244results about How to "Low smoke" patented technology

The invention relates to a synthetic material, in particular to a halogen-free flame retardant high impact polystyrene blend and a preparation method thereof. The high impact polystyrene blend comprises high impact polystyrene resin with the mass percent of 35-75%, an inorganic flame retardant with the mass percent of 7-45%, an intumescent flame retardant with the mass percent of 5-20%, a flame retardant synergist with the mass percent of 1-5%, a toughening agent with the mass percent of 10-20%, a coupling agent with the mass percent of 0.5-2.0%, a lubricant with the mass percent of 0.5-3.0% and an antioxidant with the mass percent of 0.2-3.0%. The halogen-free flame retardant high impact polystyrene blend is produced by high-speed premixing and extrusion prilling, and has the advantages of environmental protection, flame retardation, low smoke, weather resistance, good thermal stability and mechanical property, easy machine shaping, etc.

A fiber-optic cable for applications subject to extreme temperatures and high crushing and bending forces incorporating a loose fluoropolymer buffer material, a aramid/fiberglass strength member, and a fluoropolymer outer jacket compromising low smoke, low toxicity, and low flammability when exposed to flame.

The invention discloses an energy-saving insulated flame-retardant water-proof corrosion-proof functional coating and a preparation method thereof. The functional coating is prepared from the following raw materials: an aqueous polyurethane dispersion, a flame retardant, a flame-retardant antismoke agent, a hollow glass bead, a wetting dispersant, an anti-settling agent, a thickening agent, water, a leveling agent and a de-foaming agent, has the functions of heat preservation, flame retarding, water prevention and corrosion resistance and the like, is unlikely to become yellow when in use, is safe and reliable, is excellent in performance, is good in compatibility with pigment dyestuff, is unlikely to damage the coated surface, is easy to modify, is nontoxic, is safe to use, does not pollute environment and is suitable for the fields of inner and outer wall coating, pipeline coating, wood furniture coating, decoration coating, chemical corrosion-proof coating and the like.

The invention discloses a process for preparing acicular, flake nano single crystal magnesia-alumina hydrotalcite Mg6Al2(OH)16C.4H2O, and the prepared Mg6Al2(OH)16CO3.4H2O is used as a flame retardant of power electronic devices. Acicular components comprise 0.06-1.41 mol/L crystal magnesium chloride, 0.02-0.47 mol/L aluminum salt, 0.3-4.5 mol/L sodium hydroxide and 0.094-1.368 mol/L sodium carbonate, and flake components are added with modifier basing on the above components. The invention has the process steps that the crystal magnesium chloride and the sodium hydroxide are firstly dissolved in deionized water and heated and stirred, and then the aluminum salt and sodium carbonate are added into the solution, the deionized water and the sodium hydroxide are added every 20 minutes during reaction, the time of reaction is 0.5-2 hours, and the solution is cooled until room temperature and is washed, filtered and dried. The crystal morphology of the prepared acicular nano single crystal magnesia-alumina hydrotalcite is that the diameter is 10-20 nanometer, the length is 60-130 nanometer, the diameter is 25-80 nanometer, and the length is 200-500 nanometer. The crystal morphology of the flake nano single crystal magnesia-alumina hydrotalcite is that the thickness is 10-20 nanometer, the diameter is 50-100 nanometer, the thickness is 20-30 nanometer, and the diameter is 60-200 nanometer. The process for preparation of the invention has short period and simple process, is prepared at atmospheric pressure, and is suitable for industrial production.

The invention discloses a protective sealing door for an underground refuge chamber. The protective sealing door comprises a door frame and a door plate, wherein the door plate is arranged on the door frame through a rotation shaft; a locking mechanism for locking the door plate on the door frame is arranged on the door plate, a plurality of first reinforcing ribs for reinforcing the strength of the door plate are arranged in the door plate; heat-insulating materials, namely aerogel heat-insulating felts are filled among the reinforcing ribs; at least two annular sealing rings, namely flame-resisting sealing rings are arranged at the joint of the door plate and the door frame; and the periphery of the door plate is locked by the locking mechanism. According to the protective sealing door, the aerogel heat-insulating felts which can bear the temperature of 1,400 DEG C to the maximum are filled in the door plate, so that the door plate can resist high temperature generated during explosion, and the high temperature is insulated out of the refuge chamber; at least two sealing rings which are made of flame-resisting, anti-static, high temperature-resisting and oil-resisting materials are arranged on the contact surface of the door plate and the door frame, so that the protective sealing door has a good sealing effect.

Castable propellant formulations are provided including reduced toxicity ballistic modifiers that do not adversely increase the sensitivity of the propellant to shock detonation. Failure to adequately control the propellant burn rate often results in unacceptable performance of the propellant. Carbon can act as an effective ballistic, but not to the extent of metal compounds. It has been found that pasting a ballistic modifier, including ballistic modifiers containing lead, in an inert polymer modifies the burn rate of propellants while allowing the use of a reduced amount of modifier to achieve the same desired burn rate modification as the prior art, and therefore creating reduced shortcomings associated with the ballistic modifiers. Accordingly, the use of from about 1% to about 6% burn rate modifier wherein the burn rate modifier includes a ballistic modifier pasted in an inert polymer is taught as an effective burn rate modifier in a propellant, in order to provide reduced toxicity means for modifying the propellant burn rate without increasing the sensitivity of the propellant to shock detonation.

The invention relates to halogen free phosphorous-nitrogen synergic antiflaming water-soluble polyurethane fabric coating agent and a preparation method thereof, belonging to the technical field of light industry. The coating agent comprises diisocyanate, non-antiflaming polyalcohol, reactive type phosphorous-nitrogen series polyalcohol, hydrophilic chain extender and neutralizing agent. The diisocyanate, non-antiflaming polyalcohol, reactive type phosphorous-nitrogen series polyalcohol and hydrophilic chain extender are added into a kettle, and reaction is carried out, thus obtaining prepolymer; then the prepolymer is added into aqueous solution containing neutralizing agent, emulsification neutralization is carried out in high speed emulsification equipment, and then rotary evaporation is carried out to remove solvent, thus obtaining target product. The invention has the characteristics of environmental protection, no toxicity, low smoke, phosphorous-nitrogen synergic antiflaming and obvious antiflaming effect; the antiflaming water-soluble polyurethane fabric coating agent is adopted for finishing fabric, coating is transparent and unsticky, handfeel of fabric is not influenced, and soaping resistance can be realized, thus passing level B1 in GB/T5455-1997 textile-burning behaviour-vertical method.

The invention provides a preparation method of a steel structure fireproof paint by taking expanded and vitrified small ball as a base material, which is characterized in that on the basis of a traditional organic inorganic clad steel structure fireproof paint, and expanded and vitrified small ball and phenolic resin are used for obtaining the steel structure fireproof paint with excellent performance. According to the invention, expanded and vitrified small ball in the inorganic component replace a traditional lightweight aggregate, thereby the paint has the advantages of low density, high strength, stable physical and chemical performance, and has excellent performances of aging resistance and weatherability, heat insulation, fire resistance, sound insulation and insulation; phenolic resins can replace a traditional film forming agent in the organic component, no fire retardant is applied, so that the coating has the advantages of difficult combustion, good heat stability, low smoke, low toxicity, high mechanical strength, and strong anti-corrosion capability and weather resistance. The paint overcomes the disadvantages of poor flame resistance and toxic flue gas release due to thermal decomposition of the common organic resin.

The present invention relates to a nano-Mg-Al hydrotalcite fire-retardant EVA foaming material comprising, by weight, 60-90 parts of an ethylene-vinyl acetate copolymer with 10-22wt% of VA, 2-10 parts of a foaming agent, 0.5-1 part of a foaming accelerator, 0.3-5 parts of a coupling agent, 0.5-1 part of a crosslinking agent, 10-50 parts of a flame retardant and 0.5-2 parts of a releasing agent, and the flame retardant is nano-Mg-Al hydrotalcite. Compared with traditional metal hydroxide flame retardants, the nano-Mg-Al hydrotalcite has great advantages in improvement of the limiting oxygen index, improvement of vertical combustion performances and reduction of heat release rate and other flame retardant aspects, and is better fire-retardant inhibitor. The present invention also provides a preparation method of the foaming material, and the method is simple to operate, the foaming process is not needed to be further modified or changed, production cost can be reduced, and energy can be saved.

The invention provides a high-temperature resistant wear-resistant irradiation cross-linked regenerated-polyolefin/nano-magnesium-hydroxide halogen-free flame-retardant environmental-friendly cable material with high electric properties. The cable material is used for products comprising power cables, mine cables, marine cables, electric equipment lines, locomotive and vehicle cables, and the like. The cable material is produced from following raw materials by weight: 30-40 parts of a regenerated polyolefin, 40-50 parts of a compatilizer, 15-20 parts of an ethylene-propylene-diene monomer (EPDM), 120-150 parts of a nano flame retardant, 3-5 parts of an antismoke agent, 3-3.5 parts of a sensitizer, 1-2 parts of a coupling agent, 1.0-1.5 parts of an antioxidant, 1.5-2 parts of a lubricant and 0.8-2.5 parts of a colorant. According to the cable material and the production method, waste and old plastics are used as the raw materials and an irradiation cross-linking technology and an nano new material are employed, and therefore the cable material has good comprehensive performances comprising high-temperature resistance, wear resistance, high electric properties, oil resistance, high strength, less smoke, no halogen, high flame retardance, good fluidity, etc., and the environmental performance of the cable material meets the requirements of electric wires and cables.

A low smoke, low toxicity fiber optic cable that provides an intermediate surface that facilitates bonding to optical connectors such as LC connectors, is provided. In a preferred embodiment, the inventive cable exhibits improved dimensional stability by minimizing or eliminating shrinkage stress on the optic fiber core.

The invention provides a flame-retardant polyethylene cable material capable of preventing mould. The flame-retardant polyethylene cable material is prepared with the following components and raw materials by weight: 50-60 parts of high-density polyethylene, 30-45 parts of linear low-density polyethylene, 10-15 parts of polyester resin, 8-10 parts of organic silicon resin, 2-3 parts of simethicone, 1-2 parts of zinc oxide, 5-10 parts of wollastonite powder, 1-2 parts of barium sulfate, 5-6 parts of dolomite, 6-8 parts of attapulgite, 4-6 parts of celestite, 10-12 parts of zinc hydroxide, 10-15 parts of triammonium phosphate, 10-12 parts of tricresyl phosphate (TCP), 6-8 parts of poly(1,2-propylene glycol adipate), 1-2 parts of sophora flavescens alcohol extract, 0.5-0.6 parts of zanthoxylum oil, 1-2 parts of OBPA (10,10'-oxybisphenoxarsine) mould inhibitor, 1-1.5 parts of PVC (polyvinyl chloride) processing agent ACR-401 (acrylate plastic modifier), and 10-15 parts of modified filler. The cable wire has good antibacterial property, and the characteristics of weather resistance, low smoke, ageing resistance, flame retardation and so on.

The invention discloses an optical-fiber composite low-voltage intelligent cable used in coal mine. The optical-fiber composite low-voltage intelligent cable comprises: an insulation core, a fiber unit and a control cable unit. The cable is characterized in that: rubber strip fillers are filled in gaps between the insulation core, the fiber unit and the control cable unit; a taped covering, a fire protection layer and an over sheath are successively arranged out of the insulation core, the fiber unit, the control cable unit and the rubber strip fillers. The optical-fiber composite low-voltageintelligent cable of the invention has good fireproof performance, a mechanical property, an insulating property, a flame retardant property and an acid-resisting/alkali-resisting anticorrosion performance, and possesses low costs and a fiber communication function.

The invention discloses reaction-type flame-retardant glycol containing a phenyl phosphate-based symmetrical structure and a preparation method thereof. The preparation method is characterized by comprising the following steps: reacting phenyl dichlorophosphate with dihydric alcohol in a tetrahydrofuran or ethyl acetate solution in the presence of triethylamine, placing the tetrahydrofuran or ethyl acetate solution of dihydric alcohol and triethylamine into an ice-water bath, stirring and dropwise adding the tetrahydrofuran or ethyl acetate solution of phenyl dichlorophosphate; and filtering a precipitate and then removing the solvent in the filtrate to obtain the product with a structural general formula specified in the description, wherein n is an integer ranging from 2 to 6. According to the preparation method disclosed by the invention, micromolecular dihydric alcohol is introduced in the phenyl dichlorophosphate group in a manner of chemical bonding, so that the obtained dihydric alcohol molecular structure contains both the phenyl dichlorophosphate group and two hydroxyl groups with symmetrical structures and same reaction activity, and can partially or completely replace the micromolecular dihydric alcohol without a flame-retardant characteristic, so that the prepared polymer material has a flame-retardant characteristic; the raw materials in the preparation method disclosed by the invention are easily available, synthesis and post-treatment processes are simple, the cost is low, and the yield can achieve more than 90%.

The invention discloses a production method of flame-retardant modified wood. The method comprises the following steps: 1, firstly, preparing a flame retardant and then adding the flame retardant into modified urea resin liquid to ensure that a mixture is completely dissolved to prepare wood impregnation liquid; 2, performing waiting treatment by using the wood impregnation liquid obtained in the step 1 by means of vacuum pressurization; and 3, drying to obtain the modified wood. The production process is simple, and the treating liquid can be recycled, so that the size stability of the wood subjected to the treatment is obviously improved, the physical and mechanical property can be obviously improved, the weight grain rate of the wood is 20-43 percent, the oxygen index can be improved by 30-70 percent, and the flame retardant performance of the wood can be kept for a long time.

The present invention provides a tackifier that is a raw material of an adherence adhesive having good adhesion performance (in particular, holding power) for all members and can be used for various adherence adhesives, and a tackifier emulsion capable of being used for various aqueous adherence adhesives. The tackifier and the tackifier emulsion including a rosin resin wherein a ratio of the content of a component with a molecular weight of at most 300 comprised in the rosin resin to the softening point of the rosin resin (the content (% by weight) of a component with a molecular weight of at most 300/softening point (K)) is at most 0.004; and the adherence adhesive composition including the tackifier; and the aqueous adherence adhesive composition including the tackifier emulsion.

Disclosed is a flame-retardant thermoplastic resin composition which maintains high flame retardancy without containing a halogen, and is free from problems of conventional non-halogen flame-retardant thermoplastic resin compositions. This flame-retardant thermoplastic resin composition is flexible and highly heat-resistant, while having good terminal workability, scratch whitening resistance, mechanical strength, moldability and excellent discoloration resistance. Specifically disclosed is a flame-retardant thermoplastic resin composition which is obtained by blending 50-300 parts by weight of a metal hydroxide (Y) per 100 parts by weight of a thermoplastic resin composition (X) containing 25-90% by weight of a polyethylene resin (a), 1-20% by weight of a polypropylene resin (b), 5-39% by weight of a styrene thermoplastic elastomer (c) and 4-40% by weight of a mineral oil-based rubber softener (d). This flame-retardant thermoplastic resin composition is characterized in that at least a part of the polyethylene resin (a) is composed of an ethylene-vinyl acetate copolymer (EVA), and the ethylene-vinyl acetate copolymer content is 40-80% by weight relative to 100% by weight of the thermoplastic resin composition (X).

The invention relates to a preparation method of halogen-free, flame-retardant, low-smoke and low-toxin hot melt phenolic prepreg. The solid content and the viscosity-temperature flow characteristic of phenolic resin are controlled with a reasonable synthesis process; solid phenolic resin and liquid epoxy resin are mixed uniformly according to formula design, and a resin system suitable for preparation of prepreg with a hot melt process is obtained; the gelation time of the resin is controlled to range from 140 s to 250 s, a hot melt resin adhesive film is prepared from the hot melt phenolic resin system, the coating temperature is controlled to range from 40 DEG C to 65 DEG C, the hot melt phenolic resin adhesive film and unidirectional fiber or fiber fabric are composited under heating and pressurizing conditions, and the hot melt prepreg is prepared. The hot prepreg with uniform texture and stable resin content can be obtained through resin synthesis, formula design and process design, and the hot melt prepreg and the composite have the characteristics of low smoke, no halogen, low smog toxin and flame retardancy and can meet requirements for use performance of interior trimming and structural composites for high-seed railways, aircrafts, steamships and other transportation tools.

The invention relates to a ceramic fireproof fire-resistant silicon rubber wire and cable. The wire and cable comprise a plurality of conductors, each conductor is wrapped by a ceramic silicon rubber insulating layer in an extruding mode to form a wire core, multiple wire cores are wrapped by a wrapping tape layer to form a cable core, padding is arranged in the cable core, and a ceramic silicon rubber outer sheath is arranged outside the cable core. The ceramic fireproof fire-resistant silicon rubber wire and cable have characteristics batter than those of a common rubber cable and a flame retardant rubber cable and form a hard shell after being ablated by high-temperature flames to protect a burned article from being damaged, and the hard shell formed after ablation protects the wire and cable, so that unblocked electric power and communication are ensured, and precious time are won for personnel evacuation and rescue under the fire disaster condition.

The invention relates to a ship deep sea cable with the vertical watertight characteristic, which is provided with three to six conductors, each of which is composed of copper wires stranded with high conductivity, and the surface of each copper wire is coated with sealant. Each of the conductor is extruded with insulating layers. The sealant filled between the insulating layer and the periphery to compose the cable. An isolated area layer is wound at the periphery of the cable core; an outer sheath is extruded at the periphery of the isolated area layer, wherein the insulating layer is made of ethylene-propylene rubber materials. The sealant is the nonflowing sealing gluewater. The outer sheath is made of the chlorinated polyethylene materials. The invention provides a ship deep sea cable used in the deep water, particularly used in the sea with vertical watertight characteristic, and the sea water can not impregnate into the inner of the cable.