179 results about "Mercapto compound" patented technology

The use of certain mercapto compounds as shelf life improvers for infrared-sensitive lithographic printing plate precursors is disclosed. The compounds are five-membered heteroaromatic rings containing a nitrogen atom and at least one other heteroatom, which can be oxygen, sulfur, or another nitrogen atom, such that two ring heteroatoms are bonded to a ring carbon bearing a thiol group.

Disclosed is a polyol / polyisocyanate adhesive system having an isocyanate component and a catalyzed component which form a heat-cured composition when admixed and heated above a threshold temperature. The catalyzed component has a hydroxyl-functional component catalyzed with a catalyst combination of a heat-activatable amine or amine-like catalyst which is activated at temperatures above the threshold temperature, and an activatable complexed metal catalyst comprising the reaction product of tin or bismuth catalysts, or a mixture thereof, and a molar excess of a mercapto compound complexing agent. The catalyst combination is effective to maintain the processibility of the system at ambient temperatures while promoting the rapid cure of the system when heated above the threshold temperature.

An object of the invention is to provide a sealant composition for a plastic liquid crystal display cell that is capable of being applied to a sheet heat press adhesion method and of producing a plastic liquid crystal display cell having high reliability under a high temperature and high humidity environment. A two-component sealant composition for a plastic liquid crystal display cell of the invention contains the following components (1) to (6): (1) from 15 to 84% by weight of a liquid epoxy resin having from 1.7 to 6 in weight average of epoxy groups in one molecule and an ionic conductivity of an aqueous solution obtained by extraction separation by contact mixing with 10 times by weight of pure water at from 40 to 80° C. of 2 mS / m or less, (2A) from 10 to 50% by weight of a curing agent containing one or a mixture of two or more selected from (2A-1) a tetrafunctional mercapto compound or (2A-2) a modified polymercapto derivative, having an ionic conductivity of an aqueous solution obtained by extraction separation by contact mixing with 10 times by weight of pure water at from 40 to 80° C. of 0.6 mS / m or less, (3) from 0.01 to 15% by weight of a curing accelerator, (4) from 5 to 50% by weight of an inorganic filler, (5) from 0.1 to 5% by weight of a silane coupling agent, and (6) from 1 to 25% by weight of rubbery polymer fine particles having a softening temperature of 0° C. or less and an average particle diameter of primary particles of from 0.01 to 5 mum.

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.

A process for enhancing the solderability of a surface, particularly copper surfaces upon printed circuit boards, is disclosed. The surface is plated using a silver plating solution. The plated surface is then further treated with a solution that comprises an organic heterocyclic mercapto compound and most preferably an alkali metal hydroxide.

A photoresist stripper composition, a method for forming wire structures thereby, and a method of fabricating a thin film transistor substrate using the composition. The photoresist stripper composition includes about 50 WT % to about 70 WT % of butyldiglycol, about 20 to about 40 WT % of an alkylpyrrolidone, about 1 WT % to about 10 WT % of an organic amine compound, about 1 to about 5 WT % of aminopropylmorpholine, and about 0.01 to about 0.5 WT % of a mercapto compound.

The present invention discloses one kind of fast curing double-component epoxy adhesive and its preparation process. The adhesive comprises component A comprising epoxy resin or modified epoxy resin and plasticizer or roughener; and component B comprising modified amine curing agent, composite promoter and coupling agent. The adhesive features that of the component B, the modified amine curing agent is prepared with aliphatic polyamine 20-40 wt%, hydroxyl compound 40-50 wt% and thiourea compound 8-15 wt% and through reaction at 70-120 deg.c; and the composite promoter is prepared with mercapto compound 30-50 wt% and Lewis base 50-70 wt% and through reaction at 40-80 deg.c. After mixing, the adhesive may form gel in 3-8 min at room temperature and have strength reaching 6.7 MPa in 30 min.

The invention belongs to the field of electronic polymer materials and discloses an organic silicon electronic-pouring sealant with high refractive index and high transparency, as well as a preparation method and an application thereof. The method comprises the following steps of: adding olefin-based silane and a silanol type compound into an organic solvent, adding a catalyst, and reacting at the temperature of 50-100 DEG C for 3-12h to get an olefin-based silane oligomer precursor; dripping an olefin-based silane coupling agent solution into a mercapto-compound solution, and reacting at the temperature of 50-100 DEG C for 8-48h to get a mercaptosilane oligomer precursor; mixing the two precursors to get the organic silicon electronic-pouring sealant, and the curing method comprises the following steps of heating to the temperature of 80-140 DEG C and curing for 3-8h, wherein the refractive index after curing is 1.53-1.59, and the light transmittance is 94-99%. According to the preparation method disclosed by the invention, phenyl and a sulfur element are introduced into the organic silicon electronic-pouring sealant, a thermocuring cross-linking technology is adopted, and mercapto-alkenyl click chemistry thermocuring can occur rapidly, so that the refractive index, the light transmittance and the mechanical properties after curing can be improved.

A (poly)oxyalkylene block silyl ester copolymer comprising silyl ester copolymer block units (A) and block units (B), the block units (a) comprising (a) component units derived from a polymerizable unsaturated carboxylic acid silyl ester, and (b) polymerizable unsaturated monomer units other than the component units (a), the block units (B) derived from particular mercapto compounds, and an antifouling paint comprising the (poly)oxyalkylene block silyl ester copolymer. The copolymer enables the formation of an antifouling coating film which exhibits less cracking tendency, excellent adherence, less peeling tendency and controlled hydrolysis rate resulting in excellent antifouling performance and properties.

The invention relates to a method for rapidly preparing a water-soluble quantum dot by an ultrasonic spraying method with continuous production, which comprises the following steps that: cadmium ions or zinc ions and hydrogen (or selenide) telluride or sodium hydrogen telluride (or selenide) react to obtain a precursor solution of cadmium (zinc) telluride (selenide) through the complexation of a mercapto compound. An ultrasonic atomizer is used to atomize the precursor solution to form fogdrops of the precursor solution, and the fogdrops flow through a device with constant temperature to react to obtain the water-soluble quantum dot. The method has the advantages of high speed and continuous quantum dot production, the prepared quantum dot has high fluorescence quantum yield (between 20 and 50 percent), and good monochromaticity of luminescence (the peak width at half height of a fluorescence spectrum within the range of visible light is between 30 and 40nm), and the size of nano-particles can be easily controlled by changing the temperature and flow rate, thereby realizing the adjustment to luminescence peak positions (between 400 and 700nm).

A microwave process for preparing the water-soluble core / shell quantum point of CdTe / CdS with high fluorescent quantum efficiency includes such steps as mixing the salt or oxide of Cd with water-soluble mercapto compound in water phase, filling the solution of CdTe nanocrystal to obtain the precursor solution of CdTe / CdS, filling in glass tube, and microwave irradiating in microwave reactor.

Hybrid radiation curable and / or low temp thermal cured thiol-ene compositions containing a quantity of unsaturated oligomers, a quantity of unsaturated polymers, a quantity of unsaturated monomers, a quantity of mercapto compounds, a quantity of functional silanes compounds and an activation catalyst as well as a possible quantity of adjuvants, such as stabilizers, pigments, amine acrylates, fillers, film forming and rheology additives, cationic initiators and polymerization inhibitors. The quantity of mercapto compounds, the quantity of functional silane compounds, the quantity of unsaturated polymers, the quantity of unsaturated oligomers, the quantity of unsaturated monomers, and the activation catalyst are mixed in order to form a coating mixture. The coating mixture is used for coatings and inking onto imprintable surfaces.

The invention discloses a method for preparing polyethylene glycol network gel by using a mercapto-vinyl clicking system. Free radicals are generated through initiating by using a free-radical initiator under the condition of a certain temperature or lighting, so as to synchronously catalyze a vinyl compound and a mercapto compound to be subjected to click reaction. According to the method disclosed by the invention, by using the controllability of the efficiency of initiation of the free radicals under the condition of temperature and lighting, a polyethylene glycol derivative containing three or more multiterminal unsaturated carbon-carbon double bonds and a polyethylene glycol derivative which at least contains two terminal mercapto groups are synthesized by using the method, so as to prepare a polyethylene glycol polymer gel network with a regular structure. According to the method disclosed by the invention, the operation is simple, reaction materials are easily obtained, reaction is rapid, and the reaction conditions are mild; the polymer network prepared by the method disclosed by the invention has the advantages of good biocompatibility, regular structure, high mechanical strength and the like.

A hair relaxer includes at least one specific mercapto compound such as 2-methoxyethyl 3-mercaptopropionate, 2-mercapto-4-butanolide and 2-mercapto-4-butyrolactam. The hair relaxer can achieve an excellent effect of shaping and relaxing hair over a wide range of pH values from weak acidity to weak alkalinity. In particular, the hair relaxer displays a more superior hair shaping and relaxing performance in a weakly acidic to neutral pH range. Consequently, the hair relaxer can drastically reduce the damage to the hair and skin and can reliably perform straightening, uncurling, curling and other hair processing.

The invention discloses a low-modulus optical adhesive composition comprising the following components: 30-60 % of polyfunctional (meth) acrylate resin, 35-65 % of a (meth) acrylate monomer diluents, 3-12 % of a mercapto compound and 0.5-2 % of a photoinitiator. The low-modulus optical adhesive composition provided by the invention does not contain a plasticizer, and has characteristic of relatively low viscosity. By using the composition of the invention for bonding, electro-conductive glass membrane, display modules and panels are not polluted due to shift of the plasticizer, thereby improving precision and accuracy of touch screens. Furthermore, the composition of the invention does not rely on increasing a content of an active diluent to achieve the effect of low viscosity, thereby preventing generation of relatively large internal stress to cause warp and deformation at bonding positions.

A (poly)oxyalkylene block silyl ester copolymer comprising silyl ester copolymer block units (A) and block units (B), the silyl ester copolymer block units (A) comprising (a) component units derived from a polymerizable unsaturated carboxylic acid silyl ester, and (b) polymerizable unsaturated monomer units other than the component units (a), the block units (B) derived from a mercapto compound represented by the following formula (1) or (2), and further an antifouling paint comprising the (poly)oxyalkylene block silyl ester copolymer. wherein R1 represents a hydrocarbon group or ether-bond-containing hydrocarbon group having a valency of 1 or higher and having 1 to 30 carbon atoms; R2 represents a bivalent hydrocarbon group having 1 to 30 carbon atoms or a group of the formula -CH(R3)-wherein R3 represents a group of the formula R4-O-R5, R4 representing a bivalent hydrocarbon group having 1 to 30 carbon atoms, and R5 representing a monovalent hydrocarbon group having 1 to 30 carbon atoms; X represents: ; n is an integer of 1 to 5; m is an integer of 1 to 100; l is an integer of 1 to 5; k is an integer of 0 to 100; a is an integer of 0 or 1; j is an integer of 1 to 50; and i is the valency of R1. The present invention enables forming an antifouling coating film which exhibits less cracking tendency, excellent adherence so as to ensure less peeling tendency and desirably controlled hydrolysis rate so as to be excellent in antifouling performance (antifouling activity), antifouling properties, in particular, antifouling properties in highly fouling environment and long-term antifouling properties.

The invention discloses a fluorescent probe containing N, N-diethyl paramethylaminophenol and application thereof in the thiophenol detection. The structural formula of the fluorescent probe is as follows: in a phosphate buffered solution with pH value of 7.4, the compound can be in nucleophilic substitution reaction with thiophenol for releasing out the strong fluorescent material 3-(N, N-diethyl)-6-hydroxy-fluorane, so that the reaction system has a strong fluorescent signal at the wavelength of 543 nm; experimental results show that the fluorescent probe is used to detect the thiophenol; the detection limit of the thiophenol is 6.0*10<-9>mol / L; the relative standard deviation is 2.6%; the qualitative and quantitative detection of the thiophenol can be realized. The detecting method is simple in operation, high in accuracy and sensitivity and good in selectivity; different thiol compounds have no disturbance to the system of the fluorescent probe detecting the thiophenol; the fluorescent probe can be used for detecting the content of the thiophenol in a water sample.

The invention discloses a preparation method of a water-soluble Zn-doped CdTe quantum dot CdxZn1-xTe. The preparation method comprises the following steps of: mixing a cadmium salt and a zinc salt or oxides of cadmium and zinc with a water-soluble mercapto-compound in a water phase; injecting prepared tellurium hydride to obtain a CdxZn1-xTe precursor solution; putting the solution into a hydro-thermal reaction kettle; and reacting to obtain a CdxZn1-xTe fluorescent quantum dot. The method is implemented in a water phase, is safe, easy and convenient for operation, is easy for mass productionand is environmentally friendly; the obtained product has high performance; even Zn doping molar percentage (i.e., the molar percentage of Zn to Cd in CdxZn1-xTe) surpasses 70 percent, the obtained quantum dot has high fluorescent quantum yield and high light stability and can be widely applied to photoelectric conversion, luminous and display materials, biological detection and targeting tracing; and the content and the toxicity of Cd are greatly lowered.

The invention discloses an aqueous phase synthesis for high quality cadmium selenide quantum dots in temperature controlled microwave reactor by using water as solvent, mixing cadmium salt or cadmium oxide with water-soluble mercapto compounds, reacting sodium borohydride or potassium borohydride with selenium powder, obtaining cadmium selenide precursor solution, placing the solution in air-tight polytetrafluoroethylene tank, reacting in temperature controlled microwave reactor, thus rapidly synthesizing cadmium selenide fluorescent light quantum dots.

An optical device having a structure which contains a metallic layer and enables excitation of plasmon resonance, such as a measurement chip for use with a surface-plasmon-resonance biosensor having a metallic layer. In order to prevent oxidation of the metallic layer, the metallic layer is covered with a film made of a mercapto compound containing a benzene ring and / or a hetero ring, or a reductive compound containing a metal-binding group which can be bound to the metal of which the metallic layer is made.

The invention discloses a polylactide containing a side hydroxy or side carboxy functional group and a preparation method thereof. According to the preparation method, a polylactide with a functionalized norbornene-containing side group and a mercapto compound undergo mercapto-alkene click chemical reaction to form the polylactide containing the side hydroxy or side carboxy functional group. The preparation method for the polylactide is simple, quick and low in cost; a plurality of hydrophilic polar active groups are introduced to the main chain through norbornene, so that the prepared polylactide has multiple structures, high degradability, strong hydrophilic property and many active groups; and when the polylactide serving as a medicament carrier is applied to preparation of a pro-medicament, the prepared pro-medicament is high and controllable in medicament loading rate and good in hydrophilic property, can be completely degraded, contains groups capable of being modified again and has great scientific research and economic value.

A heat developable image recording material including a photosensitive silver halide, a reducing agent for silver ions, a binder and non-photosensitive organic acid silver salt particles on one side of the surface of a substrate. A content of silver behenate in the non-photosensitive organic acid silver salt particles is 90 mol % to 100 mol %, and at least one kind of mercapto compound is contained in a surface of the substrate at the same side as a layer having the photosensitive silver halide. The heat developable image recording material includes a compound represented by following the general formula (1) wherein, R<21>, R<22 >and R<23 >each independently represent a substituted or non-substituted alkyl group. When R21, R<22 >or R<23 >have a substituent, the substituent is a halogen atom etc. The non-photosensitive organic particles are prepared from organic acids including at least behenic acid and erucic acid, and a content of the erucic acid is 0.000001 mol % to 0.4 mol %.

The present invention relates to a resin composition for a plastic optical lens, and more specifically to a resin composition for a urethane optical lens having high thermal resistance and high reactivity. The resin composition for an optical lens of the present invention uses an optical resin prepolymer which is obtained from a preceding side reaction of a mercapto compound and a -SH / -NCO of isophorone diisocyanate or dicyclohexylmethanediisocyanate in appropriate mole ratios. The use of isophorone diisocyanate or dicyclohexylmethanediisocyanate results in enhancement of the thermal resistance of the optical lens, and the use of optical resin prepolymer at 20 to 70 weight % of the total weight of the resin composition for the optical lens, elutes the adhesive from adhesive tape due to lowered reactivity which results in a higher temperature reaction thereby resolving the problems of whitening phenomenon and foaming which occur on the edge of the lens due to a leak of the liquid composition when the reaction temperature increases.

Novel additive systems for lead-free filled cable insulation are disclosed. These systems provide improved electrical and mechanical properties. The base polymer may be metallocene based, non metallocene based or combinations thereof. The additives may contain one or more hindered amine light stabilizers, mercapto compounds, and optionally, amine antioxidants.

A program controlled microwave processes for preparing the quantum point of water-soluble CdTe includes such steps as mixing Cd salt (or oxide) with water-soluble mercapto compound in water phase, adding sodium (or potassium) tellurohydride to obtain the precursor solution, filling it in glass tube, and program controlled microwave irradiating in microwave reactor.

The present invention pertains to a process for sulfiding a catalyst composition comprising at least one hydrogenation metal component of Group VI and / or Group VIII of the Periodic Table, and an S-containing organic additive wherein the catalyst composition is contacted with hydrogen and a sulfur-containing compound in the gaseous phase, characterized in that the process is carried out ex situ. By carrying out the process ex situ, the formation of undesirable side compounds in the hydrotreating unit is prevented. Additionally, the reactor suffers less downtime, and the start-up of the reactor may be simplified. The S-containing organic additive preferably is a mercapto-compound, more preferably a mercaptocarboxylic acid represented by the general formula HS-R1-COOR, wherein R1 stands for a divalent hydrocarbon group with 1-about 10 carbon atoms and R stands for a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium, or a linear or branched alkyl group having 1 to about 10 carbon atoms. The invention also pertains to the catalyst made by the above process and a process for hydrotreating a hydrocarbon feed by contacting the feed with the catalyst at hydrotreating conditions.

The method refers to a temperature and pressure control microwave synthesis of water-soluble cobaltic-cobaltous oxide nanocrystal, using water as solvent, dissolving cobalt salt in water, adding water-soluble mercapto compound as stabilizer, controlling the mol ratio of cobalt ion and water-soluble mercapto compound as 1:10 to 1:1, adjusting solution's pH value to 5-12, getting precursor solution. Afterwards placing the precursor solution in hermetic polytetrafluoroethylene tank, reacting in microwave reactor of temperature and pressure controlled, quickly synthesize cobaltic-cobaltous oxide nanocrystal. The operation of this invention method is simple, the condition is gentle, the cost is low, and the synthetic product cobaltic-cobaltous oxide nanocrystal has the characters of good water-solubility, equal dimension distribution, adjustable size, high degree of crystallization and so on.

The invention relates to a biocatalytic desulfurization method for waste rubber. The target desulfurization method adopts a plurality of hydrosulphonyl (-SH) compound in a microbial cell to catalyze and fracture the chain of the cross bond of perduren. The method comprises the following steps that: cyclane is added into a solution containing a phase change catalyst drop by drop under the heating and high-speed stirring conditions to prepare an emulsion, vulcanized rubber powder is added into the emulsion and is stirred to ensure that the rubber powder swells sufficiently, after the process, the microorganism containing a mercapto-compound is added to perform the desulfurization reaction, after the reaction is over, the mixture is pumped, filtered as well as washed and dried to obtain the vulcanized rubber powder. In the method, the desulfurization efficiency is high, the desulfurization process is simple, the production cost is low, and the microorganism is easily available without special breeding. The desulfurized rubber powder can be directly plasticated and pressed to form and can be added into the novel rubber to prepare rubber products together with the novel rubber.

The invention relates to a method for rapid preparation of an organic-inorganic hybrid porous integral material based on photoinduced thiol-ene polymerization reaction. Specifically, the method includes: mixing a tetravinyl compound (functional monomer), a multi-mercapto compound (functional monomer), a pore-forming agent and a photoinitiator and conducting ultrasonic dissolution, then carrying out photoinduced thiol-ene polymerization reaction under the irradiation of an ultraviolet lamp with certain wavelength, thus obtaining the porous organic-inorganic hybrid integral material by one step. The preparation method has the advantages of mild conditions, high efficiency and controllability, etc., also can select different functional monomers according to different application requirements, or adjust the pore-foaming agent system to prepare a series of organic-inorganic hybrid integral materials with different physical and chemical properties.

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.