20results about How to "Reduce heat release" patented technology

The invention relates to the technical field of wire and cable manufacturing, in particular to a high-flexibility low-smoke fire-fighting power cable and a preparation method thereof. The cable sequentially comprises a cable core, a shielding layer and an outer sheath layer from inside to outside, the outer sheath layer is prepared from the following preparation raw materials: 60 to 65 parts of methyl vinyl silicone rubber, 12 to 15 parts of ethylene propylene diene monomer, 8 to 10 parts of linear low-density polyethylene, 5 to 6 parts of cross-linking agent, 20 to 22 parts of flame retardant, 6 to 8 parts of reinforced flame-retardant filler, 20 to 25 parts of modified heat-conducting filler, 1.2 to 1.5 parts of coupling agent, 1.3 to 1.5 parts of antioxidant, 3 to 3.5 parts of lubricant, 2 to 2.5 parts of vulcanizing agent and 0.6 to 0.8 part of accelerant. The outer sheath layer of the high-flexibility low-smoke fire-fighting power cable prepared by the invention has excellent mechanical strength, toughness, heat-conducting property, high temperature resistance and flame retardant property, so that the high-flexibility low-smoke fire-fighting power cable has higher reliability and safety in fire-fighting power supply occasions.

The invention discloses a B2-grade flame-retardant PVC (polyvinyl chloride) cable material and a preparation method thereof, and a high-wear-resistance and high-flame-retardant PVC material and a preparation method thereof. The PVC cable material is prepared from the following raw materials in parts by weight: 20-40 parts of polyvinyl chloride resin A, 40-60 parts of polyvinyl chloride resin B, 20-50 parts of a plasticizer A, 15-35 parts of a plasticizer B, 10-25 parts of calcium carbonate, 30-60 parts of a flame retardant A, 15-25 parts of a flame retardant B, 7-10 parts of a stabilizer, 5-10 parts of a carbon forming modifier A, 3-6 parts of a carbon forming modifier B, 2-8 parts of a flexibilizer and 0.5-1 part of a lubricant. According to the B2-grade flame-retardant PVC cable material, on the basis of meeting all requirements of ST2 sheath materials in GB / T12706-2008, a ZB2-YJV223 * 1208.7 / 15kV cable made of the B2-grade flame-retardant PVC cable material can meet the B2-grade combustion requirement in GB31247-2014, and the B2-grade flame-retardant PVC cable material is suitable for cables with the B2-grade flame-retardant requirement and has the advantages of being low in cost, high in cost performance, convenient to produce and extrude, high in production efficiency and the like.

The invention relates to a micromolecular cyclophosphazene intumescent flame retardant with ultraviolet shielding performance and a preparation method thereof, and belongs to the technical field of flame retardant materials. The molecular formula of the flame retardant is C < 24 > H < 24 > N < 2 > < 1P3 >; the flame retardant is a micromolecular cyclophosphazene intumescent flame retardant integrating an intumescent system, the flame retardant contains higher nitrogen and phosphorus contents and has higher flame retardant efficiency, and the decomposition temperature of the flame retardant is close to that of a high polymer material, so that a synergistic effect can be better exerted, and the flame retardant effect is improved; meanwhile, a polycyclic structure is adopted for synthesis, so that the content of large pi bonds in a system is increased, the flame retardant is endowed with more excellent ultraviolet absorption capacity, the compatibility of the flame retardant and a polymer system can be promoted while the aging process of a polymer material is effectively delayed, and the mechanical property of a matrix is further improved.

The present application relates to the technical field of high polymer material flame-retardant modification, and particularly relates to a COF hierarchical modification APP-based core-shell flame-retardant smoke suppressant, a preparation method and application thereof. The flame-retardant smoke suppressant takes APP as a flame-retardant core layer; takes PVP as a soft template agent, and assists in situ growth of melamine-p-phenylenedimethylene formaldehyde (COF) on the surface of APP to adsorb combustible volatile components in the initial pyrolysis stage, provide a gas source, and act as a Fe 3+ coordination skeleton; takes tannic acid as a coordination agent and a carbon source, and constructs a multi-level core-shell structure with Fe 3+ coordination. The present application realizes integration of flame-retardant and smoke suppression functions through hierarchical modification. When the flame-retardant agent is applied to polyurethane, it can significantly reduce the heat release rate, smoke release rate and toxic gas generation amount, and simultaneously improve the compatibility with the matrix, effectively overcoming the defects of poor compatibility and insufficient flame-retardant and smoke suppression performance of traditional APP flame-retardant agents. The present application has simple preparation process and controllable conditions, and is suitable for industrial production.

The invention relates to the technical field of polymethyl methacrylate, and discloses a flame-retardant polymethyl methacrylate material and a preparation method thereof.The flame-retardant polymethyl methacrylate material is obtained by reacting polymethyl methacrylate, a hydroxyl-terminated flame retardant and p-toluenesulfonic acid. The linear polymethyl methacrylate is crosslinked into a three-dimensional network structure, so that the crosslinking degree between molecular chains is enhanced, the molecular chains are not easy to slip under stress, good structural stability is maintained, and the polymethyl methacrylate has high tensile strength and bending strength. The flame retardant contains piperazine rings and phosphate structures, forms an intumescent flame-retardant system, generates phosphoric acid substances, nitrogen and other gases during combustion, promotes dehydration of a matrix to form an intumescent carbon layer, isolates oxygen, prevents heat conduction, inhibits the combustion process, remarkably reduces the peak value of the heat release rate and the total heat release amount, and has excellent flame-retardant performance.

The invention relates to a low-smoke halogen-free material for a B2ca high-flame-retardant high-flexibility cable and a preparation method of the low-smoke halogen-free material. The raw materials comprise 30-50 parts of POE resin; 10 to 20 parts of metallocene polyethylene; 10 parts of a flame-retardant plasticizer; 10 to 20 parts of a flame retardant PPO; 50 to 100 parts of flame retardant phosphorus nitrogen; 50-100 parts of a flame retardant magnesium hydroxide; 0.3 to 0.5 part of an antioxidant; 15-20 parts of a shell forming agent; and 1 part of an auxiliary agent. The preparation method comprises the steps that all the raw material components are put into an internal mixer according to the proportion to be heated and pre-stirred, the temperature of the internal mixer is controlled to range from 170 DEG C to 180 DEG C, and the internal mixing time ranges from 15 min to 20 min; feeding the internally mixed and clustered micellar cones into a double-screw granulator for extruding and granulating, wherein the heating temperature of each section of the double-screw granulator is equally divided from 150 to 120 DEG C according to the number of heating sections; and extruding and granulating to obtain the material. The cable has the advantages of being flexible, easy to bend, good in insulativity, low in heat release amount and the like.

The invention relates to the technical field of fibers, and discloses a preparation method of flame-retardant fibers for fabrics, which comprises the following steps: adding polyurethane resin and a hydroxyl polyamide flame retardant into N, N-dimethylformamide, stirring to prepare a spinning solution, and spinning through an electrostatic spinning machine to obtain the flame-retardant fibers for fabrics. The hydroxyl polyamide flame retardant contains a large number of hydrophilic hydroxyl groups, the moisture regain and the moisture absorption performance of the fiber are improved, the flame retardant and polyurethane resin have similar compatibility, meanwhile, the hydroxyl groups contained in the flame retardant and the polyurethane resin can generate hydrogen-bond interaction, the interfacial interaction force between the hydroxyl groups and the polyurethane resin is improved, and the flame-retardant performance of the fiber is improved. The flame retardant can be uniformly dispersed in a spandex fiber matrix, and the fiber still keeps good mechanical properties. The spandex fiber disclosed by the invention can be blended with cotton fiber, wool and the like to prepare a fabric and a textile which are high in flame retardance, good in mechanical property, hydrophilic and moisture-absorbing.

The application discloses a kind of MOF / COF synergic modification cellulose biomass composite flame retardant and its preparation method and application, it is related to biomass-based flame retardant technical field.A kind of MOF / COF synergic modification cellulose biomass composite flame retardant preparation method, including the following steps: after pretreatment, cellulose biomass is modified with functional group, and functional group cellulose biomass carrier is obtained;With the functional group cellulose biomass carrier as substrate, by sequential growth method or one-pot method, MOF and COF are simultaneously loaded on it, and the MOF / COF synergic modification cellulose biomass composite flame retardant is obtained.The flame retardant proposed in the application gives full play to the efficient catalytic charring capacity of MOF, the excellent adsorption and stability characteristics of COF and the carbon source and carrier effect of cellulose biomass, and realizes the multiple flame retardant mechanism synergy of "physical barrier-catalytic charring-adsorption smoke suppression".

The present invention provides a high-nickel cobalt-free positive electrode material and a preparation method and application thereof, which relates to the technical field of lithium-ion batteries. Specifically, it comprises lithium nickel manganese oxide and a coating layer uniformly coated on the lithium nickel manganese oxide; the general formula of lithium nickel manganese oxide is Li a Ni b Mn c Zr d O2, 0.9≤a≤1.3, 0.5≤b<1, 0.001≤d≤0.01, b+c+d=1; the general formula of the coating layer is XCuZrY3, X includes at least one of Rb or Cs, and Y includes at least one of S, Se or Te. Aiming at the potential safety hazards caused by heat release of high-nickel positive electrode materials, the present invention coats and modifies the positive electrode materials, coats a class of nanomaterials with ultra-low thermal conductivity on the surface of the lithium nickel manganese oxide material, reduces the heat transfer on the surface of the material, significantly improves the DSC temperature of the pole piece made of the positive electrode material, reduces the maximum heat release value and the total heat release, thereby improving the safety performance of the high-nickel cobalt-free positive electrode material.

The invention discloses a halogen-free flame-retardant polypropylene composite material with high boiling resistance and low smoke generation and a preparation method of the halogen-free flame-retardant polypropylene composite material. The flame-retardant polypropylene composite material comprises polypropylene, and a hydrophobic phosphorus-nitrogen intumescent flame retardant is dispersed in the polypropylene; the hydrophobic phosphorus-nitrogen intumescent flame retardant is a phosphorus-nitrogen intumescent flame retardant of which the surface is coated with a vesicle structure, and the vesicle structure is a self-assembly structure obtained after an alcoholysis reaction of a sulfur-containing silane compound and the phosphorus-nitrogen intumescent flame retardant. The flame retardant with the vesicle structure can keep good water resistance and compatibility with a polypropylene matrix in a high-humidity-heat environment, the precipitation amount of the flame retardant after high-temperature water boiling can be reduced, and the migration and precipitation problems of the flame retardant in the polypropylene matrix are effectively solved. Meanwhile, the vesicle structure can also improve the thermal stability and char forming performance of the flame-retardant polypropylene and improve the barrier effect on heat and combustible gas in the combustion process, and compared with common flame-retardant polypropylene, the total released heat is reduced by 24.0%, and the carbon residue mass is increased by 51.7%.

The present invention provides a flame retardant vinyl ester resin monomer, an intrinsic flame retardant vinyl ester resin cured product and a glass fiber reinforced flame retardant vinyl ester resin composite, and relates to the technical field of flame retardant materials. The structure of the flame retardant vinyl ester resin monomer provided by the present invention contains a -C=N- bond and an aromatic structure, and has good charring performance and high rigidity; and the monomer contains a -CH2-CH-CH2- structure, which helps to improve the bending strength of the resin; at the same time, the monomer contains a hydroxyl group, so that the resin has a good impregnation effect on the glass fiber. The intrinsic flame retardant vinyl ester resin cured product obtained by using the flame retardant vinyl ester resin monomer provided by the present invention has both low heat release and smoke release, and excellent mechanical properties; the glass fiber reinforced vinyl ester resin composite prepared by using the flame retardant vinyl ester resin monomer has a higher limiting oxygen index, lower heat release and smoke release, and better mechanical properties.

The application discloses a low-heat-release, low-smoke-density flame-retardant polyamide material and a preparation method and application thereof, and belongs to the technical field of high polymer materials. The material comprises nylon resin 52-61%, a flame retardant 18-26%, a flame-retardant synergist 6-10%, a plasticizer 8-15%, a coupling agent 0.5-1.0%, an antioxidant 0.3-1.0% and a lubricant 0.3-1.0%, and is prepared through mixing, melt mixing, extrusion and granulation. The application effectively reduces the heat release and the smoke density of the polyamide material during combustion through the synergistic effect of the components such as the flame retardant, and meanwhile, good mechanical properties and processing stability are maintained, thereby meeting the demand of high-safety-grade application scenarios.

The application discloses a kind of high-strength waterproof board and preparation method thereof, it is related to plate technical field.The preparation method of the application includes the following steps: sequentially stack 1 steel plate, 2 base plates, 1 fingerprint-resistant polymer film on 1 fingerprint-resistant polymer film, then heat pressing solidification, after cooling, plate is taken out, and high-strength waterproof board is obtained;Wherein, base plate is prepared from modified kraft paper and modified color paper.The water resistance, fire resistance and bonding strength of the plate are effectively improved by modifying kraft paper with modified phenolic resin, hydrophilic silicon dioxide and other components;The bonding strength, water resistance and fire resistance of the plate are further improved by modifying color paper with melamine, vanillin, flame retardant DOPO, 3,4-dihydroxybenzaldehyde and other components.Therefore, the application has a more extensive application prospect.

The invention discloses a flame retardant material as well as a preparation method and application thereof, the preparation method of the flame retardant material comprises the following steps: S1, carrying out Michael addition reaction on a compound A containing vinyl and ester groups and a compound B containing at least three amino groups to obtain an intermediate; s2, carrying out amine ester exchange reaction on the intermediate to obtain hyperbranched polyamide; and S3, mixing the hyperbranched polyamide, phytic acid and an amino-containing silane coupling agent for reaction, and then reacting with water to obtain the flame retardant material. The flame retardant material prepared by the preparation method disclosed by the invention is halogen-free and environment-friendly, has excellent thermal stability and expansion performance, is small in addition amount in TPU (Thermoplastic Polyurethane) and good in flame-retardant effect, has relatively good dispersity and compatibility in a TPU material, improves the melt index and the flame-retardant effect of the TPU material on the premise of not damaging the mechanical property of the TPU material when being added into the TPU material, and has good application prospects. And the processability is improved.

The invention provides a flame-retardant polylactic acid composite material based on Schiff base, cyclodextrin and Co-MOF (cobalt-metal organic framework). An imidazole compound and cobalt salt are utilized to form Co-MOF outside cyclodextrin, the cyclodextrin is subjected to surface modification, siloxane phenyl Schiff base is added into the cyclodextrin, and the modified cyclodextrin inclusion compound flame retardant with a multi-component integrated multilevel structure is obtained. The flame retardant is compounded with polylactic acid, so that the flame retardant property of polylactic acid can be greatly improved, the char yield after combustion is high, the heat release amount and the release rate are both reduced, the yield of combustible gas is effectively reduced, and the effects of retarding flame, reducing heat, inhibiting smoke and inhibiting generation of toxic carbon monoxide are achieved.

The present invention relates to the field of cables, and in particular to a self-protecting, impact-resistant, low-heat-release control cable, comprising a conductor, an insulating layer, a filling layer, a heat-insulating layer, a shielding and fire-proofing layer, and an outer sheath arranged in sequence from the inside to the outside of the cable; the conductor is used to transmit electrical energy, the insulating layer is used to prevent the cable from directly contacting the external environment, the filling layer is used to fill the gap between the cable conductors, the heat-insulating layer is used to prevent the cable from overheating when working in a high-temperature environment, the shielding and fire-proofing layer is used to shield electromagnetic interference and protect the internal structure of the cable in the event of a fire, and the outer sheath is used to separate the internal structure of the cable from the external environment. The cable structure of the present invention is reasonable and simple, the cable materials are all low-calorific value materials, the heat release of the cable when burning is low, and the corrugated structure gives the cable itself better toughness and impact resistance, thereby enhancing the safety of the cable when in use.

This invention relates to the field of fire-resistant aluminum composite panel technology and discloses a method for producing and processing fire-resistant aluminum composite panels, including the following steps: Step S1: Raw materials are fed into the hopper of a twin-screw extruder via a screw feeder and then into the twin-screw extruder. The twin-screw extruder melts and plasticizes the raw materials and extrudes them through a T-die. Step S2: The T-die sends the molten raw materials to a three-roll calender. The three-roll calender cools the molten raw materials and rolls and shapes them into a flame-retardant core board. Step S3: The two sides of the flame-retardant core board are bonded to the aluminum plate with a polymer adhesive film. After cooling and shaping, it becomes a fire-resistant aluminum composite panel blank and is placed in the cutting area for later use. Step S4: The fire-resistant aluminum composite panel blank is cut into the required dimensions according to production requirements. The aluminum plate scraps generated during cutting are separated from the flame-retardant core board. The aluminum plate is sold, and the flame-retardant core board is returned to the screw feeder for recycling. The production process is more environmentally friendly.

The present application relates to cable material modification technical field, specifically to a kind of low heat release flame-retardant polyolefin cable material and its double-screw modification method;Including polyolefin matrix resin 100 parts, phosphorus-containing triphenylene structure intumescent flame retardant 18 to 28 parts, transition metal chelate char-forming catalyst 0.5 to 3 parts, nano synergistic flame retardant 3 to 8 parts, compatibilizer 5 to 10 parts, antioxidant 0.3 to 1 part, lubricant 0.5 to 2 parts;By introducing transition metal chelate char-forming catalyst, catalyze polyolefin to form carbon quickly when burning, inhibit the peak value of heat release rate in the initial stage of fire, solve the problem of traditional system carbonation lag.

The utility model belongs to the field of rail transit medium-voltage cables, and provides a rail transit medium-voltage 35kV high-flame-retardant B1-level cable, which comprises an electric unit and an insulating unit, and the insulating unit wraps the electric unit in the center of a cable core; a semi-conductive water-blocking tape wrapping layer is wrapped outside the insulation unit, and the semi-conductive water-blocking tape wrapping layer is arranged between the insulation unit and the copper wire sparse winding shielding layer; the copper wire sparsely-wound shielding layer adopts a copper wire shielding and outer copper strip sparsely-wound structure; the copper wire sparse winding shielding layer is located between the semi-conductive water-blocking tape wrapping layer and the heat insulation layer; the heat insulation layer is formed by overlapping and wrapping ceramic silicone rubber composite tapes, and when the cable is burnt, a ceramic hard shell structure is formed. The cable provided by the utility model has the advantages of strong overload capacity, radial water resistance, rat resistance, ultraviolet light resistance, B1-class flame retardance and the like, and can fully meet the harsh use working conditions of indoor and outdoor scenes of rail transit.

The invention relates to the technical field of adhesives, and discloses a preparation process of a flame-retardant adhesive for a copper-clad plate, and the flame-retardant adhesive for the copper-clad plate is obtained by mixing a solvent, epoxy resin, phosphorus-containing polyarylether, a defoaming agent, a curing agent and the like. A molecular main chain of the phosphorus-containing polyarylether contains a DOPO group and a phenyl imide ring structure, a nitrogen-phosphorus flame-retardant system is formed, a very good condensed phase flame-retardant effect is achieved, an expanded carbon layer is formed in an adhesive matrix during combustion, the phosphorus-containing polyarylether has an excellent flame-retardant effect, and the heat release rate peak value and the total heat release amount are remarkably reduced. The phosphorus-containing polyarylether contains a phenyl imide ring with large rigidity and high structural stability, and a side chain contains a flexible long-chain alkyl group, so that the phosphorus-containing polyarylether has a very good toughening effect, so that the epoxy resin adhesive has very good toughness and higher impact strength and bending strength while maintaining good mechanical strength.