2120 results about "Ammonium polyphosphate" patented technology

A flame retardant thermoplastic composition comprises: a poly(arylene ether); an impact modifier; a polyolefin; a phosphoric acid salt selected from the group consisting of melamine phosphate, melamine pyrophosphate, melamine orthophosphate, diammonium phosphate, monoammonium phosphate, phosphoric acid amide, melamine polyphosphate, ammonium polyphosphate, polyphosphoric acid amide, and combinations of two or more of the foregoing; a metal hydroxide; and an organic phosphate wherein the amount of phosphoric acid salt by weight is greater than or equal to the amount of organic phosphate by weight. The flame retardant composition is may be used in the production of electrical wires.

Provided is a waterborne ultra-thin steel structure fire retardant coating and a preparation method thereof. The raw material ratio of the coating includes 15-50% by weight of polymer latex, 15-30% by weight of ammonium polyphosphate, 5-15% by weight of pentaerythritol, 3-10% by weight of cyanurtriamide, 5-12% by weight of titanium dioxide, 2-13% inorganic filler, 0-5% by weight of expansiveness graphite, 1-10% by weight of plasticizer, 0.4-1.5% by weight of wetting dispersant, 0.2-0.5% by weight of defoamer, 1-6% by weight of coalescing agents and 5-15% by weight of water, and total raw material ratio is 100%. A high-speed dispersion method or a grinding dispersion method is adopted in preparation of the coating. A coating layer of the fire retardant coating can form a carbonization layer which is good in foaming effect, small and uniform in air holes and high in expansion times when in heating. The final fire retardant performance of the coating is far higher than technical requirements of a national standard. The waterborne ultra-thin steel structure fire retardant coating is a waterborne coating product, is non-poisonous and odorless and environment-friendly, and can be coated in a mode of brushing or spraying or roller coating.

The invention relates to an aqueous ultra-thin expansion type steel structure fire-proof anti-corrosive paint and a preparation method thereof. The fire-proof anti-corrosive paint is prepared by adding ammonium polyphosphate, pentaerythritol, melamine, titanium white, expandable graphite, a preservative, a ceramic filler, an antifoaming agent, a dispersing agent, a plasticizer and the like into organic silicon-modified acrylic resin emulsion serving as a film forming base material. The paint has the advantages of high fire-proof performance, anti-corrosion and anti-rust function, and high water resistance, acid-alkali resistance and corrosion resistance, capability of meeting the requirements of various steel structures on the fire-proof and anti-corrosion performance, environmental friendliness, low cost, and readily available raw materials, so the paint can be widely applied to fire-proof protection of various steel structures.

A flame retardant thermoplastic composition comprising a poly(arylene ether), a block copolymer, a liquid polyolefin, and a flame retardant additive composition. The flame retardant additive composition comprises a metal hydroxide, an organic phosphate, and a phosphoric acid salt selected from the group consisting of melamine phosphate, melamine pyrophosphate, melamine orthophosphate, melem polyphosphate, melam polyphosphate, diammonium phosphate, monoammonium phosphate, phosphoric acid amide, melamine polyphosphate, ammonium polyphosphate, polyphosphoric acid amide, and combinations of two or more of the foregoing. The block copolymer comprises a block that is a controlled distribution copolymer having terminal regions that are rich in alkylene units and a center region that is rich in aryl alkylene units. The flame retardant composition may be used in the production of covered conductors.

The invention discloses an anti-mildew halogen-free flame-retardant smoke-suppression wood-plastic composite material, which comprises the following components in parts by mass: 25-70 parts of plastic resin, 10-50 parts of plant fiber powder, 5-10 parts of camphor wood powder, 0.5-20 parts of a compatibilizer, 0-15 parts of a toughening agent, 10-35 parts of a flame retardant and a synergist, 2-5 parts of a thermal stabilizer, 0-1 part of an antioxidant and 1-4 parts of a lubricating agent. According to a method for preparing the wood-plastic composite material with a two-step fusion method disclosed by the invention, the interfacial compatibility can be improved effectively, and the flame retardance of the wood-plastic composite material is enhanced on the premise of keeping high mechanical property; and moreover, the using amount of ammonium polyphosphate serving as a major flame retardant is reduced. Compared with the conventional wood-plastic composite material, the wood-plastic composite material disclosed by the invention has a simple production flow, has the technical effects of flame retardance, smoke suppression and mildew resistance, and is widely applied to occasions such as indoor and outdoor architectural decoration, and the like.

The invention discloses a method for producing a flame-retardant veneer plywood, which comprises the following steps: placing wood veneers into a flame retardant aqueous solution to perform dipping treatment, applying the mixed adhesive to the upper surfaces and the lower surfaces of the veneers after the veneers are dried, assembling the veneers into a plate blank according to the principle that odd layers are crossed and symmetrical with even layers, and then performing the processes of cold pressing, hot pressing, cutting edge, sanding, surface treating and the like to obtain the flame-retardant veneer plywood product the thickness of which is between 2.7 and 20 millimeters. The flame retardant in the method is a mixture of low ammonium polyphosphate, ammonium phosphate, ammonium pyrophosphate, urea phosphate, boric acid and pentaerythritol, and the mixed adhesive is a uniform mixture of wood adhesive, filler, and a curing agent. The flame-retardant decorative veneer plywood prepared by the method has the advantages of excellent flame-retardant and fireproof performance, environmental prevention performance, and good mechanical properties.

The present invention provides a water environment-protecting superthin expanded type steel structure fire-retardant coating. Said fire-retardant coating uses water as dispersion medium, uses flake expandable graphite as expansion reinforcing material, uses one or several kinds of emulsions of acrylic emulsion and others as film-forming material, and its expansion system adopts the ingredients of polyammonium phosphate, pentaerythritol and tripolycyanamide. Said invention also provides its preparation method and concrete steps.

The invention relates to a fireproof coating. The fireproof coating is composed of, by weight, 15-25 parts of dicyandiamide, 15-30 parts of silicate, 10-18 parts of pentaerythritol, 8-15 parts of titanium dioxide, 7-10 parts of chlorcosane, 6-8 parts of ammonium polyphosphate, 15-20 parts of acrylic emulsion and the balance auxiliaries. The fireproof coating is free of poison and irritation; when the surface of steel is coated with the fireproof coating, the caking property is good and the coated steel is attractive and good in flame retardant efficiency.

The invention discloses a radiation cross-linked low-smoke halogen-free red phosphorus-free flame retardant material, which comprises the following components of: by weight, 10-80 parts of ethene-vinyl acetate copolymer, 5-30 parts of ethylene-octene copolymer and/or ethene-butene copolymer and/or terpolymer EP rubber, 0-100 parts of polyethylene, 1-20 parts of a polymer compatilizer, 0.5-10 parts of organosilicon polymer, 1-10 parts of a composite anti-oxidant, 0-200 parts of aluminium hydroxide and/or magnesium hydroxide and/or modified aluminium hydroxide and/or modified magnesium hydroxide, 0.1-100 parts of high molecular weight ammonium polyphosphate and/or 0.1-50 parts of a phosphate ester fire retardant and/or 0.1-50 parts of MCA. The material provided by the invention reaches American UL224VW-1 standard when applied in thermal shrinkable tubes, reaches American UL1581VW-1 standard when applied in electric wires and cables, contains no halogen or red phosphorus, and is environmentally friendly.

The present invention relates to a water thin expanding steel structure fire-resisting coating material and its preparation method. Said ivnention adopts a self-synthesized high melting temp. acrylate emulsion as main film-forming substance, adding proper quantity of chlorometaemulsion to raise fibre resistance of film-forming substance self-body, and on the basis of convertional ammonium polyphosphate fire-resistant adjuvant an expandable graphite as foaming material is added so as to form the invented fire-resisting coating material. Said invention can greatly raise forming rate to coating layer, the thickness of foamed layer can be up to 30-50 times that of original coating layer, and its fire-resisting limit can be up to 75 min (thickness of coating layer is 3 mm).

The invention is environmental-friendly waterborne nanometer fireproof flame-retardant coating and the preparation method, which belong to the fireproof flame-retardant coating manufacturing industry. The flame-retardant coating is obtained through the compounding of two types of flame-retardant agents, waterborne resin, ammonium polyphosphate, melamine, carbon-forming agent, nanometer pigment and filler, micrometer pigment and filler and other auxiliary agent; the flame-retardant coating contains no organic agent and halogen flame retardant, low VOC content, good fireproof property, good physical and chemical properties; the composition of the flame-retardant coating is as follows: the content of waterborne resin is 10-90%; the content of phyllo-silicate nanometer flame retardant which contains phosphor, nitrogen organic intercalation is 1-50%; the content of nanometer magnesium hydroxide flame retardant wrapped by polymer is 1-50%; the content of ammonium polyphosphate is 1-30%; the content of melamine is 1-20%; the content of carbon-forming agent is 1-30%; the content of nanometer pigment and filler is 0.1 to 30%; the content of micrometer filler is 0.1 to 60%; the content of dispersant is 0.1 to 10%; the content of stabilizer is 0.1 to 10%; the content of water is 0.1 to 50%; the content of micrometer pigment is proper; firstly, waterborne resin, nanometer flame retardant, ammonium polyphosphate, melamine, carbon-forming agent, nanometer pigment and fillers, dispersant and stabilizer are put into a planet stirring reactor for stirring and even dispersion; micrometer pigment and filler, water, dispersant and stabilizer are added to the discharged mixture and then put into a high-speed dispersion machine for even dispersion so that the product is obtained.

The invention provides a low-smoke halogen-free inflaming-retarding cable material and preparation method thereof. The cable material comprises 5 to 15 parts (part by weight) of compatilizer that comprises maleic anhydride functional group grafted ethylene-vinyl acetate copolymer and maleic anhydride functional group grafted ethylene propylene terpolymer; 85 to 95 parts of base material formed by blending two or more than two of linear low-density polyethylene, ethylene-vinyl acetate copolymer and ethylene propylene terpolymer granular materials; 2 to 6 parts of composite antioxidant composed of the following antioxidants in terms of weight ratio: hindered phenol antioxidants : thiol ester antioxidants = 1 : (2 to 6); 20 to 40 parts of ammonium polyphosphate; 10 to 20 parts of pentaerythritol; 8 to 15 parts of melamine; 50 to 100 parts of composite inorganic fire retardant composed of the following fire retardants: magnesium hydroxide : zinc borate = (2 to 4) : 1; 2 to 6 parts of lubricant; 0 to 0.5 parts of metal passivator; 0 to 3 parts of crosslinking assistant agent; and 0 to 5 parts of halogen-free master batch. The invention has provided a harmless halogen-free inflaming-retarding cable material having high temperature tolerance, high tension, high elongation and high fire resistance.

The invention provides an expanded type aqueous facing fireproof coating, which comprises the following components by weight: 10% to 30% of styrene-acrylic emulsion, 20% to 30% of ammonium polyphosphate, 10% to 20% of pentaerythritol, 15% to 25% of melamine, 5% to 10% of titanium dioxide, 2% to 8% of aluminum hydroxide, 1% to 5% of zinc borate, 1% to 2% of chlorinated paraffin, 0.05% to 0.2% of antiseptic, 0.1% to 0.2% of dispersing agent, 0.3% to 1.0% of film-forming auxiliary, 0.1% to 0.5% of cellulose ether, 0.5% to 2.0% of hydroxy silicone oil and the balance of water. The expanded type aqueous facing fireproof coating, provided by the invention, has the advantages of excellent water resistance and salt mist resistance, excellent adhesion and flexibility, good storage stability, no layering, no fineness change and no packing phenomenon, excellent waterproof resistance, smooth and fine coating film, no toxicity and pollution, and environment-friendliness.

The invention discloses a core-shell type ammonium polyphosphate synergetic flame-retardant polyurethane elastic composite material and a preparation method thereof, which is characterized in that the polyurethane elastic composite material containing core-shell type ammonium polyphosphate can be obtained by melting and co-mixing 75-94.9% of polyurethane, 5-25% of core-shell type ammonium polyphosphate and 0.1-5% of synergistic agent at the temperature of 160-220 DEG C for 5-30 minutes by weight percentage. The composite material can ensure that the adding amount of flame retardant is reduced while ensuring the flame retardance effect, and the composite material has good resistance of melt drip, simultaneously improves the shortcoming of poor water resistance of the flame-retardant composite material containing the ammonium polyphosphate, enhances the compatibility of the flame retardant and a polyurethane elastomer and improves the mechanical properties of the material, such as tensile strength, fracture strength and flame retardance performance, thereby meeting the requirements of fire protection safety and engineering applications.

The invention relates to fire-retardant paint with a steel structure, which is prepared from the following raw materials proportioning by weight: 45 to 60 of composite substrate resin, 6 to 8 of melamine, 6 to 8 of pentaerythritol, 16 to 20 of ammonium polyphosphate, 4 to 10 of expansible graphite, 2 to 5 of nano magnesium hydroxide, 1 to 3 of zinc phosphate, 1 to 3 of zinc borate, 2 to 5 of aluminum hydroxide, 3 to 5 of aluminum polyphosphate, 6 to 9 of titanium dioxide, 0.5 to 0.8 of flatting agent and 15 to 20 of acetone. The paint has excellent capabilities of fire prevention and corrosion prevention.

A flame retardant additive composition comprising a phosphoric acid salt selected from the group consisting of melamine phosphate, melamine pyrophosphate, melamine orthophosphate, diammonium phosphate, monoammonium phosphate, phosphoric acid amide, melamine polyphosphate, ammonium polyphosphate, polyphosphoric acid amide and combinations of two or more of the foregoing; a metal hydroxide; and an organic phosphate. The flame retardant additive is useful in a wide range of thermoplastic compositions.

The invention discloses a three-source integrated microcapsule intumescent flame retardant and a preparation method thereof. The flame retardant integrates an acid source, a carbon source and a gas source; and the preparation method comprises the following steps of: reacting polyethylene glycol, melamine, aqueous solution of formaldehyde, a promoter with distilled water to prepare polyethylene glycol modified melamine-formaldehyde prepolymer; suspending ammonium polyphosphate powder particles in a dispersing agent; and adding the prepolymer and a hardener to finally obtain the three-source integrated microcapsule intumescent flame retardant powder particles. The flame retardant has good compatibility, flame retardancy and waterproofness.

The invention discloses high-temperature resistant fiber filter paper for an engine oil filter and a preparation method of the high-temperature resistant fiber filter paper. The high-temperature resistant fiber filter paper comprises, by weight, 60-70 parts of coniferous wood pulp, 20-30 parts of cotton pulp, 20-30 parts of modified polyimide fiber, 2-5 parts of kaoline, 1-3 parts of lithopone, 2-4 parts of silica gel, 1-2 parts of nanometer titania, 0.5-0.8 part of ammonium polyphosphate, 1-2 parts of modified acrylic emulsion, 2-4 parts of acetic styrene-acrylic emulsion, 0.5-1 part of stearic acid monoglyceride, 0.5-1 part of silane coupling agent KH590, 0.4-0.8 part of sodium lauryl sulfate, and 2-5 parts of urea resin. The high-temperature resistant fiber filter paper prepared is good in water permeability, large in filtering area, small in maximum hole diameter, high in filtering precision, strong in bursting strength, high in temperature resistance and the like, has stable performance index under normal-temperature and high-temperature working conditions and is provided with good temperature resistance and filtering effects, and filtering efficiency of the high-temperature resistant fiber filter paper can reach 99.97%.

This invention discloses a composite material which is non-halogen, environment-friendly, inflatable flame-resistant, glass fiber polypropylene reinforced and method for making same. This invention compounds the inflatableaa (IFR) composed by polyammonium phosphate(APP), melamine(MEL) and pentaerythrite(PER) with polypropylene, so as to entitle polypropylene material good flame-resistant, The mechanics behaviour of the material could be reinforced largely through composition with long glass fiber, glass fiber felt and after interface modifying. This material contains no halogen constituent; it generates little smoke and smoketoxicity is small. Through controlling the content of flame-resistant in composite material, we can get polypropylene composite material whose limited oxygen index over 45 and has good mechanics behaviour. This material has good application foreground in the fields of electric, ship making, orbit and building materials, which is very sensible to expand the application range of PP.

The invention discloses an environment-friendly efficient filter filtering paper. The environment-friendly efficient filter filtering paper is prepared by the following raw materials in part by weight: 40-50 parts of softwood pulp, 30-40 parts of waste paper pulp, 20-30 parts of high-silica glass fiber, 2-5 parts of modified vermiculite, 1-3 parts of zeolite molecular sieve, 2-4 parts of nanometer calcium, 1-2 parts of modified pulverized fuel ash, 2-3 parts of water-solubility organic silicon resin emulsion, 1-2 parts of water-solubility polytetrafluoroethylene emulsion, 0.5-0.8 parts of ammonium polyphosphate, 3-4 parts of glycerol triacetate, 0.5-1 parts of diethanolamide, 0.5-1 parts of silane coupling agent KH560, 0.4-0.8 parts of sodium dodecyl sulfate, 0.5-1 parts of antioxidant DSTP, and 4-6 parts of polyethylenimine. The filtering paper prepared by the method provided by the invention has the advantages of being good in water permeability, large in filtering area, small in maximum diameter of hole, high in filtering precision, strong in bursting strength, high-temperature-resistant, good in water resistance and the like, can achieve the filtering efficiency by 99.98%, has stable performance index at atmospheric and high-temperature working conditions, as well as better temperature resistance and filtering effects.

The invention discloses a polypropylene halogen-free intumescent flame retardant, and relates to a flame retardant, for solving the problems that the flame retardancy is degraded and a flame retardant is easily separated out from a material as a conventional polypropylene halogen-free intumescent flame retardant is low in flame retardancy efficiency, low in thermal stability, low in water resistance and poor in compatibility with polypropylene. The polypropylene halogen-free intumescent flame retardant is prepared from a carbonizing agent, ammonium polyphosphate, an auxiliary fire retardant, a processing additive and a modification additive. The invention discloses the polypropylene halogen-free intumescent flame retardant.

The invention relates to a material used for a halogen-free, flame retardant and thermal shrinkage sleeve and crosslinked wires and cables as well as the preparation method, aiming to provide a material and the preparation preparation method for halogen-free, flame retardant and thermal shrinkage sleeve and crosslinked wires and cables in diversified colors. The preparation method comprises the following steps: first, evenly mixing the compound formed by polyolefin copolymer, silicon rubber, halogen-free ammonium polyphosphate composite fire retardant, lubricant, colorant color master batch and antioxidant in specific proportions through a high speed mixer, then extruding and granulating the compound by means of the mechanical blending, finally turning out the material for producing the halogen-free flame retardant and thermal shrinkage sleeve and crosslinked wires and cables.

The invention discloses a composite intumescent flame retardant which is composed of the following components in percentage by weight: 50-65% of acid source, 10-20% of gas source, 15-20% of carbon source and 10-20% of smoke inhibitor. The acid source is composed of at least one of ammonium polyphosphate, melamine phosphate and melamine polyphosphate, wherein the ammonium polyphosphate is crystal II ammonium polyphosphate with the average degree of polymerization of greater than 1000; the gas source is composed of at least one of melamine and dicyandiamide; the carbon source is composed of at least one of pentaerythritol and bis pentaerythritol; and the smoke inhibitor is composed of at least one of magnesium hydroxide, aluminum hydroxide and zinc borate. The invention also discloses a preparation method of the composite intumescent flame retardant.

The invention relates to an expansive flame-retardant polypropylene composition and a production method thereof. The composition comprises the following components: 100 weight parts of polypropylene, 10-30 weight parts of ammonium polyphosphate, 3.3-10 weight parts of pentaerythritol, 6.6-20 weight parts of melamine cyanurate, 0.5-5 weight parts of silicone rubber and 0.5-5 weight parts of montmorillonite. The total additional amount of ammonium polyphosphate, pentaerythritol and melamine cyanurate is at least 31 weight parts. The production method comprises the following steps: proportioning the components according to the weight parts, melting, mixing, extruding, and granulating. The composition has better flame retardation, good processability and mechanical property. The production method is simple and reliable.

The invention provides an aqueous film-forming foam extinguishing agent special for a fire extinguishing bullet and a throwing type fire extinguisher. The aqueous film-forming foam extinguishing agent has the advantages of being small in additive amount, rapid in fire extinguishing, good in recrudescence resisting effect, environmentally friendly, efficient and the like. The aqueous film-forming foam extinguishing agent comprises, by weight, 8 percent to 12 percent of main foaming agents, 8 percent to 20 percent of auxiliary foaming agents, two percent to 10 percent of antifreeze agents, 12 percent to 22 percent of cosolvents, 0.1 percent to one percent of stabilizers, 8 percent to 20 percent of fire retardants, two percent to five percent of burning-resistance agents and the balance water. The main foaming agents are selected from F1157N, F1203 and F1460, the auxiliary foaming agents are selected from lauryl sodium sulfate, ammonium lauryl sulfate, alkyl glycoside, dodecyl dimethyl betaine and cocamidopropyl betaine. The antifreeze agents are selected from ethylene glycol, glycerol and the like. The cosolvents are selected from dodecanol, n-butyl alcohol and diethylene glycol diethyl ether. The stabilizing agents are selected from xanthan gum, Arabic gum, guar gum and sodium alginate tech grade. The fire retardants are selected from ammonium polyphosphate and ammonium dihydrogen phosphate.

The invention relates to a halogen-free flame-retardant continuous fiber reinforced polypropylene composite material and a preparation method thereof. The material comprises the following components, by weight, 100 parts of polypropylene, 15-100 parts of continuous fiber, 1-12 parts of maleic anhydride grafted polypropylene, 0.08-0.7 parts of an antioxidant 1010, 0.06-0.6 parts of an antioxidant 168, 0.05-3 parts of a silicane coupling agent KH550, and 20-120 parts of a halogen-free expansion type flame retardant agent. According to the present invention, the flame-retardant agent comprising ammonium polyphosphate, melamine, a melamine borate and pentaerythritol is compounded with the polypropylene, such that the excellent flame-retardant performance is provided for the polypropylene; with the enhancement through the high performance continuous fiber, the mechanical property of the material is substantially improved; the flame-retardant material of the present invention does not contain halogen, the amount of the generated smoke is less, and the toxicity of the smoke is low; the requirements in fields of electricity, rail transportation, construction and the like can be met.

The invention relates to composite wallpaper containing polyvinyl chloride and discloses composite polyvinyl chloride (PVC) wallpaper with a flame retarding polyvinyl chloride (for short flame retarding PVC) coating or film as a surface layer and flame retarding paper as a bottom layer. Components of the flame retarding PVC surface layer, by weight ratio, comprise PVC resin 100, a plasticizer 0-50, a flame retardant 20-80, a stabilizing agent 0.01-1, filler 40-150, a foaming agent 0-1 and a thinning agent 0-10. Paper which is not flame retarding is soaked, flame retarding liquid is sprayed or brush-coated on the paper which is not flame retarding, and then drying is conducted to obtain the flame retarding paper. Compared with a traditional processing method of adopting antimonous oxide as a PVC surface layer flame retardant and adopting ammonium polyphosphate as a paper base layer flame retardant, the flame retarding PVC wallpaper is environment-friendly, low in toxicity and small in smoke density during burning, oxygen index can reach above 32%, and burning performance can reach a GB8624-2006B level.

A subject-matter of the invention is the use of a polyamide powder possessing a fireproofing property in a process for the manufacture of an object made of polyamide by sintering this powder using radiation, the said powder comprising, by weight, 2 to 40% of at least one flame retardant for respectively 98 to 60% of at least one polyamide, the flame retardant being a blend of at least one organic phosphinate of a metal and of at least ammonium polyphosphate.

Non-halogen fire-retardant polypropylene and its production are disclosed. The polypropylene consists of homopolymer polypropylene particle and fire-retardant agent. The fire-retardant agent consists of aluminum hydroxide, magnesium hydroxide and polyammonium phosphate. The process is treating aluminum hydroxide and magnesium hydroxide from coupling agent, coating polyammonium phosphate from cyanurotriamide -formaldehyde resin, dispersing treated nanometer particle on polypropylene matrix, premixing for polypropylene powder, nanometer aluminum hydroxide, magnesium hydroxide and polyammonium phosphate microcapsule proportionally in high-speed mixer from single-screw extrude and blend method, adding into single-screw extruder at normal feed rate, temperature and rotation speed, extruding, cooling and granulating. It achieves smokeless, non-toxic, good fire-retardant performance and less pollution.

The invention relates to the fire retardant coating technical field, in particular to steel-structure fire retardant coating taking self-crosslinkable silicone-acrylate composite emulsion as substrate as well as a preparation method thereof. The invention adopts polysiloxanes and self-crosslinkable polyacrylate composite emulsion as film-forming materials; moreover, based on the commonly used composite fire retardant comprising ammonium polyphosphate, melamine and pentaerythritol, melamine phosphate and early stage foaming agent with excellent carbonizing and foaming performances are added in the fire retardant coating, thereby greatly increasing the foaming capacity of the coating with the thickness of the foaming layer 20 times to 35 times of the prior coating; meanwhile, titanium pigment, sepiolite and aluminium silicate fiber are adopted as high temperature resistant filler, and propylene glycol is adopted as film-forming auxiliary agent; in addition, the fire endurance of the formed fire retardant coating can reach 90min (when coating thickness is 2mm). The coating has simple preparation method, no pollution, low cost and wide application.