88 results about "Caprolactam" patented technology

The application belongs to the technical field of polymer material recycling, and particularly relates to a high-efficiency enzymatic hydrolysis process of polycaprolactam. The high-efficiency enzymatic hydrolysis process of polycaprolactam provided by the application comprises the steps of acid pretreatment, enzymatic catalytic depolymerization and product post-treatment. The process combines sulfuric acid and a multi-enzyme system to treat PA6 with high substrate concentration. The physical form and chemical accessibility of PA6 are significantly changed through sulfuric acid pretreatment, which creates conditions for subsequent enzymatic hydrolysis reaction, and realizes efficient, deep and green degradation of PA6.

The present invention provides a solid dispersion of compound 1 or a pharmaceutical salt thereof, comprising the compound 1 or the pharmaceutical salt thereof as an active ingredient and a carrier material, wherein the carrier material is selected from one, two, or more of polyvinylpyrrolidone (PVP), copovidone, polyvinylpyrrolidone-vinyl acetate copolymer, hydroxypropyl methylcellulose acetate succinate, polyvinyl caprolactam-polyvinyl acetate-polyethylene glycol graft copolymer, hydroxypropyl methylcellulose, polyethylene glycol, and ethyl cellulose, enabling the drug to have good stability, dissolution, and therapeutic effects. The formulation of the present invention provides rapid drug release and can reduce the oral burden of large-dose tablets on menopausal patients, thereby improving treatment compliance and treatment efficiency.

This invention relates to compositions and methods for cleaning and peeling. This disclosure provides a composition for cleaning or peeling materials from a substrate. The composition includes a primary solvent and a co-solvent. The co-solvent includes one or more caprolactam-derived solvents.

This invention discloses a method for preparing a three-dimensional integrated lumbar support cushion. The raw materials of the lumbar support cushion include: ethylene-vinyl acetate copolymer, polyether-type thermoplastic polyurethane elastomer, physically foamed microspheres, azodicarbonamide, caprolactam-blocked 4,4'-diphenylmethane diisocyanate, surface-modified copper nanowires, and silver-loaded silicone composite components. The preparation process is as follows: the matrix resin and modified copper nanowires are melt-blended at high temperature, and then mixed with the foaming system, crosslinking agent, and composite components at low temperature to obtain a blended base material; the blended base material is injection molded, followed by static differential temperature field for pressure holding and curing, and finally cooled and demolded. This invention utilizes copper nanowires to construct a thermally conductive network, which, combined with the external temperature difference, forms a continuous foaming ratio and crosslinking density gradient inside, eliminating the physical phase interface of traditional multi-material splicing, significantly improving the tear resistance and fatigue life of the transition zone; and utilizes cooling phase separation to form an anti-slip and antibacterial skin layer.

The utility model provides a kind of system for separating catalyst in caprolactam ammonox reaction turbidity, including catalyst settling separation tank, angle valve, settling separation conveying pump, mixer and catalyst separator, the feed end of catalyst settling separation tank top is used to access reaction turbidity, the feed end of settling separation conveying pump is communicated with the angle valve in the discharge end of catalyst settling separation tank bottom, the feed end of mixer is communicated with the discharge end of settling separation conveying pump, the feed end of catalyst separator middle part is communicated with the discharge end of mixer, the discharge end of catalyst separator bottom is used to discharge slurry containing catalyst;Toluene is also provided on the inlet end of mixer, and a lower sight glass is provided in the lower part of the catalyst separator. The utility model can effectively separate the fresh large-particle catalyst added in the later stage from the withdrawn waste catalyst, recover the catalyst and reduce the waste of catalyst.

This invention discloses a method for preparing intrinsically flame-retardant nylon 6, belonging to the field of polymer material synthesis technology. The method includes the following steps: 1) reacting caprolactam, an initiator, and a heat stabilizer under nitrogen protection at 160-180℃ and 0.1-0.3 MPa for 2-3 hours to prepare a nylon prepolymer (oligopolymer) with a number-average molecular weight of 500-2000; 2) adding terminal amino-terminated organosilicon to the nylon prepolymer, and copolymerizing at 200-230℃ and 0.3-0.6 MPa for 3-5 hours, followed by atmospheric pressure reaction, vacuum devolatilization, cooling, and granulation to obtain intrinsically flame-retardant nylon 6 particles; 3) optionally, subjecting the particles to boiling and drying post-treatment to obtain the final product. This invention employs a two-step process of first preparing the prepolymer and then copolymerizing and modifying it, enabling the terminal amino-terminated organosilicon to be covalently embedded in the nylon 6 molecular chain, achieving intrinsic flame retardancy and solving problems such as easy migration of flame retardants, short-lasting flame retardant performance, and decreased mechanical properties in existing technologies. The resulting intrinsically flame-retardant nylon 6 has high flame retardant efficiency, excellent mechanical properties, and simple and controllable process, making it suitable for large-scale industrial production and widely used in electronics, automobiles, textiles and other fields.

The utility model relates to a kind of refining equipment, belong to caprolactam processing technical field, specifically a kind of high-purity caprolactam refining equipment, including sorting box, the top of sorting box is fixedly connected with feed hopper, a pair of discharge port is arranged in the side of sorting box, each discharge port is fixedly installed with discharge plate, further including sorting subassembly and transmission subassembly;The utility model has achieved the effect of realizing the multi-stage selection of caprolactam, solved the prior art although can realize the sorting effect of caprolactam, but it cannot realize good material collecting effect, for the caprolactam raw material in top cannot be effectively collected, leading to the problem that later-stage collection is more inconvenient.

The invention relates to the technical field of catalysts, and discloses a ZSM-5 type structure-containing all-silicon molecular sieve catalyst and a preparation method thereof, and a cyclohexanone-oxime gas phase Beckmann rearrangement reaction method, the method comprises the following steps: (1) mixing a silicon source, KOH, an organic alkali and water, and hydrolyzing to obtain a colloid mixture; (2) crystallizing the colloid mixture, and optionally concentrating the obtained crystallization mother liquor to obtain molecular sieve slurry; (3) mixing the molecular sieve slurry with a binder, and pulping to obtain molecular sieve-binder slurry; carrying out spray molding on the molecular sieve-binder slurry, and then roasting; and (4) contacting the product obtained by roasting in the step (3) with an alkaline buffer solution containing ammonium salt, ammonia water, magnesium salt and bromine salt, and then drying. The microsphere type all-silicon-1 molecular sieve catalyst prepared by the method has relatively high cyclohexanone-oxime conversion rate and caprolactam selectivity.

The present application relates to the technical field of polymer material chemical recycling, and in particular to a kind of nano-enzyme catalyst and process for its use in hydrothermal method degradation polycaprolactam.The nano-enzyme catalyst provided by the present application uses specific single metal or double metal combination as metal center, and is combined with specific organic ligand, can be efficiently and deeply degraded PA6 at relatively low temperature, and the catalyst can also be recycled, completely realizing the green recycling of PA6.The nano-enzyme catalyst provided by the present application can make the conversion rate of PA6 molecule reach 100% using hydrothermal method, and the caprolactam yield can be stably above 94%, avoiding the use of organic solvent with high toxicity, and realizing the whole green recycling from " waste containing PA6" to " renewable caprolactam monomer".

The present invention provides a solid dispersion comprising lurasidone or a pharmaceutically acceptable salt thereof and a carrier. The carrier material includes polyvinyl acetate phthalate (PVAP), polyvinyl alcohol (PVA), cellulose acetate phthalate (CAP), mesoporous silica, hydroxypropyl methylcellulose (HPMC), polyvinyl caprolactam-polyvinyl acetate-polyethylene glycol graft copolymer, acrylic resin, hydroxypropyl cellulose (HPC), povidone, copovidone, ethylcellulose, polyoxyethylene glycol, hypromellose acetate succinate (HPMCAS), hypromellose phthalate (HPMCP), or a combination thereof.

This invention relates to the field of catalyst technology, and discloses a method for preparing a microsphere molecular sieve catalyst and a method for the gas-phase Beckmann rearrangement reaction of cyclohexanone oxime, comprising: (1) carbonizing a waste cyclohexanone oxime gas-phase Beckmann rearrangement catalyst; (2) mixing the obtained product with water and slurrying it until the particle diameter in the slurry is less than 20 μm; (3) mixing the slurry, KOH, an organic template agent, and an alcohol; (4) crystallizing the colloidal mixture, and optionally concentrating the crystallization mother liquor to obtain a molecular sieve slurry; (5) mixing the molecular sieve slurry with a binder and slurrying it, spray-forming the molecular sieve-binder slurry, and then calcining it; (6) contacting the product obtained from calcination in step (5) with an alkaline buffer solution containing ammonium salt, ammonia, magnesium salt, and bromide salt, and then drying it. The catalyst obtained by this preparation method has a high cyclohexanone oxime conversion rate and caprolactam selectivity in a fluidized bed reaction system.

This application relates to the field of benzene residue resource recovery technology, and provides a device for deep benzene removal from benzene distillation residue, including a distillation column, a reboiler in the column bottom, the reboiler being connected to a steam inlet pipe and a steam outlet pipe, a column bottom remote pressure gauge being installed on the column bottom, and a nitrogen inlet pipe being connected to the column bottom, one end of the nitrogen inlet pipe being connected to a nitrogen source, and the other end extending to the bottom of the reboiler; a nitrogen remote pressure gauge and a nitrogen regulating valve are installed on the nitrogen inlet pipe between the nitrogen source and the column bottom; this device for deep benzene removal from benzene distillation residue can significantly reduce the column bottom temperature, thereby reducing steam consumption, and significantly improve the quality of gaseous benzene through nitrogen atomization, thereby improving the crude caprolactam benzene extraction efficiency, promoting the benzene residue distillation process to a more energy-efficient and greener stage, and meeting the requirements of process quality improvement and consumption reduction.

The invention belongs to the technical field of chemical engineering separation, and provides a natural eutectic solvent and a preparation method and application thereof, the natural eutectic solvent comprises the following components: caprolactam, citric acid and water; wherein the molar ratio of caprolactam to citric acid is (1-4): (1-2); the mass of the water is 20-40% of the sum of the mass of the caprolactam and the mass of the citric acid. By introducing water as a third component, the viscosity of the system is effectively reduced, the mass transfer performance is improved, and the denitrification efficiency is improved. The eutecticevaporate solvent provided by the invention can provide more reaction sites, has relatively strong removal capacity and selectivity on nitrogenous organic matters, and can realize efficient denitrification under mild conditions. The natural deep-eutectic solvent prepared by the preparation method disclosed by the invention is applied to removal of basic nitrides of oil products, and has the advantages of short time consumption and low dosage, namely high removal efficiency.

The application relates to the field of antistatic materials and discloses an antistatic agent, an antistatic resin composition and application thereof. Based on the total mass of the antistatic agent, the antistatic agent contains 93-99 wt% of a block copolymer and 1-7 wt% of component A; the block copolymer is obtained by reacting caprolactam, a dicarboxylic compound, a diamine compound and an antioxidant in the presence of an acidic catalyst; the diamine compound is selected from the combination of at least one of a polyether diamine and a C6-C15 linear alkyl diamine; component A contains sulfonate and stannate; the sulfonate is a halogen-substituted C1-C12 alkyl sulfonate. The antistatic agent has low surface resistivity, high heat resistance and excellent flame retardant performance.

Abstract Disclosed are biosynthetic methods and engineered microorganism that enhance or improve the biosynthesis of hexamethylenediamine, caproic acid or caprolactam. The engineered microorganisms include selected aldehyde dehydrogenase activity. Abstract 1 / 10 wo 2020 / 219863 PCT / US2020 / 029793 +HO2C 5CoA 5CoA SUCCINYL-CoA ACETYL-CoA A A HO2C 5CoA E,F,G HO2C 002H 3-OXOADIPL-CoA 3-OXOADIPATE B H OH OH HO2C 5CoA HO2C 002H 3-HYDROXYADIPYL-CoA 3-HYDROXYDIPATE C 000000 HO2C 5CoA HO2C OO2H 3-CARBOXY-2-PENTENOYL-CoA 5-CARBOXY-2-PENTENOATE D K,L,M HOC 5CoA HO2C OO2H ADIPYL-CoA ADIPATE X N Y H Z HO2C HO2C OPO3 ADIPATE SEMIALDEHYDE ADIPYLPHOSPATE O,P HO2C NH 6-AMINOCAPROATE S Q,R CoAS NH NH T 6-AMINOCAPROYL-CoA CAPROLACTAM U H V,WNH2 H2N NH2 6-AMINOCAPROATE SEMIALDEHYDE HEXAMETYLENEDIAMINE Fig. 1 SUBSTITUTE SHEET (RULE 26) 20 26 20 48 92 24 J un 2 02 6 1 / 1 0 w o 2 0 2 0 / 2 1 9 8 6 3 P C T / U S 2 0 2 0 / 0 2 9 7 9 3 2 0 2 6 2 0 4 8 9 2 2 4 J u n 2 0 2 6 A 5 C o A E , F , G H O 2 C O O 2 H 3 - O X O A D I P L - C o A 3 - O X O A D I P A T E B H O H O H 5 C o A H O 2 C 0 0 2 H 3 - H Y D R O X Y D I P A T E C 000000 H O 2 C 5 C o A O O 2 H 3 - C A R B O X Y - 2 - P E N T E N O Y L - C o A J O O 2 H 5 C o A H O 2 C A D I P Y L - C o A A D I P A T E X N Y H Z H O 2 C H O 2 C O P O 3 A D I P Y L P H O S P A T E H O 2 C N H 6 - A M I N O C A P R O A T E S Q , R C o A S N H N H 2 T 6 - A M I N O C A P R O Y L - C o A C A P R O L A C T A M U H V , W N H H 2 N N H 2 6 - A M I N O C A P R O A T E S E M I A L D E H Y D E H E X A M E T Y L E N E D I A M I N E F i g . 1 S U B S T I T U T E S H E E T ( R U L E 2 6 )

The application discloses a kind of transparent copolyamide resin and its preparation method, comprising: by containing triazole side group aromatic diacid and alicyclic diamine is prepared by salt reaction polyamide salt, again with caprolactam random copolymerization and preparation obtained target resin.The transparent copolyamide resin involved in the application has the characteristics of simple synthetic route, process environmental protection, product diversification, excellent heat resistance, high toughness and high light transmittance etc..

The application discloses a continuous polymerization method of anti-gel copolyamide 56 / 6 and the anti-gel copolyamide 56 / 6, and the continuous polymerization method comprises the following steps: preparing a water solution of polyamide 56 salt by using bio-based pentanediamine and adipic acid, mixing with caprolactam and / or a prepolymer thereof, conveying to a first-stage reactor, pre-polymerizing under normal pressure to form a prepolymer, conveying to a tubular programmed temperature device for programmed temperature and pressure maintaining, then conveying to a second-stage reactor for post-polymerization reaction, obtaining a copolyamide 56 / 6 melt, and finally cooling, granulating and drying to obtain the anti-gel copolyamide 56 / 6. The polymerization process of normal pressure pre-polymerization combined with programmed temperature can reduce the cost of polymerization equipment, effectively inhibit the side reaction of pentanediamine monomer decomposition and volatilization in the preparation process, reduce the melting point through copolymerization, thereby the spinning temperature of the obtained copolymer for spinning can be reduced, the gelation in the spinning process is reduced, the melt stability of the copolymer is enhanced, and the application in the spinning field is met.

This invention belongs to the field of photosensitive materials technology, specifically relating to a multi-curing photosensitive adhesive with strong weather resistance and its preparation method. This invention overcomes the limitations of traditional photosensitive adhesives in terms of curing depth and light source compatibility. The oil phase component introduces a fluorosilicone epoxy-polyurethane acrylate composite resin and a multifunctional diluent, integrating epoxy groups, acrylate groups, and siloxane groups on the same molecular chain. Combined with a full-band composite initiator, it achieves rapid response to 365nm UV, 405nm laser, and mercury lamps. Deep cross-linking is achieved through cationic polymerization and moisture condensation, significantly improving adhesion and solvent resistance. The aqueous component uses fluorosilicone-modified polyvinyl alcohol and aminofluorosilicone-modified polyvinyl acetate as amphiphilic emulsifying stabilizers, combined with a gradient emulsification process to form a stable oil-in-water emulsion. Combined with caprolactam-blocked latent curing agents, it achieves long-term storage at room temperature. After heating and unblocking, it cross-links with hydroxyl groups, improving film density and exhibiting ultra-high storage stability and long-lasting weather resistance.

This application discloses the application of samarium-doped zirconium-titanium composite oxides in catalyzing lactone ring-opening, amination, cyclization, and N-alkylation reactions. It belongs to the field of chemical synthesis technology. This invention uses a novel samarium-doped zirconium-titanium composite oxide as a catalyst. This catalyst possesses abundant oxygen vacancies and Lewis acid sites, enabling it to efficiently catalyze lactone ring-opening, amination, cyclization, and N-alkylation reactions, lowering the reaction energy barrier. Using this catalyst, N-butylcaprolactam, N-methylaniline, and 1-(3-methoxypropyl)-2-pyrrolidone were successfully prepared. The preparation method is simple, environmentally friendly, highly atom-economical, and suitable for large-scale production.

This invention discloses a functionalized graphene quantum dot fluorescent ink composition and its preparation method, belonging to the technical field of anti-counterfeiting printing functional materials. The ink composition, based on a total weight of 100 parts, comprises 0.8-2.5 parts of graphene quantum dots co-modified with phosphonic acid and poly(N-vinylcaprolactam), 25-40 parts of an aqueous polyurethane dispersion, 0.5-1.5 parts of benzo-15-crown-5-carboxylic acid, 0.3-0.8 parts of a dispersant, 0.2-0.6 parts of a leveling agent, 0.1-0.3 parts of a defoamer, and the balance being deionized water. The quantum dots are prepared by a one-step hydrothermal method using citric acid, N-vinylcaprolactam, and vinylphosphonic acid as core raw materials in the presence of an initiator and a crosslinking agent. The ink of this invention simultaneously possesses photoluminescence, temperature response, and Fe... 3+ It features a triple anti-counterfeiting function with specific identification, and there is a synergistic enhancement effect between temperature sensitivity and ion response. At the same time, the ink has excellent storage stability and printability, making it suitable for high-end anti-counterfeiting fields.

This invention relates to a polyamide 6 microsphere and its preparation method. The preparation method of the polyamide 6 microsphere includes: melting caprolactam, adding an initiator and reacting at 120-130 °C for 10-30 min; then adding a solvent consisting of a mixture of hydrocarbons and high-boiling-point ethers in a volume ratio of 1:9 to 9:1; adding an appropriate amount of dehydrating agent and an appropriate amount of activating agent; and reacting at 135-150 °C for 20-90 min to obtain polyamide 6 microspheres. This invention uses hydrocarbons and high-boiling-point ethers as a mixed solvent and employs precipitation polymerization without solvent etching to directly prepare spherical, narrowly distributed, high-purity, and controllable-size polyamide 6 microspheres. This meets the high-performance application requirements of 3D printing, bioseparation, and high-end coatings, which are unattainable by traditional methods. Furthermore, the mixed solvent used in the preparation process can be recycled and reused.

The utility model relates to a catalytic system belongs to caprolactam catalysis technical field, specifically a kind of high-efficiency catalytic system for caprolactam production, including box, rotating sleeve pipe is rotatably connected on the box;The utility model is provided with the setting of stirring mechanism, and starting motor drives driving shaft, U-shaped rod and rotating shaft rotation, rotating shaft rotation drives rotating sleeve pipe, fixed cylinder and fixed pipe rotation through two bevel gears, fixed pipe rotation drives one-way outlet pipe and water spray pipe to carry out circumferential rotation, U-shaped rod rotation drives L-shaped slide bar and piston reciprocating movement through connecting rod, and the solution in the bottom of box is extracted into fixed pipe by one-way inlet pipe through piston reciprocating movement, then is introduced into water spray pipe by one-way outlet pipe, then water spray pipe sprays, so that solution can be fully mixed, to improve the mixing effect of solution, solve the solution in the bottom of box and easily precipitate, leading to the problem of uneven solution concentration.

This application discloses a PVC resin composition for surface coating, its preparation method, and its application, belonging to the field of polymer materials technology. The composition comprises the following components by weight: 100 parts of polyvinyl chloride resin; 2-5 parts of ASA adhesive powder; 3-6 parts of ionic liquid; 0.5-2 parts of lubricant; 1.5-2 parts of processing aid; 3-5 parts of heat stabilizer; and 3-8 parts of impact modifier. The ionic liquid is selected from at least one of 1-hexyl-3-methylimidazolium tetrafluoroborate and 1-(3-sulfopropyl)caprolactam-p-toluenesulfonate. The ASA adhesive powder has a core-shell structure, with the core being butyl acrylate copolysilicon and the shell being SAN. This application, through the compounding and synergistic effect of a specific ionic liquid and ASA adhesive powder, enables the resulting resin composition to simultaneously achieve excellent comprehensive properties such as strong coating adhesion, high surface smoothness, and good high-temperature dimensional stability when used for coating the surface of a substrate film, effectively solving the technical problem that traditional PVC coating materials cannot simultaneously achieve multiple key properties.

This invention relates to a method and chemical apparatus for separating benzene from a liquid stream containing at least one pyrolysis oil manufactured from plastic waste and further converting said benzene into cyclohexanone. Cyclohexanone is suitable as a precursor for azircycloheptane-2-one (ε-caprolactam) and adipic acid (at least a portion of which is based on benzene manufactured from plastic waste). Furthermore, polyamide-6 and polyamide-66 can be manufactured by the method according to the invention.

The application discloses a kind of high-strength deformable porous hydrogel for postoperative abdominal cavity tissue effusion drainage, belong to medical porous hydrogel technical field, specifically related to monomer, crosslinking agent and initiator are added to water and mixed to obtain the reaction solution of temperature-sensitive hydrogel, freeze polymerization obtains ice gel;Ice gel is placed in salt solution and is handled to obtain porous hydrogel;Monomer includes at least one of N-isopropyl acrylamide, N-vinyl caprolactam, N,N-diethyl acrylamide, N-vinyl carbazole, acrylic acid, methyl methacrylate, ethylene glycol methyl ether acrylate, butyl methacrylate, maleic anhydride and styrene.The application provides a kind of temperature-sensitive effect, can be dynamically controlled by electric heating, good mechanical property, good drainage effect high-strength deformable porous hydrogel for postoperative abdominal cavity tissue effusion drainage.

This invention relates to the field of new material preparation technology, and discloses a biodegradable membrane resin and its preparation method. The preparation method includes: (1) mixing ε-caprolactone, toluene and a catalyst to obtain an ε-caprolactone solution; (2) pumping the ε-caprolactone solution, an initiator and caprolactam into a microchannel reactor for reaction to obtain a precursor product; (3) contacting the precursor product, a diamine and a diacid in a high-pressure reactor for reaction; (4) co-extruding the product obtained in step (3) with an additive to obtain a biodegradable membrane resin. This invention uses a stepwise preparation method for process control, which can effectively improve the mechanical properties of the prepared biodegradable membrane resin, while ensuring the resin's excellent processability, biodegradability and other comprehensive properties.

The present disclosure provides siloxane derivatives of amino acids that have surface-active properties. The amino acid can be naturally-occurring or synthetic, or they may be obtained via a ring-opening reaction of a lactam, such as caprolactam. The amino acid may be functionalized with a siloxane group to form a compound that is surface-active and has surfactant characteristics. The compounds have low critical micelle concentrations (CMC) as well as the ability to lower the surface tension of a liquid.

The present application relates to the technical field of caprolactam preparation, and particularly discloses a method for producing high-purity cyclohexanone oxime and an internal membrane two-stage ammonoxidation reaction system. The cyclohexanone, hydrogen peroxide and ammonia are introduced into a first reactor containing methylene-modified TS-1 molecular sieve, and a first-stage ammonoxidation reaction is carried out at 90-120 DEG C. After 1-5 min, the obtained first-stage reaction liquid is sent into a second reactor, and a second-stage ammonoxidation reaction is carried out at 70-88 DEG C. After solid-liquid separation, a mixed clear liquid containing cyclohexanone oxime and water is obtained. The mixed clear liquid is extracted with toluene, and the extract is subjected to rectification to obtain cyclohexanone oxime. The two-stage differential ammonoxidation reaction is adopted, the first-stage reaction is carried out at high temperature and fast, and the second-stage reaction is carried out at low temperature and mature, and the reaction efficiency is improved by using a specific ammonoxidation catalyst, so that the cyclohexanone oxime is efficiently prepared. The internal membrane separation catalyst is used, so that the catalyst can be completely recovered.

The application discloses an antibacterial bio-based polyamide elastomer and a preparation method thereof. The preparation method comprises the following steps: preparing a polyamide prepolymer containing a tertiary amine structure through ring-opening polymerization reaction of caprolactam, N-diethyl-aminocaprolactam and sebacic acid, then reacting with polytetramethylene ether glycol to form a polyamide-polyether block copolymer elastomer, and further modifying the polyamide-polyether block copolymer elastomer through reaction with a halogenated hydrocarbon to realize quaternary ammonium modification, so that the quaternary ammonium salt antibacterial group is stably introduced into the polymer molecular structure in a covalent manner. The bio-based polyamide elastomer prepared by the application has excellent elastic properties and persistent and stable quaternary ammonium antibacterial properties, the antibacterial components are not easy to migrate and lose, the preparation process is simple and controllable, is suitable for the field of functional materials, and has a good application prospect.