45results about How to "Improve flame retardant stability" patented technology

The invention discloses an expansion type flame-retardant polypropylene composite, which comprises the following components by weight percentages: 65-75% of polypropylene resin, 18-23% of halogen-free flame retardant, 3-5% of toughening agent, 3-5% of compatibilizing agent, 0.5-1% of nano-montmorillonite, 0.1-0.5% of lubricant and 0.2-0.5% of antioxidant. The expansion type flame-retardant polypropylene composite overcomes the disadvantage of current technology and provides the expansion type flame-retardant polypropylene composite with high toughness which is capable of reducing the content of the flame retardant and effectively preventing hydrolysis.

In the prepairng method, fine p-phthalic acid, glycol, catalyst and assistant are used to carry out esterification; fire retardant mixed liquid containing glycol exter radical propionate-phenyl phosphorus acid glycol exter, 2-propyloic phenyl phosphorous acid and glycol is added before polymerization and after exterification; and conventional polycondensation process is applied to obtain fire resistant polyester chip.

The invention relates to a flame-retarding and smoke-suppressing polyvinyl chloride membrane structure material.The material is prepared from, by mass, 80-120 parts of polyvinyl chloride paste resin, 50-85 parts of diisononyl phthalate, 5-50 parts of fire retardant, 0.5-30 parts of a cross-linking agent, 0.5-30 parts of ultraviolet light absorber, 5-50 parts of filler, 1-20 parts of heat stabilizer and 1-20 parts of a coupling agent, wherein the fire retardant is zinc stannate-molybdenum trioxide or zinc stannate-ammonium molybdate.According to the flame-retarding and smoke-suppressing polyvinyl chloride membrane structure material, an efficient flame-retarding and smoke-suppressing agent is added to polyvinyl chloride, so that flame retardation performance, heat resistance and smoke suppression performance of the material are improved.

The invention relates to a low-density halogen-free flame retardant monocomponent titanate catalyzed room-temperature vulcanized silicone rubber and preparation method thereof, the silicone rubber is prepared from the following components in parts by mass: 100 parts of modified alpha, omega-dihydroxy polydimethyl siloxane, 10-40 parts of modified alpha-hydroxy-omega-methyl polydimethyl siloxane, 10-20 parts of inorganic function filler, 3-10 parts of fumed silica, 0.5-2 parts of carbon black, 1-5 parts of vapor phase method titanium dioxide, 1-15 parts of a crosslinking agent, 1-10 parts of a titanate catalyst and 0-5 parts of a silane coupling agent. The processing property and storage property of the titanate catalyst system are improved, the silicone rubber with low viscosity can be prepared, the compatibility, color uniformity and storage stability and electrical property of the filler and the silicone rubber system are improved, the UL94-V0 level flame retardance is improved, the rubber cannot release any toxic gas in combustion; the prepared silicone rubber has lower density, wider viscosity adjustable range, and lower cost, the contact material cannot be corroded, and the demand on electronics industry is satisfied.

The invention belongs to the field of chemical industry and in particular relates to a flame retardant acrylate organic impregnant used for sealing and reinforcing and a preparation method of the flame retardant acrylate organic impregnant. The impregnant is prepared from monofunctional acrylate monomers, polyfunctional acrylate monomers, reactive flame retardants, a surfactant, an initiator, a polymerization inhibitor and a chelating agent. The impregnant has the advantages of excellent flame retardance, good flame retardance stability, no toxicity, good sealability and the like.

The invention provides a halogen-free flame-retardant PET (polyethylene terephthalate) material. The halogen-free flame-retardant PET material contains the following components in parts by weight: 40-60 parts of PET, 25-40 parts of halogen-free phosphorus-based copolyester flame retardant, 3-7 parts of auxiliary flame retardant, 5-20 parts of glass fiber, 1-3 parts of compatibilizer, 0.1-1 part ofcoupling agent and 0.5-2 parts of antioxidant II. A high-efficiency P-containing flame retardant is synthesized through polymerization reaction; and the presence of a P flame retardance element can improve the flame retardance of the polymer in a mode of changing the thermal degradation process of a polymer matrix and the like; the flame retardance stability of the polymer is further improved through the compounding of the P-containing flame retardant, and P and N flame retardance auxiliaries; and then the halogen-free flame-retardant PET material is prepared through the selection and dosagecontrol of reaction auxiliaries and the like. The halogen-free flame-retardant PET material prepared by the method has an excellent flame retardance effect, excellent mechanical property, high and lowtemperature resistance, chemical resistance and excellent resistance to gas, water, oil, peculiar smell and the like.

The invention discloses a thermo-oxidative aging-resistant low-precipitation MCA flame-retardant PA66 composite material and application of the thermo-oxidative aging-resistant low-precipitation MCA flame-retardant PA66 composite material. The composite material comprises the following components in parts by weight: 85-91 parts of PA66 resin, 8-12 parts of an MCA flame retardant, 0.6-1.0 part of hollow glass beads, 0.3-0.6 part of an antioxidant, 0.2-0.3 part of a flame retardant stabilizer and 0.3-0.6 part of zinc borate. According to the invention, PA66 is used as a resin matrix, a common MCA flame retardant in the market is adopted, and the hollow glass beads, anhydrous zinc borate and stearate are combined as flame retardant stabilizers, so that the composite material reaches the UL94V0 grade and is less separated out, and the printing effect of a final product is effectively improved; by adding an efficient compound antioxidant system, the performance retention rate of the material in a high-temperature environment is improved, and the material is widely applied to the fields of electronic appliances and connectors, especially the field of wiring terminals.

The invention relates to a charging distributor and a flame-retardant nylon manufacturing device and method, and belongs to the technical field of manufacturing of nylon composites. The charging distributor comprises a distributing body and a supporting mechanism arranged on the distributing body. The supporting mechanism comprises supporting legs used for supporting the distributing body on the corresponding inner walls of a charging container and enabling material channels to be formed between the distributing body and the inner walls of the charging container. Each supporting leg is provided with a pushing end matched with the corresponding inner wall of the charging container in a pushing-fit mode. The charging distributor is characterized in that the supporting mechanism further comprises a positioning structure used for being inserted into a discharge outlet of the charging container to prevent the axis of the distributing body from deviating from the vertical direction. The charging distributor can be placed in a charging bin and is convenient to overhaul and replace, and the positioning structure is adopted, so that the distributor is prevented from deviating under material impact.

The invention relates to a tear-resistant, peel-resistant and flame-retardant PVC membrane structural material preparation method and a product, wherein the preparation method includes the steps: mixing and stirring 100 parts of polyvinyl chloride resin, 55-65 parts of diisononyl ortho-phthalate, 5-25 parts of a modified flame-retardant smoke suppressant, 1-5 parts of isophorone diisocyanate, 1-5parts of a barium-zinc thermal stabilizer, 1-5 parts of fatty alcohol-polyoxyethylene ether, and 5-20 parts of a diluent, to obtain a PVC impregnating solution; immersing a polyester fabric in the PVCimpregnating solution, extruding by a rolling drum, drying, and cooling, to obtain a modified polyester fabric; preheating the modified polyester fabric under a condition of the temperature of 90-125DEG C; preheating a 0.1-0.5 mm thick PVC film under a condition of the temperature of 150-205 DEG C, then carrying out hot pressing with the modified polyester fabric, and cooling to obtain the tear-resistant, peel-resistant and flame-retardant PVC membrane structural material. The method modifies the PVC impregnating solution and the flame-retardant smoke suppressant in the PVC impregnating solution, so that the product has more superior tear resistance and peeling resistance, and further improves flame retardant stability, water scrubbing resistance and durability.

The invention belongs to the technical field of wire and cable materials, particularly relates to a high-temperature-resistant and high-pressure-resistant thin-wall insulated wire and cable for a railway passenger car, and solves the problems of heavy overall weight, large size, low tensile strength, poor electrical property, poor physical and mechanical properties, poor cable safety performance and the like of the wire and cable for the railway passenger car in the prior art. The high-temperature-resistant and high-pressure-resistant thin-wall insulated wire cable for the railway passenger car comprises a conductor, an insulating layer wrapped outside the conductor, a wrapping layer wrapped outside the insulating layer, a braid layer wrapped outside the wrapping layer and an outer sheath wrapped outside the braid layer, and the outer sheath comprises the following raw materials: polyvinyl chloride, polyester resin, sodium metaphosphate, phthalate, butylated hydroxytoluene and a flame retardant. The outer sheath material for the electric wire and cable of the railway passenger car has the advantages of simple and easily available raw materials, simple preparation, excellent high-temperature and high-pressure resistance, flame retardance, tensile strength and elongation at break.

The invention provides a macromolecular flame retardant, a preparation method and application thereof. The macromolecular flame retardant comprises a light stabilizer, an initiator, an active agent and a phosphorus-containing flame retardant with a structure shown in a formula I. According to the invention, in a preparation process of a macromolecular flame retardant, under the action of an initiator and an active agent, a phosphorus-containing flame retardant is used as a monomer structure unit for polymerization, so that the finally obtained macromolecular flame retardant has better flame retardance, micromolecule migration and precipitation cannot be generated, safety and environmental protection are truly realized, the obtained macromolecular flame retardant also has light stability byin combination with the light stabilizer, and the specific phosphorus-containing flame retardant and the light stabilizer are matched for use, so that the light stability of the flame retardant can be further improved; and the preparation method of the polymer flame retardant is simple, the raw materials are easy to obtain, the price is low, implementation is convenient, and wide industrial application prospects are achieved.

The invention discloses a preparation method for a melamine cyanurate nanosheet microsphere and an application thereof. The preparation method comprises the following steps: performing a mixing reaction on a cyanuric acid, melamine, water and a dispersant in a double-planetary-type mixing machine and preparing melamine cyanurate, adding the dispersant in a reaction process, reducing interface freeenergy, and reducing a hydrogen bond binding force between nanosheets, thereby controlling agglomeration between the nanosheets, and forming 4-6 um of nanosheet microspheres. A product prepared by the preparation method has the advantages of good powder flowability, easy dispersion and high inflaming retarding efficiency, and is easy to feed and process in a PA66 application process. The nanosheet has a very large specific surface area, so the flame retarding effect of the melamine cyanurate is promoted to be developed, and flame retarding efficiency is improved.

The invention discloses a halogen-free flame-retardant polycarbonate alloy resistant to cold and hot alternation and a preparation method thereof. The halogen-free flame-retardant polycarbonate alloyis prepared from 50 to 80 parts of polycarbonate, 10 to 40 parts of a polysiloxane-polycarbonate copolymer, 2 to 15 parts of a modified polyurethane, 0.1 to 3 parts of a flame retardant, 2 to 10 partsof a toughening agent, 0.5 to 1 part of an anti-dripping agent, 0.3 to 2 parts of an antioxidant, 0.2 to 0.5 part of a lubricating agent and 0.2 to 1 part of an ultraviolet absorbent. The halogen-free flame-retardant polycarbonate alloy has excellent flame retardant property, and the flame retardant level of a sample strip with the thickness of 1.6 mm reaches the UL94-V0 level. Meanwhile, the polysiloxane-polycarbonate copolymer and the modified polyurethane are added into conventional polycarbonate raw materials; while good processing fluidity is guaranteed, the internal stress of the material is reduced, the impact performance of the material under the cold and hot alternating condition is improved, and the material can be applied to occasions with high requirements on cold resistance,heat resistance and flame retardance in the construction industry, the industry, electronics, electrics and the like, and has wide market application prospects.

The invention provides a flame-retardant epoxy resin composition, a preparation method and application thereof. The flame-retardant epoxy resin composition is prepared from epoxy resin, a flame-retardant curing agent and a curing accelerator, wherein the flame-retardant curing agent has a structure shown in a formula I and contains phenolic hydroxyl and phosphorus-containing flame-retardant groups. According to the invention, phenolic hydroxyl in the flame-retardant curing agent and epoxy resin are subjected to a curing reaction, the curing efficiency is high, flame-retardant groups finally exist in the flame-retardant epoxy resin composition in the form of molecular fragments, the phenomenon that small molecules are separated out is avoided, the phenomenon that some additive flame retardants are easily dissolved in water to be separated out or hydrolyzed is also avoided, and high-efficiency environment-friendly flame retardance is truly realized; and the flame-retardant epoxy resin composition provided by the invention has excellent flame-retardant performance and mechanical performance, a copper-clad plate prepared from the flame-retardant epoxy resin composition has high flame-retardant performance and dielectric performance, the preparation process is simple, the raw materials are easy to obtain, and the flame-retardant epoxy resin composition has a wide industrial application prospect.

The invention provides a polyester resin composition, a preparation method and application thereof. The polyester resin composition is prepared from polyol, polybasic acid and/or anhydride, a reactivephosphorus-containing flame retardant, an esterification catalyst, a curing agent and a curing catalyst, wherein the reactive phosphorus-containing flame retardant has a structure shown in a formulaI or a formula II, and contains carboxyl or anhydride reaction groups. According to the invention, the reactive phosphorus-containing flame retardant is used as a reaction monomer to participate in esterification reaction of polyester resin synthesis, and finally exists in a polyester resin composition in the form of molecular chain segments, so that the phenomena of micromolecule precipitation, water dissolution or hydrolysis are avoided, and efficient and stable environment-friendly flame retardance is truly realized; and the polyester resin composition provided by the invention has excellent flame retardant property, mechanical property and chemical resistance, the preparation process is simple, the raw materials are easy to obtain, and the polyester resin composition has a wide industrial application prospect.

The invention relates to a high-stability halogen-free environmental-friendly fire retardant used for plastic, and a preparation method thereof. The high-stability halogen-free environmental-friendlyfire retardant used for plastic is prepared from, by weight, 45 to 80 parts of modified polyorganosiloxane, 20 to 32 parts of fumed silica, 8 to 15 parts of modified diatomite, 2 to 5 parts of a surface treatment agent, and 1 to 2 parts of polyethylene wax. Compared with the prior art, the high-stability halogen-free environmental-friendly fire retardant is excellent in flame resistance, smoking inhibition effect, and plastifying effect, is safe and reliable, is low in cost, contains no toxic additive, is capable of improving mechanical process performance, flame resistance, and heat resistance of base materials, reducing smoke formation amount effectively, inhibiting generation of carbon dioxide, and satisfying novel type fire retardant halogen-free phosphorus-free environmental-protection requirements; the raw materials are widely available.

The invention provides an acrylate copolymer, a preparation method and application thereof. The acrylate copolymer comprises acrylate, methacrylic acid, an initiator and a phosphorus-containing flameretardant with a structure as shown in a formula I, and has relatively good flame retardant property and flame retardant stability on the premise of having proper bonding strength and flexibility. According to the invention, a phosphorus-containing flame retardant is creatively used as a polymer monomer, and a flame retardant group is grafted into an acrylate copolymer in the form of a stable chemical bond, so that the acrylate copolymer has better flame retardancy, the flame retardant is prevented from being separated out in the form of small molecules in the reuse process, the phenomena thatthe flame retardant is dissolved in water to be separated out or hydrolyzed and the like are avoided, and efficient environment-friendly flame retardance is truly achieved; and the acrylate copolymerhas the advantages of simple preparation method, accessible raw materials, low price and wide industrial application prospects, and is convenient to implement.

The invention discloses an alkyd resin composition, a preparation method and application thereof. The alkyd resin composition comprises anhydride, tricyclic diterpene resin acid, epoxy resin, an initiator, a catalyst and a phosphorus-containing flame retardant with a structure shown in a formula I. According to the invention, the phosphorus-containing flame retardant is connected with acid anhydride through tricyclic diterpene resin acid by chemical bonds, and epoxy resin is added, so that the obtained alkyd resin composition has higher hardness and better flame retardance, cannot be separatedout due to migration of small molecules, cannot be separated out due to high solubility in water, and is environment-friendly, safe and harmless; and the alkyd resin composition has the advantages ofsimple preparation method, low price and accessible raw materials, and is suitable for industrial large-scale production and application.