20 results about "Carbamic acid esters" patented technology

The application discloses a hydrogen fuel engine oil composite additive composition, which comprises 3.0-5.0% high-alkali-value magnesium sulfonate, 12.0-20.0% low-alkali-value calcium sulfonate, 3.0-4.0% high-alkali-value calcium sulfide alkyl phenol, 2.0-5.0% amine type antioxidant, 2.0-5.0% phenol type antioxidant, 2.0-5.0% alpha-naphthylamine, 1.5-3.0% dibutyl dithiocarbamic acid ester, 1.5-3.0% anti-wear agent, 0.2-0.5% fatty amide, and the rest is ashless dispersant. The application further discloses a hydrogen fuel engine oil composition, which comprises 14.4-15.5% composite additive composition, 7.0-9.0% tackifier, 0.2-0.5% pour point depressant, and the rest is base oil. The composite additive improves the demulsification performance of the hydrogen fuel engine oil under high-temperature and high-pressure conditions, and further improves the water separation property and other comprehensive use performances of the oil product.

The invention discloses a high-toughness regenerated plastic dropper material based on a waste mulching film and a preparation method of the high-toughness regenerated plastic dropper material, belongs to the technical field of material regeneration, and is used for solving the technical problem that the tensile property and the impact resistance of a regenerated plastic dropper material in the prior art need to be further improved. According to the invention, a silica ion reinforcing component, boric acid ester modified regenerated polyethylene and hydroxyl carbamate flexible polyurethane are synergistically compounded, and a multi-scale structure system in which an inorganic-organic hybrid constraint structure, a dynamic reversible connection unit and a flexible dissipation channel are combined is constructed in the material; the material forms a stable interface coupling and continuous stress transfer path in the melting processing and service stress process, so that the material gives consideration to structural bearing, morphology stability and energy distribution capability, and is suitable for plastic dropper products with comprehensive requirements on mechanical properties and heat resistance.

The invention discloses a rosin-based ionic liquid adhesive and a preparation method thereof, and belongs to the technical field of adhesive materials. According to the invention, a rosin derivative is adopted as a raw material and is converted into a high-performance adhesive through a series of amidation, carbamic acid esterification, quaternization and anion exchange reactions. The adhesive prepared by the invention shows strong and long-acting adhesion performance on various base materials (metal, wood, glass, ceramic and the like), and the maximum adhesion strength can reach 13.77 MPa. Based on the temperature sensitive characteristic, the adhesive can still keep stable reversible adhesion after being recycled for 10 times, and has excellent solvent resistance, moisture resistance and flame retardance. The rosin-based ionic liquid adhesive prepared by the invention not only has a wide application prospect in the fields of heterogeneous material connection, cultural relic repair and the like, but also provides a sustainable strategy for developing a high-performance bio-based adhesive.

The invention provides natural gas engine oil and a composite additive composition thereof, and the composite additive composition comprises: a detergent comprising magnesium sulfonate, calcium sulfonate and sulfurized calcium alkyl phenolate; the antioxidant comprises an amine type antioxidant and a phenol type antioxidant; the anti-wear agent is prepared from carbamic acid ester, phosphoric acid lauryl amine salt and tricresyl ester; a dispersant; the base number of the magnesium sulfonate is 395 to 420 mgKOH / g, the base number of the calcium sulfonate is 20 to 35 mgKOH / g, and the base number of the sulfurized calcium alkyl phenolate is 130 to 160 mgKOH / g. According to the natural gas engine oil, the sulfate ash content of the natural gas engine oil can be reduced, and the natural gas engine oil has relatively good oxidation resistance, detergency, dispersity, wear resistance and the like.

The invention discloses a preparation method of (S)-(2-oxotetrahydrofuran-3-yl)-carbamate, which is characterized by comprising the following steps: S1, taking L-homoserine and dimethyl carbonate as reaction raw materials, and reacting in a methanol solvent under the action of a concerted catalytic system consisting of sodium ethoxide and zinc acetate to obtain a compound (1); s2, the compound (1) is subjected to a cyclization reaction under the acidic condition, and (S)-(2-oxotetrahydrofuran-3-yl)-carbamate is obtained. The preparation method provided by the invention does not use a large amount of acid-binding agent, has high use efficiency and low catalyst consumption, selects the amino protective agent with low price, reduces the cost and three wastes, and is beneficial to large-scale production.

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.

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 of (S)-(2-oxotetrahydrofuran-3-yl)-carbamate, characterized in that the method comprises the following steps: S1: taking L-homoserine and dimethyl carbonate as reaction raw materials, and performing reaction in a methanol solvent under the action of a synergistic catalytic system composed of sodium ethoxide and zinc acetate to obtain compound (1); and S2: performing a cyclization reaction on the compound (1) under an acid condition to obtain (S)-(2-oxotetrahydrofuran-3-yl)-carbamate. The preparation method does not use a large amount of an acid-binding agent, uses a catalyst with high efficiency and low dosage, selects an amino protecting agent with low price, reduces costs and three wastes, and is beneficial to scale-up production.

This invention discloses a liquid-phase functional urethane antifouling coating, its preparation method, and its application. The preparation method includes the following steps: S1. Mixing monohydroxy-terminated polydimethylsiloxane and polypropylene glycol and removing water to obtain solution A; S2. Dissolving hexamethylene diisocyanate trimer in xylene to obtain solution B; slowly adding solution B dropwise to solution A while continuously stirring; S3. After the addition is complete, heating the reaction to 80-85°C and continuously stirring to ensure a complete reaction, finally obtaining prepolymer C; S4. Adding curing agent polyaspartic acid ester, leveling agent, and defoamer to solution C, and stirring to obtain solution D; S5. Applying solution D to the surface of a substrate and curing at room temperature for 2 hours to obtain a liquid-phase functional urethane antifouling coating. The antifouling coating of this invention can cure at room temperature, is environmentally friendly, inhibits the adhesion of fouling organisms, and has good anti-icing properties.

The invention provides a seven-membered ring carbamate monomer, a multi-component polymer and a preparation method and application thereof, and relates to the field of polymer chemistry. Comprising the following steps: adding amino-alcohol II into a carbonate solution, then adding a reaction solvent, heating and stirring, removing the solvent after the reaction is finished, and purifying to obtain an intermediate product B; dissolving the intermediate product B in a reaction solvent, adding 0.1 M of a type I catalyst, stirring, and purifying to obtain a seven-membered ring carbamate monomer; the seven-membered ring carbamate monomer is subjected to ring-opening polymerization under the action of an organic solvent and a type II catalyst to form a seven-membered ring carbamate polymer, and the seven-membered ring carbamate polymer can also be converted into a monomer again under the action of a type III catalyst. The series of multi-component polymers are prepared through ring-opening polymerization of the single cyclic carbamate monomer, and the prepared series of multi-component polymers have the characteristics of simplicity and convenience in synthesis, adjustable structure, excellent performance and capability of being chemically recycled.

The application discloses a preparation method of functional waste edible mushroom residue-based vegan leather, and the vegan leather comprises, from outside to inside, a surface layer, a foaming layer, a bonding layer and a base layer; the mushroom residue is subjected to demethylation and boron crosslinking modification, phenolic hydroxyl groups converted from methoxyl groups are reacted with isocyanate in bio-based waterborne polyurethane to form phenolic carbamic acid ester bonds, and the interface interaction between the mushroom residue and resin is improved; crosslinking of boron compounds and phenolic hydroxyl groups inhibits the agglomeration of mushroom residue particles, and the flame retardant property of the vegan leather is improved; meanwhile, borate anions are complexed with phenolic hydroxyl groups converted from methoxyl groups, and the two have a synergistic effect, which jointly influences the compatibility between the mushroom residue and resin, the breaking strength of the vegan leather, the flame retardant property and the ultraviolet radiation resistance; the modified mushroom residue is prepared into vegan leather by using bio-based polymers, the preparation process is energy-saving and consumption-reducing, the finished product is green, environment-friendly and degradable, and the use of petroleum-based synthetic leather is replaced.

The invention discloses application of an MOF-5 derived monatomic solvent in synthesis of 1, 6-dicarbamate, and relates to the technical field of green catalysis and organic synthesis. The method comprises the following steps: by taking an MOF-5 derived monatomic solvent as a catalyst, catalyzing hexamethylenediamine to react with carbamate in a carbon dioxide atmosphere to synthesize HDC. According to the catalyst, classic MOF-5 is used as a template, an M-Nx active center with highly dispersed metal monatomic is constructed through an auxiliary nitrogen source co-doping strategy, and the catalyst is used in a stable liquid form and has the characteristics of excellent mass transfer efficiency of homogeneous catalysis and easy separation of heterogeneous catalysis. The excellent performance of the MOF-5 template-based monatomic solvent in the HDC synthesis reaction is disclosed for the first time, the MOF-5 template-based monatomic solvent shows the catalytic activity far superior to that of a traditional solid catalyst, nearly 100% selectivity and excellent cycling stability, and a brand new catalytic system and process scheme are provided for green, efficient and low-cost synthesis of HDC.

The invention relates to the technical field of preparation of 1, 6-dicarbamate, in particular to an application of a zirconium-X diatomic solvent in synthesis of 1, 6-dicarbamate, which is characterized in that hexamethylenediamine and carbamate are subjected to transesterification in the presence of the zirconium-X diatomic solvent in a carbon dioxide atmosphere to generate the 1, 6-dicarbamate; wherein the carbon dioxide and the zirconium-X diatomic solvent jointly improve the selectivity of the reaction, improve the purity and yield of the 1, 6-dicarbamate, reduce the later purification treatment process, reduce the complexity and cost of the production process, and are extremely simple and convenient to operate, and easy for continuous production of the 1, 6-dicarbamate, and after the reaction is finished, the yield of the 1, 6-dicarbamate is greatly improved. The zirconium-X diatomic catalyst monomer dispersed in a liquid product can be separated and recovered through simple centrifugal operation, so that the catalyst is convenient to recycle, and the problems of low HDC synthesis efficiency and high cost are perfectly solved.

The present application relates to a kind of high-sulfur lead-zinc ore split flow and speed flotation high-grade zinc concentrate method, the method uses sodium carbonate, humic acid salt, yeast powder, sodium sulfide, sodium pyrosulfite One or several combinations of sulfur depressant Ts4, zinc collector LY consisting of N, N-dialkyl dithiocarbamic acid ester, hydrocarbyl dithiophosphoric acid sulfide ester, octanol and non-polar oil portion, the method of split flow and speed flotation is carried out for zinc dressing, in the presence of high sulfur, can not add lime or strong base, it is conducive to environmental protection requirement, while can reduce reagent dosage, save reagent cost, reduce zinc concentrate amount, reduce equipment use and maintenance cost, while being able to obtain high-quality high recovery rate zinc concentrate, reach the final goal of efficient recovery of zinc mineral.

An acrylic elastomer copolymer that is a copolymer of (A) an alkyl (meth)acrylate and / or alkoxyalkyl (meth)acrylate monomer, (B) an α,β-unsaturated carboxylic acid monomer, and (C) a (meth)acrylate monomer having a carbamic acid ester group represented by the general formula:(wherein R1 is a hydrogen atom or a methyl group, and R2 is a divalent aliphatic hydrocarbon group having 1 to 10 carbon atoms). A crosslinkable composition in which a crosslinking accelerator is compounded with the acrylic elastomer copolymer.

The application discloses a zinc-aluminum composite oxide catalyst and a preparation method and application thereof, and belongs to the technical field of catalytic materials and non-phosgene isocyanate preparation. The application solves the problems of high reaction temperature, low raw material concentration, many side reactions and insufficient catalyst stability in the process of preparing isocyanate by pyrolysis of carbamic acid ester. The zinc-aluminum composite oxide catalyst comprises a composite oxide of zinc and aluminum, and has a dual-phase heterogeneous structure of ZnO and ZnAl2O4 spinel. When the catalyst is applied to the preparation of 4-(4'-phenylaminomethylcarbamate) diphenyl methane isocyanate (MMI) and diphenyl methane diisocyanate (MDI) by vacuum thermal decomposition of diphenyl methane diamino methylcarbamate (MDC), the self-polymerization and condensation side reactions in the reaction process can be effectively inhibited by the synergistic effect of the ZnO phase and the spinel phase, the selectivity and yield of the target product are improved, and the catalyst has good mechanical stability and is easy to recycle and cyclically used.

The invention relates to the technical field of catalytic materials and green chemical synthesis, in particular to a method for catalytically synthesizing 1, 6-dicarbamate through a ZIF-8 derived monatomic solvent and the 1, 6-dicarbamate. The invention relates to a method for catalytically synthesizing 1, 6-dicarbamate by using a ZIF-8 derived monatomic solvent, which comprises the following steps: in the presence of a catalyst, reacting hexamethylenediamine with carbamate in a carbon dioxide atmosphere to synthesize the 1, 6-dicarbamate, wherein the catalyst is a ZIF-8 derived monatomic solvent, the ZIF-8 derived monatomic solvent contains a metal active center dispersed on a nitrogen-doped carbon carrier in a monatomic form, and the metal active center and a carrier nitrogen atom form an M-N4 coordination structure. The method for catalytic synthesis of 1, 6-dicarbamate through the ZIF-8 derived monatomic solvent is high in universality, and the catalytic performance can be finely adjusted by changing the metal type of the monatomic solvent.

The invention provides an electrolyte based on propylene carbonate and application, and belongs to the technical field of lithium ion batteries. Comprising a lithium salt, a non-aqueous organic solvent taking propylene carbonate as a main body and an additive, the additive is a cyclic thiamine ester type heterocyclic compound or an N-carbamic acid ester-3-sulfuryloxy substituted pyrrolidine compound, and the mass percentage content of the additive in the electrolyte is not less than 2%. The electrolyte is a propylene carbonate system, the additive reacts on a graphite interface before the solvent and forms a compact and stable interfacial film, and the interfacial film takes sulfate / sulfite and other inorganic salt components as main components and participates in construction along with nitrogen-containing organic residues, so that the co-intercalation side reaction of propylene carbonate is inhibited, the structural damage of graphite is reduced, and the service life of the electrolyte is prolonged. The electrolyte provided by the invention is applied to the secondary battery such as a lithium battery, and the problems that the propylene carbonate is easy to co-embed on a graphite negative electrode, so that the graphite is stripped and cannot be circulated are well solved.

The application provides a semiconductor photoresist stripping liquid and a preparation method thereof, and relates to the technical field of semiconductor chip manufacturing. The semiconductor photoresist stripping liquid is composed of the following components: organic amine, corrosion inhibitor additive and polar organic solvent. The corrosion inhibitor additive is obtained by mixing isopropyl N-phenyl thiocarbamic acid ester and methyl salicylate. The mass ratio of the isopropyl N-phenyl thiocarbamic acid ester to the methyl salicylate is greater than or equal to 2. The corrosion inhibitor additive is based on the mixing mechanism of isopropyl N-phenyl thiocarbamic acid ester and methyl salicylate, and a protective film formed on the surface of the substrate can make the corrosion rate of the aluminum layer less than or equal to 0.8 Å / min and the corrosion rate of the silver layer less than or equal to 0.5 Å / min, thereby significantly improving the protection effect of the substrate.

The application provides a composite flotation reagent, a preparation method and application. The preparation method comprises the following steps: dissolving alkyl thiocarbamic acid ester in anhydrous ethanol, and adding a sulfonate surfactant and appropriate concentrated sulfuric acid to perform a sulfonation reaction; adding a polycarboxylic acid modifier into a mixed system containing the sulfonation reaction product, so that the polycarboxylic acid modifier and the sulfonation reaction product perform a grafting reaction; adding a mercaptan functional group assistant containing a sulfur into a mixed system containing the grafting reaction product, stirring and mixing uniformly, then adding appropriate stabilizers, and obtaining the composite flotation reagent after aging of the mixed system. Through sulfonation treatment of the main collector alkyl thiocarbamic acid ester, water solubility is improved, and polycarboxylic acid modification is realized. Meanwhile, resistance to mud and magnesium is realized, and the mercaptan assistant is used for strengthening collection. Finally, a high-selectivity, high-magnesium-resistant and micro-fine-grain special composite flotation reagent for copper and cobalt ore is formed.