219 results about "Melamine resin" patented technology

The application discloses melamine resin / nano-silica composite microspheres, a preparation method thereof, and a light diffuser and optical material, and relates to the technical field of organic-inorganic composite materials. The method uses branched nano-silica and large-particle-size spherical nano-silica as a balling aid, and utilizes melamine and formaldehyde to polymerize in an aqueous phase to prepare the composite microspheres, without using a dispersant or an alcohol organic solvent. The obtained microspheres have a rough surface morphology similar to a litchi shell, and exhibit excellent high-haze and high-transmittance performance when used as the light diffuser. The preparation method is simple, low in cost, suitable for industrial production, and can be widely used in the fields of LED lighting and liquid crystal display.

The invention relates to the technical field of powder conveying, in particular to melamine resin powder quantitative conveying and excess material automatic recycling integrated equipment which comprises a support and a discharging tank. The transmission assembly comprises a discharging barrel, a material moving column and a pushing head; the stroke adjusting assembly comprises a first adjusting rod; the excess material recycling assembly comprises a rack and a sliding rod, quantitative discharging and excess material recycling are integrated, the operation steps are optimized, meanwhile, the efficiency is improved, meanwhile, charging, discharging and excess material recycling are automatically achieved in the rotating process of the material moving column, the circulating integrated production process is achieved, and the production efficiency is improved. When the excess material recycling assembly vibrates, excess materials on the lower portion are shaken off and collected, meanwhile, falling distributed materials on the upper portion are vibrated, gaps are eliminated, accurate discharging is guaranteed, when the discharging amount is set, balance weights are adjusted in a self-adaptive mode, finally, the amplitude and the vibration effect are improved in a self-adaptive mode, integrated adjustment of the discharging amount range and the amplitude is achieved, and the discharging efficiency is improved. The occupied space is saved; and meanwhile, the production efficiency is improved.

The invention belongs to the technical field of flame retardants, and particularly relates to a melamine hydrobromide flame retardant and a preparation method thereof. The flame retardant disclosed by the invention has a core-shell structure, the core is hydroxylated melamine hydrobromide subjected to surface modification by a silane coupling agent, and the shell is melamine resin synergistically enhanced by ammonium polyphosphate and oxidized cellulose nanofibrils; through silanization treatment, core-shell interface combination is enhanced, and space-time synergy of gas phase and condensed phase flame retardance is achieved through a composite shell; the obtained flame retardant is high in thermal stability in a polymer matrix, the limit oxygen index of a composite material can be remarkably increased after the flame retardant is added, and the flame retardant has a wide application prospect in the field of flame retardance of high polymer materials through a UL-94 V-0 grade test.

The application discloses a kind of high heat-conducting high endurance low-temperature phase change microcapsule preparation methods, comprising: step 1: using C7, C9 alkane preparation cryogenic phase change material emulsion;Step 2: using melamine resin prepolymer containing polyethylene glycol and hydrophobic silicon carbide powder containing nano silicon carbide preparation modified wall material prepolymer;Step 3: using cryogenic phase change material emulsion and modified wall material prepolymer preparation phase change microcapsule;Step 4: using silver mirror reaction to phase change microcapsule surface silver plating, obtain surface silver plating microcapsule.The low-temperature phase change microcapsule prepared, using C7, C9 low-temperature mixed alkane as microcapsule core material;Using melamine resin as microcapsule wall material, and wall material contains polyethylene glycol modified material, nano silicon carbide modified material to improve the toughness of microcapsule, thermal conductivity;Microcapsule surface silver plating to resist volatility, eliminate residual formaldehyde in wall material.The application solves the problem of low thermal conductivity and poor durability of cryogenic phase change material microcapsule.

The invention relates to the technical field of melamine resin high polymer materials, in particular to a high-heat-resistance melamine resin composite material which comprises a first component and a second component. The first component comprises a modified melamine resin prepolymer, a crosslinking accelerator, a curing agent and a first dispersing agent; the modified melamine resin prepolymer is prepared by modifying a melamine resin prepolymer through lignosulfonate and modified nano cellulose whiskers; the modified nano cellulose whiskers are prepared by modifying nano cellulose whiskers through a silane coupling agent; the second component comprises a composite reinforcing material; the composite reinforcing material comprises a carboxylated carbon nanotube, a montmorillonite-graphene hybrid, a second dispersing agent and a nucleating agent; the carboxylated carbon nano tube is prepared by reacting a carbon nano tube with strong acid; the montmorillonite-graphene hybrid is prepared from montmorillonite and graphene oxide through a reaction. Melamine resin is modified by adopting lignosulfonate and modified nanocellulose whiskers, meanwhile, a reinforcing material is compounded, and the heat resistance and the mechanical property of the melamine resin are improved in combination with a gradient curing process.

The disclosed panels generally comprise a protective layer composed of a paper impregnated with a melamine resin. The protective layer may be incorporated into a panel comprising a rigid composite core, such as a plastic composite core or a mineral composite core. Disclosed are also methods for manufacturing the panels.

The invention discloses a sound chamber module system which is provided with walls on four sides and comprises a door to create an internal space, a main body frame arranged on one side of the wall, a video device arranged in the center of the main body frame and a plurality of audio devices arranged on two sides of the periphery of the video device, and the wall comprises a concrete layer. The sound absorption material layer is installed on the concrete layer, and the sponge component is doped with ferrite components. The sound absorption material layer comprises a semi-non-combustible sheet layer in which water and melamine resin powder are dissolved.

The invention provides a melamine resin powder toughening granulation method and granulation equipment thereof, and relates to the technical field of thermosetting resin.The melamine resin powder toughening granulation method comprises the following preparation processes that firstly, thermoplastic resin powder is added into a solvent to prepare a thermoplastic resin solution; 2, wrapping inorganic rigid particles with a thermoplastic resin solution to obtain a mixture; 3, the mixture is subjected to spray drying and ground into superfine powder, and then the superfine powder is mixed with melamine powder to obtain composite particles; step 4, adding carboxymethyl cellulose and zinc stearate into the composite particle material, and carrying out double-roller pressing by virtue of a pelletizer, so as to obtain a flaky material; step 5, crushing and granulating the flaky material to obtain granules; sixthly, screening the particles through a screen to obtain finished particles; and 7, re-granulating the unqualified material until qualified uniform melamine resin particles are obtained. Through the technical improvement of the three steps of wrapping, spray drying and grinding, on the basis that the toughness and the flowability of the obtained granules are improved, the uniformity of products formed by compression molding is good.

sound insulation insert (10), which is designed in particular for the interior noise reduction of a residential ventilation system that can be installed in a wall opening and has at least one axial fan having a central motor hub, wherein the sound-insulating insert (10) is made essentially of an acoustically absorbing material at least on its surfaces in contact with the airflow, and wherein the sound-insulating insert (10) has an annular outer element (12) for insertion into a wall penetration duct, wherein the sound-insulating insert (10) has an inner element (14) in an area which, in the mounted position, adjoins the motor hub of the at least one axial fan in the residential ventilation system, which is connected to the outer element (12) via at least one web (16a-c), so that an annular gap-shaped passage for the airflow is formed between the outer and inner elements, which passes through the at least one The bridge (16a-c) is divided into sections (18a-c), characterized by the fact that the outer element (12), which includes at least one web (16a-c) and the inner element (14) are made of an acoustically absorbing rigid or soft foam material, in particular a melamine resin foam.

This invention discloses a two-step method for preparing nitrogen-doped three-dimensional network phenolic resin-based composite carbon materials and their applications. The method uses an alkaline environment provided by ammonia to induce addition condensation polymerization of phenol and formaldehyde to obtain a preliminary nitrogen-doped phenolic resin. This resin is then mixed with melamine resin to achieve a second step of nitrogen introduction, and after being composited with sodium alginate, it is cross-linked with CaCl2 to obtain a three-dimensional hydrogel precursor. After carbonization and activation treatment, a nitrogen-doped porous carbon material is obtained. This material possesses both micro- and mesoporous synergy and multiple types of nitrogen functional sites, exhibiting high specific surface area capacitance and excellent cycling stability in supercapacitors. Compared with existing schemes that only use NaOH without introducing dual-source nitrogen doping (such as CN119724955A), this invention achieves synergistic optimization of structure, chemical sites, and transport through ammonia pre-doping, secondary nitrogen doping with melamine resin, and a ternary interpenetrating network. The process is simple, uses inexpensive raw materials, and is suitable for large-scale production.

The invention discloses a melamine ware made of a melamine composite material and a manufacturing method of the melamine ware. The melamine ware is a ware forming body which is made of the composite material formed by mixing a melamine powder granular raw material, melamine secondary material fragments and melamine resin bright powder through one-time hot press forming operation. The melamine vessel comprises a combined body and a plurality of melamine secondary material fragments, wherein the melamine secondary material fragments are irregular fragments with different sizes or various colors formed by utilizing a melamine secondary material subjected to hot press molding and performing crushing treatment; wherein in the hot press molding operation, the melamine powder granular raw material and the melamine resin bright powder can be hot-pressed and melted into a combined body, and the combined body is tightly adhered and coated on the outer surface of each melamine secondary material fragment; therefore, the defects that the surface of the vessel is rough and unsmooth and the vessel is easy to peel and fall off when being collided due to the fact that the melamine secondary material fragments are easy to protrude out of the surface of the vessel are overcome.

The invention relates to the technical field of coatings, in particular to a thin coating type low-gloss metal floor drain protective coating with good acid and alkali resistance and a preparation method of the thin coating type low-gloss metal floor drain protective coating. Functional matting resin, high-acid-value acrylic resin, melamine resin and epoxy resin are innovatively compounded to construct an extremely compact multiple cross-linked network, a special adhesion promoter and an anti-corrosion additive are supplemented to enhance interface protection, and a solvent and a process are optimized, so that the corrosion resistance of the coating is improved, and the corrosion resistance of the coating is improved. According to the invention, all the components play a supernormal synergistic effect in a coating with the thickness of 8-10 microns, so that organic unification of three key performances of thin coating, low gloss and high acid and alkali corrosion resistance is finally realized, and the technical problems that a metal floor drain is easy to corrode and poor in appearance under the thin coating condition are effectively solved.

The application provides a microcapsule and kaolin composite reinforced self-lubricating fabric gasket material and application thereof, and relates to the technical field of lubricating materials.The application provides a tung oil-methyl etherified melamine resin microcapsule, which comprises tung oil and methyl etherified melamine resin wrapped on the surface of the tung oil, and the methyl etherified melamine resin is formed by cross-linking polymerization of methyl etherified hexamethylol melamine.The tung oil is wrapped by the methyl etherified melamine resin, so that the excellent lubricating performance of the tung oil is retained, the dispersion problem of the tung oil in the resin is solved, and the oxidation reaction of the tung oil is inhibited.The tung oil-methyl etherified melamine resin microcapsule and amino kaolin are simultaneously introduced into the self-lubricating fabric gasket material, and the synergistic reinforcing effect of the tung oil-methyl etherified melamine resin microcapsule and the amino kaolin is exerted, so that the wear resistance and the lubricating performance of the self-lubricating fabric gasket material are effectively improved.

This invention discloses a high-barrier polyvinyl alcohol coated film and its preparation method. The coated film structure sequentially includes: a film substrate, a primer layer, and a high-barrier coating layer. The high-barrier coating layer is prepared and coated from the following raw materials in the indicated mass percentages: 4-10% water-resistant modified polyvinyl alcohol, 2-6% acidic aluminum sol, 0.2-0.5% melamine resin prepolymer, 0.5-1% stabilizer, 0.05-0.5% leveling agent, 0.05-0.1% defoamer, and 83-93% deionized water. This invention provides the market with a packaging film material suitable for boiling, possessing high oxygen barrier properties and transparency.

The utility model discloses a kind of moisture-proof composite corrugated paperboard, it is related to corrugated paperboard field, specifically a kind of moisture-proof composite corrugated paperboard, including bottom layer moisture-proof layer, inner layer corrugated core layer, intermediate barrier layer, outer layer corrugated core layer and surface layer moisture-proof layer from inside to outside are sequentially arranged;The bottom layer moisture-proof layer is PET film kraft paper, the surface layer moisture-proof layer is PE film kraft paper, the intermediate barrier layer is aluminum foil composite paper, the inner layer corrugated core layer is melamine resin modified corrugated paper, the utility model solves the current corrugated paperboard surface using coating single waterproof coating or using single layer plastic film film coating, the moisture-proof effect of this single coating processing mode is limited, and easily failure due to abrasion;Although single layer film can block part liquid water, it is difficult to solve water vapor penetration problem, and interlayer is mostly starch adhesive, swelling peeling after meeting water, cannot satisfy the long-term use demand of high humidity environment problem.

The present invention relates to a method for producing a melamine resin foam, comprising foaming an aqueous mixture M, said mixture M comprising at least one melamine-formaldehyde precondensate, an aqueous hydrogen peroxide solution, and at least one surfactant.

The application discloses a high-hardness cover bottom dian ink, which is used for coating on a substrate and curing, and raw materials of the high-hardness cover bottom dian ink include liquid polyester resin, solid polyester resin, bisphenol A type epoxy resin, etherified melamine resin, diluent, defoaming agent, leveling agent, filler, blocked aliphatic isocyanate, matting powder, coupling agent and organic tin catalyst; and a curing process of the ink comprises the following steps: coating the ink on the substrate, heating at a speed of 5-10 DEG C / min to 130-140 DEG C, and keeping the temperature for 10-12 min; heating at a speed of 5-10 DEG C / min to 175-185 DEG C and keeping the temperature for 10-12 min, and completing the curing. After the ink is cured, an island structure is formed, the etherified melamine resin and hydroxyl group are rapidly crosslinked to form a continuous three-dimensional rigid network, and the uniformly distributed polyurethane dispersed phase in the three-dimensional rigid network can prevent cracks from expanding in the rigid network, so that the burst edge phenomenon in the mesh test is avoided.

The invention discloses a tungsten nitride / carbon composite material as well as a preparation method and application thereof. The preparation method adopts a molten salt synthesis method and takes tungsten trioxide as a tungsten source, thiourea as a nitrogen source and a sulfur source, melamine resin as a carbon source and sodium chloride as a molten salt template. Under the room temperature condition, powder obtained through ball milling is subjected to high-temperature roasting through a tubular furnace to prepare the tungsten nitride and carbon composite material, and the pore channel structure and the heteroatom content of the material can be adjusted by controlling the proportion of precursors. The product yield of the method reaches 16%, and the material can be used as the water electrolysis hydrogen production catalyst, and is a very ideal method for preparing the water electrolysis hydrogen production catalyst.

To provide a coating agent, a cured product and a laminate, in which the cured product exhibits good appearance.SOLUTION: A coating agent comprising methylated melamine resins, C4 to 8 aliphatic polyols and water.SELECTED DRAWING: None

The invention belongs to the field of mineral processing, and discloses application of an organic inhibitor applicable under neutral to alkaline conditions in a spodumene ore flotation process, and the organic inhibitor comprises at least one of a polycarboxylic acid high-performance water reducing agent, a sulfamate high-efficiency water reducing agent, a melamine resin high-efficiency water reducing agent and a ketoaldehyde condensate high-efficiency water reducing agent. The invention further discloses a flotation process of spodumene ore. The invention finds and verifies that at least one of PCE, ASF, SMF and SAF can be used as an efficient spodumene flotation organic inhibitor for the first time and belongs to a macromolecular organic inhibitor, and the macromolecular organic inhibitor has differentiated competitive adsorption capacity on the surfaces of spodumene and gangue minerals (feldspar and quartz); the method has the double advantages of enhanced separation in a high-alkali system and efficient flotation in a neutral system. A brand-new and non-traditional inhibitor selection is provided for separation of spodumene and gangue minerals, and the technical limitation of dependence on traditional inhibitors such as sodium carbonate for a long time is broken through.

The application discloses a kind of melamine impregnated paper decorative panel hot-pressing process for glass magnesium composite board, belongs to decorative panel technical field, including the following steps: decorative paper is dipped into melamine resin adhesive and impregnated, then dried and used, the surface of glass magnesium plate is polished and pretreated, then melamine impregnated paper is laid on the surface of glass magnesium plate after polishing pretreatment, blank plate is obtained, temperature is set to 60±5 ℃, pressure is 9-10MPa, hot-pressing is carried out, hot-pressing time is 20-25 seconds, preheating is carried out, then heated to 110-120 ℃, continue hot-pressing for 2-3min, naturally cooled to 60 ℃±10 ℃, finished product is obtained. By controlling hot-pressing condition and using melamine resin adhesive, the adhesion between materials in hot-pressing process is improved, and the adhesion effect is improved, the covering curl of decorative paper is reduced, and the curing efficiency is improved.

[Problem] To provide a coating agent, a cured product, and a laminate. [Technical means] A coating agent comprising a methylated melamine resin, a C4-8 aliphatic polyol, and water.

A melamine utensil made from melamine composite material and a method of manufacturing the same are provided. Stir and mix 60-70 weight percentage (wt %) of a primary powder-like melamine material, 20-30 wt % of shards of a secondary melamine material, and 5-15 wt % of melamine resin glazing powder, or 49-59 wt % of the primary powder-like melamine material, 16-26 wt % of shards of the secondary melamine material, 12-22 wt % of pulp, and 6-10 wt % of the melamine resin glazing powder evenly to form a composite material. The composite material is pre-heated and mounted into a mold to produce the melamine utensil by hot pressing. The shards of the secondary melamine material with different shapes, sizes or colors are formed by crushing of the hot-pressed secondary melamine material. During the hot-pressing, the primary melamine material and the melamine resin glazing powder are melted and attached to the secondary melamine material.

The present disclosure provides a water-based paint composition which is a single-component, has excellent storage stability, and forms a coating film having excellent workability, crack resistance, and damage resistance. The water-based paint composition of the present disclosure contains a coating film-forming resin (A), a crosslinking agent (B), a sulfonic acid compound (C), and an amine compound (D), the coating film-forming resin (A) contains an acrylic resin (A1), the hydroxyl value of the coating film-forming resin (A) is 5 mgKOH / g or more and 35 mgKOH / g or less, the crosslinking agent (B) contains a peralkyl melamine resin (B1), and the neutralization rate of the acid group of the sulfonic acid compound (C) based on the amine compound (D) is 100% or more and 1,300% or less.

The invention discloses a diaphragm, a secondary battery and an electric device, and belongs to the technical field of batteries. The diaphragm provided by the invention comprises a porous base material and a functional coating arranged on the surface of at least one side of the porous base material, wherein the functional coating comprises ceramic particles and microcapsule particles; the microcapsule particle is of a core-shell structure and comprises a core layer and a shell layer, the core layer comprises erythritol, and the shell layer comprises melamine resin and nano silicon dioxide. According to the diaphragm provided by the invention, the ceramic particles and the microcapsule particles are introduced into the coating, so that the heat absorption capability and the heat conduction capability of the diaphragm can be effectively improved, and when the diaphragm is subsequently applied to preparation of a secondary battery, the obtained secondary battery has good thermal stability.

The invention relates to the technical field of building insulation boards, and particularly discloses an intelligent temperature-adjusting, insulation and decoration integrated board and a preparation method thereof. An intelligent temperature adjusting, heat preservation and decoration integrated plate sequentially comprises a thermochromic protective coating, a glass fiber reinforced cement decoration panel, a phase change microcapsule / polyurethane composite heat preservation core layer, an aluminum foil reflecting layer and a gypsum-based structural layer from the outdoor side to the indoor side. The phase-change microcapsule / polyurethane composite heat-preservation core layer is prepared by the following steps: uniformly mixing phase-change microcapsules with a polyurethane white material component A, then mixing with a polyurethane black material component B, pouring and foaming, and curing after foaming to obtain the phase-change microcapsule / polyurethane composite heat-preservation core layer; the core material of the phase change microcapsule is pentacosane, and the wall material is melamine resin. The intelligent temperature adjustment, heat preservation and decoration integrated plate can integrate multiple functions of efficient heat preservation, intelligent temperature adjustment, visual heat management indication and decoration.

The invention relates to the technical field of building materials, in particular to a low-creep anti-cracking sound insulation building material and a preparation method thereof. The low-creep anti-cracking sound insulation building material is prepared from 100 parts of epoxy resin, 30-50 parts of melamine resin, 10-20 parts of a polyamide curing agent, 5-15 parts of hollow glass beads, 3-8 parts of an additive A, 2-6 parts of an additive B and 0.5-2 parts of polyether modified polysiloxane, the raw materials of the additive A comprise betel nut shells, potassium hydroxide powder and powder; the additive B is prepared from the following raw materials: shellac resin, lipase, a phosphate buffer solution, basalt fibers and nano silicon dioxide. According to the invention, the additive A takes biochar as a skeleton, multilevel channels of the biochar can anchor polymer chain segments and limit slippage and rearrangement of molecular chains, so that the creep behavior of the material is inhibited, and the additive B forms a three-dimensional enhanced network at an interface through a biological and inorganic hybrid enhancement mechanism, so that the crack resistance of the material is effectively improved.

The application relates to the technical field of melamine resin polymer materials, in particular to a high-heat-resistance melamine resin composite material, which comprises a first component and a second component; the first component comprises modified melamine resin prepolymer, crosslinking accelerant, curing agent and first dispersant; the modified melamine resin prepolymer is prepared by modifying melamine resin prepolymer through lignosulfonate and modified nanocellulose whisker; the modified nanocellulose whisker is prepared by modifying nanocellulose whisker through a silane coupling agent; the second component comprises composite reinforcing material; the composite reinforcing material comprises carboxylated carbon nanotube, montmorillonite-graphene hybrid, second dispersant and nucleating agent; the carboxylated carbon nanotube is prepared by reacting carbon nanotube and strong acid; and the montmorillonite-graphene hybrid is prepared by reacting montmorillonite and graphene oxide. The melamine resin is modified by lignosulfonate and modified nanocellulose whisker, and the composite reinforcing material is combined to improve the heat resistance and mechanical properties of the melamine resin by using a gradient curing process.

The invention discloses high-flame-retardant low-VOC (volatile organic compound) acrylic acid composite resin and a preparation method thereof. The method comprises the following steps: reacting a melamine resin prepolymer, ammonium polyphosphate and a charring catalyst in an acidic water phase to prepare a microencapsulated synergistic flame retardant with a core-shell structure; then pentaerythritol, phosphorus oxychloride and hydroxyethyl methylacrylate are subjected to a reaction to synthesize a reaction type phosphorus flame-retardant monomer; finally, the monomer, methyl methacrylate, butyl acrylate, acrylic acid and the microencapsulated flame retardant are subjected to emulsion copolymerization in a water phase, and target resin is prepared. Through the synergistic effect of double mechanisms of reactive flame retardance and microencapsulation synergistic flame retardance, the limit oxygen index of the resin is larger than or equal to 32%, and flame-retardant components are stable and do not migrate; a water phase system is adopted in the whole process, the VOC source is controlled from the source, and the VOC content of the product is lower than 40 g / L. The obtained resin has excellent flame retardance, environmental protection property and good mechanical property, and is suitable for the field of high-end coatings and adhesives.

The invention relates to a wood material plate. The invention relates to a decorative article, comprising a core (1), at least one decorative layer (2) arranged on an upper side (1.1) above the core (1), at least one base layer (4) made of paper coated with resin below the at least one decorative layer (2), at least one cover layer (3) arranged above the decorative layer (2), and at least one recess (5) embossed in the upper side (1.1), characterized in that the at least one recess (5) is provided in the upper side (1.1). The resin is mixed resin composed of phenolic resin and melamine resin.