyes, but also has a good emulsifying and dispersing effect on the spinning oil on the fabric. In addition, the epoxidized soybean oil has a certain plasticizing effect on polyester fibers, promoting the dyeing of the fibers. At the same time, bio-based cardanol polyoxyethylene ether and castor oil polyoxyethylene ether are compounded for synergistic effect, thereby improving the dispersibility and migration of dyes, so that the dyed fabric has uniform color and low color change. DETAILED DESCRIPTION

[0011] The present invention is further described in detail below in conjunction with specific embodiments. Example

[0012] 100 g of epoxy soybean oil and 180 g of a single-end polyetheramine with a number average molecular weight of 600 were added to a reaction container, the temperature was raised to 95° C., and after the reaction was kept at this temperature for 5 hours, the temperature was lowered to below 50° C. to obtain modified epoxy soybean oil.

[0013] 40g of polyetheramine-modified epoxy soybean oil, 15g of cardanol polyoxyethylene ether with an average polyoxyethylene repeating unit number of 7, 5g of castor oil polyoxyethylene ether with an average polyoxyethylene repeating unit number of 20, 10g of isopropanol and 30g of deionized water are put into a reaction container, stirred evenly and then discharged to obtain a low color change polyester high-temperature leveling agent. Example

[0014] 100 g of epoxy soybean oil and 300 g of a single-end polyetheramine with a number average molecular weight of 1000 were added to a reaction container, the temperature was raised to 110° C., and after keeping the temperature for reaction for 6 hours, the temperature was lowered to below 50° C. to obtain modified epoxy soybean oil.

[0015] 35g of polyetheramine-modified epoxy soybean oil, 20g of cardanol polyoxyethylene ether with an average polyoxyethylene repeating unit number of 5, 5g of castor oil polyoxyethylene ether with an average polyoxyethylene repeating unit number of 10, 12g of ethanol and 28g of deionized water are put into a reaction container, stirred evenly and then discharged to obtain a low color change polyester high-temperature leveling agent. Example

[0016] 100 g of epoxy soybean oil and 300 g of single-end polyetheramine with a number average molecular weight of 1000 were added to a reaction container, the temperature was raised to 120° C., and after the reaction was kept at this temperature for 5 hours, the temperature was lowered to below 50° C. to obtain modified epoxy soybean oil.

[0017] 30g of polyetheramine-modified epoxy soybean oil, 20g of cardanol polyoxyethylene ether with an average polyoxyethylene repeating unit number of 5, 10g of castor oil polyoxyethylene ether with an average polyoxyethylene repeating unit number of 10, 15g of ethanol and 25g of deionized water are put into a reaction container, stirred evenly and then discharged to obtain a low color change polyester high-temperature leveling agent.

[0018] Application Testing Fabric: 75D polyester knitted fabric Comparative example: High temperature leveling agent M-219B (commercial product of Hangzhou Meigao Huayi Chemical Co., Ltd.) (3) Test method 1) Dye dispersion test: refer to the standard GB / T 5540-2007 "Determination of dispersion properties of disperse dyes - Double filter paper filtration method" for determination.

[0019] 2) Dye migration test: Tested in accordance with standard HG / T 4263-2011 “Determination of Dye Migration Performance of Leveling Agents for Textile Dyeing and Finishing Auxiliary Polyesters”.

[0020] 3) Emulsification test: Test according to the method of standard HG / T 5668-2019 "Determination of the emulsification effect of degreasing agents for textile dyeing and finishing auxiliaries".

[0021] 4) Color fastness test: The color fastness to washing with soap is determined according to the standard GB / T 3921-2008 “Textiles - Tests for Color Fastness - Color Fastness to Washing with Soap”.

[0022] The color fastness to rubbing is determined according to the standard GB / T 3920-2008 “Textiles - Tests for Color Fastness - Color Fastness to Rubbing”.

[0023] 5) Color change test: Use a colorimeter to test the apparent color depth K / S value of the dyed fabric, and use the ∆E value to determine the color change.

[0024] Application test results Table 1 Application test results

[0025] It can be seen from the above data that the embodiments of the present invention have some improvement in dye dispersibility and migration compared with the comparative example, and have obvious improvement in emulsification and color change, and have no obvious effect on the color fastness of the dyed fabric; 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 with the contents disclosed in the present invention should be considered as the protection scope of the present invention.

Claims

1. A method for preparing a low color change polyester high temperature leveling agent based on modified epoxy soybean oil, characterized in that: The formula composition by mass is: 30-50 parts of polyetheramine modified epoxy soybean oil, 15-25 parts of cardanol polyoxyethylene ether, 5-10 parts of castor oil polyoxyethylene ether, 5-20 parts of solvent and 15-30 parts of deionized water.

2. The low color change polyester high temperature leveling agent based on modified epoxy soybean oil according to claim 1, characterized in that The preparation of the modified epoxidized soybean oil includes the following synthesis method and steps, which are proportioned by mass: Add 80-110 parts of epoxidized soybean oil and 180-350 parts of single-end polyetheramine into a reaction container, raise the temperature to 90°C-120°C, keep the temperature for reaction for 4-6 hours, then cool down to below 50°C and discharge.

3. The method for preparing a low color change polyester high temperature leveling agent based on modified epoxidized soybean oil according to claim 1, characterized in that The average number of polyoxyethylene repeating units in the molecular structure of the cashew phenol oxyethylene ether is 5 to 10, the average number of polyoxyethylene repeating units in the molecular structure of the castor oil polyoxyethylene ether is 10 to 40, and the solvent is one of ethanol, ethylene glycol, and isopropanol.

4. The low color change polyester high temperature leveling agent based on modified epoxidized soybean oil according to claim 2, characterized in that The number average molecular weight of the single-ended polyetheramine is 600-1500.

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