55 results about "Thiocarbamate" patented technology

One aspect of the invention relates to a method for producing a plastic article or semi-finished product from a polymerizable mixture of isocyanates and isocyanate-reactive components, wherein the mixture comprises at least one photochromic dye, at least one surface additive, an isocyanate component and at least one of the following components: - a poly(thio)urethane prepolymer produced from isocyanates and isocyanate-reactive components, wherein the ratio of the two components is such that there is an excess of isocyanate-reactive groups in relation to isocyanate groups; - a poly(thio)urethane prepolymer produced from isocyanates and isocyanate-reactive components, wherein the ratio of the two components is such that there is an excess of isocyanate groups in relation to isocyanate-reactive groups; - a thiol component; wherein the mixture contains at least one photobase generator, a photochromic dye and a surface additive. Further aspects of the invention relate to a plastic article or a plastic article provided with an additional layer, each produced by a method according to another aspect of the invention, as well as a polymerisable mixture.

This invention proposes a lubricating oil composition for a four-stroke engine specifically designed for unmanned aerial vehicles (UAVs) and its preparation method. The lubricating oil composition for a four-stroke engine of this invention comprises the following components: (A) a nitrogen-containing organoboron compound; (B) an alkyl diphenylamine; (C) polyisobutylene succinimide; (D) sulfonates and / or sulfurized alkylphenol salts; (E) zinc dialkyl dithiophosphate; (F) dialkyl dithiocarbamate; (G) polymethyl methacrylate; and (H) a base oil in a major amount. The structure of the nitrogen-containing organoboron compound is shown in formula (I) and / or formula (II), with the definitions of each group provided in the specification. The lubricating oil composition for a four-stroke UAV engine of this invention exhibits excellent extreme pressure anti-wear, anti-oxidation, and detergency properties, effectively suppressing the increased wear caused by the high power-to-weight ratio and harsh lubrication conditions of four-stroke UAV engines.

Disclosed is a dual functional urease and nitrification inhibitor composition and method for inhibiting the hydrolysis of urea and nitrification of ammonia in soil. Methods of making the dual functional urease and nitrification inhibitor and / or a composition containing the dual functional urease and nitrification inhibitor are also disclosed.

One aspect concerns a process for producing a plastic body or semi-finished product from a polymerizable mixture of isocyanates and isocyanate-reactive components, wherein the mixture comprises at least one photochromic dye, at least one surface additive, an isocyanate component, and at least one of the following components: - A poly(thio-)urethane prepolymer prepared from isocyanates and isocyanate-reactive components, wherein the ratio of the two components is such that there is an excess of isocyanate-reactive groups compared to isocyanate groups; - A poly(thio-)urethane prepolymer prepared from isocyanates and isocyanate-reactive components, wherein the ratio of the two components is such that there is an excess of isocyanate groups compared to isocyanate-reactive groups; - a thiol component; wherein the mixture comprises at least a photobase generator, a photochromic dye and a surface additive. Other aspects concern a plastic body or a plastic body provided with an additional layer, each manufactured using a process according to a different aspect, as well as a polymerizable mixture.

A method for producing a fluoropolymer by solution polymerization or dispersion polymerization, the method including: in the presence of an initiator, a chain transfer agent, and a solvent, (i) homopolymerizing tetrafluoroethylene; or (ii) randomly copolymerizing tetrafluoroethylene and at least one of a monomer represented by the following formula (1) or a monomer represented by the following formula (2). The chain transfer agent includes at least one selected from dithioester compounds, dithiocarbamate compounds, trithiocarbonate compounds and xanthate compounds. The fluoropolymer contains 50 to 100 mol % of a polymerized unit based on the tetrafluoroethylene. The formula (1): CF2═CR1R2 wherein R1 and R2 are as defined herein, the formula (2): CH2═CR3R4 wherein R3 and R4 are as defined herein.

This invention discloses a flotation separation method for high-sulfur copper-zinc ore beneficiation, comprising the following steps: Step a. Classifying and grinding the high-sulfur copper-zinc ore, controlling the grinding fineness to ensure that the product particle size P80 is 120μm to 150μm; Step b. Performing a first-stage copper-zinc mixed flotation operation on the obtained grinding product: adding lime during the flotation process at a rate of 100g / t to 200g / t to adjust the pH value of the pulp to the range of 7.5 to 8.5, forming surface statics between chalcopyrite, sphalerite, and pyrite. Potential difference; an aerated flotation machine is used as the flotation equipment, and the selective collector O-ethyl-N-benzoyl thiocarbamate is added at a dosage of 25g / t to 30g / t for aerated flotation to obtain a copper-zinc-sulfur mixed concentrate; step c. the obtained copper-zinc-sulfur mixed concentrate is fed into a vertical spiral stirred mill for regrinding, and the regrinding fineness is controlled to P90≤20μm to achieve full mineral liberation and surface desorption; this invention can achieve precise separation of copper, zinc and sulfur, reduce costs and improve efficiency and increase the comprehensive utilization rate of resources.

The invention discloses a dithiocarbamate nickel (II) complex as well as a preparation method and application thereof, the chemical formula of the nickel (II) complex is [NiIILCl], and L is (E)-2-(phenyl (pyridine-2-yl) methylene) hydrazino methyl dithioformate. The nickel (II) complex is mild in synthesis condition and high in target yield. In-vitro MTT activity evaluation proves that the introduction of copper ions has a synergistic effect on the anticancer activity of the nickel (II) complex, so that the activity of the nickel (II) complex is improved from a micromole level to a nanomole level, and the amplification is as high as 200 times or more. Cell scratch experiments prove that the nickel (II) complex and copper (II) ions are combined for use, so that the migration resistance is achieved. A nickel (II) complex and copper ion combination strategy provided by the invention not only has a direct killing effect on cancer cells, but also can effectively inhibit the migration ability of the cancer cells, and shows huge application potential in the field of cancer treatment.

The present invention relates to a method for curing a polythiourethane transparent casting substrate, comprising the steps of: providing a first component A comprising a polythiourethane prepolymer having iso(thio)cyanate end groups, wherein the prepolymer is prepared from at least one polythiol monomer and at least one polyiso(thio)cyanate monomer, used in an amount adapted such that the molar ratio R2 of NCX groups to SH groups is in the range of 2 to 35; providing a second component B comprising at least one polythiol monomer; mixing the first and second components A and B together and filling the resulting polymerizable mixture into a molding cavity; and the weight The present invention relates to a method comprising the steps of curing a composite mixture to obtain a polythiourethane transparent substrate, wherein the prepolymer is prepared by mixing at least one polyiso(thio)cyanate monomer and at least one polythiol monomer in initial amounts such that the initial molar ratio R1 of the NCX groups / SH groups of the monomers is in the range of 0.3R2 to 0.95R2; polymerizing the mixture; and adding an additional amount of at least one polyiso(thio)cyanate monomer to the mixture such that the molar ratio of the NCX groups / SH groups of all monomers used in the preparation of the prepolymer is equal to R2, where X is O or S.

This invention relates to the field of mineral processing flotation reagents, specifically disclosing a high-efficiency collector for the flotation of sphalerite and its preparation method. The high-efficiency collector provided by this invention achieves synergistic enhancement of the functions of each component by compounding isopropyl xanthate, dialkyl dithiocarbamate, and mercaptoacetate, and introducing a designed and synthesized polymeric synergist. The three basic collector components together constitute a dense and stable primary hydrophobic adsorption layer. The introduced synergist, on the one hand, enhances the adsorption strength and selectivity on the surface of sphalerite through multiple functional groups; on the other hand, its grafted hydrophilic polymer chains can form steric hindrance at the mineral-water interface and regulate local hydrophilicity and hydrophobicity, thereby further optimizing the hydrophobic state of the mineral surface and inhibiting gangue inclusions. The composite reagent provided by this invention improves the recovery rate of useful minerals while ensuring concentrate quality.

The invention relates to a transparent dynamic covalent cross-linked polyurethane plate capable of being processed and remolded and a preparation method of the transparent dynamic covalent cross-linked polyurethane plate. The transparent dynamic covalent cross-linked polyurethane plate comprises the following raw material components: polyisocyanate, a polyol chain extender, a functional cross-linking agent, a solvent and a catalyst, the plate structurally comprises at least one of boric acid ester with a thermal stimulation response function, Diels-Alder reaction, thiocarbamate bonds, oxime urethane bonds, disulfide bonds, imine bonds and carbamate bonds. According to the invention, dynamic covalent bonds with thermal response characteristics are introduced into cross-linking points, and the cross-linked polyurethane plate with high transparency, high mechanical strength and reversible processability is constructed through interaction and synergy with rich hydrogen bonds in polyurethane.

HIGH-PERFORMANCE, REGULAR EXPANSION ELEMENTS FOR OIL AND GAS APPLICATIONS. The invention relates to a downhole sealing device, a well system employing a downhole sealing device, and a method of sealing within a borehole. The downhole sealing device, in one aspect, comprises one or more downhole sealing features and an elastomeric element comprising a thiourethane / acrylate polymer coupled to the one or more downhole sealing features. In at least one aspect, the elastomeric element can be used to be compressed in a downhole application against tubing as a seal.

A method of producing a thiourethane resin raw material, the method including comprising the step of generating the thiourethane resin raw material by reacting a thiourethane resin and an active hydrogen compound with each other.

This invention relates to the field of industrial lubricant additives, specifically to a novel multifunctional industrial oil compound, comprising, by weight, a sulfurized olefin extreme pressure anti-wear agent, a phenolic antioxidant, an amine antioxidant, a phosphate ester anti-wear agent, a boronized phosphorus-containing polyisobutylene succinimide dispersant, a thiocarbamate, dodecenyl succinic acid, and a metal deactivator; the weight ratio of the sulfurized olefin extreme pressure anti-wear agent to the phosphate ester anti-wear agent is 1.2:1 to 5:1; the number average molecular weight of the boronized phosphorus-containing polyisobutylene succinimide dispersant is 1000 to 3000. The novel multifunctional industrial oil compound provided by this invention, through scientific formulation design and optimized preparation process, effectively solves the technical defects of existing industrial oil compound agents and possesses multiple significant beneficial effects.

The present invention focuses on advancing perovskite solar cells (PSCs) by improving the management of ionic defects within the perovskite photoactive layer during both fabrication and operation. Traditional perovskite passivators tend to remain fixed on the surface after deposition, but perovskites are sensitive to environmental conditions that can alter their structure and create new defects. As a result, conventional passivators are often ineffective in addressing these changes. This innovation incorporates thiocarbamate bonds into the passivating molecules, allowing them to dissociate under high temperatures and release additional passivators to passivate newly formed defects.

The invention provides a lubricating oil composition and a preparation method thereof. The lubricating oil composition of the present invention comprises: (A) a viscosity index improver; (B) a thio phenolic ester type antioxidant; (C) a polyisobutylene succinimide; (D) sulfurized olefin; (E) a dialkyl dithiocarbamic acid salt and / or a dialkyl dithiocarbamic acid ester; (F) a phosphate ester; (G) a metal corrosion inhibitor; (H) a pour point depressant; (I) a lubricating base oil; wherein the viscosity index improver is a copolymer of methyl acrylic acid C8-C12 alkyl ester, methyl acrylic acid C13-C18 alkyl ester and N-vinyl imidazole. The lubricating oil composition disclosed by the invention has excellent extreme pressure anti-wear performance, viscosity-temperature performance, low-temperature flowing performance and dispersing performance, and is suitable for a wind power transmission system.

The application discloses a preparation method and application of a dithio-carbamate compound / polypolydithio-carbamate compound. The dithio-carbamate compound / polypolydithio-carbamate compound is obtained by reacting an amine compound, an isonitrile compound, carbon disulfide and a mercaptan compound in an organic solvent in the presence of a base. The raw materials used in the application are all industrial raw materials, which can be directly purchased and have low cost, and can be produced in a large scale of gram grade. The polymerization operation is simple, the yield is high, the reaction condition is mild, no metal catalyst is needed, the reaction can be carried out at room temperature and in the air, and no toxic and harmful by-products are generated. The polypolydithio-carbamate compound obtained by the application also has excellent mechanical properties and luminescent properties, and can be applied to the fields of mechanical materials and optoelectronic devices, thereby promoting the further development of the polypolydithio-carbamate compound.

This bile acid adsorbing agent composed of silica particles, to which an organosilicon compound represented by general formula (1) is bonded, has the advantage that water-absorption swelling does not occur.(In formula (1), R1, R2, and R3 each independently represent a hydrogen atom, a C1-C20 alkyl group, a vinyl group, a phenyl group, or a benzyl group, and R4 represents a group represented by general formula (2), provided that R1 and R3 may be bonded to each other to form a benzene ring.)(In formula (2), A represents a linear or branched divalent linking group which may contain a heteroatom, a urethane bond, a urea bond, a thiourethane bond, and / or a thiourea bond, R5's each independently represent a C1-C10 alkyl group or a C6-C10 aryl group, R6's each independently represent a C1-C10 alkyl group or a C6-C10 aryl group, and n represents an integer of 1-3.).

Thioesters, thiocarbamates, thiocarbazates, semithiocarbazates, peptides, aza-amino acid conjugates, and azapeptides; and a chemoselective and site-specific functionalization protocol of protected thiocarbazates and semithiocarbazates are described. The protocol features the use of Mitsunobu reaction to alkylate specifically the nitrogen atom close to the acylthiol moiety with alcohols to produce protected mono-substituted thiocarbazates that can be stored for months, activated under mild conditions at low temperature using halonium reagents and integrated orthogonally to make substituted semicarbazides that can be used, e.g., as synthons in synthesis of aza-amino acid conjugates, azapeptides and other peptidomimetics. Methods for preparing and using ureases, carbazides, semicarbazides, beta-peptides, azapeptides, and other peptidomimetics and azapeptide conjugates, and uses of ureases, carbazides, semicarbazides, beta-peptides, azapeptides in drug discovery, diagnosis, inhibition, prevention and treatment of diseases are also described.

The invention belongs to the field of construction of DEL libraries, and particularly relates to a method for preparing an On-DNA 2-hydroxydithiocarbamate structure compound. Comprising the step of reacting On-DNA secondary amine with carbon disulfide and an epoxy compound at a certain temperature and under a solvent condition to generate an On-DNA 2-hydroxydithiocarbamate structure compound. According to the preparation method disclosed by the invention, tens of thousands of compounds with On-DNA dithiocarbamate structures can be rapidly synthesized, the chemical space of On-DNA is enriched, and the diversity of On-DNA compounds is increased. In the field of new drug research and development, the high-throughput screening hit rate of biological targets can be improved, and the discovery efficiency and possibility of lead compounds are remarkably improved.

The invention provides a diesel engine lubricating oil composition and a preparation method thereof. The diesel engine lubricating oil composition of the present invention comprises: (A) a viscosity index improver; (B) a boronized ashless dispersant and / or a polyisobutylene succinate ashless dispersant; (C) sulfonate and / or sulfurized alkylphenate metal detergents; (D) zinc dialkyl dithiophosphate; (E) a dialkyl dithiocarbamate; (F) an amine type antioxidant; (G) a thiophenol ester type antioxidant; (H) lubricating base oil; wherein the viscosity index improver is a copolymer of methyl acrylic acid C8-C12 alkyl ester, methyl acrylic acid C13-C18 alkyl ester and N-vinyl imidazole. The diesel engine lubricating oil composition has excellent soot dispersion, wear resistance and high-temperature cleaning performance, and can meet the requirements of API CI-4, ACEA E4 and E7-grade high-performance diesel engine lubricating oil.

The present application relates to the technical field of self-repairing materials, in particular to a kind of six hydrogen bond self-repairing polyurea and preparation method thereof.A kind of brand-new six hydrogen bond structure is provided, and the lone pair of electrons of sulfydryl in the structure can form hydrogen bond with the hydrogen on amino group, and since the electronegativity of sulfur atom is less than that of nitrogen atom, the hydrogen bond energy formed is small, the material has stronger reworkability and repairability.Sulfur amidoester bond is designed and synthesized, compared with amidoester bond, sulfur amidoester has stronger reworkability and repairability due to containing lower-energy thio-carbamate bond.The high performance of self-repairing polyurea is maintained, and excellent self-repairing function is endowed.The advantages of both six hydrogen bond and sulfur amidoester bond are integrated, the material self-repairing threshold is further reduced, and the polyurea material with excellent mechanical properties, which can be self-repaired and reworked at room temperature, is successfully prepared.The mild self-repairing ability makes the material more widely used.

The application provides a solid-state electrolyte and a battery. The solid-state electrolyte comprises a polythiourethane, a polyacrylonitrile and a lithium salt, and the polythiourethane comprises a thiourethane structural unit. In the solid-state electrolyte provided by the application, the amino group in the thiourethane structural unit of the polythiourethane and the cyano group of the polyacrylonitrile form a hydrogen bond, so that the two have good compatibility. The blending of the polythiourethane and the polyacrylonitrile can effectively reduce the crystallinity of the polyacrylonitrile, improve the flexibility of the solid-state electrolyte, and at the same time make the solid-state electrolyte have good mechanical properties. In particular, the sulfur atom in the thiourethane structural unit of the polythiourethane helps to promote lithium ion transmission and improve ionic conductivity, and thanks to the interaction of the hydrogen bond formed by the polythiourethane and the polyacrylonitrile, the transmission rate of lithium ions can be further improved.

The invention belongs to the field of flotation reagent preparation, and particularly relates to a preparation method of allyl thiocarbamate, which comprises the following steps: carrying out substitution reaction on an aqueous solution containing water-soluble thiocyanate, allyl chloride and a phase transfer catalyst, then adding a water-insoluble organic matter, and separating to obtain an organic phase containing an allyl isothiocyanate intermediate; rOH and titanate are added into the organic phase, an addition reaction is carried out, and allyl thiocarbamate with the structure shown in the formula 1 () is prepared. Compared with the existing synthesis process of the allyl thiocarbamate, the process has the advantages that the step of removing water by reduced pressure distillation is omitted, the loss of the intermediate product allyl isothiocyanate in the distillation process is reduced, the separation time is saved, the whole preparation process is short in time and mild in condition, the yield of the allyl thiocarbamate is high, the production cost is low, and the process is more environment-friendly; the industrial production is facilitated.

To provide a grease composition for a constant velocity joint excellent in abrasion resistance and low friction property.SOLUTION: R1NH-CO-NH-C6H4-p-CH2-C6H4-p-NH-CO-NHR10 (1) wherein R1 and R10 are each independently octyls, decyls, dodecyls, tetradecyls, hexadecyls, octadecyls, oleyls or cyclohexyls; ) The grease composition for constant velocity joints comprises (c) a molybdenum dialkyldithiocarbamate, (d) a zinc dialkyldithiophosphate and (e) a zinc sulfonate.SELECTED DRAWING: None

Method for recycling polythiourethanes, thio compounds and their uses This paper describes a method for recycling polythiourethane. For this purpose, the polythiourethane is depolymerized in the presence of a difunctional or higher functional thiol. Difunctional and / or higher functional isocyanates, epoxides, or ethylenically unsaturated compounds are then added to the resulting monomer and oligomer mixture, optionally together with difunctional and / or higher functional thiols. The reaction mixture is then repolymerized. This method allows complete recycling of polythiourethane in a simple and practical manner.

Thioesters, thiocarbamates, thiocarbazates, semithiocarbazates, peptides, aza-amino acid conjugates, and azapeptides; and a chemoselective and site-specific functionalization protocol of protected thiocarbazates and semithiocarbazates are described. The protocol features the use of Mitsunobu reaction to alkylate specifically the nitrogen atom close to the acylthiol moiety with alcohols to produce protected mono-substituted thiocarbazates that can be stored for months, activated under mild conditions at low temperature using halonium reagents and integrated orthogonally to make substituted semicarbazides that can be used, e.g., as synthons in synthesis of aza-amino acid conjugates, azapeptides and other peptidomimetics. Methods for preparing and using ureases, carbazides, semicarbazides, beta-peptides, azapeptides, and other peptidomimetics and azapeptide conjugates, and uses of ureases, carbazides, semicarbazides, beta-peptides, azapeptides in drug discovery, diagnosis, inhibition, prevention and treatment of diseases are also described.

The invention relates to a self-repairing material vulcanization extreme pressure agent for preventing film damage and a preparation method thereof, and belongs to the technical field of self-repairing polymer composite materials. The extreme pressure agent comprises the following components: a disulfide bond functionalized polyborate-polysiloxane copolymer, a micro-crosslinked polythiocarbamate-zinc coordination polymer, sulfurized isobutylene, sulfurized olefin cottonseed oil and the like. The disulfide bond functionalized polyborate-polysiloxane copolymer is prepared by the following steps: hydroxyl-terminated polydimethylsiloxane and tributyl borate are subjected to a reaction to generate a prepolymer, and the prepolymer reacts with 2, 2 '-dithiodiethanol and p-toluenesulfonic acid to obtain the disulfide bond functionalized polyborate-polysiloxane copolymer. And the micro-crosslinked polythiocarbamate-zinc coordination polymer is prepared by reacting a thiol-terminated prepolymer with zinc acetate. The thiol-terminated prepolymer is prepared by carrying out a catalytic reaction on polytetrahydrofuran ether glycol and isophorone diisocyanate through dibutyltin dilaurate, and then carrying out a reaction with 2, 2 '-dithiodiethylamine and 3-mercapto-1-propanol.

To provide a high-pressure hose having excellent abrasion resistance, oil resistance, flame retardancy, scorch resistance, etc.　Provided is a rubber composition for a high-pressure hose outer surface containing the following components (A)-(F). Per 100 total mass parts of components (A)-(C), the content of component (A) is 40-55 mass parts, the content of component (B) is 40-55 mass parts, the content of component (C) is 5-10 mass parts, and the content of component (F) is 2-5 mass parts.　(A) Chloroprene rubber, (B) Butadiene rubber, (C) Acrylonitrile-butadiene rubber, (D) Sulfenamide vulcanization accelerator and / or thiazole vulcanization accelerator, (E) Dithiocarbamate vulcanization accelerator and / or thiuram vulcanization accelerator, and (F) sulfur