61 results about "Carbodiimide" patented technology

This invention discloses a method and sensor for adiponectin detection using a polyaniline and polyacrylic acid-modified wire mesh carbon electrode, relating to the field of adiponectin detection technology. The method involves electrochemically activating the wire mesh carbon electrode, electropolymerizing it to form a polyaniline-polyacrylic acid composite modification layer, immobilizing adiponectin monoclonal antibody after activation with N-hydroxysuccinimide and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide, blocking the antibody with bovine serum albumin, and reacting it with a serum sample. The adiponectin concentration is determined based on the peak potential shift and peak current change. This invention simultaneously achieves both conductive transport and antibody immobilization, reduces non-specific adsorption and serum interference, and improves detection sensitivity, repeatability, and quantitative accuracy.

This invention provides a method for preparing dibenzoyl-p-benzoquinone dioxime using a microchannel reactor. The method includes the following steps: 1,3-dicyclohexylcarbodiimide and a catalyst are mixed uniformly and preheated to obtain a premix; a chloroform solution of p-benzoquinone dioxime, a chloroform solution of benzoic acid, and the premix are simultaneously introduced into the microchannel reactor for reaction; the resulting reaction solution is subjected to vacuum distillation, washing, filtration, and drying to obtain dibenzoyl-p-benzoquinone dioxime. The synthesis method of this invention features high reaction conversion rate, high production efficiency, few side reactions, and high safety. The obtained dibenzoyl-p-benzoquinone dioxime product has stable quality. Furthermore, the organic solvent used can be recovered and reused after vacuum distillation, overcoming the problems of inaccurate temperature control, poor safety, numerous side reactions, and difficult waste treatment in traditional processes. This provides a new approach for the synthesis of dibenzoyl-p-benzoquinone dioxime.

This invention relates to a method for testing the resistance to phenolic yellowing of carbodiimide anti-hydrolysis agent powder and its application. The testing method includes: (1) grinding the sample to be tested and spreading it evenly in a petri dish; (2) placing 2,6-di-tert-butyl-p-cresol in a petri dish of the same size as in step (1); (3) placing the test reagent in a container; (4) placing the petri dish from step (1), the petri dish from step (2), and the container from step (3) into a sealed container for aging; (5) immediately using a colorimeter to detect the yellowing index of the sample after aging in step (4). The method of this invention can accurately detect powdered or crystalline carbodiimide anti-hydrolysis agents, solving the problem that it is currently impossible to accurately detect the phenolic yellowing resistance of powdered samples.

The application relates to the technical field of cable material manufacturing, and discloses a light-weight flexible wear-resistant electrical equipment connecting cable, a sheath of the connecting cable being made of raw materials including the following: polyester type thermoplastic polyurethane elastomer, styrene-acrylonitrile copolymer, maleic anhydride grafted polyolefin elastomer, blocked isophorone diisocyanate, wear-resistant premixed solution containing a catalyst, slow-release foaming master batch and functional additives; wherein the wear-resistant premixed solution containing the catalyst contains hydroxyl-terminated polydimethylsiloxane and a bismuth octoate catalyst, the slow-release foaming master batch contains modified azodicarbonamide foaming agent and carrier resin, and the functional additives contain antioxidants and carbodiimide hydrolysis stabilizers. According to the application, the hydroxyl-terminated polydimethylsiloxane containing the catalyst and the blocked isocyanate are introduced into the polyurethane matrix in cooperation through a reaction extrusion process, the isocyanate groups are unblocked at high temperature, and the organic silicon chain segment is chemically bonded with the matrix resin.

The present invention relates to a hair coloring process comprising the application to the hair of at least one composition C comprising: - at least one (poly)carbodiimide compound; - at least one silicone acrylic copolymer; - at least one alkaline agent having a saturated vapor pressure at 20°C greater than or equal to 2500 Pa; and - at least one coloring agent selected from pigments, direct dyes, and mixtures thereof.

The present application relates to the technical field of artificial implant medical device surface modification and middle ear hearing reconstruction, and discloses a processing method for enhancing the fixing stability of an artificial auditory ossicle prosthesis, the prosthesis and application. The method comprises the following steps: after the surface of the auditory ossicle prosthesis in contact with the middle ear tissue is cleaned, a polydopamine layer is formed in a basic dopamine solution, then gelatin, hyaluronic acid or cellulose sulfate is connected to the surface of the polydopamine layer through a carbodiimide activation system to form a viscous functional layer, and the dry sponge-like structure is obtained through freeze-drying. The functional layer can quickly rehydrate and restore the adhesion state after contacting with human blood or tissue fluid, thereby improving the fixing stability of the artificial auditory ossicle prosthesis in the initial implantation stage and reducing the risk of displacement or dislocation.

One embodiment of the present invention relates to a graft-modified product, an adhesive, an olefin resin composition, or a laminate, and the graft-modified product is a graft-modified product of at least one base polymer selected from polyolefins by a carbodiimide monomer having a carbodiimide group and a polymerizable double bond.

This invention relates to the field of polymer materials technology, specifically to a permanent antistatic ABS composite material based on polyethylene polyamine-aminated carbon nanotubes, its preparation method, and its application. The method includes: Step 1, basicizing carbon nanotubes; Step 2, mixing carboxylated carbon nanotubes, N,N'-dicyclohexylcarbodiimide, and 4-dimethylaminopyridine, adding N,N-dimethylformamide solvent, and then adding polyethylene polyamine to obtain polyethylene polyamine-aminated carbon nanotubes; Step 3, grafting the polyethylene polyamine-aminated carbon nanotubes with a styrene-maleic anhydride copolymer to obtain styrene-maleic anhydride-grafted polyethylene polyamine-aminated carbon nanotubes; Step 4, melting the styrene-maleic anhydride-grafted polyethylene polyamine-aminated carbon nanotubes with ABS to obtain a permanently antistatic ABS composite material. This preparation method uses polyethylene polyamine to aminate carbon nanotubes, improving the antistatic effect and mechanical properties of the ABS composite material.

A waterborne resin crosslinking agent containing a predetermined polycarbodiimide compound (A) having an oxyalkylene group, a predetermined polycarbodiimide compound (B), and a surfactant (C), each polycarbodiimide compound has a structure in which an isocyanate group is capped with a predetermined end-capping compound at each of both terminals, a total content of the oxyalkylene group in (A) is 15% by mass or more, a total content of the oxyalkylene group in (A) and (B) based on a total amount of (A) and (B) is 10% by mass or less, and a content of (C) is 0.1 to 20 parts by mass based on a total content of (A) and (B) of 100 parts by mass.

The present invention relates to a hair coloring process comprising: a) applying to the hair at least one composition T comprising at least one agent AA selected from amino acids and their derivatives; then b) applying to the hair at least one composition C comprising: - at least one (poly)carbodiimide compound; and - at least one coloring agent selected from pigments, direct dyes, and mixtures thereof.

Examples present disclosure relate to a separator for a rechargeable lithium battery, and a rechargeable lithium battery including the separator, and include a separator for a rechargeable lithium battery including a porous substrate, and a coating layer located on at least one surface of the porous substrate. The coating layer includes a cross-linked product of a binder, a cross-linking agent, and carboxyalkyl cellulose or a salt thereof, and a filler. The binder includes a (meth)acryl-based binder including a structural unit derived from (meth)acrylate or (meth)acrylic acid, a cyano group-containing structural unit, and a sulfonate group-containing structural unit. The cross-linking agent includes one or more of an aziridine-based cross-linking agent and a carbodiimide-based cross-linking agent.

This invention relates to a method for preparing a wide-temperature-range nylon composite material resistant to ethylene glycol corrosion, comprising the following steps: S1, pre-structuring treatment of functional additives: S11, pre-reacting sulfonated polyether ether ketone with a reactive compatibilizer in a twin-screw extruder at a reaction temperature of 220-240℃ to obtain a surface-modified anti-swelling additive A; S12, encapsulating and granulating a carbodiimide hydrolytic stabilizer with a hot-melt coating material in a low-temperature extruder to obtain a microencapsulated hydrolytic stabilizer B; S2, staged sequential blending; S3, gradient structure construction and curing. This invention, through pre-structuring treatment of functional additives, staged sequential blending, and gradient interface construction, prepares a nylon composite material resistant to ethylene glycol corrosion and exhibiting excellent mechanical properties over a wide temperature range.

This invention relates to the field of biomedical technology, specifically to an antifungal nanoparticle, a combination drug, and its application. The antifungal nanoparticle is prepared by covalently linking the aptamer AU1 to drug-loaded silk fibroin nanoparticles via amide bonds. The mass ratio of the drug-loaded silk fibroin nanoparticles to the aptamer AU1 is 20:0.5~2.0. The antifungal nanoparticles of this invention are prepared by a desolvation method using voriconazole-loaded silk fibroin nanoparticles, and the targeting aptamer AU1 is attached to their surface using a carbodiimide chemical cross-linking method. This allows for specific recognition of Candida albicans, increasing drug accumulation at the infection site. Further combination with methylene blue-mediated photodynamic therapy can disrupt biofilm structures, enhance nanoparticle penetration, achieve synergistic bactericidal activity, and reduce systemic toxicity, providing a novel, highly effective, and low-toxicity treatment strategy for fungal biofilm infections.

The application belongs to the technical field of paint preparation, and provides polyester resin powder paint with high salt mist corrosion resistance and a preparation method thereof.The powder paint is composed of a carboxyl functional polyester resin, a hydroxyalkylamide curing agent and / or trisglycidyl isocyanurate to form a film forming system, and is matched with titanium dioxide, inorganic fillers, acrylate leveling agent, benzoin and wax powder;quaternary ammonium poly-p-vinyl pyridine microgel is introduced into the paint, and double-particle-size microcapsules are added;the microcapsule core layer contains hydroxyl-terminated polydimethylsiloxane, mercaptobenzothiazole corrosion inhibitor components, polycarbodiimide and phthalate plasticizer, the shell layer is a polyurea inner shell and a polydopamine outer shell and contains a disulfide bond structure, an epoxy silane hydrolysis and condensation layer is arranged on the outer layer and loads the microgel.

A resin mixture which includes a resin of a recycled material or a resin of a virgin material and carbon black added to the resin and can make a biaxially oriented molded article by a stretch blow molding method. A resin mixture includes a binder resin, carbon black and a compound having a carbodiimide group. The mass of the carbon black is 1.0 part by mass or more and 20.0 parts by mass or less, and the mass of the compound having a carbodiimide group is 3.0 parts by mass or more and 64.0 parts by mass or less, based on 100 parts by mass of the binder resin.

The present invention relates to a process for colouring hair keratin fibers, in particular the hair, comprising the application of a composition A and a composition B to said hair keratin fibers, in which: composition A comprises at least one (poly)carbodiimide compound, and composition B comprises: at least one associative polymer; and at least one compound, different from the associative polymers, containing at least one carboxylic acid group; at least one compound, preferably at least two compounds, containing at least one hydroxyl function; composition A and / or composition B comprising at least one colouring agent chosen from pigments, direct dyes and mixtures thereof; and in which composition A and composition B are applied simultaneously or sequentially to the hair keratin fibers. The present invention also relates to a device for colouring hair keratin fibers.

This invention belongs to the field of resin preparation technology, specifically relating to a polyphenylene sulfide resin and its preparation method. The preparation method includes the following steps: a composite stabilizer, anhydrous sodium sulfide, and a polar solvent are first mixed; the resulting first mixture undergoes a dehydration reaction to obtain a dehydrated reaction solution; the dehydrated reaction solution is then mixed with p-dichlorobenzene; the resulting second mixture undergoes prepolymerization and postpolymerization sequentially to obtain the polyphenylene sulfide resin; the composite stabilizer includes carbodiimide having the structure of formula I, lithium chloride, and sodium hydroxide; R 1 -(N=C=N) n -R 2 Equation I; n is an integer from 1 to 20; R 1 and R 2 The polymer is independently selected from substituted or unsubstituted alkyl, cycloalkyl, aryl, or aralkyl groups. The composite stabilizer in this invention effectively inhibits excessive hydrolysis by polar solvents, improves reaction efficiency, and controls the polymer molecular structure, thereby obtaining high molecular weight, high yield, and high whiteness PPS resin.

The present application provides a kind of powdered polycarbodiimide compound and its preparation method, resin composition and its application, powdered polycarbodiimide compound is represented by following general formula 1: In general formula 1, R1 and R3 represent the residue of organic compound with one functional group that can be reacted with isocyanate group [-NCO], R1, R3 are same or different;R2 represents the divalent residue of diisocyanate compound removed two isocyanate groups;X1, X2 represent the group formed by the reaction of the organic compound with isocyanate, X1, X2 are same or different;N represents the integer of 3-15.

The application discloses a heat-triggered water-based carbodiimide crosslinking agent composition and application thereof. By introducing a latent acid and setting an alkaline environment during storage, the hydrolysis of carbodiimide and the pre-reaction of carbodiimide and carboxyl are simultaneously inhibited from the kinetic aspect, and the system is 'frozen' in a stable state. When used, the latent acid is triggered to decompose by heating, and the system pH is suddenly reduced to acidity by instantaneous release of protons, which not only quickly protonates and activates the carbodiimide, but also creates an optimal kinetic window in which the reaction rate of carbodiimide and carboxyl is much faster than the hydrolysis reaction, thereby accurately, synchronously and efficiently guiding the reaction path to the target crosslinking direction, and realizing the unification of'stable storage' and 'on-demand efficient reaction' in a single component.

This invention relates to the field of composite catalyst technology, specifically to a method for preparing and applying a MOFs-based composite catalyst, comprising the following steps: dispersing modified MOFs and modified GO in a modified solvent, adding N,N'-dicyclohexylcarbodiimide and 4-dimethylaminopyridine; after the reaction, centrifuging to collect the precipitate, washing the precipitate with sufficient modified solvent and anhydrous ethanol, and finally washing with deionized water until the filtrate is clear to obtain a purified product; dispersing the purified product in methanol and refluxing to obtain the modified MOFs-based composite catalyst. This invention utilizes the bimetallic active sites of modified MOFs, the electronic conductivity of modified GO, and the uniformly dispersed structure formed with the assistance of the modified solvent to achieve a synergistic effect of adsorption-mass transfer-catalysis. The catalyst first rapidly adsorbs organic pollutant molecules through its porous structure, then achieves oxidative degradation of pollutants through efficient photogenerated carrier separation, and finally releases degradation products through unobstructed pores.

This invention discloses a low-temperature resistant high-elasticity rubber powder for asphalt and its preparation method, belonging to the technical field of rubber powder. Polyethylene glycol, 2,2,6,6-tetramethylpiperidine-1-oxy radical, sodium bromide, and sodium hypochlorite react to obtain carboxyl-terminated polyethylene glycol; the carboxyl-terminated polyethylene glycol and α-cyclodextrin are mixed and then reacted with adamantane, Carter's condensing agent, and N,N-diisopropylethylamine to obtain cyclodextrin-based polyrotaxane; the cyclodextrin-based polyrotaxane, sodium hydroxide, and 2,3-epoxypropyltrimethylammonium chloride react to obtain cationic cyclodextrin polyrotaxane; the cationic cyclodextrin polyrotaxane, lipoic acid, N,N'-dicyclohexylcarbodiimide, and 4-dimethylaminopyridine react to obtain disulfide-bonded polyrotaxane; the disulfide-bonded polyrotaxane is mixed and stirred with anhydrous ethanol and deionized water to obtain a modified polyrotaxane dispersion; waste rubber powder and the modified polyrotaxane dispersion are mixed and stirred to obtain high-elasticity rubber powder for asphalt.

This invention discloses a modified filler, an EVA material, its preparation method, an encapsulating film, and its applications. The modified filler comprises a filler matrix and modifying groups, wherein the modifying groups are derived from a modifier, and the modifier is one or more selected from carbodiimide, cationic surfactant, and carbodiimide-modified cationic surfactant; the modifying groups account for less than 50% of the mass percentage of the modified filler. The EVA material comprises EVA resin and a filler; wherein the filler is the modified filler and / or the filler matrix. The EVA material provided by this invention has an ion adsorption effect, which can reduce the ion migration rate and inhibit EVA aging, and has good anti-PID performance.

The application discloses a preparation method of water-soluble chitosan derivatives which can be used for chicken preservation. The method uses chitosan as raw material, introduces lysine groups through chemical modification, and significantly improves the water solubility and antibacterial activity of chitosan. The specific steps include: after chitosan is reacted with N,N'-dicyclohexyl carbodiimide and orthophosphoric acid, ethanol precipitation and suction filtration are carried out, then the chitosan is refluxed with lysine in PBS buffer (pH 4.5), finally sodium cyanoborohydride reduction, dialysis and freeze-drying are carried out, and water-soluble chitosan derivatives are obtained. The minimum inhibitory concentration (MIC) of the derivatives on staphylococcus aureus and escherichia coli is 3.90 mg / mL, the growth of microorganisms during the storage of chicken can be effectively inhibited, the increase of TVB-N value and pH can be delayed, the weight loss rate can be reduced, and the shelf life can be prolonged. The application solves the problems of poor water solubility and limited application of traditional chitosan, and provides an efficient and safe solution for natural food preservatives.

The present invention relates to a resin mixture, a preform, a biaxially stretch-molded article, a resin pellet, and a method for producing a biaxially stretch-molded article. A resin mixture includes a resin of a recycled material or a resin of a virgin material and carbon black added to the resin, and a biaxially stretch-molded article can be produced by a stretch blow molding method. The resin mixture includes a binder resin, carbon black, and a compound having a carbodiimide group. The mass of the carbon black is 1.0 mass part or more and 20.0 mass parts or less, and the mass of the compound having a carbodiimide group is 3.0 mass parts or more and 64.0 mass parts or less, based on 100 mass parts of the binder resin.

The invention relates to hydrolysis-stabilized polyethylene terephthalate (PET)- and / or polylactic acid (PLA)-containing compositions comprising monomeric carbodiimides of the formula (I)where R1, R2, R4 and R6=ethyl andwhere R3, R5 are each independently C1-C6-alkyl,and to processes for preparation of and to the use of these carbodiimides.

The application discloses a preparation method of a naphthomostat mesylate impurity standard substance, and specifically comprises the following steps: firstly, reacting m-aminobenzoic acid with a hydrochloric acid solution to obtain an m-aminobenzoic acid hydrochloride solution; then, adding a magnetic solid acid catalyst and a 20-30% mass concentration cyanamide aqueous solution, and stirring and reacting at room temperature under a pulse magnetic field to obtain 3-guanidinobenzoic acid hydrochloride; then, adding 3-guanidinobenzoic acid hydrochloride, 6-amidino-2-naphthol mesylate, N,N'-dicyclohexyl carbodiimide and a supported catalyst into pyridine, stirring and reacting at room temperature to obtain 6-amidino-2-naphthyl-3-guanidinobenzoic acid ester; and finally, salifying to obtain 6-amidino-2-naphthyl-3-guanidinobenzoic acid ester mesylate. The 6-amidino-2-naphthyl-3-guanidinobenzoic acid ester mesylate with high purity and high yield obtained by the application is of great significance for the quality research of naphthomostat mesylate.

This invention discloses an injectable antibacterial cellulose / rare earth-based hydrogel, its preparation method, and its application. The preparation method includes: S1, dissolving sodium carboxymethyl cellulose in a 2-morpholine ethanesulfonic acid solution, adding 1-ethyl-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide for a reaction in the dark, then adding L-histidine for a reaction in the dark at room temperature, and purifying the product after the reaction to obtain histidine-grafted carboxymethyl cellulose; S2, dissolving the product obtained in step S1, adding rare earth metal chloride or nitrate solutions dropwise to the solution and stirring, then allowing it to stand to obtain a homogeneous injectable antibacterial cellulose / rare earth-based hydrogel. The hydrogel prepared by this invention has excellent injectability, self-healing ability, shape adaptability, and antibacterial properties. It can achieve in-situ filling and sealing in irregular wounds, and promote tissue repair by inhibiting bacterial proliferation, alleviating inflammatory responses, and regulating the wound microenvironment.