165 results about "Catechin" patented technology

The invention relates to the technical field of polymer degradable materials, in particular to a biodegradable material as well as a preparation method and application thereof. The material takes modified polylactic acid as a main body, and an antioxidant, a plasticizer, a flame retardant and an inorganic filler are used as auxiliary materials in parts by weight. The method is characterized in that lactic acid and an epicatechin imidazole ammonium chloride polymer are polymerized under the catalysis of stannous octoate, and an epicatechin bioactive group is introduced into a polylactic acid main chain in a chemical bonding manner, so that the biodegradation rate, the mechanical property and the thermal stability of the material are remarkably improved. Bioactive substances and ionic groups in the material promote microbial degradation, and the material can be completely decomposed in a compost environment in a short time; meanwhile, the strength, the toughness and the high-temperature processability of the polylactic acid are effectively improved through molecular-level enhancement and an ionic cross-linking effect. The material can be widely applied to the fields of disposable tableware, food packaging films, degradable agricultural mulching films and the like.

The present invention discloses coated hydrophobic polyphenol nanoparticles, preparation method therefor and application thereof. The preparation method for coated hydrophobic polyphenol nanoparticles includes: (1) obtaining a hydrophobic polyphenol nanoparticles suspension; (2) injecting a catechin aqueous solution and a metal salt aqueous solution into the hydrophobic polyphenol nanoparticles suspension to obtain a composite nanoparticles suspension; (3) removing excess catechin and metal ions from the composite nanoparticles suspension to obtain a coated hydrophobic polyphenol nanoparticles suspension. The present invention provides an application of the coated hydrophobic polyphenol nanoparticles in the preparation of pectin gel. The coated hydrophobic polyphenol nanoparticles exhibit significantly enhanced biological activity and long-term stability, developing a pectin gel with long-term stability.

According to the preparation method disclosed by the invention, the whole fruit juice of the lonicera caerulea (which retains fruit residues) is fermented by virtue of the plant lactobacillus KLDS1.0391, KLDS1.0320 or KLDS1.0368, so that the xanthine oxidase (XO) inhibition activity is remarkably improved. After fermentation, the XO inhibition rate is increased to 48-50.87% (the content of unfermented juice is 31.21%), the total phenol content is increased by 15-24.3%, and the contents of main XO inhibitors in the lonicera caerulea: cyanidin-3-O-glucoside (IC50 = 115.28 [mu] M), cyanidin-3, 5-diglucoside (IC50 = 116.34 [mu] M), peonidin-3-glucoside (IC50 = 105.34 [mu] M), quercetin (IC50 = 88.75 [mu] M), catechin (IC50 = 110 [mu] M) and caffeoylquinic acid (IC50 = 250.35 [mu] M) are remarkably increased. Wherein the quercetin content is increased by 73.8% at most (KLDS1.0320 strain fermentation is performed for 24 hours), and the XO inhibition rate is increased from 31.21% to 50.87%. Technical support is provided for development of a natural XO inhibitor and a functional fermented beverage, so that a new thought is provided for functional fermented juice with lonicera caerulea as a key component.

The invention discloses a formula composition which is prepared from the following components in parts by weight: 100 to 400 parts by weight of grape seed procyanidine, 100 to 300 parts by weight of pomegranate polyphenol, 10 to 100 parts by weight of ergothioneine, 50 to 200 parts by weight of catechin and 100 to 400 parts by weight of astragalus polysaccharide. According to the invention, cell-level anti-aging is taken as a core logic, five active ingredients of grape seed procyanidine, pomegranate polyphenol, ergothioneine, catechin and astragalus polysaccharide are scientifically compounded, a multi-dimensional anti-oxidation defense system is constructed, and multiple effects of scavenging free radicals, repairing cell damage, delaying an aging process and the like can be realized.

The invention relates to the technical field of blueberry puree preparation, and relates to a blueberry puree prepared based on cryogenic grinding, oxidation and isolation. The blueberry puree comprises the following components in parts by weight: 90-100 parts by weight of blueberries, 0.1-0.5 parts by weight of a composite stabilizer, 1-5 parts by weight of a honey protective agent, 0.03-0.05 parts by weight of an L-cysteinease inhibitor, and 0.3-0.7 parts by weight of a citric acid buffer. The composite stabilizer is obtained by mixing phytic acid, sodium pyrophosphate, and modified catechin in a ratio of 1:0.2-0.6:1-3, and the modified catechin is prepared by a glycosylation reaction of catechin and rhamnose in the presence of a rhamnosyltransferase catalyst. The composite stabilizer is used to improve the antioxidant capacity and the ability to stabilize active components in the blueberry puree preparation process, thereby extending the shelf life. At the same time, the cryogenic grinding, oxidation and isolation preparation technology is used to retain the nutrients and active substances in the blueberries to the greatest extent, thereby ensuring the high quality of the product.

The invention discloses oral multi-effect analgesic and anti-inflammatory gel and a preparation method thereof, and belongs to the technical field of medical gel. The gel is prepared from mussel mucin grafted hydroxypropyl chitosan, a poly (N-isopropylacrylamide)-co-acrylic acid copolymer, quercetin-zinc coordination nanoparticles, a local anesthetic compound wrapped by temperature-sensitive lipidosome, a gamma-polyglutamic acid-catechin gel matrix, aloe polysaccharide, dipotassium glycyrrhizinate, and sodium hyaluronate and potassium sorbate which can be selectively added, wherein the local anesthetic compound is prepared from the mussel mucin grafted hydroxypropyl chitosan, the poly (N-isopropylacrylamide)-co-acrylic acid copolymer, the quercetin-zinc coordination nanoparticles, the temperature-sensitive lipidosome, the gamma-polyglutamic acid-catechin gel matrix, the aloe polysaccharide and the dipotassium glycyrrhizinate. During preparation, part of the components and water are stirred to obtain a mixed solution, and then the other components are added and stirred into gel. According to the gel, the leakage rate of local anesthetics is reduced by stabilizing the liposome through the zinc ions, the quercetin adjusts the phase transition temperature of the liposome to realize preferential drug release at the pain part, the mussel mucin and the copolymer form a reversible hydrogen bond network to enhance the mucous membrane adhesive force, and the inflammatory environment triggers the gel permeation drug release, so that the gel has the advantages of multiple-effect synergy, strong adhesion and the like; the problems that existing oral gel is short in analgesia time and insufficient in anti-inflammation can be effectively solved.

The present invention provides an oral composition that can be used for anti-obesity, suppressing fat absorption, suppressing an increase in neutral fat, suppressing sugar absorption, suppressing an increase in blood sugar level, reducing body fat, or reducing BMI. An oral composition containing gallic acid and catechins, The oral composition has a mass ratio of gallic acid:catechins=1:0.1 to 5. The oral composition preferably further contains ellagic acid. It is also preferably used for anti-obesity, suppression of fat absorption, suppression of increase in neutral fat, suppression of sugar absorption, suppression of increase in blood glucose level, reduction of body fat, or reduction of BMI.

To provide fish and shellfish feed, fish and shellfish feed additives, a method for producing fish and shellfish feed, and a method for raising fish and shellfish that can produce fish and shellfish in good health. [Solution] The following components (A) and (B): (A) Non-polymerized catechins 0.001-1.5% by mass (B) Oligosaccharides A fish and shellfish feed containing [this ingredient].

The present application belongs to the field of metal wire cleaning, and provides a cleaning and passivation method for special-shaped copper wire with grooves and small wire diameter; first, the copper wire is pre-blowed by an annular air knife to remove surface attachments, and is introduced into a groove guide water pipe; then, directional hot water consistent with the groove direction of the copper wire is used for strong flushing, and catechin gel mother liquor is added in the cleaning liquid and a brush is arranged for cooperative brushing; the copper wire is introduced into an ultrasonic cleaning tank for reciprocating deep purification, and the purified copper wire is introduced into a hot air duct arranged in the groove for deep dehydration and guide flow drying; the copper wire is introduced into a passivation chamber provided with an ultrasonic atomizer, and a passivation liquid containing a succinimidazole agent is atomized into uniform fine mist droplets to cover the copper wire; after the copper wire is finally dried by hot air, film formation and solidification are completed, and then the copper wire is wound, effectively solving the problems of difficult cleaning of special-shaped copper wire grooves and uneven passivation film, and improving the surface quality and oxidation resistance of the product.

The invention discloses a platelet increasing capsule characteristic chromatogram and a construction method and application thereof, and belongs to the technical field of quality control of traditional Chinese medicine compound preparations. According to the method, 13 control components including gallic acid, catechin, paeoniflorin, forsythiaside B, benzoic acid, astragalus smicus glycoside, forsythin, arctiin, liquiritigenin, benzoyl paeoniflorin, paeonol, arctigenin and indirubin are selected, a high performance liquid chromatography-mass spectrometry technology is applied, multiple batches of preparation samples are analyzed, and the content of the components in the preparation samples is determined. And establishing a characteristic spectrum of the chemical components. Compared with a traditional method, the technology has good precision and reproducibility, the data result is accurate and reliable, meanwhile, the technology can identify the 13 components at the same time under the same chromatographic condition, the analysis efficiency is remarkably improved, synchronous monitoring of multiple effective components is achieved, and the consistency and stability of the preparation quality can be guaranteed.

The invention discloses an antioxidant and antibacterial collagen repair membrane and a preparation method thereof. The repair membrane is prepared by sequentially carrying out polylysine graft modification and catechinic aldehyde and aminoglycoside antibiotic synchronous covalent grafting on a purified collagen membrane. By controlling parameters such as molecular weight and concentration of polylysine, proportion and loading capacity of functional molecules, reaction conditions and the like, accurate regulation and control of film thickness, function release rate, oxidation resistance and antibacterial performance can be realized. The invention further provides a double-layer composite membrane structure, the rapid antibacterial layer and the long-acting anti-oxidation layer are compounded, and function decoupling and time sequence collaboration are achieved. The repair membrane has excellent oxidation resistance and broad-spectrum antibacterial performance, is good in biocompatibility and adjustable in degradation rate, can be customized according to different clinical requirements, and is suitable for oral wound repair, periodontal guided tissue regeneration, bone tissue induced regeneration, peri-implantitis prevention and treatment and chronic refractory wound treatment.

The invention belongs to the field of extraction, processing and application of natural plant products, and particularly relates to a preparation method of a grape seed extract and application of the grape seed extract in preparation of a composition for preventing hair loss and growing hair. Tests prove that the grape seed extract can remarkably promote proliferation of hair papilla cells, inhibit apoptosis of the hair papilla cells and remarkably promote expression of factors representing that hair papilla enters an active cycle, is beneficial to inducing or maintaining the growth period of hair follicles and achieving self-rebuilding of the hair follicles, has good effects of preventing hair loss and growing hair, and can be used for preventing hair loss. A new way is provided for development and utilization of the grape seed extract.

The invention discloses a method for stabilizing wild cranberry anthocyanin by catechin, and belongs to the field of functional food development. The operation process comprises the following steps: treating cranberries at-20 DEG C, cleaning, crushing, mixing with 75% ethanol, and carrying out centrifugal adsorption to obtain an extracting solution; preparing a standard solution by using 12% ethanol and 5.0 g / L citric acid, and adjusting the pH value of the standard solution to 3.6 by using 1 mol / L sodium hydroxide; and finally, adding the wild cranberry extracting solution and catechin into the standard solution according to the gradient molar ratio of (1: 0.5, 1: 1, 1: 1.5 and 1: 2), carrying out ultrasonic treatment at the temperature of 25 DEG C for 30 minutes at the power of 150w, and placing in a dark place for 2 hours. The above method is a method for stabilizing wild cranberry anthocyanin by catechin.

The invention discloses an ionic liquid transmucosal delivery system based on polyphenol modification. A preparation method comprises the following steps: S1, preparing polyphenol modified ionic liquid by adopting aromatic folic acid, polyphenol A and choline bicarbonate; the polyphenol A is gallic acid or caffeic acid; s2, polyphenol B is dissolved in ultrapure water, a biomacromolecule medicine is added, freeze drying is performed after ultrasonic treatment, and polyphenol-biomacromolecule nanoparticles are obtained; the polyphenol A is epigallocatechin-3-gallate, and the polyphenol B is epigallocatechin-3-gallate or tannic acid; s3, adding the polyphenol-biomacromolecule nanoparticles into the ionic liquid, and performing ultrasonic treatment to obtain the ionic liquid transmucosal delivery system based on polyphenol modification. According to the drug delivery system, polyphenol participates in ionic liquid construction, more intermolecular interaction force sites are provided for the ionic liquid, the charge property of the ionic liquid is reduced, and meanwhile, polyphenol-biomacromolecule nanoparticles are constructed to prolong the in-vivo action time of the drug.

The invention relates to the technical field of feed additives, in particular to a Chinese herbal medicine ultrafine powder feed additive and a preparation method thereof, the following raw materials are respectively weighed: codonopsis pilosula, acanthopanax, hawthorn, andrographis paniculata, citric acid, catechin, L-ascorbyl palmitate and reduced glutathione; immersing the codonopsis pilosula sections, the acanthopanax sections and the haw slices into enzymatic hydrolysate to carry out enzymatic hydrolysis reaction; crushing the codonopsis pilosula, the acanthopanax, the hawthorn and the andrographis paniculata sections subjected to enzymolysis by using a hammer crusher to obtain mixed powder; adding citric acid, catechin, L-ascorbyl palmitate and reduced glutathione, and mixing; the mixture is subjected to superfine grinding through a jet mill, and superfine powder is obtained; and mixing the superfine powder with hydroxypropyl-beta-cyclodextrin, adding water to prepare slurry, stirring and clathrating, and then carrying out spray drying to obtain the Chinese herbal medicine superfine powder feed additive.

The present invention discloses a biological polypeptide detection method, which belongs to the field of biological detection technology and comprises the following steps: taking muscle tissue of a sample, crushing it to obtain a homogenous sample for standby use; adding water to the homogenous sample, and after crude extraction, adding an adsorption resin, after static adsorption, filtering and collecting the adsorption resin, and using ethanol desorption treatment, filtering out the adsorption resin, and using the obtained filtrate as a sample solution for standby use; using UHPLC-MS / MS coupling method to detect the content of carnosine and anserine in the sample solution; wherein the adsorption resin is a polystyrene-divinylbenzene copolymer macroporous adsorption resin or a modified macroporous adsorption resin I, and the modified macroporous adsorption resin I adopts (-)-catechin and kaempferol-3-O-sophorobiose-7-O-glucoside to modify the polystyrene-divinylbenzene copolymer. The method of the present invention is simple to operate, has high accuracy and good reproducibility, and can improve the extraction effect of carnosine and anserine.

This invention discloses a mitochondrial-targeted nanomaterial for senescent cells and its application in anti-aging. The material is a nucleic acid aptamer-tetrahedral DNA, mainly assembled from four single-stranded DNA sequences, SEQ ID Nos. 1-4. Preparation involves first hybridizing the four single-stranded DNA sequences, then concentrating them to obtain aptamer-modified tetrahedra, which are then coupled with tannic acid (TA) via a Mann reaction in the presence of formaldehyde to obtain the Apt-tFNAs-TA complex. Finally, it is incubated with excess catechins to obtain the final delivery material, Apt-tFNAs@catechin-TA. This invention's material exhibits good biocompatibility and skin tissue compatibility, significantly improving uptake efficiency and mitochondrial localization ability in senescent cells. It can effectively deliver polyphenolic compounds such as catechins and protocatechuic acid, improving mitochondrial function and addressing the technical problems of low delivery efficiency of active ingredients and insufficient targeted enrichment in senescent cells.

The invention discloses a catechin silver nano antibacterial particle as well as a preparation method and application thereof, and belongs to the technical field of antibacterial materials. The silver catechin nano antibacterial particles disclosed by the invention are Ct-Ag NPs, and the silver catechin nano antibacterial particles are Ct-Ag NPs; the Ct-Ag NPs is of a spherical structure; the average particle size of the Ct-Ag NPs ranges from 142 nm to 162 nm; ag in the Ct-Ag NPs is uniformly dispersed in catechin to form a core-shell structure. The preparation method of the silver catechin nano antibacterial particles comprises the following steps: weighing catechin, and dissolving the catechin in a sodium hydroxide solution to obtain a catechin sodium salt solution; adding the silver nitrate solution into the ammonia water solution to obtain a silver ammonia solution; and under the conditions of stirring and ice bath, adding the catechin sodium salt solution into the silver ammonia solution, centrifuging, cleaning with trichloromethane, and drying to obtain the Ct-Ag NPs. The Ct-Ag NPs provided by the invention has a core-shell structure, and the quorum sensing inhibitor shell Ct can effectively reduce the generation of biological membranes, so that bacteria are more sensitive, and the bactericidal effect of continuously releasing Ag < + > is effectively improved.

This invention discloses an environmentally adaptive high-energy-absorbing smart anti-corrosion coating and its preparation method, comprising: synthesizing a dipyrazole diamine chain extender, formulating a long-chain polymer backbone A and a catechol-terminated short-chain polymer B, and preparing a high-energy-absorbing smart anti-corrosion coating; the coating utilizes the interaction between dipyrazole and Zn in the long chain. 2+ Multiple coordination reduces the entropy increase effect of bond breaking and enhances energy dissipation; gradient hierarchical hydrogen bonds between long and short chains, in coordination with metal coordination bonds, act as sacrificial bonds to dissipate energy through stepwise breakage under external force; the slightly alkaline nature of seawater triggers deprotonation of catechols and reconstructs the coordination network, increasing crosslinking density and enhancing shielding; and the Fe released at the breakage site... 3+ By strongly coordinating with catechins to form a passivation layer in situ, and using its photothermal effect to drive the self-repair of the substrate, this invention solves the problem of the difficulty in simultaneously achieving high energy absorption, fatigue resistance, environmental response, efficient self-repair and intelligent corrosion prevention in offshore wind turbine tower coatings, which helps to extend the service life of wind turbine towers and ensure the reliability of the units.

The invention discloses a method for relieving cold injury of tobacco seedlings. After low-temperature stress, the compound solution of catechin and abscisic acid is sprayed to the tobacco seedlings, so that the activity of SOD and CAT is improved, and the content of H2O2, OFR and MDA is remarkably reduced. According to the technical scheme, the cold resistance of the tobacco seedlings can be effectively improved, and the method has the advantages of being convenient to use, green, safe and the like.

This invention discloses a method for determining the content of gallic acid and (+)-catechin in *Hedysarum heterotropoides* medicinal materials. After reflux treatment with 60% methanol solution in a water bath, the *Hedysarum heterotropoides* medicinal materials are subjected to high-performance liquid chromatography (HPLC) with octadecyl-bonded silica gel as the stationary phase and acetonitrile (A)-0.1% phosphoric acid aqueous solution (B) as the mobile phase. The peak area values ​​of gallic acid and (+)-catechin showed good linearity in the injection amounts of 10.00–100.0 μg and 200.0–2000 μg, respectively, with average recoveries of 98.31% and 97.68%, and RSD values ​​of 1.2% and 1.2%, respectively. The method is simple and accurate, and can be used for the determination of gallic acid and (+)-catechin content, providing a theoretical basis for the quality control of *Hedysarum heterotropoides* medicinal materials.

Provided herein are process steps for the synthesis of (-)-epicatechin. The synthesis method provided by the invention is divided into two stages: (1) synthesizing an epoxide intermediate and (2) synthesizing the (-)-epicatechin.

This invention discloses a food composition with antioxidant and collagen synthesis-promoting effects and its preparation method, relating to the field of food technology. The food composition comprises the following ingredients in parts by weight: 300-500 mg collagen, 100-400 mg astragalus polysaccharide, 100-400 mg grape seed proanthocyanidins, 10-200 mg catechins, 5-100 mg ergothioneine, and 5-50 mg soybean oligopeptides. This food composition can increase the collagen content in the skin, enhance facial skin elasticity, reduce transepidermal water loss, and improve skin aging-related conditions. This invention constructs a dual-core synergistic formula of "antioxidant + collagen synthesis promotion" through the scientific formulation of seven active ingredients. All components of this invention use food-grade raw materials, making the formula mild and safe; all ingredients are natural extracts or edible raw materials, ensuring high safety, no obvious toxic side effects, and long-term daily use, making it suitable for a wide range of people.

The application discloses a kind of washable anti-deformation fabric and preparation method thereof, it is related to fabric technical field.The application uses natural antibacterial agent to carry out co-modification to cellulose fiber, natural antibacterial agent is composed of catechin, citric acid, amino acid, natural antibacterial agent utilizes its amino, carboxyl, hydroxyl, and the hydroxyl of cellulose fiber reacts, forms crosslinking structure, improves the wet strength and dimensional stability of cellulose fiber, further enhances the binding force between fibers, reduces the swelling and shrinkage of fiber in the washing process.Meanwhile, silver molybdate loaded sepiolite and finishing agent form a dense protective film on the surface of the fabric, prevent the penetration of water molecules and the adhesion of bacteria, further improve the washability and antibacterial property of the fabric.

This invention relates to the field of polymer degradable materials technology, specifically to a biodegradable material, its preparation method, and its applications. The material is based on modified polylactic acid (PLA), supplemented by antioxidants, plasticizers, flame retardants, and inorganic fillers in specific weight proportions. Its unique feature lies in the polymerization of lactic acid and epicatechin imidazole ammonium chloride polymer under stannous octoate catalysis, using chemical bonding to introduce the bioactive groups of epicatechin into the PLA backbone, significantly improving the material's biodegradation rate, mechanical properties, and thermal stability. The bioactive substances and ionic groups in this material promote microbial degradation, achieving complete decomposition in a composting environment within a short time. Simultaneously, through molecular-level reinforcement and ionic cross-linking effects, the strength, toughness, and high-temperature processing performance of PLA are effectively improved. This material can be widely used in disposable tableware, food packaging films, and biodegradable agricultural mulch films.

The present invention relates to a composition for ameliorating, preventing or treating alopecia, comprising a catechin 7-O-β-D-apiofuranoside compound as an active ingredient. The compound of the present invention inhibits the production of dihydrotestosterone (DHT) converted from testosterone by 5-alpha-reductase in human-derived dermal papilla cells, and inhibits the apoptosis induced by oxidative stress in dermal papilla cells, and accordingly, can be used as an active ingredient for the treatment, prevention, or amelioration purposes.

The invention relates to the technical field of food characterization recognition and authentic identification, in particular to a characteristic difference metabolite composition of carthamus tinctorius from different producing areas and a screening method and application of the characteristic difference metabolite composition. The characteristic difference metabolite composition is selected from the group consisting of L-phenylalanine, L-citrulline, L-arginine, L-tyrosine, L-asparagine, L-aspartic acid, rutin, quercetin, quercitrin, kaempferol, baicalein, eriodictyol, isoquercitrin, kaempferol-3-O-glucoside, dihydrokaempferol, canthaxanthin, epicatechin, tryptamine and the like; the surfactant is selected from two or more of fumaric acid and betaine. The characteristic difference metabolite composition is obtained by screening through a screening method based on a metabonomics analysis technology, can be used for tracing the origin of safflower, is high in tracing accuracy and simple and convenient to operate, and has good economic benefits and social values.

The invention provides a rare earth complex and application thereof in biological control of cotton verticillium wilt. The rare earth complex comprises the following components in parts by mass: 1-5 parts of catechin polyphenol compounds; 15-25 parts of rare earth chloride salt; 12 to 18 parts of 5-sulfonyl salicylic acid; and 25-60 parts of water. According to the invention, a complex formed by rare earth elements and specific plant extracts or microbial metabolites is utilized, and the purpose of effectively preventing and treating cotton verticillium wilt is achieved by inhibiting growth and reproduction of pathogenic bacteria, destroying cell structures of the pathogenic bacteria or interfering metabolic pathways of the pathogenic bacteria and the like.

The invention discloses a preparation method and an application of a bone targeting catechin-strontium metal polyphenol nano particle. The system takes a metal-polyphenol network (MPN) formed by coordination self-assembly of strontium ions and catechin as a core, and tetracycline is modified on the surface of the MPN to construct a bone targeting functional layer. The MPN structure can significantly enhance the loading efficiency and physiological stability of catechin, and the tetracycline modification on the surface endows the nanoparticles with excellent bone targeting ability. When reaching an osteoporosis focus, the nanoparticles can respond to a local weakly acidic microenvironment and controllably release catechin, and exert antioxidant and anti-inflammatory effects, thereby reversing a pathological microenvironment unfavorable for bone regeneration. Meanwhile, the MPN skeleton is gradually degraded in vivo, and the released Sr < 2 + > can promote proliferation and differentiation of pre-osteogenic cells, inhibit the activity of osteoclasts and promote formation of new bones. The system integrates bone targeting, microenvironment response drug release, immunoregulation and ion regulation treatment, and provides a new strategy for precise treatment of osteoporosis.

The present application relates to the technical field of sealant, in particular to a flame-retardant modified MS sealant and a preparation method thereof.The present application obtains antibacterial fiber by adding chitosan, catechin, luteolin and kaempferol as main raw materials.Then, the present application obtains composite fiber by using silver ammine solution, glucose solution and antibacterial fiber as raw materials.The present application obtains silane modified acrylic resin by adding gamma-methacryloxypropyl trimethoxysilane, acrylic acid, flame-retardant acrylic monomer, antibacterial acrylic monomer, anti-aging vinyl monomer, azobisisobutyronitrile and ethyl acetate.Then, the present application obtains silane modified polyether resin by mixing the silane modified acrylic resin and polytetrahydrofuran and reacting.The present application obtains the finished product by mixing the silane modified polyether resin, composite fiber, plasticizer, filler, water removing agent and catalyst.The finished product prepared by the present application has excellent flame retardancy, antibacterial property and anti-aging property, so the present application has wide application prospect in the technical field of sealant.