183results about How to "Promote charcoal" patented technology

The invention relates to an environmental protection based red mud combination modification synergism fire-retardant polyethylene, and belongs to the technical field of compressive utilization and fire-retardant plastics. The fire-retardant polyethylene is suitable for fire safety protection in important public places in the fields of electric products, building materials and transportation. The fire-retardant polyethylene consists of the following components in percentage by weight: 30 to 35 percent of polyethylene, 34 to 39 percent of red mud, 6 to 13 percent of red phosphorus, 5 to 17 percent of zinc borate, 3 to 8 percent of ethylene-vinyl acetate copolymer, 2 to 7 percent of grafted polyethylene, and 2 to 8 percent of silicone oil. The preparation process comprises the following steps of: grinding and drying the red mud; blending the ground red mud with other raw materials according to the blending ratio; mixing the mixture with polyethylene resin by fully stirring at a high speed; fusing, co-mixing and processing the mixture; and preparing a sample. The processing conditions comprise that: the roll temperature of a double-roller mixing mill is between 140 and 150 DEG C; and the forming temperature of the flat vulcanizing machine sample is between 120 and 130 DEG C, the heating time is between 4 and 8 minutes, and the pressure is between 10 and 20MPa. The fire-retardant system meets the requirements of industrial application on mechanical property, and simultaneously has comprehensive properties such as good fire-retardant effect, low cost, environmental protection and the like; moreover, the application field of the red mud is widened, and the red mud product with high added value is prepared.

The invention discloses a flame-retardant composite material with DOPO (9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) modified nano mesoporous molecular sieve, belongs to the fields of nano mesoporous molecular sieve flame-retardant synergists and halogen-free flame-retardant composite materials, and particularly relates to the preparation method of the DOPO modified nano mesoporous molecular sieve and the flame-retardant composite material with the DOPO modified nano mesoporous molecular sieve. The DOPO is of a hexahydric phosphorus-heterocyclic-ring structure, and is a novel flame retardant intermediate. The nano mesoporous molecular sieve is the flame-retardant synergist. The invention discloses the method for preparing the DOPO modified nano mesoporous molecular sieve and the flame-retardant composite material with the DOPO modified nano mesoporous molecular sieve. Since the compound flame-retardant synergist plays a role in phosphorus / silicon synergistic flame retardance, the obtained product has good expandable carbon forming property, the flame-retardant efficiency of the material is obviously increased, the remaining amount of the residual carbon and the compact degree of a carbon layer are increased, and further the flame redardancy of the composite material is improved to a greater degree.

The invention provides a thermoplastic low-fume halogen-free high-flame retardance polyolefin insulation material and a preparation method thereof. The thermoplastic low-fume halogen-free high-flame retardance polyolefin insulation material comprises the following principal components in parts by weight: 30-40 parts of ethylene-vinyl acetate copolymer resin, 30-40 parts of polyolefine elastomer resin, 20-30 parts of polyethylene resin, 10-20 parts of compatilizers, 200-250 parts of hydrate fire retardants, 5-10 parts of charring agents, 1-2 parts of flame-retardant synergists, 0.5 parts of antioxidants A, 0.5 parts of antioxidant B and 5-10 parts of lubricants. The preparation method comprises the following steps of: preparing the materials contained in a raw material formula in parts by weight respectively, and then feeding the materials into a milling machine for uniform mixing; then feeding the mixture into an extruder to extrude cut granules; then screening through a vibrating screen; and finally cooling and packaging to obtain a finished product. The thermoplastic low-fume halogen-free high-flame retardance polyolefin insulation material provided by the invention has the advantages of better heat-resistant property and processing property and flame-retardant grade enhancement. The preparation method of the thermoplastic low-fume halogen-free high-flame retardance polyolefin insulation material, which is provided by the invention, is reasonable in design and easy and convenient to operate.

The invention relates to a preparation method of a microcapsule fire retardant, and belongs to the technical field of fire retardant. According to the preparation method, magnesium hydroxide, ammoniumpolyphosphate, and melamine phosphate are mixed for coating of zeolite molecular sieve, wherein melamine phosphate is capable of achieving flame resistance at a condensed phase and a gas phase, a large amount of latent heat is absorbed through sublimation, volatilization, and evaporation, inert gas is generated, and gas state substances such as MA steam, water vapor, N2, CO2, and NH4 are generated, the concentrations of oxygen and combustible gas at a combustion zone are reduced through dilution, and at the same time, coating of material surface is realized; charing is promoted, formation ofmolten drops from some polymers is promoted, so that a part heat energy is taken away, and combustion reaction is terminated; the zeolite molecular sieve is a crystal aluminosilicate formed by SiO4 and Al2O3 tetrahedrons through oxygen bridges; not only uniform pore structures, and large specific surface area, but also extremely high surface polarity is achieved. The zeolite molecular sieve possesses excellent absorption effect and certain catalyst effect, and flame resistance of the microcapsule fire retardant is improved.

The invention discloses an irradiation cross-linked thermoplastic polyester elastomer cable material. The irradiation cross-linked thermoplastic polyester elastomer cable material comprises, by weight, 100 parts of thermoplastic polyester elastomer (TPEE), 15-40 parts of ethylene-vinyl acetate copolymer (EVA), 50-80 parts of a fire retardant, 0.3-2 parts of a lubricant, 0.3-3 parts of an antioxidant and 0.1-1 part of an ultraviolet light stabilizer. The invention also discloses a method for producing cables through using the cable material. Cable products produced by using the cable material have excellent room temperature and high temperature mechanical performances; irradiation crosslinking realizes good flame retardation performance on the premise of meeting environmental protection, and also realizes cost reduction; and the cable material can reach 125DEG C temperature resistance level, has excellent scratch and wear resistance, and can be widely used in the fields of automobile wires and high and low temperature resistant cables.

The invention provides a rare-earth oxide and microencapsulated red phosphorus synergic flame retardance PA6 composite and a preparation method thereof. The rare-earth oxide and microencapsulated red phosphorus synergic flame retardance PA6 composite is characterized by being prepared from PA6, microencapsulated red phosphorus and rare-earth oxide. Rare-earth oxide is introduced into a red phosphorus flame-resistant polymer material system, rare-earth oxide can catalyze dehydrated carbonization of red phosphorus, a more compact and continuous charcoal layer structure can be formed, the mass transfer process of volatile products generated by polymer degradation to a gas phase is blocked, feedback of heat generated by gas phase combustion to a condensed phase is also blocked, and flames are prevented from propagating and spreading.

The invention discloses a preparation method of flame-retardant modified polyvinyl acetate used for expanded polystyrene beads. In an existing method, 6-(4-formylphenoxy) cyclotriphosphazene and DOPO are prepared into a compound comprising phosphazene and DOPO double-effect functional groups through a solution and a fusion method, wherein the nitrogen content of the compound is 1.9%, the nitrogen content is small, and flame retardance is low. According to the preparation method, 1-thiourea ethyl acrylate-6-aminophenoxy cyclotriphosphazene reacts with vinyl acetate and chloroform under the action of a catalyst and polar solvent to prepare 1-thiourea ethyl acrylate-6-aminophenoxy cyclotriphosphazene vinyl acetate comprising phosphazene and DOPO double-effect functional groups. The features that the product contains phosphate and nitrogen and is free of halogens, and compared with an existing double-effect functional group compound of the type, the nitrogen content is greatly increased and are utilized for sufficiently exerting the synergistic action of phosphate and nitrogen; the flame-retardant modified polyvinyl acetate is applied to preparing emulsion wrapping the polystyrene beads, and achieves the expected effects of higher flame-retardant efficiency and smaller toxin.

The invention discloses an environmental-friendly & flame-retardant polycarbonate composite material, which comprises the following raw materials: polycarbonate, polyvinyl butyral, polypropylene, polyvinylidene fluoride, octafluoro-diphenyl diglycidylether, an ethylene / vinyl acetate copolymer, nano titanium dioxide, nano aluminium hydroxide, carbon nanofibers, montmorillonite, nano zinc oxide, a silane coupling agent KH-560, tri(2,4-diiso-butyl benzene) phosphate, hexaphenoxy cyclotriphosphazene, potassium perfluorobutanesulfonate, nano zinc stannate, ferrocene, molybdenum disulfide, a plasticizer and an antioxidant. The environmental-friendly & flame-retardant polycarbonate composite material provided by the invention is excellent in flame resistance, and can meet the requirements of many fields of television and computer and the like; and the material is good in comprehensive performance and long in service life.