672results about How to "High oxygen index" patented technology

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

The invention discloses a method for preparing a reaction type transparent halogen-free flame retardation unsaturated polyester. A program temperature control melting polycondensation reaction method is adopted; C2-6 dihydric alcohol, C3-8 saturated binary acid or anhydride, C4 unsaturated binary acid or anhydride, and a difunctional reactivity phosphatic flame retardant are used to synthesize an unsaturated polyester oligomer; styrene is taken as a crosslinking agent to prepare the unsaturated polyester which can be solidified at room temperature with transparent appearance, moderate viscosity and lower cost. After solidification, no added dissociated flame retardant component is contained in the cross linked network of the unsaturated polyester. The mechanical property, the flame retardation property and the electricity property of the product can be stable in a long period, the oxygen index of the product can be increased from 19 to 29 percent, and the product can pass the vertical firing UL94-V0 level. The reaction type transparent halogen-free flame retardation unsaturated polyester can be applied to the field of electronic and electric appliance insulating materials with higher performance requirements, construction flame retardation coating, ship-building material, flame retardation fiber glass reinforced plastics, and the like.

The invention discloses a shielding longitudinal watertight degaussing cable and a production method thereof for ships. A tinned copper wire is impregnated with a sealant and then twisted into a twisted copper conductor which is impregnated with a conductor sealant layer on the periphery, an electro-insulating rubber layer is extruded on the periphery of the conductor sealant layer to form insulation core wires, chloroprene rubber filling bars are filled into gaps between the insulation core wires, and a plurality of insulation core wires are twisted wholly into a cable core. A cable core inner sealant layer, an inner jacket rubber layer, an armor shielding layer and an outer jacket rubber layer are sequentially arranged on the periphery of the cable core. A single wire of the cable conductor is impregnated with the sealant, the twisted copper conductor is impregnated with the conductor sealant layer on the periphery, the cable core inner sealant layer is extruded on the periphery of the cable core to form multiple sealing, the chloroprene rubber filling bars swell during follow-up vulcanization and can fill in the gaps inside the cable core completely, and tangency between the insulation core wires can be avoided, so that the sealant can permeate to the inside of the cable core to guarantee the watertight effect when the cable core inner sealant layer is extruded.

The invention provides a high flame retardancy type soft foam plastic insulation product and a preparation method thereof. The product comprises the following components in parts by weight: 12 to 15 parts of nitrile rubber, 8 to 10 parts of talcum powder, 0.5 to 0.8 parts of polyethylene glycol, 0.2 to 0.4 parts of antiager 4020, 15 to 20 parts of chlorinated paraffin, 0.6 to 0.9 parts of paraffin, 1 to 2 parts of epoxidized soybean oil, 0.1 to 0.3 parts of antiager RD, 0.4 to 0.7 parts of carbon black, 7 to 10 parts of polrvinyl chloride, 26 to 36 parts of fire retardant based on the total amount, 2 to 5 parts of dioctyl ester, 8 to 12 parts of azodicarbonamide, 0.2 to 0.5 parts of stearic acid, 0.4 to 0.7 parts of zinc oxide, 0.4 to 0.7 parts of sulphur, and 1.3 to 1.8 parts of accelerant based on the total amount. By adopting the high flame retardancy type soft foam plastic insulation product, the technical problem that the oxygen index and the smoke density are mutually conflicted in the technological manufacture is solved, and the bottleneck due to mutual limitation is broken through.

The invention relates to an aluminium hydroxide composite anti-flaming density fiber board and a preparation method thereof; according to the prepared anti-flaming density fiber board, the needed characteristic substances are as follows by mass parts: 100 parts of wood fiber, 20-30 parts of aluminium hydroxide, 0-10 parts of flame retardant synergists, 1-3 parts of coupling agents, 12-18 parts of adhesives, 1-3 parts of curing agents and 1-3 parts of waterproof agents; the composite flame retardant has low cost and no precipitation and is environmental-friendly and has no toxicity, and has good anti-flaming effect on density fiber board, oxygen index can each 36 percent and the vertical burning level is UL-94V-0.

The invention relates to a macromolecular intumescent flame retardant with phosphorus and nitrogen, which is characterized in that: the chemical composition is poly (2, 6 and 7-trioxy-1-phosphorous dicyclic-[2, 2 and 2]-octane-1-anisyl) organic phosphate 4 and 4'-diaminodiphenylmethane; the preparation process is that: 2, 6 and 7-trioxy-1-phosphorous dicyclic-[2, 2 and 2]-octane-1-anisyl is put into the solvent of acetonitrile and dissolved after heating and stirring, and then diamine compound and catalyst are added into the solution, and a temperature reaction is processed under the protection of nitrogen; the solution is filtered when reaction is over to obtain the filter mass after being rinsed and dried. The macromolecular intumescent flame retardant with phosphorus and nitrogen has the advantages of being halogen-free and environment-friendly, big molecular weight, basically solving transplantation, separation, volatilization or other problems on the machineshaping of the flame retardant and the polymer substrate, simple preparation method and operation and higher productive rate of the product.

The invention discloses a silsesquioxane cross-linked silicon nitrogen phosphor synergic anti-flaming water-borne epoxy resin and a preparation method thereof. The water-borne epoxy resin is prepared from 40-80wt% of epoxy resin base stock, 2-12wt% of silicon nitrogen phosphor containing silsesquioxane epoxy resin curing agent, 0.5-2wt% of curing accelerator, 5-20wt% of foaming agent, 5-20wt% of charring agent, 3-20% of charring catalyst, 2-12wt% of pigment filler and 0.1-2.5wt% of flatting agent, and the sum of the content of the components is 100%. According to the invention, the silicon nitrogen phosphor containing silsesquioxane epoxy resin curing agent is taken as a curing agent and is synergic with the charring agent, the foaming agent and the charring catalyst so as to obviously improve the flame retardant property of the water-borne epoxy resin; the acquired water-borne epoxy resin has high bonding force with the metal surface, has high heat resistance and has an oxygen index of above 32; the preparation method is simple, safe and low-cost; the water-borne epoxy resin has an excellent application prospect.

The invention discloses a flame-retardant anti-dripping resin compound, consisting of 100 weight portions of thermoplastic resin, 0.01-5 weight portions of modified polytetrafluoroethylene anti-dripping agents and 20 to 40 weight portions of environment-friendly flame retardant containing phosphorus and/or nitrogen. The resin compound has strong anti-dripping effect and heat resisting performance, is level and smooth in exterior appearance, and can endow polyester fiber products with excellent enduring flame retardancy without using halogen (Cl and Br) flame retardant. The resin compound has the advantages of high oxygen index, droplet resistance, low heat release rate, no halogen, little toxicity, low smoke dust emission, little influence on the mechanical properties of base materials, etc.

The invention discloses a phase-change polyurethane foam and a preparation method thereof. The foam is prepared by subjecting a polyurethane foam raw material to processes of reacting, foaming, and curing; wherein the polyurethane foam raw material comprises polyether, polymethylene polyphenyl isocyanate, silicone oil, and methyl chloride; the reactions are carrier out after the mixing of a phase-change energy-storage microcapsule and the polyurethane foam raw material, the phase-change energy-storage microcapsule is composed of a capsule wall made of polyurethane-polysiloxane and a capsule core made of an organic phase-change material, and polycarbodiimide is taken as the cross-linking agent. The phase-change energy-storage microcapsule integrates the advantages of organic materials and inorganic materials together, namely has the organic materials' advantages of flexibility and elasticity, also has the inorganic materials' advantages of excellent mechanical performance and fire-retardant performance, and overcomes the shortage of easy separation between the conventional microcapsule and the foam substrate.

The invention relates to a preparation method of a tunnel asphalt surface layer material. A preparation method for damping porous noise-reducing tunnel asphalt pavement material is characterized in that it comprises the following steps: 1) preparation of high-viscosity and high-elasticity modified asphalt: base asphalt according to the mass ratio of each component: modifier SBS : Activated rubber powder: Viscosifying compatibilizer: Antioxidant: Stabilizer=100: 6.0~18.3: 20.2~45.7: 1.2~3.7: 0.2~1.4: 0.4~1.9, select; obtain high viscosity and high elasticity modification Asphalt; 2) Add flame retardant to high-viscosity and high-elasticity modified asphalt, heat and melt high-viscosity and high-elasticity modified asphalt to add flame retardant, stir for 3-9 minutes, and stand at 150-170°C for 15-30 minutes to obtain Flame-retardant high-viscosity high-elasticity modified asphalt; 3) according to the mass ratio, mineral material: flame-retardant high-viscosity high-elasticity modified asphalt: fiber stabilizer = 100: 3.6~5.2: 0.1~0.4, choose; noise tunnel asphalt surface material. The invention has the functions of noise reduction, flame retardancy and anti-skid.

The invention discloses a kind of non-halogen inflating fire-retarding polyolefine composition, which includes 50 - 90 weight shares of thermosplasticity polyolefine basic material and 10 - 50 weight shares of non-halogen inflating fire retarder. The non-halogen inflating fire retarder is comprised of non-halogen charcoal becoming fire retarder, non-halogen nitrous fire retarder and APP, weight proportions of which are 1 - 6 : 0.5 - 2 : 0.5 - 2. The compound has high oxygen index, melting drops resistance, low heat emitting velocity, no halogen, low toxicity, low smoke emission and small effect to dynam performance of basic material. It can be used in various fire retarding fields, and is especially suitable to be used in electrical wire cable, communications cable, shipping and auto industries.

The invention adopts organic cation intercalator and coupling agent to carry out organification intercalation processing on laminated clay silicate, so as to prepare organification laminated clay silicate and mix the silicate with liquated road asphalt to form the modified asphalt. The invention also relates to the preparation process of the modified asphalt. The modified asphalt of the invention not only has better road performance than that of matrix asphalt but also prevents premature failure of asphalt road surface and lengthens service life of the road surface; in addition, the cost of materials and processing devices is far lower than the cost of polymer nano modified asphalt.

The invention discloses a preparation method of expansible graphite modified high-flame-retardant rigid polyurethane foam. The preparation method includes the steps that firstly, white materials are prepared, wherein polyester polyol, polyether polyol, structural flame retardant polyether polyol, foam homogenizing agents, liquid fire retardant, fermentation catalysts, gel type catalysts, trimerization catalysts and water are evenly mixed, then graphite is added, foaming agents are added to the evenly mixed mixture, and the white materials are obtained; the prepared white materials are mixed with black materials according to the mass ratio of 1:1.5-1.8, the mixture is stirred and injected into a constant-temperature die for foam aging, and the rigid polyurethane foam is obtained, wherein the black materials are polyisocyanates. By means of the preparation method of the expansible graphite modified high-flame-retardant rigid polyurethane foam, the oxygen index of the rigid polyurethane foam is raised, the combustion performance can reach the non-combustible level, the mechanical strength and size stability are good, and the heat conductivity coefficient is low; compared with a similar product in the market, a great price advantage is achieved, and machining and forming are easy; the added fire retardant is free of volatility, not prone to being separated out, low in toxicity and durable in flame retardant effect.

The invention discloses auxiliary-addition-free polyphenylene sulfide resin industrial synthetic process. The formula of raw materials required in the auxiliary-addition-free polyphenylene sulfide resin industrial synthetic process is as follows: the mole ratio of sodium sulfide to sodium hydroxide to santochlor to N-methyl-2-pyrrolidinone is 0.93-1.15 to 1.00-1.28 to 1.98-2.98 to 1.18 to 1.48. The industrial synthetic process mainly comprises the following steps: firstly, in a sodium hydrosulfide dehydration treatment stage, a pipeline filter is adopted to filtrate a sodium hydrosulfide solution to treat mechanical impurities in the solution, then a sodium hydroxide solution with the concentration 84 mol percent is added in the formula for chemical treatment on the sodium hydrosulfide; secondly, in the condensation polymerization stage, anaerobic deionized water is added to further appropriately adjust the molecular weight and molecular weight distribution coefficient of synthesized polyphenylene sulfide resin; thirdly, deionized water is adopted for repeatedly scrubbing for 3 to 6 times, and finally, the target product of the auxiliary-addition-free polyphenylene sulfide resin industrial synthetic process provided by the invention is obtained. The resin in the obtained product of the auxiliary-addition-free polyphenylene sulfide resin industrial synthetic process is low in polydispersity index and high in oxygen index, and has an excellent electrical insulation property.

The invention relates to a sheath material and a preparation method thereof and provides a microwave induced intumescent flame-retardant silane crosslinked polyolefin sheath material for cables and a preparation method thereof for solving such technical problems in the existing preparation method of flame-retardant silane crosslinked sheath materials as long-time boiling with water is required, the stability and flame retardant effect of the product are poor. The material is prepared from a polyolefin resin, an intumescent flame retardant, a silane coupling agent, a microwave absorbent, a water bringing agent, a polyfunctional group crosslinking agent, a crosslinking accelerant and an antioxidant. The preparation method comprises the steps of carrying out melt mixing on the polyolefin resin, the intumescent flame retardant, the silane coupling agent, the microwave absorbent, the water bringing agent, the polyfunctional group crosslinking agent, the crosslinking accelerant and the antioxidant, carrying out granulation and tabletting, then carrying out microwave induced crosslinking and putting the product at room temperature, thus preparing the material. The mechanical property of the material prepared by the preparation method is obviously increased, the tensile strength is improved by nearly 20% and the oxygen index is improved by more than 70%. The material and the preparation method belong to the field of preparation of polyolefin sheath materials.

The invention discloses a low-smoke density additive-type flame retardant resin which comprises 45-70 parts of unsaturated polyester resins by mass, 0.5-10 parts of mixtures of fumed silica and bentonite by mass, 4-8 parts of zinc borate by mass, 5-30 parts of aluminum hydroxide by mass and 5-30 parts of ammonium polyphosphate flame retardants by mass. The ammonium polyphosphate, the zinc borate and the aluminum hydroxide are combined and added to the unsaturated polyester resins to prepare the low-smoke density additive-type flame retardant resin which has the characteristics of low smoke density during burning, good mechanical performance and the like. Through the synergistic effect of the fumed silica and the bentonite, resin settlement can be prevented and the storage stability of the resin can be improved. The low-smoke density additive-type flame retardant resin provided by the invention is mainly applicable to the fields such as traffic vehicles, buildings, shipbuilding, chemical equipment, electronics, sports equipment, daily equipment and the like.

The invention discloses a highly flame-resistant external wall heat preservation material and a process for producing the same, which are mainly used for the construction of isolation belts and the heat preservation of high-rise buildings and building bodies with relatively higher requirement on fire-protection rating. According to the process, the highly flame-resistant external wall heat preservation material is produced by taking modified phenol aldehyde resin with low hydroxyl content as a raw material and performing low-acid curing on the modified phenol aldehyde resin. The modified phenol aldehyde resin with the low hydroxyl content is prepared by heating phenol, formaldehyde, a modifier and chopped glass fiber firstly under an acidic condition and then under an alkali condition and then performing copolymerization and condensation on the phenol, the formaldehyde, the modifier and the chopped glass fiber. The modified phenol aldehyde resin with the low hydroxyl content, a surfactant, a gas foaming agent, a modified moisture repel and an organic acid catalytic system are cured and molded on a continuous line. The highly flame-resistant external wall heat preservation material has the following advantages that: a terminal hydroxyl group of the adopted phenol aldehyde resin is closed, so the water absorbing capacity of the material is reduced; the cured molding material has high strength and low acidity; the service life of the material is prolonged and simultaneously convenience is provided for construction; the highly flame-resistant external wall heat preservation material has excellent flame resistance, lower smoke density and a higher oxygen index; and fire protecting safety property in a construction and use process is greatly improved due to the non-smoldering property of the highly flame-resistant external wall heat preservation material.

The invention relates to the technical field of a solid buoyancy material used in a marine environment and specifically to a flame retardant solid buoyancy material and a preparation method thereof. The flame retardant solid buoyancy material comprises, by mass, 100 parts of an epoxy resin, 15 to 30 parts of a halogen-containing fire retardant, 7 to 15 parts of an inorganic fire retardant, 12 to 20 parts of an active flame retardant diluent, 1 to 4 parts of a foaming agent, 0.15 to 0.3 part of a wetting dispersant, 0.5 to 1 part of an accelerator, 90 to 130 parts of a curing agent and 20 to 150 parts of hollow glass beads. The flame retardant solid buoyancy material provided in the invention has the characteristic of flame retardation, can be used in deep sea, is free of loss of net buoyancy and is processable.

The invention relates to a modified polyurethane rigid foam material and a preparation method thereof. The method comprises the following steps of: selecting an isocyanate liquid state material as a black material, selecting a polyether polyol liquid state material or a combined liquid state material of polyether polyol and polyester polyol as a white material, and mixing inorganic powder in the black material or mixing the inorganic powder in the white material or mixing the inorganic powder in the black material and the white material simultaneously; mixing the black material and the white material which are mixed with the inorganic powder; and performing polymerization reaction of the mixture in a mode of injecting the mixture into a die or a mode of foaming freely to obtain the modified polyurethane rigid foam material. According to the modified polyurethane rigid foam material, isocyanate and the polyether polyol or the combined material of the polyether polyol and the polyester polyol are mixed with the inorganic powder of different types; after the inorganic powder is mixed with polyurethane raw materials, the expression of the inorganic powder is stable, and a cell structure of polyurethane rigid foam is not destroyed after reaction is finished, so that oxygen indexes and combustion residual amount which are directly relevant with combustion resistance are improved obviously, and the hardness of the material is improved.

A heat-resisting thermoplastic halogen-free low-smoke flame retardant polyolefin plastic for wire and cable belongs to the technical field of insulation or sheath material for wire and cable in industrial high molecular material. The polyolefin plastic is composed of the following raw materials by weight: 20-60 parts of an ethylene vinyl acetate copolymer, 5-20 parts of polyethylene, 20-50 parts of a propylene based elastomer, 10-30 parts of a polymer compatibilizer, 120-160 parts of a flame retardant, 2-6 parts of a flame retardant synergistic agent, 0.8-2 parts of an antioxidant and 0.5-3 parts of a lubricant. The invention has the following advantages: the polyolefin plastic has excellent heat deformation resistance and heat aging resistance, and can meet the property requirements of wire and cable insulation and sheath material with usage temperature at 90-105 DEG C; and the polyolefin plastic gains better compatibility and crack resistance, has good flexibility, avoids the problem of thermal stress cracking, and can improve the flame retardant performance and oxygen index of flame retardant materials.

The invention relates to a material for reinforcement of coal and rock and a preparation process and application thereof. In the technical scheme, resol, a plasticizer, fire-resistance polyether and methanol are used as raw materials and are heated under alkaline conditions to form modified phenolic resin with an inter-penetrating structure through copolymerization and condensation, the modified phenolic resin is then mixed with an organic acid catalyst system by a pump, and the mixture is then poured into a broken coal and rock to be cured and to be closely combined with the coal and rock. The preparation process comprises preparation of the modified phenolic and preparation of the coal and rock curing material. The modified phenolic resin has low viscosity and can infiltrate into tiny cracks. The cured phenolic material has excellent bounding capacity and can achieve strong viscosity with the formation. Due to the excellent flexibility properties, the material can withstand the subsequent formation movement without retardant fire, thereby improving the safety of underground operation. Moreover, the material can not affect the mineability of coal, and can be easily planed and cut, thereby realizing the easy breakage of large coal lumps bonded together.

The invention discloses a method for preparing a fire retardant modification timber. The method comprises the following steps of: (1) adding a fire retardant into a urea formaldehyde resin concentrate to obtain a timber impregnation liquid after the fire retardant is completely dissolved; (2) making the impregnation treatment of the timber to be treated by using the vacuum pressure method and the timber impregnation liquid obtained in the step (1); and (3) drying the timber to be treated to obtain the fire retardant modification timber. In the method, the fire retardant is directly added into the urea formaldehyde resin concentrate to form the impregnation liquid, so that by one-time impregnation treatment, the use performance of the timber is improved, the fire retardant effect is enhanced, the process for modifying the timber is simplified, and other steps which are needed after the timber modification to realize the fire retardant function are saved. The method has the advantages of simple process and unnecessary complex equipment; and when the method is adopted to treat the timber, the size stability of the treated timber is obviously improved, the physical and mechanical properties are obviously improved, the weight gain rate of the timber is between 25 and 50 percent, and the oxygen index is increased by 40 to 80 percent.