451 results about "UL 94" patented technology

A thermoplastic resin composition capable of providing a thin walled molded article whose flame retardancy with a thickness of 1.6 mm ({fraction (1/16)} inch) in accordance with an UL 94 standard is V-0 or better, and which comprises the following components [A], [B] and [C], wherein the component [B] satisfies the following conditions (B1) and/or (B2):[A]: an electrically conductive fiber;[B]: a carbon powder;[C]: a thermoplastic resin;(B1): Raman scattering intensity ratio I2/I1 is 0.55-0.8;(B2): Raman scattering intensity ratio I2/I3 is 0.54-0.8; whereI1: local maximum value of Raman scattering intensity appearing near a Raman shift of 1360 cm-1;I2: local minimum value of the Raman scattering intensity appearing near a Raman shift of 1480 cm-1;I3: local maximum value of the Raman scattering intensity appearing neat a Raman shift of 1600 cm-1.

The invention belongs to polymer modification technical field and processing technology field, and discloses a flame-retardant antistatic high-strength thermoplastic composite material and its preparation method. The material comprises (by weight share) 80-100 thermoplastic resin, 50-120 reinforcing fiber, 8-18 flame retardant, 0-5 flame retardant synergistic agent, 0.5-1.8 antistatic agent, 15-30 compatibilizer, 4-10 composite antioxidants, and 0-80 other additives. The invention also discloses the thermoplastic composite material preparation method. The inventive lame-retardant antistatic high-strength thermoplastic composite material has high tension and bending strength, high impact resistance property at low and high temperature, obvious antistatic property, high flame-retardant and fire proof performance. It can reach UL-94 V-O level standard.

A flame-retardant wick holder for a candle is made of a material having a UL-94 vertical burn test rating of at least V-0, including polymers and ceramics. The wick holder supports a wick at the bottom of a candle. The wick holder material causes the flame on the wick to extinguish when it reaches the holder, thereby preventing flashover of the residual candle fuel at the end of the candle useful life. One version of the holder has a cylindrical sleeve fit over a wick clip holding the lower end of the wick. The cylindrical holder is well adapted for use in pillar-type candles.

The invention discloses an insulating and sheathing material of ultraviolet light crosslinking expanding type phosphorus nitrogen flaming resistance polyolefine cables and a preparation method thereof. The invention is characterized in that polyethylene/PEMA and/or ethylene vinyl acetate or maleic anhydride grafted ethylene vinyl acetate or acid amide grafted ethylene vinyl acetate copolymer are taken as base, added with expanding type phosphorus nitrogen halogen-free flame retardants, light trigger, polyfunctional group cross linker and chemical inhibitor and matched with flaming retardant synergistic agent, antismoke agent and processing aid, and then squeezed out and pelleted into photo-crosslinking flame retardant cable materials; and then the flame retardant cable materials are melted and extruded on a cable conductor wire core and clad into an insulating layer and a sheathing layer; hereupon the ultraviolet light irradiation crosslinking is carried on the insulating layer or the sheathing layer. Via detecting, the oxygen index of the insulating layer or the sheathing layer is larger than 30%, the vertical flaming experiment passes through UL-94 V0 level, the tensile strength is larger than 12Mpa, the elongation at break is larger than 350%, and the electric volume resistivity is larger than 8*10 omega.cm.

A composition comprising a polyester, polycarbonate, organopolysiloxane-polycarbonate block copolymer, organophosphorus flame retardant, fluorinated polyolefin, and one or more additives. In one embodiment, the composition has an improved balance of properties, including one or more of a melt volume rate, Vicat softening temperature, notched Izod impact strength and a UL 94 flammability rating.

The invention provides an efficient halogen-free flame retardant rubber system which comprises the following components in parts by weight: 100 parts of rubber, 30-50 parts of a fortifier, 0-10 parts of a structural controller, 0.5-2 parts of a vulcanizing agent, 0.1-2 parts of an accelerant, 1-20 parts of a flame retardant and 1-20 parts of a synergist. The tensile strength of the rubber system is 5.4-33.8MPa, LOI is 28.9-45.5% and UL-94 is V-1 to V-0. The invention further provides a preparation method of the system. According to the rubber system provided by the invention, as the flame retardant and the flame retardant synergist which are matched with the rubber system, since the addition is a little, mechanical property is hardly affected and a good flame retardant effect can be further realized.

The invention provides a phosphorus-containing flame retardant composition, including: a hypophosphite compound, a DOPO derivative and a polyphosphazene compound. The composition as a flame retardant can play a synergistic effect of several phosphorus-containing compounds, realizes halogen-free flame retardance under small addition amount and reaches level V-0. The invention also provides a contains a polyphenyl ether resin composition containing the above phosphorus-containing flame retardant compositions and a prepreg and a copper clad laminated board prepared from the same. After curing, the polyphenyl ether resin composition achieves flame retardance of V-0 grade under the condition to which the halogen flame retardant does not apply and keeps good dielectric property and heat resistance of polyphenyl ether resin; the prepreg and copper clad laminated board made from the composition have good dielectric property and heat resistance, and realize halogen-free flame retardance to UL 94-V0 grade while ensuring excellent heat resistance and dielectric property; and the composition is applicable to the field of high speed and high frequency printed circuit board, and is in line with the future requirements of green and environmental protection.

The invention relates to a composition for a flame-retardant polyvinyl chloride (PVC) plastic foam board, and the flame-retardant PVC plastic foam board produced by a double screw extrusion method. The composition comprises the following components in part by weight: 100 parts of polyvinyl chloride, 5 to 25 parts of polyacrylate copolymer, 0 to 30 parts of chlorinated polyethylene, 0 to 30 parts of chlorinated polyvinyl chloride, 20 to 70 parts of flame retardant and smoke suppression agent, and 0 to 5 part of plasticizer, and also comprises a resin melt reinforcing agent and additives such as a foaming agent, a lubricating agent and a stabilizing agent and the like. After the produced flame-retardant PVC plastic foam board is detected by Shanghai Building Material and Component Quality Surveillance Office and State Laboratory of Fire Science (University of Science and Technology of China, Hefei), the oxygen index is more than or equal to 32, the smoke density grade is less than or equal to 75, the average combustion time is less than or equal to 30 seconds, the heat release rate is less than 250W/g, the heat conductivity is 0.047W/m.K, and the flame-retardant PVC plastic foam board meets the B1 requirement of GB/T8624-1997, and meets the V-0 standard of UL-94.

The invention discloses a zero-halogen flame-retardant thermoplastic polyurethane elastomer sheath material and a preparation method thereof. The zero-halogen flame-retardant thermoplastic polyurethane elastomer sheath material is prepared from the following raw material components in parts by weight: 50-80 parts of polyurethane, 10-30 parts of zero-halogen flame retardant, 10-20 parts of zero-halogen smoke suppressant, 5-20 parts of processing modifier, 0.2+/-0.05 part of processing auxiliary agent, 0.2+/-0.05 part of antioxidant and 0.2+/-0.05 part of ultraviolet resistant. Compared with the prior art, the zero-halogen flame-retardant thermoplastic polyurethane elastomer sheath material prepared by the invention has the advantages of wider processing temperature range, ultrahigh physical and mechanical properties and flame retardant property of UL-94 and V-0 level.

The invention relates to a PBT and ABS flame- proof material. The component and their weight proportion are follows: PBT 30-70%, ABS 10-50%, AS 1-20%, AS-GMA 1-20%, montmorillonite 1-20%, flame- proof agent 1-20%, and anti-oxidant 0.1-1%. The PBT and ABS flame- proof material possesses high flame- proof performance, the flame- proof grade can reach V0 class of UL 94 standard, and it aslo improves material performance, especially the rigidity and thermal resistance, and the size stability is good. It is suited to inject and shape electrical apparatus that requires environmental protectio and flame proof.

A polycarbonate containing composition comprising a peak melt viscosity of at least 8,000 poise when measured using a parallel plate melt rheology test at a heating rate of 10° C./min at a temperature of between about 350° C. to about 450° C., and wherein a molded article of the composition has a UL 94 VO rating at a thickness of 1.0 mm, 1.5 mm, 2.0 mm, or between 1.0 mm and 2.0 mm is disclosed.

The invention relates to non-halogen flame-resistant glass fiber reinforced epoxy molding compound. According to the weight parts, the material of the non-halogen flame-resistant glass fiber reinforced epoxy molding compound comprises 20 parts to 25 parts of epoxy resin, 7 parts to 9 parts of phenolic resin, 1.4 parts to 3.4 parts of curing agent, 60 parts to 75 parts of mineral filler, 4 parts to 7.5 parts of phosphate, 0.8 parts to 2 parts of metal oxide, 1.8 parts to 2.5 parts of mould releasing agent and 15 parts to 20 parts of reinforced fiber. The non-halogen flame-resistant glass fiber reinforced epoxy molding compound has advantages that because halogen is not contained in the formulation, when being burnt, noxious gas and harmful gas can not be generated, and the physical safety and the environmental protection can be ensured; the shrinkage ratio is 0.4 percent to 0.7 percent, the bending strength is 105 to 120 MPa, the notched impact strength is greater than 2.2 KJ per m<2>, the resistance is 1X10<12> Omega, the proof tracking index is greater than 600 V, the arc resistance is greater than 180 s, the electrical strength is greater than 10 MV per m, the flame-resistant performance reaches grade UL-94-V-0 (1.6 mm), and the non-halogen flame-resistant glass fiber reinforced epoxy molding compound can be suitable for the sealing material for manufacturing automobile commutators and electronic products.

This invention relates to an improved flame retardant honeycomb comprising high modulus fiber and a flame retardant thermoplastic binder having a melt point of from 120° C. to 350° C. and a limiting oxygen index of 26 or greater, methods for making the honeycomb, and articles comprising the honeycomb. In a preferred embodiment the paper in the honeycomb has a flame classification of UL-94 V-0.

The invention discloses a flame retardant containing phosphorus, nitrogen and sulfur and used for epoxy resin and a preparation method of the flame retardant. Firstly, DOPO and aminothiazole are taken as reaction raw materials and subjected to an Atherton-Todd reaction for preparation of the flame retardant containing phosphorus, nitrogen and sulfur. The process steps of the method are simple, the yield and the purity of the flame retardant are high, and the post-treatment process is simple and convenient. The flame retardant containing phosphorus, nitrogen and sulfur and prepared with the method is used for modifying cured epoxy resin and has good compatibility with epoxy resin, and the obtained cured flame-retardant epoxy resin has excellent flame retardancy; when the phosphorus content of the epoxy curing system reaches 0.43wt%-1.23wt%, the vertical burning grade can pass UL-94 V-0 level, and the limit oxygen index is as high as 36%.

The invention discloses a halogen-free high-efficiency flame retardant composition and a preparation method thereof. The halogen-free high-efficiency flame retardant composition is prepared from the following components in percentage by mass: 10-80% of phenyl melamine carboxyethyl phenyl phosphinic acid condensation compound, 15-70% of melamine and/or derivative thereof and 5-20% of organic phosphate. The halogen-free flame retardant composition can be used for flame retarding of various polyolefin, nylon, polyurethane, polyester and other synthetic materials and textiles, and is particularly suitable for polyester and nylon engineering plastic; and by the addition of 12wt% of the flame retardant composition to polybutylene terephthalate (PBT) resin, the flame-retarding level can reach UL 94 V-0 (1.6 mm). The flame retardant composition has the characteristics of high flame retarding efficiency, good fluidity, no precipitation and the like, and can meet the use requirements of flame-retardant resin for electric appliance shells and supports, electronic and electric device connectors and the like.

Provided by the invention is a non-halogen flame-retardant thermoplastic resin composition not requiring crosslinking with a peroxide, having excellent in moldability, and moreover, having high flame-retardancy to pass the test for V-0 grade of the UL-94. standards The non-halogen flame-retardant thermoplastic resin composition comprises, as a uniform blend: (A) 100 parts by mass of a thermoplastic resin other than polycarbonate and polyphenylene ether resins, (B) 10 to 300 parts by mass of an inorganic powder, (C) 1 to 50 parts by mass of an organopolysiloxane having a specified structure, and (D) 0.01 to 10 parts by mass of an organic compound having a specified structure.

The invention discloses a preparation method for high-mechanical performance halogen-free flame-retardant nylon 66 composite materials, comprising the following steps: (1) weighing; (2) mixing; (3) blending and extruding. The invention also discloses a composite material prepared with the method; the composite material has the following components: nylon 66, short glass fibers, main antioxidant, auxiliary antioxidant, compound flame retardant and lubricant. The method of the invention has the advantages that the composite material has the fire-retardant performance up to UL 94 V-0 (0.8mm) level, and has more prominent mechanical properties than the existing halogen-free flame retardant system, with equivalent mechanical properties with the halogen-containing flame retardant system; therefore, the composite material of the invention can completely replace the existing halogen-containing flame-retardant products and halogen-free flame-retardant products, with easy preparation method and easy operation. The high-mechanical performance halogen-free flame-retardant nylon composite material can be widely used in home appliances, electronics parts, auto parts, and so on.

The invention discloses high-retardant polyamide which is prepared from the following components in percentage by weight through cross blending fusion: 42-85% of polyamide, 10-25% of branched chain alkyl phosphinic acid and melamine derivatives, 0.5-3% of fire-retardant synergist, and 0-30% of alkali-free glass fiber, wherein the mass ratio in percentage of branched chain alkyl phosphinic acid tothe melamine derivatives is (2:1)-(4:1), or the mass percentage of the melamine derivatives is 0, the oxygen index of the high-retardant polyamide is 27.3-32.2%, and the vertical flame UL-94 of a test sample with the thickness of 1.6mm is V-1, and the vertical flame UL-94 of a test sample with the thickness of 0.8mm is NR-(V-0). The high-retardant polyamide provided by the invention is obtained through adding a retardant system of a novel branched chain alkyl phosphinic acid fire retardant, a nitrogen or phosphorous compound and the formulation of the synergist, not only has an excellent fireretardant effect, but also can be used for lowering the cost through reducing the additive amount of the fire retardant.

The invention discloses a halogen-free flame retardant ethylene propylene diene monomer (EPDM) material and a preparation method thereof. The halogen-free flame retardant EPDM material comprises the following components in parts by mass: 100 parts of EPDM, 20-50 parts of intumescent halogen-free retardant agent, 0.1-10 parts of cross linking agent, 8-50 parts of phosphonate, 0.1-10 parts of EPDM/montmorillonite nanocomposite and 0.1-7 parts of filler. Because the material adopts intumescen halogen-free retardant agent and EPDM/ montmorillonite nanocomposite in the combination, the EPDM material has favourable fire retardance and obtains the standard of UL-94 V-0 level.

The invention relates to a halogen free polyethylene composition for preparing pipes and a preparation method thereof. The composition comprises the following components by weight portion: 11 to 45 portions of halogen free fire retardant, 0.1 to 8 portions of antistatic agent, and 45 to 85 portions of polyethylene,, wherein the halogen free fire retardant is compounded by an expansion type fire retardant and a phosphonate ester fire retardant. The composition is characterized by no halogen content, environmental friendliness and good fire retardation. The composition can reach the V-0 level standards of UL-94 and have excellent antistatic property and good mechanical property. Therefore, the composition is the plastic combined material for preparing the pipes applied to hazardous operations such as coal mine, underground mining, water supply and drainage, gas transmission, and the like.

The invention discloses a phosphorus-nitrogen system biology based flame retardant as well as a synthesis method and application thereof. The method comprises the following steps: completely dissolving a raw material 1 into an organic solvent at room temperature, adding a raw material 2 into the mixture, uniformly stirring through magnetic force, rising the temperature to 25 to 100 DEG C, and reacting for 2 to 12h; keeping the current reaction temperature, adding a phosphorus-containing material 3 into a reaction flask, ensuring that reaction is continued for 4 to 12 at 25 to 80 DEG C after the phosphorus-containing material 3 is completely dissolved. The flame retardant is simple in synthesis technology, small in pollution, low in toxicity, simple in aftertreatment, and very high in yieldand degree of purity, belongs to a melting point compound, has excellent processing property and excellent flame retardant efficiency, can not only obtain excellent flame retardant effect in epoxy resin, but also be properly applied to polyester compounds (polylactic acid), can obviously improve the UL-94 degree and oxygen index of the polylactic acid, and has little influence on the heat stability and mechanical property of flame retardant composite materials.

The invention relates to an environmentally-friendly ultralight flame-retardant rubber sole material and a manufacturing method thereof, and particularly relates to a manufacturing method of footwear product soles with high requirements on light weight and flame retardant property. The environmentally-friendly ultralight flame-retardant rubber sole material comprises chlorosulfonated polyethylene rubbers, a reinforcing agent, an active agent, a plasticizer, a foaming agent, a synergistic foaming agent, a flame retardant, a synergistic flame retardant, a vulcanizing agent and a vulcanization accelerator. According to the invention, through the screening and optimization of a series of formulas of the reinforcing agent, the plasticizer, the vulcanizing agent, the foaming agent, the synergistic foaming agent and the synergistic flame retardant, an ultralight flame-retardant sole material with a relative density of 0.3-0.5 g/cm3 is prepared, wherein in a flame retardant property test, the limit oxygen index of the sole material is greater than or equal to 34.5%, and the UL-94 reaches level V-a. The material has the following advantages: soles are lighter in weight and excellent in flame retardant property, and abandoned soles do not release toxic nitrosamine, polybrominated dibenzo-p-dioxins (PBDD) and polybrominated diphenyl furans (PBDF) in the process of burning.

The invention discloses an environment-friendly flame retardant, which comprises the following raw materials in part by weight: 10 to 25 parts of expanded graphite, 20 to 35 parts of starch, 5 to 10 parts of phosphoric acid, 5 to 15 parts of melamine phosphate, 5 to 15 parts of melamine, 5 to 10 parts of urea, 5 to 10 parts of aluminium hydroxide, 5 to 8 parts of antimonous oxide, 2 to 5 parts of manganese oxide, 2 to 5 parts of nickel oxide, 2 to 5 parts of zinc oxide and 3 to 5 parts of coupling agents. According to the environment-friendly flame retardant, organic components and inorganic components are compounded for flame retarding, so that the flame retarding efficiency is high, and when the flame retardant is used for retarding flaming of polyolefin, and the minimum adding amount is 20 percent, a V-0 flame retarding level in a UL-94 testing method can be reached; the compatibility of the flame retardant and a polyolefin plastic substrate is high, so that the flame retardant can be uniformly scattered in a material to be subjected to flame retarding and has relatively high appetency; and the flame retardant has high water resistance and heat stability, so that the processing requirement of polyolefin plastic is fully met.