321 results about "Heat curing" patented technology

Provided is a heat-curable acrylic resin composition which is capable of suppressing the generation of ultra-fine bubbles when cured under heat and pressure, and which has excellent adhesiveness. A thermosetting acrylic resin composition which contains (A) an acrylic copolymer having a carboxyl group and (B) a phenolic resin, and which is characterized in that: when the acrylic copolymer (A) is an acrylic copolymer (A-1) having a glass transition temperature of-35 DEG C or less, the phenolic resin (B) is a phenolic resin; the thermosetting acrylic resin composition contains a specific content of an epoxy curing agent (C-1), contains a specific content of a novolac phenolic resin (B-1) or a self-crosslinking phenolic resin (B-2) as the phenolic resin (B), and contains a specific content of a novolac phenolic resin (B-1) or a self-crosslinking phenolic resin (B-2) when the novolac phenolic resin (B-1) is contained as the phenolic resin (B). The thermosetting acrylic resin composition also contains a specific content of an amine curing agent (C-2).

The invention belongs to the technical field of preparation of soft magnetic composite materials, and particularly relates to an insulation coating method and application of a soft magnetic powder material. The insulating coating method comprises the following steps: (1) uniformly mixing low-melting-point metal or alloy powder with silica sol, a silane coupling agent and a thermocuring resin glue solution to obtain coating slurry; and (2) uniformly mixing soft magnetic powder with the coating slurry obtained in the step (1), firstly performing hot-pressing curing molding at the temperature of 60-100 DEG C under a vacuum condition, and then performing hot-pressing sintering treatment at the temperature higher than the melting point temperature of low-melting-point metal or alloy powder and under an oxygen-containing atmosphere condition to obtain the insulated and coated soft magnetic powder material. According to the insulating coating method, the advantages of an organic material insulating coating method and an inorganic material insulating coating method are combined, the defects of the organic material insulating coating method and the inorganic material insulating coating method are overcome, and the stability and the insulating coating effect of the insulating coating layer are remarkably improved.

The invention belongs to the technical field of supporting films, and particularly relates to an acrylate pressure-sensitive adhesive, a supporting film adhesive tape, a preparation method and application. The acrylate pressure-sensitive adhesive is prepared from the following raw materials in parts by weight: 60 to 90 parts of acrylate soft monomer, 5 to 20 parts of polar functional monomer, 5 to 20 parts of high-Tg hard monomer, 0.1 to 0.5 part of initiator, 0.5 to 3 parts of polyfunctional thermocuring cross-linking agent and a proper amount of solvent. According to the acrylate pressure-sensitive adhesive disclosed by the invention, the acrylate pressure-sensitive adhesive which has the characteristics of low modulus and high cohesion microcosmically is prepared under a solution polymerization and thermocuring process through a specific'soft monomer-hard monomer-crosslinking agent 'formula system design. The pressure-sensitive adhesive macroscopically realizes the performance balance, which is difficult to realize at the same time, among adhesion, buffering and impact resistance.

The invention discloses an aviation composite material paddle and a preparation method thereof, and the preparation method comprises the following steps: curing a carbon fiber prepreg by using a mold pressing process to prepare a carbon beam as a main bearing structure; a carbon beam and a light core material are used as internal supports through a three-dimensional weaving technology, a skin is formed through wrapping and weaving, and an integrated fiber prefabricated body is obtained; preparing a toughened resin system for RTM (resin transfer molding), wherein the toughened resin system comprises liquid resin capable of being thermally cured, a curing agent and a carbon nanotube subjected to surface chemical modification; and placing the fiber preform in a mold, closing the mold, injecting the toughened resin system into a mold cavity, curing, and demolding to obtain the aviation composite material paddle. According to the invention, the preparation of the composite material paddle with high surface precision, light overall weight and excellent impact toughness is realized, and the preparation method is good in process repeatability and suitable for batch production.

A dual-curing adhesive comprises multifunctional epoxy resin, thermal curing agent, photoinitiator, and a compound having an epoxy group and a radically-polymerisable group. The compound may be presen

The invention discloses a high-porosity low-thermal-conductivity cement aerogel plate and a preparation method thereof, and belongs to the technical field of preparation of aerogel materials. The method comprises the following steps: preparing nano water-saturated resin from sodium polyacrylate alkali-resistant water-absorbent resin, mixing the nano water-saturated resin with cement, silica fume and other raw materials, and performing strickling or spray layering molding and microwave heating curing to obtain a finished product. Through the synergistic effect of the nanometer sacrificial template and microwave curing, the porosity of the product is larger than or equal to 96%, the heat conductivity coefficient is smaller than or equal to 0.026 W / (m.K), the compressive strength is larger than or equal to 0.8 MPa, the problems that in the prior art, the porosity is insufficient, the heat conductivity coefficient is high, the period is long, and performance is difficult to consider are solved, the process is simple and controllable, and the method is suitable for large-scale application of building heat preservation.

The invention discloses a high-thermal-stability epoxy amine adduct, a single-component pouring sealant and a preparation process of the high-thermal-stability epoxy amine adduct, the high-thermal-stability epoxy amine adduct is prepared by reacting a single-epoxy compound containing a cyclic structure, aromatic polyamine and a double-epoxy compound containing a flexible chain segment according to a specific molar ratio, and the molecular structure of the high-thermal-stability epoxy amine adduct has rigidity, flexibility and latency; the single-component pouring sealant taking the addition product as a curing agent comprises epoxy resin, the addition product, inorganic filler, a silane coupling agent and the like, the pouring sealant can be stably stored at room temperature, a three-dimensional network structure formed after heating and curing is compact, and the pouring sealant has high glass transition temperature, high thermal decomposition temperature and excellent long-term thermal aging performance; and the epoxy resin is especially suitable for potting protection of electronic components with extremely high requirements on heat resistance and reliability.

The invention discloses a mechanical tough light-heat dual-curing bio-based coating and a use method thereof. The coating comprises a cellulose macromonomer grafted with double bonds, a castor oil-based monomer containing steric hindrance urea bonds, a diluent, a photoinitiator and diisocyanate. The application method comprises the following steps: mixing the materials, coating the surface of a base material with the mixed materials, curing under ultraviolet light, and then carrying out thermocuring. The castor oil is subjected to chemical modification to introduce steric hindrance urea bonds and chain-end double bonds, and the castor oil, the cellulose macromonomer grafted with the double bonds, the diluent, the photoinitiator and the diisocyanate are subjected to photo-thermal dual curing to form a coating on the surface of a base material, so that the mechanical strength of the coating is remarkably improved.

The invention belongs to the technical field of pressure-sensitive adhesives, and discloses a light / heat dual-curing acrylate pressure-sensitive adhesive and a preparation method thereof. The light / heat dual-curing acrylate pressure-sensitive adhesive is prepared from the following components in parts by weight: 10.8 to 20.8 parts of a hard monomer, 76 to 85 parts of a soft monomer and a diluent, 2.2 to 4.2 parts of a functional monomer, 1 to 2.1 parts of a photoinitiator, and 1.1 to 1.5 parts of a modified isophorone diisocyanate cross-linking agent and a trifunctional group cross-linking agent. The method comprises the following steps: carrying out photopolymerization on a hard monomer, a soft monomer, a diluent, a functional monomer and a part of photoinitiator to obtain a prepolymer; uniformly mixing the prepolymer, the modified isophorone diisocyanate cross-linking agent, the three-functional-group cross-linking agent and the remaining photoinitiator, coating, carrying out light curing, and carrying out heat curing, so as to obtain the pressure-sensitive adhesive. The pressure-sensitive adhesive provided by the invention has excellent comprehensive performance, and effectively solves the problems of easy migration, low curing rate, and poor aging resistance and temperature resistance of a traditional pressure-sensitive adhesive cross-linking agent.

Compositions for reinforcing substrates, reinforced panels manufactured from those compositions, and methods of manufacture are disclosed. A composition may be composed of a base resin binder, a reinforcing fiber, a toughener, a heat curing agent, a cure accelerating agent, a sagging resistance agent, and a reinforcing agent. A coating of this composition can be applied upon a substrate, such as a steel or aluminum substrate. By heating the coating such that the coating cures upon the substrate, a reinforced substrate may be produced. The substrate may be sized and configured as a panel so that it could be used as an automotive panel. The low density and strong characteristics of the cured coating may allow for thin, lightweight automotive panels to be produced which provide higher milage. Such panels may also be effective at reducing vibration-generated noise that may otherwise result from a thin automotive panel.

The invention provides a composite conductive film preparation method and a composite conductive film, a PDMS matrix, a multi-walled carbon nanotube, a conductive filler, an anionic dispersant and isopropanol are mixed according to a preset mass ratio to obtain a slurry with a steric hindrance structure; and processing the uniformly mixed slurry by using a mold and a thermocuring process to obtain the composite conductive film with high dispersity, biosafety and machinability.

The invention relates to the field of knitted fabric forming, in particular to a low-temperature formed knitted fabric forming process which comprises a scattering and tiling machine, a needling machine and a thermosetting device, the thermosetting device comprises two gluing vessels, two adjacent thermosetting working procedures and an extrusion roller set, and a plurality of heating rollers are arranged in each thermosetting working procedure; according to the device, the two thermosetting procedures are arranged, step-by-step gum dipping and secondary heating and curing are achieved through the cooperation of the two gluing dishes, when passing through the gluing dishes for the first time, the two gluing dishes and the two thermosetting procedures pass through the extrusion roller set in a staggered mode, and the knitted fabric wound on the knitted fabric roller penetrates through the gluing dishes, the thermosetting procedures and the extrusion roller set in a staggered mode. After the surface of the knitted fabric is soaked with thermocuring epoxy resin, the knitted fabric enters a first-stage thermocuring process and is pre-cured under the action of a heating roller, the initial rigidity is enhanced, then the knitted fabric enters a second gluing vessel again for glue repairing, the area with insufficient primary permeation is filled, the filling rate of the resin among fibers is increased, and the initial rigidity is improved. And then complete curing is carried out in a second thermosetting process.

The application belongs to the technical field of soft magnetic composite material preparation, and particularly relates to an insulation coating method for soft magnetic powder material and application. The insulation coating method comprises the following steps: (1) uniformly mixing low-melting-point metal or alloy powder, silica sol, silane coupling agent and hot curing resin glue solution to obtain coating slurry; (2) uniformly mixing soft magnetic powder and the coating slurry of step (1), and then performing hot-pressing curing forming at a temperature of 60-100 DEG C and under vacuum condition, and then performing hot-pressing sintering treatment under a temperature higher than the melting point of the low-melting-point metal or alloy powder and under an oxygen-containing atmosphere condition to obtain the insulation-coated soft magnetic powder material. The insulation coating method of the application combines the advantages of the organic material insulation coating method and the inorganic material insulation coating method, overcomes the respective defects, and significantly improves the stability and insulation coating effect of the insulation coating layer.

Compositions for reinforcing substrates, reinforced panels manufactured from those compositions, and methods of manufacture are disclosed. A composition may be composed of a base resin binder, a reinforcing fiber, a toughener, a heat curing agent, a cure accelerating agent, a sagging resistance agent, and a reinforcing agent. A coating of this composition can be applied upon a substrate, such as a steel or aluminum substrate. By heating the coating such that the coating cures upon the substrate, a reinforced substrate may be produced. The substrate may be sized and configured as a panel so that it could be used as an automotive panel. The low density and strong characteristics of the cured coating may allow for thin, lightweight automotive panels to be produced which provide higher milage. Such panels may also be effective at reducing vibration-generated noise that may otherwise result from a thin automotive panel.

The utility model discloses a device and a system for manufacturing a self-adhesive coating motor iron core. The system comprises a feeding unit, a pressing unit, a moving unit, a heating unit, a cooling unit and a discharging unit. And in the moving unit, the pressing mechanism is used for pushing and lowering the laminated iron core, so that the laminated iron core moves from the feeding port of the feeding pipeline to the discharging port of the feeding pipeline, the heating module and the cooling module are arranged outside the feeding pipeline, and meanwhile, the heating module is located above the cooling module, so that the laminated iron core can be cooled, and the laminated iron core can be cooled. And the laminated iron core is produced through vertical continuous thermocuring, so that the operation time is shortened.

The invention provides a bio-based dual-dynamic network polymer as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, mixing an epoxy monomer, binary acid, graphene and a transesterification catalyst, and heating for polymerization reaction to obtain a prepolymer; wherein the epoxy monomer comprises polyethylene glycol diglycidyl ether and glycerol triglycidyl ether, and the binary acid comprises sebacic acid, 2, 5-furandicarboxylic acid and 2, 2 '-dithiodibenzoic acid; and S2, removing bubbles from the obtained prepolymer, and then carrying out thermocuring to obtain the bio-based dual-dynamic network polymer. The bio-based dual-dynamic network polymer obtained by the invention has good mechanical properties, hydrophobicity, solvent resistance, alkali recoverability, self-healing and shape memory properties, and has certain application potential in the fields of intelligent actuators and flexible sensors.

The application discloses a propargyl polysiloxane modified cyanate ester resin and a preparation method and application thereof, and comprises the following steps: S1, a propargyl compound shown in formula I and polysiloxane shown in formula II are subjected to a heating reaction in the presence of a platinum catalyst and a solvent to obtain a propargyl polysiloxane; S2, the propargyl polysiloxane is mixed with a cyanate ester monomer, heated and stirred until a transparent solution is obtained, and subjected to a heat curing treatment to obtain the propargyl polysiloxane modified cyanate ester resin. The propargyl polysiloxane modified cyanate ester resin can be cured and formed at a lower curing temperature, and the prepared modified resin has lower dielectric loss, water absorption, higher impact strength and thermal stability, and has a good application prospect in high-end electronic materials.

The invention relates to a composite material and a preparation method thereof, in particular to a carbon fiber-hydrogel-MOF composite material, and belongs to the technical field of carbon fiber materials. The preparation method of the composite material comprises the following steps: pickling the carbon fiber material; the preparation method comprises the following steps: dissolving a propylene compound in a solvent, adding alkali to adjust the pH value to 7-9, and then adding an initiator and a cross-linking agent to obtain a hydrogel precursor solution; and adding the hydrogel precursor solution into a mold, then adding a metal organic framework material, putting acid-washed carbon fibers into the mold, immersing, heating and curing to obtain the composite material. According to the invention, unidirectional carbon fibers are used as a conductive skeleton; the hydrogel is used as a'water storage tank '; the loaded MOF is used as a negative ion catalytic processing plant to activate adsorbed water in the environment so as to generate hydroxyl radicals, and compared with a traditional negative ion electrode, the cost is reduced, the process is simplified, and the sterilization efficiency is improved.

[Problem] To provide a method for forming a multilayer coating film with which a coating film capable of improving adhesion between a coating film surface and an exterior member or the like and showing excellent gasoline resistance, water resistance, and appearance can be obtained. [Solution] A method for forming a multilayer coating film by sequentially applying an intermediate coating composition, a base coating composition, and a clear coating composition on a metal or resin material for a motor vehicle body and then heat-curing the compositions, wherein the clear coating composition is obtained by mixing a main agent (A) and a curing agent (B), the main agent (A) contains a hydroxyl group-containing resin (A-1) and a surface modifier (A-2) in an amount of 0.01 to 3.0 mass% relative to the mass of the solid content of the hydroxyl group-containing acrylic resin, the hydroxyl group-containing acrylic resin (A-1) has a hydroxyl value of 80 to 250 mg KOH / g, a mass average molecular weight of 1,000 to 30,000, and an SP value of 9.0 to 12.0, and the surface modifier (A-2) is a polymer having a mass average molecular weight of 3,000 to 100,000 obtained by grafting an acrylic resin (A-2-i) and a resin (A-2-ii), the acrylic resin (A-2-i) has an SP value of 8.5 to 10.0, and the resin (A-2-ii) has an SP value at least 2.0 higher than the SP value of the acrylic resin (A-2-i).

The invention belongs to the technical field of wear-resistant coatings, and particularly relates to a nano-based wear-resistant coating material. The invention aims to solve the problem that the existing wear-resistant coating material is poor in performance stability under severe working conditions. The nano-based wear-resistant coating material provided by the invention comprises a hybrid adhesion bottom layer, a gradient transition layer and a hybrid reinforced top layer, the hybrid adhesion bottom layer is obtained by curing bottom layer slurry; the hybrid enhanced top layer is obtained by curing top layer slurry; and the gradient transition layer is obtained by curing the bottom layer slurry and the top layer slurry together. The bottom layer slurry is prepared from epoxy resin, ethyl orthosilicate and gamma-(2, 3-epoxypropoxy) propyl trimethoxy silane; the top layer slurry comprises polyamide resin, hybrid filler and oil-loaded microcapsules. The hybrid adhesion bottom layer, the gradient transition layer and the hybrid enhanced top layer are subjected to UV illumination treatment and thermocuring, and then the nano-based wear-resistant coating material product is obtained. The prepared coating product can still keep good wear resistance and low friction coefficient under severe working conditions.

The invention discloses a new energy motor self-adhesive material iron core scattered sheet curing automatic line. Comprising a double-layer circulation conveying line, a circulation tool, a tool backflow mechanism, a feeding station, a visual inspection station, a pressurizing, shaping and height measuring station, a sheet adding and reducing station, an electromagnetic induction heating, curing and cooling station, a tool cooling station, a storage station, a code printing and reading station, a height detection station, a cleaning air shower station, an offline storage station and the like. Automatic heating curing and cooling of self-adhesive iron core scattered sheets can be achieved, stacking and quality control of the iron core scattered sheets are conducted on line, cured iron core products are subjected to online code printing, code scanning, detection and air shower cleaning, the whole technological process is recorded on line, the production quality of the products is tracked in real time, the product percent of pass is increased, the production efficiency is improved, and accurate tracing of the products is achieved. The working procedures of manual carrying and tool locking are eliminated, the labor intensity of workers is reduced, and the problems of poor product quality and the like caused by product curing pressure difference generated by manual locking are solved.

The invention discloses a pressure-sensitive adhesive for thermosetting coating rolling and light curing bonding and a preparation method of the pressure-sensitive adhesive. The pressure-sensitive adhesive is prepared from the following raw materials: a polyurethane acrylate prepolymer, a dynamic disulfide bond cross-linking agent, an NCO-containing closed curing agent, a trifunctional acrylate monomer, a bifunctional diluting monomer and an acylphosphine oxide photoinitiator. Wherein the polyurethane acrylate prepolymer, the dynamic disulfide bond cross-linking agent and the closed curing agent form a thermocuring component; the three-functionality acrylate monomer, the double-functionality diluting monomer and the acylphosphine oxide photoinitiator form a photocuring component. The adhesive provided by the invention is widely applied to coiled material processing and terminal products, and effectively solves the dual requirements of insufficient initial adhesion and high peel strength.

The application discloses a kind of transparent anti-fog composite coating and its preparation method and application, belong to coating material technical field.The application is prepared with deionized water as solvent, respectively, and the mixture of two is obtained SiO2 / PAA anti-fog transparent composite coating with silica nanoparticle dispersion liquid and polyacrylic acid solution;Subsequently, substrate is cleaned, dried and is treated by plasma surface activation, and coating is added to the surface of pretreated substrate after using blade coating film, finally, transparent anti-fog composite coating is obtained in hot curing in air drying oven.The transparent anti-fog composite coating prepared by the application has good anti-fog performance, the average transmittance of visible light (380~750 nm) reaches 92%, has good durability and self-repairing function.The coating and its coated product can be applied in medical devices, optical devices, building and automotive glass and other fields.

This invention discloses a method for preparing a PUA resin material for 3D printing with photothermal dual-curing properties. Step 1: Weigh IPDI and PTMG and react them in a water bath to obtain a PUA prepolymer. Step 2: Weigh TBEMA and add it to the PUA prepolymer to react and obtain a photocurable polyurethane acrylate. Step 3: Mix the photocurable polyurethane acrylate with an amine-terminated silicone chain extender, and then add an active diluent and a photoinitiator to prepare a polyurethane resin mixture. Step 4: Pour the polyurethane resin mixture into a photocurable 3D printer for photocuring and then place it in an oven for thermal curing to obtain the PUA resin material for 3D printing with photothermal dual-curing properties. The tensile strength of this material reaches 1.36 MPa, which is 6.39 times higher than that of PUA without chain extender, and it is non-toxic to human gingival fibroblasts, showing broad application prospects in the field of high-performance biomedical resin 3D printing.

The application discloses an interface-locked anti-swelling hydrogel coating mesh membrane and a preparation method and application thereof, and comprises the following steps: growing a tin dioxide particle layer on the surface of a stainless steel filter mesh in situ, depositing a polydopamine coating on the tin dioxide particle layer, coating an anti-swelling hydrogel coating on the polydopamine coating, and preparing the interface-locked anti-swelling hydrogel coating oil-water separation mesh membrane through heat curing and freeze-thaw cycles; the polydopamine in the mesh membrane has adhesion, and cooperates with sulfuric acid and [2-(methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl) ammonium hydroxide to induce the Hofmeister effect, so that polyvinyl alcohol molecular chains are dehydrated and crystallized, a high-physical-crosslinking anti-swelling hydrogel coating is formed, strong interface bonding is provided, the micro-nano rough structure constructed by the tin dioxide particles and the introduced hydrophilic substances are combined, the problems of easy excessive swelling and interface delamination of the hydrogel coating oil-water separation mesh membrane are overcome, and long-acting and high-performance oil-in-water emulsion separation can be realized.

The invention provides a sodium metal battery negative electrode substrate and a preparation method and application thereof. The preparation method comprises the following steps: providing mixed slurry, wherein the mixed slurry comprises a phosphorus-containing polymer precursor, a cross-linking agent, a conductive filler and a photoinitiator; the phosphorus-containing polymer precursor contains a nucleophilic functional group; and coating a negative electrode current collector with the mixed slurry, and then sequentially carrying out photopolymerization curing and thermocuring to form a polymer coating, so as to obtain the sodium metal battery negative electrode substrate. According to the invention, a polymer coating with a hard shell-soft core gradient structure is constructed on a current collector through a phosphorus-containing polymer precursor and a light-heat dual-curing process, and a nucleophilic functional group induces uniform nucleation of sodium through a strong coordination effect so as to inhibit dendritic crystals; a phosphorus group can effectively quench free radicals, so that the flame retardance and the interface stability are improved; the surface layer of the gradient structure is compact to inhibit dendritic crystal puncture, the bottom layer is porous to buffer volume change, and uniform deposition, interface stability and volume buffering are synchronously achieved.

Provided is an adhesive particle that can suppress the occurrence of dripping during heating, can improve adhesion, and can suppress the occurrence of light leakage. The adhesive particle of the present invention includes a base particle and a coating portion disposed on the surface of the base particle, the base particle being a black particle, and the coating portion including a thermosetting resin.

The application provides a fluorescent structural color anti-counterfeiting material and a preparation method thereof, and the preparation method comprises the following steps: preparing composite fluorescent particles of mesoporous silica microsphere loaded halogen perovskite fluorescent particles CsPbX3, wherein X is Br, Cl or I; mixing the composite fluorescent particles with monodisperse silica nanoparticles, resin, a solvent, an initiator and an additive to obtain a mixture, wherein the volume percentage of each component in the mixture is as follows: 25-65% of the nanoparticles, 35-75% of the resin, 0.01-10% of the initiator, and 5-90% of the solvent, and the mass of the composite fluorescent particles is 0.01-3% of the mass of the silica nanoparticles; performing rotary evaporation on the mixture under vacuum to obtain concentrated paint, and after photocuring or thermal curing, the anti-counterfeiting material is obtained. The anti-counterfeiting material of the technical scheme has the dual anti-counterfeiting effects of structural color anti-counterfeiting under natural light and fluorescent anti-counterfeiting under ultraviolet excitation.

The application discloses a kind of artificial sweat-resistant weather-resistant cathode electrophoretic paint and preparation method thereof.The artificial sweat-resistant weather-resistant cathode electrophoretic paint includes the following components by weight: modified acrylic resin 40-50 parts, curing agent 25~30 parts, artificial sweat-resistant auxiliary agent 5~7 parts, weather-resistant auxiliary agent 3~4 parts, acid 2~3 parts, deionized water 2~4 parts.The working solution prepared by the composition of the application is cathodically electrophoretically coated, and the coating film after heat curing has both artificial sweat-resistant performance and weather-resistant performance, with artificial sweat-resistant performance of 96 hours, achieving high-end glasses frame and other materials requiring high weather resistance, artificial sweat resistance and other properties.