179 results about "Intumescent" patented technology

The invention provides a light super-soft fire-resistant flame-retardant optical cable and a preparation method thereof. The light super-soft fire-resistant flame-retardant optical cable sequentially comprises a high-temperature-resistant optical fiber, a filling layer, a flame-retardant loose tube, a reinforcing layer, a heat insulation layer and a fire-resistant flame-retardant layer from inside to outside, the fireproof flame-retardant layer comprises the following preparation raw materials in percentage by mass: 55-65% of plasma activated mineral powder, 25-35% of a thermoplastic elastomer base material subjected to irradiation crosslinking treatment, 8-12% of a phosphorus-nitrogen intumescent flame retardant and 1.5-2.5% of a silane coupling agent; the nano mineral powder comprises a magnesium aluminum silicate compound, and the thermoplastic elastomer matrix comprises a blend of SEBS (Styrene-Ethylene-Butylene-Styrene) and TPU (Thermoplastic Polyurethane). The fire-resistant flame-retardant layer forms a ceramic protection layer at high temperature to perform fire-resistant flame-retardant protection and prevent heat transfer, and meanwhile, the heat insulation layer is matched to further prevent heat from being transferred to the cable core, so that the performance of the optical cable is ensured not to be influenced.

The invention provides a phase change enhanced ablation-resistant modified liquid silicone rubber material as well as a preparation method and application thereof, and belongs to the field of advanced materials. According to the invention, paraffin is adopted as a phase change filler, so that the ablation resistance and heat insulation performance of the expanded ceramic liquid silicone rubber material are remarkably improved, and the prepared silicone rubber composite material has the advantages of low density, low ablation surface temperature, strong carbon layer and high heat absorption capacity. The phase-change reinforced modified expanded ceramic flexible ablation-resistant material further improves the ablation resistance and high-temperature heat insulation performance of a liquid silicone rubber material, and has a good application prospect in the fields of aerospace thermal protection, building heat insulation and the like.

The invention discloses a halogen-free compound flame retardant and application thereof in an antistatic nylon 66 composite material, and belongs to the technical field of polymer composite materials. The halogen-free compound flame retardant is prepared by compounding 68 parts of an organic aluminum hypophosphite flame retardant, 20 parts of a nitrogen-phosphorus intumescent flame retardant, 10 parts of a two-dimensional layered inorganic substance and 2 parts of a coupling agent through a high-speed mixing and drying process. The halogen-free compound flame retardant is blended with nylon 66, reinforced fibers, an antioxidant and the like, and the composite material is prepared through melt extrusion. According to the compound system, the total dosage of the flame retardant is remarkably reduced, the V-0 flame retardant grade is still achieved under the condition that the thickness is 0.8 mm, and the limit oxygen index exceeds 32%. The composite material has excellent flame retardancy and antistatic property while maintaining good mechanical properties, is suitable for a high glass fiber content system, effectively solves the problems of high flame retardant addition amount, difficult processing, high cost and the like in the prior art, and has the advantages of simple process and excellent comprehensive performance.

The application provides a kind of fire-retardant heat-conducting polyacrylic acid fireproof paint and its preparation method, according to mass fraction includes the following raw materials: methyl methacrylate 3-24 parts, butyl acrylate 3-30 parts, acrylic acid 0.5-9 parts, intumescent monomer 2-15 parts, modified ceramic material 0.6-10 parts, composite emulsifier 0.6-3 parts, buffer 0.8-1.8 parts and initiator 0.2-1.5 parts;Intumescent monomer is obtained by the reaction of bio-based material, methyl methacrylate phosphate and melamine;The modified ceramic material is the ceramic material modified by silane coupling agent.The fire-retardant heat-conducting polyacrylic acid fireproof paint of the application has the advantages of simple formula, no environmental pollution, low toxicity, low VOC content, no irritating odor, etc.;High efficiency of flame retardancy, can quickly generate high-quality intumescent carbon layer after fire.

The invention relates to the technical field of high polymer materials, and particularly discloses a B1-grade low-smoke halogen-free flame-retardant polyethylene cable material and an extrusion molding process thereof. The invention discloses a B1-grade low-smoke halogen-free flame-retardant polyethylene cable material. The cable material is prepared from the following raw material components in parts by weight: 50 to 70 parts of linear low-density polyethylene, 50 to 70 parts of ethylene-vinyl acetate copolymer, 40 to 60 parts of nanoscale magnesium hydroxide, 5 to 8 parts of microencapsulated red phosphorus, 10 to 15 parts of intumescent flame retardant, 3 to 5 parts of zinc borate and 2 to 4 parts of carbon nanotubes. According to the cable material, the ethylene-vinyl acetate copolymer can improve the dispersing performance of the inorganic filler, the composite flame retardant composed of the nanoscale magnesium hydroxide, the microencapsulated red phosphorus and the intumescent flame retardant is utilized, and the synergistic effect of the zinc borate and the carbon nanotubes is matched, so that the obtained cable material has better flame retardance, and the release of smoke is less.

The invention relates to the technical field of materials, and discloses a high-flame-retardancy low-smoke halogen-free cable sheath material and a preparation method thereof.The cable sheath material is prepared by taking a polyvinyl base material as a main raw material and taking a flexibilizer, a flame retardant and the like as auxiliary materials through mixing and extrusion processes; wherein the flame retardant is prepared by cross-linking galactomannan by using a triazine derivative containing a phosphorus flame-retardant element in the structure as a cross-linking agent, the galactomannan can be used as a carbon source, a triazine ring can be used as a nitrogen source, and the phosphorus flame retardant can be used as an acid source, so that a three-element integrated intumescent flame-retardant system can be formed, and the flame-retardant effect is good when combustion occurs. An expanded carbon layer can be rapidly formed on the surface of the sheath material, the expanded carbon layer can effectively isolate oxygen, heat and a fire source, then the flame retardant property of the sheath material is effectively improved, the aerogel structure has rich pores, smoke formed by combustion can be effectively absorbed, and the flame retardant property of the sheath material is improved. Therefore, low-smoke halogen-free modification of polyethylene is realized.

The invention belongs to the technical field of fireproof coatings, and particularly relates to a steel structure fireproof powder coating which comprises the following components in parts by weight: 40-60 parts of epoxy polyester resin, 20-35 parts of a composite intumescent flame-retardant system, 5-15 parts of a flame-retardant aid, 5-15 parts of functional filler, 0.5-2 parts of a flatting agent, 0.2-1 part of a defoaming agent and 5-10 parts of a curing agent, wherein the epoxy polyester resin comprises epoxy resin and polyester resin, and the composite intumescent flame-retardant system comprises an acid source, a gas source and a carbon source. According to the fireproof powder coating for the steel structure, the epoxy polyester resin is used as a base material, the composite intumescent flame-retardant system, the flame-retardant additive, the functional filler and the like are combined, and all the components have a synergistic effect, so that the coating has excellent fireproof heat-insulating performance and flame-retardant effect. When a fire disaster occurs, the composite intumescent flame-retardant system can rapidly expand to form a fluffy heat-insulating carbon foam layer, heat and oxygen are effectively isolated, and flame spreading is prevented; the flame-retardant auxiliary agent further enhances the flame-retardant effect through decomposition heat absorption and oxygen concentration dilution.

The invention relates to a low-smoke flame-retardant ethylene propylene diene monomer composite material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The composite material comprises the following components: 100 parts of raw ethylene propylene diene monomer rubber, 5-8 parts of a cycloolefin copolymer, 20-25 parts of a modified aluminum hydroxide-magnesium hydroxide flame retardant, 15-20 parts of a phosphorus-nitrogen intumescent flame retardant, 2-5 parts of a melamine modified graphene-layered bimetal hydroxide composite flame retardant and 3-10 parts of a vulcanization system, the vulcanization system comprises 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of an accelerant, 0.5-1.5 parts of sulfur and 1-5 parts of a processing aid. According to the invention, the raw rubber of the ethylene propylene diene monomer is compounded with a small amount of cycloolefin copolymer, so that the smoke formation tendency is reduced from the matrix level, and a ternary synergistic flame-retardant system consisting of the inorganic flame retardant, the phosphorus-nitrogen intumescent flame retardant and the nano composite flame retardant is matched, so that the composite material keeps good mechanical properties at the same time.

The invention provides a composite intumescent flame retardant modified polyamide composite material and a preparation method thereof. The flame-retardant nylon 66 and / or nylon 6 composite material is prepared from the following components in parts by weight: 75-85 parts of nylon 66 and / or nylon 6 matrix and 15-25 parts of composite intumescent flame retardant, wherein the composite intumescent flame retardant is prepared from the following components in parts by weight: 30-50 parts of a phytic acid derivative; 20 to 40 parts of melamine pyrophosphate (MPP); 5 to 15 parts of modified nanosheets; and 10-20 parts of a hydrogen bond cross-linking agent. According to the composite intumescent flame retardant modified polyamide composite material disclosed by the invention, the limit oxygen index and the fireproof grade can be remarkably improved under the condition that the addition amount of the composite intumescent flame retardant is low, and the mechanical property of the polyamide material is not influenced.

The invention discloses a nitrogen-phosphorus intumescent flame retardant based on a hypophosphorous acid derivative and oligomerization Schiff base as well as a preparation method and application thereof, and relates to the technical field of macromolecular flame-retardant materials. The invention discloses a nitrogen-phosphorus intumescent flame retardant based on a hypophosphorous acid derivative and oligomeric Schiff base. The nitrogen-phosphorus intumescent flame retardant has a structure as shown in a general formula (I), wherein the Schiff base chain segment is an oligomerization Schiff base chain segment formed by condensation of aromatic polyamine and aromatic polyaldehyde and has a linear or hyperbranched structure, m, n and x are positive integers larger than 0, m + n is larger than or equal to 2 and smaller than or equal to 8, and x is larger than or equal to 2 and smaller than or equal to 30. According to the flame retardant provided by the invention, an oligomer structure and an introduced benzene ring structure have good compatibility with a polymer matrix and are not easy to migrate and separate out, so that long-acting flame retardance and mechanical properties of a material can be maintained, expensive DOPO is successfully replaced by hypophosphorous acid which is low in cost and easy to obtain, and a solid foundation is laid for large-scale industrial popularization and application.

The invention discloses a preparation method of a water-resistant and melting-resistant sodium silicate-based fireproof coating, and belongs to the technical field of preparation of fireproof materials and inorganic-organic hybrid coatings. The method comprises the following steps: (1) reacting isophorone diisocyanate with polypropylene glycol to prepare an isocyanate-terminated polyurethane prepolymer; (2) mixing the polyurethane prepolymer with piperazine pyrophosphate to obtain a component A; (3) mixing a sodium silicate aqueous solution with melamine to obtain a component B; and (4) mixing and curing the component A and the component B in proportion to obtain the coating. According to the invention, an isocyanate group in a polyurethane prepolymer and a sodium silicate aqueous solution are subjected to an in-situ chemical reaction, an organic hydrophobic network is constructed on the surface of an inorganic phase, and the water resistance of the coating is remarkably improved. Meanwhile, piperazine pyrophosphate and melamine form an intumescent flame-retardant system, the intumescent flame-retardant system and sodium silicate are synergistically promoted to form a compact and stable intumescent layer at high temperature, and the problems that a traditional water glass coating easily absorbs moisture and melts and flows at high temperature are effectively solved. The method is simple and controllable in process, and the prepared coating has excellent water resistance, fire resistance and heat insulation performance.

The invention provides a water-based single-component modified epoxy intumescent fireproof coating, which is prepared from the following substances in percentage by mass: 13 to 17 percent of deionized water, 1 to 3 percent of polyamide wax slurry, 0.5 to 2 percent of dispersing agent, 0.2 to 0.4 percent of defoaming agent, 7 to 9 percent of titanium dioxide, 3 to 5 percent of filler, 22 to 26 percent of flame-retardant catalyst, 8 to 10 percent of charring agent, 10 to 14 percent of foaming agent and 20 to 24 percent of modified epoxy resin. And 0.1-0.2% of a bactericide. Due to the water-based formula, VOC is basically not released, so that compared with an intumescent epoxy fireproof coating in the prior art, the intumescent epoxy fireproof coating is excellent in environment-friendly performance.

The invention discloses an alcohol-based phosphorus-boron-nitrogen intumescent flame retardant as well as a preparation method and application thereof. The preparation method comprises the following specific preparation processes: carrying out reaction on glycerol and phosphoric acid in a reaction container additionally provided with a water segregator at 100-115 DEG C to prepare glycerol triphosphate; the preparation method comprises the following steps: adding boric acid into a glycerol triphosphate reaction container, and reacting at 100-115 DEG C to obtain glycerol triphosphate boric acid ester; and adding urea into a reaction container of glycerol triphosphate boric acid ester, and reacting at 110-135 DEG C to obtain the alcohol-based phosphorus-boron-nitrogen intumescent flame retardant. The limit oxygen index (LOI) of the cotton fabric finished in the flame retardant finishing liquid with the flame retardant concentration of 200g / L can reach 52%, and the flame retardant grade is gt; 42, the flame retardant property is good. The synthesis process is simple, the raw materials are green, environment-friendly, cheap and easily available, the production process is simple, large-scale production can be realized, and secondary pollution is avoided.

The invention discloses a boron-phosphorus synergistic starch-based single-component intumescent flame retardant as well as a preparation method and application thereof. Starch, phytic acid, boric acid, allantoin and the like are used as raw materials, and the boron-phosphorus synergistic starch-based single-component intumescent flame retardant integrating an acid source, a carbon source and a gas source is designed and prepared. The flame retardant provided by the invention is simple and convenient in preparation process and high in safety, most of the raw materials of the flame retardant are derived from green renewable biomass materials with low cost, and the flame retardant has environment-friendly characteristic and excellent polymer compatibility. The synergistic effect of the phytic acid boron component in a flame-retardant system can be fully exerted by regulating and controlling the ratio of boron to phosphorus, when the flame retardant is applied to a polylactic acid (PLA) material, the influence on the mechanical property of the PLA is small, the PLA can be endowed with excellent flame retardance, the molten drop phenomenon and a large amount of dense smoke in the combustion process of the PLA can be effectively inhibited, and the biodegradation speed of the PLA can be increased.

The present application relates to a kind of self-sealing coating, self-sealing coating and its preparation method and application, belong to functional coating technical field.Self-sealing coating includes healing coating and intumescent coating;The preparation material of healing coating includes: A liquid, raw material includes polyester polyol 40-80 parts, isocyanate 20-60 parts;B liquid, raw material includes polyether amine 40-70 parts, chain extender 10-20 parts, flame retardant 10-25 parts;The preparation material of intumescent coating includes: C liquid, raw material includes polyether polyol 50-80 parts, isocyanate 20-50 parts;D liquid, raw material includes polyether polyol 70-80 parts;E liquid includes fatty acid ester 40-70 parts, acrylate 20-48 parts.A liquid is mixed with B liquid to make coating have good extensibility and resilience;C liquid, D liquid and E liquid are mixed to have oil absorption intumescent capacity.Application is used to the protection of oil product storage device such as gasoline, diesel, kerosene etc..

A fire-retardant coating is characterized by comprising the following components in weight percentage: 10-30% vinyl acetate-ethylene copolymer (VAE) emulsion, 10-30% modified urea-formaldehyde resin, 5-20% expandable vermiculite, 10-30% coating additives and other fillers, 10-30% intumescent flame retardant, and 5-30% water; wherein the modified urea-formaldehyde resin is obtained by chemically coating melamine-modified urea-formaldehyde resin with polyacrylate. This fire-retardant coating not only exhibits good expansion properties and excellent fire resistance, but also possesses good water resistance.

The invention relates to an intumescent flame retardant as well as a preparation method and application thereof, and belongs to the technical field of flame-retardant materials. The method comprises the following steps: reacting phosphoric acid with pentaerythritol under a first reaction condition to prepare an intermediate; and adding cyanuric chloride or a derivative thereof into an organic solvent in the presence of alkali, then adding the prepared intermediate, and reacting under a second reaction condition to prepare the target product intumescent flame retardant. Through precise molecular design and step-by-step chemical synthesis, three components, namely an acid source, a carbon source and a gas source, which are physically mixed and have independent functions in a traditional intumescent flame retardant system are integrated into a single molecular structure, so that the prepared intumescent flame retardant is stable and reliable in flame retardant property, the hydrolysis resistance and durability of the flame retardant are remarkably improved, and the flame retardant has good application prospects. The requirements on efficient, lasting and stable flame retardants are met.

The invention discloses a carbon fiber flame-retardant composite plastic and a preparation method thereof, and belongs to the technical field of composite plastic preparation, the carbon fiber flame-retardant composite plastic comprises: 50-80% of a polymer matrix, the polymer matrix is a mixture of a main resin and a flexibilizer, the main resin is at least one of polyamide 6, polyamide 66, polybutylene terephthalate or polycarbonate, and the flexibilizer is at least one of a flexibilizer and an antioxidant. The flexibilizer is a maleic anhydride grafted polyolefin elastomer, and the content of the flexibilizer accounts for 5-15% of the total mass of the polymer matrix; and 15%-40% of surface modified carbon fibers. A synergistic modification layer of a nitrogen-phosphorus intumescent flame retardant and a two-dimensional nano material is constructed on the surface of the carbon fiber through a chemical grafting technology, nano-scale dispersion and firm loading of flame-retardant components are achieved, the composite material can rapidly form a compact and stable intumescent carbon layer during combustion, the limit oxygen index is increased and passes the UL-94V-0 grade, and the flame-retardant performance of the composite material is improved. The problems of low flame retardant efficiency and poor durability caused by non-uniform dispersion and easy migration of a traditional physical blending flame retardant are solved.

The application provides a preparation method of an intumescent pressure-resistant material and the intumescent pressure-resistant material prepared therefrom, and comprises the following steps: S1, preparation of a first mixture: mixing a thermosetting resin with a first curing agent to obtain the first mixture; S2, preparation of a second mixture: mixing a second curing agent with water to obtain the second mixture; S3, preparation of a third mixture: uniformly mixing the first mixture with the second mixture, adding a promoter and a foaming agent, adjusting the rotating speed to 700 rpm-3000 rpm under the conditions of 60 DEG C-85 DEG C and 0.3-3 MPa, and stirring for greater than or equal to 10 min to obtain the third mixture; and S4, curing: allowing the third mixture to be cured under the condition of 0.3-3 MPa to obtain the intumescent pressure-resistant material. In the application, steps S3 and S4 are carried out under high pressure, and the intumescent pressure-resistant material prepared has a higher intumescent temperature, a higher high-temperature mechanical strength, and a stronger sealing ability of functional water.

The invention provides a graphite-grade expandable polystyrene bead body and a preparation process thereof, and belongs to the technical field of expandable polystyrene, the preparation process comprises the following steps: S1, injecting 150-230 parts by weight of deionized water into a reaction kettle, adding 0.5-1 part by weight of a dispersion stabilizer, stirring, and cooling to room temperature to obtain a graphite-grade expandable polystyrene bead body; adding 100 parts of styrene, 3.3-3.8 parts of intercalation-modified double-modified graphite, 0.3-0.35 part of an initiator and 0.9-1.1 parts of a phosphorus-nitrogen intumescent flame retardant, continuously stirring, heating to 86-90 DEG C, and keeping the temperature for 7-9 hours to obtain a particle dispersion phase; s2, adding 5.6-6.2 parts of a foaming agent into the particle dispersion phase, heating to 120 DEG C, continuously reacting for 4.5-5.5 hours, cooling, discharging, cleaning and filtering to obtain graphite-grade expandable polystyrene beads; the intercalation-modified double modified graphite is prepared by carrying out surface modification on oxidized intercalated graphite through poly (1, 3-propanediol succinate). According to the invention, excellent thermal stability of the prepared product is ensured, and the flame retardance of the product is improved.

The utility model relates to the technical field of corrugated cartons, and discloses a novel composite fireproof flame-retardant corrugated carton which comprises a carton body, a sealing plate is mounted on the upper side of the carton body, a mounting groove is formed in the inner wall of the carton body, a mounting block is slidably mounted on the inner wall of the mounting groove, and a lining plate is fixedly connected to the outer side of the mounting block. The surface of the inner lining plate is coated with an environment-friendly intumescent flame retardant, reinforcing ribs are arranged in the inner lining plate, the outer corrugated layer is arranged on the outer side of the carton body and the outer side of the sealing plate, and the middle corrugated layer is arranged between the outer corrugated layer and the inner lining plate. Through cooperative arrangement of the mounting groove, the mounting block, the inner lining plate, the supporting plate, the environment-friendly intumescent flame retardant, the reinforcing ribs, the outer corrugated layer, the honeycomb layer, the flame-retardant coating, the middle corrugated layer, the flame-retardant fiber interlayer and the waterproof layer, the flame retardance and strength of the carton are effectively improved, and a packaged product can be better protected.

The invention discloses an organic phosphine intumescent flame retardant as well as a synthesis method and application thereof. The molecular structural formula of the organic phosphine intumescent flame retardant is as shown in formula (I): in the formula (I), R1 represents C1-C4 alkyl or phenyl; r2 represents an alkyl group of C1-C6 or an alcohol amine of C2-C4; and n is 10 to 100. The organic phosphine intumescent flame retardant provided by the invention can be used for preparing a polymer-based continuous carbon fiber composite material by a pultrusion process so as to solve the problem that flame retardance is difficult or the mechanical property is greatly reduced after flame retardance.

The invention discloses adhesive glue for a formaldehyde-free flame-retardant plate and a preparation method of the adhesive glue, and relates to the technical field of adhesive materials, the adhesive glue for the formaldehyde-free flame-retardant plate comprises the following components in parts by mass: matrix resin: 45-75 parts of acrylate modified soybean protein glue; a flame-retardant system: 10-30 parts of a phosphorus-nitrogen intumescent flame retardant, which is composed of ammonium polyphosphate, pentaerythritol and melamine; 5-12 parts of nano metal hydroxide selected from magnesium hydroxide or aluminum hydroxide; the preparation method comprises the following steps: S1, mixing soybean protein powder and deionized water according to a mass ratio of 1: 5-1: 8, heating to 50-60 DEG C, dissolving, adding an acrylate monomer and potassium persulfate accounting for 0.5-1.5% of the mass of the monomer, reacting for 1.5-2.5 hours under the protection of nitrogen, and filtering to obtain a filtrate; the prepared modified soybean protein glue is formaldehyde-free, environment-friendly, high in flame-retardant efficiency and excellent in bonding performance.

The invention belongs to the technical field of coatings, and particularly relates to a high-flame-retardance cable fireproof coating and a preparation method thereof.The high-flame-retardance cable fireproof coating is formed by mixing water-based acrylate emulsion serving as a film-forming substance and synergistic expansion flame-retardant materials and the like serving as additives. Wherein the synergistic intumescent flame retardant is prepared by coating the surface of serpentine with a curdlan intumescent flame retardant with a cross-linked structure, the existence of serpentine can improve the mechanical property of the coating, in addition, in the curdlan structure with the cross-linked structure, curdlan is used as a carbon source, and a cross-linked modifier structure contains a gas source and an acid source, so that the synergistic intumescent flame retardant is prepared. Therefore, the flame retardant has the effect of a three-element integrated intumescent flame retardant, an intumescent carbon layer can be quickly formed during combustion to prevent continuous combustion, and meanwhile, the uniformly dispersed serpentine can achieve a physical barrier effect and is cooperated with the carbon layer, so that the effect of greatly enhancing the flame retardant property of a coating can be achieved by adding a small amount of the serpentine.

Disclosed are products having a coating applied to at least a portion thereof. The products can be vehicle products, home or office appliances, furniture or tooling, power industry products, consumer electronics, construction products, or products protected by an intumescent coating. The coating can be derived from a waterborne coating composition or a powder coating composition and can include an acrylic polyester resin obtainable by grafting an acrylic polymer with a polyester material obtainable by polymerizing a polyacid component with a polyol component comprising 2,2,4,4-tetraalkylcyclobutane-1,3-diol. Also disclosed are methods of application and uses.

The utility model relates to the technical field of fireproof emergency doors, in particular to a double-faced heat insulation fireproof emergency door which comprises a door frame body. The outer side of the door frame body is fixedly connected with an outer frame, the inner side of the outer frame is slidably connected with a mounting frame used for bearing the inorganic intumescent flame retardant, the upper end and the lower end of the outer frame are both slidably connected with supporting blocks, the outer sides of the supporting blocks are fixedly connected with fixing rods, and the inner side of the door frame body is fixedly connected with the mounting frame; positioning holes are formed in the upper and lower ends of the mounting frame; a first magnesium oxide heat insulation plate for heat insulation and fire prevention is arranged on the inner side of the mounting frame; according to the emergency door, the door frame body is installed at the position of a partition through the outer frame, the first magnesium oxide heat insulation plate is installed through the installation frame and the butt joint rod, and when the emergency door is in a fire disaster, an inorganic intumescent flame retardant in the installation frame is heated to react, so that the inorganic intumescent flame retardant foams and expands to fill gaps to insulate heat and prevent fire; the rotating plate and the first magnesium oxide heat insulation plate are used for isolating a fire scene, so that two sides of the emergency door are insulated and fireproof.

The application discloses a boron-phosphorus synergistic chitosan-based single-component intumescent flame retardant, a preparation method thereof and application of the chitosan-based single-component intumescent flame retardant in rigid polyurethane foam. The chitosan-based single-component intumescent flame retardant is prepared by using chitosan, self-made boron phosphate and melamine as raw materials, through ion exchange reaction and esterification reaction combination, and by adopting a one-pot method, and the chitosan-based single-component intumescent flame retardant is a boron-containing chitosan-based single-component intumescent flame retardant integrating an acid source (boron phosphate), a carbon source (chitosan) and a gas source (melamine). The synthesis of the flame retardant is completed in an aqueous phase, the preparation process is simple, raw material sources are extensive, the flame retardant has good thermal stability and good compatibility with RPUF, and the flame-retarding synergistic effect between B and P can be fully exerted by adjusting the boron-phosphorus ratio, the flame-retarding efficiency is greatly improved, and therefore the chitosan-based single-component intumescent flame retardant has a wide application prospect in flame-retarding RPUF.

The invention discloses a material, a preparation method thereof and a household appliance, and belongs to the field of composite materials. The material is a single-molecule core-shell intumescent flame retardant taking hollow glass beads as a core and a covalent organic framework as a shell; the covalent organic framework is obtained by in-situ synthesis of covalent organic framework monomers on the surfaces of the hollow glass beads. The flame retardant is applied to the aspect of wiring outer cover materials of household appliances, solves the problems of short flame-retardant duration and poor flame-retardant effect of the existing flame retardant, and has the characteristics of stable structure, capability of continuously playing a flame-retardant role and good flame-retardant effect.

A solvent-borne intumescent coating composition comprising: a) at least 5.0 wt% relative to the total weight of the intumescent coating composition of a polyvinyl ester-based binder and / or a (meth)acrylic-based binder; b) an acid-generating agent; c) a carbon donor d) at least 4.0 wt% relative to the total weight of the intumescent coating composition of dicyandiamide; wherein the weight ratio of components b):c) is in the range of 2:1 to 4:1.