83 results about "Disulfide compound" patented technology

The invention discloses a dual-band acridine formic acid anthracene methyl ester photocatalyst as well as a preparation method and application thereof, and belongs to the field of heterocyclic compounds. The invention designs and synthesizes a novel acridine formic acid anthracene methyl ester photocatalyst, which has good compatibility in two wavebands of 365 nm and 405 nm, can realize photocatalysis of disulfide compounds and aryl formyl peroxide compounds, and provides a new thought for preparation of sulfoxide compounds with asymmetric structures; the reaction conditions are mild, the reaction time is short, the photocatalyst can be recycled, the circulation loss is low, the circulation efficiency is high, the production efficiency is greatly improved, and the production period and cost are reduced; the product is free of transition metal residues and high in yield.

The invention belongs to the technical field of epoxy resin, and particularly relates to double-dynamic-bond synergistic exchange epoxy resin as well as a preparation method and application thereof. The preparation method of the double dynamic bond synergistic exchange epoxy resin comprises the following steps: adding aromatic dialdehyde and amino-containing disulfide into a solvent for condensation reaction, and filtering and drying to obtain a double dynamic bond curing agent; the preparation method comprises the following steps: adding the double-dynamic-bond curing agent into epoxy resin, carrying out ring-opening addition reaction, carrying out gradient heating curing, and cooling to room temperature, the aromatic dialdehyde is terephthalaldehyde, isophthalaldehyde or o-phthalaldehyde, and the amino-containing disulfide is 2, 2 '-diaminodiphenyl disulfide or 4, 4'-diaminodiphenyl disulfide. The invention designs and synthesizes a double-dynamic covalent bond curing agent containing an imine bond and a disulfide bond, and is used for constructing a novel degradable and self-healing epoxy resin. The material maintains good thermal stability and insulation performance, and realizes degradation and self-healing functions at the same time.

The invention discloses a double dynamic bond self-repairing polyurethane elastomer as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The elastomer is prepared from the following raw materials in percentage by mass: 74 to 76 percent of polyether polyol, 15.5 to 18 percent of diisocyanate, 1.67 to 7 percent of dihydrazide compound and 2.1 to 6.7 percent of disulfide. The preparation method comprises the following steps: firstly, reacting polyether polyol with diisocyanate to obtain a prepolymer, then sequentially carrying out step-by-step chain extension reaction on the prepolymer, the bishydrazide compound and the disulfide compound, and finally, curing and forming. According to the invention, a synergistic structure of a hydrogen bond hard segment and a disulfide bond soft segment is constructed step by step, so that the material has high mechanical properties and efficient self-repairing capability. The elastomer is suitable for the fields of industrial pipeline sealing pieces, flexible packaging films, sports equipment accessories and the like, and solves the problem that the strength and repairing performance of an existing self-repairing polyurethane material are difficult to balance.

The invention discloses a quantitative detection method for a mixture of bis (2-hydroxyethyl) disulfide and mercaptoethanol, and relates to the field of analysis and detection. The testing method comprises the following steps: respectively preparing a bis (2-ethoxyl) disulfide standard solution and a mercaptoethanol standard solution with different concentrations; and quantitatively measuring the standard solution and the detection sample through gas chromatography equipment, optimizing chromatographic conditions, drawing a standard curve according to the detection result of the standard solution, and quantitatively analyzing the detection sample by combining the standard curve and the spectrum of the standard solution. According to the present invention, the gas chromatography conditions are optimized, the phenyl functional group-containing polysiloxane is selected as the filler of the chromatographic column, and the detection temperature and the temperature rising program are controlled so as to ensure the separation and the detector sensitivity, and the split ratio is controlled to avoid the non-linear response and the peak overlapping; the detection accuracy of the bi-component bis (2-ethoxyl) disulfide and mercaptoethanol is high, the chromatographic peak separation degree is good, and the product quality detection requirement can be met.

The phenylenediamine-based antioxidant is used as a substitute for 6PPD, while improving scorch resistance and heat aging resistance. [Solution] The rubber composition according to the embodiment comprises a rubber component, a phenylenediamine-based antioxidant represented by the following formula (1), and a thiuram disulfide-based vulcanization accelerator. In formula (1), R 1 and R 2 Each of these independently represents a hydrocarbon group having 6 or more carbon atoms, however, R 1 and R 2 Except when it is a combination of a phenyl group and a 1,3-dimethylbutyl group. [Formula 1] JPEG2026103949000010.jpg42129

An oral care composition is provided and includes a natural flavor extract, a sulfur source such as dimethyl disulfide, a stannous ion source, and a soluble metal ion source that prevents the formation of methyl mercaptan. The natural flavor extract may contain dimethyl disulfide as an impurity. The soluble metal ion source may include a metal salt, a metal oxide, or a combination thereof, and the soluble metal ion source may include a copper ion source, a silver ion source, a zinc ion source, or combinations thereof.

This invention discloses a method for preparing high-purity Si-75, comprising: S1, adding sodium sulfide, sulfur, and deionized water in a molar ratio of 1:(1.0~1.1):(5~8) to a reaction vessel, adding a buffer, and reacting at 80~90℃ for 1~2h; S2, adding a phase transfer catalyst and a hydrolysis inhibitor to the system, adding γ-chloropropyltriethoxysilane dropwise, and reacting at 85~95℃ for 3~5h, allowing the mixture to stand and separate into layers after the reaction, to obtain an organic phase; S3, subjecting the organic phase to short-path distillation and then filtering to obtain high-purity Si-75. Compared with existing technologies, this invention uses a phosphorus-free buffer system, which simplifies waste treatment. It uses water as the reaction medium and does not use large amounts of organic solvents, making it suitable for continuous industrial production. By adding hydrolysis inhibitors, hydrolysis can be effectively prevented during the reaction, increasing safety. The short-path distillation method provides high purification efficiency and can quickly remove impurities. The product has a disulfide content of ≥98.5% and a color of 0 (Gardner color number), which is of great significance to the light-colored rubber industry.

The present invention relates to the use of a trivalent chrome plating bath composition for the electrodeposition of a hard chrome layer with a thickness of 1 µm or more, the composition comprising (A) trivalent chromium ions in an amount of 5-40 g / l, (B) at least one anion selected from sulfate, chloride, bromide and methanesulfonate, (C) at least one carboxylate ion selected from formate and acetate, (D) at least one buffer substance selected from ammonia, boric acid, carboxylic acids with 2 to 8 carbon atoms other than component (C) and salts thereof, and aluminium salts, and (E) 0.01 to 100 g / l of at least one specific compound which comprises a sulfonate group and a sulfide or disulfide group. Other aspects of the invention relate to a hard chrome plating process, a hard chrome plating layer and a hard chrome plated article.

The present application relates to the technical field of medicine, in particular to a kind of siRNA eye drop for penetrating mucus barrier and cell barrier and preparation method thereof.Innovative development side chain guanidino group-containing polydisulfide delivery carrier is used in the present application, through the quick dynamic disulfide exchange reaction between polydisulfide and sulfhydryl on mucin, tear film retention and efficient penetration are realized, and cationic polydisulfide is quickly adsorbed on the surface of negative charged cell membrane by electrostatic interaction, the quick dynamic disulfide exchange reaction between polydisulfide and sulfhydryl on cell membrane is used, and endocytosis is used to quickly penetrate tight junction cell layer.

The disclosure relates to solid and liquid compositions for reducing lactation, improving health, reducing the risk and or occurrence of intramammary infections, dry-off related stress, dry-off related inflammation, and / or dry-off related infections. A preferred compound is di-n-propyl disulfide.

This invention discloses a method for synthesizing disulfide ether compounds using visible light-emitting two-dimensional olefin nanomaterials in synergistic catalysis. The method involves mixing a thiol-containing compound with a suitable solvent, and then, under mild light conditions in the presence of a catalytic amount of two-dimensional olefin nanomaterials, achieving efficient disulfide bond construction to obtain a series of disulfide ether compounds. This invention enables the efficient synthesis of disulfide ether compounds. The catalyst used is simple to synthesize, requires low dosage, and is inexpensive. It achieves efficient conversion under mild light conditions, reducing reaction costs and simplifying post-processing steps. The synthesis reaction in this invention can be carried out at room temperature and pressure without any additional additives, exhibiting mild conditions, rapid reaction, and high yield.

The invention relates to a C4 hydrocarbon fraction fine desulfurization method and a reaction device. The C4 hydrocarbon fraction fine desulfurization method comprises the following steps: (1) mixing an oxidant with naphtha to obtain oxidant carrying oil; (2) mixing the C4 hydrocarbon fraction with the oxidant carrying oil, then adding a mercaptan conversion auxiliary agent, entering an oxidation reactor to be in contact with an oxidation catalyst to carry out oxidation reaction, and converting mercaptan into disulfide; and (3) carrying out rectification separation on the material flow after the oxidation reaction to obtain a fine desulfurized C4 hydrocarbon fraction and sulfur-containing naphtha. According to the method provided by the invention, the safety of the C4 hydrocarbon fraction oxygen dissolving process is improved by virtue of the oxidant carrying oil, the boiling point difference between sulfide and C4 hydrocarbons is increased by virtue of the mercaptan oxidation reaction, the fine desulfurized C4 hydrocarbon fraction with the total sulfur content not greater than 1mg / kg is obtained by adopting a rectification method, and a high-quality raw material can be provided for chemical utilization of the C4 hydrocarbon fraction.

The invention discloses a preparation method and application of a sulfur-doped carbon-coated silicon-carbon negative electrode material, and belongs to the technical field of battery materials. The preparation method comprises the following steps: (1) carrying out ball milling on micron silicon, zirconium beads, ethanol and an etching agent; (2) dissolving a lignin derivative and disulfide in a solvent to prepare a dispersed mixed solution; (3) carrying out ball milling on the nano silicon slurry and the dispersed mixed solution; washing the product with absolute ethyl alcohol, and dissolving in a solvent; and (4) carrying out spray drying on the obtained product, then adding asphalt, and carrying out carbonization in an inert atmosphere. The sulfur-containing doped carbon coating layer silicon-carbon negative electrode material prepared by the invention has good toughness and strength, and when volume expansion of silicon occurs in a charging and discharging process, the carbon layer is not easy to separate from a silicon core, and volume change can be more effectively restrained and buffered, so that the integrity of an electrode structure is maintained, and the cycle life is remarkably prolonged.

The present invention is directed to a method of selectively reacting and removing disulfides and reducing corrosivity in petroleum matrixes with an acid wash composition.

The application discloses a kind of ultrafast metal-free and solvent-free preparation method for preparing symmetric and asymmetric disulfide, which comprises the following steps: at room temperature, raw material R-SH, R'-SH and oxidant and base are added to reaction bottle, shake rapidly for 10-30 seconds, and R-S-S-R' is prepared after the reaction product is purified;Wherein R in R-SH is aliphatic or aromatic group, R' in R'-SH is aliphatic or aromatic group;R in R-SH and R' in R'-SH are same or different;The aromatic group has substituent or no substituent, and the aliphatic is straight chain or has branch;The oxidant is chloroform, and the base is N, N-diisopropylethylamine (DIPEA).The method is simple in operation, high in yield (60-99%), ultrafast in reaction kinetics, greatly improves production efficiency, wide in applicability, avoids the use of organic reaction solvent, raw material is cheap and easy to obtain, and does not contain residual metal and other sticky contaminants from reagent and ligand, provides a safer and more effective method for the synthesis and production of symmetric and asymmetric disulfide-containing compounds.

The disclosure relates to organosulfur compounds and compositions comprising same. In particular, the disclosure relates to Bis(4-fluorophenyl) disulfide, Bis(4-chlorophenyl) disulfide, Bis(4-chlorophenyl) thiosulfinate, Bis(4-fluorophenyl) thiosulfinate, Bis(4-chlorophenyl) thiosulfonate, Bis(4-fluorophenyl) thiosulfonate, and Di-isopropyl thiosulfonate. Such compositions are useful for treating microbial infection, in particular bacterial, fungal, rotozoan or algal infection. Compositions comprising said compounds are also provided for cleaning, disinfecting or agricultural use.

The invention relates to cationic cyclic oligomeric disulfide as well as a synthesis method and antimicrobial application thereof, and belongs to the technical field of chemical synthesis. The synthesis method provided by the invention comprises the following steps: carrying out primary reaction on a monomer M and an acid solution in a solvent to obtain an intermediate M '; pKa of acid in the acid solution is less than 3, and the monomer M conforms to a specific general formula (I); and S2, adjusting the system to enable the concentration of the acid to be greater than or equal to 0.25 mol / L, carrying out secondary reaction at 25-65 DEG C to obtain a reaction solution, and then carrying out drop precipitation and separation to obtain the cationic cyclic oligomeric disulfide. According to the synthesis method provided by the invention, the cationic cyclic oligomeric disulfide can be selectively obtained, and the product does not contain high-molecular-weight linear high-molecular-weight polydisulfide, so that the yield is high, the oligomer conversion rate is high, and the method is suitable for industrial production. Diversified modification of cation types is beneficial to further research, development and preparation of broad-spectrum antimicrobial agents capable of resisting fungi and mixed bacterial infection.

This invention relates to a triboelectric nanogenerator and its preparation method, belonging to the technical field of triboelectric nanogenerators. The preparation method includes the following steps: S1, dispersing styrene-ethylene-butene-styrene block copolymer, polyvinylidene fluoride, and MXene nanomaterials in a mixed solvent to obtain a negative friction layer spinning solution; S2, using dynamic pattern-induced multi-material nanofiber electrospinning technology, forming a negative friction layer from the negative friction layer spinning solution; S3, dispersing thermoplastic starch, sodium carboxymethyl cellulose, plasticizer, bis(2-hydroxyethyl) disulfide, and dithiothreitol in water to obtain a positive friction layer film-forming solution; S4, forming a positive friction layer from the positive friction layer film-forming solution; S5, bonding the micro-nano structures of the positive and negative friction layers face-to-face to obtain the triboelectric nanogenerator. This generator combines high output, long lifespan, and flexibility, and can be adapted to diverse scenarios such as wearable electronics, industrial high-temperature sensing, and environmental mechanical energy harvesting.

The utility model relates to the technical field of disulphide production, and discloses a disulphide purification device with a wastewater recovery structure, which comprises a primary reaction separation mechanism and a filtering separation mechanism, the primary reaction separation mechanism comprises a reaction kettle, and a stirring paddle is arranged at the central position in the reaction kettle; the upper end and the lower end of the annular outer side wall of the reaction kettle are each fixedly sleeved with an annular heater. According to the utility model, the wastewater recycling mechanism for deep treatment is additionally arranged, the wastewater collecting box connected with the wastewater discharge interface of the distillation tower is arranged, wastewater containing an extracting agent and a small amount of disulphide generated in the distillation process is collected, and the extracting agent recycling device is arranged and can be an activated carbon adsorber or a reverse osmosis membrane filter; the extraction agent in the wastewater is recycled, trace impurities in the wastewater are further removed, and the purity of the recycled water is improved, so that the recycled water meets the discharge standard or the water quality requirement for recycling.

The application provides a wearable thermoelectric generator with a self-healing function and a preparation method thereof, the preparation method adopts aluminum chloride solution as a dopant, and the thermoelectric performance of two-dimensional transition metal disulfide nanosheets is improved through electronic structure regulation. Since the S atoms on the surface of the disulfide are negatively charged, and the aluminum ions are positively charged, the positive and negative attract each other, so that the aluminum ions bind adjacent different disulfides together, thereby having better electrical properties. Even if a small amount of aluminum chloride solution is added, the electrical conductivity and the Seebeck coefficient can be simultaneously improved, the thermoelectric power is increased by 14 times compared with before modification, and better stability in temperature and relative humidity is maintained. Then, the n / p type thermoelectric material after modification is used to form a flexible thermoelectric device with a self-healing function. By using human heat, the device achieves an output voltage of about 15 mV, which is obviously improved compared with existing two-dimensional transition metal sulfide-based thermoelectric wearable devices, and is an important step for realizing practical application.

The application discloses a UV light-cured polymer material capable of repeated shaping, which comprises a photosensitive resin monomer or oligomer, a disulfide compound, a disulfide bond exchange promoter and a photoinitiator. The photosensitive resin can be easily polymerized in an ultraviolet light environment, and UV curing can be achieved. Meanwhile, a dynamic disulfide bond and a structure for promoting disulfide bond exchange are introduced into the system, and the dynamic disulfide bond can be quickly exchanged under certain conditions, so that the prepared orthopedic material has the repeated shaping capability. The polymer material can be used in the field of medical devices.

The invention belongs to the technical field of organic chemistry, and particularly discloses a polymonothiooxamide compound as well as a preparation method and application thereof. The structural formula of the polymonothiooxamide compound is shown in the specification, wherein n is any integer between 2 and 500. The preparation method comprises the following steps: mixing the polyamide disulfide compound, aliphatic diamine, organic alkali and an organic solvent, and reacting to obtain the polymonothiooxamide compound. According to the invention, large-scale preparation of the polymonothiooxamide compound can be realized, and the prepared polymer has excellent optical and mechanical properties.

A pharmaceutical composition comprising glutathione disulfide or pharmaceutically acceptable organic or inorganic salts thereof and glutathione disulfide S-oxide of the structure (I) or pharmaceutically acceptable organic or inorganic salts thereof for eliminating dose-related toxicity of pharmacologically active compounds and enhancing therapeutic activity of pharmacologically active compounds in the treatment of infectious and non-infectious diseases. Typically, the composition contains 0.01-10% of glutathione disulfide S-oxide by weight of the total composition, in addition to a metal (Me) in the form of a complexing compound containing Me-S-glutathione bond, said metal being selected from platinum group elements, typically platinum. The amount of d-metal complexing compound administered to a patient can be 10 ‑3 to 10 ‑15 mol / kg of body weight. The composition can be used in combination with pharmacologically active compounds, which are anticoagulants, factor Xa inhibitors, antibacterial or antiviral agents, to increase their therapeutic activity and eliminate dose-related toxicity.

The present invention provides a method for producing hemithioacetal derivatives with high yield, and a method for producing exocyclic olefin derivatives. [Solution] The method involves contacting a disulfide derivative represented by the following formula (I) with a reducing agent to produce an exocyclic olefin derivative. The reducing agent includes at least one selected from the group consisting of a metal-based reducing agent containing at least one metal selected from the group consisting of zinc, iron, palladium, and nickel; a silane-based reducing agent containing silicon; a reducing gas; a reducing inorganic salt; and a boron-based reducing agent containing boron. JPEG2026055675000040.jpg41120

This invention relates to a polymerizable disulfide, its preparation method, and its uses, belonging to the fields of polymer chemistry and photopolymerization. It is proposed based on the significant volume shrinkage inherent in LED free radical photopolymerization. The beneficial effects of this invention are that the disclosed polymerizable disulfide compound can reduce the volume shrinkage of 405nm LED light-induced free radical photopolymerization, while also possessing initiation and polymerization properties. Furthermore, this disulfide can improve the heat resistance of photocurable materials, showing great application potential in the field of LED photopolymerization.

This invention relates to the field of plastic coatings, aiming to solve the problem that existing coatings, after the appearance of microcracks, are difficult to repair and prone to further expansion of cracks. It provides a method for preparing a self-healing plastic coating, comprising the following steps: S100, mixing and reacting isophorone diisocyanate, polycarbonate diol, and bismuth neodecanoate to obtain a first prepolymer; S200, adding dimethylolpropionic acid and bis(2-hydroxyethyl) disulfide dissolved in a solvent to the first prepolymer, reacting to obtain a second prepolymer; S300, adding triethylamine to the second prepolymer, reacting, then adding deionized water, and finally adding an aqueous solution of ethylenediamine dropwise to obtain a self-healing plastic coating. This invention introduces dynamic disulfide bonds through bis(2-hydroxyethyl) disulfide and constructs a structure in which hard segment micro-regions with sufficient mechanical strength are dispersed in a freely moving soft segment matrix. This allows the disulfide bonds to contact and exchange after the material is damaged, achieving self-repair.

Examples of a biocide composition include an activated halogen compound selected from the group consisting of 2,2-dibromo-3-nitrlopropionamide; 2-bromo-2-nitropropane-1,3-diol; and 1,2-dibromo-2,4-dicyanobutane; benzisothiazolin-3-one; a pyridine-N-oxide selected from the group consisting of zinc pyrithione and sodium pyrithione; and a carbamate derivative selected from the group consisting of 3-iodo-2-propynyl butyl carbamate; zinc bis(dimethyldithiocarbamate); and bis(dimethyl carbamoyl) disulfide.

Disulfide-containing benzoxazine monomers of formula IAlso a process for synthesizing a disulfide-containing benzoxazine monomer of formula I comprises the following steps consisting of providing a mixture comprising an amino disulfide compound:H2N—R—NH2, wherein R is as defined for the monomer of formula I, an aldehyde derivative; phenolic derivatives, stirring the mixture under a temperature of from 50° C. to 130° C. for 1 h to 48 h, for obtaining the monomer of formula I; wherein the respective stoichiometry of the amino disulfide compound:aldehyde derivative:phenolic derivatives is 1:4:x1+x2, with x1+x2=2 and 0<x1;x2<2. Also a process for preparing a polybenzoxazine derivative vitrimer comprising a polymerization of the benzoxazine monomer at temperatures within the range of from 100° C. to 250° C. for 1 h to 24 h, for obtaining the polybenzoxazine derivatives vitrimer. Also polybenzoxazine derivative vitrimers, presenting at least one of the following characteristics of Tg values of from 0° C. to 250° C.; and relaxation temperature values, above the Tg values, of from 0° C. to 250° C.

This invention belongs to the field of polymer materials technology, and specifically relates to a PET composite material, its preparation method, and its application. By weight, the raw materials for preparing the PET composite material of this invention include 70-95 parts of polyethylene terephthalate, 0-15 parts of polybutylene terephthalate, 3-10 parts of toughening agent, and 0.2-1 parts of anti-crystallization agent; the anti-crystallization agent includes at least one of polyethylene glycol, polyacrylamide, and alkylphenol disulfide oligomers. The PET composite material of this invention has high transparency, fully displaying the color of the internal low-smoke halogen-free cable, with no visual color difference. It does not exhibit significant discoloration even after long-term exposure to outdoor light, greatly expanding its outdoor applications. The material has very low water absorption and good barrier properties, thus effectively maintaining the electrical performance of the cable.