87results about How to "Reduce smoke production" patented technology

The invention discloses a high-strength environment-friendly flame-retarding fiberboard which comprises the following raw materials of plant fibers, flame retardants, adhesives and waterproofing agents, wherein the weight ratio of the plant fibers to the flame retardants to the adhesives to the waterproofing agents is 100:(3-30):(3-30):(0.1-4). The invention also discloses a manufacturing method of the high-strength environment-friendly flame-retarding fiberboard. Not only are the mechanical properties of the flame-retarding fiberboard obviously improved, but also the combustion property can conform to the regulations of GB8624 Class B or Class C, and the formaldehyde emission, the smoke volume produced and the smoke toxicity are also reduced. Thus, the high-strength environment-friendly flame-retarding fiberboard has good quality and low price, can be widely applied to the fields of building furnishings, flame-retarding furniture production, flame-retarding floor production, wooden fireproof door production, ship and vehicle furnishings and the like, and has good economical and social benefits.

A highly flame retardant plasticized polyvinyl chloride composition includes a mixture of a dialkyl or dialkenyl tetrahalophthalate and a brominated/chlorinated paraffin. The composition exhibits an absence of brittleness, and substantial flexibility at low temperatures. The composition can be used to form sheet materials, molding compositions, roofing materials, PVC formed jackets and insulation for wire and cable products.

The invention provides an environment-friendly fireproof material for electrical equipment and a preparation method of the environment-friendly fireproof material, and belongs to the fields of fireproof materials and preparation technologies thereof. The environment-friendly fireproof material for the electrical equipment is characterized by being prepared from the following raw materials in parts by weight: 50 to 60 parts of modified epoxy resin, 30 to 40 parts of fluorocarbon resin, 60 to 90 parts of a fire retardant, 3 to 10 parts of expanded graphite, 3 to 10 parts of alumina silicate fiber and 2 to 8 parts of molecular sieves. The fireproof material provided by the invention is applied to fire protection of the electrical equipment, and is high in crack resistance, water resistance and weather resistance and good in expansion character; meanwhile, the heat release rate of a base material in a burning condition can be obviously reduced, and the quality loss is reduced; moreover, the fireproof material is small in smoke production quantity and good in environmental protection effect.

The invention belongs to the technical field of fire retardants and mainly relates to a graphene grafted nitrogen, phosphorus and silicon synergistic halogen-free flame retardant and a preparation method thereof. The preparation method comprises the following steps: compounding 3-aminopropyl-triethoxysilane into octa-aminopropyl caged silsesquioxane through a hydrolytic condensation polymerizationprocess; preparing graphene oxide after chemically oxidizing and peeling graphene through an improved hummers process; compounding 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and graphene oxide into a grafted product 1 with an reactivity functional group through an in situ polymerization process; grafting the octa-aminopropyl caged silsesquioxane and the grafted product 1 into the graphenegrafted nitrogen, phosphorus and silicon synergistic halogen-free flame retardant through the in situ polymerization process. The preparation method for the graphene grafted nitrogen, phosphorus andsilicon synergistic halogen-free flame retardant provided by the invention has the advantages of simple preparation process, safety, environmental friendliness, and the like; the graphene grafted nitrogen, phosphorus and silicon synergistic halogen-free flame retardant can be widely used for inflaming retarding in the fields of electronics, automobiles, cables, packaging, aviation, and the like; the graphene grafted nitrogen, phosphorus and silicon synergistic halogen-free flame retardant has a bright application prospect.

The invention discloses premixed polyether polyol, polyisocyanurate foam, as well as a raw material composition and a preparation method of the polyisocyanurate foam. The premixed polyether polyol provided by the invention is prepared from the following components: polyether polyol A, polyester polyol A, a foam stabilizer, a trimer catalyzer, a foaming agent, water and a fire retardant; the foaming agent is a fluorinated hydrocarbon foaming agent; the fluorinated hydrocarbon foaming agent is 1,1,1,3,3-pentafluoropropane and/or 1,1,1,3,3-pentafluorobutane. Under the condition of not using an HCFC-141b foaming agent, the polyisocyanurate foam provided by the invention can reach the standards that the fire propagation index is less than or equal to 25 and the smoke increase index is less than or equal to 450, so that the polyisocyanurate foam provided by the invention meets the demands on inflaming retarding of thermal insulation materials used for high-rise buildings and corridors in National Fire Council Life Safety Act of America.

The invention discloses a low-smoke, halogen-free and flame-retardant cable material used for a coal mine. The low-smoke, halogen-free and flame-retardant cable material is prepared from the following raw materials by weight: 100 parts of a ethylene-vinyl acetate copolymer, 75 parts of high density polyethylene, 10-20 parts of a smoke-suppressing agent, 20-40 parts of a compatilizer, 250-300 parts of a flame retardant, 5-15 parts of flame-retardant aid, 7-10 parts of a processing aid, 3-6 parts of an oxidant and 3-6 parts of a surfactant. The invention also discloses a preparation method of the cable material. Ammonium octamolybdate is used as the smoke-suppressing agent, is relatively uniform in particle size and has relatively good compatibility. Magnesium hydroxide, aluminium hydroxide and red phosphorus are co-used as the flame retardant, thereby greatly increasing a flame-retardant effect of a system and reducing smoke production of the system.

The invention relates to the technical field of flame retardants, and specifically relates to modified expandable graphite, a flame retardant, a preparation method and application thereof in polyurethane foam, and the modified expandable graphite is characterized in that one or more layer of polymer surface modifying agents with special functional groups is /are adsorbed on the surface of expandable graphite, the preparation method of the modified expandable graphite comprises: carrying out surface modification on the expandable graphite by using an organic modifier containing hydroxyl and a polar six-membered ring structure, adding a dispersing agent, uniformly mixing, and crushing and sieving to obtain the modified graphite; after adding of the modified graphite into polyurethane composite polyether according to a certain ratio and uniform mixing, the modified graphite can be uniformly dispersed and suspended in the polyether; the flame retardancy of the obtained polyurethane thermalinsulation material is greatly improved, the other performances of the polyurethane rigid foam are not influenced, the flame retardancy is good, the flame retardant effect is durable, the oxygen index is greatly improved, and the heat release rate peak value is greatly reduced.

The invention relates to a low-smoke zero-halogen flame-retardant polyolefin oxygen barrier material with low heat release and high coking property, which comprises Levapren rubber and a ceramic master batch. The VA content of the Levapren rubber is greater than or equal to 50%, and at 100 DEG C, the mooney viscosity of the Levapren rubber is 20-30; based on the total weight of the ceramic masterbatch, the ceramic master batch comprises the following components in percentage by mass: 40-60% of ceramic powder, 40-60% of polyethylene resin, 0.1-0.3% of first antioxidant, 0.1-0.5% of polyethylene wax and 0.2-0.6% of silicone powder. The polyolefin oxygen barrier material disclosed in the invention has low heat release property, high coking property and excellent extrusion machinability.

Disclosed is a method to reduce flame spread within a room by attaching an interior finish compising at least 80 weight percent of a polymer composition to a ceiling, one or more walls, or combination thereof, wherein the interior finish partially or completely detaches from the wall or ceiling upon exposure to the heat of a flame. The polymer composition has certain properties of crystallization half-time, heat release capacity, and char generation and can comprise one or more polymers. The interior finish may detach or partially detach from the ceiling or wall as a result its thermal behavior when exposed to heat or as a result of softening or melting of fasteners. The spacing of the fasteners of the interior finish is dependent on the physical properties of the polymer.

The invention belongs to the technical field of macromolecular materials, and relates to a nitrogen-phosphorus-silicon modified graphene halogen-free flame retardant polymer composite material and a preparation method thereof, wherein the composite material is prepared from the following substances in parts by weight: 60-90 parts of a polymer, and 10-40 parts of a nitrogen-phosphorus-silicon modified graphene flame retardant. All the components are weighed according to the weight percentage and are mixed uniformly, and then the mixture is added into a twin-screw extruder, melted and mixed andthen subjected to injection molding into corresponding sample strips by an injection moulding machine, or the mixture is melted and blended by an internal mixer and is subjected to compression moulding forming by a mould with a certain size on a plate vulcanizing machine, or a method of solidifying moulding by a curing agent is adopted. The nitrogen-phosphorus-silicon modified graphene halogen-free flame retardant polymer composite material provided by the invention has the advantages of high charring property, and excellent flame retardancy and thermal stability, and can be applied to flame retardancy of materials such as electric cables, automobiles and packages.

The invention provides a polyimide foam composite material, and a preparation method and application thereof. The preparation method comprises the following steps: adding aromatic dianhydride into a tetrahydrofuran/methanol mixed solvent, carrying out heating to dissolve the aromatic dianhydride and carry out an esterification reaction, adding aromatic diamine and a foam stabilizer after the solution is transparent, and uniformly carrying out mixing to obtain a foam precursor solution; drying the foam precursor solution, then crushing the dried solid product to obtain polyester ammonium salt powder, and carrying out foaming and a preliminary imidization reaction to prepare partially imidized polyimide foam; and cutting the partially imidized polyimide foam, then carrying out thermal compounding on the cut product and a reinforcing material, and then carrying out a complete imidization reaction on the product obtained after the thermal compounding to obtain the polyimide foam compositematerial. The polyimide foam composite material provided by the invention has good flame retardancy, heat insulation performance, scratch resistance, and tear and tensile properties, and is low in smoke production amount during high-temperature baking and decomposition;

What is presented is a paper for mixing into the smokeable material of a smoking article, particularly into the tobacco rod of a cigarette, wherein the paper contains a share of fibers, which comprises pulp fibers and tobacco particles.

The invention discloses a high-performance intumescent sandwich-structure ultrathin fireproof anticorrosive composite coating for steel structures and a preparation method thereof. The composite coating is characterized in that organic silicon ceramic coatings are used as a bottom layer and a surface layer, intumescent fireproof coatings are used as middle layers, and the organic silicon ceramic coatings and the intumescent fireproof coatings are alternately arranged; the total number of the organic silicon ceramic coatings and the expansion fireproof coatings is at least three; and the multilayer structure is subjected to a polymer cross-linking reaction to form the composite coating with a sandwich structure. The composite coating provided by the invention has the advantages of ultra-thin and long fire-resistant effects, good hardness, wear resistance, weather resistance and decorativeness, relatively simple construction, and great application prospect and market potential.

The invention relates to a smoke-free moxibustion moxa stick with effects of activating blood circulation and promoting menstruation and a preparation method thereof. The smoke-free moxibustion moxa stick is prepared from the following raw materials in parts by weight: 1000 to 1100 parts of mugwort leaf, 40 to 60 parts of Chinese angelica, 30 to 50 parts of fructus evodiae and 1 to 10 parts of rhizoma chuanxiong. The smoke-free moxibustion moxa stick and the preparation method have the advantages that by adding the Chinese angelica, the fructus evodiae and the rhizoma chuanxiong, the amenorrhea and dysmenorrheal, deficiency-cold stomachache and rheumatic arthralgia can be effectively treated, and the moxibustion is convenient; the effects of activating blood circulation and promoting menstruation can be realized without using other medicines, and the pain of the patient caused by medicine taking is reduced; the convenience in use is realized, the cost is reduced, and the smoke-free moxibustion moxa stick is suitable for all ages of patients.

The invention relates to a composite halogen-free flame-retardant smoke suppression agent of a PVC wood-plastic composite material and a preparation method and application of the agent, which relate to the composite halogen-free flame-retardant smoke suppression agent and the preparation method and application of the agent, and aim at solving the problems that the PVC wood-plastic composite material is combustible, a great amount of smoke is produced when the composite material is combusted, the addition amount of the existing PVC wood-plastic composite material flame-retardant smoke suppression agent is large, the flame-retardant effect and the smoke suppression effect are poor, and the existing PVC wood-plastic composite material flame-retardant smoke suppression agent is harmful to the health of people. The composite halogen-free flame-retardant smoke suppression agent consists of ammonium polyphosphate, melamine, pentaerythritol and copper oxide. The preparation method comprises the following steps: I, preparing an expansion-type flame-retardant agent; II, preparing the composite halogen-free flame-retardant smoke suppression agent. The application method comprises the following steps: I, weighing raw materials; II, preparing high-temperature materials; III, preparing a premix; IV, extruding and forming. The flame-retardant smoke suppression agent solves the problems that the wood-plastic composite material is combustible, a great amount of smoke is produced when the composite material is combusted, the addition amount of the existing flame-retardant smoke suppression agent is large, the effect is poor, and the existing flame-retardant smoke suppression agent is harmful to the health of people. The composite halogen-free flame-retardant smoke suppression agent is used for resisting the combustion and suppressing the smoke of the PVC wood-plastic composite material.

The invention relates to fast-gelling plasticizer preparations comprising at least one aryl alkylsulfonate of the formula R¹—SO₂—O—R² and at least one diol dibenzoate of the general formula R³C(O)O—Y—O(O)CR⁴ and/or at least one dibenzyl dicarboxylate of the general formula R³CH₂O(O)C-Z-C(O)OCH₂R⁴, and also to its use as plasticizer in plastics, and to plastics which comprise these plasticizer preparations.

The invention discloses a flame-retardant type polyurethane rigid foam and a preparation method thereof, and relates to the technical field of processing of materials. The flame-retardant type polyurethane rigid foam and the preparation method have the advantages that the surface of basalt fiber is modified by phosphoric acid to obtain the phosphoric acid-modified basalt fiber, so that the surfaceactivity of the basalt fiber is improved; the phosphoric acid-modified basalt fiber is mixed with phosphotriester-(2-isopropyl chloride) to form a flame-retardant agent for preparing the flame-retardant type polyurethane rigid foam, so as to solve the problems of poor compatibility and low mechanical property due to direct compounding of the basalt fiber and the polyurethane rigid foam matrix, and reach the technical effects of accelerating the formation of a crosslinking network of a polyurethane foam system and improving the mechanical property of the flame-retardant type polyurethane rigidfoam; the phosphoric acid-modified basalt fiber and the phosphotriester-(2-isopropyl chloride) as the flame-retardant agent can be uniformly dispersed into the flame-retardant type polyurethane rigidfoam matrix, so as to reduce the heat release rate and smoke production amount of the polyurethane foam, and reach better flame-retardant and smoke-inhibiting properties of the polyurethane foam.