293 results about "Mercapto Compounds" patented technology

The invention relates to a preparation method of a hyperbranched polymer-modified nano-silicon dioxide hybrid material. The preparation method comprises the following steps: grafting a mercapto group-containing silane coupling agent to the surface of nano-silicon dioxide, utilizing a surface mercapto group and polyfunctional acrylic ester to perform click reaction to form the modified nano-silicon dioxide with the tail end of the acrylic ester, further performing the click reaction with a polyfunctional mercapto compound to form the modified silicon dioxide with the tail end of the mercapto group, repeating the operation between the polyfunctional acrylic ester and the polyfunctional mercapto compound for multiple times, and forming a hyperbranched polymer on the surface of the silicon dioxide. The hyperbranched polymer-modified nano-silicon dioxide hybrid material prepared by the preparation method provided by the invention has the mercapto group at the tail end and a hyperbranched structure, when the hyperbranched polymer-modified nano-silicon dioxide hybrid material is applied in an ultraviolet curing coating, the heat resistance, the hardness, the wear resistance and other mechanical properties of the coating can be improved, and the hyperbranched polymer-modified nano-silicon dioxide hybrid material can particularly solve the problems of dispersion and migration of the nano-silicon dioxide in the ultraviolet curing coating and the problem of oxygen polymerization inhibition of the ultraviolet curing coating.

The invention discloses a detection method of metal ions. In the method, based on a gold nanoparticles-sulfide system, by virtue of the interaction among the gold nanoparticles, a hydrolysate of a sulfide and the detected metal ions or the interaction among the gold nanoparticles, a sulfhydryl compound and the detected metal ions, resonance absorption of plasmas on the surface of the gold nanoparticles changes so that the color and the ultraviolet visible absorption strength of the gold nanoparticles changes. By adopting the method, the detected metal ions in the solution system can be rapidly detected by directly distinguishing change of solution color through eyes or a simple apparatus. The detection method has the advantages of simple and convenient operation, low detection cost, high detection sensitivity, small sampling quantity and wide application scope.

The invention discloses application of glutathione-based stable gold nano cluster particles to detection of a sulfhydryl compound, wherein the glutathione-based stable gold nano cluster particles are prepared from a chloroauric acid solution and a glutathione solution, wherein a molar ratio of chloroauric acid to glutathione is between 1:0.5 and 1:1. By using an fluorescence enhancement characteristic of the glutathione-based stable gold nano cluster particles after the addition of the sulfhydryl compound, through detecting the change of fluorescence intensity before and after the sulfhydryl compound with an unknown concentration reacts with the glutathione-based stable gold nano cluster particles, a linear standard curve chart is drawn, and a calibration relation is obtained by adopting linear fitting, so that the sulfhydryl compound with the unknown concentration is detected.

The invention relates to a fluorescence chemical sensor capable of selectively detecting a biological sulfhydryl compound, which is characterized by comprising the structural formula shown in the description, wherein, in the formula, R is one of the following structures shown in the description. The fluorescence chemical sensor, provided by the invention, has the advantages that the used raw materials are easily obtained, a synthetic method is simple, reaction conditions are easy to control, the sensitivity is high, the sub yield of the molecular weight of a product is high, a sulfhydryl-containing compound can be selectively recognized, and cysteine, glutathione and homocysteine can be separated from each other.

Sulfhydryl compounds, including hydrogen sulfide and mercaptans, may be removed from a fluid or gaseous stream or substrate by reacting the hydrogen sulfide and mercaptans in the stream with a scavenger of the structural formula:wherein R1, R2 and R3 are each independently selected from the group consisting of R4 and R5, R4 is a C1-C20 straight or branched chain alkyl group, R5 is —[(CH)m—NH]p—(CH2)nOH, n and m are independently an integer from 2 to about 6, p is from 1 to about 6; and wherein at least one of R1, R2 and R3 is R4 and at least one of R1, R2 and R3 is R5.

The invention relates to a soil heavy mental passivator and application thereof, and belongs to the technical field of a soil conditioner. The invention aims at solving a technical problem of providing a soil heavy mental passivator. The soil heavy mental passivator consists of the following components in parts by weight: 20-35 parts of humic acid, 30-50 parts of a sulfhydryl compound, 10-30 parts of calcium phosphate and 3-10 parts of chitosan. The soil heavy mental passivator disclosed by the invention can be used for effectively reducing the effectiveness of heavy metal mercury in soil, and relieving the absorption and enrichment of the mercury in crops; the physical properties and the fertility level of the soil are not damaged, and a certain production increasing effect is achieved; and the soil heavy mental passivator is simple in preparation method and low in cost; in addition, the soil heavy mental passivator disclosed by the invention has a certain repair effect on other heavy metals, and is conducive to the reduction of enrichment of other heavy metals in plant bodies.

The invention belongs to the field of polymer preparation, and relates to self-repairing polyurethane based on hydrogen bonds and dynamic disulfide bonds as well as a preparation method and application of the self-repairing polyurethane. The preparation method comprises the steps: introducing a plurality of diisocyanates into unsaturated polyester with low molecular weight to form hydroxyl-terminated unsaturated polyurethane; grafting and introducing a prepolymer containing an isocyanate group and dynamic disulfide bonds to a terminal hydroxyl group of unsaturated polyurethane to form a polymer; carrying out sulfydryl-alkene click reaction on the polymer and a multi-sulfydryl compound to obtain the self-repairing polyurethane based on the dynamic disulfide bonds. The preparation method ofthe self-repairing polyurethane is novel; the plurality of diisocyanates are introduced into unsaturated polyester with low molecular weight, the number of intermolecular hydrogen bonds is increased,improvement of the self-repairing performance of polyurethane is facilitated, meanwhile, amido bonds generated through the reaction of carboxyl and isocyanate groups are used for endowing the polyurethane with the advantages of high mechanical strength and good toughness, and the polyurethane with great self-repairing capacity and mechanical strength is prepared.

The invention discloses a dual-component PSU-typed liquid rubber-based sealant and a preparation method of the PSU-typed liquid rubber, wherein, the sealant comprises a component A and a component B; the component A comprises PSU-typed liquid rubber, plasticizer, filling material, tackifier, antioxidant and vulcanization retarder; the component B comprises vulcanizing agent, vulcanization accelerator, plasticizer and filling material; and the component A and the component B are mixed together by normal method so as to prepare the finished product. The PSU-typed liquid rubber uses the mixture of polyether glycol and polyether-tribasic alcohol and polyisocyanate as raw materials to generate isocyanate-terminated polyurethane prepolymer under the action of acidic catalyst; furthermore, the isocyanate-terminated polyurethane prepolymer is terminated by sulfhydryl compounds to synthesize the sulfhydryl-terminated liquid rubber which takes the polyurethanes as main chain and has local crosslinking structure characteristic; the liquid rubber is taken as the basic rubber to prepare the sealant which has excellent mechanic performances and can be widely applied to the fields such as the construction of housing, plazas, roads, airports, bridges, hydraulic engineering, water conveyance project, sewage disposal engineering, and the like, the manufacture of automobiles, trains, containers, and the like, and the electric apparatuses, power, aeronautics and astronautics, and the like.

The invention relates to a metal cleaning agent and particularly relates to a cleaning agent for cleaning surface contaminants of mechanical metal. The metal cleaning agent disclosed by the invention is used for overcoming the defects of the existing cleaning agents that the cleaning efficiency of relatively heavy oil stains is low, the cleaning time is long and the environment is polluted. The metal cleaning agent is prepared from a mercapto-containing compound, alcohol ether, a strong chelating agent and water.

The invention relates to a browning conditioning fluid containing sulfydryl compound. The browning conditioning fluid is the solution which is used for improving the bonding force between an inner-layer copper surface and a prepreg sheet and also can improve the copper loading amount of the browning conditioning fluid in the production and manufacture technology of the multilayer board of a printed circuit board (PCB). The browning conditioning fluid comprises 90-120g / L of sulfuric acid, 10-20g / L of hydrogen peroxide, 10-20g / L of corrosion inhibitor, 20-50mg / L of halide ion, 1.0-4.0g / L of bonding force accelerator and the balance of water which is added until the solution is 1L, wherein the bonding force accelerator is selected from a sulfydryl-substituted nitrogen-containing heterocycle compound. The copper carrying amount of the browning liquid can reach 50g / L and can be guaranteed to be 1-50g / L. The copper surface is browned to obtain an even and rough brown surface, and the copper surface is kept to have stable and favorable bonding force with the prepreg sheet and excellent heat resistance.

The invention chemically decorates the gold electrode surface with mercapto compound, like mercapto aniline, mercapto ethylamine, etc. It uses the mercapto end of the mercapto compound to combine with the gold electrode, chemically, and fixes the mercapto end on the gold electrode to make the amido on the other end exposed on the electrode surface. On a certain condition, the exposed amido can combine with the nano gold crystal by chemical bond, thus fixing the nano gold crystal on the gold electrode surface. The surface of the nano gold crystal has charges and can strongly absorb the antibody on the neutral or physiological pH condition, making the antibody fixed on the surface of the nano gold crystal, and thus making the nano immune biosensor.

The invention discloses a heavy metal adsorbent and a preparation method and application thereof. The heavy metal adsorbent is biological charcoal obtained by air-drying and pyrolyzing cruciferous plants in a grinding mode, wherein the cruciferous plants comprise leaf mustards, radishes, oilseed rape, Chinese cabbages, cabbages, shepherd's purse, wild cabbages and the like. Through tests, it is found that the cruciferous plants contain more sulfhydryl compounds, and the biological charcoal with a sulfydryl group can be obtained after the sulfhydryl compounds are pyrolyzed, can generate adsorbing and chelating effects with heavy metal ions and has the high affinity with positive ions of heavy metals such as Cd, Cu, Mn, Ni and Zn; the waste cruciferous plant bodies such as the Chinese cabbages and the leaf mustards are collected to be air-dried and pyrolyzed to prepare the biological charcoal, therefore, the discharge amount of garbage can be decreased, reutilization of waste resources is achieved, the high heavy metal adsorption capacity is achieved, and wide application prospects in heavy metal-containing water body treatment, heavy metal-contaminated soil remediation and permeable reactive barrier packing are achieved.

Novel compositions of silicon-containing sulfhydryl compounds, their preparation and use in methods for treating disease are described. Silicon confers lipophilicity that can enhance the penetration of the silicon derivative sulfhydryl compounds across the gut wall, cell membranes and blood brain barrier, thus improving therapeutic properties including bioavailability, metabolism, and / or pharmacokinetics. The organosilyl group provides compounds having improved pharmacokinetics. The invention encompasses novel compounds, analogs, prodrugs and pharmaceutically acceptable salts thereof, pharmaceutical compositions and methods for treatment of diseases and other maladies or conditions and the like. The subject invention also relates to processes for making such compounds as well as to intermediates useful in such processes.

The invention discloses an aqueous phase preparation method for a water-soluble chiral ZnCdSe quantum dot. The preparation method comprises the following steps: (a) preparing a NaHSe or KHSe solution as a selenium source solution, dissolving a zinc salt and a water-soluble chiral mercapto compound in water so as to obtain a precursor solution of zinc and preparing an aqueous solution of a cadmium salt; (b) blowing inert gas into the precursor solution of zinc, injecting the selenium source solution and the aqueous solution of the cadmium salt and carrying out stirring so as to prepare a ZnCdSe precursor solution; and (c) subjecting the ZnCdSe precursor solution to a reflux reaction under stirring at a temperature of 80 to 100 DEG C for 1 to 5 h under the protection of inert gas, or transferring the ZnCdSe precursor solution to a reaction vessel and heating the ZnCdSe precursor solution to 160 to 210 DEG C for a reaction for 45 to 90 min so as to prepare an aqueous solution of the water-soluble chiral ZnCdSe quantum dot. The preparation method substantially reduces the usage amount of cadmium and is safe, simple and convenient to operate; and the obtained quantum dot has excellent photochemical properties and chirality and has wide application prospects in aspects like detection, location and targeted tracing of chiral substances.

A photosensitive lithographic printing plate comprising a hydrophilic support and a photopolymerizable photosensitive layer containing: (i) a sensitizing dye having an absorption maximum in a wavelength range of from 360 to 450 nm; (ii) a hexaarylbisimidazole compound; (iii) an addition polymerizable compound having an ethylenically unsaturated double bond; (iv) a binder polymer; and (v) a mercapto compound represented by the following formula (1) as defined herein.

The invention discloses an analysis method for combining chemical derivation with matrix auxiliary laser desorption ionization-time of flight mass-spectrometric technique (MALDI-TOF-MS). According to the method provided by the invention, polypeptide is adopted for deriving aldehyde and sulfydryl micromolecule metabolites, and after the to-be-detected micromolecule matter is derived, the MALDI-TOF-MS detection analysis is performed. After the micromolecule matter is subjected to polypeptide treatment, the simple single quasi-molecular ion peak [M+H]+ is acquired, so that the distinguishing degree of the micromolecule matter in a mass spectrum graph can be obviously improved and the detection sensitivity of the micromolecule matter in the mass spectrum is greatly increased. The method has the advantages of high sensitivity, strong universality, simple and convenient operation, no matrix interference and less sample loss; the sulfhydryl compound in ultralow content in a body fluid can be quantitatively detected, without preparation for a complex matrix and a deriving reagent; and the method has a huge application prospect in search on metabonomics.

The invention discloses a method for preparing an all-bio-based photocuring activated monomer and an application of the all-bio-based photocuring activated monomer. The preparation method includes the steps that a bio-based hydroxyl compound containing stiffness rings or a modified bio-based hydroxyl compound containing stiffness rings, triethylamine and solvent are mixed, undecylenylacyl chloride is dripped slowly under the ice-bath condition, the temperature is rise to an indoor temperature to further react for 12-36 hours after reacting is conducted for 2-4 hours, suction filtration, liquid phase washing, drying, suction filtration and rotary evaporateion are carried out, and accordingly the all-bio-based photocuring activated monomer is obtained. According to the application of the all-bio-based photocuring activated monomer, 5-40 parts of all-bio-based photocuring activated monomer, 100 parts of all-vegetable-oil-based polyenoid photocuring prepolymer, 10-60 parts of multi-mercapto compound and 2-8 parts of UV-light 1173 photoinitiator, by weight, are evenly mixed, and then an all-bio-based ultraviolet curing coating is obtained. Double bonds contained in the all-bio-based photocuring activated monomer prepared through the method are located at the end positions, so that the reactivity is high. The content of renewable carbon atoms is 100%, and thus dependence on oil resources is relieved.

The invention discloses an aqueous-phase synthesis method of a Cu-doped Zn1-xCdxS quantum dot and a core / shell structure thereof. The method comprises the following steps of directly dissolving cadmium ion sources, copper ion sources and zinc ion sources into water, adding a stabilizer, namely sulfhydryl compound, adding a sulfur source under a certain pH value and heating under the protection of inert gases to prepare the Cu-doped Zn1-xCdxS quantum dot; jacketing the Cu-doped Zn1-xCdxS quantum dot with ZnS through a secondary injection method to obtain a Cu:Zn1-xCdxS / ZnS core / shell quantum dot. The method has the advantages of low cost, good operability, good repeatability and low requirements on equipment conditions. The Cu:Zn1-xCdxS / ZnS core / shell quantum dot prepared by the method has excellent luminescence property and good fluorescence stability, is suitable for optoelectronic devices such as solid state lighting, solar cells, displays and the like and is also suitable for being widely applied in bio-labeling, imaging and the like due to good water solubility.

The invention relates to an amphiprotic fluorescent whitener and and method for making same, comprising, firstly, further condensing cyanuric chloride with DSD acid, adding hydroxy or sulfhydryl compounds for secondary condensation, adding amino compound for third condensation, dropping alkaline solution of cation etherifying agent to the reaction system, and cationizing the condensation product in the third step; and, at last, the fluorescent whitener is obtained by filtrating and recrystallizing to purify and refine the product. The method for preparing cation etherifying agent amphiprotic fluorescent whitener has a simple process and causes small environment pollution. Compared with ordinary fluorescent whitener, the amphiprotic fluorescent whitener synthesized in the invention can sufficiently enhance the visual whiteness of the whitened material, and sufficiently extends the range of application of pH value.

The present invention discloses one kind of composite stabilizer of organic RE thiolate for halogen containing polymer and its application. The composite stabilizer is compounded with La, Ce, Pr or Nd thiolate formed with sulfhydryl compound and its mixture, organic metal stabilizer, lubricant, organic stabilizing assistant, etc. It has the features of long heat stabilizing period, low toxicity, etc. and may be used as the heat stabilizer in processing halogen containing polymer.

The invention relates to an elastic optical resin material and a preparation method thereof. The invention is characterized in that the elastic optical resin material is prepared by the following steps: firstly prepolymerizing mono / dual sulfhydryl compounds and diisocyanate to prepare a component A in the presence of amine catalysts, secondly mixing bifunctional methacrylate ester with polymerization inhibitors to prepare a component B, mixing the component A with the component B in the proportion of 60-70 to 40-30 by weight percent, adding photoinitiators in the weight of 1.0-3.0 percent of the gross weight of the component A and the component B, uniformly mixing and deaerating the component A, the component B and the photoinitiators, and curing the component A, the component B and the photoinitiators by ultraviolet radiation. The preparation method has the advantages of simple preparation process, good process controllability and reproducibility, mild reaction condition, no pollution and low cost. Prepared products have good elasticity and can be used for filling clearances between the covering layer of a cellphone screen and a liquid crystal panel and enhancing brightness and contrast.

The invention discloses a compound with the functions of radiation prevention, oxidation resistance and DNA protection. The invention is prepared by sea protein peptide and ganoderma lucidum polysaccharide with the weight ratio of 18 to 1 and has the functions of preparing radiation prevention drugs, radiation prevention health foods and radiation prevention foods. The preparation of the invention has the features of easy absorption, rapid absorption, low viscosity and good water-solubility. The invention ensures the improving of the survival rate and average survival time of a radiating mouse 30d, the number of the peripheral blood leukocytes, the amount of DNA of myeloid cells, superoxide dismutase (SOD) of serum and the 50% hemolytic dose (HC50). Further, the invention has the effect of radiation prevention, and the radiation prevention effect of the invention is superior to the radiation prevention effect of the ganoderma lucidum polysaccharide when the ganoderma lucidum is provided solely. The employment of the invention on the radiation drugs, radiation health foods and radiation foods can solve the problem that great toxicity universally exists on the current mercapto compounds.

The invention provides UV cured polymercaptan resin. The UV cured polymercaptan resin is prepared from the following raw materials in parts by weight: 0.01-70 parts of a sulfhydryl compound, 0.01-60 parts of an acrylate or modified acrylate compound, 0.01-10 parts of a UV initiator, and 0.01-10 parts of a UV polymerization inhibitor, wherein the sulfhydryl compound contains two or more -SH structures, and terminal groups of the acrylate or modified acrylate compound contain two or more -C=C- groups. Polymercaptan is modified by acrylate, acrylate unsaturated double bonds are introduced in molecular structure, thus the polymercaptan can be subjected to UV cured under UV light irradiation, the cost is saved, the curing time is short, the energy utilization ratio is high, and environmental pollution is reduced. Moreover, mechanical properties such as adhesion and hardness of an obtained cured film are all improved.

The invention relates to a shape memory elastomer technology, and aims to provide a preparation method of a reshapeable shape memory elastomer based on eutectic crystal. The method comprises the following steps: preparing linear aliphatic polylactone glycol by a ring-opening polymerization method, dissolving two or more than two of linear aliphatic polylactone glycol and an ester exchange catalystin a proper amount of solvent, uniformly dispersing the raw materials, and removing the solvent; heating the mixture for reaction; carrying out chemical crosslinking on eutecticable copolyester diolobtained by the reaction and polyfunctional isocyanate to prepare an elastomer; or modifying the eutecticable copolyester diol into a prepolymer modified by terminal double bonds, and then performingchemical crosslinking on the prepolymer with a polyfunctional group sulfhydryl compound to prepare the elastomer. The method achieves simple preparation of copolyesters with different sequence structures and melting points, and is suitable for mass production. The elastomer with different thermal transition temperatures and high crystallinity is obtained, and the application requirement is satisfied. The product has excellent shape memory performance at respective deformation temperatures, the fixation rate and the recovery rate are close to 100%, and the requirements of different occasions can be met.

The invention discloses a tea polyphenol-based multifunctional nano-composite as well as a preparation method and an application thereof. In the presence of aldehyde-based compounds, tea polyphenol and an amino compound / sulfydryl compound are quickly subjected to an assembly reaction, the tea polyphenol-based multifunctional nano-composite is formed, the reaction temperature is low and the reaction time is short, the influence on the activity of functional molecules such as tea polyphenol, the amino compound / sulfhydryl compound and the like is greatly reduced, according to the preparation method, the free radical scavenging capacity of tea polyphenol can be brought into full play, and the introduced amino compound or sulfydryl compound can enable the obtained nano-composite to have fluorescence, reduction responsiveness and targeting property, so that the obtained nano-composite shows various excellent properties.

The invention belongs to the technical field of fine chemical engineering and particularly relates to a composition for a cleaning agent, the cleaning agent and an application of the cleaning agent in cleaning rust and stains on various stone materials. The composition for the cleaning agent comprises a mercapto compound, diol monoalkyl ether, a wetting agent and a nitrogen-containing compound in a weight ratio of 1 to (0.10-2.0) to (0.001-0.5) to (0.05-1.0), preferably 1 to (0.5-1.0) to (0.1-0.3) to (0.1-0.5). The composition for the cleaning agent disclosed by the invention is in line with the requirement of environmental friendliness and is suitable for cleaning rust and stains on surfaces of various stone materials. The composition for the cleaning agent has the characteristic that the rust and stain removal is complete, the entire cleaning process becomes simple and the composition for the cleaning agent is easily popularized and applied.

The invention provides a reactive highly-branched vinyl polymer and a preparation method thereof. The molecular chain of the polymer comprises a hydrosulphonyl, a thioether bond and a carbon-carbon double bond, wherein the content of the hydrosulphonyl ranges between 0 mmol / g and 2.5 mmol / g; the mass content of elemental sulfur is 0.8 percent to 20 percent; the content of the carbon-carbon double bond ranges between 0 mmol / g and 2.5 mmol / g; moreover, the contents of the hydrosulphonyl and the carbon-carbon double bond are not equal to zero at the same time. The polymer is prepared by monofunctionality vinyl compound, polyfunctionality vinyl compound and polyfunctionality hydrosulphonyl compound with the molecular weight not more than 4,000 and at least containing two hydrosulphonyls through free radical copolymerization. The reactive highly-branched vinyl polymer, which can realize addition reaction and cross linking reaction under the condition of heating, oxidation, ultraviolet irradiation or high-energy radiation, can be widely used in fields such as coating material, adhesive, packaging material, casting, reactive extrusion and reactive injection molding, thereby having tremendous application value.

A two-component film-forming composition that includes a first component containing a polyol and a catalyst; and a second component containing an unblocked polyisocyanate. At least one of the components includes a volatile carboxylic acid compound and both components are substantially free of mercapto compounds and polyphenols. The composition is used to coat a substrate by mixing the two-component film-forming composition, applying the mixed composition to at least a portion of a surface of the substrate to form a coating film, and curing the coating film. The method provides substrates coated with the two-component film-forming composition.

The present invention discloses a rapid preparation method of an inorganic compound coated aqueous phase II-VI group quantum dot composite material. The rapid preparation method comprises: adopting cadmium chloride or zinc chloride as a cation source, adopting sulfur powder, tellurium powder or selenium powder as an anion source, adopting sodium borohydride as a reducing agent, adopting mercaptopropionic acid, thioglycolic acid or glutathione and other mercapto compounds as ligands, heating to a temperature of 90-100 DEG C, and refluxing for different times to obtain quantum dots with different emission wavelengths; and adding a sodium salt or potassium salt to the quantum dot solution, carrying out stirring dissolving, adding excessive methanol, ethanol, propanol or acetone and other polar organic solvents, precipitating, filtering, drying, and grinding to obtain the corresponding quantum dot / inorganic compound complex powder with characteristics of strong fluorescence emission and high stability, wherein the powder can be used in the field of solid luminescent materials. The method of the present invention has characteristics of simple operation, rapidness, high efficiency, and green environmental protection, and is suitable for mass production.