58results about How to "High bromine content" patented technology

This invention relates to a thermally stable brominated polystyrene having less than 100 ppm total Cl-, above about 68 wt % bromine and less than about 6,000 ppm hydrolyzable halide. The brominated polystyrene exhibits little or no polymer cross-linking or chain cleavage relative to the starting polystyrene.

The invention relates to a bromine-containing pentaerythritol phosphoester fire retardant and a preparation method thereof. The bromine-containing pentaerythritol phosphoester fire retardant is pentaerythritol double-spiro phosphoryl double-tribromo neopentyl alcohol ester. The preparation method of the novel bromine-containing pentaerythritol phosphoester comprises the following steps of: 1, reacting pentaerythritol with phosphorus oxychloride to generate an intermediate pentaerythritol double-spiro double-phosphorus oxychloride; and 2, reacting the pentaerythritol double-spiro phosphorus oxychloride with tribromo neopentyl alcohol to generate the pentaerythritol double-spiro phosphoryl double-tribromo neopentyl alcohol ester, wherein in the reaction, quaternary ammonium salt cation ionic liquid serves as a solvent and a catalyst. The invention discloses a new synthesis method of the bromine-containing pentaerythritol phosphoester fire retardant. The ionic liquid serves as the solvent, so the synthesis yield is improved; and a phosphorus-bromine synergistic flame retardant technique is adopted in the design of a molecular structure, so the anti-flaming efficiency of the flame retardant for high molecular materials is improved.

The invention relates to a method to prepare polystyrene bromide with compound catalyst system. Use polystyrene as the raw material, alkyl halide as solvent, with the existence of catalyst and dehydrating agent, the polystyrene bromide is made by bromination of brominating agent. Its characteristics include: the catalyst is composed of ó° family metal, ó�B family metal, tin or stibium and lewis acid, and the polystyrene bromide has large content of bromine (the largest-one can be 60%), high melt point (30-50% higher) and productivity (larger than 95%). It can be applied for antiflaming of resin such as PET, PBT and nyloen nylon.

The invention discloses low-smoke low-halogen flame-retardant conveyor belt covering glue for a coal mine, and relates to the technical field of conveyor belt covering glue. The covering glue comprises the following chemical components: natural standard rubber, styrene-butadiene rubber SBR1502, cis-butyl BR9000 rubber, polyisobutylene PB1300, an anti-aging agent, zinc oxide, magnesium oxide, stearic acid, a flow release agent, N234 carbon black, nano-aluminum hydroxide, antimony trioxide, decabromodiphenylethane, composite ceramic powder, expanded halogen-free flame-retardant IFR, a multi-purpose synergistic halogen-free flame retardant PNA220, molybdenum salt used as a smoke suppressant, an accelerator and sulfur. The low-smoke low-halogen flame-retardant conveyor belt covering glue disclosed by the invention is used under a coal mine well to meet flame-retardant performance of the conveyor belt, has excellent wear resistance and flame retardancy, and is low in smoke amount and smoketoxicity.

The invention discloses an efficient seawater desalination and comprehensive utilization method. The efficient seawater desalination and comprehensive utilization method comprise following steps: carrying out pretreatment on raw seawater, filtering using a microfiltration and/or ultrafiltration device to obtain pretreated seawater; adding a scale inhibitor into the pretreated seawater; pressurizing and conveying the pretreated seawater into a primary nanofiltration device; adjusting the pH value of obtained primary nanofiltration produced water to 3-7, pressurizing and feeding into a secondarynanofiltration device; mixing obtained primary nanofiltration concentrated water with obtained secondary nanofiltration concentrated water; adding a precipitant to react with SO4<2-> in an obtained concentrated water mixed solution to generate calcium sulfate precipitate; continuously adding lime emulsion into an obtained reacted mother liquor to react with Mg<2+> in the mother liquor to generatemagnesium hydroxide precipitate, adjusting the pH value of the residual mother liquor to 7-8, producing sodium chloride and calcium chloride through multi-effect evaporation, adjusting the pH value of obtained secondary nanofiltration produced water to 6.5-7.8, and pressurizing and introducing the secondary nanofiltration produced water into a reverse osmosis seawater desalination device. According to the efficient seawater desalination and comprehensive utilization method, seawater grading pretreatment process is adopted, the component difference of various concentrated water is fully utilized, seawater desalination and the chemical technology are combined, and the fresh water yield and the seawater utilization rate are increased.

An environment-friendly inflaming-retarding acrylonitrile-butadiene-styrene (ABS) material belongs to the technical field of high polymer materials, which comprises the following components, by weight: 50-90 parts of ABS, 10-50 parts of flame retardants, 5-20 parts of flame retardant association effect agents, 0-2 parts of antioxidants and 0-2 parts of processing agents. The ABS material is friendly to the environment and has high inflaming-retarding performance and an excellent mechanics effect.

The invention relates to a catalyst for preparing aromatic polycarboxiylic acid and mainly solves the problem that the using amount of bromine of a catalyst for preparing the aromatic polycarboxylic acid by substituting aromatic hydrocarbons by multiple alkyl groups through liquid-phase oxidation in the prior art is too high. By adopting the technical scheme, the catalyst for preparing the aromatic polycarboxylic acid is prepared from Co salt, Mn salt, IVB group metal salt, IIB group metal salt, a bromine-containing compound and an aromatic sulfonic acid compound, wherein the aromatic sulfonic acid compound is selected from at least one of aromatic disulfonic acid or aromatic disulfonate, the technical problem is well solved, and the catalyst can be used for production of preparing the aromatic polycarboxylic acid by substituting the aromatic hydrocarbons by the multiple alkyl groups through the liquid-phase oxidation.

The invention discloses a production process of brominated SBS, and belongs to the technical field of flame retardant production, and the production process comprises the following steps: adding SBS and isobutanol into a reaction kettle, heating to 20-40 DEG C, stirring, and keeping the temperature until the materials are completely dissolved; adding sodium bromide, introducing oxidizing agent chlorine, filling lime milk at the tail end of the reaction kettle to absorb unreacted chlorine in the reaction kettle, and heating to 60-75 DEG C and then stopping heating; cooling to 20 DEG C, adding acatalyst, and continuously heating to 75 DEG C to react for 1 hour, wherein the catalyst being tin tetrachloride and ferric trichloride; and cooling to room temperature, adding peroxide and alkali metal alkoxide into the material liquid after the reaction is finished, heating to 30-40 DEG C, keeping the temperature for 2 hours, filtering, washing, removing impurities, and drying to obtain the target product brominated SBS, wherein the peroxide is hydrogen peroxide, and the alkali metal alkoxide is sodium methoxide. The preparation of the brominated SBS is realized by adopting a direct bromination method, the reaction is mild, the bromine content, the yield and the thermal stability of the brominated SBS are improved, and the use requirements are met.

The invention discloses a solution three-step preparation method of a middle-low molecular weight brominated multi-block copolymer flame retardant. The preparation method comprises that brominated styrene and/or brominated acrylate and diolefin as polymerization monomers, an azo-compound or organic peroxide as an initiator and a dithioester derivative as a chain transfer agent undergo a polymerization reaction in a solvent to produce a middle-low molecular weight brominated styrene/acrylate-diolefin-styrene/acrylate triblock copolymer through a three step method, and the copolymer is brominated through a brominating agent to produce the middle-low molecular weight brominated multi-block copolymer flame retardant which is a middle-low molecular weight brominated styrene/acrylate-diolefin-styrene/acrylate triblock copolymer. The flame retardant has the characteristics of medium and low molecular weight, high bromine content and multi-block structure.

The invention relates to the technical field of EPE mats, and particularly relates to an EPE mat with high density, high elasticity and high strength. The mat comprises the following components in parts by weight: 30-80 parts of low-density polyethylene, 10-40 parts of modified polypropylene, 3-10 parts of a silane coupling agent, 0.5-3 parts of a butane foaming agent, 2-4 parts of monostearin, 1-3 parts of stearic acid, 1-5 parts of a flame retardant, and 1-5 parts of talcum powder. 10-30% of MPP Vistamaxx is added to the mats in the prior art which have the functions of ventilating, shock absorbing and cushioning, in order to enable the mats to have better strength, higher density, better elasticity, higher comfort degree during use, wear resistance, and other characteristics.

The invention discloses a novel synthetic process of bromized polyphenyl ether. The novel synthetic process comprises the following steps of (1) polymerization: putting solid tribromophenol and solid sodium methylate with the molar ratio of 1 to (0.5 to 2) into methanol, adding a catalyst, rising the temperature to 65 DEG C, carrying out backflow reaction for 4 hours, cooling for suction filtration, leaching with the methanol, and drying to obtain a POBP crude product; (2) recrystallization: weighing the POBP crude product prepared in the step (1), dissolving into tetrahydrofuran with the weight three times of that of the POBP crude product, stirring at normal temperature till the POBP crude product is completely dissolved, starting electromagnetic stirring, quickly dripping into the methanol with the weight equal to that of the tetrahydrofuran, then continuously stirring for 1 hour, carrying out suction filtration and drying for spare use; (3) bromization: taking and dissolving POBP in dichloroethane with the weight three times of that of the POBP, dripping excessive bromine at the temperature of 20-30 DEG C, rising the temperature to 75 DEG C, reacting for 4 hours, cooling to 30 DEG C, adjusting PH, carrying out suction filtration, leaching, secondary suction filtration and drying to obtain the product. The novel synthetic process disclosed by the invention has the advantages that after bromized polyphenyl ether is used, the flame retardance and the mechanical property of a resin product can be obviously enhanced, and all detection indexes of the resin product are obviously more excellent, so that the bromized polyphenyl ether can be used as a great substitute product of decabromodiphenyl ether.

The flame-retarding properties of polymeric compositions are selectively enhanced, without adversely affecting other properties of these materials to any significant degree, by including in the compositions oligomeric urethanes with high bromine content.

The invention relates to a production method of brominated lignin. The production method comprises the following four steps: I, preparing a lignin raw material; II, dissolving lignin; III, brominating the lignin; and IV, preparing the brominated lignin. The brominated lignin prepared by the method is low in production cost, environmentally friendly and better in flame-retardant effect. Primary raw materials are regenerable and inexhaustible, and an organic solvent can be recycled, so that the brominated lignin is an ideal substitute product for a tetrabromo bisphenol A flame retardant.

The invention discloses a preparation method and an application of an epoxy-terminated brominated polyether fabric flame-retardation finishing agent. A mass part ratio of epoxy-terminated brominated polyether to epoxy chloropropane to a catalyst to an initiator to a solvent is 20-30:10-20:0.1-5:0.1-10:45-60; or a mass part ratio of epoxy-terminated brominated polyether to epoxy chloropropane to the catalyst to a curing agent to the solvent is 15-25:10-15:0.1-5:20-50:38-50. The method is simple and convenient; the prepared flame-retardation finishing agent has a high content of bromine, and a permanent and excellent flame retardation effect; and a finished fabric does not contain free bromides, a polyether structure is firmly combined with the fabric, and an epoxy structure is firmly combined with a highly-polar fiber fabric, so the fabric is washable.

The invention relates to a polyamide pattern painting camouflage fabric printing process and a fabric production and processing method. The printing process is used for printing a pattern painting camouflage color, and vat grey M is added into color paste of the pattern painting camouflage color. The processing method comprises a coating finishing procedure, wherein coating finishing is performed on a waterproof set fabric printed with the pattern painting camouflage color, and a flame-retardant coating is completed according to a sequence of firstly performing bottom glue blade coating and calendaring, then performing middle glue blade coating and finally performing surface glue blade coating; during the bottom glue blade coating, the temperature of a drying oven is controlled to be close to the temperature of a cross-linking agent in a bottom glue formula, the vehicle speed is regulated and controlled, methylbenzene in polyurethane glue is completely volatilized, bottom glue is in a dried state, but part of the cross-linking agent does not completely react to form a net structure, more bottom glue is extruded into yarn gaps of a fabric during subsequent calendaring, and further the cross-linking agent reacts with the polyurethane glue and a curing process is finished. The color fastness of the fabric is stable, and the dark color migration phenomenon is reduced. The production and processing method meets the use requirements of novel equipment such as carrying tools and bulletproof vests.

The invention discloses a method for preparing brominated polypropylene. The method comprises the following steps of: 1) mixing polypropylene, water and an excessive amount of bromine, and stirring uniformly, wherein the weight ratio of polypropylene to water is (1:9)-(3:7); 2) reacting with stirring under the condition of ultraviolet irritation and/or adding of an initiating agent at the temperature of between 30 and 60 DEG C for 60 to 360 minutes; 3) after reaction, separating brominated polypropylene out. According to the method, polypropylene and bromine react in water under irritation of light, reaction conditions are optimized, the irritation of ultraviolet of which the wavelength is 280 to 460nm is used for initiating, the reaction temperature of between 30 and 50 DEG C is used, and parameters such as a mixing ratio of polypropylene to water are adopted, so that polypropylene and bromine react smoothly to obtain brominated polypropylene, the bromine content of the brominated polypropylene is correspondingly increased along with the increasing of reaction time in the reaction time of 60 to 360 minutes, and the bromination progress of brominated polypropylene can be controlled.

The invention discloses an ABS material for packaging and a preparation method thereof, and relates to the technical field of ABS materials. The material comprises the following components in parts byweight: 45-55 parts of an acrylonitrile-butadiene-styrene copolymer, 20-24 parts of vinyl acetate, 10-12 parts of ethylene, 3-5 parts of 1,2-bis(pentabromophenyl) ethane, 4-6 parts of glass fiber, 7-9 parts of magnesium hydroxide, 12-18 parts of tackifying resin, 6-10 parts of mullite powder, 5-7 parts of white carbon black, and 3-8 parts of a mixed solution. The ABS material of the scheme has excellent flame retardant properties and high-temperature resistance.

The invention relates to a colored flame retardant tetra(bromophenoxy)p-benzoquinone compound and a preparation method thereof. The structure of the compound is shown as the following formula in the specification. The preparation method includes: subjecting tetrachloro-p-benzoquinone and sodium bromophenol to substitution reaction in an organic solvent, then conducting decompression to remove theorganic solvent, adding methanol for dissolving, filtering out insoluble substances, conducting distillation concentration on the filtrate, performing cooling crystallization, and conducting filteringand drying to obtain brown powder tetra(bromophenoxy)p-benzoquinone. The compound provided by the invention has excellent flame retardant performance, also has coloring effect, and is suitable for use as a flame retardant of polyester, polyamide, polyurethane, unsaturated resin, polyolefin, rubber and other materials. Also the preparation method has the characteristics of one-step reaction, simple process and low equipment investment, and is easy to realize industrial production.