13results about How to "Good smoke suppression" patented technology

The invention discloses gel foam for preventing spontaneous combustion of coal, and belongs to the technical field of gel foam fire extinguishing. The gel foam comprises the following components: 0.1-0.5% of a composite foaming agent, 5-15% of a gelling agent, 0.1-0.5% of a cross-linking agent and the balance of water, the composite foaming agent is sodium lignin sulfonate and sodium fatty alcohol polyoxyethylene ether carboxylate; the gels are silica sol and sodium alginate. The gel foam has excellent water-retaining property, and can relieve water loss and weight loss of coal; the flame retardant can effectively hinder the contact between coal and oxygen, interrupt the free radical chain reaction of coal and avoid the oxidation weight gain of coal, and has an excellent flame retardant effect; in the combustion process, less heat is generated, and the smoke suppression effect is excellent. The gel foam does not contain antioxidants and flame retardants, can avoid environmental pollution, is an environment-friendly anti-oxidation gel foam, and can be used as an efficient fire preventing and extinguishing material in the field of preventing spontaneous combustion of coal.

The invention relates to a recyclable nuclear pore structure MOF nanometer flame retardant and a preparation method thereof, and belongs to the technical field of nanometer and flame retardant crossing. According to the MOF nano flame retardant with the nuclear pore structure, provided by the invention, after polyurethane foam is soaked in the high-concentration nano flame retardant, a foam material does not have a molten drop phenomenon, is self-extinguished after being away from fire and cannot be secondarily ignited, and the foam material shows good flame-retardant and heat-insulating effects and is outstanding in smoke suppression effect. And after being introduced into the foam material, the foam material has improved elasticity, and the nuclear pore structure endows the foam material with higher sound insulation and noise reduction effects.

The invention discloses a preparation method of a distributed power generation variable frequency driving cable, and belongs to the technical field of power cables. The prepared cable is composed of a cable core, a filling material, a metal shielding layer, an aluminum-plastic composite layer and an outer sheath layer. Wherein the outer sheath layer is prepared from the following raw materials in parts by weight: 70-90 parts of polypropylene resin, 22-30 parts of ethylene-vinyl acetate copolymer, 15-25 parts of modified magnesium hydroxide and 4-6 parts of lubricant. Polypropylene is used as a matrix, so that the cable is endowed with excellent mechanical property and electrical insulation property; wherein the ethylene-vinyl acetate copolymer can enhance the anti-aging performance of the cable; wherein the modified magnesium hydroxide has good compatibility with a polypropylene matrix, can greatly enhance the flame retardance, smoke suppression, aging resistance and rat-proof performance of the cable, and is stable in performance; therefore, the prepared cable is good in mechanical property, has stable and efficient flame retardance, smoke suppression, aging resistance and rat-proof performance, and has important application value in the technical field of power cables.

The invention discloses a lignin-hydroxyapatite / biomass-based composite aerogel as well as a preparation method and application of the lignin-hydroxyapatite / biomass-based composite aerogel. The preparation method comprises the following steps: firstly dispersing hydroxyapatite in a weak base solution, then adding sodium lignin sulfonate and sodium alginate, uniformly stirring, then dropwise adding a glucolactone solution, pouring into a mold to form hydrogel, freezing the hydrogel in liquid nitrogen or a refrigerator, and then freeze-drying to obtain the composite aerogel. According to the invention, sodium alginate is taken as a base material, lignin is introduced as a carbon-forming agent and a structure reinforcing agent, and the organic / inorganic composite aerogel is prepared by using the combination of glucolactone slow-release hydroxyapatite, so that the thermal insulation property, mechanical property and smoke suppression property of the composite aerogel can be remarkably improved. Hydrophobic modification is carried out on the prepared aerogel, and the application field of the aerogel is greatly widened. The prepared aerogel has the characteristics of low thermal conductivity, high porosity, high strength and high flame retardance, and meanwhile, a new way is opened for resource utilization of lignin.

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 present application relates to the technical field of high polymer material flame-retardant modification, and particularly relates to a COF hierarchical modification APP-based core-shell flame-retardant smoke suppressant, a preparation method and application thereof. The flame-retardant smoke suppressant takes APP as a flame-retardant core layer; takes PVP as a soft template agent, and assists in situ growth of melamine-p-phenylenedimethylene formaldehyde (COF) on the surface of APP to adsorb combustible volatile components in the initial pyrolysis stage, provide a gas source, and act as a Fe 3+ coordination skeleton; takes tannic acid as a coordination agent and a carbon source, and constructs a multi-level core-shell structure with Fe 3+ coordination. The present application realizes integration of flame-retardant and smoke suppression functions through hierarchical modification. When the flame-retardant agent is applied to polyurethane, it can significantly reduce the heat release rate, smoke release rate and toxic gas generation amount, and simultaneously improve the compatibility with the matrix, effectively overcoming the defects of poor compatibility and insufficient flame-retardant and smoke suppression performance of traditional APP flame-retardant agents. The present application has simple preparation process and controllable conditions, and is suitable for industrial production.

The invention discloses an in-situ preparation method of a cyclophosphazene derivative PS-coated organic montmorillonite flame retardant and natural rubber flame retardant application thereof. The cyclophosphazene derivative PS-coated organic montmorillonite flame retardant comprises organic montmorillonite as a core material and a cyclophosphazene derivative PS as a coating layer, and the surface of the core material is coated with the coating layer; the cyclophosphazene derivative PS is prepared from phosphonitrilic chloride trimer and 4, 4 '-dihydroxy diphenyl sulfone, the cyclophosphazene derivative PS is coated with organic montmorillonite to serve as a flame retardant, the flame-retardant rubber is prepared by blending the flame-retardant rubber with a natural rubber system, the limit oxygen index of the prepared flame-retardant rubber can reach 29.5%, and the peak value of the heat release rate can be reduced to 568.5 KW / m < 2 >.

The invention relates to the technical field of organic silicon foam materials, and provides a preparation method of novel flame-retardant smoke-suppression organic silicon foam doped with a surface-modified metal organic framework material. ZIF-8 powder in a surfactant modified MOF material is used as a powder filler for flame retardance and smoke suppression of organic silicon foam, fine and uniform modified MOF particles are used as nucleation centers for foaming in a section of vulcanization process after uniform mixing and coating, and foam pores are uniform and fine. On one hand, the modified ZIF-8 particles have super-strong adsorption and charring effects when subjected to high-temperature action; the porous structure of the ZIF-8 adsorbs smoke particles and harmful gas, and can decompose and absorb heat and isolate external heat at the same time; and on the other hand, metal compounds generated by pyrolysis in the combustion process participate in formation of a carbon layer, diffusion of smoke is prevented, metal oxides and some non-combustible gases can be generated, and the metal oxides block heat transmission while more external heat is absorbed.

The invention discloses a bio-based core-shell structure flame retardant and an application thereof in a bio-based plate. According to the invention, a phosphorus-carbon synergistic flame-retardant core-shell structure flame retardant is developed by taking a phosphorus-containing halogen-free flame retardant as a core and carrying out free radical copolymerization reaction on a furfuryl alcohol (FA) derivative containing phosphorus in different oxidation states and bismaleimide (BMI) with a charring function to form a cross-linked flame-retardant macromolecular shell layer. The core-shell flame retardant is proportionally mixed with crushed materials of a biological base material and an adhesive, and the mixture is subjected to hot press molding to obtain the flame-retardant biological base material. The flame retardant provided by the invention not only can endow a biological base material with good flame retardance and mechanical properties, but also can solve the problem of long-term durability of the biological base material.

The invention discloses a fireproof flame-retardant building insulation board and a preparation method thereof, and relates to the technical field of insulation boards. When the fireproof flame-retardant building insulation board is prepared, polystyrene sequentially reacts with dimethylallylamine and 3-(3-bromopropyl) thiophene to prepare modified polystyrene; the preparation method comprises the following steps: reacting pentaerythritol with boric acid to prepare a boric acid ester flame-retardant monomer; the preparation method comprises the following steps: carrying out a reaction on magnesium hydroxide and 3-chloropropyltriethoxysilane to prepare pre-modified magnesium hydroxide; carrying out a reaction on the pre-modified magnesium hydroxide, a boric acid ester flame-retardant monomer and 2-(allyloxy)-4, 6-dichloro-1, 3, 5-triazine to prepare modified magnesium hydroxide; the modified polystyrene and the modified magnesium hydroxide are mixed and then subjected to supercritical foaming, and a polystyrene board is prepared; and sequentially coating the polystyrene board with the thiophene finishing liquid and the benzoxazole finishing liquid to obtain the fireproof flame-retardant building insulation board. The fireproof flame-retardant building insulation board prepared by the invention has excellent flame-retardant, anti-aging, antibacterial and electromagnetic shielding properties.

The invention relates to the field of power cables, and in particular to a halogen-free flame-retardant power cable and a preparation method thereof. The halogen-free flame-retardant power cable comprises a core, a shielding layer and an outer sheath layer from the inside to the outside, wherein the outer sheath layer is made of a blended masterbatch, wherein the blended masterbatch comprises the following raw materials in parts by weight: 60-70 parts of low-density polyethylene, 10-15 parts of high-density polyethylene, 1-3 parts of a peroxide cross-linking agent, 0.8-1 parts of a lubricant and 6-8 parts of flame-retardant and smoke-suppressing microspheres; by adding the flame-retardant and smoke-suppressing microspheres, the problem of insufficient flame-retardant and smoke-suppressing performance of existing power cables is solved, and at the same time, the addition of halogen-containing compounds is avoided to reduce the occurrence of secondary fire disasters.

The invention relates to the field of flame-retardant materials, in particular to high-flame-retardance epoxy resin and a preparation method thereof. The preparation raw materials of the high-flame-retardancy epoxy resin comprise a material A and a material B, the material A comprises the following raw materials in parts by mass: 100 parts of flame-retardant epoxy resin, 1-2 parts of a dispersing agent and 60-100 parts of an inorganic flame retardant; and the material B comprises the following raw materials in parts by mass: 60-100 parts of a curing agent, 0.1-0.3 part of a catalyst and 60-100 parts of an inorganic flame retardant. Through the synergistic flame-retardant design of the flame retardant and the flame-retardant filler, the problem of poor flame-retardant durability caused by purely adding the flame retardant or using the common filler is effectively solved, the prepared epoxy resin shows excellent flame-retardant property in a UL94 vertical combustion test, and meanwhile, the flame-retardant property of the epoxy resin is improved by reasonably adjusting the proportion of the flame retardant. On the premise of ensuring high flame retardance, the mechanical properties of impact, stretching, bending, compression and the like of the material are considered, and various mechanical indexes are stable and meet the use requirements of the ignition coil.

The application discloses a kind of zinc hydroxystannate coated piperazine modified ammonium polyphosphate composite flame retardant and its preparation method and application.Utilize the electronegative oxygen atom of zinc hydroxystannate and the polar group-NH2 + Form hydrogen bond connection, to build molecular association structure.And by infrared spectrum characterization association-NH2 + Group of the infrared shift of association of the present application successfully prepared zinc hydroxystannate and piperazine modified ammonium polyphosphate mass ratio is 1: (5-20) molecular association flame retardant, the raw materials used have realized industrial production.The beneficial effects of the present application are as follows: preparation process is simple, easy to operate, the mass ratio of zinc hydroxystannate and piperazine modified ammonium polyphosphate of the molecular association flame retardant prepared is 1:20, and when the addition amount in nylon 6 is 10wt%, the limiting oxygen index reaches 30.3%, UL-94 reaches V-0 level, and the smoke suppression effect is remarkable.