High-stiffness and high-elasticity modified organic silicon as well as preparation method and application thereof
By introducing terephthalic acid and hexamethylenediamine amidation units into the polysiloxane backbone, the shortcomings of traditional silicone finishing agents, such as softness and stiffness, are solved, achieving a combination of fabric stiffness, softness and high elasticity, with excellent durability and environmental friendliness.
Patent Information
- Application Number
- CN202511493059.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-20
- Publication Date
- 2026-01-06
AI Technical Summary
Traditional silicone finishing agents have problems such as being soft, lacking structure and stiffness in textile fabrics, while existing stiffening agents have disadvantages such as formaldehyde release, stiff hand feel, poor elasticity recovery and poor washability.
By introducing rigid segments of terephthalic acid and hexamethylenediamine amidation units onto a flexible polysiloxane backbone, and combining them with the reaction of terminal aminopropyl polysiloxane and polyetheramine, highly elastic modified organosilicon is prepared, providing high elasticity and rigidity support and soft and smooth chain segments, forming chemical bonds and physical adsorption to firmly bond with fibers.
It achieves a combination of crispness and high elasticity in the fabric, with a smooth feel, excellent durability, and good resistance to washing and dry cleaning, thus solving the environmental and durability problems of traditional finishing agents.
Smart Images
Figure CN121270933A_ABST
Abstract
Description
Technical Field
[0002] This invention relates to the field of dyeing and finishing technology, and in particular to a high-strength and elastic modified organosilicon, its preparation method, and its application. Background Technology
[0003] Organosilicon finishing agents are widely used in the finishing processes of textile fabrics due to their soft and smooth feel. Traditional amino silicone oils can provide excellent softness, but the fabrics treated with them often have problems such as being limp, lacking structure, and lacking crispness, making it difficult to meet the requirements of garments with high shaping requirements (such as suits, shirts, or coats).
[0004] To improve the stiffness of fabrics, technicians often combine silicone finishing agents with resin finishing agents (such as 2D resin), or use acrylic stiffeners. However, these methods have many drawbacks: resin finishing agents release formaldehyde, which is harmful to human health and the environment; acrylic stiffeners can cause the fabric to feel stiff and rough, with poor elasticity and poor washability.
[0005] Therefore, how to develop an environmentally friendly textile finishing agent that combines softness, smoothness, and high elasticity has become a technical problem that urgently needs to be solved in this field. Summary of the Invention
[0006] In view of this, the present invention provides a high-elasticity modified organosilicon, its preparation method and application. The high-elasticity modified organosilicon provided by the present invention combines softness, smoothness and high elasticity, and is environmentally friendly and formaldehyde-free.
[0007] This invention provides a highly elastic modified organosilicon with the structure shown in Formula I: ; In Formula I, a is 1~10, b is 0~40, c is 1~50, m is 2~100, and n is 20~70.
[0008] This invention also provides a method for preparing the high-elasticity modified organosilicon described above, comprising the following steps: (1) A first amidation reaction was carried out by mixing amino-terminated propyl polysiloxane, diethyl terephthalate and a portion of the catalyst to obtain a siloxane prepolymer; the structure of the amino-terminated propyl polysiloxane is shown in Formula II: Formula II; In Equation II, n is 20~70; The structure of the siloxane prepolymer is shown in Formula III: Formula III; In Formula III, m is 2~100 and n is 20~70; (2) The siloxane prepolymer is mixed with polyetheramine, hexamethylenediamine and the remaining catalyst to carry out a second amidation reaction to obtain the high stiffness modified organosilicon.
[0009] Preferably, the preparation method of the terminal aminopropyl polysiloxane includes the following steps: mixing 1,3-bis(3-aminopropyl)1,1,3,3-tetramethyldisiloxane, octamethylcyclotetrasiloxane and an organic catalyst to carry out a polymerization reaction.
[0010] Preferably, the polymerization reaction is carried out in a protective atmosphere; the polymerization reaction includes a first polymerization reaction and a second polymerization reaction; the temperature of the first polymerization reaction is 80~110℃, and the holding time is 8~48 hours; the temperature of the second polymerization reaction is 135~155℃, and the holding time is 2~5 hours.
[0011] Preferably, the mass ratio of the terminal aminopropyl polysiloxane to diethyl terephthalate is 100:4~27; and the mass ratio of the terminal aminopropyl polysiloxane to part of the catalyst is 100:0.06~0.6.
[0012] Preferably, the first amidation reaction is carried out in a protective atmosphere; the temperature of the first amidation reaction is 120~160℃, and the holding time is 2~4 hours.
[0013] Preferably, the polyetheramine is a polypropylene oxide-ethylene oxide block copolymer diamine.
[0014] Preferably, the mass ratio of the terminal aminopropyl polysiloxane to the polyetheramine is 100:10~40; the mass ratio of the terminal aminopropyl polysiloxane to hexamethylenediamine is 100:2~10; and the mass ratio of the terminal aminopropyl polysiloxane to the remaining catalyst is 100:0.04~0.4.
[0015] Preferably, the second amidation reaction is carried out in a protective atmosphere; the temperature of the second amidation reaction is 120~160℃, and the holding time is 3~5 hours.
[0016] The present invention also provides the application of the high-elasticity modified organosilicon described in the above-described scheme or the high-elasticity modified organosilicon obtained by the preparation method described in the above-described scheme as a fabric finishing agent.
[0017] This invention provides a high-strength, elastic modified silicone. Through molecular design, it introduces rigid segments of terephthalic acid and hexamethylenediamine amidation units onto a flexible polysiloxane backbone as a "molecular skeleton," providing high-elasticity and stiff support, giving the fabric a crisp feel, and resulting in excellent deformation recovery, wrinkle resistance, and shape retention. This invention uses terminal aminopropyl polysiloxane as soft, smooth segments; the soft polysiloxane and polyether segments ensure the fabric's softness, smoothness, and toughness, overcoming the drawback of acrylic stiffening agents that result in a stiff feel. Simultaneously, this invention utilizes terephthalic acid and polyetheramine amidation to provide emulsification, dispersibility, and water solubility. This invention firmly binds to fibers through chemical bonds and physical adsorption, resulting in good durability and excellent resistance to washing and dry cleaning. Therefore, the high-strength, elastic modified silicone provided by this invention can simultaneously impart a lasting crispness and excellent elasticity to the fabric, achieving a balance of softness and stiffness, excellent durability, and a smooth, full hand feel. It combines softness, smoothness, and high elasticity in one, and is environmentally friendly and formaldehyde-free.
[0018] This invention also provides a method for preparing the highly elastic modified organosilicon described above. The preparation method provided by this invention has simple steps, does not require complex process conditions, is safe and environmentally friendly (formaldehyde-free), and reduces product costs and energy consumption.
[0019] This invention also provides the application of the high-stiffness and elasticity modified organosilicon described in the above-described scheme or the high-stiffness and elasticity modified organosilicon obtained by the preparation method described in the above-described scheme as a fabric finishing agent. The high-stiffness and elasticity modified organosilicon provided by this invention is suitable for high-grade finishing of various fabrics such as cotton, polyester, nylon or blended fabrics. It can be used directly or compounded with other auxiliaries. It can be applied to fabrics through a padding-baking process, making it convenient to use. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0021] Figure 1 This is a chemical reaction route diagram involving the polymerization reaction in this invention; Figure 2 This is a chemical reaction route diagram involving the first amidation reaction in this invention; Figure 3 This is a chemical reaction route diagram involving the second amidation reaction in this invention. Detailed Implementation
[0022] This invention provides a highly elastic modified organosilicon with the structure shown in Formula I: ; In Formula I, a is 1~10, b is 0~40, c is 1~50, m is 2~100, and n is 20~70.
[0023] This invention also provides a method for preparing the high-elasticity modified organosilicon described above, comprising the following steps: (1) A first amidation reaction was carried out by mixing amino-terminated propyl polysiloxane, diethyl terephthalate and a portion of the catalyst to obtain a siloxane prepolymer; the structure of the amino-terminated propyl polysiloxane is shown in Formula II: Formula II; In Equation II, n is 20~70; The structure of the siloxane prepolymer is shown in Formula III: Formula III; In Formula III, m is 2~100 and n is 20~70; (2) The siloxane prepolymer is mixed with polyetheramine, hexamethylenediamine and the remaining catalyst to carry out a second amidation reaction to obtain the high stiffness modified organosilicon.
[0024] This invention involves mixing terminal aminopropyl polysiloxane, diethyl terephthalate, and a portion of a catalyst (denoted as the first mixture) to undergo a first amidation reaction to obtain a siloxane prepolymer. In this invention, the weight-average molecular weight of the terminal aminopropyl polysiloxane is preferably 2000-5000, more preferably 3500-4000; the amine value of the terminal aminopropyl polysiloxane is preferably 22.4-56 mgKOH / g, more preferably 30-40 mgKOH / g.
[0025] In this invention, the method for preparing the terminal aminopropyl polysiloxane preferably includes the following steps: mixing 1,3-bis(3-aminopropyl)1,1,3,3-tetramethyldisiloxane, octamethylcyclotetrasiloxane and an organic catalyst to carry out a polymerization reaction.
[0026] In this invention, the mass ratio of 1,3-bis(3-aminopropyl)1,1,3,3-tetramethyldisiloxane and octamethylcyclotetrasiloxane is preferably 4.5~11.3:88.7~95.5, more preferably 7~9:90~93.
[0027] In this invention, the organic catalyst is preferably tetramethylammonium hydroxide.
[0028] In this invention, the mass ratio of 1,3-bis(3-aminopropyl)1,1,3,3-tetramethyldisiloxane to the organic catalyst is preferably 4.5~11.3:0.1~0.2, more preferably 7~9:0.15.
[0029] In this invention, the polymerization reaction is preferably carried out in a protective atmosphere; the protective atmosphere is preferably nitrogen; the polymerization reaction preferably includes a first polymerization reaction and a second polymerization reaction; the temperature of the first polymerization reaction is preferably 80~110℃, more preferably 90~100℃, and the holding time is preferably 8~48 hours, more preferably 18~28 hours; the temperature of the second polymerization reaction is preferably 135~155℃, more preferably 140~150℃, and the holding time is preferably 2~5 hours, more preferably 3~4 hours. The synthetic route for terminal aminopropyl polysiloxane is as follows: Figure 1 As shown.
[0030] In this invention, the polymerization reaction preferably includes impurity removal from the resulting product system; the impurity removal temperature is preferably 140~160℃, more preferably 150℃, and the vacuum degree is preferably -0.100~-0.095MPa, more preferably -0.097MPa. This invention removes unreacted raw materials such as octamethylcyclotetrasiloxane through impurity removal.
[0031] In this invention, the mass ratio of the terminal aminopropyl polysiloxane to diethyl terephthalate is preferably 100:4~27, more preferably 100:8~20, and even more preferably 100:12~16.
[0032] In this invention, the catalyst preferably includes one or more of titanate catalysts, zinc acetate, and stannous octoate; the titanate catalyst is preferably tetraisopropyl titanate.
[0033] In this invention, the mass ratio of the terminal aminopropyl polysiloxane to part of the catalyst is preferably 100:0.06~0.6, more preferably 100:0.1~0.3.
[0034] In this invention, the first mixing is preferably carried out in a protective atmosphere; the protective atmosphere is preferably nitrogen.
[0035] In this invention, the first amidation reaction is preferably carried out in a protective atmosphere; the protective atmosphere is preferably nitrogen; the temperature of the first amidation reaction is preferably 120~160℃, more preferably 130~150℃, and the holding time is preferably 2~4 hours, more preferably 3 hours. During the first amidation reaction, the ester group of diethyl terephthalate reacts with the amino group at the end of the aminopropyl polysiloxane to form an amide bond, thereby introducing a rigid benzene ring structure into the segment of the aminopropyl polysiloxane, generating a siloxane prepolymer with an aromatic ring structure. The specific reaction route involved is as follows: Figure 2 As shown.
[0036] After obtaining the siloxane prepolymer, the present invention mixes the siloxane prepolymer with a polyetheramine, hexamethylenediamine, and the remaining catalyst (denoted as the second mixture) to carry out a second amidation reaction to obtain the highly elastic modified organosilicon. In the present invention, the polyetheramine is preferably a polypropylene oxide-ethylene oxide block copolymer diamine; the weight-average molecular weight of the polyetheramine is preferably 400-900, more preferably 600. In a specific embodiment of the present invention, the polyetheramine can be polyetheramine D-400, polyetheramine ED600, or polyetheramine ED900.
[0037] In this invention, the mass ratio of the terminal aminopropyl polysiloxane to the polyetheramine is preferably 100:10~40, more preferably 100:20~30.
[0038] In this invention, the mass ratio of the terminal aminopropyl polysiloxane to hexamethylenediamine is preferably 100:2~10, more preferably 100:4~7.
[0039] In this invention, the mass ratio of the terminal aminopropyl polysiloxane to the remaining catalyst is preferably 100:0.04~0.4, more preferably 100:0.1~0.2.
[0040] In this invention, the temperature of the second mixing is preferably 80~100℃, more preferably 90℃.
[0041] In this invention, the second amidation reaction is preferably carried out in a protective atmosphere; the protective atmosphere is preferably nitrogen; the temperature of the second amidation reaction is preferably 120~160℃, more preferably 130~150℃, and the holding time is preferably 3~5 hours, more preferably 4 hours. During the second amidation reaction, the polyetheramine and hexamethylenediamine further amidate the ester groups at the ends of the siloxane prepolymer, introducing flexible polyether segments and improving the hydrophilicity and water solubility of the high-elasticity modified silicone; hexamethylenediamine, as a bifunctional crosslinking agent, reacts with multiple siloxane prepolymer molecules to form a high-elasticity and stiff structure, which is the key to the high-elasticity modified silicone imparting high elasticity and durable stiffness to the fabric. The specific reaction routes involved are as follows: Figure 3 As shown.
[0042] In this invention, the second amidation reaction preferably further includes cooling and diluting the resulting reaction product; the endpoint temperature of the cooling is preferably below 80°C; the diluent used for dilution is preferably glacial acetic acid and a mixed solvent; the mass ratio of the glacial acetic acid to the mixed solvent is preferably 2:200~285, more preferably 2:230~265; the mixed solvent is preferably a mixed solvent of alcohol, isomeric alcohol polyoxyethylene ether, and water; the alcohol is preferably ethanol or isopropanol; the isomeric alcohol polyoxyethylene ether is preferably dodecyl isomeric alcohol polyoxyethylene ether; the mass ratio of the alcohol to water is preferably 65:100~185, more preferably 65:130~165; the mass ratio of the isomeric alcohol polyoxyethylene ether to water is preferably 35:100~185, more preferably 35:130~155; the target solid content of the dilution is preferably 20~40%, more preferably 30%.
[0043] The present invention also provides the application of the high-elasticity modified organosilicon described in the above-described scheme or the high-elasticity modified organosilicon obtained by the preparation method described in the above-described scheme as a fabric finishing agent.
[0044] The high-strength and elastic modified organosilicon provided by this invention is suitable for high-end finishing of various fabrics such as cotton, polyester, nylon or blended fabrics. It can be used directly or compounded with other auxiliaries. It can be applied to fabrics through padding-baking process, which is convenient to use.
[0045] To further illustrate the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0046] Example 1 This embodiment prepares a highly elastic modified organosilicon, and the specific steps are as follows: (1) Preparation of terminal aminopropyl polysiloxane: Nitrogen gas was introduced into a four-necked flask equipped with a condenser and a stirrer, and 13.5 g of 1,3-bis(3-aminopropyl)1,1,3,3-tetramethyldisiloxane, 286.5 g of octamethylcyclotetrasiloxane, and 0.4 g of tetramethylammonium hydroxide were added. The mixture was kept at 100 °C for 9 hours, and then heated to 140 °C for 3 hours. Unreacted octamethylcyclotetrasiloxane and its analogues were removed under conditions of -0.1~-0.095 MPa and 140~160 °C. The mixture was then cooled and discharged to obtain terminal aminopropyl polysiloxane with a weight average molecular weight of 5000.
[0047] (2) Feeding: In a four-necked flask equipped with a water separator, condenser and stirrer, nitrogen gas is introduced, and 100 g of terminal aminopropyl polysiloxane (amine value 22.4, weight average molecular weight 5000), 10 g of diethyl terephthalate and 0.3 g of tetraisopropyl titanate are added.
[0048] (3) Second step reaction: Heat to 140℃ and react for 3 hours to separate the ethanol produced in the reaction.
[0049] (4) Third step reaction: Cool down to 90°C, add 10 g of polyetheramine (D-400, weight average molecular weight of 400), 3 g of hexamethylenediamine and 0.2 g of tetraisopropyl titanate, and continue the reaction at 140°C for 4 hours.
[0050] (5) Dilution: Cool to 70°C, add 35g dodecyl isomeric alcohol polyoxyethylene ether, 65g ethanol, 2.0g glacial acetic acid and 100g water, stir evenly to obtain a slightly yellow semi-transparent liquid product with a solid content of 35%, which is the high stiffness and elasticity modified organosilicon.
[0051] Example 2 This embodiment prepares a highly elastic modified organosilicon, and the specific steps are as follows: (1) Preparation of terminal aminopropyl polysiloxane: Nitrogen gas was introduced into a four-necked flask equipped with a condenser and a stirrer, and 13.5 g of 1,3-bis(3-aminopropyl)1,1,3,3-tetramethyldisiloxane, 286.5 g of octamethylcyclotetrasiloxane, and 0.4 g of tetramethylammonium hydroxide were added. The mixture was kept at 100 °C for 9 hours, and then heated to 140 °C for 3 hours. Unreacted octamethylcyclotetrasiloxane and its analogues were removed under conditions of -0.1~-0.095 MPa and 140~160 °C. The mixture was then cooled and discharged to obtain terminal aminopropyl polysiloxane with a weight average molecular weight of 5000.
[0052] (2) Feeding: In a four-necked flask equipped with a water separator, condenser and stirrer, nitrogen gas is introduced, and 100 g of terminal aminopropyl polysiloxane (amine value 22.4, weight average molecular weight 5000), 15 g of diethyl terephthalate and 0.3 g of tetraisopropyl titanate are added.
[0053] (3) Second step reaction: Heat to 140℃ and react for 3 hours to separate the ethanol produced in the reaction.
[0054] (4) Third step reaction: Cool down to 90°C, add 15 g of polyetheramine (ED600, weight average molecular weight of 600), 2 g of hexamethylenediamine and 0.2 g of tetraisopropyl titanate, and continue the reaction at 140°C for 4 hours.
[0055] (5) Dilution: Cool to 70°C, add 35g dodecyl isomeric alcohol polyoxyethylene ether, 65g ethanol, 2.0g glacial acetic acid and 145g water, stir evenly to obtain a slightly yellow transparent liquid product with a solid content of 35%, which is the high stiffness and elasticity modified organosilicon.
[0056] Example 3 This embodiment prepares a highly elastic modified organosilicon, and the specific steps are as follows: (1) Preparation of terminal aminopropyl polysiloxane: Nitrogen gas was introduced into a four-necked flask equipped with a condenser and a stirrer, and 33.9 g of 1,3-bis(3-aminopropyl)1,1,3,3-tetramethyldisiloxane, 266.1 g of octamethylcyclotetrasiloxane, and 0.6 g of tetramethylammonium hydroxide were added. The mixture was kept at 100 °C for 9 hours, and then heated to 140 °C for 3 hours. Unreacted octamethylcyclotetrasiloxane and its analogues were removed under conditions of -0.1~-0.095 MPa and 140~160 °C. The mixture was then cooled and discharged to obtain terminal aminopropyl polysiloxane with a weight average molecular weight of 2000.
[0057] (2) Feeding: In a four-necked flask equipped with a water separator, condenser and stirrer, nitrogen gas is introduced, and 100 g of terminal aminopropyl polysiloxane (amine value 56, weight average molecular weight 2000), 25 g of diethyl terephthalate and 0.3 g of tetraisopropyl titanate are added.
[0058] (3) Second step reaction: Heat to 140℃ and react for 3 hours to separate the ethanol produced in the reaction.
[0059] (4) Third step reaction: Cool down to 90°C, add 25 g of polyetheramine (ED900, weight average molecular weight of 900), 5 g of hexamethylenediamine and 0.2 g of tetraisopropyl titanate, and continue the reaction at 140°C for 4 hours.
[0060] (5) Dilution: Cool down to 70°C, add 35g of dodecyl isomeric alcohol polyoxyethylene ether, 65g of ethanol, 2g of glacial acetic acid and 185g of water, stir evenly to obtain a slightly yellow transparent liquid product with a solid content of 35%, which is the high stiffness and elasticity modified organosilicon.
[0061] Test Example 1 The hand feel and resilience of the high-elasticity modified silicone prepared in Examples 1-3 were tested. Commercially available ordinary silicone oil and commercially available elastic finishing agent were used as control groups, and a blank control group was set up. The test method was as follows: T / R Roma fabric was used as the experimental material. The solid content of the emulsion products was 20wt%, and the dosage was 50g / L. The process involved one dip and one roll → drying (100℃) → setting (170℃, 60 seconds) → rehydration for 4 hours. The resilience was tested according to GB / T3819-1997. The hand feel was compared, and the results are shown in Tables 1 and 2.
[0062] Table 1. Hand feel test results of high-elasticity modified silicone in Examples 1-3
[0063] Note: 5 is the best in terms of feel, and 1 is the worst.
[0064] Table 2. Resilience test results of high-elasticity modified organosilicon in Examples 1-3
[0065] As can be seen from Tables 1-2, the high-elasticity modified organosilicon provided by this invention is excellent in terms of fluffiness, softness and resilience, with a superior overall feel and good resilience performance, and outstanding overall performance.
[0066] Test Example 2 Washability tests were conducted on the high-elasticity modified silicone prepared in Examples 1-3. Commercially available ordinary silicone oil and commercially available elastic finishing agent were used as control groups, and a blank control group was set up.
[0067] The test method was as follows: The softened polyester T / R Roma fabric was placed in a 2g / L laundry detergent solution with a liquor ratio of 1:50 and washed in a washing machine for 10 minutes at a time. After washing, it was rinsed with clean water, dried, and the hand feel was compared after it regained moisture. The results are shown in Table 3.
[0068] Table 3. Washability test results of high-elasticity modified silicones in Examples 1-3
[0069] Note: This is a comprehensive evaluation of the feel, with 5 being the best for softness and 1 being the worst.
[0070] As can be seen from Table 3, the high-elasticity modified organosilicon provided by the present invention can significantly improve the overall stiffness and elasticity of the fabric, and its performance is durable, and it also significantly improves the resilience of the fabric.
[0071] The embodiments of the present invention have been described above; however, these embodiments are merely illustrative and not intended to limit the scope of the invention. Although various embodiments have been described above, this does not mean that the measures in the embodiments cannot be used advantageously in combination. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of the invention, and all such substitutions and modifications should fall within the scope of the invention.
Claims
1. A high-stiffness-modified silicone characterized by, The structure is shown as formula I: ； In formula I, a is 1-10, b is 0-40, c is 1-50, m is 2-100, and n is 20-70.
2. The method of making a high-crimp-modified silicone of claim 1, characterized in that, The method comprises the following steps: (1) mixing the amino-propyl-terminated polysiloxane, diethyl terephthalate and part of the catalyst to perform a first amidation reaction to obtain a siloxane prepolymer; The structure of the amino-propyl-terminated polysiloxane is shown as formula II: Formula II; In formula II, n is 20-70; The structure of the siloxane prepolymer is shown as formula III: Formula III; In formula III, m is 2-100, and n is 20-70; (2) mixing the siloxane prepolymer, polyether amine, hexanediamine and the remaining catalyst to perform a second amidation reaction to obtain the high-stretch modified silicone.
3. The preparation method according to claim 2, characterized in that, The preparation method of the amino-propyl-terminated polysiloxane comprises the following steps: Mixing 1,3-bis(3-aminopropyl) 1,1,3,3-tetramethyldisiloxane, octamethylcyclotetrasiloxane and an organic catalyst to perform a polymerization reaction.
4. The production method according to claim 3, characterized by, The polymerization reaction is performed in a protective atmosphere; The polymerization reaction comprises a first polymerization reaction and a second polymerization reaction; The temperature of the first polymerization reaction is 80-110°C, and the holding time is 8-48 hours; The temperature of the second polymerization reaction is 135-155°C, and the holding time is 2-5 hours.
5. The preparation method according to claim 2, characterized in that, The mass ratio of the amino-propyl-terminated polysiloxane and diethyl terephthalate is 100:4-27; The mass ratio of the amino-propyl-terminated polysiloxane and part of the catalyst is 100:0.06-0.
6.
6. The production method according to claim 2 or 5, characterized by, The first amidation reaction is performed in a protective atmosphere; The temperature of the first amidation reaction is 120-160°C, and the holding time is 2-4 hours.
7. The preparation method according to claim 2, characterized in that, The polyether amine is a polyoxypropylene-ethylene oxide block copolymer diamine.
8. The production method according to claim 2 or 7, characterized by, The mass ratio of the amino-propyl-terminated polysiloxane and polyether amine is 100:10-40; The mass ratio of the amino-propyl-terminated polysiloxane and hexanediamine is 100:2-10; The mass ratio of the amino-propyl-terminated polysiloxane and the remaining catalyst is 100:0.04-0.
4.
9. The preparation method according to claim 2, characterized in that, The second amidation reaction is performed in a protective atmosphere; The temperature of the second amidation reaction is 120-160°C, and the holding time is 3-5 hours.
10. Use of the high-stretch modified silicone of claim 1 or the high-stretch modified silicone obtained by the preparation method of any one of claims 2-9 as a fabric finishing agent.