36results about How to "High smoke suppression effect" patented technology

The invention relates to the field of flame retardants, and provides a sepiolite-based flame retardant and a preparation method thereof, the sepiolite-based flame retardant comprises the following raw materials by weight: 30-50 parts of antimony trioxide, 10-20 parts of modified sepiolite, 4-10 parts of a heat stabilizer, 10-20 parts of methyl silicone oil, and 0.5-4 parts of a dispersant. The sepiolite-based flame retardant provided by the invention has good flame retardance and smoke suppression performance, and has better commercial application value.

The invention relates to the technical field of wire and cable manufacturing, in particular to a high-flexibility low-smoke fire-fighting power cable and a preparation method thereof. The cable sequentially comprises a cable core, a shielding layer and an outer sheath layer from inside to outside, the outer sheath layer is prepared from the following preparation raw materials: 60 to 65 parts of methyl vinyl silicone rubber, 12 to 15 parts of ethylene propylene diene monomer, 8 to 10 parts of linear low-density polyethylene, 5 to 6 parts of cross-linking agent, 20 to 22 parts of flame retardant, 6 to 8 parts of reinforced flame-retardant filler, 20 to 25 parts of modified heat-conducting filler, 1.2 to 1.5 parts of coupling agent, 1.3 to 1.5 parts of antioxidant, 3 to 3.5 parts of lubricant, 2 to 2.5 parts of vulcanizing agent and 0.6 to 0.8 part of accelerant. The outer sheath layer of the high-flexibility low-smoke fire-fighting power cable prepared by the invention has excellent mechanical strength, toughness, heat-conducting property, high temperature resistance and flame retardant property, so that the high-flexibility low-smoke fire-fighting power cable has higher reliability and safety in fire-fighting power supply occasions.

The invention belongs to the technical field of high polymer materials, and particularly relates to a high-performance polymer material and application thereof in battery protection. The high-performance polymer material comprises a component A and a component B. The component A is prepared from the following raw materials in parts by weight: 60-80 parts of polyoxypropylene polyol D3000; 20 to 40 parts of polyether polyol 4110; 40 to 60 parts of isocyanate; the component B is prepared from the following raw materials in parts by weight: 50 to 70 parts of amino-terminated polyether; 40 to 50 parts of a chain extender; 1-3 parts of a dispersant; 2-4 parts of a defoaming agent; 4-8 parts of a flame retardant compound A; 3 to 7 parts of a polyphosphazene coated Ce doped g-C3N4 composite material; and 2 to 6 parts of a Cu-MOF material. The flame retardant compound A is self-made and added in the preparation process, and is matched with the polyphosphazene-coated Ce-doped g-C3N4 composite material and the Cu-MOF material, so that the flame retardant property of the polymer material is improved, the flame retardant property of the polymer material is also improved, and a good protection effect can be achieved in battery protection.

The invention discloses a flame-retardant modified PVC (polyvinyl chloride) composite material based on graphene-coated hydroxyl magnesium-aluminum hydrotalcite LDHs (layered double hydroxides) and a preparation method of the flame-retardant modified PVC composite material. The method comprises the following steps: S1, preparing hydrotalcite-based filler based on graphene-coated hydroxyl magnesium-aluminum hydrotalcite LDHs: S1-1, preparing graphene oxide GO; s1-2, preparing reduced graphene oxide r-GO; s1-3, preparing a hydrotalcite-based filler by a one-pot method; s2, loading a flame retardant on the hydrotalcite-based filler through an impregnation method to obtain a flame-retardant modified filler; s3, coating the flame-retardant modified filler with a polymer to obtain a composite modified filler; s4, mixing the composite modified filler, a stabilizer, a plasticizer and PVC to obtain the flame-retardant modified PVC composite material. The PVC composite material provided by the invention has excellent mechanical strength and thermal stability, and also has excellent flame retardant property and smoke suppression effect.

The invention relates to the field of flame retardants, in particular to a flame retardant synergist and a preparation method thereof. The flame-retardant synergist is prepared from the following raw materials in parts by mass: 20 to 30 parts of hydrotalcite, 5 to 15 parts of sepiolite and 0.5 to 1 part of phytic acid. The preparation method comprises the following steps: 1, mixing phytic acid with water to prepare a phytic acid solution for later use; step 2, hydrotalcite and a phytic acid solution are mixed under the condition of 200-300 r / min; 3, carrying out solid-liquid separation, wherein the solid part is a first product; step 4, mixing the first product, sepiolite and water under the condition of 2500 to 3000r / min; and step 5, carrying out solid-liquid separation, wherein the solid part is the flame-retardant synergist. The environment-friendly flame-retardant synergist provided by the invention is applied to plastics, can effectively improve the mechanical properties of plastic products, and shows excellent flame-retardant and smoke-suppressing effects.

The invention relates to the field of rubber, in particular to toughened modified nitrile rubber and a preparation method thereof.Magnesium hydroxide is selected as a flame retardant, nano molybdenum oxide hybridized magnesium hydroxide is prepared with a hydrothermal method and epoxidized with gamma-(2, 3-epoxypropoxy) propyltrimethoxysilane, then epoxy-amino reaction is utilized, and the toughened modified nitrile rubber is obtained. Grafting a vanillin-based phosphorus-nitrogen synergistic flame retardant; the vanillin-based phosphorus-nitrogen synergistic flame retardant is prepared by taking bio-based vanillin as a raw material, firstly synthesizing a phosphorus-containing dialdehyde intermediate serving as a precursor from the bio-based vanillin and phenylphosphonic dichloride, then carrying out condensation reaction on the phosphorus-containing dialdehyde intermediate and cyclic imidization melamine, and then carrying out addition with DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide), and the cyclic imidization melamine is prepared from melamine and 1, 2-cyclohexanedicarboxylic anhydride. Cellulose nanocrystals are selected to reinforce and toughen nitrile rubber, a sodium periodate oxidation method is adopted to prepare dihydroformylated cellulose nanocrystals, and then aldehyde group-amino reaction is utilized to graft a vanillin-based phosphorus-nitrogen synergistic flame retardant.

The invention relates to the technical field of composite materials, in particular to a synergistic flame-retardant epoxy resin-based porous sound insulation composite material and application thereof. The raw materials comprise 100 parts of bisphenol A epoxy resin, 15 parts of an aliphatic amine curing agent, 12 parts of ammonium dihydrogen phosphate, 6 parts of melamine, 4 parts of nano silicon dioxide, 5 parts of sodium chloride, 2 parts of ammonium bicarbonate, 0.8 part of carbon nanotubes and 0.5 part of a silane coupling agent. The synergistic flame-retardant epoxy resin-based porous sound-insulation composite material provided by the invention effectively solves the technical bottleneck that the flame-retardant, sound-insulation and mechanical properties of an epoxy resin-based material in the prior art are difficult to synergistically improve, and has remarkable beneficial effects in multiple aspects.

The present application relates to a kind of preparation methods of smoke-suppression type emulsion explosive composite wax resin, including using the C5 olefin rich component of 50~75 ℃ of cracking C5 rectification interception as raw material, first by the cationic polymerization of anhydrous aluminium chloride catalysis to obtain refined resin liquid D, then copolymerization with p-divinylbenzene and allyl phosphoric acid diester.The emulsion explosive composite wax prepared by the present application has good environmental protection and comprehensive physicochemical properties, and has important significance for the preparation and application of environmental protection type emulsion explosive.

The invention relates to the technical field of wires and cables, and discloses a high-temperature-resistant wire and cable and a preparation method thereof. The wire cable comprises a conductor, a shielding layer, an insulating layer, a high-temperature-resistant layer and a sheath layer from outside, the surface of the conductor is wrapped with the shielding layer, the insulating layer is extruded outside the shielding layer, the high-temperature-resistant layer is extruded outside the insulating layer, and the high-temperature-resistant layer is wrapped with the sheath layer; the sheath layer is obtained by coating a high-temperature-resistant layer with a sheath material, the sheath material takes PVC resin as a main matrix, ethylene propylene rubber and fluororubber which are good in high-temperature resistance are added for blending, and auxiliaries such as a modified halloysite / PDA / Fe composite material and a plasticizer are added, so that the flame retardance, the high-temperature resistance and the like of the wire and cable are improved; the silicone rubber material of the high-temperature-resistant layer is synthesized by taking silicone rubber with excellent high-temperature resistance as a base material and adding an auxiliary agent, so that the high-temperature resistance of the cable is further improved.

This invention relates to a flame retardant with both microwave absorption and smoke suppression functions. The flame retardant is a hierarchical porous metal-organic framework material with a three-dimensional polygonal structure, a size of 1-3 μm, and a pore size distribution between 1.0-50.0 nm. It carries nano-transition metal oxides internally and on its surface, with the nano-transition metal oxides accounting for 25%-65% of the total mass. The flame retardant provided by this invention possesses microwave absorption, flame retardancy, and smoke suppression properties. Its initial decomposition temperature is 442℃±10℃, with significant mass loss in the temperature range of 450-700℃. At 800℃, the residue content is as high as 50% or more, exhibiting excellent thermal stability and meeting the processing requirements for flame retardants in polyurea, epoxy resin, and polycarbonate.

This invention discloses a novel fire-resistant and flame-retardant polypropylene material, its preparation method, and its application in cables, belonging to the technical field of flame-retardant polymer materials. The material comprises 85-100 parts of propylene resin, 15-45 parts of a halogen-free intumescent flame retardant, 5-15 parts of a flame-retardant synergist, 3.5-7 parts of a compatibilizer, 0.5-2 parts of an antioxidant, 2-6 parts of a filler, and 2-3 parts of a lubricant. The flame-retardant synergist is prepared by reacting DOPO-PhOH, SPDPC, and trimethylamine, and has intramolecular chemical bonds of DOPO, a bispiral cyclic phosphorus structure, and aromatic groups. This invention utilizes the synergistic effect of the condensed-phase charring and gas-phase free radical capture of this flame-retardant synergist to achieve a UL94 V-0 rating for polypropylene at low addition levels, significantly suppressing dripping and reducing smoke density while maintaining good tensile strength and elongation at break. This solves the contradiction between flame-retardant efficiency and mechanical properties in traditional halogen-free flame-retardant systems, making it suitable for cable insulation layers.

The invention provides a single-component slow-curing flame-retardant smoke-suppression polyurethane for roads and a preparation method of a mixture containing the same. The mixture comprises the following raw materials: a stone combination, a single-component polyurethane adhesive, a curing agent and an inorganic flame retardant, and a pore-forming material is added into the single-component polyurethane adhesive. According to the method, the smoke density is reduced without the help of a large number of smoke suppression materials, the size of an internal pore structure is freely adjusted and controlled from a polyurethane body structure, efficient smoke absorption is achieved, and the method has a good effect on tunnel environment application.

This invention discloses an intrinsic flame-retardant epoxy resin containing phthalonitrile and Schiff base structures, its preparation method, and its applications, belonging to the field of flame-retardant polymer materials technology. The intrinsic flame-retardant epoxy resin of this invention simultaneously contains phthalonitrile units, Schiff base units, and epoxy functional groups in its molecular structure. Its preparation method includes: obtaining an intermediate through a nucleophilic substitution reaction of nitrophthalonitrile with aminophenol, followed by Schiff base condensation with dihydroxybenzaldehyde, and finally reacting with epichlorohydrin to introduce epoxy groups. This resin combines the condensed-phase charring effect of phthalonitrile with the gas-phase flame-retardant effect of Schiff bases, producing a synergistic effect. When used as an intrinsic resin or additive in epoxy resin compositions, as an intrinsic resin, the cured product exhibits excellent flame-retardant properties. As an additive, it can improve the flame retardancy and mechanical properties of epoxy resin while maintaining thermal properties, exhibiting excellent flame-retardant efficiency.

The invention relates to a preparation method of a durable flame-retardant smoke-suppressing cotton fabric based on a phosphorus / nitrogen / silicon flame retardant, which comprises the following steps: dissolving diethylenetriaminepenta (methylene phosphonic acid) and tris (2, 3-epoxypropyl) isocyanurate in a solvent to obtain a mixed solution, dropwise adding (3-glycidoxy) trimethoxysilane into the mixed solution at a rate of 0.5-1mL / min, reacting at a temperature of 60-80 DEG C for 1-2 hours, and then adding a catalyst to obtain the flame-retardant smoke-suppressing cotton fabric based on the phosphorus / nitrogen / silicon flame retardant. Reacting to obtain a phosphorus / nitrogen / silicon flame retardant solution; secondly, dicyandiamide is added into the phosphorus / nitrogen / silicon flame retardant solution, then ammonia water is added to adjust the pH to 6-8, and flame-retardant finishing liquid is obtained; and finally, immersing the cotton fabric into the flame-retardant finishing liquid, and preparing the durable flame-retardant smoke-suppressing cotton fabric based on the phosphorus / nitrogen / silicon flame retardant through a rolling and baking process. The product prepared by the method disclosed by the invention has excellent flame-retardant durability and smoke suppression performance.

The invention discloses a biomass flame-retardant epoxy electronic packaging material and a preparation method thereof.The biomass flame-retardant epoxy electronic packaging material is prepared from epoxy resin and a flame-retardant curing agent, the chemical formula of the flame-retardant curing agent is C32H24B2N4O4, the structural formula of the flame-retardant curing agent is # imgabs0 #, the flame-retardant curing agent contains a benzimidazole-like structure, so that the thermal stability and the char forming amount of the flame-retardant curing agent are improved, and the flame-retardant curing agent does not contain phosphorus or halogen and is environmentally friendly. And only environment-friendly flame-retardant elements nitrogen and boron are contained. And the existence of boron and nitrogen elements has good flame retardant efficiency improvement and smoke suppression performance. Meanwhile, the flame retardant contains active amino groups and can be used for epoxy curing.

The invention relates to the technical field of foam materials, and discloses a reaction type nitrogen and phosphorus-containing graphene flame retardant modified polystyrene foam, a polystyrene grafted nitrogen and phosphorus-containing graphene flame retardant has a polystyrene molecular chain, so that the polystyrene grafted nitrogen and phosphorus-containing graphene flame retardant has good interfacial compatibility with expandable polystyrene, and the expandable polystyrene has good mechanical properties. The nitrogen-phosphorus-containing graphene flame retardant has good dispersibility in expandable polystyrene, reduces the graphene agglomeration phenomenon, reduces the influence of the nitrogen-phosphorus-containing graphene flame retardant on the mechanical strength of the polystyrene foam board, and enables the modified polystyrene foam to maintain good tensile strength, bending strength and other mechanical strength. Meanwhile, the nitrogen-phosphorus-containing graphene flame retardant forms a nitrogen-phosphorus synergistic flame-retardant system in the combustion process, and graphene is uniformly dispersed in polystyrene foam to form a continuous carbon layer, so that the polystyrene foam is endowed with carbon forming property and smoke suppression property under the synergistic effect, and the flame retardance and smoke suppression property of the foam material are enhanced.

The utility model discloses an emergency smoke exhaust system which comprises a smoke exhaust fan, a smoke exhaust pipeline, an emergency power supply and a spraying device, the smoke exhaust pipeline is provided with an inlet of the smoke exhaust pipeline and an outlet of the smoke exhaust pipeline, the inlet of the smoke exhaust pipeline is arranged indoors, and the outlet of the smoke exhaust pipeline is arranged outdoors. The smoke exhaust fan is arranged at an outlet of the smoke exhaust pipeline, and the spraying device is arranged at an outlet of the smoke exhaust fan. The fire extinguishing and smoke abatement device is reasonable in structural design, the smoke exhaust fan can operate under the emergency situation that a power source is cut off to achieve negative pressure smoke exhaust, water curtain smoke abatement is achieved at an outlet, and the fire extinguishing and smoke abatement effect is good.

The invention discloses a smoke-suppression low-toxicity adhesive for a core-board as well as a preparation method and application of the smoke-suppression low-toxicity adhesive, and belongs to the technical field of flame-retardant core-boards. Phytic acid is used as an acid regulator, a urea-formaldehyde resin adhesive preparation process is improved, glyceryl ether is added in the preparation process for modification, the toughness of urea-formaldehyde resin is improved, and the flame retardance of the core-board is improved. Ether bonds in glyceryl ether are flexible chain segments, and after the flexible chain segments are added, a larger free space is generated, so that cross-linked chain segments become soft, and meanwhile, energy is absorbed when the cross-linked chain segments are broken to achieve a toughening effect. Phytic acid has very strong electronegativity, can be combined with metal ions and positively charged compounds, and forms a stable coordination network with metal ions in the silicate mineral dispersion liquid with the modified layered structure, so that the agglomeration phenomenon of the silicate mineral dispersion liquid with the modified layered structure is reduced; meanwhile, the content of phosphorus in phytic acid molecules is high, the phytic acid molecules have high catalytic char forming capacity, the problems that the flame retardant property is not obvious, the strength is low and the toughness is poor when a silicate mineral dispersion liquid of a modified layered structure is independently used are solved, and meanwhile the prepared core-board has the advantages that the bonding strength is high, the flame retardant property reaches the B1 level, the smoke release amount is low, and a mouse contamination test shows that the flame retardant property can reach the ZA2 level.

The invention provides a flame-retardant and smoke-suppressing nanocellulose-based reinforced modified material and a preparation method thereof.The preparation method comprises the steps that loaded modified phosphorylated nanocellulose, modified mica nanosheets, a nonionic surfactant and deionized water are mixed to obtain a composite suspension liquid, the composite suspension liquid is subjected to ultrasonic dispersion, and the flame-retardant and smoke-suppressing nanocellulose-based reinforced modified material is obtained. The composite dispersion liquid is subjected to spray drying, and the nanocellulose-based reinforced modified material is obtained. According to the flame-retardant and smoke-suppressing nano-cellulose-based reinforced modified material and the preparation method thereof, the flame-retardant and smoke-suppressing nano-cellulose-based reinforced modified material is prepared by compounding the loaded modified phosphorylated nano-cellulose and the modified mica nanosheets, and the reinforced modified material can be used as a performance enhancer of high-molecular polymers such as coatings, rubber, plastics, foods and medical materials; the product structure is improved, and the physical and chemical properties, such as mechanical properties, flame retardant properties and smoke suppression properties, of the product are improved.

The invention discloses an ethylene-vinyl acetate copolymer composite material and a preparation method thereof, relates to the field of high polymer materials, and aims to solve the problems of lower flame-retardant efficiency and poorer water resistance and smoke suppression property of the existing flame-retardant modified EVA flame retardant. The composite material comprises an ethylene-vinyl acetate copolymer, a flame retardant, a synergist, a compatibilizer, a lubricant and an antioxidant. The method comprises the following steps: 1, firstly adding the flame retardant, the synergist, the compatibilizer, the lubricant and the antioxidant into a high-speed mixer, uniformly mixing, then adding the ethylene-vinyl acetate copolymer, and continuously uniformly mixing to obtain a mixed material; and 2, adding the mixed material into an internal mixer, heating, melting and blending, and carrying out compression molding to prepare the ethylene-vinyl acetate copolymer composite material. The EVA composite material which is efficient in flame retardance, low in smoke release, waterproof and good in mechanical property is prepared, and the requirements for the high-performance flame-retardant EVA composite material in different fields of electric wires, cables, traffic transportation and the like are met.

The invention relates to a preparation method of a polyester / cotton blended fabric with lasting flame-retardant and smoke-suppressing functions, the polyester / cotton blended fabric is immersed in a flame-retardant finishing liquid, the polyester / cotton blended fabric with lasting flame-retardant and smoke-suppressing functions is prepared through a rolling and baking process, and the flame-retardant finishing liquid is obtained by adding dicyandiamide into a phosphorus / nitrogen / silicon flame retardant solution; the preparation method of the phosphorus / nitrogen / silicon flame retardant solution comprises the following steps: dissolving diethylenetriaminepenta (methylene phosphonic acid) and polyvinyl alcohol in water, adding ammonia water to adjust the pH value of the solution to 6-8 to obtain a mixed solution, dropwise adding an ethanol solution of tetraethyl orthosilicate into the mixed solution at the rate of 0.5-1mL / min, and reacting to obtain the phosphorus / nitrogen / silicon flame retardant solution. The phosphorus / nitrogen / silicon flame retardant is firmly grafted on the polyester / cotton blended fabric through the adhesion capacity of the polyvinyl alcohol film and the covalent bond reaction of the polyvinyl alcohol film and the cotton fiber, and the prepared product has excellent flame retardance and smoke suppression performance.

The invention belongs to the technical field of bio-based high polymer materials and adhesives, and relates to a preparation method and application of a phytic acid-based branched flame-retardant adhesive. Comprising the following steps: S1, carrying out heating reaction on glycerol and phytic acid under a solvent-free condition to form a phytate prepolymer; s2, adding maleic anhydride into the phytate prepolymer obtained in the step S1, and carrying out esterification reaction, so as to obtain functionalized branched polyphosphate; and S3, mixing the functionalized branched polyphosphate obtained in the step S2 with chitosan in water, heating and stirring to obtain the phytic acid group branched flame-retardant adhesive. After being cured under a hot-pressing condition, the adhesive prepared by the invention still keeps the shear strength of not less than 0.7 MPa after being soaked in hot water at 63 DEG C, the limit oxygen index reaches 80%, and the adhesive shows excellent flame retardant property and bonding stability. The raw material source is renewable, the process is green, no organic solvent is needed, and the adhesive is suitable for adhesion of various base materials such as wood, metal and glass, and is particularly suitable for preparing flame-retardant plywood.

The invention belongs to the field of functional aids, and particularly relates to a durable smoke suppression flame retardant and a preparation method thereof. The preparation method of the flame retardant comprises the following steps: firstly, adding cyanuric chloride and a solvent into a reaction device together, stirring until cyanuric chloride is completely dissolved, and heating to reflux temperature; dissolving boron spiro with a corresponding molar weight with a solvent, and dropwise adding into the reaction device; after complete reaction, phosphoric acid is diluted with a solvent and dropped into the reaction device, heating, reaction, reduced pressure distillation, washing, purification and drying are performed, and the target flame retardant is obtained. The flame retardant has more reactive groups and forms firmer chemical bond combination with fabric, the washing resistance of the flame retardant is effectively improved, the synergistic effect of the smoke suppression component and the flame retardant component is better, and the smoke suppression performance of the flame retardant is effectively improved.

The invention relates to a preparation method of a durable flame-retardant smoke-suppressing brocade / cotton blended fabric, which comprises the following steps: adding diethylenetriaminepenta (methylene phosphonic acid) into water, adding ammonia water to adjust the pH value to 5-6 to obtain a solution A, dropwise adding an ethanol solution of tetraethyl orthosilicate into the solution A, reacting, and adding dicyandiamide to obtain a solution containing an anionic phosphorus / nitrogen / silicon flame retardant; then immersing the brocade / cotton blended fabric into a solution containing an anionic phosphorus / nitrogen / silicon flame retardant, and carrying out padding and baking treatment; immersing the treated brocade / cotton blended fabric into a polyacrylamide solution, and carrying out padding and drying treatment; and finally, repeating the process of padding the solution containing the anionic phosphorus / nitrogen / silicon flame retardant and the polyacrylamide solution for 2-3 times to prepare the durable flame-retardant smoke-suppressing brocade / cotton blended fabric. The product prepared by the method disclosed by the invention has excellent flame-retardant smoke suppression performance and washing resistance.

The utility model is applicable to the technical field of fire fighting, and provides a smoke abatement and fire extinguishing device for fire fighting, which comprises a water tank, the top of the water tank is fixedly connected with a fixed box, the top of the fixed box is provided with a rotating bracket, the inside of the rotating bracket is rotatably connected with an air duct, and the inside of the air duct is fixedly connected with a fan; and a replaceable filter element is arranged at one end of the air duct. According to the smoke abatement and fire extinguishing device for fire fighting, by arranging the filter element, the steel ball, the extrusion cylinder, the clamping groove, the movable groove and the elastic mechanism, a user can conveniently and rapidly replace the filter element under the condition that the filter element filters smoke for a long time, the smoke abatement effect is improved, and the practicability is high. The problems that although an existing smoke abatement and fire extinguishing device can associate a smoke discharging mechanism with a water spraying mechanism, but the existing smoke abatement and fire extinguishing device is not provided with a replaceable filtering device, the filtering effect of the filtering device becomes poor in the state that smoke is filtered for a long time, and the smoke abatement effect is reduced are solved.

The invention relates to the technical field of new materials, and discloses a spirocyclic phosphate lignin flame-retardant modified ABS (acrylonitrile-butadiene-styrene) plastic, spirocyclic phosphate lignin grafted polyacrylonitrile is used as a flame-retardant modifier and is fused and mixed with ABS plastic, and a molecular chain of the spirocyclic phosphate lignin grafted polyacrylonitrile has good compatibility with the ABS plastic, can be used as a compatilizer, and can be used as a flame retardant for flame-retardant modification of the ABS plastic. According to the present invention, the compatibility of the spirocyclophosphoryl lignin and the ABS plastic is significantly enhanced, the influence on the impact strength and other mechanical properties of the ABS plastic due to the non-uniform dispersion of the spirocyclophosphoryl lignin is avoided, the organophosphate in the spirocyclophosphoryl lignin is adopted as the flame retardant component, and the lignin is adopted as the expansion carbon source so as to provide the flame retardant effect in the high temperature combustion process, the organic phosphate flame-retardant component is thermally decomposed to generate a large amount of oxygen-containing phosphoric acid and other substances, lignin carbonization can be promoted, a continuous and stable carbon barrier layer is formed, and the flame retardance and smoke suppression performance of the ABS plastic are enhanced.

The invention discloses a smoke suppression and bird repelling sand-containing fog sealing layer and a preparation method thereof. The smoke suppression and bird repelling sand-containing fog sealing layer comprises the following components in parts by mass: 35-70 parts of asphalt; 30 to 70 parts of water; 2-8 parts of a composite emulsifier; 0.5 to 3 parts of a defoaming agent; 10 to 60 parts of acrylic ester; 0.1 to 1 part of a photoinitiator; 20 to 40 parts of a suspending agent; 20 to 45 parts of fine sand particles; 5-40 parts of a smoke suppression and bird repelling microcapsule; according to the smoke suppression and bird repelling microcapsule, a shell material is a composite shell material comprising silicon dioxide / nano tourmaline, and a core material comprises one or more of halogenated aromatic aldehyde and amino aromatic ester; a metal chelate is loaded on the surface of the shell material. The smoke-suppressing bird-repelling sand-containing fog sealing layer disclosed by the invention not only has good pavement performance, but also can play a long-acting bird-repelling effect, and meanwhile, can also effectively suppress the amount of pollutants generated when the asphalt pavement is exposed to high temperature and solarization.

The utility model relates to the technical field of sound insulation plates, in particular to a phenolic foam sound insulation plate. The structure sequentially comprises a surface sound absorption layer, a first enhancement layer, a main sound insulation layer, a second enhancement layer, a fireproof layer and a bottom reflection layer from top to bottom. The surface sound-absorbing layer is made of open-cell phenolic foam, and a hemispherical groove is formed in the surface of the surface sound-absorbing layer; the main sound insulation layer is made of closed-cell phenolic foam; the first reinforcing layer and the second reinforcing layer are made of glass fiber gridding cloth and are embedded into the upper surface and the lower surface of the main sound insulation layer respectively. The fireproof layer adopts a nano aluminum hydroxide coating and is coated on one side, far away from the main sound insulation layer, of the second enhancement layer; the bottom reflecting layer is an aluminum foil film and covers the side, away from the main sound insulation layer, of the fireproof layer. Through the design of a multi-layer composite structure, the sound insulation performance and the strength and fireproof performance of the sound insulation board are effectively improved, multiple noise reduction mechanisms of sound absorption, blocking and reflection are formed, and the sound insulation board can be widely applied to building and industrial scenes and has environment friendliness and economical efficiency.

The invention discloses a high-entropy layered double hydroxide coated flame-retardant smoke suppressant as well as a preparation method and application thereof, the flame-retardant smoke suppressant is a coated flame-retardant smoke suppressant taking a smoke suppressant as a shell layer and a phosphorus flame retardant as a core, and the smoke suppressant and the phosphorus flame retardant are combined in a chemical bond manner through the bonding effect of a silane coupling agent; the smoke suppressant is a high-entropy layered double hydroxide smoke suppressant; and the silane coupling agent is gamma-aminopropyl triethoxy silane. Silanization reaction sites are introduced to the surface of the phosphorus-based flame retardant, HELDH is induced to grow in situ on the surfaces of particles, a stable coating layer is formed, and integrated fixation and synergistic release of the smoke suppression component and the flame-retardant component on the single-particle scale are achieved. In the combustion stage, the HELDH and the pyrolysis product thereof cooperate with phosphorus-based components to promote char formation and capture smoke dust / inhibit volatile matter release, so that the flame retardance, the smoke suppression property and the processing stability are synchronously improved.

The invention discloses a preparation method of a PVC plastic composite pipe, and belongs to the technical field of plastic pipes. The preparation method is used for solving the technical problems that in the prior art, when polyvinyl chloride is prepared into a pipe, the processing fluidity is poor, and when a coupling agent modified inorganic flame retardant is doped into a PVC resin material, migration is prone to occurring, and the heat stability and the smoke suppression effect are poor. The preparation method of the PVC plastic composite pipe comprises the following steps: carrying out melt extrusion on modified polyvinyl chloride, a resin compound and a flame-retardant smoke suppressant to prepare the PVC plastic composite pipe, the resin compound is obtained by reacting polyvinyl alcohol, epoxy resin E-51, epoxy resin E-44 and polysulfide rubber; the flame-retardant smoke suppressant is obtained by coating a double-layer metal hydroxide with an iron-pyridine complex and then loading the double-layer metal hydroxide on activated carbon. The modified polyvinyl chloride reacts with the resin compound, so that the processability and the smoke suppression effect are improved; the flame-retardant smoke suppressant contains a multi-layer structure and multiple distributed active metal sites.