CN115198520A - Bio-based softening agent and preparation method and application thereof - Google Patents

Abstract

The present invention provides a bio-based softener and a preparation method and application thereof, wherein the preparation method comprises the steps of: mixing a bio-based organic acid, a catalyst and an organic amine, starting a dehydration reaction, and reacting to obtain an initial product; The glycol ether is added to the product to react to form a polymer; a quaternization reagent is added to the polymer to start the quaternization reaction; after the reaction, a bio-based emulsifier and a defoamer are added to obtain the bio-based softness agent. The softener prepared by the invention has good application effect, less yellowing of fabrics, good hydrophilic performance and antistatic performance, and meets market demands; at the same time, the raw materials and production process adopted by the bio-based softener of the invention are environmentally friendly, and the products are of high quality. Safer to use, renewable and environmentally friendly with high value.

Description

A kind of bio-based softener and its preparation method and application

technical field

The invention belongs to the technical field of textile auxiliaries, in particular to a bio-based softener and a preparation method and application thereof.

Background technique

With the continuous improvement of the quality of life, people have higher and higher requirements for the wearing comfort of clothing. In the processing or daily use of textiles, the hand feel will become rough after repeated processing and washing, and the general synthetic fiber fabric feels worse. . In order to make the fabric have a soft, smooth and comfortable feel, it needs to be finished. At present, it is widely used to finish with a softener. The use of softener can make the fiber itself have softness and smoothness suitable for processing conditions to avoid damage. Therefore, softener is an important finishing agent to improve product quality and increase the added value of products in textile printing and dyeing.

Cationic softener is the most widely used category, including quaternary ammonium salt type, silicone resin type, ester quaternary ammonium salt type, etc. In addition, the silicone softener with good hand feel contains siloxane ring body in the raw material, but it has certain safety risks during use, and at the same time causes certain difficulties in recycling during the use of printing and dyeing plants, so there is a need for Silicone-containing softeners with good hand feel; at the same time, common silicon-free softeners have poor biodegradability and serious yellowing. With the improvement of public awareness and environmental protection quality requirements, such products are gradually unable to meet the needs of social development. need.

At the same time, in recent years, with the enhancement of people's environmental protection awareness and the improvement of national environmental protection regulations, as well as the reduction of oil reserves and the price increase and environmental pollution caused by petroleum-based polymer materials, textile auxiliaries need to be more environmentally friendly. direction development.

SUMMARY OF THE INVENTION

In view of the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a bio-based softener and a preparation method and application thereof, aiming to solve the problems of the existing softener containing silicon, poor hand feeling, and unenvironmental protection.

The technical scheme adopted by the present invention for solving the above-mentioned technical problems is as follows:

A bio-based softener, the raw material for preparing the bio-based softener comprises a bio-based organic acid, a catalyst, an organic amine, a glycol ether, a quaternization reagent, a bio-based emulsifier and a defoamer;

Calculated based on the total mass of the raw materials of the bio-based softener as 100%, the mass percentage of each component is:

The bio-based organic acid is any one or any combination of C12-C18 saturated fatty acid, tall oil fatty acid, and refined tall oil.

The catalyst is any one or any combination of hypophosphorous acid and p-toluenesulfonic acid.

The organic amine is any one or any combination of diethylenetriamine, triethanolamine and N,N-bis(3-aminopropyl)methylamine.

The glycol ether is any one or any combination of dipropylene glycol methyl ether, polyethylene glycol PEG-600 and polytetramethylene ether glycol PTMEG-1000.

The quaternization reagent is any one or any combination of dimethyl carbonate, dimethyl sulfate, diethyl carbonate and diethyl sulfate.

The bio-based emulsifier is any one or any combination of cardanol polyoxyethylene ether NSS 1305, NSS 1305A, and NSS 1308 of Nexin Bio.

The defoamer is any one or any combination of polyoxypropyl polyoxyethyl glycerol ether and polyether modified polysiloxane.

A preparation method of a bio-based softener, comprising the following steps:

Step 1: Mix the bio-based organic acid, the catalyst and the organic amine, start the dehydration reaction, and react to obtain the initial product;

Step 2, add glycol ether to the initial product obtained in step 1, and react to generate polymer;

Step 3, adding quaternization reagent to the polymer obtained in step 2 to start quaternization reaction;

Step 4: After the quaternization reaction described in Step 3 is completed, a bio-based emulsifier and a defoamer are added to obtain the bio-based softener.

In the preparation method of the bio-based softener, the first step includes: firstly heating and melting the bio-based organic acid under an inert atmosphere, the temperature is 120-180° C., and the stirring speed is 20-40 rpm; after melting, a catalyst is added, and stirring is performed. Homogeneous; then add organic amine, heat up to 180-230 ° C to start dehydration reaction, the reaction time is 3-10 hours; continue to react under vacuum for 0.5-3 hours to obtain the initial product.

In the preparation method of the bio-based softener, the second step includes: firstly cooling to 90-120° C., stopping the vacuum, adding glycol ether in an inert atmosphere, and reacting for 0.5-3 hours to generate a polymer.

The preparation method of the bio-based softener, wherein step 3 includes: cooling to 70-90° C., slowly adding a quaternization reagent, controlling the feeding time to be 1-3 hours, turning on cooling water to control the reaction temperature, and after adding Continue to maintain the temperature for 1-3 hours.

The preparation method of the bio-based softener, wherein step 4 includes: cooling to 70-80°C, adding a bio-based emulsifier, and stirring evenly; cooling to 60-70°C, adding a defoaming agent, stirring evenly, and filtering to obtain the Bio-based softener.

Preferably, the saturated fatty acid is stearic acid.

Preferably, the tall oil fatty acid is any one or any combination of ALTAPYNE 1483 from American Ingevity Company, HARTALL FA-1 from Japan Harima Company and L1-C from Matsukawa Technology (Fujian) Co., Ltd.

Preferably, the quaternization reagent is dimethyl sulfate.

Preferably, in the first step, the dehydration reaction temperature is 180-200° C., and the reaction time is 3-5 hours.

An application of a bio-based softener, the bio-based softener of the present invention or the bio-based softener prepared by any method of the present invention is used in the finishing of textiles.

beneficial effect

(1) In the present invention, bio-based organic acid is used as the main body for the reaction, which greatly reduces the consumption of fossil raw materials and improves the biodegradability of the product and the added value of the product. First of all, the saturated fatty acid used is stearic acid, that is, octadecanoic acid, which is a kind of fatty acid that exists widely in nature. At present, the vast majority of domestic stearic acid enterprises import palm oil from abroad and hydrogenate it into The hardened oil is then hydrolyzed and distilled to make stearic acid, which is a natural source; secondly, the tall oil fatty acid used is derived from tall oil, and its processing and utilization are an important part of the circular economy, which involves the sustainable recycling of forest resources. The ecological environment has a greater linkage relationship, and has greater economic and social benefits. It is modified to make textile auxiliary raw materials with suitable performance. The low carbonization and recycling of such textile raw materials provide strong support for the green, low-carbon and sustainable development of the textile industry.

(2) The quaternization reaction is carried out in the preparation method of the present invention, which improves the hydrophilicity and permeability of the product; the bio-based emulsifier is used to improve the hydrophilicity and permeability of the product, and no toxic and harmful substances are produced, so as to avoid Increase sewage treatment pressure. When the bio-based softener prepared by the invention is used for textile finishing, it can effectively improve the hand feeling, softness, color fastness and anti-yellowing effect of the textile; at the same time, it can also form molecular channels on the textile, so that static electricity can be transferred quickly , thereby improving the antistatic properties of textiles.

(3) The present invention provides a bio-based softener and a preparation method and application thereof, wherein the preparation method comprises the steps of: mixing a bio-based organic acid, a catalyst and an organic amine, starting a dehydration reaction, and reacting to obtain an initial product; The initial product is added with glycol ether to react to form a polymer; a quaternization reagent is added to the polymer to start the quaternization reaction; after the reaction, a bio-based emulsifier and a defoamer are added to obtain the Bio-based softener. The softener prepared by the invention has good application effect, less yellowing of the fabric, good hydrophilic performance and antistatic performance, and meets market demands; meanwhile, the raw materials and production process adopted by the bio-based softener of the invention are environmentally friendly, and the product has a high quality. Safer to use, renewable and environmentally friendly with high value.

Description of drawings

Fig. 1 is a schematic flow chart of the preparation method of a bio-based softener of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention more clear and definite, the following examples are given to further describe the present invention in detail. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

A bio-based softener, the raw material for preparing the bio-based softener comprises a bio-based organic acid, a catalyst, an organic amine, a glycol ether, a quaternization reagent, a bio-based emulsifier and a defoamer;

Calculated based on the total mass of the raw materials of the bio-based softener as 100%, the mass percentage of each component is:

The flow chart of the preferred embodiment of the preparation method of a bio-based softener provided by the present invention, as shown in the figure, includes the following steps:

Step 1: Mix the bio-based organic acid, the catalyst and the organic amine, start the dehydration reaction, and react to obtain the initial product;

Step 2, adding glycol ether to the initial product, and reacting to generate a polymer;

Step 3, adding a quaternization reagent to the polymer to start the quaternization reaction;

Step 4: After the reaction is completed, a bio-based emulsifier and a defoamer are added to obtain the bio-based softener.

In this example, a long carbon chain ester amine is generated through the dehydration reaction of a bio-based organic acid and an organic amine, which ensures the softening performance of the prepared bio-based softener; the long carbon chain ester amine is further combined with a glycol ether. A further reaction occurs to generate a polymer with a hydrophilic segment structure, thereby enhancing the hydrophilic properties and antistatic properties of the polymer; finally, the polymer is mixed with a quaternization reagent, and a quaternization reaction occurs to generate an ester The base quaternary ammonium salt improves the stability and anti-yellowing effect of the product, and at the same time, its hydrophilicity is further improved.

In some embodiments, the bio-based organic acid is put into the reactor and the mixture is heated and melted at a temperature of 75-85°C. After it is completely melted, nitrogen gas is introduced, a catalyst is added, and the temperature is raised to 140°C. The organic amine was added dropwise to the reaction kettle. After the dropwise addition was completed, the temperature was raised to 186°C, and a dehydration reaction occurred. The reaction was performed at a constant temperature for 3.5 hours. A mixture of esters and diesters.

In this example, under the action of a catalyst, a bio-based organic acid and an organic amine are mixed, so that the carboxyl group of the bio-based organic acid and the amino or hydroxyl group on the organic amine undergo a dehydration reaction to synthesize a triester-free ester Ammonium avoids the adverse effects of triester compounds on softness, and the resulting long carbon chain structure can give textiles a soft hand. In this embodiment, the method of introducing nitrogen protection is adopted. By introducing nitrogen, the water produced by the dehydration reaction can be taken away, which is beneficial to the reaction. At the same time, due to the introduction of nitrogen, the raw materials can be prevented from being oxidized by air at high temperature. Thus ensuring the color of the product.

In some embodiments, the bio-based organic acid is any one or any combination of C12-C18 saturated fatty acids, tall oil fatty acids, and refined tall oil.

In some embodiments, the catalyst is any one or any combination of hypophosphorous acid and p-toluenesulfonic acid.

In some embodiments, the organic amine is any one or any combination of diethylenetriamine, triethanolamine and N,N-bis(3-aminopropyl)methylamine.

In some embodiments, the molar ratio of the bio-based organic acid to the organic amine is (1-3):1. Within this molar ratio range, the carboxyl group on the bio-based organic acid can undergo a dehydration reaction with a sufficient amount of the amino group or hydroxyl group on the organic amine to ensure that the synthetic product is a mixture of monoester and diester, which makes the subsequently generated ester group quaternary Ammonium salts are more active.

In some embodiments, glycol ether is added to the initial product, further condensed with the initial product, and reacted at a constant temperature to form a polymer. In this embodiment, the polymer has a polyether chain structure, which is a hydrophilic segment structure, which can enhance the hydrophilic properties of the polymer. The static electricity on the surface of the object is rapidly transferred to realize the antistatic effect of the textile.

In some embodiments, the glycol ether is any one or any combination of dipropylene glycol methyl ether, polyoxyethylene PEG-600 and polytetramethylene ether glycol PTMEG-1000. Adding it to the initial product can improve the water solubility of the initial product.

In some embodiments, the polymer is cooled to 75-80° C., a quaternization reagent is added, and a quaternization reaction is performed. The reaction is carried out for 1-3 hours. and antifoaming agent, after stirring evenly, filtering out the material to obtain the bio-based softener.

In this example, a quaternizing agent is added to the polymer, the hydrogen ion of the amino group on the polymer is replaced, and there is no hydrogen on the quaternary ammonium structure, forming a cationic surfactant, which can further improve the hydrophilicity and permeability of the textile. and the ester quaternary ammonium salt has good stability, good anti-yellowing performance and excellent biodegradability; finally, an emulsifier is added to improve the solubility and dispersibility of the product in water.

In some embodiments, the quaternizing agent is any one or any combination of dimethyl carbonate, dimethyl sulfate, diethyl carbonate and diethyl sulfate.

In some embodiments, the bio-based emulsifier is any one or any combination of Nexin's cardanol ethoxylates NSS 1305, NSS 1305A, and NSS 1308.

In some embodiments, the use of a bio-based softener in textile finishing is also provided. The bio-based softener prepared by the invention has an environment-friendly source, and can effectively improve the softness, anti-yellowing performance and antistatic performance of the fabric when it is used for textile finishing.

The present invention will be described in detail below through specific embodiments.

Example 1

Add 300g tall oil fatty acid and 284g stearic acid to the reaction kettle, turn on stirring and heating, the rotating speed is 20rpm, the temperature is controlled at 140°C for heating and melting, pass nitrogen, add 1.1g hypophosphorous acid 50%; be heated to about 140°C and add 103.2 g diethylenetriamine, start to heat up after the addition, adjust the rotation speed to 40-50rpm, when the temperature reaches 186±3°C, hold the temperature for 3.5 hours, turn off the nitrogen, vacuumize, and continue the reaction for 30 minutes; cool down to 100°C, Break the vacuum, pass nitrogen, add 195g dipropylene glycol methyl ether, react for 0.5 hour; cool to 80-85°C, slowly add 127g dimethyl sulfate, turn on the cooling coil, control the temperature not to exceed 90°C, and control the addition time to 1 hour After adding, control the temperature to 80℃ and react for 80 minutes; add 40g NSS 1305 and 50g NSS 1308, stir for 30 minutes until emulsification is uniform, cool down to 60-70℃, add 0.5g defoamer, stir evenly, filter and discharge while hot , that is, a bio-based softener is prepared.

Example 2

Add 300g tall oil fatty acid and 287g stearic acid to the reaction kettle, turn on stirring and heating, the rotating speed is 20rpm, the temperature is controlled at 140°C for heating and melting, nitrogen is passed through, 1.0g hypophosphorous acid 50% is added; the temperature is raised to about 140°C and 150.9 g triethanolamine, start to heat up after the addition, adjust the rotation speed to 40-50rpm, when the temperature reaches 190°C, hold the temperature for 3.5 hours, turn off nitrogen, vacuumize, and continue the reaction for 30 minutes; cool down to 100°C, break the vacuum, and pass Nitrogen, add 60g PEG-600, react for 1 hour; cool down to 70°C, slowly add 126.1g dimethyl sulfate, turn on the cooling coil, control the temperature not to exceed 90°C, and control the addition time to be about 1 hour, after adding, control temperature at 70°C for 80 minutes; add 40g of NSS 1305 and 50g of NSS1308, stir for 30 minutes until the emulsification is uniform, cool down to 60°C, add 0.5g of defoamer, stir evenly, filter and discharge while hot, and prepare a bio-based softener.

Example 3

Add 300g tall oil fatty acid, 287g stearic acid to the reaction kettle, turn on stirring and heating, the rotating speed is 20rpm, the temperature is controlled at 140°C for heating and melting, pass nitrogen, add 1.0g hypophosphorous acid 50%; be heated to about 140°C and add 146.8 gN, N-bis(3-aminopropyl) methylamine, after adding, the temperature rises, the rotating speed is adjusted to 40-50rpm, when the temperature reaches 190 ℃, the temperature is maintained for 3.5 hours, the nitrogen is turned off, the vacuum is applied, and the reaction is continued for 30 minutes; cool down to 100°C, break the vacuum, pass nitrogen, add 60g PTMEG-1000, and react for 1 hour; cool down to 70°C, slowly add 126.1g dimethyl sulfate, turn on the cooling coil, control the temperature not to exceed 90°C, and add time Control the temperature for about 1 hour, and control the temperature at 70°C to react for 80 minutes after the addition; add 40g NSS1305 and 50g NSS 1308, stir for 30 minutes until the emulsification is uniform, cool down to 60°C, add 0.5g defoamer, stir evenly, and filter while hot After discharging, a bio-based softener is prepared.

Example 4

Add 592g of tall oil fatty acid to the reaction kettle, turn on stirring and heating, the rotating speed is 20rpm, the temperature is controlled at 140°C for heating and melting, nitrogen is passed through, 1.1g hypophosphorous acid 50% is added; the temperature is raised to about 140°C, 149.2g triethanolamine is added, and After that, the temperature is raised, the rotation speed is adjusted to 40-50rpm, and when the temperature reaches 200±3°C, the temperature is maintained for 3 hours, the nitrogen is turned off, the vacuum is drawn, and the reaction is continued for 30 minutes; 60g PEG-600, react for 1 hour; cool down to 75-80°C, slowly add 66g dimethyl sulfate, turn on the cooling coil, control the temperature not to exceed 90°C, control the addition time to be about 1 hour, and control the temperature to 80°C after adding. ℃ react for 60 minutes; add 80g NSS 1305, 100g NSS 1308, stir for 30 minutes until emulsification is uniform, cool to 60-70°C, add 0.6g defoamer, stir evenly, filter and discharge while hot, that is, a biological Base softener.

Softener refers to a textile auxiliary that can adsorb on the surface of textile fibers and smooth the fibers to change the hand feel and make the product more comfortable. Soft finishing is an important finishing process in textile printing and dyeing. During the processing of textiles, the handle will become rough after multiple treatments. Generally, synthetic fiber fabrics are worse, especially microfiber fabrics. In order to make the fabrics have a soft, smooth and comfortable feel, they need to be finished. , At present, the most widely used is finishing with softener. In addition to the softness it brings to the fabric, the evaluation of the pros and cons of the softener also requires a comprehensive evaluation of product stability, influence on fabric shade, hydrophilic properties and antistatic properties.

The present invention will be further described below in conjunction with the comparative examples. The examples and comparative examples are only to help understand the present invention and should not be regarded as a specific limitation of the present invention.

Comparative Example 1

Commercially available softener D1821.

1. Physical property test

The physical properties of the bio-based softeners prepared in Examples 1-4 of the present invention are tested, and the results are shown in Table 1:

Table 1

It can be seen from Table 1 that the bio-based softener product prepared by the present invention is stable, high in content and good in safety. prospect.

Second, softener application performance test

The bio-based softeners prepared in the above Examples 1-4 were compared with Comparative Example 1 of softeners commonly used in the market.

The embodiment and the comparative example are respectively diluted with hot water to an emulsion with a softener content of 15%, and their softening properties, yellowing, hydrophilic properties and antistatic properties are tested:

1. Evaluation method of softness performance

The cotton woven fabric is treated by padding process: prepare 20g/L working solution→0.2MPa padding once→setting (150℃×90s)→moisture regain evaluation.

Hand feel evaluation: The two kinds of cloth samples were evaluated by hand touch method, and the hand feeling of the original cloth was rated as 1, and the best hand feeling evaluation was positioned as 5. More than 3 odd-numbered testers will evaluate and score, and take the average value. The larger the value, the better the hand feeling.

2. Evaluation method of whiteness and shade

Padding process: prepare 20g/L working solution→0.2MPa padding once→setting (150℃×90s)→test with Datacolor colorimeter. Compared with the untreated cloth sample for whiteness, the greater the whiteness change, the greater the yellowing.

3. Evaluation method of hydrophilic performance

The hydrophilic properties of cotton woven fabrics were tested, water droplets were dropped on the finished fabrics, and the time for the water droplets to spread completely on the fabrics was measured. The shorter the time, the better the hydrophilic properties.

4. Evaluation method of antistatic performance

Polyester woven fabric is used and treated by padding process: prepare 20g/L working solution → 0.2MPa padding once → setting (150℃×90s) → constant temperature and humidity for 30 minutes → measure the resistivity of the fabric with a surface resistance tester , the smaller the resistivity, the better the antistatic performance.

The application performance test results are shown in Table 2:

Table 2

softener Hand feel grade BaiDu Hydrophilic property(s) Resistivity original cloth 1 77.02 1-2 10⁹ Example 1 4 74.18 5 10⁹ Example 2 4 75.37 1-2 10⁸ Example 3 5 73.25 3 10⁹ Example 4 4 73.35 1-2 10⁸ Comparative Example 1 3-4 60.21 >60 >10¹²

It can be seen from Table 2 that after the fabric is treated with the biomass softener prepared by the present invention, it has excellent hand feeling, good whiteness, not easy to change color, and has good anti-yellowing effect. At the same time, the treated fabric also has excellent hydrophilic and antistatic properties.

To sum up, the present invention provides a bio-based softener and a preparation method thereof. First, a bio-based organic acid and an organic amine are dehydrated to generate long-chain ammonium esters with amino groups, which ensures the prepared bio-based softener. The softening performance of the agent; the long-chain ester ammonium with amino group further reacts with the glycol ether to generate a polymer with a hydrophilic segment structure, thereby enhancing the hydrophilic and antistatic properties of the polymer; The polymer is mixed with a quaternization reagent, and a quaternization reaction occurs to generate an ester quaternary ammonium salt, which improves the stability of the product and the anti-yellowing effect, and at the same time, its hydrophilicity is further improved. By adopting the preparation method of the present invention, a bio-based softener with good hydrophilic properties and soft properties, and good antistatic and anti-yellowing effects can be obtained, so as to improve the quality of textiles.

The applicant declares that the present invention illustrates the bio-based softener, preparation method and application of the present invention through the above-mentioned examples, but the present invention is not limited to the above-mentioned detailed method, that is, it does not mean that the present invention must rely on the above-mentioned detailed method to be implemented. Those skilled in the art should understand that any improvement of the present invention, the equivalent replacement of each raw material of the product of the present invention, the addition of auxiliary components, the selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims (9)

1. A bio-based softener, characterized by:

the raw materials of the bio-based softening agent comprise bio-based organic acid, a catalyst, organic amine, glycol ether, a quaternization agent, a bio-based emulsifier and a defoaming agent;

calculated by taking the total mass of the raw materials of the bio-based softening agent as 100 percent, the mass percentage of each component is as follows:

2. the bio-based softener according to claim 1, characterized in that:

the bio-based organic acid is any one or any combination of C12-C18 saturated fatty acid, tall oil fatty acid and refined tall oil;

the catalyst is any one or any combination of hypophosphorous acid and p-toluenesulfonic acid;

the organic amine is any one or any combination of diethylenetriamine, triethanolamine and N, N-bis (3-aminopropyl) methylamine;

the glycol ether is any one or any combination of dipropylene glycol methyl ether, polyethylene glycol PEG-600 and polytetramethylene ether glycol PTMEG-1000;

the quaternizing agent is any one or any combination of dimethyl carbonate, dimethyl sulfate, diethyl carbonate and diethyl sulfate;

the bio-based emulsifier is any one or any combination of anacardol polyoxyethylene ether NSS 1305, NSS 1305A and NSS1308 of the antibiotic-resistant organisms;

the defoaming agent is any one or any combination of polyoxypropylene polyoxyethylene glycerol ether and polyether modified polysiloxane.

3. The preparation method of the bio-based softening agent is characterized by comprising the following steps:

mixing bio-based organic acid, a catalyst and organic amine, starting a dehydration reaction, and reacting to obtain an initial product;

step two, adding glycol ether into the initial product obtained in the step one, and reacting to generate a polymer;

step three, adding a quaternizing agent into the polymer obtained in the step two, and starting quaternization reaction;

and step four, after the quaternization reaction in the step three is finished, adding a bio-based emulsifier and a defoaming agent to obtain the bio-based softening agent.

4. A method of preparing a bio-based softener according to claim 3, characterized in that:

the first step comprises the following steps: under the inert atmosphere, firstly heating and melting the bio-based organic acid, wherein the temperature is 120-180 ℃, and the stirring speed is 20-40rpm; adding a catalyst after melting, and uniformly stirring; then adding organic amine, heating to 180-230 ℃ to start dehydration reaction, wherein the reaction time is 3-10 hours; the reaction is continued for 0.5-3 hours under vacuum to obtain the initial product.

5. The method of preparing bio-based softener according to claim 3 or 4, characterized in that:

the second step comprises the following steps: cooling to 90-120 deg.c, vacuum stopping, adding glycol ether in inert atmosphere and reacting for 0.5-3 hr to produce polymer.

6. A method of preparing a bio-based softener according to claim 3, characterized in that:

the third step comprises: cooling to 70-90 ℃, slowly adding the quaternization agent, controlling the feeding time to be 1-3 hours, starting cooling water to control the reaction temperature, and continuing to react at the constant temperature for 1-3 hours after the addition is finished.

7. A method of preparing a bio-based softener according to claim 3, characterized in that:

the fourth step comprises: cooling to 70-80 deg.C, adding bio-based emulsifier, and stirring; and cooling to 60-70 ℃, adding a defoaming agent, uniformly stirring, and filtering to obtain the bio-based softening agent.

8. A bio-based softener, characterized in that it is prepared from the raw materials and the preparation method as claimed in any one of claims 1 to 7.

9. Use of a bio-based softener according to any one of claims 1 to 8 for finishing textiles.

Images