1505 results about "Coupling reagent" patented technology

The present invention is generally directed to methods of producing an increase in the enrichment or recovery of preferred forms of IgG proteins. More particularly, the invention relates to subjecting preparations of such recombinant IgG proteins with a reduction/oxidation coupling reagent and optionally a chaotropic agent.

A placement guide apparatus with an improved hydration inducing plug used in coupling a noninvasive analyzer to a sampling site to determine analyte in the human body is disclosed. The hydration inducing plug includes at least one fluoropolymer that may be used as a coupling agent. The guide apparatus may further include an automated or semi-automated coupling fluid delivery system. Use of either of these couplers mitigates issues associated with related technology and enhances noninvasive analyte measurements, such as a near-IR diffuse reflectance based noninvasive glucose concentration analyzer.

Coupling reactions, suitable for use in organic or aqueous media, are performed by contacting a 1,2,4,5-tetrazine with a dienophile. The dienophile may be covalently bonded to a protein, and the coupling reaction may be performed in biological media such as those containing cells or cell lysates. The reactions may be performed in the presence of primary amines, thiols, acetylenes, azides, phosphines, and products of Staudinger and/or Sharpless-Huisgen reactions Novel 3-substituted cyclopropene compounds and trans-cyclooctenes are exemplary dienophiles for these reactions.

The invention discloses a preparation method and usage of a modified attapulgite adsorption material. The method comprises the following steps: modifying attapulgite which has undergone purification and acid activation with an amino-silane coupling agent so as to introduce amino onto the surface of attapulgite; subjecting amino and excess acrylic acid ester to a Michael addition reaction so as tointroduce ester groups, subjecting introduced ester groups and polyethylene polyamine to a Michael addition reaction, carrying out underpressure distillation to remove a solvent and excess reactants,and carrying out vacuum drying, grinding and sieving to obtain a finished product. According to the invention, polyethylene polyamine or alcamine compounds are bonded to the surface of attapulgite through covalent bonds, thereby substantially improving adsorption performance of attapulgite to metal ions.

This invention relates generally to the field of production of coated magnetizable microparticles and uses thereof. In particular, the invention provides a process for producing coated magnetizable microparticles with active functional groups, which process uses, inter alia, conducting polymerization of said coating monomers on the surface of magnetic particle to form coated magnetizable microparticles with active functional groups in the presence of a coupling agent, coating monomers, a functionalization reagent, a cross-linking agent and an initiator in an organic solvent containing a surfactant. The coated magnetizable microparticles produced according to the present processes and uses of the coated magnetizable microparticles, e.g., in isolating and/or manipulating various moieties are also provided.

The invention discloses a moistureproof type low-smoke halogen-free flame-retarding wire and cable insulation material used for building. The insulation material comprises components, by weight, 100 parts of vinyl copolymer and/or ethylene propylene rubber, 100-250 parts of halogen-free flame retardants, 1-20 parts of compatilizer, 0.3-5 parts of antioxygen, 0.5-5 parts of lubricants, 0-3 parts of coupling reagents, 0-2 parts of dispersing agents, and 2-20 parts of one or more of vinyl silicone oil, silicone, silicone grease, silicone rubber, and mineral oil. Wires made of the material is low in smoke, free of halogen, incapable of releasing poisonous gas. Flames can be retarded due to the fact that a single stick of wire can vertically combust at combusting time. Moreover, some special addition agents are added in materials of insulation layers or protective sleeve layers, so that the surface hydrophobic property of products is increased and can be used in a high-temperature humid environment for a long time, and short circuit accidents caused by moisture absorption of the wire insulation layers are avoided.

The invention relates to a preparation method of polyamide fiber with a uvioresistant function. The method comprises the following process steps: (1) grinding and mixing titanium dioxide, silicon dioxide and zinc oxide to obtain a mixture, and modifying the mixture by adopting a titanate coupling reagent so as to obtain a modified uvioresistant screening agent; (2) mixing the modified uvioresistant screening agent and polyamide slices, and performing melt extrusion pelleting in a twin-screw extruder so as to obtain uvioresistant master batches; (3) blending the uvioresistant master batches and the polyamide slices to obtain a mixture I, performing heating melting on the mixture I in the twin-screw extruder, and forming long polyamide yarns in an extruding manner from a yarn spraying port of a spinning manifold; (4) quenching and bundling the long polyamide yarns, so as to obtain yarn bundles, and performing primary tensioning, annealing and secondary tensioning on the yarn bundles so as to obtain the polyamide fiber. The polyamide fiber obtained by adopting the method has the good uvioresistant performance, and has the high wearing resisting performance.

The invention relates to a preparation method of an inorganic/organic hybridization antibacterial film. The preparation method mainly comprises the steps of: (1) preparing a nano-silver-loaded molecular sieve germicide with stronger stability by ion exchange and a chemical reduction method; and preparing a molecular sieve/polymer hybridization antibacterial film loaded with nano-silver particles by a phase transformation film preparation process; and (2) taking N,N-dimethylformamide as a solvent and a reducing agent simultaneously, reducing silver ions to nano-silver serving as an antibacterial function body in a film casting liquid system in situ, and firmly loading the nano-silver in a polymer porous matrix material by a dispersion action and a coupling action of a coupling agent so as to form a nano-silver-loaded polymer porous film. The hybridization antibacterial film, provided by the invention, keeps excellent water flux, high retention rate and tough mechanical intensity, and has excellent antibacterial function, and can effectively solve the problems of loss of the silver ions of the silver-ion-loaded molecular sieve in the membrane filtration, loss of the nanometer inorganic particles in the polymer porous matrix, easy pollution of a separation film by microorganisms, and the like.

Methods, devices and systems are provided herein for surfaces for de novo polynucleotide synthesis that provide for increased polynucleotide yield. Surfaces described herein comprise a texture that increases surface area provide for increased polynucleotide yield compared to non-textured surfaces. In addition, the patterned placement of nucleoside coupling reagent spanning such surfaces provides for improved synthesis yield, representation, and a reduction in contamination on the surface between different polynucleotide species.

The invention relates to the technical field of self-repairing anticorrosive paints and particularly relates to a self-repairing microcapsule used for a metal anticorrosive paint and a preparation method of the self-repairing microcapsule. The self-repairing microcapsule sequentially comprises a capsule core material and double layers of wall materials from inside to outside, a corrosion-inhibiting material is loaded between the double layers of wall materials, a coupling reagent is adhered on an outer wall of the double layers of wall materials, wherein the capsule core material is a reactant of a polyhydroxyl or multiamino compound and isocyanate, an inner wall of the double layers of wall materials is polyurethane, the outer wall of the double layers of wall materials is melamine formaldehyde resin, and the corrosion-inhibiting material is a nanoparticle and a metal corrosion inhibitor. The microcapsule is high in repairing efficiency, stable in mechanical property and simple in process, is matched with a matrix, has extensive applications, and can be widely applied to the fields of metal anti-corrosion and self-repairing materials like the petrochemical engineering, the marine industry and the automobile industry.

The invention discloses an adsorbent for adsorbing heavy metal ions, and the preparation method of the adsorbent. The invention is characterized in that a silane coupling agent and acid anhydride are in epoxy ring cleavage reaction in inert atmosphere or air at the temperature of minus 78 to 200 DEG C, wherein the mol ratio of the silane coupling agent to the acid anhydride is 1 : 2 to 20; after the reaction product is dissolved by a solvent, halogenated alkane is added to the solution according to the mol ratio of two to ten times of the silane coupling agent, the amination reaction is carried out at the temperature of 0 to 200 DEG C, and then, the product generated by the amination reaction is cleaned with water or ethanol and is dried to obtain the adsorbent for adsorbing the heavy metal ions. In the adsorbent, acidic groups are arranged on both sides of a molecular backbone, and basic groups are positioned on the molecular backbone. The adsorbent has stronger capability for adsorbing heavy metal ions, such as Pb2+, Cu2+ and the like in the solution, and can be used for adsorption separation and purification treatment of waste water containing heavy metal ions.

The invention discloses a long glass fiber enhanced polypropylene composite material with low shrinkage and low warpage, a preparation method thereof, and application of the long glass fiber enhanced polypropylene composite material in manufacturing an automobile tail door sheet. The composite material is prepared from the following raw materials in parts by weight: 30-80% of polypropylene, 10-60% of continuous glass fiber, 3-10% of compatilizer, 0.1-1.5% of antioxidant, 0.1-1% of lubricating agent, 0.5-3% of coupling reagent, 0.1-2% of nucleating agent, 5-20% of zinc oxide whisker and 0.5-3% of glass bead. The zinc oxide whisker, the nucleating agent and the glass bead are compounded, so that the composite material achieves an ideal enhancement effect, the differential degree of glass fiber along a fiber glass orientation between a flowing direction and a vertical flowing direction in a polypropylene matrix is reduced, and the shrinking percentage and the warping degree of the composite material can be obviously lowered. The long glass fiber enhanced polypropylene composite material can be used for manufacturing the automobile tail door sheet.

The invention relates to a quaternary amino cation modified polysiloxane softening agent and a preparation method thereof. The structural formula of the softening agent is A1BA2. The preparation method comprises the following steps: (1) mixing hydroxy silicone oil and silane coupling agent according to a molar ratio of 1:1-1:4, and carrying out reaction on the mixture for 4 to 24 hours at the temperature of between 25 and 105 DEG C to obtain an amino terminated siloxane intermediate; (2) carrying out reaction on the amino terminated siloxane intermediate and epoxy quaternary ammonium salt for 2 to 10 hours in a solvent under the protection of nitrogen during the whole reaction, and finally vacuumizing the mixture and removing partial solvent to obtain a sticky transparent modified polysiloxane product; and (3) diluting the modified polysiloxane product by water and organic acid to obtain transparent emulsion, and adding an emulsifying agent which is 5 to 10 percent of weight of the emulsion into the emulsion to obtain a product. Compared with the prior art, the softening agent has the advantages of good softness, fluffy feeling, hydrophilicity, extremely low yellowing property, and the like.

The present invention relates to novel sulfoperoxycarboxylic acid compounds, and methods for making and using them. The sulfoperoxycarboxylic compounds of the invention are storage stable, water soluble and have low to no odor. Further, the compounds of the present invention can be formed from non-petroleum based renewable materials. The compounds of the present invention can be used as antimicrobials, and bleaching agents. The compounds of the present invention are also suitable for use as coupling agents.

The invention discloses a cold-stirring cold-paving type epoxy modified asphalt material and a preparation method thereof. The cold-stirring cold-paving type epoxy modified asphalt material is composed of a main ingredient A and a curing agent B; the main ingredient A comprises the following components in parts by weight: 0-50 parts of epoxy resin, 40-90 parts of flexibilizer, 5-15 parts of reactive diluent, 10-40 parts of asphalt, 10-40 parts of active bulking agent and 0-5 parts of coupling reagent; the curing agent B comprises the following components in parts by weight: 0-100 parts of flexible curing agent, 0-100 parts of alicyclic amine curing agent and 0-10 parts of accelerant; and the ratio of the main ingredient A to the curing agent B is (1-5):1. The invention utilizes a self-assembly behavior of the active bulking agent on the surface of asphalt particles to solve the problem of compatibility between weak polar asphalt and strong polar epoxy resin. A flexible chain segment is introduced into an epoxy asphalt three-dimensional structure network by the flexibilizer and the flexible curing agent, so that the fatigue toughness of the epoxy asphalt material is greatly promoted and the secondary cracking phenomenon caused by insufficient toughness is effectively restrained.

The invention relates to a method for synthesizing a silicon dioxide cladded organic-inorganic perovskite structure quantum dot and application of the quantum dot synthesized by the method, and belongs to the field of nano-material synthesis. The method comprises the following steps: taking methylammonium halide and lead halide as raw materials and taking oleic acid and an amino-containing silane coupling agent as ligands to synthesize the stable and efficient silicon dioxide cladded organic-inorganic perovskite structure quantum dot, which is capable of being processed in a solution, in one step through a solution method at room temperature. According to the method provided by the invention, the stability of the quantum dot is greatly increased through silicon dioxide cladding; meanwhile, high fluorescent quantum efficiency of the quantum dot is ensured and can reach 95 percent at maximum. Meanwhile, the quantum dot prepared by the method can be dispersed into solvents including toluene and the like to form a stable solution. A quantum dot solution and a toluene solution of polystyrene are mixed and can be used for preparing a warm white-light light emitting diode; the prepared white-light light emitting diode has a color coordinate (0.38, 0.43) and color temperature of 4500K, and can be applied to various fields including information storage, information encryption, counterfeiting prevention, illumination display and the like.

The invention provides methods of increasing yields of desired conformation of proteins. In particular embodiments, the invention includes contacting preparations of a recombinant protein with a reduction/oxidation coupling reagent for a time sufficient to increase the relative proportion of a desired configurational isomer.

The invention belongs to the technical field of yield increasing and fracturing of petroleum engineering and provides a method for preparing a self-suspension propping agent in a laboratory. The method comprises the following steps: taking quartz sand/ceramsite/propping agent as aggregates; pre-treating with an organic solvent and treating the surface with a coupling reagent; polymerizing and coating; and crushing, drying, pelletizing and then packaging. A coating polymerizing product (as shown in the figure) is acquired through the polybasic polymerization of the reactant and acrylamide/sodium acrylate/functional monomer/cross-linking agent. The expansion times of the prepared self-suspension propping agent is 3-12 times; the self-suspension propping agent can be completely hydrated within 1min-2min; the hydrated layer is stably expanded at 2 DEG C to 193 DEG C; the self-suspension propping agent swells once encountering with water, the volume density is reduced from 2.4g/cm3 to 1.3g/cm3 and the excellent self-suspension characteristic after the clean water system swelling is presented. The self-suspension propping agent prepared in the laboratory can realize the onsite mixing for hydraulic fracturing construction, the water for fracturing is greatly reduced, the labor cost is lowered and the application prospect is wide.

The present invention relates to A three-dimensionally networked silica composed of silica particles of 0 to 100 nm combining by bridge chains of aliphatic, aromatic, polyimine, peptide, and polyether groups. When the networked silica of the present invention can be used to rubber compounds, the compounds brought about considerable increases in tensile strength and elongation at break, compared to those of the rubber compounds reinforced with silica and the conventional coupling reagents.