1513 results about "Carbamate" patented technology

An aqueous ultraviolet-absorbing resin emulsion, and an aqueous resin emulsion composition containing the emulsion is provided, wherein the emulsion is excellent in compatibility with a synthetic resin and light resistance. Also, the emulsion improves stability in blending with an aqueous emulsion of the synthetic resin, and prevents bleed out of the ultraviolet-absorbing resin on the surface of a coating film. Further, the aqueous ultraviolet-absorbing resin emulsion imparts excellent alkali or solvent resistance to a synthetic resin poor in alkali or solvent resistance. More specifically, an aqueous resin emulsion composition comprising (I) an aqueous ultraviolet-absorbing resin emulsion and (II) an other aqueous resin emulsion is provided, wherein the emulsion (I) is obtained by urethanizing (A) a polyol component having an ultraviolet-absorbing group {e.g., 1,1-bis[3-(2H-benzotriazol-2-yl)-4-hydroxy-benzeneethanol]methane}, (B) a polyol if necessary, (C) an alkyl or aryl dialkanolamine compound, and (D) an organic polyisocyanate in (E) an organic solvent, diluting the reaction mixture with (F) an organic solvent having a boiling point lower than 100° C. to give a resin solution, neutralizing the resin solution with (G) a neutralizing agent, and dispersing the resultant in water.

The present disclosure relates to compositions and methods for reversible fixation of biological samples using fixation reagents that form bis-carbamate crosslinks between amine-bearing moieties in biomolecules.

The invention provides a preparation method of a chain extender containing an imine bond and application of the chain extender in thermosetting polyurethane, and the preparation method comprises the following steps: under anhydrous and anaerobic conditions, mixing a reagent A and a reagent B, adding a solvent, reacting at 25-40 DEG C for 4-6 hours, cooling to room temperature, and carrying out rotary evaporation to remove the solvent to obtain the chain extender, wherein the reagent A is a derivative of benzene, one substituent group is an aldehyde group, at least one of the other five substituent groups is a hydroxyl group or an aldehyde group, and the reagent B is an organic compound containing both amido and hydroxyl group or an organic compound containing both amido and hydroxyl group. When the chain extender is used for preparing thermosetting polyurethane, imine bonds and carbamate bonds can be introduced into one monomer at the same time, so that the thermosetting polyurethane can maintain original excellent mechanical properties, solvent resistance and thermal stability, and also has self-healing and recyclable capabilities; the compatibility is good, and the performance and the application range of the thermosetting polyurethane are widened.

The invention discloses a composite collecting agent and a preparation method and application thereof, and relates to the technical field of solid waste recycling. The composite collecting agent comprises a main agent, an auxiliary agent and a synergist, and the mass ratio of the main agent to the auxiliary agent is (3-1): (1-2). The mass of the synergist is 0.1%-2.5% of the total mass of the composite collecting agent; the structural formula of the main agent is as shown in formula (I): R-O-C (= S)-NH-R '(I); in the formula (I), R is alkyl, and R'is 3-chloro-1, 2-epoxypropane; the auxiliary agent is a mercaptobenzothiazole derivative. The thiocarbamate and the mercaptobenzothiazole derivative are compounded according to a specific proportion for the first time, a Zn-S shielding layer is destroyed through an intermolecular synergistic effect, and the silver recovery rate is increased; the preparation method is simple and easy to operate, facilitates reduction of the dosage of a single agent and reduces environmental pollution. The foam stability is improved, the flotation efficiency is improved, the selective collection efficiency of the silver-zinc ore is remarkably improved, and the flotation index is improved.

The invention provides a piperazinyl steric hindrance type liquid-solid phase change carbon trapping agent and a preparation method thereof, and relates to the field of liquid-solid phase change trapping of CO2. Alkylamine and the like are used as raw materials, piperazinyl steric hindrance type organic amine with secondary amino and tertiary amino structures is designed, and the piperazinyl steric hindrance type organic amine is prepared through ring-opening addition, nucleophilic substitution, cyclization, hydrogenation and other reactions. The piperazinyl steric hindrance type organic amine is compounded with a solvent and a functional additive to prepare the piperazinyl steric hindrance type liquid-solid phase change carbon trapping agent. According to the steric hindrance type phase change carbon trapping agent, on the basis of the electron donating effect of alkyl, the absorption rate of trapping CO2 is increased by 2.2 times compared with that of traditional steric hindrance amine (AMP); on the basis of the steric hindrance effect of the tertiary amine site, the hydrogen-bond interaction between carbamate and the solvent is weakened, liquid-solid phase splitting after the aqueous solution carbon capture system absorbs CO2 is promoted, the problem of poor cycling stability of a non-aqueous solvent system is solved, and the capture efficiency and enrichment degree of CO2 are improved.

The invention discloses a composite sunscreen composition with excellent film-forming property and sunscreen stability as well as a preparation method and application thereof, and belongs to the technical field of daily chemicals. The composite sunscreen composition is prepared from inulin lauryl carbamate, bis (lauramide glutamine) lysine sodium, hydroxypropyl trimethyl ammonium chloride hyaluronic acid, an ammonium acryloyldimethyl taurate / VP copolymer, a sunscreen agent, basic grease, and cosmetically acceptable auxiliary materials and a solvent, the sunscreen emulsion prepared on the basis of the composition can quickly form a stable, light, thin and breathable sunscreen film on the surface of skin, solves the problems that a sunscreen agent in a traditional sunscreen product is non-uniform in agglomeration and dispersion, a formed film is rigid and airtight, the sunscreen effect is easy to lose due to sweating / friction, the skin feeling is poor and the like, and has the advantages of high sunscreen stability, excellent water resistance and good skin feeling; the method can be widely applied to preparation of skin care products with a sunscreen effect.

The present invention relates to novel carbamate hydrolases for the enzymatic decomposition of polyurethanes and to an enzymatic process for the complete decomposition of polyurethanes into defined monomers.

A photocurable resin composition for nails or artificial nails, contains the following components (A) to (D): a component (A): a urethane (meth)acrylate oligomer, a component (B): a monomer selected from the group consisting of a (meth)acrylate monomer, a (meth)acrylamide monomer, and (meth)acrylic acid (excluding the component (A)), a component (C): polyglycerol having no (meth)acryloyl group and / or a compound having a polyglyceryl ether skeleton having no (meth)acryloyl group, a component (D): a photoinitiator. A molecular weight of the component (C) is 200 or more.

The invention provides a single-component modified silane adhesive as well as a preparation method and application thereof. The adhesive is prepared by mixing the following components: silane modified polyether resin, silane modified polymer resin, a plasticizer, a composite light stabilizer, a filler, a rheological additive, a water removal agent, a coupling agent and a catalyst, the silane modified polyether resin is silane-terminated resin prepared by a hydrosilylation method; the silane-modified polymer resin is a silane-terminated polymer resin containing a urethane bond. The adhesive is excellent in comprehensive performance, the tensile strength of a body is larger than 3 MPa, the elongation at break is larger than 450%, the adhesive is high in adhesion universality to metal base materials, PET films, ceramics, glass, wood floors, PVC, PC, ABS, wood-plastic composite materials and paint faces, the base materials do not need to be specially treated, the damage form is cohesive failure, and the adhesive has good adhesion strength, tear resistance and excellent temperature resistance and is suitable for being applied to the field of wood products. After aging at 120 DEG C for one week, the tensile strength of the body is greater than 3 MPa, the elongation at break is greater than 430%, and the surface layer can be coated after curing.

The invention belongs to the technical field of detection methods, and particularly relates to a liquid chromatography detection method for an idedecalciferol intermediate and impurities thereof. According to the liquid chromatography detection method for the eldecalciferol intermediate and the impurities thereof, a liquid chromatography method is combined with an electrospray detector for detection; chromatographic conditions are as follows: an amylose-tri (3-chlorphenyl carbamate) covalently bonded silica gel chromatographic column is adopted; and carrying out gradient elution by taking water as a mobile phase A and acetonitrile as a mobile phase B. The method for detecting the eldecalciferol intermediate and the impurities of the eldecalciferol intermediate is good in specificity, high in sensitivity and accuracy, good in repeatability and stability and high in analysis speed, the content of the eldecalciferol intermediate and the impurities of the eldecalciferol intermediate can be rapidly and accurately detected, and the blank of detection of the eldecalciferol intermediate and the impurities of the eldecalciferol intermediate in the prior art is filled.

A crystalline polymorph of uric acid characterized by powder X-ray diffraction, Raman spectroscopy and 1H-NMR, the process to obtain said crystalline polymorph starting from ethyl (6-amino-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)carbamate, a pharmaceutical composition containing crystalline polymorph and its use in the prevention and treatment of a cerebrovascular disease.

The present disclosure discloses a medical hydrogel, formed by in-situ crosslinking an aldehyde-terminated multi-arm star polyethylene glycol and a polyamino compound, wherein the aldehyde group and the multi-arm star polyethylene glycol are linked by a chemical bond such as an ether bond, an amide bond, an ester bond, a urethane bond, an imine bond, or a urea bond, and the molar ratio of the amino in the polyamino compound to the aldehyde group in the aldehyde-terminated multi-arm star polyethylene glycol is 0.4-4.4:1. The polyamino compound is polylysine or a mixture of polylysine and polyethylenimine in a molar ratio of 2-30:3. The hydrogel of the present disclosure gels rapidly, has a long-term stability in an aqueous solution, and still has good swelling property and stability after a plurality of radiations, and thus can be used as a medical radiotherapy protection spacer for radiation protection.

The invention discloses a protective film for preventing precipitation of small molecules and a preparation method thereof, and relates to the technical field of protective films. The protective film comprises a base material layer, a functional layer stacked on one side of the base material layer and a protective layer stacked on the functional layer; wherein the functional layer comprises barrier S O2 with a fluorine-containing aluminate inorganic interface layer and a polyether amine organic interface layer; the protective layer comprises wear-resistant S C of which the surface is grafted with amino methyl ester groups; the double-layer interface of the functional layer can enhance the barrier effect and is beneficial to preventing precipitation of small molecules; a perfluoro chain segment in the protective layer can enhance hydrophobicity, a good waterproof effect is achieved, and the influence of the external environment on the base material is further avoided; and the carbamate group on the surface of the wear-resistant S C and the benzoxazine ring of the barrier S O2 are subjected to ring-opening copolymerization at a high temperature to form a covalent cross-linking interface, so that the bonding strength can be enhanced, the tensile property can be improved, and the service life of the protective film can be prolonged.

The invention discloses a supramolecular polyurethane prepolymer, supramolecular polyurethane prepolymer ink, a supramolecular polyurethane elastomer as well as a preparation method and application of the supramolecular polyurethane prepolymer. The structural formula of the supramolecular polyurethane prepolymer is as follows: # imgabs0 #; wherein m is 5-35, n is 6-28, and R is 2-acetyl benzene, phenyl or biphenyl. The supramolecular polyurethane prepolymer has multiple strong hydrogen bonds formed by allophanate bonds and carbamate bonds, microphase separation of soft and hard segments of polyurethane is promoted, the tightness of chain segment spatial conformation is increased by utilizing a planar structure of boron atoms, hydrogen bonds between the carbamate bonds are enhanced, and the microphase separation of soft and hard segments of polyurethane is promoted. The tensile strength, the thermal stability and the toughness of a 3D printed product are improved by virtue of multi-reinforcement coupling due to the dynamic characteristics of the boric acid ester bond, and the 3D printed product has excellent bearing capacity.

The invention provides a polyurethane antifouling paint, a preparation method thereof and a polyurethane antifouling coating, and belongs to the technical field of paints. The polyurethane antifouling paint comprises a cross-linkable part and a non-cross-linked resin part, wherein the cross-linkable part comprises a second prepolymer formed by reaction of polyether polyol, dihydroxyl long-chain quaternary ammonium salt and diisocyanate; the non-crosslinked resin part comprises linear or branched chain polyurethane grafted with a sterilizing agent, and the sterilizing agent comprises 3-iodine-2-propynyl-N-n-butyl carbamate. The polyurethane antifouling coating provided by the invention can provide a relatively long-acting antifouling effect in a fresh water environment, the dihydroxyl long-chain quaternary ammonium salt and the bactericide can inactivate protein in contact with the coating, and meanwhile, the reduced free energy on the surface of the polyurethane antifouling coating promotes desorption of surface fouling.

The invention provides a solid electrolyte and a battery. The solid electrolyte comprises polythionocarbamate, polyacrylonitrile and a lithium salt, wherein the polythionocarbamate comprises a thiocarbamate structural unit. In the solid electrolyte provided by the invention, amino groups in a thiocarbamate structural unit in the polythionocarbamate and cyano groups in polyacrylonitrile form hydrogen bonds, so that the polythionocarbamate and the cyano groups in the polyacrylonitrile have good compatibility, the crystallinity of the polyacrylonitrile can be effectively reduced by blending the polythionocarbamate and the polyacrylonitrile, and the flexibility of the solid electrolyte is improved; and meanwhile, the solid electrolyte has relatively good mechanical properties. Particularly, sulfur atoms in a thiocarbamate structural unit in the polythionocarbamate contribute to promoting lithium ion transmission and improving the ionic conductivity, and due to the interaction of hydrogen bonds formed by the polythionocarbamate and polyacrylonitrile, the transmission rate of lithium ions can be further improved.

The invention discloses acrylic photosensitive resin containing a carbamate group, a photosensitive resin composition and photosensitive solder resist ink, and relates to the technical field of photosensitive solder resist ink. The embodiment of the invention provides acrylic photosensitive resin containing a carbamate group. The acrylic photosensitive resin is prepared from the following raw materials: an acrylate copolymer with a side chain containing hydroxyl, an anhydride compound and an isocyanate compound, wherein the acid anhydride compound can react with part of hydroxyl on the side chain of the acrylate copolymer through an acid anhydride group to obtain acrylate grafted with the acid anhydride compound; the isocyanate compound can react with the residual part of hydroxyl on the side chain of the acrylate copolymer through the isocyanate group to obtain the acrylic photosensitive resin containing the carbamate group. When the acrylic photosensitive resin containing the carbamate group is used for photosensitive solder resist ink, the adhesion, heat resistance and flexibility of a dry film prepared from the photosensitive solder resist ink can be improved.

The invention discloses a self-cleaning polyurethane protective coating as well as a preparation method and application thereof. Hydrophobic nano silicon dioxide is modified by using an organic modifier, polyisocyanate is used as a curing agent, and both the hydroxyl-containing organic modifier and hydroxyl of a polyurethane prepolymer can chemically react with isocyanate groups in the curing agent; the hydroxyl-containing organic modifier can also chemically react with isocyanate groups of the polyurethane prepolymer to generate connection containing carbamate bonds and form a double-crosslinking network, so that silicon dioxide is introduced through chemical bonds, the cohesion of the coating is enhanced, and the self-cleaning performance and the corrosion resistance of the coating are improved.

The invention discloses a polyether polyurethane solid polymer, a preparation method thereof and application of the polyether polyurethane solid polymer in a solid electrolyte, and belongs to the technical field of polymer electrolytes and preparation of the polymer electrolytes. The problems that an existing solid polymer electrolyte is low in ionic conductivity and poor in interface stability are solved. According to the invention, polyether amine and cyclic carbonate are subjected to an in-situ polymerization reaction to synthesize a series of polyether polyurethane solid polymer electrolytes with different molecular weights and monomer proportions. The obtained polyether polyurethane solid polymer electrolyte contains rich carbamate groups, hydroxyl groups, fluorine ions and the like, and can form a strong reversible hydrogen bond network, so that the electrolyte has excellent mechanical properties, can be used as a self-supporting electrolyte membrane, and does not need an additional diaphragm. Meanwhile, a large number of dynamic reversible hydrogen bonds also enable the solid polymer electrolyte to have excellent self-healing ability, and can be self-repaired when the battery is damaged by external force in the operation process, so that the structural stability of the solid polymer electrolyte is remarkably improved.

The technology of the present disclosure generally relates to the field of power storage devices, and more specifically to a solid electrolyte, an electrode, a solid-state battery, and a method for producing the same. An aspect of the present disclosure relates to a process for producing a solid electrolyte, comprising the steps of: - contacting, in the presence of a catalyst: - a polymer precursor compound comprising polyethylene glycol (PEG) and / or polytetrahydrofuran (PTHF), wherein the polymer precursor compound comprises on average per polymer precursor molecule, -at least 2.0 alkoxysilyl functional groups, with a functionality of at least 2.0, preferably at least 2.5, preferably at least 3.0; and / or -at least 1.0 alkoxysilyl functional groups, with a functionality of at least 3.0; - optionally, an organo-tri-alkoxy silane, an organo-tetra-alkoxy silane, and / or a mixture thereof comprising a metal ion (M+) chelating moiety being a cyanurate, a crown ether, an aza-crown ether, a thia-crown ether, a cryptand, a carbamate, a cyano group, a thiocyanate group, or a metallacrown,, - a metal (M+) salt, preferably does the metal salt comprises Li+, Na+, Mg+, Ca+, Al+, and / or a combination thereof, preferably lithium (Li+); - a solvent, preferably an organic solvent; and, - optionally, an ionically conductive compound; thereby obtaining a solid electrolyte; - optionally, drying the obtained solid electrolyte.

A method for regenerating an amine-containing sorbent useful in the capture of carbon dioxide (CO2), by contacting a CO2 complex of the amine-containing sorbent in solution with a metal oxide material while the solution is at a temperature within a range of 60-130° C. to result in release of CO2 and regeneration of the amine-containing sorbent, wherein the CO2 in the CO2 complex is in the form of a carbamate or bicarbonate moiety attached to the amine-containing sorbent. The method may also include re-using the regenerated sorbent to capture carbon dioxide. The sorbent may be, for example, an amino acid (e.g., glycine), alkylamine, alkanolamine, or amine biphasic solvent. The metal oxide material may more particularly be selected from the group consisting of TiO2, TiO(OH)2, MoO3, V2O5, Cr2O3, WO3, Ag2O, Nb2O5, NiO, CuO, MnO2, ZrO2, Fe2O3, Fe3O4, ZnO, and combinations thereof.

The invention discloses bio-based flame-retardant polyol as well as a preparation method and application thereof. Comprising the following steps: generating bio-based polyol containing 3-5 hydroxyl functionalities from raw cardanol and hydroxy ketone under the catalysis of strong acid ion exchange resin, and reacting with bromine to generate the bromine-containing bio-based flame-retardant polyol. The bio-based polyol prepared by the method is good in flame retardant property, a carbamate bond generated by a phenolic hydroxyl group and isocyanate can be reversibly decomposed at a relatively low temperature, and the bio-based polyol has good recycling performance and high bio-based content and is a green and environment-friendly bio-based material.

The invention relates to an enamel repair material and a preparation method thereof, and belongs to the technical field of medical filling materials for tooth defects, the enamel repair material comprises F-HAp, APTES-ZrO2, MPC modified composite resin, 10-MDP, gamma-MPS, a composite initiator, MPC and a dispersant; f-HAp is a fluorine-doped enamel-like hydroxyapatite nanorod, and F-HAp is a fluorine-doped enamel The APTES-ZrO2 is nano zirconium oxide modified by aminopropyl triethoxy silane, and the nano zirconium oxide modified by the aminopropyl triethoxy silane is The MPC modified composite resin is 2-methacryloyloxyethyl phosphorylcholine grafted and modified dimethyl acrylic acid carbamate and glycidyl methacrylate elastomer composite resin; the F-HAp, APTES-ZrO2 and MPC modified composite resin is prepared by adopting a special method, and is compounded with other components according to a certain proportion to obtain the enamel repair material, so that the enamel repair material has good cohesiveness, strength and biocompatibility and excellent leakage resistance, and the use safety and durability are improved.

The present invention relates to a one-step catalytic synthesis method for pentamethylenedicarbamate from pentamethylenediamine and carbon dioxide. The method comprises: mixing pentamethylenediamine with an alcohol and reacting the mixture with carbon dioxide in the presence of a cerium-based catalyst to obtain pentamethylenedicarbamate. The present invention provides a method for preparing pentamethylenedicarbamate, a raw material for bio-based isocyanates. The synthetic route is simple and low-cost. The cerium-based catalyst involved is simple to prepare, has high catalytic efficiency, and is easily separated and recovered. Furthermore, CO2 is directly utilized, converting an inexpensive carbon resource into a high-value-added product, thus having significant significance.

The invention discloses an amino acid cleansing product and a preparation method thereof. The amino acid face cleaning product is prepared from the following raw material components in percentage by mass: 10 to 30 percent of surfactant composition, 1 to 10 percent of amphoteric or nonionic surfactant, 0.05 to 0.5 percent of citric acid, 1 to 5 percent of humectant, 0.5 to 2 percent of isostearyl alcohol, 0.1 to 0.5 percent of phytosterol dimer linoleate, 0.5 to 5 percent of sodium chloride, 0.3 to 1 percent of inulin lauryl carbamate and the balance of water, the surfactant composition comprises a long-chain fatty acyl glycol acid salt. The amino acid face cleansing product keeps uniform appearance under the conditions of high temperature, low temperature and repeated freezing and thawing, has good physical and chemical stability and compatibility, has small damage to a cuticle structure under the condition of realizing sufficient cleaning, and shows good cleaning and mild effects.

The invention relates to an optical monomer and a preparation method and application thereof, the structural general formula of the optical monomer is shown as G1, G2, G3, G4, G5, G6, G7 and G8, R1 is selected from one of the formulas, and R2 is hydrogen or methyl; n is a positive integer selected from 1-10. The optical monomer provided by the invention contains a plurality of aromatic rings with high molar refractive index and low molar volume, and also contains sulfur atoms with relatively high molar refractive index, so that the whole molecule of the whole monomer is extremely high in refractive index; the polymer also has a phenyl dithiocarbamate structure, and has good compatibility with film-forming resin with carbamate when being used for a photopolymer holographic recording medium. The monomer structure provided by the invention has a plurality of branched chains, the overall molecular weight is small, and the molecules are not easy to agglomerate.

A cleansing wet wipe in which a base paper sheet is impregnated with a chemical liquid. The chemical liquid contains at least iodopropynyl butylcarbamate, polyamino-propyl biguanide, benzalkonium chloride, and cetylpyridinium chloride; and the content value for the iodopropynyl butylcarbamate in the chemical liquid is 0.005-0.02 mass % inclusive. The chemical liquid is adjusted to be acidic.

The invention belongs to the field of medicines, discloses a polyamino cationic lipid containing a carbamate structure, a composition containing the polyamino cationic lipid and application, and particularly discloses a cationic lipid shown in a formula (I). The cationic lipid provided by the invention can be used for targeted delivery of nucleic acid, and can significantly enhance spleen targeting of nucleic acid drugs while reducing liver enrichment.

The invention discloses an amino absorbent for promoting CO2 desorption and application of the amino absorbent, and belongs to the technical field of CO2 trapping. The amino absorbent comprises histidine and an amine absorption liquid, and the histidine serving as a catalyst is dissolved in the amine absorption liquid to prepare the amino absorbent for promoting CO2 desorption. The histidine provided by the invention is used as a catalyst for catalyzing CO2 desorption. Experiments show that by adding a small amount of histidine (such as 0.22 wt%), the desorption amount and the maximum desorption rate of CO2 can be remarkably improved, the maximum desorption rate can be improved to 34.0%, and regeneration heat consumption is reduced to 71.7% of the standard. The histidine realizes high-efficiency and low-energy-consumption CO2 desorption by changing a reaction path, inhibiting generation of stable carbamate and promoting proton transfer and amine regeneration, and the catalyst has good stability and can be recycled. And the histidine serving as the catalyst has the characteristics of homogeneous phase and dissolved state, so that the engineering application problem of a solid catalyst in a liquid phase reaction system is fundamentally solved.

The invention provides a composite solid electrolyte membrane, a preparation method thereof and a secondary battery. The composite solid-state electrolyte membrane comprises a modified pyrochlore type oxide solid-state electrolyte, a polymer matrix and a lithium salt, and the modified pyrochlore type oxide solid-state electrolyte comprises a pyrochlore type oxide solid-state electrolyte and a polymer coating layer coating the surface of the pyrochlore type oxide solid-state electrolyte. The polymer coating layer and the pyrochlore type oxide solid electrolyte are connected through a covalent bond, the polymer coating layer is formed by in-situ polymerization of a polymer monomer on the surface of the pyrochlore type oxide solid electrolyte, and the polymer monomer is selected from a monomer with a trifluoroacetamide functional group and / or a monomer with a carbamate functional group. The composite solid electrolyte membrane provided by the invention has excellent lithium ion conductivity.