72results about How to "High flame retardant efficiency" patented technology

The invention discloses a multifunctional coating with flame retardance, bacteriostasis and electromagnetic shielding as well as preparation and application of the multifunctional coating, and belongs to the technical field of textiles. The preparation method comprises the following steps: firstly, preparing a flame-retardant solution by combining phosphorylated sodium alginate and MXene, and padding a fabric into the solution to obtain a fabric with a flame-retardant function; the preparation method comprises the following steps: preparing a flame-retardant solution, adsorbing zanthoxylum bungeanum essential oil by adopting mesoporous silica to prepare a bacteriostatic agent solution, mixing the flame-retardant solution, the bacteriostatic agent solution and polyvinylpyrrolidone to obtain a flame-retardant and bacteriostatic composite solution, and padding a fabric into the flame-retardant and bacteriostatic composite solution to obtain a fabric with flame-retardant and bacteriostatic functions; mXene solution is sprayed on the fabric with the flame-retardant and antibacterial functions to serve as an enhanced electromagnetic shielding layer, and the multifunctional fabric with the flame-retardant, antibacterial and electromagnetic shielding functions is prepared. The flame-retardant solution and the bacteriostatic agent solution are both made of bio-based materials, have the advantages of being low in price, environmentally friendly and degradable, and can also be used as coatings to be applied to multiple fields.

The present invention relates to a multifunctional polyester fiber based on modified graphene and a preparation method thereof, and belongs to the technical field of functional fibers. The preparation method comprises the following steps: dissolving dopamine hydrochloride, benzaldehyde compounds and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide in an alcohol solution to obtain a modified solution; under alkaline conditions and the action of a catalyst, graphene is polymerized in the modified solution to obtain modified graphene; granulating the modified graphene and polyester powder to obtain a multifunctional polyester masterbatch; spinning the multifunctional polyester masterbatch and polyester slices to obtain a multifunctional polyester fiber based on modified graphene, wherein the far-infrared normal emissivity is 0.90-0.93, the far-infrared radiation temperature rise is 2.6°C-3.3°C, the breaking strength is 3.1cN / detx-3.3cN / detx, the limiting oxygen index is 28.5%-29.1%, and the antibacterial property is higher than 99.9%.

The present invention belongs to the technical field of flame-retardant fabrics, and relates to a method for preparing a durable flame-retardant nylon 6 fabric based on a reactive phosphorus-sulfur flame retardant, specifically: after adding nylon 6 fabric to a finishing solution containing a reactive phosphorus-sulfur flame retardant, a free radical initiator and a solvent a, reacting at 75-85°C for 6-8h to obtain a durable flame-retardant nylon 6 fabric; the limiting oxygen index of the durable flame-retardant nylon 6 fabric is higher than 29.3%, the damaged length is lower than 10.5cm, no molten droplets are generated, and after 40 washes, it can still pass the vertical burning test, the damaged length is lower than 14.4cm, and no molten droplets are generated. The flame-retardant nylon 6 fabric prepared by the method of the present invention has good flame retardant effect and excellent water-washing resistance.

The invention discloses a modified epoxidized polybutadiene-containing layer-adding adhesive film for an FC-BGA packaging carrier plate as well as a preparation method and application of the modified epoxidized polybutadiene-containing layer-adding adhesive film. The layer-adding adhesive film is prepared from the following components in parts by weight: 45 to 100 parts of epoxy resin, 40 to 100 parts of inorganic filler, 25 to 45 parts of cyanate ester, 35 to 55 parts of bismaleimide, 5 to 10 parts of graphite and 10 to 20 parts of modified epoxidized polybutadiene. The preparation method of the modified epoxidized polybutadiene comprises the following steps: dissolving carboxyl-terminated polybutadiene in a first organic solvent, adding a formic acid solution and a hydrogen peroxide solution, and reacting to obtain carboxyl-terminated epoxidized polybutadiene; the preparation method comprises the following steps: dissolving carboxyl-terminated epoxidized polybutadiene in a first organic solvent, then adding (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide), and carrying out a reaction so as to obtain the modified epoxidized polybutadiene. During combustion, phosphorus groups contained in the modified epoxidized polybutadiene generate phosphaphenanthrene groups in a gas phase, free radicals of gas-phase cracking gas can be captured, a stable structure is formed, the free radical quenching effect is achieved, and the flame retardant efficiency of the layer-adding adhesive film is improved.

The invention discloses tough, flame-retardant and hydrophobic reactive polyurethane (RPU) based on polyhydroxy ammonium polyphosphate as well as a preparation method and application thereof, and belongs to the crossing field of flame-retardant materials and multifunctional polymers. The specific preparation process is as follows: diglycolamine is grafted to the surface of ammonium polyphosphate through a one-pot ion exchange reaction, and hydroxylated ammonium polyphosphate (aAPP) is prepared. The preparation method comprises the following steps: preparing an aAPP-NCO double-end-capped prepolymer, then carrying out an addition polymerization reaction on the aAPP and the NCO double-end-capped prepolymer under a medium-free condition to prepare flame-retardant RPU (aAPPx-RPU), further introducing polydimethylsiloxane (PDMS) into an RPU main chain, and preparing the tough, flame-retardant and hydrophobic RPU by utilizing the synergistic effect of phosphorus (P), nitrogen (N) and silicon (Si). The preparation method of the tough, flame-retardant and hydrophobic RPU is green and efficient, and can be applied to the fields of fireproof flame-retardant materials, building materials, electronic materials and the like which need to improve safety and durability.

The utility model relates to the technical field of hollow plastic plates, in particular to a flame-retardant hollow plastic plate which comprises a mounting frame, a hollow plate, a sealing plate and a filtering plate, the mounting frame is arranged in a cross shape, connecting plates are fixedly connected to the four corners of the outer wall of the mounting frame, a connecting groove is formed in the outer wall of one side of the hollow plate, and the sealing plate is arranged in the connecting groove. The connecting plate is matched with the connecting groove in size, a first mounting hole is formed in the outer wall of one side of the top end of the hollow plate, a second mounting hole is formed in the outer wall of the top end of the connecting plate, mounting grooves are formed in the outer walls of the two sides of the two sides of the mounting frame, and the sealing plate and the filter plate are matched with the mounting grooves in size. According to the hollow plastic plate, the mounting frame arranged in the cross shape can be used for connecting and mounting four hollow plates at the same time, a plurality of groups of hollow plates can be spliced conveniently only by aligning the mounting frame, a water inlet position and a water spraying position can be connected, the cost is reduced, meanwhile, the flame-retardant effect is improved, and the flame-retardant efficiency of the hollow plastic plate is improved.

Disclosed are a hybrid dialkylphosphinic acid salt, and a preparation method therefor and an application thereof. The hybrid dialkylphosphinic acid salt is at least one of compounds represented by Formula (I). The hybrid dialkylphosphinic acid salt of Formula (I) provided herein features a low required loading level, high flame retardant efficiency for various polymers, and high economic efficiency. The present invention overcomes the disadvantage of low flame retardant efficiency of diethylphosphinate in polymers as well as high volatility and low flame retardant efficiency for polyesters of diisobutylphosphinate. The hybrid dialkylphosphinate salt of Formula (I) can be widely applied to flame retardant polymers which require high-temperature processing.

The invention relates to a fluoride-free flame-retardant HIPS (high impact polystyrene) resin composition and a preparation method thereof. The composition comprises the following components in parts by weight: 62-75 parts of HIPS resin; 5-15 parts of polyphenyl ether resin; 10-18 parts of a brominated aromatic flame retardant; 3-8 parts of a styrene toughening agent; 1.0 to 2.0 parts of an antimony flame retardant synergist; 1-3 parts of a ceramic carbonizing agent; 1-3 parts of a polyol charring agent; 0.2 to 0.5 part of an antioxidant; 0.1-0.5 part of a light stabilizer; and 0.5 to 1.0 part of lubricant. The preparation method comprises the following steps: stirring and fully mixing the raw materials in a high-speed mixer, and carrying out material melting, shearing, homogenizing, bracing, cooling and pelletizing under the conveying, shearing and mixing of screws by a twin-screw extruder to obtain the fluoride-free flame-retardant HIPS resin composition. The invention solves the problem that the traditional flame-retardant HIPS resin needs an anti-dripping agent PTFE for synergistic flame retardance but cannot meet the PFAS prohibition. The material can be widely applied to the fields of display rear shells, chargers, electric control boxes, electric appliance shells and the like.

The invention discloses a fire-resistant heat-insulating polyurethane microporous rubber and a preparation method and application thereof, and relates to the technical field of fireproof and heat-insulating materials. The fire-resistant heat-insulating polyurethane microporous rubber is prepared from component A and component B in a weight ratio of 100:(45-55); the component A includes the following components in weight percentage: 25-40% polyether polyol, 5-10% polyester polyol, 15-25% ceramic powder, 15-25% nickel aluminum phosphate, 12-31% flame retardant, 1.5-8.5% foaming agent, 0.5-1.5% foam stabilizer, and 0.05-0.2% catalyst; the component B is polymethylene polyphenyl polyisocyanate. The non-expansion ceramic flame retardant scheme adopted by the invention is conducive to the improvement and stabilization of the flame retardant grade of the polyurethane microporous rubber and the ceramic structural strength.

The invention discloses an anti-aging and anti-electromagnetic shielding cable and a preparation method thereof, and belongs to the field of high voltage and the technical field of materials, the anti-aging and anti-electromagnetic shielding cable structurally contains a polyurethane-polyethylene copolymer and a flame-retardant and anti-electromagnetic sheet composite carrier, contains a polyurethane chain segment which is connected with a polyethylene main chain through a covalent bond, has no interface separation risk, and has good anti-aging and anti-electromagnetic shielding effects. Polyethylene is resistant to acid, alkali and salt mist, a carbamate group in a polyurethane chain segment can capture free radicals generated by photooxidation and thermal oxidation of polyethylene, aging is delayed from the molecular level, and the flame-retardant anti-electromagnetic sheet composite carrier endows the cable with good aging resistance and anti-electromagnetic shielding characteristics; the lamellar structure of the sheet-shaped carrier can block heat transfer and combustible volatilization, and the lamellar structure and the sheet-shaped carrier synergistically improve the flame-retardant efficiency; the introduction of the flaky composite carrier not only endows functional characteristics, but also can be used as a rigid reinforcement phase, so that the wear resistance and the extrusion resistance of the cable are improved, and the loss of the cable in the dragging and construction processes is reduced.

The invention relates to a fluoride-free flame-retardant polyester reinforced resin composition as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The resin composition comprises the following components in parts by weight: 15-55 parts of PBT resin; 0 to 20 parts of PET resin; 10 to 50 parts of glass fiber; 10 to 15 parts of brominated aromatic flame retardant; 1-3 parts of a compatilizer; 1-5 parts of a toughening agent; 1.5 to 3.0 parts of an antimony flame retardant synergist; 2-5 parts of a high carbon residue charring agent; 0.2 to 0.5 part of an antioxidant; and 0.5 to 1.0 part of a lubricant. Compared with the prior art, the fluorine-free flame-retardant polyester reinforced resin prepared by the invention not only has excellent mechanical properties and good processability, but also has lower cost and wide application scenarios.

The invention provides a flame-retardant antistatic nylon fiber with a skin-core structure and a preparation method of the flame-retardant antistatic nylon fiber, and belongs to the technical field of nylon fibers. The flame-retardant antistatic nylon fiber comprises an antistatic nylon skin layer and a flame-retardant nylon core layer, the outer surface of the flame-retardant nylon core layer is coated with the antistatic nylon skin layer, the antistatic nylon skin layer comprises a nylon 6 matrix and an antistatic agent, and the antistatic agent is aniline modified zirconium phosphate; wherein the aniline modified zirconium phosphate is obtained by carrying out in-situ polymerization on aniline monomers between stripped zirconium phosphate layers. The flame-retardant antistatic nylon fiber is obtained through sheath-core composite melt spinning. According to the invention, the antistatic agent and the flame retardant are efficiently and stably introduced into the nylon matrix, and the synergistic effect of the antistatic agent and the flame retardant is realized, so that the fiber has better spinnability and mechanical property, and meanwhile, the long-term effect and durability of the function are ensured.

The application discloses a preparation method of a P / N / Si multi-element reactive halogen-free flame retardant, specifically comprising the following steps: preparing DOPO grafted 3-chloropropyl trimethoxysilane, which is denoted as PPTMS; preparing a cage-like POSS containing DOPO, which is denoted as PSC; mixing the PSC with toluene to obtain a PSC solution; uniformly mixing maleimide MI with toluene, dropwise adding the PSC solution into the maleimide MI solution to perform a condensation reflux reaction, and performing vacuum rotary evaporation to obtain the P / N / Si multi-element reactive halogen-free flame retardant. The phosphorus-containing monomer, the nitrogen-containing monomer and the silicon-containing monomer in the flame retardant are covalently bonded, and the multi-elements in the molecule exist in the form of a collection acid source, a carbon source, a gas source and a ceramicization, wherein the phosphorus-containing monomer is dehydrated into carbon, the nitrogen-containing monomer releases non-combustible gas to dilute the gas phase, and the silicon-containing monomer forms a dense ceramic barrier layer to improve the triple synergy of carbon residue strength and anti-dripping property, thereby greatly improving the flame retardant efficiency.

The present application relates to a kind of multifunctional composite fabric with wave-absorbing, flame-retardant, ultraviolet absorption and a preparation method thereof.In the present application, by material intrinsic design and structure control, the synergistic technology of realizing wave-absorbing, flame-retardant, ultraviolet-resistant and other multiple functions integrated in fabric substrate under low filler addition amount is obtained.

The present application relates to a kind of high flame-retardant low-toxicity environmental protection computer cable and its preparation method, belong to computer cable technical field.The insulating layer and / or sheath layer of the cable uses environmental protection toughening flame-retardant composite material, it is with polyolefin resin as matrix, compound modified nano-aluminum hydroxide with KH560 silane coupling agent, melamine cyanurate, gradient compound ethylene-vinyl acetate copolymer and maleic anhydride graft polyolefin, by limiting core component ratio and key parameter, realize high flame-retardant, low-toxicity environmental protection and low-temperature toughness Synergistic unity.The present application process is simple and easy industrialization, applicable to computer room, automation control system, instrument signal transmission and other scenes, practicality is strong.

This invention provides a halogen-free flame-retardant UV-moisture-curing polyurethane conformal insulating resin and its preparation method, belonging to the field of polymer materials technology. The conformal insulating resin of this invention is prepared from the following raw materials in parts by weight: 100 parts HDI trimer, 50-120 parts organosilicon-modified polyol, 10-40 parts chain extender containing a hindered phenol-phosphate structure with bifunctional groups, 15-45 parts hydroxyl-containing acrylate, 2-10 parts photoinitiator, 0.1-1.5 parts polymerization inhibitor, and 20-80 parts reactive diluent. This invention embeds hindered phenol-phosphate synergistic flame-retardant groups into the polyurethane backbone, achieving a UL94V-0 rating and limiting oxygen index ≥32% under halogen-free conditions; the UV-moisture dual-curing mechanism increases the crosslinking degree in the shaded area from 65% to 95%, significantly improving the integrity of the insulation protection.

This invention discloses a PVC cable sheath material, comprising the following components by weight: 100 parts PVC resin; 26-40 parts cold-resistant rubber; 45-53 parts cold-resistant plasticizer; 45-52 parts filler; 10-26 parts flame retardant; 9-15 parts heat stabilizer; 0.5-1.2 parts antioxidant; 2.0-3.5 parts lubricant; and 0-1.2 parts colorant. This invention also discloses a method for preparing the PVC cable sheath material and a cold-resistant and flame-retardant cable. The PVC cable sheath material of this invention has excellent cold resistance and flame retardancy, and can meet the requirements for cable sheath use in extremely cold environments of ~40℃ and below.

This application provides a charging pile sheath composite material, made from at least the following raw materials in parts by weight: 60-80 parts of thermoplastic polyurethane elastomer, 5-15 parts of polyketimide, 10-20 parts of halogen-free flame retardant additives, and 1.5-3.0 parts of functional additives. This application also provides a method for preparing the charging pile sheath composite material, comprising the following steps: S1, melt-blending polyketimide with thermoplastic polyurethane elastomer or thermoplastic polyester elastomer, and granulating to obtain a pre-dispersed masterbatch; S2, melt-blending the pre-dispersed masterbatch, the remaining thermoplastic polyurethane elastomer, halogen-free flame retardant additives, and functional additives, and granulating to obtain the charging pile sheath composite material. The charging pile sheath composite material and preparation method provided in this application, by optimizing the raw material composition and ratio and the two-step processing technology, utilizes the dispersing and self-lubricating properties of polyketimide, combined with the flame-retardant synergistic effect of the halogen-free flame retardant additives, to improve the flame-retardant and wear-resistant properties of the charging pile sheath composite material.

The present invention relates to a heat storage flame retardant polyester fiber based on modified cesium tungsten bronze and a preparation method thereof, belonging to the technical field of functional fibers. The preparation method of the present invention comprises the following steps: S1, dropping an aminosilane coupling agent solution into a nano cesium tungsten bronze solution for stirring reaction to obtain modified cesium tungsten bronze; phosphorus trichloride, pentaerythritol and β-phenylethanol react in a first solvent to obtain a chlorine-containing cyclic phosphate flame retardant; S2, dispersing the chlorine-containing cyclic phosphate flame retardant in a second solvent, adding modified cesium tungsten bronze to react, and obtaining multifunctional cesium tungsten bronze; S3, granulating the multifunctional cesium tungsten bronze and polyester powder to obtain a multifunctional polyester masterbatch; S4, spinning the multifunctional polyester masterbatch and polyester chips to obtain a heat storage flame retardant polyester fiber based on modified cesium tungsten bronze, which has good heat storage performance and flame retardant performance, and less mechanical performance damage.

The invention discloses sec-ethyl phosphate as well as a preparation method and application thereof, and belongs to the technical field of synthesis of flame retardants. Tri (2-ethoxyl) isocyanurate, phosphorus oxychloride and an alcohol compound are used as raw materials, the cyan phosphate is prepared through three-step reaction of preparing phosphoryl chloride diester, refining the phosphoryl chloride diester and synthesizing the cyan phosphate, the molecular structure contains a phosphate group and a triazine ring conjugated structure, and a carbon source, a gas source and an acid source are integrated. The thermal decomposition temperature of the sec phosphate is greater than or equal to 320 DEG C, the UL94V-0 level flame retardant standard can be reached by adding 12%-15% of sec phosphate into a high polymer material, and the sec phosphate has the characteristics of high flame retardant efficiency, good compatibility, strong migration resistance, excellent thermal stability, environmental protection and low toxicity; the synthetic preparation method is stable in process, easy in condition control and high in product purity, can be widely applied to flame-retardant modification of high polymer materials such as polyvinyl chloride, polyurethane and epoxy resin, and has important industrial application value.

The invention relates to the field of flame-retardant substances, in particular to a polyimide-coated aluminum hypophosphite flame retardant as well as a preparation method and application thereof. The preparation method comprises the following steps: cutting polyimide by using a splitting machine, dipping the cut polyimide in liquid nitrogen for 1 min, and crushing the polyimide in an extrusion crusher; observing particles of the obtained powder to be planar by using a scanning electron microscope, wherein the average particle size is 10-20 microns; dissolving the polyimide resin powder in dimethylacetamide; dispersing aluminum hypophosphite in absolute ethyl alcohol, and adding an acetic acid aqueous solution to adjust the pH value to 6; adding the polyimide dimethyl acetyl solution into the aluminum hypophosphite absolute ethyl alcohol solution, raising the temperature to 60-80 DEG C, and stirring for 30-60 minutes; and carrying out spray drying on the solution to obtain the polyimide-coated aluminum hypophosphite flame retardant.

The invention discloses a high-flame-retardant anti-dripping exposed TPO waterproof roll material and a preparation method thereof, and relates to the technical field of high polymer materials. The waterproof roll material comprises the following raw materials: 30-40 parts of thermoplastic resin; 20 to 30 parts of a POE elastomer; 25 to 35 parts of a flame retardant; 5-10 parts of a filler; 1-5 parts of a lubricant; 0.5 to 2 parts of an antioxidant; and 5-10 parts of an anti-dripping auxiliary agent. The preparation method comprises the following steps: putting the thermoplastic resin, the POE elastomer, the filler, the lubricant, the antioxidant and the organic silicon anti-dripping aid into a high-speed kneading machine for mixing, and then feeding the mixture into a double-screw extruder for granulation to obtain the high-flame-retardant and anti-dripping TPO waterproof roll material. The waterproof roll material is safe to store, can be subjected to hot welding, is easy to process, is environment-friendly and can be recycled.

The present invention belongs to the technical field of flame-retardant fabrics, and relates to a method for preparing a highly efficient and durable flame-retardant nylon 6 fabric, specifically: after adding nylon 6 fabric to a finishing solution containing a reactive DOPO flame retardant, a polythiol compound, a photoinitiator and a solvent a, reacting for 2 to 3 hours at 20 to 30°C under UV light irradiation, a highly efficient and durable flame-retardant nylon 6 fabric is obtained; the limiting oxygen index of the highly efficient and durable flame-retardant nylon 6 fabric is higher than 29.8%, the damaged length is lower than 10.8 cm, no molten droplets are generated, and after 30 washes, the vertical combustion test can still be passed, the damaged length is lower than 14.1 cm, no molten droplets are generated, and the fabric has good flame retardant properties and water washability. The flame-retardant nylon 6 fabric prepared by the method of the present invention has a high limiting oxygen index, good flame retardant effect, no molten droplets are generated, and excellent water washability.

The invention discloses a halogen-free flame-retardant polyethylene core layer material for a decoration fireproof aluminum-plastic panel, and belongs to the technical field of building fireproof materials. The halogen-free flame-retardant polyethylene core layer material for the decoration fireproof aluminum-plastic panel is prepared from low-density polyethylene, high-density polyethylene, an ethylene-ethyl acrylate copolymer, modified sepiolite-loaded phytic acid, ethylene-octene copolymer coated expanded graphite, a modified hydroxide flame retardant, a modified nano hydrotalcite flame retardant and a lubricant polyethylene wax. According to the halogen-free flame-retardant polyethylene core layer material for the decoration fireproof aluminum-plastic panel, the tensile strength is 24.5 to 25.2 MPa, the elongation at break is 41.6 to 47.5 percent, the impact strength is 47.1 to 48.5 kJ / m < 2 >, the bending strength is 25.9 to 27.2 MPa, and the oxygen index is 40.4 to 41.1.

The application discloses a kind of homogeneous heat-insulating materials and preparation method thereof, belong to heat-insulating material technical field.The material of preparation includes: (1) the mixture of graphene oxide aqueous solution and metal salt, add sodium hydroxide or potassium hydroxide solution to obtain graphene oxide composite inorganic flame retardant solution;(2) to graphene oxide composite inorganic flame retardant solution join surface modifier, obtain the modified graphene oxide composite inorganic flame retardant of powdery;(3) 50-60 parts polyether polyol, 40-50 parts polyester polyol, 3-5 parts uniform foaming agent, 2-3 parts catalyst, 15-18 parts foaming agent, 80-100 parts modified expandable graphite, 160-220 parts modified graphene oxide composite inorganic flame retardant, 15-20 parts organic phosphorus flame retardant and 0.9-1.5 parts water are mixed to obtain mixed liquid;(4) 100-110 parts diisocyanate is added to mixed liquid, after stirring, pour into mould to carry out foaming and curing, i.e.get.The method process is simple, production cost is low and flame-retardant performance, heat-insulating performance, mechanical property and thermal stability are all higher.

The invention discloses an efficient flame-retardant normal-temperature curing epoxy resin composition and application thereof, and belongs to the technical field of flame-retardant adhesives. The epoxy resin composition comprises a component A and a component B. The component A comprises epoxy resin, a flame retardant, a diluent, a silane coupling agent, an antifoaming agent and a filler. The component B comprises a curing agent and a curing accelerator; the flame retardant comprises a main flame retardant and a liquid flame retardant. According to the epoxy resin composition provided by the invention, the phosphorus-containing epoxy resin and the liquid phosphate flame retardant are synergistically combined, so that the flame-retardant efficiency is improved, meanwhile, relatively high Tg can be maintained, the viscosity of a resin system is reduced, and the operability is improved. The epoxy resin composition can be applied to structural adhesives and potting materials in the fields of automobile parts, aviation parts, electronic components, transformers, small mutual inductors, sensors and the like, and also can be applied to epoxy resin coatings.

The invention discloses an epoxy resin composition containing a phosphorus-containing flame-retardant curing agent as well as a preparation method and application of the epoxy resin composition, and belongs to the technical field of preparation of flame-retardant epoxy resin compositions. The epoxy resin composition comprises the following components in parts by weight: 80-100 parts of an epoxy resin matrix, 10-30 parts of a phosphorus-containing flame-retardant curing agent, 6-60 parts of a curing agent, 0.1-0.3 part of an accelerant, 10-30 parts of a synergistic flame retardant, 40-60 parts of filler and the like. The phosphorus-containing flame-retardant curing agent is prepared from phenyl phosphoryl dichloride and a bisphenol compound through a polymerization reaction. The phosphorus-containing flame-retardant curing agent with phenolic hydroxyl reaction active groups is prepared by using low-cost phenylphosphoryl dichloride as a raw material and is matched with an existing flame-retardant system, so that the contradiction between the flame-retardant property and the physical property (mainly Tg) of an epoxy resin material is solved; and the flame retardant grade of V-0 and the higher glass transition temperature can be achieved when the addition amount of the flame retardant is lower.

This invention relates to the field of flame-retardant composite materials, specifically to flame-retardant composite materials based on the synergistic reinforcement of talc and graphene sheets and their applications. It addresses the problem that existing polymer materials struggle to simultaneously achieve reinforcement, flame retardancy, and lightweighting, and require large quantities of high-performance additives. The process involves first mixing talc sheets, graphene, a composite flame retardant, and a dispersant in a high-speed mixer, then cooling to room temperature to obtain a premix. A polymer matrix is ​​then added to a twin-screw extruder. The premix and other auxiliary additives are added through a side feed port, melt-blended, water-cooled, air-dried, and pelletized to obtain composite material particles. These particles are then vacuum-dried and injection-molded to obtain the flame-retardant composite material. The flame-retardant composite material possesses excellent flame-retardant and mechanical properties, exhibiting outstanding overall performance and being more suitable for industrial production.

The application discloses a phosphorus-nitrogen flame retardant, a magnesium hydroxide hybrid flame retardant material and a preparation method and application thereof. The application firstly provides a novel structure phosphorus-nitrogen flame retardant, and then the phosphorus-nitrogen flame retardant is mixed with a magnesium hydroxide flame retardant to form a magnesium hydroxide hybrid flame retardant material. Based on a combination chemical synthesis method, the functional groups of the organic flame retardant containing phosphorus and nitrogen with high flame retardance are selectively synthesized with the environmentally-friendly magnesium hydroxide flame retardant with high thermal stability and low dielectric characteristics, so that the environmentally-friendly magnesium hydroxide hybrid functional material containing the halogen-free magnesium hydroxide containing phosphorus and nitrogen is obtained. The hybrid functional material is applied to an epoxy resin material, the flame retardant efficiency of the magnesium hydroxide is efficiently improved, the influence of the magnesium hydroxide on the mechanical performance of the epoxy resin is reduced, and the epoxy resin can simultaneously meet the high flame retardant performance and the high mechanical performance under the condition of low addition amount.

The invention relates to a marine spraying rigid foam polyurethane material which is composed of a component A and a component B. The component A comprises the following raw materials in parts by weight: 60-88 parts of polymer polyol, 2-3 parts of a chain extender, 4-7 parts of a flame retardant, 0.5-0.9 part of a foam stabilizer, 0.6-0.9 part of a catalyst and 1-1.5 parts of a silane end-capping agent. And the component B is polyphenyl methane polyisocyanate. Compared with the prior art, the modified polymer polyol, the siloxane modified epoxy resin and the optimized flame retardant are adopted, so that the water resistance, the mechanical property, the flame retardant efficiency and the like of the product are improved.