38results about How to "Excellent halogen-free flame retardant performance" patented technology

The invention discloses a styrene series non-halogen flame retardant injection-grade wood plastic composite and a preparation method thereof. The styrene series non-halogen flame retardant injection-grade wood plastic composite is prepared from the following components in percentage by mass: 25-60 percent of styrene series resin, 5-60 percent of plant fiber, 0.5-20 percent of compatilizer, 0-30 percent of flexibilizer, 0.5-8 percent of dispersing agent, 5-40 percent of fire retardant and synergetic fire retardant and 0-1 percent of antioxidant. Compared with the traditional wood plastic composite, the styrene series non-halogen flame retardant injection-grade wood plastic composite prepared by the invention has the characteristics of simple production flow, less consumption amount of fireretardant, good non-halogen flame retardant effect, wide range of moulding ways, and the like, and is suitable for various injection moulded parts such as shells of electric appliances, parts for vehicles, and parts for furniture and buildings, and the like.

The invention discloses carboxyl-terminated phosphorus-containing copolyester which is formed by randomly connecting and combining structural units shown as I, II and III according to carboxyl and hydroxyl functional groups, and the Mw of the carboxyl-terminated phosphorus-containing copolyester is 1.1*10<3>-1.3*10<4> g.mol<-1>. The invention further discloses a preparation method of the carboxyl-terminated phosphorus-containing copolyester, a halogen-free flame retardant biology-based pressure sensitive adhesive composed of the carboxyl-terminated phosphorus-containing copolyester and application. The copolyester is biology-based phosphorus-containing copolyester, the halogen-free flame retardant pressure sensitive adhesive formed by the copolyester and renewable resource epoxidized plant oil not only maintains the basic characteristics and good adhesive strength of a biology base, but also achieves the excellent halogen-free flame retardant properties, and the blank of biology-based halogen-free flame retardant pressure sensitive adhesive products is filled up; in addition, preparation is easy and mature, solvent is not used, the cost is low, pollution to the environment is little, and application and popularization are convenient.

The invention discloses a UV-curing halogen-free flame-retardant low-shrinkage epoxy resin composition and a preparation method thereof. The composition is prepared from, by mass, 50%-70% of phosphorus-containing flame-retardant epoxy resin prepolymer, 11% -30% of active diluents, 5%-20% of spirocyclic monomers and 2%-4% of positive ion photoinitiator. The preparation method of the phosphorus-containing flame-retardant epoxy resin prepolymer includes the steps of mixing epoxy resin E-51 with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxider, and raising the temperature to enable the mixture to be reacted to prepare the prepolymer. According to the composition and the preparation method thereof, the product is not only high in flame-retardant efficiency, but also small in effect on mechanical performance of epoxy resin; when the content of phosphorus is 1.3%, the cured product LOI reaches 34%, vertical combustion passes through UL 94V-0 level, curing can be performed rapidly under irradiation of UV, the volume shrinkage rate is quite low in the curing forming process, and even zero shrinkage can be reached.

The invention relates to fire retardants, and in particular relates to a halogen-free active fire retardant and a preparation method thereof. The method comprises the following steps: under the protection of nitrogen, sequentially adding reactants, namely N-hydroxyethylaniline, 4-hydroxybenzaldehyde and a solvent, into a container equipped with a condensate return pipe and a magnetic stirrer; after a heating reaction, adding DOPO to continue the reaction to obtain a light blue solid deposit; and cooling the deposit, keeping the deposit standing, pouring out the upper-layer solvent, washing the deposit with a solvent, and drying the deposit to obtain the halogen-free active fire retardant. Or the method comprises the following steps: under the protection of nitrogen, sequentially adding the reactants, namely N-hydroxyethylaniline, 4-hydroxybenzaldehyde and a solvent, into a container equipped with a condensate return pipe and a magnetic stirrer; after a heating reaction, adding DOPO to continue the reaction to obtain a light blue solution; and concentrating the solution, and precipitating the solution with a precipitator to obtain the halogen-free active fire retardant. The preparation method is simple, and the halogen-free active fire retardant contains a plurality of kinds of active groups, is well compatible with a matrix and has a good halogen-free flame-retardant property.

The invention discloses a transparent halogen-free flame-retardant polycarbonate composite material and a preparation method thereof. The composite material is prepared from the following raw materials by weight: 50-80 parts of polycarbonate, 30-40 parts of a polycarbonate-polysiloxane copolymer, 0.04-0.13 part of a sulfonate flame retardant, 0.1-0.5 part of an antioxidant, 0.15-1.1 parts of a UVstabilizer and 0.2 to 1 part of a lubricant. The transparent halogen-free flame-retardant polycarbonate composite material of the invention is obtained by thoroughly mixing the above components in proportion, then performing extrusion via a twin-screw extruder, and performing granulation and preparation of a standard spline. The transparent halogen-free flame-retardant polycarbonate composite material has the characteristcis of high flame retardancy, high transparency, low temperature impact resistance, environment friendliness, etc., and is very applicable to manufacturing of solar devices, electrical junction boxes, electrical connectors, electric vehicle charger shells, outdoor electrical shells, smart meter shells, smart power grid nodes, photovoltaic frames, miniature circuit breakershells, etc.

The invention discloses a rat-proof and ant-proof low-smoke halogen-free flame-retardant control cable for warships, which comprises insulating wire cores, a halogen-free flame-retardant belt and a sheath layer. Each insulating wire core comprises a conductor and an insulating layer arranged outside the conductor by extrusion. The cable core is wrapped with the halogen-free flame-retardant belt. The sheath layer is arranged by extrusion outside the halogen-free flame-retardant belt. The sheath layer comprises the following raw materials by weight: 80-100 parts of ethylene propylene diene monomer, 30-40 parts of filler, 2-6 parts of plasticizer, 1-2 parts of cross-linker, 0.5-0.6 parts of cross-linking auxiliary, 25-35 parts of flame retardant, 2-4 parts of flame retarding auxiliary, 1-3 parts of antioxidant, 2-3 parts of rat and ant repellent, 2-4 parts of compatilizer and 2-4 parts of lubricant. Through the coordination of the substances, the cable of the invention has good halogen-free flame retardancy, rat and ant resistance and mechanical performance.

The invention discloses a glass fiber reinforced polyethylene powder, which comprises the following components by mass: 50%-70% of polyethylene, 5%-15% of glass fiber, 10%-15% of a compound halogen-free flame retardant, 5%-15% of nano-calcium carbonate, 0.1%-0.5% of calcium stearate, 0.1%-1% of an antioxidant, and 0.5%-1% of pentaerythritol stearate. The glass fiber is alkali-free chopped glass fiber that has a diameter of 8-15micrometers and a surface treated by a silane coupling agent. The powder provided by the invention utilizes the blending synergistic effect of glass fiber and nano-carbon fiber, significantly improves the impact toughness, rigidity and heat resistance of the material, and has good halogen-free flame retardant effect, can achieve the UL94V-0 flame retardant grade, and has good use effect and social and economic benefits when applied to construction, transportation, electric wires and cables, chemical machinery and other fields.

The invention discloses a halogen-free environment-friendly flame-retardant modified thermoplastic polyester resin. The thermoplastic polyester resin comprises the following components in parts by weight: 5-95% of polyester resin, 0.1-30% of calcium hypophosphite, 0-10% of halogen-free flame-retardant additive, 0.5-10% of one or more of processing aid, thermal and process stabilizing agent, ultraviolet stabilizer, antidripping agent, pigment, releasing agent, rubber elastomeric polymer and nucleating agent and 0-50% of inorganic filler. The product provided by the invention has favorable halogen-free flame-retardant performance, particularly favorable thermal resistance at 775 DEG C under the length of 1.6mm and the thickness of 0.8mm according to the UL94 standard, excellent mechanical property, particularly good impact strength and elasticity modulus and favorable stretchability and electrical property and can pass a CTI (Computer Telephony Integration) value under the condition of 600V.

The invention belongs to the technical field of plastic modification and processing and in particular relates to a high-efficiency enhanced halogen-free flame-retardant functional master batch capableof being directly applied to injection molding of polypropylene products and a preparation method of the functional master batch. The functional master batch is prepared by combining a master batch Aand a master batch B, wherein the master batch A comprises the following components in percentage by mass: 50.0-70.0% of glass fibers, 15.0-35.0% of high-fluidity polypropylene, 5.0-10.0% of an elastic ionomer, 3.0-6.0% of atactic polypropylene, 1.0-3.0% of maleic anhydride grafted polypropylene, 1.0-3.0% of polytetrafluoroethylene powder and 0.1-0.3% of an antioxidant. Compared with the traditional plastic functional master batch, the functional master batch prepared by the invention has the advantages that the condition that the modification effectiveness is low because the glass fibers andthe flame retardant perform mutual shearing friction to produce heat in the processing procedures of an enhanced halogen-free flame-retardant polypropylene modified system is avoided, the problem that mutual modification effectiveness damage is caused by mismatching of processing temperatures of the two modified systems is solved, and the modification effectiveness of the two is obviously enhanced.

The invention discloses a flame-retardant antistatic bifunctional modified polyethylene composite material and its preparation method. The flame-retardant antistatic bifunctional modified polyethylene composite material comprises, by mass, 50-80% of polyethylene, 12-25% of a compounded flame retardant, 2-5% of an antistatic master batch, 0.1-2% of a lubricant, 0.1-0.6% of a primary antioxidant and 0.1-0.5% of an auxiliary antioxidant. Compared with polyethylene composite materials in the prior art, the flame-retardant antistatic bifunctional modified polyethylene composite material has the advantages of very good halogen-free flame retardation property (oxygen index reaching above 28), UL94-0 flame retardation grade standard reaching, small smoke quantity, non-toxicity, no fused drop phenomenon, good dispersibility, good molding processability, high antistatic property, good durability, and surface resistance reaching 10<7>-10<9>omega.m.

The present invention discloses halogen-free and flame-retardant polyethylene powder and a preparation method thereof, wherein the halogen-free and flame retardant polyethylene powder comprises, by mass, 60-85% of polyethylene, 10-15% of a halogen-free flame-retardant agent, 3-8% of a reinforcing agent, 0.1-1% of a slipping agent, 0.1-1% of an anti-aging agent, 0.1-1% of polyethylene wax, and 0.1-0.5% of an antioxidant, wherein the halogen-free flame-retardant agent is a mixture comprising 50 wt% of poly ammonium phosphate, 30 wt% of a melamine polyphosphate, and 20 wt% of nanometer montmorillonite. The halogen-free and flame-retardant polyethylene powder of the present invention has beneficial effects of good halogen-free flame-retardant property low smoke, no toxicity, environmental protection, excellent mechanical property, good dispersion, low cost, and good appearance good, achieves the UL94-0 flame retardant grade, and can be widely used in the fields of pipes, chemical industry, machinery, packaging, electrical apparatuses, and the like.

The present invention discloses a halogen-free, fire retardation, strengthening and anti-aging PBT composite material, which comprises, by mass, 60-85% of PBT, 8-15% of a halogen-free fire retardation agent, 5-15% of a strengthening agent, 2-5%of SMA, 0.5-2% of an anti-aging agent, 0.5-1.5% of carbodiimide, 0.1-0.5% of pyromellitic dianhydride, 0.1-0.5% of an antioxidant, and 0.1-1% of pentaerythrityl tetrastearate, wherein the halogen-free fire retardation agent is the complex comprising a bisphenol A-bis(diphenyl phosphate) fire retardation agent and a polydimethylsiloxane fire retardation agent according to a mass ratio of 2:1. The halogen-free, fire retardation, strengthening and anti-aging PBT composite material of the present invention has beneficial effects of excellent halogen-free fire retardation, excellent mechanical property, good processability, stable performance, strong hydrolysis resistance, excellent electrical performance, and low cost, can be used in the fields of electronic appliances, household appliances, machinery parts and the like, and has good practical values and prospects.

The invention discloses a resin compound which comprises the following components in parts by solid weight: 100 parts of modified bismaleimide prepolymer, 5-30 parts of epoxy resin, 0-20 parts of curing agent, 0-150 parts of filler and 0.001-5 parts of curing accelerator, wherein the modified bismaleimide prepolymer is prepared by pre-polymerizing at least bismaleimide resin with allyl compounds.Compared with the prior art, the resin compound disclosed by the invention has the advantages of high peel strength, halogen-free fire resistance, high heat resistance, high temperature modulus retention rate, excellent toughness, coefficient of thermal expansion and high modulus retention rate. Especially, the resin compound can meet the requirement for halogen-free fire resistance UL94V-0 whilehas excellent high temperature modulus retention rate and low coefficient of thermal expansion, so that the resin compound can be applied to high-performance circuit materials, such as HDI high multilayer substrates.

The invention discloses an anti-bending halogen-free flame-retardant sheath material for an elevator flat cable as well as a preparation method and application of the anti-bending halogen-free flame-retardant sheath material. The anti-bending halogen-free flame-retardant sheath material comprises the following raw materials: ethylene-propylene-diene monomer, a compatilizer, a flame retardant, a lubricant and an antioxidant, the ethylene content of the ethylene-propylene-diene monomer is 65-75%, the oil charge ratio is greater than or equal to 40 phr, and the Mooney viscosity is 40-75. The sheath material further comprises linear low density polyethylene, an initiator and a silane coupling agent. The sheath material is prepared by partially or completely grafting the linear low density polyethylene and the ethylene propylene diene monomer with the silane coupling agent under the action of the initiator before extrusion, and then conducting blending and extruding with other raw materials, or is prepared by subjecting all the materials in the raw materials to mixing, banburying and reaction and then conducting extruding. A sheath for the elevator flat cable prepared from the sheath material is simple in material formula, easy to process and low in cost, and particularly has excellent wear resistance, halogen-free flame retardance, high and low temperature resistance, excellent flexibility, excellent mechanical property and the like.