839 results about "Flame resistance" patented technology

This invention discloses a composite additive for repairing the foaming properties of recycled polystyrene, relating to the field of recycled polystyrene. It comprises: 30-50 parts of a matrix repair component, 20-35 parts of a nucleating-reinforcing composite component, 10-20 parts of an antibacterial and flame-retardant composite component, and 5-10 parts of a dispersant. Modified rosin ester and polybutadiene oligomers are used as the matrix repair component, combined with nano-calcium carbonate and talc as the nucleating-reinforcing composite component, and further combined with phytic acid and quaternized chitosan functional components and zinc stearate dispersant to form a stable composite system. This system imparts antibacterial and flame-retardant properties to the product, solving the problem of single-function traditional additives, significantly improving the quality of recycled material products, realizing high-value utilization of recycled materials, and simultaneously repairing damaged molecular chains in recycled materials, improving processing flowability and cell nucleation effect, thus compensating for the deficiency of reduced foaming performance in recycled polystyrene.

This application relates to the field of protective film materials technology, and discloses a weather-resistant and high-temperature-resistant silicone leather protective film and its preparation method. The weather-resistant and high-temperature-resistant silicone leather protective film of this application comprises a knitted fabric substrate layer and an organosilicon composite layer stacked sequentially from bottom to top; wherein, the raw materials of the organosilicon composite layer include: methyl vinyl silicone rubber, modified fumed silica, hydroxyl silicone oil, hydrogen-containing silicone oil, platinum catalyst, UV stabilizer, flame retardant, and antioxidant; the modified fumed silica is obtained by modifying fumed silica with a composite silane coupling agent, and the specific surface area of ​​the fumed silica before modification is 200~400 m² / g. 2 / g. The preparation method of this application is simple and efficient. Through the steps of substrate pretreatment, mixing of adhesives, composite molding, and post-treatment, the resulting weather-resistant and high-temperature resistant silicone leather protective film has excellent mechanical strength, weather resistance, high-temperature resistance, and flame retardant properties.

This invention discloses a lightweight, flame-retardant, medium-voltage aluminum alloy cable for new energy charging stations, relating to the field of aluminum alloy cable technology. It includes a cable core and an aluminum alloy armor layer and an outer sheath layer sequentially wrapped around the cable core from the inside out. The aluminum alloy armor layer consists of an inner armor layer and several outer armor layers fitted onto the inner armor layer. The two ends of the outer armor layers are slidably connected to the inner armor layers, and a thermal expansion agent is filled between adjacent outer armor layers. The inner surface of the outer armor layer has several annularly distributed guide rods, and the inner armor layer has several grooves corresponding to and slidably sealed to the guide rods. Component B is encapsulated in the grooves, and component A is encapsulated in the guide rods. The lower end of the guide rods has a valve that allows component B to enter component A to react and release the flame-retardant material. This invention improves the flame-retardant performance of the aluminum alloy cable by creating a chemical-physical protective barrier through the interlocking of the thermal expansion agent and the outer armor layer.

The application discloses a water-based fire-retardant paint for wood surface and a preparation method thereof, and the paint is prepared by using a water-based resin emulsion as a matrix, using natural phytic acid as a core fire-retardant component and through an innovative pre-neutralization process. The specific method is as follows: first, phytic acid solution is mixed with a pH regulator to adjust the pH to 6.0-8.5 to obtain a neutralized premix; then, the premix is mixed with the water-based resin emulsion and film-forming aids; finally, wetting dispersants, defoaming agents, thickening agents and other aids are added to obtain the paint. Through the pre-neutralization step, the key problem that the strong acidity of phytic acid leads to the demulsification of the resin emulsion and the deterioration of the coating performance is effectively solved, so that the natural phytic acid can be stably and efficiently applied to the water-based system. The obtained paint is environment-friendly, storage-stable and easy to operate, and the coating formed by coating the paint on the wood surface has excellent fire-retardant performance and good physical properties such as adhesion and water resistance, so that the integration of wood decoration, protection and fire retardation is realized.

This invention relates to the field of insulation materials technology, specifically to a high-strength, tear-resistant, halogen-free, flame-retardant insulating material and its preparation method. The high-strength, tear-resistant, halogen-free, flame-retardant insulating material comprises the following components by weight: 70-90 parts EPDM rubber, 5-15 parts thermoplastic elastomer, 15-25 parts medium-density polyethylene, 10-20 parts ethylene-vinyl acetate copolymer, 3-5 parts triallyl isocyanate, 2-4 parts sulfur, 1-3 parts polyethylene wax, 3-5 parts zinc oxide, 1-3 parts antioxidant, 30-50 parts aluminum hydroxide, 20-40 parts modified silica, 0.2-0.5 parts ultraviolet absorber, 1-3 parts accelerator, and 2-4 parts silicone masterbatch. The high-strength, tear-resistant, halogen-free, flame-retardant insulating material prepared by this invention exhibits excellent tensile and tear resistance and flame-retardant properties, thereby extending its service life.

This application provides a flame-retardant silicone and its preparation method. In this flame-retardant silicone, through the synergistic effect of boron-containing polysiloxane prepolymer and functionalized boron nitride, the flame-retardant silicone has an afterflame time of ≤5s at 800℃, an oxygen index of ≥36%, and has passed UL94V-0 certification. It can quickly form a ceramic barrier layer at high temperatures, effectively preventing flame propagation. The helical structure of the siloxane main chain, combined with the reinforcing effect of functional fillers such as nano-fumed silica, low-melting-point glass powder, and activated inorganic smoke suppressant and flame retardant, makes the tensile strength of the flame-retardant silicone ≥45N, and the permanent tensile modulus retention rate ≥85% under 125% radial shrinkage, exhibiting excellent tear resistance. This flame-retardant silicone is suitable for applications requiring high flame-retardant performance, such as new energy cables and electronic device protection.

This utility model provides a pressure-resistant and flame-retardant PE hollow-wall spiral wound pipe, belonging to the technical field of hollow-wall spiral wound pipes. The pressure-resistant and flame-retardant PE hollow-wall spiral wound pipe provided by this utility model features a reinforcing tube with reinforcing ribs spirally wound on its outer circumference. Pressure-resistant filler is filled into the reinforcing ribs, improving the overall rigidity and pressure resistance of the spiral wound pipe, making it less prone to deformation and damage under external pressure. Simultaneously, a plastic spring is provided between the reinforcing tube and the spiral wound pipe body, providing internal support to the reinforcing tube and enhancing its ring stiffness and axial stiffness. Due to the plastic spring and the spirally wound reinforcing ribs on the outer circumference of the reinforcing tube, stress concentration is reduced, resulting in excellent bending resistance and preventing breakage of the spiral wound pipe. Furthermore, a flame-retardant and heat-insulating layer and a corrosion-resistant layer are provided on the outer circumference of the reinforcing tube, improving the flame retardancy and corrosion resistance of the spiral wound pipe.

The application provides a flame-retardant composite shielding material and a preparation method and application thereof, and belongs to the technical field of nuclear radiation shielding materials. The flame-retardant composite shielding material comprises the following components in parts by mass: 10-20 parts of high-density polyethylene, 68-81 parts of lead, 0.5-4 parts of boron carbide and 9-20 parts of a flame retardant. By adopting high-density polyethylene, lead, boron carbide and a flame retardant and controlling the mass fraction of each component, the heat resistance, flame retardance and shielding performance of the flame-retardant composite shielding material can be improved.

The utility model belongs to the technical field of seat, disclose a kind of multilayer fire -retardant noise absorption seat backplate, including backplate body, the backplate body is made of five layers structure composite, the backplate body includes abrasion -resistant fire -retardant surface layer, perforated sound-absorbing layer, soundproof layer, damping layer and support backplate that are sequentially arranged, each layer is integrally formed by hot pressing, the abrasion -resistant fire -retardant surface layer is located outermost layer.The utility model can effectively block external fire source and delay flame spread by abrasion -resistant fire -retardant surface layer, perforated sound-absorbing layer and soundproof layer can efficiently absorb medium-high frequency noise by micro-perforation resonance and porous sound-absorbing, and damping layer further inhibits structural vibration energy transmission, solve the problem that traditional seat backplate is insufficient in fire -retardant and single in noise absorption means.

This invention relates to the field of power cable technology and discloses a wear-resistant modified PE sheathed power cable with a braided reinforcement layer. From the inside out, the invention comprises a conductor, an insulation layer, a filler layer, a metal shielding layer, an inner sheath layer, a buffer layer, an armor layer, a double-gradient braided layer, and an outer sheath layer. The buffer layer is filled with nano-magnesium hydroxide particles and hollow glass microspheres to enhance buffering energy absorption and flame retardant performance, resisting external impacts and fire risks. The double-gradient braided layer uses a blended fiber design to enhance tensile strength and dynamic friction reduction, adapting to dragging and stretching conditions. The outer sheath layer, with its helical interlocking structure and graphene molybdenum disulfide modified ridge surface, enhances wear resistance and load-bearing capacity, resisting wear in complex environments. The synergistic effect of each functional layer comprehensively improves the overall performance of the cable.

The present application relates to the field of rubber, in particular to a kind of flame-retardant neoprene and preparation method thereof.The present application first prepares the raw material of flame-retardant neoprene, mixes and masticates the raw material under certain conditions to obtain mixed rubber, and finally vulcanizes the mixed rubber to prepare a kind of flame-retardant neoprene;Its characteristics lie in that the composition of flame-retardant agent in the raw material of flame-retardant neoprene is the mixture of nano zinc oxide and nano magnesium oxide modified by silane coupling agent grafted onto hyperbranched polyester structure, which can improve the dispersibility of nano structure on one hand, prevent the occurrence of agglomeration phenomenon, and at the same time, the reaction efficiency can be improved by grafting the reactants together;On the other hand, the phosphorus-containing group and nitrogen-containing group of urea and phosphoric acid are grafted onto the hyperbranched polyester structure, so that the groups of hyperbranched polyester are rich in flame-retardant elements nitrogen and phosphorus, thereby significantly improving the flame-retardant performance of neoprene.

The application provides a polyester composite material and a preparation method and application thereof, the polyester composite material comprises polybutylene terephthalate, polycarbonate, a bromine-containing flame retardant, a synergistic flame retardant and a toughening agent in specific proportions, and the bromine-containing flame retardant comprises a combination of at least two of brominated epoxy resin, brominated polycarbonate or brominated polystyrene; by selecting polybutylene terephthalate and polycarbonate for collocation, and adding at least two specific bromine-containing flame retardants and synergistic flame retardants for flame-retardant modification, the obtained polyester composite material not only has excellent flame-retardant performance, but also has a low amount of die drool when being extruded in an extruder die, thereby effectively avoiding the problem that the die drool is carbonized at high temperature and then flows into the product to contaminate the product, and effectively improving the product quality of the finally obtained polyester composite material.

The invention discloses copolymerized flame-retardant polycarbonate and a preparation method thereof. The preparation method comprises the following steps; diester carbonate, isosorbide, aliphatic diol, a first flame-retardant monomer and a second flame-retardant monomer are subjected to a reaction in the presence of a catalyst, and the copolymerized flame-retardant polycarbonate is obtained, wherein the first flame-retardant monomer comprises one or more than two of compounds with a structure as shown in a formula I: in the formula I, R1 and R2 are respectively and independently selected from one of carboxyl, alkyl ester group and hydroxyalkyl ester group; the second flame-retardant monomer comprises one or more than two of compounds with a structure as shown in a formula II; in the formula II, R3 and R4 are independently selected from one of carboxyl and alkyl ester. The polycarbonate provided by the invention has better thermal properties and mechanical properties while the flame retardant property is improved.

The objective of the present invention is to provide a polyurethane foam composition having multifunctionality that can secure high density and high strength, as well as corrosion resistance, water and moisture resistance, and flame retardancy, with just a single application of polyurethane foam, and a construction method using the same.

This invention discloses a ceramicized flame-retardant PBT composite material containing a bio-based carbon source and its preparation method, belonging to the field of polymer materials technology. The composite material uses PBT resin as a matrix and contains the following components: 5-30 parts of bio-based carbon source, 5-25 parts of phosphorus-based flame retardant, 5-20 parts of ceramicizing agent, and 5-20 parts of flux, or 0.1-2 parts of anti-dripping agent and 0.1-1 parts of antioxidant. Specifically, the bio-based carbon source is esterified cellulose or hyperbranched bio-based polyester. This invention constructs a quaternary synergistic system of bio-based carbon source-phosphorus-based flame retardant-ceramicizing agent-flux, which catalyzes the formation of a robust and dense ceramic protective layer during combustion, endowing the material with excellent flame-retardant properties, achieving a UL-94 V-0 rating and a limiting oxygen index greater than 30%, while maintaining the mechanical properties of the matrix. The process is simple, suitable for industrial production, and can be widely used in fields with high flame-retardant safety requirements, such as electronics, electrical appliances, and automobiles.

A copolyester composition comprising a metal phosphinate flame retardant, an acrylic silicone impact modifier, and a silicate mineral, which provides high tensile and / or flexural modulus while maintaining thermal and impact properties and having improved flame retardant properties, a method for manufacturing the copolyester composition, and an article manufactured from the copolyester composition are provided.

This invention belongs to the field of preparation technology of polyethylene-containing organic polymer compounds, and particularly relates to a rotational molding part and its preparation process, comprising the following steps: dispersing modified alumina and modified ammonium polyphosphate in anhydrous ethanol, adding EGDMA, VTMS hydrolysate and an initiator, mixing, heating, stirring and reacting, slowly adding TEOS hydrolysate under continuous stirring, filtering, washing, heating and curing, immersing in preheated silicone oil, cooling, filtering, washing and dispersing, and drying to obtain flame-retardant powder; mixing the flame-retardant powder, high-density polyethylene and crosslinking agent, extruding in an extruder, pelletizing, drying, pulverizing, sieving, and then rotationally molding to obtain the rotational molding part. This invention can slow down the loss of modified ammonium polyphosphate in high temperature and high humidity environments and improve the long-term stability of the flame retardancy of the rotational molding part.

This invention discloses a flame-retardant and anti-aging cable composite material and its preparation method, belonging to the field of cable material preparation technology. In this invention, a flame-retardant, high-temperature resistant polysiloxane containing double bonds, an anti-aging agent, and a flame-retardant filler are prepared and blended with raw materials such as EVA and low-density polyethylene. Irradiation causes cross-linking between the materials, endowing the composite material with heat resistance, aging resistance, and good mechanical properties. The anti-aging agent of this invention includes siloxane groups and benzophenone groups, possessing good resistance to both UV aging and heat aging, which is beneficial for further improving the anti-aging performance of the prepared cable composite material. The flame-retardant filler of this invention has urethane bonds grafted onto its surface, which matches the polarity of the EVA vinyl acetate segments, improving the compatibility between the flame-retardant filler and EVA, and further enhancing the flame retardancy of the prepared composite cable material.

The invention belongs to the technical field of aeronautical materials, and particularly relates to a PEI modified material containing a high-temperature composite dispersion system as well as a preparation method and application of the PEI modified material. The PEI modified material containing the high-temperature composite dispersion system provided by the invention is prepared from the following raw materials: polyetherimide resin, titanium dioxide, carbon black and dispersing agents (a coupling agent and polyamide wax). The PEI modified material containing the high-temperature composite dispersion system provided by the invention can realize efficient and uniform dispersion and color regulation and control of pigments in a high-viscosity and strong-polarity system, and has excellent heat resistance, mechanical property and flame retardant property, and interior structural parts prepared from the PEI modified material meet the comprehensive requirements on light weight, attractiveness and durability in the aviation field.

The present invention relates to the technical field of wood-plastic composites, and provides a PVC wood-plastic material having strong smoke suppression and flame retardancy, and a preparation method therefor. The PVC wood-plastic material comprises the following components in parts by weight: 70-100 parts of a PVC resin, 20-30 parts of wood powder, 20-30 parts of calcium carbonate, 15-20 parts of a smoke suppression material, 10-15 parts of a flame retardant, 1-6 parts of a foaming agent, 5-10 parts of a stabilizer, 1-2 parts of a coupling agent, 5-10 parts of a processing aid, and 1-4 parts of a lubricant, wherein the smoke suppression material comprises a molybdenum compound, ferrocene and an oxalate dihydrate in a mass ratio of 1:(0.5-1.5):(5-10). The preparation method comprises the end-capping modification of the wood powder and the preparation of the PVC wood-plastic material. The prepared PVC wood-plastic material has excellent flame retardancy and smoke suppression properties.

A flame-retardant, antistatic, waterproof, and breathable functional composite fabric, its manufacturing method, and its application are disclosed, relating to the field of textile fabric technology. The composite fabric comprises a flame-retardant and antistatic fiber fabric outer layer, a waterproof and breathable membrane middle layer, and a flame-retardant inner lining layer. These layers are sequentially laminated together using hot melt adhesive. The composite process forms a multi-layer structure. The introduction of flame-retardant and antistatic fiber fabric in the outer layer effectively improves the composite fabric's high-temperature resistance, reducing the risk of melting or deformation near fire sources. The inner and outer layers are woven from aramid conductive fibers, possessing excellent flame-retardant and antistatic properties, providing convenience and safety for industrial workers. The waterproof and breathable membrane middle layer ensures the fabric is breathable and cool to wear, guaranteeing all-around protection and comfort in special environments. This invention's composite fabric has advantages such as lightweight, high-temperature resistance, flame retardancy, windproof warmth retention, and good antistatic properties.

The utility model discloses a low smoke halogen -free flame -retardant low -voltage cable relates to cable flame -retardant technical field, including flame -retardant cable wire insulation cover, cable storehouse, cable and conductor, the outer surface installation flame -retardant cable wire insulation cover of cable adopts low smoke halogen -free flame -retardant material such as crosslinked polyethylene, it has good insulating property and flame -retardant performance, can effectively prevent current leakage and short circuit, and reduce the generation of smoke and toxic gas when burning, three -point formula separation baffle will the inner portion of flame -retardant cable wire insulation cover into three parts, formed cable storehouse, to store and protect cable, cable cover is in the outer surface of oxygen -resistant layer, and oxygen -resistant layer adopts inorganic metal compound material, when cable combustion, oxygen -resistant layer is heated and is decomposed, releases crystallization water and other substances, absorbs a large amount of heat energy, thereby reducing the temperature of outer layer combustible and surrounding environment, makes the cable that ignites self -extinguish, and the conductor cover adopts the insulating material and is made to protect the conductor.

The application relates to the field of sealing rings and discloses a silicon rubber sealing ring for capacitors and a preparation method thereof, which comprises the following components: silicon rubber, modified multi-walled carbon nanotubes, hyperbranched triazine-based additives, vulcanizing agents and lubricants; the modified multi-walled carbon nanotubes are prepared by modifying multi-walled carbon nanotubes after introducing double bonds into a benzotriazole intermediate and glycidyl methacrylate in a hydrogen-containing silicone oil molecular chain through a silicon hydrogen addition reaction; the benzotriazole intermediate is prepared by substitution between 2-(2,4-dihydroxyphenyl)-2H-benzotriazole and acryloyl chloride; the hyperbranched triazine-based additives are prepared by nucleophilic substitution reaction with a diamino phosphorus antioxidant prepared by reaction between phenylphosphoryl dichloride and p-phenylenediamine and cyanuric chloride as a monomer; the application is provided with good mechanical properties, antistatic properties, flame retardant properties and aging resistance by adding the modified multi-walled carbon nanotubes and the hyperbranched triazine-based additives.

This invention discloses a halogen-free flame-retardant polypropylene material and its preparation method, comprising 60-80 parts of polypropylene (PP), 4-8 parts of toughening agent, 15-25 parts of halogen-free flame retardant, 1-1.5 parts of antioxidant, 2-3 parts of light stabilizer, and 5-10 parts of modified graphene oxide flame retardant synergist. The modified graphene oxide flame retardant synergist is prepared by "nucleophilic substitution acyl chloride-nucleophilic substitution amidation-electrostatic interaction" using graphene oxide (GO), anhydrous sulfoxide, an amine compound H2N-R-NH2 containing at least two terminal primary amino groups, and molybdate. The -R- group is a divalent organic group used to connect the amide bond to the terminal primary amino group. The modified graphene oxide flame retardant synergist includes at least one amide bond -CONH-R-N- connected to the terminal primary amino group. The halogen-free flame-retardant polypropylene material provided by this invention exhibits excellent flame retardant properties while also improving its impact resistance and anti-dripping effect, and is safe and environmentally friendly.

The utility model provides an automatic device of aluminium foil curtain is painted fire -retardant, relates to aluminium foil curtain processing technical field, including feed leveling component and drying part, the inner side of feed leveling component is provided with the feeding smearing mechanism of bolt assembly, the other end of feed leveling component top is provided with drying part, drying part contains bridging seat, bridging roller, bearing bin, spread roller group, culvert box, fan, rear frame and discharge roller group, bridging seat sets up the other end top of feed leveling component, the inside of bridging seat top is provided with bridging roller, the outer end of bridging seat is provided with bearing bin, just the inner side of bearing bin is provided with spread roller group, the utility model mainly is with carousel, link roller, screw rod, sliding block and leveling roller to the product are carried out leveling tension output after, make the overall contact of pressure roller, pressure roller makes brush fire -retardant reach continuous, like this the effective guarantee of product's fire -retardant performance.

The application relates to the technical field of chemical protection materials, and discloses a hydrofluoric acid protective garment and a preparation method thereof. The material of the protective garment comprises a 5-layer structure, the middle layer is a framework fabric, and modified natural rubber layers and modified EPDM (ethylene propylene diene monomer) rubber layers are sequentially arranged on the two sides of the framework fabric. The raw materials of the modified natural rubber comprise, by weight parts, natural rubber 100 parts, sulfur 3-4 parts, accelerator M 1-2 parts, accelerator DM 1-2 parts, zinc oxide 4-6 parts, stearic acid 1-2 parts, white carbon black 10-15 parts, calcium oxide 20-40 parts, chlorinated paraffin 5-15 parts, antimony trioxide 5-15 parts and antioxidant 4010NA 1-2 parts. The modified natural rubber and the modified EPDM rubber are used as main protection substances, and organic solvents are used as carriers, so that the hydrofluoric acid protective garment not only has long-acting protection capability for hydrofluoric acid, but also has the characteristics of high mechanical strength, heat aging resistance, flame resistance and low-temperature softness.