343results about How to "High synergistic flame retardant performance" patented technology

The invention discloses halogen-free flame-retardant rigid polyurethane foamed plastic and a preparation method for the same. The polyurethane foamed plastic consists of the following raw materials in parts by weight: 100 parts of polyalcohol mixture, 105 to 180 parts of polyisocyanate, 20 to 80 parts of compound halogen-free flame retardant, 1 to 50 parts of foaming agent, 1 to 3 parts of composite catalyst, 2 to 4 parts of foam stabilizer and 1 to 2 parts of cross-linking agent. An obtained product is high in flame retardance and environment-friendly, the raw materials are free of halogen, and the production of toxic gas such as hydrogen halide during combustion is avoided; the raw materials are readily available and low in cost, so that the preparation cost of the polyurethane foamed plastic is greatly lowered; the polyurethane foamed plastic also has the characteristic of wide application range, and is applied to cold storage and heat-preservation industries of external wall heat-preservation of buildings, heat-preservation of pipelines, refrigerators, freezers and the like.

The invention relates to a method for preparing a mesoporous silica nanometer composite flame retardant, comprising the following steps of: (1) using a silicon source as a precursor, preparing a silica compound by a sol-gel chemical principle under the action of a structure-directing agent, and removing the structure-directing agent to obtain mesoporous silica; (2) dissolving a certain amount of phosphorus type and phosphorus-nitrogen type fire retardants in water or a volatile solvent to form an uniform solution; and (3) adding a proper amount of the mesoporous silica particles prepared from the step (1), stirring for hours at a certain temperature, removing water or the volatile solvent, carrying out vacuum drying, grinding, and sieving to obtain the mesoporous silica nanometer composite flame retardant. The preparation method provided by the invention has advantages of simple preparation process, mild condition and safe process. The prepared composite flame retardant is nanoparticles, has good dispersibility and excellent synergistic flame retardant and smoke suppression effects, and can be widely applied in flame retardation of a plurality of materials.

The invention relates to a tris(dichloropropyl) tribromophenoxy chloropropyl silicate compound which is a silicon-halogen synergistic fire retardant, and a preparation method of the compound. The compound has a structure shown in a formula described in the specification; and in the formula, OC3H5Cl2 is OCH2CHClCH2Cl or OCH (CH2Cl) 2. The preparation method of the compound comprises the following steps: reacting tribromophenyl glycidyl ether and silicon tetrachloride according to the same molar ratio in an organic solvent for 4-6h at 60-80 DEG C; then dropwise adding dichloropropanol according to a certain molar ratio, reacting for 4-8h at 50-100 DEG C; and finally purifying to obtain faint yellow liquid which is the tris(dichloropropyl) tribromophenoxy chloropropyl silicate. The compound is applicable to fire retardants for polyvinyl chloride, polyurethane, epoxy resin, unsaturated resin and other materials; and the production process is simple, low in equipment investment and cost, and suitable for industrial production.

The invention discloses a halogen-free flame-retardant resin composition which comprises the following components in parts by weight: 20-70 parts of solventless resin, 20-70 parts of solvent, 0-50 parts of curing agent, 8-35 parts of inorganic flame retardant, 0.01-1 part of promoter and 3-30 parts of phosphazene flame retardant; the respective components are mixed and stirred at 20-60 DEG C to prepare a colloidal liquid, and the halogen-free flame-retardant resin colloidal liquid is coated on glass cloth through a vertical or horizontal gluing machine, and is pre-dried through a drying path of the gluing machine to prepare a glass cloth prepreg; and the glass cloth prepeg is further cut and put in a hot press for hot forming to prepare a halogen-free flame-retardant glass cloth laminatedplate or mould pressing composite material. When the halogen-free flame-retardant resin composition is adopted, the prepared halogen-free flame-retardant glass cloth laminated plate can meet the requirements for large-sized electrical machinery and electric appliances, electronic devices and environmental friendliness, and is suitable for F-level and H-level electrical insulating materials of many electrical products such as laminated sheet materials of electronic products, motors, transformers, and the like.

The invention relates to a novel coordinate flame retardant compound of three elements silicon, chlorine and bromine, and a preparation method thereof, and in particular relates to a silicon halide coordinate flame retardant plasticizer tetrabromobisphenol A bi[tri(dichloropropoxy) silicon acyloxy chloropropyl] ether compound and a preparation method. The structure of the compound is expressed by the following formula: n is equal to 1 when m is 0, the n is equal to 1 when the m is 1, and x is 0, 1, 2 or 3. The preparation method comprises the following steps of: under stirring, dissolving tetrabromobisphenol A bisepoxy propyl ether in an organic solvent; dropping the mixture in silicon tetrachloride at the temperature of 25 DEG C; after dropping, carrying out insulation reaction for 3-4 hours at the temperature of 70-80 DEG C; dropping epoxychloropropane according to a certain mole ratio; reacting for 7-8 hours at the temperature of 80-100 DEG C; and carrying out purification treatment to obtain the tetrabromobisphenol A bi[tri(dichloropropoxy) silicon acyloxy chloropropyl] ether. The product isa good flame retardant plasticizer, and is suitable for being used as a flame retardant plasticizing additive such as epoxy resin, polyvinyl chloride, unsaturated polyester resin, and polyurethane.

The invention relates to a silicon-halogen synergic flame retardant triazinetri-tri(chloropropyl) silicate compound and a preparation method thereof, in particular to a tri{2-chloro-3-[tri(chloropropoxy)siacryloxy]propyl}isocyanurate compound and a preparation method thereof. The compound has the structural formula shown in the specification, wherein OC3H6Cl is OCH2CHClCH3 or OCH2CH2CH2Cl or OCH(CH3)CH2Cl. The preparation method comprises the following steps of: controlling a certain molar ratio of raw materials; enabling triepoxypropylisocyanurate to react with silicon tetrachloride at 60 DEG C for 4-6 hours in an organic solvent; adding epoxypropane and reacting at 50-60 DEG C for 4-6 hours; and purifying to obtain the product triazinetri-tri(chloropropyl) silicate. The triazinetri-tri(chloropropyl) silicate provided by the invention has good flame-retardant plasticizing property and is suitable to be used as a flame-retardant plasticizer of polyvinyl chloride, polyurethane, epoxy resin, unsaturated resin and the like; and the production technology is simple, the cost is low, and the industrial production is easy to realize.

The invention discloses a resin composition which comprises the following solids by weight: (a) 100 parts of a bismaleimide resin prepolymer, (b) 5-80 parts of cyanate ester, (c) 0-50 parts of a flame retardant and (d) 0-65 parts of inorganic filler, wherein the bismaleimide resin prepolymer is obtained by carrying out reaction on an allyl compound and bismaleimide resin and the ratio of bismaleimide resin and allyl compound by weight is 100: (10-120). According to the resin composition disclosed by the invention, by adopting siloxane containing allyl at the tail end as a modifier of bismaleimide resin and limiting the content of siloxane in the modifier, unreacted siloxane resin is not generated in reaction, so that the advantages and characteristics of siloxane resin can be fully exerted and the interlaminar adhesive force at the high temperature is greatly improved. Moreover, the thermal expansion properties of the solids are optimized, so that the resin composition satisfies the requirements on high precision electronic substrate materials.

The invention relates to a nitrogen, silicon and chlorine thee-element synergic flame retardant tri{2-chloro-3-[tri(chloroethoxy)silicon acyloxy]propyl}isocyanurate compound and a preparation method thereof. The structure of the compound is shown as a formula in the specification. The preparation method comprises the following steps: dripping organic solvent solution of triglycidyl Isocyanurate into silicon tetrachloride, and reacting for 4 to 6 hours at a temperature of between 50 and 70 DEG C; and cooling to 30 DEG C, introducing ethylene oxide under the liquid surface, reacting for 2 to 3 hours at a temperature of between 45 and 55 DEG C, and purifying to obtain the tri{2-chlor-3-[tri(chloroethoxy)silicon acyloxy]propyl}isocyanurate. The compound has good flame retardant plasticization, and is suitable for flame retardant plasticizer such as polyvinyl chloride, polyurethane, epoxy resin, unsaturated resin and the like; and the method has simple production process and low cost, and is easy for industrial production.

The invention discloses an ammonium polyphosphate / SiO2 composite aerogel flame-retardant reinforced timber which comprises a timber and an ammonium polyphosphate / SiO2 composite aerogel in timber pores. The invention also discloses a preparation method of the flame-retardant reinforced timber, which comprises the following steps: pretreating the timber with microwaves to form new flow channels in the timber, thereby enhancing the timber permeability; hydrolyzing the previously prepared ammonium polyphosphate and silicon source by pressure dipping treatment, and introducing the generated uniform sol solution into the timber; and carrying out condensation reaction and normal-pressure drying to generate the ammonium polyphosphate / SiO2 composite aerogel in the timber pore structure in situ. The ammonium polyphosphate / SiO2 composite aerogel flame-retardant reinforced timber has favorable flame-retardant and smoke-inhibition functions, and can effectively prevent the flame retardant from loss. The composite aerogel in the timber pores has the effect of enhancing wear resistance and corrosion resistance. The method can be widely used in flame retardancy, reinforcement and corrosion resistance of the solid wood or composite wood, has the advantages of feasible technical process, cheap raw materials and favorable effect, and is worthy of popularization.

The invention discloses halogen-free and flame-retardant hard polyurethane foam plastic and a preparation method thereof, relating to foam plastic. Raw materials include polyether polyol 4110, polymethylene polyphenyl isocyanate, a tertiary amine catalyst, dibutyltin dilaurate, a silicon-carbon bond foam stabilizer, 2,4,6-tri(dimethylaminomethyl)phenol, a foaming agent, octa-(3-hydroxyl-3-methyl butyl dimethylsiloxy)silsesquioxane, dimethyl methylphosphonate and micron-sized alpha-alumina trihydrate. The method comprises the following steps of: mixing the polyether polyol 4110, tertiary aminecatalyst, dibutyltin dilaurate, silicon-carbon bond foam stabilizer, 2,4,6-tri(dimethylaminomethyl)phenol, foaming agent, octa-(3-hydroxyl-3-methyl butyl dimethylsiloxy)silsesquioxane and micron-sized alpha-alumina trihydrate to obtain A; adding the dimethyl methylphosphonate into A to obtain B; and adding the polymethylene polyphenyl isocyanate into B, pouring into a mold for foaming, curing anddemolding to obtain the halogen-free and flame-retardant hard polyurethane foam plastic.

The invention relates to a tri{2-chloro-3-[tri(dichloropropoxy)silicon acyloxy]propyl}isocyanurate compound and a preparation method thereof. The structure of the compound is shown in the specification. The preparation method comprises the steps of adding triglycidyl isocyanurate in a certain molar ratio to silicon tetrachloride, preserving heat at 60 DEG C and reacting for 4-5 hours, then dropwise adding epoxy chloropropane in a certain molar ratio, preserving heat at 70-90 DEG C and reacting for 6-8 hours to obtain tri{2-chloro-3-[tri(dichloropropoxy)silicon acyloxy]propyl}isocyanurate through purification treatment. The compound is an excellent flame-retardant plasticizer; and the preparation method is simple in production process and low in equipment investment and is easy for industrial production.

The invention discloses a polymer fire retardant coating for a steel plate and a preparation method of the coating. Added filler has good dispersity in the coating, agglomeration is not easily caused, the heat resistance and the fire resistance are high, and the coating can have a good fire protection effect on the steel plate.

The invention relates to a flame retardant of an environment-friendly expansion type flame retardant coating and a preparation method thereof. In the present invention, tea saponin is used as gas source, acid source and carbon source to form a new type of flame retardant in a certain proportion. Alkyd resin varnish is used as base material, and auxiliary agents such as coupling agent and dispersant are added to form a high-efficiency flame retardant. burn paint. In terms of the weight percentage of the solid content of the coating, its important components are: alkyd resin varnish 40-60%; ammonium polyphosphate 25-35%; pentaerythritol 12-18%; tea saponin 2-5%; silane coupling agent 1 -3%; organic bentonite 1-3%. The preparation method is as follows: mix tea saponin, ammonium polyphosphate and pentaerythritol in proportion, grind them sufficiently to obtain superfine powder, then add them to alkyd resin varnish in a certain proportion, stir and mix well, add silane coupling The joint agent and organic bentonite are fully stirred and dispersed in a high-speed shear mixer to obtain a finished product. The invention does not contain a halogen flame retardant, has the advantages of low volatility, excellent flame retardancy, good coating film performance, high efficiency and environmental protection, and the like.

The invention discloses an external wall thermal insulation material and a preparation method thereof. The external wall thermal insulation material is prepared from the following raw materials in parts by weight: 80-90 parts of methylene diphenyl diisocyanate, 65-75 parts of polyether polyol, 20-30 parts of straw fiber, 10-15 parts of glass fiber, 20-25 parts of organic nano-montmorillonite, 30-35 parts of flame retardant, 25-30 parts of smoke suppressor, 1-5 parts of reaction catalyst, 8-15 parts of crosslinking catalyst, 1-5 parts of coupling agent, 15-25 parts of deionized water and 1.5-5 parts of foam stabilizer. The prepared external wall thermal insulation material has the advantages of good fireproof property, high thermal insulation property, high wear resistance, high stability, high physical and mechanical properties, low cost and saving of energy.

The invention discloses a tanning agent with high flame-resistance amino-resin nano-composite function, which is prepared by the method as follows: firstly, melamine, dicyandiamide, formaldehyde and acidic components are used as raw material to prepare flame-resistance amino-resin prepolymer; secondly, montmorillonite or organic montmorillonite are modified by tetrakis hydroxymethyl phosphonium and silane coupling agents to obtain modified montmorillonite or modified organic montmorillonite; finally, the prepared flame-resistance amino-resin prepolymer and the obtained modified montmorillonite or the modified organic montmorillonite are processed through in-situ intercalation compounding reaction. The tanning agent not only has better tanning performance and retanning filling performance, but also brings good flame-resistance and washable migration resistance to leather goods, and the addition quantity is less, and the flame retardant efficiency is high.

The present invention relates to a flame-retardant styrene resin composition, which comprises the following components in weight part: 85-90 parts of styrene resin, 4-6 parts of halogen-based flame retardant, 1-2 parts of antimony-based flame retardant, 3-5 parts of phosphorus-based flame retardant, 0.1-0.2 part of antioxidant, and 0-2.0 parts of impact modifier. According to the technical scheme of the invention, under the synergistic effects of the antimony-based flame retardant, the phosphorus-based flame retardant and the halogen-based flame retardant, the flame-retardant efficiency of styrene resin is effectively improved. The flowability and the apparent quality of styrene resin are improved. Therefore, the problems in the prior art that styrene resin is difficult in injection molding and low in gloss can be solved. As a result, the flame-retardant styrene resin composition has a wide application prospect.

The invention relates to a halogen-free flame retardant containing linear phenolic aldehyde and a polymer material containing the halogen-free flame retardant. A small quantity of metal hydroxides can be added simultaneously for serving as synergistic flame retardants. Phosphorus pentoxide generated by the combustion of red phosphorus reacts with a phenolic hydroxyl group in the linear phenolic aldehyde, and phosphonic acid or metaphosphoric acid and the like are generated simultaneously; and the acids of the type are further used for catalyzing dehydration and char formation of phenolic resin, and are esterified with the phenolic hydroxyl group, so that an organic-inorganic hybrid barrier layer is formed. The barrier layer is used for blocking heat conduction, diffusion and permeation of oxygen and overflow of combustible matter and slowing material degradation and the like, so that combustion is stopped finally, and flame is extinguished. A flame retarding effect can be further improved by using a small quantity of hydroxides and inorganic flame retardants containing crystal water. A halogen-free flame retardant composition can be used for retarding combustion of polymers and polymer compositions. A halogen-free flame retardant system disclosed by the invention has the advantages of low cost, low toxicity, wide application and the like, and contributes to environmental protection.

The invention discloses halogen-free flame retardant nylon 6 with high heat resistance as well as a preparation method and application thereof. The halogen-free flame retardant nylon 6 with high heat resistance comprises the following components in percentage by weight: 30-80% of nylon 6, 10-50% of polyphenyl ether, 0.5-10% of compatilizer, 2-10% of toughening agent, 5-20% of halogen-free flame retardant, 0.2-1.0% of coupling agent, 0.2-0.6% of antioxidant and 0.2-2.0% of lubricant. Compared with conventional nylon subjected to flame retardant modification by adopting a single-component halogen-free flame retardant, the high heat resistance halogen-free flame retardant nylon 6 has the advantages that the nylon 6 is subjected to halogen-free flame retardant modification by compounding the PPE (Polypheylene ether) with good flame retardant property and the halogen-free flame retardant, so that the mechanical property and heat resistance of the material can be improved in the objective flame retardant grade, and thus the application range of the material is expanded.

The invention provides a method for synthesizing a hyperbranched ionic liquid fire retardant based on HCCP. According to the method, HCCP reacts with trialkylamin, trialkyl phosphorus, and N-alkyl imidazole to realize ionization, salts such as sodium tetrafluoroborate, potassium hexafluorophosphate and bistrifluoromethanesulfonimide lithium, which contain different anions, are used for ion exchange, so that a hyperbranched ionic liquid fire retardant containing different anions is obtained, and synergistic flame retardance of HCCP and the ionic liquid is realized. The synthesized hyperbranched ionic liquid based on HCCP can be used as the fire retardant in various polymers.

The invention discloses a graphene modified silicone rubber cable sheath material. The material is prepared from raw materials as follows: phenyl siloxane rubber, methyl vinyl silicone rubber, fluororubber, polybutadiene rubber, polyurethane, ethylene-acrylate rubber, zinc oxide, stearic acid, 2,4-dichlorobenzoyl peroxide, an assistant crosslinker TAIC, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, cerium oxide, fumed silica, carbon black, nano calcium carbonate, stearic acid modified magnesium hydroxide, ammonium polyphosphate, modified graphene oxide, nano silicon carbide, magnesium stearate, triphenyl phosphate, tributyl citrate, an accelerator, an anti-aging agent and silane modified cellulose. The graphene modified silicone rubber cable sheath material is high in strength, excellent in heat resistance and flame retardation, good in aging resistance and long in service life.

The invention relates to a high-flame-retardation low-smoke PVC composite material for boosting communication light cables, and a preparation technology thereof. The high-flame-retardation low-smoke PVC composite material for boosting communication light cables comprises, by weight, 100 parts of PVC resin with the polymerization degree of 1300, 15-40 parts of tricapryl trimellitate, 10-30 parts of phosphate ester, 10-20 parts of tetrabromophthalate, 10-30 parts of an ethylene-n-butyl acrylate-glycidyl ester copolymer, 5-15 parts of chlorinated polyethylene, 3-15 parts of diantimony trioxide, 3-15 parts of zinc stannate, 20-40 parts of magnesium hydroxide, 20-40 parts of aluminum hydroxide, 10-30 parts of ammonium molybdate, 5-15 parts of montmorillonite, 10-20 parts of a silicon-magnesium synergistic flame retardant, 5-10 parts of a calcium-zinc composite stabilizer, 1-3 parts of a lubricant, 0.2-1 part of an antioxidant, 2-4 parts of an acrylate polymer, and 1-3 parts of a linear polymer of alpha-methyl styrene. The high-flame-retardation low-smoke PVC composite material has the advantages of high flame retardation, good fire resistance, low smoke during combustion, unlikely propagation of flames, low heat release amount, and low release amount of toxic gases.

The invention discloses a halogen-free flame-retardant and cold-resistant PC material suitable for a charging pile charging gun and a preparation method thereof. The material comprises the following components in percentage by weight: 92-94 percent of polycarbonate polydimethylsiloxane, 0.1-0.12 percent of a flame retardant, 4-6 parts of a toughening agent, 0.5-0.6 percent of an anti-dripping agent, 0.1-0.2 percent of a main antioxidant, 0.3-0.4 percent of an auxiliary antioxidant, 0.4-0.5 percent of a lubricating agent and 0.3-0.5 percent of a weather resistance agent. A polycarbonate polydimethylsiloxane block copolymer is excellent in low temperature resistance as a dimethylsiloxane segment is introduced; meanwhile, polydimethylsiloxane can promote PC carbon forming during combustion, has a good synergistic flame-retardant effect together with an additive type flame retardant agent and can effectively reduce the consumption of the additive type flame retardant agent. The halogen-free flame-retardant and cold-resistant PC material suitable for the charging pile charging gun is prepared by taking the polycarbonate polydimethylsiloxane as a main body and through the addition of the sulfonate flame retardant, the organic silicon type toughening agent, the anti-dripping agent, the antioxidant, the weather resistance agent, the lubricating agent and the melt blending of a double-screw extruder.

The invention discloses a metal hybrid POSS flame retardant as well as a preparation method and application thereof. The chemical structural formula of the metal hybrid POSS flame retardant is shown in the specification, wherein R is -H or a group disclosed in the invention. The metal hybrid POSS flame retardant is obtained by taking oligomeric polyhedral silsesquioxane (POSS-NH2) as a raw material through vertex-opening, vertex-capping and nucleophilic substitution chemical reaction. The synthesized POSS derivative simultaneously contains three flame-retardant elements, namely silicon, phosphorus and zirconium, and can be used as an efficient flame retardant to modify various polymers, so that the application range of the polymers is expanded.

The invention relates to the field of flame-retardant polymer materials and particularly relates to a novel halogen-free flame-retardant composition, halogen-free flame-retardant PBT engineering plastic composite material and a preparation method thereof. The halogen-free flame retardant FRs is mainly obtained by mixing FR1, FR2, FR3, FR4 and FR5 at a specified ratio and the substances are used in combination so that the halogen-free flame-retardant system has higher heat-resistant stability and good fire-retardant property. The halogen-free flame-retardant PBT engineering plastic composite material is mainly prepared from PBT, alkali-free glass fiber, the halogen-free flame retardant FRs, a CTI synergist, an antioxidant, a lubricant, a coupling agent, a compatibilizer and a toughener; by the cooperation of each component, the prepared halogen-free flame-retardant PBT engineering plastic composite material has excellent comprehensive properties such as flame retardant property, electrical property, heat resistance, mechanical property and coloring property; the preparation method of the composite material is simple and feasible and the prepared composite material has excellent comprehensive properties.

The invention discloses a synergistic flame retardant metal ion treated montmorillonoid PC / ABS (polycarbonate / polyacrylonitrile) alloy material and a preparation method of the alloy material. The alloy material is prepared from the following components by weight percent: (1) 60%-75% of polycarbonate, (2) 5%-25% of ABS (acrylonitrile-butadiene-styrene) resin, (3) 2%-5% of a compatibilizer, (4) 10%-15% of a fire retardant and (5) 1%-5% of metal ion treated montmorillonoid. The alloy material has the advantages that metal ions are replaced to the surface of a sheet layer of the montmorillonoid, so that the problem that metal oxides and metal salt particles are not easily dispersed in polymer materials is well solved; the dispersity of the montmorillonoid in a polymer matrix is improved, so that the contact between the metal ions and the polymer matrix is greatly improved, the synergistic flame retardant effect of the metal ions and the flame retardant is enhanced, and the heat performance and the flame retardant property of polymers are improved.

The invention discloses a high-strength smoke-inhibiting high-temperature-resisting cable sheath material. The high-strength smoke-inhibiting high-temperature-resisting cable sheath material comprises following raw materials in parts by weight: 20-35 parts of chlorosulfonated polyethylene, 20-35 parts of EVA (Ethylene Vinyl Acetate) resin, 10-15 parts of modified methyl vinyl silicone rubber, 1.5-3 parts of stearic acid, 2-5 parts of calcium carbonate, 0.3-0.8 parts of 2,4,6-tritertiary butyl phenol, 0.8-1.3 parts of an accelerant TMTD (Tetramethylthiuram Disulfide), 1.5-2.5 parts of an accelerant DM (2,2'-dibenzothiazoledisulfide), 3-13 parts of microencapsulated covered red phosphorus, 15-20 parts of cetyl trimethyl ammonium bromide modified montmorillonoid, 20-25 parts of magnesium hydroxide, 15-20 parts of aluminum hydroxide, 3.5-8.3 parts of tricresyl phosphate, 35-45 parts of high-wear-resisting carbon black and 25-32 parts of modified kaolin; the content of vinyl acetate in the EVA resin is 18-23%. The high-strength smoke-inhibiting high-temperature-resisting cable sheath material has good smoke-inhibiting and inflaming retarding effects and excellent environmental stress cracking resistance.

The invention relates to a nano flame retardant epoxy resin composite material and a preparation method thereof and belongs to the technical field of flame retardants. A one-step method is adopted, the surface of a carbon nano tube is coated with a novel phosphorus-nitrogen flame retardant obtained through polycondensation on phenylphosphonic dichloride and 4,4'-diaminodiphenylmethane under Phi-Phi stacking interaction, and the composite material of the core-shell structure is formed. The preparation method provided by the invention has the advantages that structure and properties of the carbon nano tube can not be damaged, reaction conditions are mild, requirements on equipment are low, less waste is produced, and the prepared composite material can be taken as a novel polymeric flame retardant.

The invention relates to a flame-retardant rigid polyurethane foaming plastic composite material and a preparation method thereof. The flame-retardant rigid polyurethane foaming plastic composite material is prepared from the following raw materials in parts by weight: 27-40 parts of modified nanometer magnesium hydrate, 10-13 parts of microencapsulation red phosphorus, 30-50 parts of polypropylene oxide, 30-45 parts of isocyanate, 5-15 parts of foaming agent and 0.5-2 parts of dibutyltin dilaurate. Through synergism of the inorganic particle nanometer magnesium hydrate and the microencapsulation red phosphorus, the flame resistance of the composite material is improved, the oxygen index of the composite material is improved to 31%, the horizontal firing level of the composite material reaches HB40, and the vertical firing level of the composite material reaches V-0.

The invention relates to a flame-retardant plasticizer tribromophenoxychloropropoxytri(chloropropyl) silicate compound with synergic flame retardance of silicon, chlorine and bromine and a preparation method thereof. The compound has the structural formula shown in the specification. The preparation method comprises the following steps of: at 20 DEG C, dropwise adding the organic solvent solution of tribromophenylepoxypropyl ester into silicon tetrachloride with an equal molar ratio; keeping the temperature at 60-80 DEG C and reacting for 4-6 hours; cooling to 35 DEG C; dropwise adding epoxypropane with a certain molar ratio; keeping the temperature at 50-70 DEG C and reacting for 3-5 hours; and purifying to obtain light yellow liquid tribromophenoxychloropropoxytri(chloropropyl) silicate. The compound is suitable to be used as a flame-retardant plasticizer of polyvinyl chloride, polyurethane, epoxy resin, unsaturated resin and the like; and the production technology is simple, the equipment investment is low, the cost is low, and the industrial production is easy to realize.

A flame-retarding nano-class composite mother material is an epoxy phenolic resin-organic montmovillonite material. Its preparing process features that the silane coupling agent is used to make the epoxy phenolic resin come between layers of the long-chain alkyl ammonium salt modified Na-base montmorillonite. It can be matched with organic phosphate to prepare flame-retarding plastics.