460results about How to "Improve flame resistance" patented technology

A flame-resistant microcapsule that comprises a core comprising a phase change material and a wall material encapsulating the core. The microcapsules includes at least one of: a flame retardant applied to the wall material and a phase change material having a boiling point of about 230° C. to about 420° C. to provided enhanced flame resistance. The phase change material may have a boiling point of about 280° C. to about 400° C. or about 300° C. to about 390° C.

The present invention relates to the foams of the polyvinyl chloride nanocomposites comprising of polyvinyl chloride, layered inorganic compounds, and foaming agents. They are effective in that they have superior mechanical strength and non-flammability even with a low specific gravity; demostrates a high foaming efficiency even with a small amount of a foaming agent; and have an even microcellular structure.

The invention relates to the technical field of polyvinyl chloride composite materials, in particular to high heat resisting and high abrasion resistant polyvinyl chloride (PVC) modified materials and a preparation method of the high heat resisting and high abrasion resistant PVC modified materials. The modified materials comprise the following raw materials, by weight, 80-120 parts of PVC resin, 25-60 parts of stuffing bulking agents, 21-60 parts of plasticizer, 1-10 parts of chlorinated polyvinyl chloride, 1-10 parts of fire retardant, 1-10 parts of stabilizer, 1-10 parts of impact modifier and 0.2-2 parts of lubricating agents. The raw materials are weighed according to parts by weight and are blended. After being blended, the raw materials are extruded out to be granulated through a double-screw extruder to produce the modified materials. The modified materials are good in heat resisting property and abrasion resistant property, environment-friendly, high in strength, good in flame retardant effect, strong in compressing property and toughness, good in processing property and good in comprehensive property. The preparation method is simple in craft, convenient to operate and control, stable in quality and high in production efficiency, and can be produced in a large scale industrialization mode.

The invention relates to resin combination with high thermal conductivity and glass transition temperature used for a printed circuit board. According to the weight percentage, the resin combination comprises brominated epoxy resin occupying 20 percent to 70 percent, hardening agent occupying 1 percent to 10 percent, accelerating agent occupying 0.1 percent to 10 percent, inorganic powder occupying 0 percent to 20 percent, high heat conducting powder occupying 5 percent to 85 percent, and processing auxiliary agent occupying 0 percent to 10 percent. The resin combination has the advantages of high glass transition temperature and heat conducting performance, excellent thermal resistance and flame resistance, which can be applied to the heat conducting insulating layer of the printed circuit board after being made into a high heat conducting preimpregnated body through a containing and soaking way or into a high heat conducting coating through a coating way, thus the printed circuit board has high heat conducting performance, and the heat quantity generated by the operation of the electronic elements on the printed circuit board can be rapidly dissipated to enhance the service life and the stability of the electronic elements.

A dustproof and waterproof multipurpose LED-light power source assembly comprises a heat sink, a heat-dispersal fan, a circuit board driver module, an LED light source module, a power-source casing top cover and a power-source casing bottom cover. The LED light source module comprises plural LED chips and an LED heat-dispersing substrate. The heat-dispersal fan is a dustproof and waterproof fan. The heat sink comprises a baseboard to which the LED heat-dispersing substrate is fixedly connected and conducts dispersed heat. At the center of the top of a heat-dispersal member, a space is provided to accommodate the heat-dispersal fan. The power-source casing bottom cover is positioned above the heat-dispersal fan and is fixedly connected to the heat sink. The power-source casing top cover and the power-source casing bottom cover are hermetically connected one to the other. A waterproof bolt assembly is connected to the top of the power-source casing top cover.

The invention relates to a resin composition with high thermal conductivity, no halogen and fire retardance, which is applied to a printed circuit board and used as a thermal-conduction insulating layer. The resin composition comprises 5 to 70 weight percent of phosphorus epoxy resin, 0 to 50 weight percent of epoxy resin with a plurality of functional groups or double functional groups, 1 to 20 weight percent of hardening agent, 0.01 to 10 weight percent of accelerant, 0 to 20 weight percent of inorganic powder, 5 to 85 weight percent of high thermal-conduction powder and 0 to 10 weight percent of processing additive; in addition to high thermal conductivity, excellent thermal resistance and fire retardance, the resin composition does not contain a halogenous fire retardant and does not generate toxic or corrosive gas in combustion and is an environment-friendly material; the resin composition can be prepared into a pre-impregnated body with high thermal conductivity through an impregnation method or prepared into a coating material with high thermal conductivity by a coating method; the pre-impregnated body or the coating material is applied as the thermal-conduction insulating layer of the printed circuit board so that the printed circuit board has high thermal conductivity and is favorable for rapidly dissipating heat generated in the operation of electronic components of the printed circuit board to prolong the life service and the stability of the electronic components.

The present invention is to provide an epoxy resin composition uniformly containing a large amount of inorganic fillers, excellent in heat resistance and flame resistance, and having good impregnation into a base material, and a prepreg using the epoxy resin composition, having good tackiness, and being easy in handling. Furthermore, it is to provide a printed wiring board using a metal-clad laminate formed using the prepreg and/or the prepreg or the epoxy resin composition, capable of easily conducting an ENEPIG process, and a semiconductor device using the printed wiring board, excellent in performances. An epoxy resin composition comprises a solid epoxy resin, a silica nanoparticle having an average particle diameter of 1 nm or more and 100 nm or less, and a silica particle having an average particle diameter larger than that of the silica nanoparticle, in the range of 0.1 μm or more and 5.0 μm or less.

The invention discloses a high-temperature-resistant rubber sealing ring for automobiles. The high-temperature-resistant rubber sealing ring comprises the following raw materials in parts by weight: 70-90 parts of ethylene-propylene-diene-terpolymer rubber, 10-30 parts of chloroprene rubber, 1-4 parts of an anti-aging agent, 0.8-1.5 parts of active zinc oxide, 0.2-0.4 part of magnesium oxide, 0.5-1.0 part of calcium oxide, 0.6-1.5 parts of butyltin mercaptide, 30-40 parts of modified kaolin, 10-15 parts of magnesium methacrylate, 1-3 parts of a promoter, 6-10 parts of soybean oil, 1-2 parts of ethyl methacrylate, 40-80 parts of paraffin oil, 0.2-0.5 part of triallyl phosphate, 1.0-1.5 parts of a crosslinking agent BIBP, 0.5-1.2 parts of an assistant crosslinking agent TAIC, 0.3-0.5 part of microcrystalline wax, 2-3 parts of a vulcanizing agent and 0.5-1 part of phthalic anhydride. The sealing ring disclosed by the invention has strong weather resistance, corrosion resistance and ozone resistance, and can be suitable for being used as the high-temperature-resistant rubber sealing ring for the automobiles.

The invention relates to a sectional material for houses and floors, which comprises two layers of different materials which contain synthetic resin. The ratios of main components of the inner layer material of the sectional material by weight are 100 portions of PVC, 0.8 to 1 portion of foaming agent, 5 to 6 portions of composite stabilizing agent and 7 to 9 portions of regulator; the ratios of the main components of the outer layer material by weight are PVC, plant material, composite stabilizing agent, pigment and adhesive; the two layer materials are pressed, molded and processed to become the sectional material. By adopting the ratios and the processing method provided by the invention, the sectional material produced has a color and a texture which are similar to the wood and a relatively high structural intensity, meanwhile the application of plant materials, such as wood powder, etc., are reduced in the production, thereby protecting the environment.

A polyimide/polyacrylonitrile blended fiber and a preparation method belong to the technical field of blended fibers. The preparation method includes respectively preparing PAA (poly acrylic acid) liquor and PAN (polyacrylonitrile) liquor; blending the PAN liquor with the mass ranging from 3% to 40% of that of total PAA/PAN blended components and the PAA liquor to obtain spinning liquid precursor; removing bubbles in a vacuum manner, realizing wet-method spinning to obtain a PAA/PAN as-formed blended fiber; and realizing heat treatment for the as-formed blended fiber, removing moisture and solvent, completing a pre-oxidation process for the PAN component in the blended fiber and an imide cyclization process for the poly acrylic acid in the blended fiber, and obtaining the PI (polyimide)/PAN fiber. By means of comparing performances of a single component and the blended fiber under identical treatment conditions, a blended system capable of keeping an excellent mechanical performance of the fiber is obtained, and an excellent economic benefit is realized as compared with a PI fiber.

The invention discloses a preparation method of polyether glycol. The method comprises the following step: preparing the polyether glycol from compound initiator, polyether glycol synthetic catalyst and propylene oxide by using a conventional polyether glycol synthesis method, wherein the compound initiator comprises the following components in parts by weight: 0.04-0.08 part of glycerol, 0.2-0.4 part of dihydroxymethylphenol and 0.56-0.72 part of sucrose; and the mass ratio of the propylene oxide to the compound initiator is 1.7-2.3. The invention also discloses polyether glycol prepared by using the method, a method for preparing polyurethane rigid foamed plastic from the polyether glycol, and polyurethane rigid foamed plastic. The polyether glycol disclosed by the invention has the advantages of low viscosity and high functionality, and has favorable processing properties when being used as a raw material. The polyurethane rigid foamed plastic prepared from the polyether glycol has the advantages of excellent high-temperature resistance, high flame resistance and high compression strength.

A varnish composition includes composition (A): an epoxy resin, composition (B): a hardener, composition (C): an accelerator, composition (D): phosphor-containing flame retardant, and composition (E): fillers, wherein composition (A) includes composition (A-1): phosphor-containing epoxy resin, phosphor-containing and silicon-containing epoxy resin, or a mixture thereof; composition (A-2): dicyclopentadiene epoxy resin; and composition (A-3): oxazolidone epoxy resin.

The invention relates to a fire retardation three-proofing lacquer and a preparation method thereof, wherein the raw materials comprise, by weight, 10-30% of an alkyd resin, 5-20% of an acrylic ester resin, 5-20% of an organic silicon resin, 30-80% of solvent, 0.2-2% of a catalyst, 0.2-2% of a fire retardation agent, and 0.2-2%o of a defoamer. The fire retardation three-proofing lacquer of the present invention is used for production of electronic components, integrated circuits, electronic packaging, LED packaging, printed circuit boards and the like, and has effects of improvement of reliability and service life of circuit boards.

A water-soluble, flame retardant polyester resin is obtained by a condensation reaction or a polycondensation reaction of a dicarboxylic-acid component, a glycol component, a water-solubility imparting component and a reactive phosphorus-containing compound such that a ratio of the water-solubility imparting component in a total of the dicarboxylic-acid component and the water-solubility imparting component is in a range of 1 to 60 mol %. Since this polyester resin can be dissolved in a solvent by allowing a halogen-free, phosphorus-containing polyester with excellent flame resistance to have water solubility, it is possible to improve applicability and eliminate problems of working environment and environmental destruction resulting from organic solvents. In addition, even when treating substrates such as fibers and PET films with the polyester resin, there is no deterioration of these substrates.

The invention provides a halogen-free non-phosphorization flame-retardant epoxy resin composition and a preparation method thereof. The preparation method comprises the following steps of: premixing the common epoxy resin, flame-retardant epoxy resin, a curing agent, a curing accelerator, a flame-retardant synergistic agent and an inorganic filler; melting, mixing and extruding; and crushing and sieving to prepare the halogen-free non-phosphorization flame-retardant epoxy resin composition. The flame-retardant epoxy resin composition does not contain harmful substances such as halogen, diantimony trioxide, phosphorus and the like, has excellent fire resistance which can reach UL94V-O grade flame-retardant standard and high electrical property, can be applied in the fields of electronic packaging and copper-clad laminate.

The invention relates to a method for manufacturing black bricks, in particular to a method for manufacturing large-size black bricks, which solves the problem that the traditional baking process of black bricks in conventional sizes cannot manufacture large-size black bricks. Each large-size black brick respectively has the length, the width, and the height of 4.2 m, 2 m and 1 m, and the large-size black brick is made from the following raw materials in percentage by weight: 90 percent of clay, 0.5 percent of coal gangue powder, 7.5 percent of coal powder, 1 percent of coal slime, 0.5 percent of iron powder and 0.5 percent of glass powder. The manufacture process comprises the working procedures of kneading mud, making blanks, drying, loading the blanks into a kiln and roasting. During making the blanks, two fine iron wire nets are put among the brick blanks at intervals; during loading the blanks into the kiln, black bricks in the conventional sizes are palletized and clamped on the peripheries and the upper parts of the large-size black bricks; and during roasting, the brick blanks are roasted twice according to a roasting method of the black bricks in the conventional sizes. The large-size black bricks manufactured by the method have higher strength and no cracks and breakages and fully meet the requirement of brick carving.

A thermoplastic resin composition that can have improved flowability of the present invention comprises (A) about 1 to about 98% by weight of a functional group-containing vinyl copolymer resin reactive with polyester; (B) about 1 to about 98% by weight of an aromatic vinyl graft copolymer resin; (C) about 1 to about 98% by weight of a polyester resin; and (D) about 0.5 to about 30 parts by weight of a bromodiphenyl ethane mixture, based on the total weight of a base resin comprising (A), (B) and (C). The resin composition of the present invention can have flame retardancy, excellent impact resistance, and improved flowablity.

The invention discloses a high-toughness melamine resin and a preparing method thereof. An elastomer is adopted to be added in melamine resin with the form of powder and emulsion, the impact strength of melamine resin is improved, and high-toughness melamine resin is prepared. The preparing method of melamine resin comprises the steps of placing 40-85 parts of melamine-formaldehyde resin prepolymer, 5-50 parts of fiber, 0.1-0.5 part of curing agent, 5-30 parts of elastomer and 0.1-1 part of flowable agent into a kneading machine at 25-80 DEG C to be subjected to kneading for 30-90 min, afterwards placing kneaded materials into a stove at 70-130 DEG C to be subjected to stoving and dehydration, and then conducting ball milling on the kneaded materials and 3-10 parts of inorganic filler in a ball mill for 4-20 h to obtain high-roughness melamine powder. The other preparing method comprises the steps of placing prepolymer, the fiber, the curing agent and the elastomer into the kneading machine to be subjected to kneading, afterwards putting the kneaded materials into the stove to be subjected to stoving and dehydration to obtain irregular blocky solid, and then conducting ball milling on the blocky solid, inorganic filler and elastomer powder in the ball mill according to matching to obtain the high-roughness melamine powder. The preparation of the high-roughness melamine material is beneficial to reducing the breakage rate of a melamine product in use, and prolonging the service life of the melamine product.

The invention relates to a method for preparing heterotypic meta-aromatic polyamide (MPIA) fiber with non-circular section. The meta-aromatic polyamide solution is squeezed directly into the low temperature coagulation bath containing surfactant after being neutralized and filtered, and the spinning shaped spun filament is carried out hot water stretching, washing and dry heat stretching to obtain finished MPIA fiber with non-circular section. The MPIA fiber with non-circular section obtained according to the method has larger specific surface area, more excellent textile processing performance, and is more suitable to fabricate high-temperature resistant synthetic fiber papers.

The invention discloses an electric vehicle charging pile cable, and belongs to the power cable technical field; the electric vehicle charging pile cable comprises a feed temperature optical fiber, two main power lines, a ground line, two auxiliary power lines, a pair of charging connection confirm lines, and a pair of charging communication lines; the wire cores are twisted to form a cable, and gaps are filled with filling material; the cable is wrapped in sequence from inside-out by a wrapping tape, an inner sheath, a shield layer and an outer sheath. The electric vehicle charging pile cable is excellent in flexibility, highly flame retardant, wear resistant, high in weatherability and anti-UV property, can feed back temperature control of the cable and contact points, thus preventing fire hazard caused by overheating; a waterstop rope is water resistant, so cable water tree and creep deformation can be prevented, thus prolonging life of the charging pile cable.

The invention relates to a foaming material, in particular to an ethylene propylene diene monomer and chloroprene rubber blended secondary closed pore foaming material and a preparation method thereof. The foaming material is prepared from the following raw materials in parts by weight: 45-100 parts of ethylene propylene diene monomer, 45-100 parts of chloroprene rubber, 8-15 parts of carbon black, 10-18 parts of a fire retardant, 8-15 parts of magnesium powder, 10-35 parts of windsor clay, 12-25 parts of active light calcium, 25-35 parts of naphthenic oil, 0.8-2.5 parts of an anti-aging agent, 1.5-3.5 parts of an antioxidant, 2-4 parts of a foaming agent, 1.4-1.8 parts of a foaming auxiliary, 1-2 parts of a vulcanization accelerator, 2.5-5.2 parts of an activating agent, 2-6 parts of zinc oxide, 1-2 parts of a dispersing agent, and 1-2.5 parts of stearic acid. Compared with the prior art, the foaming material disclosed by the invention greatly reduces the content of halogen, meets the environment-friendly requirement and has good performances of resisting flame, aging, oil and chemical reagents at the same time.