30results about How to "Self-catalyzed" patented technology

The invention relates to a master batch for improving durability of polyglycolide (PGA). The master batch is prepared from the following components in parts by mass: 100 parts of matrix resin, 30-300parts of an acid neutralizer, 5-50 parts of a carboxyl end-capping reagent, 5-50 parts of a hydroxyl end-capping reagent, 3-10 parts of an anti-hydrolysis agent, 0.5-2 parts of a grafting agent, 0.5-3parts of an auxiliary grafting agent, 1-5 parts of a dispersing agent and 0.5-2 parts of a compatilizer. The master batch for improving the durability of polyglycollide has the characteristics of convenience in processing and use and small addition amount, can be mixed with polyglycollide particles for injection molding or extrusion processing, and has an excellent effect in improving the durability and shelf life of a polyglycollide product in a room-temperature environment.

The invention discloses a phenol formaldehyde amine epoxy curing agent which is prepared from the following raw materials in parts by weight: 30-60 parts of N,N-di(3-aminopropyl)ethylenediamine, 5-30 parts of formyl compound and 20-60 parts of phenolic group compound. The combination of the curing agent and the epoxy resin has the advantages of very high scratch resistance, high wear resistance and high temperature resistance.

The invention provides an epoxy resin curing agent, a synthesis method and a curing method and belongs to the field of curing agent products. The epoxy resin curing agent is N,N'-bis(3-aminopropyl) ethanediamine and is synthesized from raw materials including ethanediamine, ketone, acrylonitrile and the like through multi-step reactions. The epoxy resin curing agent has high curing strength, wear resistance and scratch resistance and has a higher curing speed at a low temperature, a surface after curing is bright, is not prone to oxidation and has excellent yellowing resistance. The synthesis method of the epoxy resin curing agent is simple in process and convenient to control.

The invention relates to a waterborne epoxy curing agent for waterborne epoxy resin as well as a preparation method and an application method of the waterborne epoxy curing agent. Mercapto and amino groups are taken as curing reaction groups of the waterborne epoxy curing agent, a curing agent structure comprises a tertiary amine structure which can be dispersed or dissolved in water. Compared with a polyamine curing agent, the prepared quick-drying curing agent is faster in curing and better in impact resistance and can realize low-temperature curing; compared with a thiol curing agent, the prepared quick-drying curing agent is faster in curing, and hardness, bending performance and impact resistance of a film are improved remarkably.

The invention relates to autocatalytic and dealcoholized room-temperature vulcanized silicone rubber and a preparation method thereof. The room-temperature vulcanized silicone rubber is prepared from, by mass, 50-100 parts of terminal hydroxyl polydimethylsiloxane, 5-25 parts of filler and 0.3-5 parts of cross-linking agent. The room-temperature vulcanized silicone rubber can be rapidly cured without organo-tin compounds and other catalysts, the cost is reduced, the harm of the used organo-tin compound to the environment and organisms is also avoided, and therefore the application field of the silicone rubber. The room-temperature vulcanized silicone rubber using alpha-amine methyl triethoxysilane as a cross-linking agent is high in curing speed, good in mechanical property and excellent in thermal performance and has the advantages of being free of corrosion, low in energy consumption and free of pollution.

The invention relates to a preparation method of a monolithic polyaryletherketone bipolar membrane with a porphyrin hydrolysis catalytic group on a side chain. The preparation method comprises the following steps: respectively synthesizing polysulfone base membrane mixed solutions containing porphyrin and epoxy group side groups by taking bromomethylated polysulfone and a bromomethylated polysulfone polymer as starting raw materials, mixing the polysulfone base membrane mixed solutions, performing casting on a clean glass plate, and performing drying to obtain a polysulfone base membrane containing porphyrin and epoxy group side groups; and sulfonating, aminating and quaternizing the base membrane, and washing the base membrane with deionized water to obtain the monolithic polyaryletherketone bipolar membrane containing a phthalocyanine side group. According to the bipolar membrane prepared by the invention, through nucleophilic substitution reaction, an epoxy group is introduced intoa polysulfone side group, and anion and cation exchange membranes are introduced into a polysulfone molecular chain, so that a membrane forming process is omitted, and the use of carcinogen chloromethyl ether is avoided. The prepared bipolar membrane has a self-catalysis effect, and is low in resistance and low in transmembrane voltage. After long-term use, the problems of bubbling, cracking and the like of a middle interface layer, which are easily caused in the use process of a composite bipolar membrane, can be avoided.

The invention relates to a composite nano antibacterial fiber gauze fabric and a preparation process thereof. The gauze fabric is formed by weaving warp yarns and weft yarns, the warp yarns are formedby blending antibacterial fibers and cotton fibers, the weft yarns are formed by blending bamboo fibers and polyurethane fibers, and the antibacterial fibers are obtained by modifying polyester fibers with a composite nano material. The problems that in the research field of antibacterial textiles, a fabric after-finishing method is mainly adopted in a preparation method of the antibacterial textiles, so that an antibacterial layer is formed on the surface of a textile material, but an antibacterial fabric in the prior art is not long in service life and not ideal in antibacterial effect aresolved. The prepared antibacterial fibers and the cotton fibers with high air permeability are blended to form the warp yarns, the waterproof and anti-aging bamboo fibers and the polyurethane fibers with high elasticity are blended to form the weft yarns, and then the warp yarns and the weft yarns are woven to form the gauze fabric. The prepared gauze fabric has the advantages of being high in antibacterial property and lasting in antibacterial property.

The invention relates to a preparation method of a monolithic polysulfone bipolar membrane with a side group bonded with a porphyrin group. The preparation method comprises the following steps: respectively synthesizing a polysulfone-based membrane mixed solution containing porphyrin and epoxy group side groups by taking bromo-methylated polysulfone and a bromo-methylated polysulfone polymer as starting raw materials, mixing, casting on a clean glass plate, and drying to prepare a polysulfone-based membrane containing porphyrin and epoxy group side groups; and sulfonating, aminating and quaternizing the base membrane, and washing with deionized water to obtain the monolithic polyaryletherketone bipolar membrane containing the phthalocyanine side group. According to the bipolar membrane prepared by the method, an epoxy group is introduced into a polysulfone side group through nucleophilic substitution reaction, and anion and cation exchange membranes are introduced into a polysulfone molecular chain so that a membrane forming process is omitted, and the use of carcinogen chloromethyl ether is avoided. The prepared bipolar membrane has a self-catalysis effect, and is low in resistance and low in transmembrane voltage. And after long-term use, the problems of bubbling, cracking and the like of the middle interface layer, which are easily caused in the use process of the compositebipolar membrane, can be avoided.

The invention relates to a preparation method of a monolithic polysulfone bipolar membrane with a side group bonded with a phthalocyanine catalytic group. The preparation method comprises the following steps: taking a bromomethylated polysulfone polymer as a starting raw material, respectively synthesizing an epoxy group-containing substituent polysulfone polymer and a polysulfone side group bonded phthalocyanine polymer, mixing the epoxy group-containing substituent polysulfone polymer and the polysulfone side group bonded phthalocyanine polymer, casting on a clean glass plate, and drying toprepare a polysulfone-based membrane containing a phthalocyanine group side group and an epoxy group side group; and sulfonating, aminating and quaternizing the base membrane, and washing with deionized water to obtain the monolithic phthalocyanine group-containing polysulfone bipolar membrane. According to the bipolar membrane prepared by the method, an epoxy group is introduced into a polysulfone side group through nucleophilic substitution reaction, and anion and cation exchange membranes are introduced into a polysulfone molecular chain so that a membrane forming process is omitted, and the use of carcinogen chloromethyl ether is avoided. The prepared bipolar membrane has a self-catalysis effect, and is low in resistance and low in transmembrane voltage. And after long-term use, the problems of bubbling, cracking and the like of the middle interface layer, which are easily caused in the use process of the composite bipolar membrane, can be avoided.

The invention discloses an autocatalytic alkyd resin and a preparation method thereof. The preparation method comprises the following steps: putting glycerol, benzoic acid, soya-bean oil acid, phthalic anhydride, a color reducer, xylene and a self-made drier into a four-necked flask; conducting heating to a reflux state by using a heating jacket, conducting reacting at 180-200 DEG C for 3 hours, separating out water, then conducting heating to 200-210 DEG C, conducting reacting for 5 hours, conducting cooling to 100 DEG C when the acid value is 10-20 mgKOH/g, adding xylene, and conducting stirring to obtain the self-catalytic alkyd resin. According to the alkyd resin, a group with a drying effect is introduced, self-catalysis is realized, the drying time of PU paint can be shortened without adding a drier when the paint is prepared, compared with an additional drier, the catalytic effect is more stable, the problem that the glossiness of a paint film is not uniform due to non-uniform precipitation and dispersion of an additional drier is avoided, the polishing property and yellowing resistance of the primer are improved, and the later paint preparation cost of a client is reduced.

The invention discloses a chemical nickel-gold process of a wafer aluminum-copper base material applied to the field of IGBT power devices. The chemical nickel-gold process comprises a process flow, an activating solution formula, a chemical nickel formula, a chemical gold formula and the like. The technological process comprises the steps of oil removal, water washing, micro-etching, water washing, presoaking, activation, water washing, vacuum water washing, dry ice spray washing, thin copper electroplating, water washing, chemical nickel plating, water washing and chemical gold plating. The formula of the activating solution comprises ruthenium salt, platinum salt, concentrated sulfuric acid, a surfactant, a stabilizer, a complexing agent and a dispersing agent. The nickel plating formula comprises nickel salt, a complexing agent, a brightening agent, a reducing agent, a stabilizing agent, a bridging agent and a carrying agent. The gold plating formula comprises gold salt, a complexing agent, a stabilizing agent, an underpotential agent, a reducing agent and a nucleating agent. The excellent chemical nickel-gold plating process of the wafer aluminum-copper base material in the field of IGBT power devices can be realized, and the chemical nickel-gold plating process has the characteristics of being excellent in stability, bright and smooth, free of skip plating and diffusion plating, good in oxidation resistance, good in weldability and the like.

An ionic silicone gel antifouling coating, comprises an A component and a B component: The A component includes di-polyethylene glycol-terminated polydimethylsiloxane, hydroxyl-terminated polydimethylsiloxane, a pigment and a solvent. The B component includes bis[3-(triethoxysilyl)propyl]amine, zwitterionic acrylic monomer and solvent. A preparation method of the antifouling coating includes the preparation method of the A component and the B component. The preparation method of the A component is: stir and disperse the polydimethylsiloxane, the solvent and the pigment that are capped with two polyethylene glycol: The preparation method of the B component is: under the conditions of anhydrous, nitrogen atmosphere and 35 DEG C, bis[3-(triethoxysilyl)propyl]amine, zwitterionic acrylic monomer and solvent are ultrasonically dispersed.

The invention discloses a method for fast preparing TiO2/SiO2 composite aerogel through autocatalysis alcoholysis. The method is characterized by comprising the following steps of (1) TiO2/SiO2 composite sol preparation: taking absolute ethyl alcohol; dropwise adding titanium tetrachloride in a continuous stirring way to form a solution A; then, dropwise adding silicon tetrachloride into the solution A; finally, dropwise adding ammonia water with the concentration being 0.1 to 0.5 mol/L; performing hydrolysis at room temperature to prepare TiO2/SiO2 composite sol; (2) TiO2/SiO2 composite gel preparation: performing stirring for 20 to 30min in a water bath being 60 to 80 DEG C; performing still standing at room temperature for 0.5 to 1h until gelatination is realized; obtaining TiO2/SiO2 composite gel; (3) TiO2/SiO2 composite gel aging and solvent replacement: putting the TiO2/SiO2 composite gel into a water bath pot being 40 to 60 DEG C; performing solvent replacement by an analytically pure absolute ethyl alcohol solution; changing the absolute ethyl alcohol once every 2 to 4h; performing replacement for 24h; (4) TiO2/SiO2 composite gel drying: performing supercritical drying on the TiO2/SiO2 composite gel subjected to solvent replacement by the absolute ethyl alcohol; obtaining the TiO2/SiO2 composite aerogel.

The invention relates to the technical field of waterborne polyurethane, and discloses a high-solid-content waterborne polyurethane dispersoid as well as a preparation method and application thereof.The high-solid-content waterborne polyurethane dispersoid is prepared from the following raw materials: 40-55% of bio-based hyperbranched polyurethane, 0.5-5% of a neutralizing agent, 0.5-5% of a sulfonate chain extender and the balance of water; the preparation method comprises the following steps: reacting organic acid anhydride with tris (hydroxymethyl) aminomethane in a solvent to prepare a hyperbranched chain extender; vegetable oil, diisocyanate and high polymer dihydric alcohol are subjected to a reaction to prepare a bio-based branched polyurethane prepolymer, a hyperbranched chain extender is added into the system for a reaction, and the bio-based hyperbranched polyurethane is obtained. The solid content of the dispersion can reach 50%-65%, the particle size of the dispersion is smaller than 250 nm, the dispersion can be stably stored for a long time, meanwhile, the dispersion has the characteristics of high solid content, bio-based raw materials, no solvent and autocatalysis, and the dispersion has important significance on industry development.