1259 results about "Isocyanuric acid" patented technology

The invention belongs to the technical field of heavy metal wastewater treatment, and in particular relates to cyanuric acid-based heavy metal chelating flocculant and a preparation method thereof. In the method, cyanuric acid is adopted as a basic framework; and polyamine is connected to a molecule through epoxy chloropropane, and reacts with carbon disulfide in an alkaline condition to prepare the heavy metal chelating flocculant of which the molecule contains a plurality of branches and a plurality of dithio formate functional groups. The method overcomes the defects that the conventional monofunctional flocculant has small flocculating body, and poor precipitation performance, and when polymeric chelant chelates heavy metals, steric clash is great, and the residual heavy metal ion concentration is difficult to meet the standard and the like. The flocculant has the advantages of simple preparation process, mild condition, easy operation and control, high yield, high raw material utilization, less three waste discharge and environmental protection of technical process, convenient popularization and industrialization realization and suitability for treatment of various types of heavy metal wastewater, such as smelting wastewater, electroplating wastewater, nonferrous metals processing wastewater, mining and beneficiating wastewater, printed circuit board wastewater, battery plants and the like.

A hard coat film of the present invention comprises a hard coat layer, which is a cured coat layer, provided on at least one side of a transparent plastic film substrate, wherein a hard coat layer forming material comprises urethane acrylate (A); isocyanuric acid acrylate (B) and inorganic ultrafine particles (C), and has a high hardness and suppresses curling due to cracking and cure shrinkage.

An object of the present invention is to provide a polysiloxane compound that can be developed in an aqueous alkali solution and can yield a cured product or thin film having superior heat-resistant transparency and insulating properties, a curable composition thereof, and a thin film transistor provided with a passivation layer or gate insulator using the same, and the present invention relates to a polysiloxane compound having at least one photopolymerizable functional group in a molecule thereof, and having at least one member selected from the group consisting of an isocyanuric acid backbone structure, a phenolic hydroxyl group and a carboxyl group within the same molecule, to a curable composition containing the polysiloxane compound, and to a cured product thereof.

A flame-retardant resin composition comprises a base resin (e.g., a polyester-series resin), a flame retardant (A) comprising a salt of an amino group-containing triazine compound with a sulfuric acid and / or a sulfonic acid, a flame-retardant auxiliary (B). The flame-retardant auxiliary (B) includes an aromatic resin, acyclic urea-series compound or a derivative thereof [e.g., acetyleneurea, uric acid, a salt of melamine or a condensate thereof (e.g., melam, melem, and melon) with cyanuric acid], an amino group-containing triazine compound (e.g., melamine or a condensate thereof), and / or an inorganic metal-series compound (e.g., a metal salt of an oxygen acid having no sulfur atom, a metal oxide, a metal hydroxide, and a metal sulfide). The present invention provides a flame-retardant resin composition to which flame retardancy is imparted without using a halogen-series flame retardant and an organic phosphorus-series flame retardant.

The invention relates to a quick, energy-saving and high-yield preparation method of quasi-graphite-structure carbon nitride catalysis materials and application of the materials, belonging to the field of preparation and application of catalysis materials. According to the preparation process, one or multiple nitrogen-rich small organic molecules of urea, melamine, thiourea, cyanamide, dicyanamide, cyanuric chloride and cyanuric acid is / are taken as raw materials, a simple metal substance, a metallic oxide, a metal sulfide and a metal chloride are taken as microwave absorbers, microwave is taken as a heating source, and under the condition of radiation of microwave, the quasi-graphite-structure carbon nitride material can be quickly prepared. The prepared carbon nitride material has a large specific area and crystallinity and has high photocatalytic water decomposition hydrogen production performance and organic pollutant degradation performance. The preparation method provided by the invention is short in time, small in energy consumption, high in production efficiency and simple in process, does not have harsh preparation conditions, is easy to operate and has wide application prospect.

The invention discloses a sterilization compound containing chloroisobromine cyanuric acid, comprising a raw medicine formed by compounding a sterilizing agent A and a sterilizing agent B, wherein the proportion of the sterilizing agent A to the sterilizing agent B is (1-80):(1-80); the sterilizing agent A is the chloroisobromine cyanuric acid; and the sterilizing agent B is any one of the following types of the sterilizing agents: copper preparations, methoxy acrylic esters, triazoles, amides, benzimidazoles, thiocarbamates, substituted benzenes, dicarboximides, phthalimides, imidazoles, morpholines, carbamates, oxazoles and the like. The sterilization compound is formed by compounding the sterilizing agent A and the sterilizing agent B so that not only a sterilization spectrum is enlarged, but also the drug resistance of bacteria is slowed; and the sterilization compound has an obvious lasting synergistic effect.

The invention mainly aims to provide a preparation method of electronic grade triglycidyl isocyanurate (TGIC). In order to realize the aim, the technical scheme in the invention is as follows: the preparation method of electronic grade TGIC comprises the following steps: a) adding epichlorohydrin, cyanuric acid, quaternary ammonium salt phase transfer catalyst and water according to a ratio, heating and stirring to react; b) adding flake caustic soda in the reaction system obtained in the step a) to react, then performing pressure filtration to remove solid salt; and c) performing vacuum distillation after the reaction, then using a high vacuum film evaporator to distill and remove epichlorohydrin, crystallizing the coarse product, centrifuging, grinding, and drying to obtain electronic grade TGIC. According to the treatment method provided by the invention, the purity of the TGIC product can be effectively increased, and the purity of TGIC can be increased from 92% to more than 99%, which reaches the electronic grade.

The present invention provides a composite flame retardant which can be produced without using any toxic metal such as antimony trioxide or any halogen such as bromine and chlorine and can exhibit excellent flame retardancy compared with magnesium hydroxide when added in a smaller amount; and a flame retardant resin composition having excellent flame retardancy and excellent physical properties. The present invention relates to a flame retardant including: (A) 100 parts by mass of a reaction product of piperazine with one phosphorus compound selected from phosphoric acid, pyrophosphoric acid, and polyphosphoric acid; (B) 10 to 1000 parts by mass of a reaction product of melamine with a polyacid selected from cyanuric acid, phosphoric acid, pyrophosphoric acid, and polyphosphoric acid; and (C) 0.1 to 100 parts by mass of a reaction product of calcium or magnesium with silicic acid.

Disclosed are melamine and its preparing method and application, with the characteristics that add 10-300 portions of red phosphorus powder, 100-1000portions of water into reactor with agitator and thermometer, make them to be dispersion in 50-130deg.C, the add into 0-300portions of antiflaming synergistic agent, 50-100 portions of melamine and 50-200 portions of cyanuric acid (emulsion or cream of ), which are stirred for 5 minutes to 2 hours in 50-150deg.C, in the course, can add into 100-1000 portions of water, generate the emulsion or cream of cyanuric acid which are filtered, are centrifugal separated, dried and scattered to be 0.01-500um powder product. The product can be used as flame retardant of polymer or method with other flame retardant.

In a furnace having a primary combustion zone for combustion of a fuel and oxidant, an in-furnace method for reducing nitrogen oxides in combustion products generated in the primary combustion zone in which at least one fluid fuel selected from the group consisting of natural gas, hydrogen, CxHy compounds, CxHyOz compounds and mixtures thereof in an amount in a range of about 2.0% to about 25% of a total heat input to the furnace and at least one nitrogenous compound selected from the group consisting of ammonia, amines, urea, cyanuric acid and mixtures thereof are injected into the furnace downstream of the primary combustion zone, forming an overall fuel-lean NOx-reduction zone.

A flame-retardant polybutylene terephthalate resin composition wherein (A) 20-70% by weight of a polybutylene terephthalate resin or a mixture of a polybutylene terephthalate resin and a polyethylene terephthalate resin, (B) 1-20% by weight of a vinyl based resin, (C) 1-20% by weight of a phosphoric acid ester, (D) 1-30% by weight of a salt of a triazine based compound and cyanuric acid or isocyanuric acid, and (E) 0.1-5% by weight of an alkaline earth metal compound are compounded, and formed articles thereof have high degrees of flame retardancy and tracking resistance, and are unlikely to allow occurrence of metal pollution or deterioration in hydrolysis resistance due to a phosphoric acid ester, and therefore are suitable for machine component parts, electrical / electronic component parts, and automotive component parts.

Silicone resin composition for optical semiconductor devices, providing cured product wherein warpage in the devices is reduced and whiteness, heat-resistance, and light resistance are improved. The composition comprises: (A) an organopolysiloxane of the formula(CH3)aSi(OR1)b(OH)cO(4-a-b-c) / 2  (1)wherein R1 is monovalent hydrocarbon and a, b, and c are numbers such that: 0.8<=a<=1.5, 0<=b<=0.3, 0.001<=c<=0.5, and 0.801<=a+b+c<2; (B) white pigment; (C) an inorganic filler other than the white pigment; (D) condensation catalyst; (E) an epoxy resin derived from isocyanuric acid; (F) an organopolysiloxane comprising unit R2SiO and unit RSiO1.5, wherein R is hydroxyl, methyl, ethyl, propyl, cyclohexyl, phenyl, vinyl, or allyl; and(G) a linear diorganopolysiloxane of the formulawherein R5 and R6 are alkyl, cyclohexyl, vinyl, phenyl, or allyl and n is an integer from 800 to 1200.

A silicone rubber coating composition comprising (A) a diorganopolysiloxane containing an average of at least two alkenyl groups, (B) silica powder having a specific surface area of at least 50 m2 / g, (C) an organosilicon compound containing a ureido group, an isocyanuric acid ester modified with an organosilicon compound or a (partial) hydrolytic condensate thereof, and (D) a curing agent is applied and vulcanized to base fabric to form a coated fabric, from which airbags are prepared. The composition has a sufficient adhesion to withstand high temperature and abrupt elongation upon inflation of the airbag even after long-term storage under hot humid conditions.

The invention relates to B1-level spray coating polyurethane modified poly (isocyanuric acid ester) foam, which relates to a polyurethane material. The B1-level spray coating polyurethane modified poly (isocyanuric acid ester) foam is characterized in that: the compositions of the polyurethane rigid foam by weight proportion are 50 to 70 kilograms of polyester polyol PS-2412, 35 to 20 kilograms of polyether glycol 4110, 15 to 10 kilograms of polyether glycol 403, 6 to 7 kilograms of crosslinking agents, 1.5 to 2 kilograms of surfactants, 0.5 to 1 kilogram of water, 2 to 3 kilograms of composite amine catalysts, 1 to 2.5 kilograms of alkali metal salt catalysts (potassium acetate), 0.5 to 1 kilogram of PZA (six-hydrogen triazine), 23 to 24 kilograms of composite fire retardant (DMMP / TCPP) and 35 to 38 kilograms of foaming agents 141b; the compositions are uniformly mixed, and 210 to 212 kilograms of PAPI isocyanate solvent are taken by weight ratio; and the mixture and the isocyanate solvent are thrown into a spray gun through two pumps and mixed, and then spray coating is performed. The B1-level spray coating polyurethane modified poly (isocyanuric acid ester) foam has the advantages that: the polyester polyol PS-2412 is selected and a proper mixture ratio of DMMP and TCPP of the composite fire retardant is selected, thereby the fire retardant property of the polyurethane rigid foam reaches the B1 level.

Silicone resin composition for optical semiconductor devices, providing cured product wherein warpage in the devices is reduced and whiteness, heat-resistance, and light resistance are improved. The composition comprises: (A) an organopolysiloxane of the formula(CH3)aSi(OR1)b(OH)cO(4-a-b-c) / 2  (1)wherein R1 is monovalent hydrocarbon and a, b, and c are numbers such that: 0.8<=a<=1.5, 0<=b<=0.3, 0.001<=c<=0.5, and 0.801<=a+b+c<2; (B) white pigment; (C) an inorganic filler other than the white pigment; (D) condensation catalyst; (E) an epoxy resin derived from isocyanuric acid; (F) an organopolysiloxane comprising unit R2SiO and unit RSiO1.5, wherein R is hydroxyl, methyl, ethyl, propyl, cyclohexyl, phenyl, vinyl, or allyl; and(G) a linear diorganopolysiloxane of the formulawherein R5 and R6 are alkyl, cyclohexyl, vinyl, phenyl, or allyl and n is an integer from 800 to 1200.

The present invention relates to a molecular compounded trimeric cyanamide cyanurate fire-retarding agent, its preparation method and application. Its preparation includes the folloiwng steps: adding 10-300 portions of recombiner and 100-2000 portions of water in the reactor still with stirrer and thermometer, making them be completely dissolved at 50-130 deg.C, then successively adding 0-300 portions of fire-retarding synergist, 50-100 portions of trimeric cyanamide and 50-110 portions of cyanuric acid, stirring and reacting for 5 min-2 hr, at 50-150 deg.C, in the course of reaction can more adding 100-1000 portions of water so as to obtain the white emulsion or viscous paste-like material of molecular compounded trimeric cyanamide cyanurate.

The invention discloses a method for preparing melamine cyanurate with large particle size and wide distribution, and belongs to the technical field of preparation of flame retardants. The method comprises the following steps of: preparing raw materials, namely melamine and cyanuric acid in a molar ratio of 1:1.05, adding a solvent, namely water in an amount which is 3 to 6 times the total mass of the melamine and the cyanuric acid into a reaction kettle, adding the cyanuric acid into the reaction kettle, and heating to the temperature of between 60 and 110 DEG C with stirring; adding the melamine and a macromolecular nucleating agent, and reacting at the temperature of between 95 and 110 DEG C for 1.5 to 5 hours with stirring to obtain white slurry; and performing pressure filtering on the slurry, drying, and grinding to prepare white powdered melamine cyanurate with the particle size of 15 to 100mu m. The melamine cyanurate with large particle size and wide distribution is easily subjected to suction filtering and dried, so that production efficiency is improved; and the melamine cyanurate serving as a flame-retardant additive has high dispersibility in a macromolecular materialsubstrate, and the flame-retardant effect and mechanical property of the substrate material are improved.

The invention discloses a macromolecular dry denitrifying agent. The agent is prepared from components of raw materials in parts by weight as follows: 40-50 parts of urea, 10-20 parts of melamine and / or cyanuric acid, 20-30 parts of organic activated carbon powder, 10-15 parts of magnesium oxide, 10-15 parts of sodium carbonate, 20-25 parts of bentonite, 10-20 parts of quicklime and 1.0-1.2 partsof a catalyst. Meanwhile, the invention also provides a preparation method of the macromolecular dry denitrifying agent as well as a denitrifying technology and denitrifying equipment using the macromolecular dry denitrifying agent. The denitrifying agent obtained with the technical scheme is simple to prepare and low in cost. The dry denitrifying technology and denitrifying equipment using the denitrifying agent can treat flue gas with wider temperature ranges, have high denitrifying efficiency, have no ammonia escape and other side effects and have good application prospects.

The present invention relates to a melamine cyanurate (MCA) fire-resisting polyamide nano composite material and its preparation method. It is characterized by that it uses melamine (MEL) and cyanuric acid (CA) as raw material, uses polyamide as base body resin and uses water as dispersion medium, under the action of molecular recombiner and water-tying plasticizer, in the course of extrusion it can in-situ synthesize MCA and prepare fire-resisting polyamide nano composite material.

The invention discloses a preparation method of a composite material for inorganic modified melamine chlorinated isocyanurate flame-retardant nylon 6. The preparation method is characterized in that melted caprolactam is taken as a reaction medium; melamine and cyanuric acid react under the conditions of certain temperature and certain pH value; during the reaction process, water, an inorganic modified component and / or a precursor for generating the inorganic modified component, and other blending agents are added to prepare inorganic modified melamine chlorinated isocyanurate compound flame retardant; and then the composite material for the inorganic modified melamine chlorinated isocyanurate flame-retardant nylon 6 is prepared through in-situ polymerization under the conditions of certain temperature and certain pressure. During the whole preparation process, melted caprolactam not only serves as a resolvent for preparation of inorganic modified melamine chlorinated isocyanurate, but also serves as a polymerization monomer of the nylon 6; and synthesis and modification of modified melamine chlorinated isocyanurate and polymerization of the nylon 6 are accomplished at one step. The composite material for the flame-retardant nylon 6 has the characteristics of small additive amount of flame retardant, excellent overall performance of the composite material, and the like.

This invention relates to a crosslinking composition comprising a compound having the structure of Formula I:A′-NRA—RDwhere A′ is a moiety derived from the group consisting of linear or cyclic ureas, cyanuric acid, substituted cyanuric acids, linear or cyclic amides, glycolurils, hydantoins, linear or cyclic carbamates and mixtures thereof, or a moiety comprising the structure:where RA is RD, hydrogen, an alkyl of 1 to 20 carbon atoms, or taken together with A′ forms a cyclic compound; RD is —CHRC ORB, wherein RB is hydrogen, alkyl, aryl, aralkyl or an alkaryl having from 1 to about 24 carbon atoms and RC is an alkyl, halogenated alkyl, aryl, aralkyl, halogenated aralkyl, alkoxyalkyl or an alkaryl having from 1 to about 24 carbon atoms; A is a moiety derived from the group consisting of linear or cyclic ureas, cyanuric acid, substituted cyanuric acids, linear or cyclic amides, glycolurils, hydantoins, linear or cyclic carbamates and mixtures thereof; B is a residue of a poly(alkylaldehyde) with n aldehyde groups; n is an integer of 2 to about 8; Ra is Rd, hydrogen, an alkyl of 1 to about 20 carbon atoms, or taken together with A forms a cyclic compound; where Rd is CHRcORb orwhere Rb is hydrogen, alkyl, aryl, aralkyl or an alkaryl having from 1 to about 24 carbon atoms and Rc is an alkyl, halogenated alkyl, aryl, aralkyl, halogenated aralkyl, alkoxyalkyl or an alkaryl having from 1 to about 24 carbon atoms; and where the alkyl or aryl groups in each radical may optionally have heteroatoms in their structure. This invention also relates to a process for producing the crosslinking composition by reacting an amino compound containing amino groups; a mono(alkylaldehyde) and / or a poly(alkylaldehyde), and an alcohol; where said amino compound is selected from the group consisting of: linear or cyclic ureas, cyanuric acid, substituted cyanuric acids, linear or cyclic amides, glycolurils, hydantoins, linear or cyclic carbamates and mixtures thereof.

The invention discloses high-glowing filament anti-soaking separate-out-free halogen-free inflaming retarding polypropylene materials which comprise the following components: by weight, 40-80 parts of polypropylene (PP) resins, 20-40 parts of compound halogen-free flame retarding agents, 0.5-5 parts of flame retardant synergists, 0-30 parts of inorganic fillers, 0.1-0.5 part of antioxidants, and 0.4-1 part of lubricating agents. The compound halogen-free flame retarding agents are composed of the following components: by weight, 30-50 parts of silane-wrapped organic or inorganic hypophosphite, 35-50 parts of melamine formaldehyde resin (MF)-wrapped halogen-free organic phosphate ester or the ramification thereof, and 15-40 parts of melamine cyanuric acid ester. The compound halogen-free flame retarding agents are easy to disperse in the process of processing, so that processing is convenient. The halogen-free inflaming retarding polypropylene materials prepared by the method have high-glow filaments, and have the advantages of being anti-soaking, separate-out-free and the like. In addition, the production process is simple, so that industrial production can be achieved.

The invention provides burnthrough-resistant water-based fire retardant glue for spinning. The burnthrough-resistant water-based fire retardant glue is prepared from the following components in parts by weight: 100 parts of a water-based adhesive, 10 to 100 parts of a halogen flame retardant, 3 to 100 parts of a synergistic flame retardant, 0 to 30 parts of an auxiliary and 0 to 100 parts of water, wherein the water-based adhesive is prepared from ethylene-vinyl acetate copolymer emulsion and an auxiliary adhesive; the solid content of the ethylene-vinyl acetate copolymer emulsion is 20 to 56 percent; the weight ratio of the water-based adhesive to the halogen flame retardant is (1 to 8) to 1; the halogen flame retardant is prepared from one or more of decabromodiphenyl ether, decabromodiphenyl ethane, tri(2,3-dibromo propyl) isocyanuric acid ester, tri(tribromophenyl) cyanurate, ethylene bis (tetrabromophthalimide), tetrabromo bisphenol A, hexabromocyclododecane, octo-bromo-ether, chlorine ester resin, ploy (vinylidene chloride) resin, brominated styrene, brominated epoxy resin, polyvinyl chloride, chlorinated paraffin and methyl chloride.

The invention provides a halamine antibacterial agent and a synthetic method and application thereof. The halamine antibacterial agent is a compound with a structure which is shown as a formula (I) or a formula (II). The synthetic method comprises the following steps of: reacting by taking epoxy chloropropane and cyanuric acid or a derivative of the cyanuric acid as synthetic raw materials at the temperature of between 5 and 50 DEG C for 6 to 12 hours, filtering, removing impurities to obtain a halamine antibacterial agent precursor with a structure which is shown as a formula (III) or a formula (IV), and performing halogenating reaction to obtain a finished product of the halamine antibacterial agent. According to the application of the halamine antibacterial agent to the preparation of an antibacterial material, the antibacterial material is prepared by the following steps of: treating a material to be treated by a working solution prepared from the halamine antibacterial agent precursor, taking the material out, drying, treating at the temperature of between 80 and 200 DEG C for 3 to 60 minutes, and performing halogenating reaction. According to the method, reaction condition is mild, a process is simple, and raw materials are low in cost and readily available; and the halamine antibacterial agent synthesized by the method and the halamine antibacterial agent precursor are water-soluble, high in yield, safe and non-toxic, and can be prepared into antibacterial textiles with high antibacterial performance.

The invention discloses a light curing adhesive for splicing a capacitive touch screen. The light curing adhesive is prepared from the following components by weight percent: 30-50% of main body resin, 20-40% of auxiliary resin, 10-30% of an active monomer, 0.5-5% of a photoinitiator, and 0.1-5% of an auxiliary agent, wherein the main body resin is aliphatic urethane acrylate resin; the auxiliary resin is one substance or a mixture of more substances: cyanuric acid resin modified by acrylic ester, liquid nitrile rubber, liquid polybutadiene rubber and liquid isoprene rubber; the active monomer is one or a mixture of more of a vinyl ether monomer and an acrylate monomer; the photoinitiator is one or a mixture of two of a free radical initiator and a cationic photoinitiator; and the auxiliary agent is one or mixture of two of a silane coupling agent and a flatting agent. The light curing adhesive for splicing the capacitive touch screen has the advantages of high refractive index, high light transmittance, low color brightness, low hardness, low cure shrinkage rate, good reliability, good yellowing resistance and the like.

The invention belongs to the field of functional materials, and discloses a mesoporous graphite phase carbon nitride and a preparation method and application thereof. Ammonium salt is utilized as a pore-forming agent and a hydrothermal inducer and melamine is taken as a precursor, so that controllable mesoporous g-C3N4 is prepared. Ammonium salt is hydrolyzed in water, an acidic environment is provided, melamine is partially converted into cyanuric acid under the acidic condition, melamine and cyanuric acid are connected through hydrogen bonds between molecules to form supermolecules, the supermolecules are then roasted, cyanuric acid in the supermolecules is decomposed in the process of roasting to produce a great deal of gas (serving as a bubble template), meanwhile, voids are left over,so that rich pore structures are produced in the process of forming carbon nitride by the pyrocondensation polymerization of melamine, ammonium chloride which remains after hydrothermal treatment also plays the role of the bubble template, and ultimately, the mesoporous graphite phase carbon nitride with high catalytic performance is obtained.

Disclosed herein is a method of detecting a contaminant material in a food sample. The method includes irradiating a food sample with a beam of electromagnetic radiation, the beam having a plurality of frequencies in the range of about 100 GHz to about 2 THz; detecting radiation transmitted and / or reflected from the food sample; and, analyzing the detected radiation to determine the presence of contaminant material. The contaminant material may be melamine, cyanuric acid, ammeline, or ammelide.

The invention relates to a polyurethane modified hard isocyanuric acid ester foamed-plastic PIR energy-saving heat preserving plate which features a PIR sandwich plate structure or a PIR plate structure. In the PIR sandwich plate structure, a middle sandwich layer is a polyurethane modified hard isocyanuric acid ester foamed-plastic PIR macromolecular structure monomer; an upper surface and a lower surface of the middle sandwich layer are metal or non-metal sheets; the PIR plate structure refers to the attachment-free polyurethane modified hard isocyanuric acid ester foamed-plastic PIR macromolecular structure monomer formed according to box type foaming. The polyurethane modified hard isocyanuric acid ester foamed plastic is a novel macromolecular structure obtained by embedding a polyurethane molecular chain into polymer isocyanuric acid ester molecular chain. The invention has the advantage that compared with polyurethane heat preserving material, the energy-saving heat preserving plate of the invention has good fireproof performance and better heat preserving property.

The invention belongs to the field of battery materials, and particularly relates to a cathode material for a lithium battery. The invention discloses a method for preparing a lithium titanate / titanium nitride composite material, which comprises the following steps of: grinding titanium dioxide serving as a titanium source, lithium titanate and solid nitrogen source uniformly in a disperse medium, drying at the temperature of between room temperature and 120 DEG C, and grinding; and firing under the protection of vacuum or inert gas, and then naturally cooling to obtain the lithium titanate / titanium nitride composite material, wherein the nitrogen source is selected from one or mixture of more than two (comprising two) of urea, biuret, cyanamide, dicyandiamide, melamine, cyanuric acid monamide and cyanuric acid diamide. The method for directly preparing the Li4Ti5O12 / TiN composite electrode material by adding the solid nitrogen source into the raw materials for preparing Li4Ti5O12 does not increase the preparation process, has low cost, simple process and low energy consumption, and is easy to realize scale production.