1100 results about "Polymer resin" patented technology

A cable trough for installing cables alongside a railway line or other right of way is described. The cable trough is constructed using longitudinally oriented reinforcing fibers coated with polymeric resin that generally aligns the reinforcing fibers with the length of the cable trough. One or more connector clips may be used to secure respective portions of the cable trough to one another. The cable trough is provided with a cover that may be removably secured to an elongate channel to protect the cables housed within the cable trough. Elbows, corners, tees, and other connectors may be provided to run the cable trough in any desired direction. A method of installing cables in a cable trough is also described.

The invention discloses a high-thermal-conductivity carbon skeleton resin-based composite material and a preparation method thereof, and belongs to the technical field of thermal conductive composite materials. The preparation method comprises the following steps: firstly, preparing a fibrofelt preform from chopped mesophase pitch-based carbon fibers, and growing carbon nanotubes on the carbon fibers in situ by adopting a chemical vapor deposition process; depositing a layer of pyrolytic carbon through a chemical vapor infiltration process, and jointly connecting the carbon nanotubes / pyrolytic carbon with the chopped carbon fibers in the preform to prepare a porous hybrid network structure; carrying out graphitization treatment on the network structure to obtain a high-thermal-conductivity hybrid carbon skeleton composed of carbon fibers, carbon nanotubes and pyrolytic carbon; and impregnating polymer resin into the hybrid carbon skeleton structure through an impregnation process, and curing to obtain the carbon skeleton resin-based composite material. According to the prepared carbon skeleton resin-based composite material, when the volume fraction of the carbon skeleton accounts for 19.2 vol%, the thermal conductivity in the thickness direction of the composite material reaches 20.9 W / m.K which is 99 times of the thermal conductivity of pure epoxy resin, and the carbon skeleton resin-based composite material can be used as a novel thermal management material.

The invention relates to chitin-based acrylic resin and a preparation method thereof, and belongs to the technical field of intersection of high value-added utilization of biomass resources and acrylic resin. The chitin-based acrylic resin is prepared from the following components in parts by weight: 30 to 50 parts of acrylic modified chitin, 20 to 30 parts of acrylic monomer, 10 to 20 parts of polyaldehyde monomer, 5 to 10 parts of polybasic organic amine, 1 to 5 parts of emulsifier, 0.1 to 0.5 part of initiator, 0.2 to 0.4 part of defoaming agent and 80 to 120 parts of deionized water. According to the method, forestry and agricultural residues are used as raw materials, chitin with small molecular chains is obtained through deacetylation treatment of chitin, meanwhile, a large number of primary amino groups with high chemical reaction activity are exposed on the surfaces of the molecular chains of the chitin, and organic acrylic aldehyde is further utilized to react with the chitin; acrylic acid groups are successfully grafted to chitin molecular chains to be subjected to polymerization reaction with acrylic acid monomers to form macromolecule resin, meanwhile, the macromolecule resin is subjected to cross reaction with polyaldehyde and polybasic organic amine to generate net-shaped crosslinking, and the strength of the acrylic resin after film forming is improved.

The invention relates to the field of electromagnetic functional composite materials, and particularly discloses a multi-layer composite structure flexible frequency selective surface material and a preparation method thereof. The ultra-high molecular weight polymer fiber-reinforced polymer-based composite material thin-film mechanical enhanced band-pass frequency selection array sequentially comprises an acrylic acid polyvinylidene fluoride organic polymer coating environment-resistant layer, a metal oxide organic film isolation layer, an ultra-high molecular weight polymer fiber-reinforced polymer-based composite material thin-film mechanical enhanced layer, a band-pass frequency selection layer and a packaging protection layer from top to bottom, and the band-pass frequency selection layer is a hexagonal / circular ring nested band-pass frequency selection pattern array. The packaging protection layer is formed by printing a conductive coating composed of conductive filler / polymer resin matrix, and the packaging protection layer is an ink coating. The flexible frequency selective surface material has the characteristics of light weight, high strength, salt fog / rain / ultraviolet and other severe environments, frequency selective wave transmission and multiple functions, has good gas barrier property, is beneficial to maintaining the shape of an inflatable hangar made of a skin and ensuring normal operation of radar equipment, and has good practical engineering application value.

The invention provides coal-based porous carbon for preparing a silicon-carbon negative electrode material as well as a preparation method and application of the coal-based porous carbon, coal-based porous graphite is used as a matrix carbon material, polymer resin is used as a rigid bonding and coating material, heterogeneous elements such as B, N and P are used as doping materials, a carbon nanotube is used as a flexible conductive buffer material, and the materials are dispersed in a solvent to form slurry; through atomization granulation and high-temperature carbonization, heterogeneous element doped resin hard carbon is bridged with carbon nanotubes to construct a three-dimensional rigid-flexible conductive network to cooperatively coat the surface of the porous coal-based graphite, and doped heterogeneous elements are utilized to induce chemical-physical auxiliary activation to perform micro-mesoporous precise regulation and control pore forming on an inner core and a shell. The prepared novel coal-based porous carbon is high in porous framework particle strength and reasonable in pore distribution and has a three-dimensional rigid-flexible conductive network core-shell structure. The invention aims to solve the problems of unreasonable pore distribution of porous carbon, poor matrix strength and the like in the preparation process of a novel vapor deposition silicon-carbon negative electrode material.

The invention relates to the technical field of photoresist, in particular to a modification method suitable for photoresist. The photoresist is a positive photoresist and comprises phenolic polymer resin, a diazo naphthoquinone type photoinitiator, a solvent and an additive. According to the invention, a multi-carbon-based enol compound is used as a precursor to prepare a diazo naphthoquinone sulfonate type photosensitive compound, an aldehyde group carried in the diazo naphthoquinone sulfonate type photosensitive compound and an amine additive are used for grafting a photoinitiator-phenolic resin coupling product through a Schiff base reaction, and the dissolution inhibition effect of the photoinitiator-phenolic resin coupling product is adjusted; therefore, key characteristics such as resolution, etching resistance, edge roughness after exposure and development and the like of the photoresist are enhanced.

The invention provides a reflective thermal insulation coating based on three-dimensional porous resin as well as a preparation method and application of the reflective thermal insulation coating. The coating is prepared from the following raw materials in parts by weight: 15 to 60 parts of polymer resin emulsion, 1 to 15 parts of good solvent, 1 to 15 parts of poor solvent, 5 to 15 parts of reflective filler, 2 to 5 parts of nano kaolin and 1 to 5 parts of silicon dioxide aerogel. The reflective filler is hollow glass microspheres jointly modified by a silane coupling agent and titanium n-butoxide. The chemical reaction between the silane coupling agent and the surfaces of the glass microspheres can enhance the binding force between the silane coupling agent and the resin matrix, and avoids the problems of aggregation and sedimentation in the coating, thereby improving the uniformity and stability of the coating. Meanwhile, titanium n-butoxide is introduced, a TiO2 coating layer is generated through a hydrolysis reaction, heat can be effectively reflected through the high reflectivity of TiO2, heat absorption of the coating is reduced, and the heat insulation effect is improved. Therefore, the double-modified hollow glass microspheres can play a better heat insulation role in the coating, and the overall heat insulation efficiency of the coating is improved.

The invention provides a composite insulator with a cooling function and an embedded microcapsule hydrophobing agent and a preparation method of the composite insulator, and relates to the technical field of electric insulating materials. The composite insulator comprises an umbrella cover base material, the surface of the umbrella cover base material is provided with a cooling coating, and a microcapsule water repellent agent is embedded in the umbrella cover base material. The umbrella cover base material is silicone rubber or modified epoxy resin; the cooling coating is prepared from Al2O3 (at) TiO2 / PDA-BN, fluorocarbon resin, isopropanol, a dispersing agent and a flatting agent; the microcapsule water repellent agent is composed of a core layer and a shell layer, the core layer is made of fluorinated modified polystyrene / nano-silica microspheres, and the shell layer is made of polymer resin. The composite insulator has cooling and hydrophobic functions, the two functions are synergistic, the weather resistance of the insulator can be remarkably improved, the service life of the insulator in a severe environment is prolonged, and the defects that in the prior art, materials are fast in aging, poor in hydrophobic durability, single in function and the like are overcome.

A semiconductor encapsulation composition includes a polymer resin, a hardener, a filler, and an additive configured to adjust a reaction rate between the polymer resin and the hardener, wherein the polymer resin includes a high heat-dissipating resin having a mesogen unit, and the filler includes diamond powder or a mixture of the diamond powder and an inorganic filler.

The invention discloses a high-thermal-conductivity polymer shaped composite phase change material and a preparation method thereof. The high-thermal-conductivity polymer shaped composite phase change material comprises macromolecular resin, a processing aid, a thermal conductive filler, an organic phase change material, a modifier, an initiator, an emulsifier, a dispersant and a catalyst. According to the invention, expanded graphite is used as a heat-conducting reinforcing agent, high-density polyethylene is used as a carrier, paraffin is used as a phase-change material, a melt blending method, an in-situ polymerization method and a hot press molding process are adopted to prepare a microencapsulated HDPE shaped paraffin composite material, the HDPE shaped paraffin composite material is completely encapsulated in a polymer film, so that the core material is completely coated, and the heat-conducting property of the core material is improved. According to the present invention, the microcapsule is prepared by using a chemical bond, and is tightly combined with the surface of the core material through the chemical bond so as to improve the stability and the durability of the microcapsule, such that the microcapsule can prevent leakage and improve the thermal conductivity, such that the microcapsule can maintain the stable performance in the multiple phase change cycles, and the microcapsule has good fluidity and good dispersion so as to be conveniently processed and applied in various base materials.

The present disclosure provides micelles comprising a plurality of block co-polymers, the micelle comprising (i) a core comprising at least a portion of a poly(alkyl acrylate) block of one or more of the block co-polymers; and (ii) an outer layer comprising at least a portion of a poly(aryl acrylate) block or a poly(aryl methacrylate) block of one or more of the block co-polymers. The present disclosure also includes polymer compositions, polymer films, and devices (e.g., orthodontic equipment) including the same. Methods for making and using micelles, polymer compositions, polymer films, and devices (e.g., orthodontic equipment) are also disclosed. Further provided herein are methods of producing polymer compositions and using the same for the fabrication (e.g., via 3D printing) of medical devices, such as orthodontic appliances.

Thermoplastic compositions include: from about 35 wt% to about 70 wt% of a polymer resin, wherein the polymer resin comprises at least two polymer resins, wherein at least one of the polymer resins includes a high density polyethylene (HDPE) polymer having a degree of crystallinity of at least 47% as measured by differential scanning calorimetry (DSC); from about 10 wt% to about 40 wt% synthetic graphite; from about 5 wt% to about 15 wt% carbon nanotubes (CNTs); and from about 3 wt% to about 15 wt% conductive carbon black powder.

The invention discloses a preparation method of a waste fan blade crushed material modified high polymer material, which comprises the following steps: S1, crushing waste fan blades by a crusher, and grinding the crushed material into powder by a crusher, s2, weighing the waste fan blade crushed material, the surface modified resin, the polar resin and the stearic acid lubricant according to a formula ratio; s3, the weighed materials are sequentially put into an internal mixer, the internally mixed materials are added into a single-screw extruder for granulation, and filling modified master batches are obtained; and S4, mixing the filling modified master batch with polymer resin, and granulating by a twin-screw extruder to obtain the modified polymer material. The preparation method provided by the invention solves the problem that the crushed material of the waste fan blade is difficult to add in a plastic product, also improves the mechanical properties and processability of the material, and provides an efficient and environment-friendly solution for recycling and reusing the waste of the fan blade.

The invention provides a thermal slip temporary bonding adhesive and a preparation method and application thereof, and the thermal slip temporary bonding adhesive is prepared from the following raw materials in parts by weight: 50-70 parts of an organic solvent; 15 to 25 parts of basic resin; 10 to 21 parts of tackifying resin; 0.2 to 2 parts of an auxiliary agent; the basic resin comprises any one or a combination of at least two of a cycloolefin copolymer, a cycloolefin polymer and a cyclic block copolymer; the tackifying resin comprises low molecular weight polymer resin and other tackifying resin. The thermal slip temporary bonding adhesive provided by the invention has excellent chemical corrosion resistance and excellent bonding performance, is tightly combined with a wafer and a substrate, can well bond the wafer and the substrate together, and effectively prevents bonding pair defects; the temporary bonding adhesive is excellent in high temperature resistance, and can stably play a role without denaturation in the processing processes of wafer thinning and the like.

The invention discloses a polymer resin and a preparation method thereof, an optical lens and intelligent glasses, and relates to the technical field of resin materials. The polymer resin comprises a thioamide group, a thioether group and an aromatic group, and is prepared from the following raw materials: thiocyanate, a sulfhydryl compound, an organic base catalyst and a solvent. The oxidation resistance and the stability of the polymer resin can be improved, and the polymer resin also has high refractive index performance.

The invention discloses a nano organic titanium polymer and titanium-based polymer alloy copolymer as well as a preparation method and application thereof, and belongs to the technical field of material application. According to the invention, the defects in the prior art are overcome, titanium metal fine powder and organic epoxy resin or other polymer resin are blended, a nanocrystallization process is carried out in a planetary ball-milling reaction kettle, and complete chain and bond breaking, graft bonding and hybrid polymerization processes are carried out through a mechanochemical reaction, so that the titanium metal fine powder is obtained. According to the present invention, the nanometer organic titanium polymer and the titanium-based polymer alloy copolymer with the titanium element as the matrix are synthesized, the nanometer organic titanium polymer and the titanium-based polymer alloy copolymer are adopted as the matrix film forming material to be applied to the coating material, and the coating material can be widely used in the industrial heavy corrosion prevention field.

The present invention relates to a radiative cooling paint consisting of ceramic fine particles as pigments, a polymer resin as a binder, and a solvent. According to the present invention, a substrate is coated with the radiative cooling paint, and then a paint film layer is formed. The paint film layer performs a radiative cooling function by preventing energy inflow from incident sunlight by maximizing reflection of incident sunlight; minimizing absorption of incident sunlight; and maximizing emission of long-wavelength infrared light corresponding to 8 μm to 13 μm and increasing energy discharge through emission of long-wavelength infrared light, and pores with a volume of 3% to 50% are formed inside the paint film layer to enhance reflection of incident sunlight without reducing emission of long-wavelength infrared light.

The invention discloses a flexible anti-fouling and anti-drag composite coating with temperature responsiveness and a preparation method and application of the flexible anti-fouling and anti-drag composite coating. The flexible antifouling anti-drag composite coating comprises a substrate layer, a flexible buffer layer, an antifouling response layer and a hydrophobic surface layer which are sequentially formed on the surface of a base material, wherein the substrate layer comprises adhesive resin, a positively charged polymer and a particle filler; the flexible buffer layer comprises flexible polymer resin, a negatively charged polymer, a polymer drag reducer and an anti-ultraviolet additive; the hydrophobic surface layer comprises flexible polymer resin, a temperature-responsive polymer microcapsule encapsulated with an antifouling agent, a pore-foaming agent, an anti-ultraviolet additive and super-hydrophobic micro-nano particles. The flexible anti-fouling and anti-drag composite coating with temperature responsiveness provided by the invention has strong binding force with a base material, and also has anti-fouling property, corrosion protection property and anti-drag property; meanwhile, the preparation method provided by the invention has the advantages of wide application range, large-area coating and the like.

The invention provides conductive copper-based slurry for a laminated solid aluminum capacitor core and a preparation method and application of the conductive copper-based slurry, and relates to the technical field of solid aluminum capacitors. The conductive copper-based slurry for the laminated solid aluminum capacitor core comprises the following components in parts by weight: 40-60 parts of conductive filler, 5-15 parts of polymer resin and 30-50 parts of solvent, the conductive filler is antioxidant copper powder and / or silver coated copper powder. The conductive copper-based slurry is a high-solid-content and low-viscosity system, the dip-coating process is adapted by regulating and controlling the ratio of the conductive filler to the organic carrier, and high conductivity under low-temperature air curing is achieved; by reasonably adding the anti-settling agent, the dispersing agent, the solvent and other organic carriers, it is ensured that the slurry meets the requirements for viscosity and suspension property of the dipping process, slurry settling is effectively prevented, the film thickness uniformity after dipping, pulling and curing and the equivalent series resistance stability of a finally obtained capacitor core are ensured, and the performance stability and reliability of a capacitor are improved.

Disclosed are a corrosion-resistant film for a magnesium alloy wheel and a preparation method thereof, The corrosion-resistant film for a magnesium alloy wheel includes: a micro-arc oxidation (MAO) coating, a chemically blocked coating, a physical vapor deposition (PVD) high-density inorganic hybrid coating, a high oxidation-resistant powder coating which are sequentially stacked from inside to outside by using the magnesium alloy wheel as a substrate. In the present disclosure, based on a micro-arc oxidation technology, zirconium, titanium, an iron salt, nano silicon, polymer resin are added into an electrolytic solution, and under a constant voltage mode of an adjustable power supply, the MAO coating is generated on the surface of the magnesium alloy wheel, followed by chemical blocking; the PVD high-density inorganic hybrid coating is obtained by coating on the chemically blocked coating, physical blocking is performed; the high oxidation-resistant powder coating is spray-coated on the PVD high-density inorganic hybrid coating.

The invention provides a single-component modified silane adhesive as well as a preparation method and application thereof. The adhesive is prepared by mixing the following components: silane modified polyether resin, silane modified polymer resin, a plasticizer, a composite light stabilizer, a filler, a rheological additive, a water removal agent, a coupling agent and a catalyst, the silane modified polyether resin is silane-terminated resin prepared by a hydrosilylation method; the silane-modified polymer resin is a silane-terminated polymer resin containing a urethane bond. The adhesive is excellent in comprehensive performance, the tensile strength of a body is larger than 3 MPa, the elongation at break is larger than 450%, the adhesive is high in adhesion universality to metal base materials, PET films, ceramics, glass, wood floors, PVC, PC, ABS, wood-plastic composite materials and paint faces, the base materials do not need to be specially treated, the damage form is cohesive failure, and the adhesive has good adhesion strength, tear resistance and excellent temperature resistance and is suitable for being applied to the field of wood products. After aging at 120 DEG C for one week, the tensile strength of the body is greater than 3 MPa, the elongation at break is greater than 430%, and the surface layer can be coated after curing.

The preparation method comprises the following steps: firstly, adding flaky, fibrous and granular solid flame-retardant fillers with large particle size difference into water-based resin diluted by clear water, uniformly mixing and stirring, and then spraying or brushing on the surface of a base material, therefore, a coating with sponge-like porous and capillary channel intercommunication structures inside and on the surface is formed on the surface of the base material. Secondly, siloxane is dissolved in a solvent and evenly brushed or sprayed on the surface of the coating, and the siloxane permeates into the coating through the holes and the capillary channels; thirdly, dispersing macromolecular resin and inorganic nanoparticles in a solvent, stirring to form a uniform dispersion liquid, and then infiltrating the macromolecular resin and the inorganic nanoparticles into the pores and capillary channels wrapped and modified by siloxane in a spraying or brushing manner, and drying at room temperature to obtain the flame-retardant, super-hydrophobic, anti-seepage and anti-fouling multifunctional coating material.

The invention discloses a novel automobile back view mirror flexible printed circuit board prepared based on weldable silver paste, and belongs to the technical field of electronic materials and devices, conductor patterns in the flexible printed circuit board comprise a main circuit pattern and an auxiliary function structure formed by weldable low-temperature curing silver paste; the curing temperature of the weldable low-temperature silver paste is 125-135 DEG C, and the weldable low-temperature silver paste comprises conductive filler, a polymer resin system, a high-boiling-point ester solvent, a curing agent, a silane coupling agent, a polyamide wax thixotropic agent, a polysiloxane defoaming agent, modified carbon nanotubes, modified aluminum oxide powder, modified barium sulfate and a low-stress modifier. The polymer resin system comprises novolac epoxy resin, biphenyl epoxy resin and a polyacrylate-CTBN copolymer; through the synergistic effect of all the components and an innovative process, comprehensive improvement of mechanical reliability, environmental durability, conductive stability and power load capacity is achieved, and the strict requirement for high reliability of the automobile rearview mirror in an extreme environment is perfectly met.

The invention discloses a novel notebook flexible printed circuit board prepared based on weldable low-temperature silver paste and a backlight module, and belongs to the technical field of electronic materials and devices. Conductor patterns of the flexible printed circuit board comprise a main circuit pattern formed by rolled copper; the auxiliary function structure is formed in a local area of the main circuit pattern by weldable low-temperature silver paste; the curing temperature of the weldable low-temperature silver paste is 130-145 DEG C, the weldable low-temperature silver paste comprises conductive filler, a polymer resin system, an ester solvent, a curing agent, a silane coupling agent, a polyamide wax thixotropic agent, a polysiloxane defoaming agent, modified carbon nanotubes and modified antimony tin oxide powder, and the conductive filler comprises flaky silver powder, spherical silver powder and low-temperature alloy powder. The low-temperature alloy powder is Sn42Bi58 low-temperature alloy powder of which D50 is 12 [mu] m-15 [mu] m; according to the invention, low-temperature curing, high flexibility, excellent conductivity and direct weldability are integrated, and a solution suitable for local repair of a flexible printed circuit board and direct mounting of a jumper and a Mini LED chip is provided.

The invention discloses a special plastic composite material for a new energy battery case and a preparation method, and belongs to the technical field of high polymer materials. Graphene oxide with a large specific surface area is used as a carrier, magnesium hydroxide is loaded by a precipitation method, montmorillonite is organically modified by using cetyltrimethylammonium bromide, an intercalation structure of the graphene oxide and the montmorillonite is utilized, and the composite material is prepared. A graphene oxide material loaded with magnesium hydroxide and organic modified montmorillonite are mixed and react to form a modified filler, and the modified filler is added into a macromolecular resin material, so that uniform dispersion of an inorganic material in an organic polymer is realized, and a synergistic effect of the magnesium hydroxide, the graphene oxide and the montmorillonite is utilized to realize uniform dispersion of the inorganic material in the organic polymer. The flame retardant property of the special plastic composite material for the new energy battery shell is improved, the special plastic composite material has excellent impact resistance and heat-conducting property, and the safety of practical application is enhanced.

A formulation and method for producing a multilayer film and a coated multilayer film comprising a barrier layer including a polar polymer resin, such as EVOH, as described.

The purpose of the present invention is to provide a cyclic olefin polymer resin foam sheet which maintains the stability of mechanical properties or thermal properties and achieves excellent light reflection properties and dielectric properties (low relative permittivity and low dielectric loss factor) and surface quality. The present invention obtains a cyclic olefin polymer resin foam sheet which comprises either a monomer of a cyclic olefin homopolymer (A) or a monomer of a cyclic olefin copolymer (B), or a mixture of the cyclic olefin homopolymer (A) and the cyclic olefin copolymer (B), and which has an average bubble diameter of 1-20 [mu] m. As a result, it is possible to obtain a cyclic olefin polymer resin foam sheet having excellent light reflection properties, dielectric properties (low relative dielectric constant, low dielectric loss factor) and surface quality.

The invention belongs to the technical field of cable production, and particularly relates to a corrosion-resistant high-toughness power cable and a preparation method of the corrosion-resistant high-toughness power cable. Glass fibers; ethylene propylene diene monomer; modifying the basic magnesium sulfate whisker; ultrafine diatomite; zirconium dioxide; white carbon black; an inorganic filler; through the synergistic effect of all the raw material components, the high-temperature-resistant plastic has good strength, mechanical toughness, corrosion resistance, aging resistance and high high-temperature resistance, and is green and environment-friendly; the modified magnesium sulfate whisker and the basic magnesium sulfate whisker have excellent toughening and reinforcing effects on a polymer resin matrix and have a good flame-retardant effect; the polypropylene and the ethylene propylene diene monomer are blended, melted and extruded, the ethylene propylene diene monomer can improve the defect of low-temperature brittleness of the polypropylene, and meanwhile, the mechanical impact of the polypropylene can be enhanced; the zirconium dioxide is adopted, and the zirconium dioxide has excellent high-temperature chemical property stability, corrosion resistance and oxidation resistance, so that the corrosion resistance and the high-temperature resistance of the material can be enhanced.

Disclosed is a composition comprising from about 60 wt. % to about 99.85 wt. % of a polar polymer resin, from about 0.05 wt. % to about 20 wt. % of graphene; and from about 0.001 wt. % to about 8 wt. % of a base additive, wherein the graphene and base additive are combined in the composition to provide a modified graphene, wherein a molded sample of the composition exhibits a greater multi-axial impact strength than a reference composition in the absence of the base additive when tested in accordance with ISO 6603, wherein the combined weight percent value of all components does not exceed 100 wt. %, and all weight percent values are based on the total weight of the composition.

The invention discloses preparation of an N and P flame retardant and application of the N and P flame retardant in a flame-retardant polymer. The N and P series flame retardant is a copolymer containing a DOPO group and an anhydride group, and the molecular structure of the N and P series flame retardant comprises at least one of a structural unit I and / or a structural unit II, a structural unit III and a structural unit IV, or at least one of structural units V-VI. The molecular structure of the N, P-series flame retardant contains DOPO groups, and the N, P-series flame retardant shows excellent flame retardance after being blended with polymer resin. Moreover, the molecular structure of the flame retardant contains anhydride groups, so that the flame retardant molecules and a polymer resin matrix have better compatibility, and the original mechanical properties of the polymer resin are retained to a great extent. Meanwhile, the anhydride group is used as an acid source, so that the effect of promoting char formation can be achieved. Due to the existence of the anhydride group, the problems of insufficient flame retardant efficiency, poor compatibility with a polymer resin matrix and the like when the DOPO flame retardant is independently used are solved.