486 results about "Low temperature curing" patented technology

The invention discloses silver powder with coexisting submicron sheets and nano-particles and a preparation method of the silver powder, and belongs to the technical field of silver powder preparation. A silver nitrate solution is added into a dispersing agent solution, then a directional end-capping reagent solution is added, and nucleation and growth of submicron sheets and nano-particles are controlled through the types of dispersing agents, the types of directional end-capping reagents, the temperature gradient and the like. The diameter of the prepared flaky silver powder ranges from 0.1 micrometer to 1.5 micrometers, the thickness of the flaky silver powder ranges from 30 nm to 120 nm, and the flaking rate ranges from 30% to 90%. And the particle size of the spherical silver powder is 30-150 nm. According to the preparation method of the silver powder, a silver nanocrystal seed solution does not need to be prepared independently, and the silver powder is different from common silver powder with single morphology, can be used for preparing the flake-shaped and particle-shaped coexisting silver powder in one pot, and is suitable for being used as a conductive functional phase of low-temperature curing type electronic paste.

The invention discloses a preparation method of an ultra-infiltration nano coating, and relates to the field of ultra-infiltration nano coatings, and the preparation method comprises the following steps: S1, base material pretreatment, S2, nano material dispersion liquid preparation, S3, coating: adopting an impregnation method, a spraying method or a spin-coating method to attach the nano material dispersion liquid prepared in the step S2 to the surface of the base material pretreated in the step S1, and S4, low-temperature curing to obtain the ultra-infiltration nano coating. And S5, surface modification: carrying out hydrophobic modification or hydrophilic modification on the base material subjected to low-temperature curing in the step S4 according to the type of the base material. The effect of enhancing the adhesive force of the base material and the coating is achieved through the means of pretreating the base material, it is ensured that nano particles of the dispersion liquid are always uniformly dispersed through preparation of the nano material dispersion liquid and the coating, coating is conducted through proper methods such as dipping, spraying and spin coating, and then low-temperature curing is conducted; the effect of constructing a stable porous nano-structure coating with excellent performance is achieved, and meanwhile, different requirements are met through multiple coating modes.

The invention discloses a low-temperature curing high-throwing-power cathode electrophoretic coating and a preparation method and application thereof, and belongs to the field of automobile coating materials, the coating is composed of epoxy resin, a fluorosilicone copolymerization type epoxy modifier, a polyamino siloxane-acrylic acid hybrid and other components, and performance improvement is achieved through the synergistic effect of the two brand-new modifiers. Wherein the fluorine-silicon copolymerization type epoxy modifier is prepared by taking bisphenol A epoxy resin as a framework, introducing fluorine-containing alkyl and siloxane groups and carrying out ultraviolet reaction, so that the surface energy is reduced, and low-temperature crosslinking is promoted; the polyamido siloxane-acrylic acid hybrid takes siloxane as a core, and acrylic acid and polyamido are bridged through isocyanate, so that the crosslinking density and the water solubility are enhanced. When the coating is prepared, the two modifiers are mixed with epoxy resin, a solvent and the like, and the coating is prepared through dispersion and dilution. The coating can be cured at low temperature, so that a uniform thick film is obtained in an inner cavity of a complex workpiece, and meanwhile, the coating has excellent corrosion resistance and adhesive force and is suitable for efficient and environment-friendly coating of an automobile body and parts.

The invention discloses a low-temperature curing PVC plastisol composition for a vehicle and a preparation method of the low-temperature curing PVC plastisol composition. The invention relates to a low-temperature curing PVC plastisol composition for vehicles, which is prepared from the following raw materials in parts by weight. Comprising 5 to 15 parts of polyvinyl chloride-vinyl acetate copolymer resin, 5 to 15 parts of homopolymerized PVC paste resin, 1 to 10 parts of blended PVC paste resin, 30 to 40 parts of a compound plasticizer, 1 to 10 parts of a hydrocarbon solvent, 0.5 to 1.5 parts of terminated polyurethane, 0.5 to 2 parts of polyamide, 0.5 to 1 part of a thixotropic agent, 30 to 45 parts of an inorganic filler, 1 to 5 parts of a stabilizer and 1 to 5 parts of a moisture absorbent. The compound plasticizer is prepared from diethylene glycol dibenzoate, isodecyl benzoate and diisononyl phthalate. The PVC plastisol composition disclosed by the invention is a low-temperature and short-time curing material, and can be cured under the conditions that the baking temperature is 125 DEG C and the baking time is 20 minutes.

The invention relates to the technical field of coatings, in particular to a low-temperature curing anticorrosive coating and a preparation method thereof. The coating is composed of a component A and a component B, and the mass ratio of the component A to the component B is 100: (3-50.8); the component A comprises the following components in parts by weight: 25-35 parts of epoxy resin, 40-72 parts of pigment filler, 2.3-4.5 parts of an auxiliary agent and 10-14 parts of a solvent; the component B is a modified phenolic aldehyde amine curing agent; the epoxy resin is used as a main film-forming substance and is matched with the modified phenolic aldehyde amine curing agent to prepare the low-temperature curing epoxy coating, so that the problem that the epoxy coating cannot be cured at the temperature lower than-10 DEG C is solved, and a coating formed by the coating provided by the invention has good mechanical properties, salt spray resistance, high and low temperature resistance and the like.

The invention discloses low-temperature curing silver-coated copper composite slurry and a preparation method thereof. The conductive adhesive comprises the following raw material components in percentage by weight: 60-80% of conductive phase, 2-2.8% of adhesive, 5-10% of resin and 3-8% of additive, and 20%-30% of a solvent. Wherein the conductive phase is formed by compounding spherical silver-coated copper powder and flaky silver powder, and the silver content is reduced and the sheet resistance of the silver-coated copper composite conductive paste is below 25m omega / square through a copper matrix surface silver plating process. A step-by-step mixing technology is adopted in the preparation process, resin and a solvent are dispersed at a high speed at 60 DEG C, then conductive powder is introduced to avoid agglomeration, and a uniform and compact conductive network is finally formed after grinding. After being cured at the low temperature of 130-180 DEG C, the paste has excellent adhesive force and durability, can be applied to the fields of heterojunction solar cells, flexible circuits and the like, and remarkably improves the photoelectric conversion efficiency and the processing adaptability.

The invention relates to the technical field of coatings, in particular to a low-temperature curing type fluorocarbon coating for an aluminum alloy and a preparation method of the low-temperature curing type fluorocarbon coating. The preparation method comprises the following steps: adding eugenol, potassium carbonate and decafluorobiphenyl to obtain modified biphenyl; and adding m-chloroperoxybenzoic acid to prepare the reinforcing agent. And performing surface modification on the linear silicon dioxide filler, the flaky silicon dioxide filler and the dendritic silicon dioxide filler by using gamma-epoxypropoxy propyl trimethoxy silane to obtain the epoxy modified wear-resistant filler. The preparation method comprises the following steps: adding epoxy resin and the epoxy modified wear-resistant filler into xylene, ultrasonically stirring, adding fluorocarbon resin, a reinforcing agent and a curing agent, and continuously ultrasonically stirring to obtain the fluorocarbon coating. The fluorocarbon coating prepared by the invention has good adhesion performance, wear resistance and mechanical strength, so that the fluorocarbon coating has a wide application prospect in the technical field of coatings.

The invention relates to the field of photovoltaic cells, and particularly discloses low-temperature cured copper paste and a preparation method and application thereof. The copper paste is prepared from the following raw material components in parts by weight: 85 to 95 parts of copper powder, 2 to 8 parts of a carrier, 2 to 5 parts of a solvent, 0.1 to 3 parts of a curing agent, 0.01 to 0.05 part of an accelerant, 0.5 to 1.5 parts of zinc borate, 0.1 to 0.5 part of nickel nitrate, 0.05 to 0.15 part of ethylenediamine, 0.05 to 0.15 part of diammonium hydrogen phosphate and 0.1 to 0.3 part of citric acid, wherein the purity of the copper powder is 99%-99.9%. The preparation method of the low-temperature cured copper paste comprises the following steps: respectively adding the curing agent, the accelerant, the solvent, the zinc borate, the nickel nitrate, the ethylenediamine, the diammonium hydrogen phosphate, the citric acid and other raw materials into the carrier, uniformly stirring and mixing, then adding the copper powder, mixing and stirring, grinding, and stirring to obtain the low-temperature cured copper paste.

The invention provides a preparation method and application of a novel crystal glass surface nano self-cleaning coating, and belongs to the technical field of self-cleaning coatings, the method comprises the following steps: (1) pretreatment of a base material: cleaning the glass surface by adopting oxygen plasma, removing organic matters and activating; (2) spraying a bottom coating: mixing 10-15 parts of nano silicon dioxide sol and 3-5 parts of a silane coupling agent, and curing at 120-150 DEG C for 30 minutes after spraying; (3) coating a functional layer; and (4) post-treatment: after ultraviolet curing, carrying out heat treatment at 180-200 DEG C for 10 minutes to form a compact cross-linked structure. Through material innovation (such as nitrogen-doped titanium dioxide and a dynamic disulfide bond ultraviolet light absorber) and process optimization (low-temperature curing and electrostatic atomization), the three major problems of single function, short service life and complex process of a traditional coating are solved, meanwhile, the coating is expanded to the scenes of photovoltaics, automobiles, buildings and the like, and the comprehensive advantages of being efficient, self-cleaning, long-acting, durable and environmentally friendly are achieved.

The invention discloses a low-temperature curing photoresist applied to a flexible display panel and a preparation method of the low-temperature curing photoresist, and belongs to the technical field of energy conservation and environmental protection. The photoresist is prepared by compounding a reactive organic-inorganic mixed nano filler, a photosensitive resin matrix, a benzocyclobutenyl silicone oligomer (BSA resin) and an additive. The preparation method comprises the following steps: preparation and surface modification of the nanofiller; synthesizing a photosensitive resin matrix; compounding the oligomer with an additive; dispersing the slurry and adding a nano corrugated template; spin coating, ultraviolet pre-curing, low-temperature baking and heat post-curing are carried out. The curing temperature of the photoresist is lower than 120 DEG C, the resolution ratio is superior to 3 microns, and the bending tolerance frequency is gt; the adhesion strength is gt after 20000 times; 15 Kgf / cm < 2 >, and the water vapor permeability is lt; 10 <-6 >, heat resistance gt; the temperature is 150 DEG C, and the dielectric constant is lt; 3.5, VOC (Volatile Organic Compounds) emission lt; the organic light-emitting material has excellent flexibility, thermal stability and environmental protection performance, is suitable for a pixel definition layer of an OLED flexible display panel, and improves the light extraction efficiency and the anti-fatigue performance.

The invention discloses an anti-natural gas hydrate coating which is obtained by coating the inner surface of a pipeline with a coating which can release phase change latent heat when the temperature drops and then curing the coating at low temperature, and the coating comprises the following raw materials in percentage by mass: 100% of dimethyl sulfoxide aqueous solution, 10% of gelatin and 10% of waterborne polyurethane. The mass fraction of the dimethyl sulfoxide aqueous solution is 60-90 wt%, the mass fraction of the waterborne polyurethane is 5-20 wt%, and the balance is gelatin. When the temperature drops, latent heat of phase change can be released, delayed freezing of the hydrate is achieved, the adhesive force of the hydrate is reduced, the self-repairing characteristic is achieved, and the problems that due to the too low temperature, the hydrate and the surface structure of the super-hydrophobic coating are mechanically interlocked, and the interior of the surface texture is coagulated are solved; and the problem of poor recycling performance of the existing super-hydrophobic coating is also solved.

The invention discloses a low-temperature curable bismaleimide resin-based composite material surface film and a preparation method thereof, relates to the field of bismaleimide resin composite material surface films, and aims at solving the problem that the curing temperature of an existing bismaleimide resin composite material surface film is too high. The surface film is composed of bismaleimide resin, an allyl compound, thermoplastic resin, a catalyst and a fluidity control agent. The preparation method comprises the following steps: adding the allyl compound into a reaction kettle, heating and stirring, adding the thermoplastic resin, cooling, adding the bismaleimide resin, continuously heating and stirring, and carrying out double-roller hot rolling film forming on the bismaleimide resin and a carrier for manufacturing an adhesive film through an adhesive film machine to prepare the low-temperature curable bismaleimide resin surface film.

The invention discloses a preparation method of low-temperature solderable conductive copper paste, and belongs to the technical field of electronic materials. The conductive copper paste is prepared from the following raw materials: silver-coated copper powder, an organic carrier, an antioxidant, a curing agent, an auxiliary agent, a thixotropic agent, a solvent and an adhesion enhancer. The design of the composite copper powder coated with the silver layer on the surface is matched with the graded particle size, and an organic carrier is combined, so that high conductivity and strong oxidation resistance under low-temperature curing are realized. The preparation method comprises the following steps: treating the copper powder by adopting a dipping-drying process, and coating the surface of the copper powder with the adhesion enhancer and the antioxidant by adopting a chemical method; uniformly mixing the organic carrier, the curing agent, the solvent and the auxiliary agent; and finally, copper powder and a thixotropic agent are added into the mixed organic carrier, and the low-temperature solderable conductive copper paste is prepared through high-speed dispersion and grinding of a three-roller machine. The product can be rapidly cured at 100-180 DEG C, the sheet resistance is smaller than or equal to 20 m omega / square, the welding strength reaches 15 MPa or above, cost is low, production is easy, and wide industrial application value is achieved.

The invention belongs to the technical field of coatings, and discloses a preparation method and application of a low-temperature fast-curing coiled material powder coating, and the preparation method comprises the following steps: S1, adding raw materials of the low-temperature fast-curing coiled material powder coating into a high-speed mixer, and mixing for 5-8 minutes at the rotating speed of 1200-1600r / min to ensure that the components are uniformly dispersed; s2, adding the mixture into a double-screw extruder for melt extrusion, wherein the temperature of the double-screw extruder is 80-90 DEG C in a first area, 100-110 DEG C in a second area, 120-130 DEG C in a third area and 110-120 DEG C in a fourth area, and the rotating speed is 200-250 r / min; s3, tabletting and cooling to 40 DEG C or below, after coarse crushing, adopting an ACM pulverizer and a grading screen of 80-120 meshes to obtain the low-temperature fast-curing coiled material powder coating, low-temperature curing and fast film forming are achieved through component cooperation, the process adaptability is high, meanwhile, functional filler modified sericite and modified nanometer aluminum oxide are added, and the low-temperature fast-curing coiled material powder coating is prepared. The two synergistically enhance the corrosion resistance, mechanical strength and environmental adaptability of the powder coating paint film.

The invention discloses low-temperature curing conductive paste as well as a preparation method and application thereof. The low-temperature curing conductive paste is prepared from the following components in percentage by mass: 88 to 95 weight percent of micro-nano powder, 2 to 4.5 weight percent of adhesive, 2 to 5.5 weight percent of solvent and 0.5 to 2 weight percent of auxiliary agent, wherein the adhesive comprises an end-capped bifunctional disubstituted urea curing agent of which the deblocking temperature is less than or equal to 80 DEG C, and a compound of epoxy resin and hydroxyl resin; the micro-nano powder comprises silver-coated copper powder and spherical silver powder subjected to surface treatment, the silver content of the silver-coated copper powder is 3-25 wt.%, the D50 of the silver-coated copper powder is 1-10 microns, and the D50 of the spherical silver powder is 0.1-1 micron and is treated by hydroxyl-containing aliphatic alcohol or ether. The conductive paste provided by the invention can be cured at low temperature and still has high conductivity, and the application problem of traditional conductive silver paste in perovskite solar cells is solved.

The invention discloses low-temperature anti-oxidation conductive copper paste, a preparation method and an RFID tag, and relates to the field of conductive paste. The modified copper powder comprises: copper powder; the cysteamine self-assembly molecular layer is formed by coupling sulfydryl of cysteamine with the surface of the copper powder; the metal phthalocyanine complex molecular layer is coordinated with central metal ions of metal phthalocyanine molecules through amino groups of cysteamine and is connected to the surface of the cysteamine self-assembled molecular layer; and the conductive copper paste is sintered at 140-170 DEG C. According to the low-temperature curing conductive copper paste, the problem of anti-oxidation defects of the copper powder can be effectively solved while the conductivity of the copper powder is ensured, and the low-temperature curing conductive copper paste with long-acting anti-oxidation performance and high conductivity is obtained.

The invention belongs to the technical field of microelectronic packaging, and particularly relates to low-temperature curing solder paste for microelectronic packaging and a preparation method of the low-temperature curing solder paste. The low-temperature curing solder paste for microelectronic packaging comprises the following components in percentage by mass: 85-90% of modified solder powder, 1-2% of modified nano-silver particles and 8-14% of soldering flux, the soldering powder comprises, by mass, 42% of Sn and 58% of Bi. The preparation method of the modified solder powder comprises the following steps: uniformly mixing an alcoholic solution containing solder powder, an amino-terminated silane coupling agent and an alcoholic solution of natural macromolecular organic acid, performing ultrasonic treatment, filtering after the ultrasonic treatment is finished, washing with a sodium humate solution, and drying, thereby obtaining the modified solder powder. By adopting the specific modified solder powder and the modified nano-silver particles and cooperating with the soldering flux, the obtained solder paste can be stored at normal temperature and has an excellent expansion rate.

The invention belongs to the field of polyester resins, and provides a weather-resistant polyester resin for low-temperature curing and a preparation method thereof. A three-step progressive design that a polyester prepolymer is terminated by silane and then is subjected to hydrolytic polycondensation with tetraethyl orthosilicate to construct an organic-inorganic covalent hybrid network is adopted; through cooperation of the condensation catalyst, the hindered amine light stabilizer and the ultraviolet absorbent, the mechanical properties that the pencil hardness reaches the HB level or above and the cross-cut test level is not higher than the first level under the low-temperature curing condition of not higher than 100 DEG C are achieved, and the long-term weather resistance that the color difference is not larger than 2.0 and the gloss retention rate is not lower than 80% after 500-hour artificial accelerated aging is achieved. The technical problems of poor storage stability and difficulty in consideration of high solid content and low viscosity caused by insufficient low-temperature curing capacity and non-uniform organic-inorganic hybridization of the traditional polyester resin are solved, and the polyester resin has wide application value in the fields of building coatings, automobile refinishing paints, wood coatings and the like with strict requirements on low-temperature curing and weather resistance.

The invention provides a bio-based low-temperature curing powder coating and a preparation method thereof, and belongs to the technical field of powder coatings, and the bio-based low-temperature curing powder coating specifically comprises the following components in parts by weight: 65-75 parts of bio-based resin, 5-6 parts of triglycidyl isocyanurate, 0.05-0.15 part of tetrabutylammonium bromide, 8-12 parts of air glass beads, 4-6 parts of mica and 0.4-0.6 part of ethylene bis stearamide. 0.7 to 1.3 parts of flatting agent, 0.2 to 0.5 part of benzoin, 0.3 to 0.7 part of amide wax and 6 to 8 parts of pigment. The curing temperature of the bio-based low-temperature curing powder coating is 100-120 DEG C, and the bio-based low-temperature curing powder coating has the advantage of low curing temperature, can be suitable for surface coating of plastic devices, has the advantages of salt mist resistance, impact resistance and the like, and can effectively solve the problems of existing powder coatings.

The invention discloses a manufacturing method of a high-temperature-resistant composite material stator blade and a mold thereof in the technical field of aero-engines. The manufacturing method comprises the following steps: S1, material pretreatment and mold preparation; s2, laying and pre-compaction are carried out; s3, carrying out vacuum mould pressing and curing molding; s4, carrying out edge covering treatment; and S5, detecting and post-processing. According to the method, the specially-made mold is arranged, the upper mold and the lower mold are buckled for pressing, the inclined pressing block provides side face pressing, multi-face pressing is carried out in cooperation with staged vacuumizing, uniform flowing and sufficient curing of resin are achieved, and the size stability and the mechanical property of the blade in the high-temperature environment are guaranteed; besides, in the edge covering treatment, a low-temperature curing high-temperature-resistant adhesive is used for bonding and edge covering, so that edge transition of the blade is smoother, the blade is almost free of deformation after edge covering, and meanwhile, through a series of treatment such as vacuum control, temperature management and quality detection, the manufactured stator blade has excellent internal compactness.

The invention relates to a high-conductivity low-temperature cured carbon nanotube enhanced conductive silver adhesive and a preparation method thereof. The conductive silver adhesive comprises 75%-80% of silver powder, 15%-20% of epoxy resin, 3%-5% of a curing agent, 0.1%-1% of carbon nanotubes, 0.5%-1% of a coupling agent and 1%-3% of a diluent. Through a special preparation process, the conductive silver adhesive has remarkable advantages. In the aspect of conductivity, the high-content silver powder is matched with the carbon nanotubes to form an efficient conductive network, so that high conductivity and low resistance stability are achieved; in the aspect of mechanical properties, the epoxy resin and the coupling agent ensure strong binding power, and the carbon nanotubes enhance the mechanical stability; and in terms of processing property, low-temperature curing can be realized, and good flowability and coating property are achieved. The conductive silver adhesive can effectively solve the problems of conductive connection of high-precision electronic devices, packaging of temperature-sensitive devices, reliability of electronic equipment in a complex environment and the like, and can be widely applied to the fields of integrated circuit chips, micro electro mechanical systems, aerospace and the like.

The invention provides epoxy resin for halogen-free flame-retardant self-leveling powder coating and a preparation method of the epoxy resin, and belongs to the technical field of powder coating. The flame retardant is mainly prepared from anhydrous piperazine, bisphenol A diglycidyl ether, trihydroxymethyl phosphorus oxide, triethyl phosphite, epoxy chloropropane, sodium hydroxide, N-methyl iminodiacetic acid, ethylene glycol diglycidyl ether and other main raw materials through polymerization. The prepared epoxy resin and 2-phenylimidazoline are subjected to low-temperature curing (135 DEG C / 20 min) on the premise that an additional flatting agent does not need to be used, the flexibility of a coating film is good, the impact resistance grade is high, the impact performance reaches the condition that no cracking phenomenon exists in the front and back 60cm, the leveling grade reaches the grade 7 or above, the gloss is high and reaches 95% or above, the oxygen index reaches 34% or above, and the halogen-free flame retardant performance is excellent.

According to the single-component low-temperature curing silver paste stored at normal temperature and the preparation method, polyhedral silver-coated copper powder and nano silver powder are compounded, the contact area between the powder is increased, the resistance is reduced, meanwhile, the characteristic that the nano silver powder can be molten at 180 DEG C is utilized, gaps between the powder are filled, part of colloid is driven away, and the resistivity is further reduced. A closed antimony salt cationic initiator is adopted to cure alicyclic epoxy resin, lower-temperature rapid curing is achieved, oxidation of silver-coated copper powder in the heating curing process is avoided, meanwhile, it is guaranteed that slurry has low viscosity, construction performance is ensured, and in addition, in order to avoid hindering of high metal powder filling on slurry curing, the construction efficiency is improved. The enclosed antimony salt is dissolved by alcohol and is uniformly dispersed in the whole slurry, so that the carrier resin is completely cured, and the problem of grid line pulverization is avoided. The method can be used for printing heterojunction (HJT) photovoltaic cells, laminated cells and flexible circuit boards, and can be industrially produced.

The invention discloses a composite material based on multiple synergistic modification and a gradient nanostructure and a preparation method of the composite material, and relates to the technical field of high-performance composite materials. The problems of weak interface bonding and insufficient load transmission efficiency of the composite material in the prior art are solved, the cohesiveness of the fiber surface and the matrix is greatly enhanced, the problem of high-temperature long-time curing of PAN / CNT grafting is avoided through microwave curing of the nano structure, rapid low-temperature curing is realized, the process period is shortened, and the production cost is reduced. The interface shear strength, the tensile strength and the bending strength of the composite material are obviously improved.

The invention discloses a coating technology of a self-cleaning glass coating, which adopts a water-based paint containing nano TiO2 / SiO2 hybrid sol (core-shell structure), a polyurethane modified silane coupling agent and a flatting agent, and forms a 150-300nm super-hydrophilic coating (the contact angle is less than or equal to 5 degrees) on the surface of glass through a synergistic process of gradient curing (three-stage heating at 80-150 DEG C) and ultraviolet radiation (a main wave band of 365nm and an auxiliary wave band of 280-320nm). The technology breaks through the bottleneck that low-temperature curing and high adhesive force are difficult to be compatible, and the contact angle of the coating is still lt after damp-heat aging; 10 degrees, the light transmittance loss lt; and 3%, the photovoltaic module is suitable for building curtain walls, automobile windshields and photovoltaic modules. The method comprises the following steps: (1) bonding a polyurethane chain segment with a mechanical interlocking enhanced interface through a hydrogen bond; (2) the SiO2 shell layer improves the TiO2 quantum efficiency; and (3) equipment zoned humidity control and inert atmosphere oxidation inhibition are realized, and unification of self-cleaning performance, optical performance and mechanical durability is realized by an environment-friendly process.

The invention relates to the technical field of adhesives, and particularly discloses an adhesive for repairing a glass fiber reinforced plastic pipeline and a preparation process. The invention relates to an adhesive for repairing a glass fiber reinforced plastic pipeline. The adhesive is prepared from the following raw materials: modified bisphenol A epoxy resin, a curing agent, a glass fiber reinforced filler, a silane coupling agent, phenyl glycidyl ether, hydroxyl-terminated nitrile rubber and an antioxidant 1076, the modified bisphenol A type epoxy resin is prepared by grafting and modifying bisphenol A type epoxy resin through amino-terminated polyether; the glass fiber reinforced filler is prepared from hydroxylated glass fibers and a graphene-carbon nanotube compound through covalent grafting. The adhesive can be used for emergency repair of glass fiber reinforced plastic pipelines, has the advantages of high low-temperature curing speed, high bonding strength and good durability, can effectively avoid cracking and leakage of repaired parts, and is adaptive to low-temperature and high-pressure complex repair working conditions. The preparation process is simple and convenient to operate and high in controllability, the adhesive with uniform performance can be stably prepared, and the repair efficiency and repair quality are guaranteed.

The invention relates to the technical field of powder coatings, in particular to a low-temperature curing twice-coating twice-baking powder coating which is prepared from the following components: modified epoxy resin, a polyamide curing agent, polyester resin, composite filler, a flatting agent, an accelerant and a brightener. The low-temperature curing twice-coating twice-baking powder coating provided by the invention has an obvious improvement effect in the aspects of adhesive force, wear resistance and the like, a silane functional group in gamma-glycidyl ether oxypropyl trimethoxy silane in the modified epoxy resin is hydrolyzed to generate a silanol group, and the silanol group can be subjected to a condensation reaction with a hydroxyl group on the surface of a base material to form a covalent bond; and the adhesive force between the coating and the base material is enhanced. And meanwhile, the modified epoxy resin forms a more compact three-dimensional network structure when the coating is cured, so that the hardness and strength of the coating are improved, and the wear resistance is improved.

The invention discloses a modified polyurethane flexibilizer, a high-toughness and high-stripping modified epoxy resin composition and a preparation method thereof. The composition is prepared from the following components in parts by weight: 15 to 30 parts of modified polyurethane flexibilizer, 20 to 45 parts of epoxy resin, 8 to 20 parts of core-shell flexibilizer, 8 to 20 parts of filler, 4 to 10 parts of curing agent and 0.2 to 1.5 parts of coupling agent. Wherein the modified polyurethane toughening agent is prepared from the following raw materials in parts by weight: 60 to 90 parts of reactive polyol compound, 6 to 15 parts of polyisocyanate, 4 to 15 parts of micromolecular acrylate containing reactive hydrogen, 0.2 to 3 parts of chain extender and 0.02 to 0.2 part of catalyst. The prepared single-component epoxy composition has the properties of high toughness, high stripping performance, low-temperature curing, high strength retention rate after high and low temperature circulation and the like, and is suitable for being applied to component assembly in the fields of rail transit, aviation and the like.

The invention provides functional additive slurry, low-temperature curing copper slurry of an N-type TOPCon solar cell, an electrode and a preparation method, and belongs to the technical field of solar cells. The functional additive slurry comprises 50-90 parts by mass of an organic carrier; 0.1-30 parts by mass of a functional additive; the functional additive comprises at least one of magnesium powder, silicon powder, lead powder, graphite, carbon black, tin-bismuth alloy, gallium, iron powder, vitamin C and aluminum powder; 0.1-10 parts by mass of a dispersant; and 5-40 parts by mass of a solvent. When the functional additive slurry is used in the copper slurry, the copper powder can be uniformly dispersed, and the copper powder is not easy to oxidize in the printing and curing process, so that the resistance is reduced.

The invention provides a preparation method of a high-sensitivity wide-temperature-range thermal camouflage anticorrosive coating. The preparation method specifically comprises the following steps: firstly, preparing an internal high-temperature phase change microcapsule, secondly, preparing a multi-core microcapsule, then preparing a surface 3D heat-conducting network of the multi-core microcapsule (MCPCM), finally, adding the multi-core microcapsule of which the surface is constructed with the 3D heat-conducting network into anticorrosive matrix resin, and carrying out ultrasonic dispersion. And carrying out vacuum defoaming and low-temperature curing treatment to obtain the high-sensitivity wide-temperature-range thermal camouflage anticorrosive coating. According to the high-sensitivity wide-temperature-range thermal camouflage anticorrosive coating prepared by the preparation method disclosed by the invention, on the basis of a multi-core microcapsule split charging strategy, extremely-wide-temperature-range coverage is realized, and phase change volume stress is relieved; the high / low temperature phase change material is independently packaged, phase change enthalpy attenuation caused by component intermixing is avoided, surface infrared radiation characteristics are dynamically adjusted through stepped phase change heat absorption / release in a temperature fluctuation environment, the infrared characteristic difference of a target under a complex thermal background is reduced, and the phase change phase change material is particularly suitable for all-weather hidden combat requirements of unmanned reconnaissance equipment.