375 results about "Thixotropy" patented technology

The invention belongs to the technical field of oil field well cementation cement paste, and particularly relates to thixotropic cement paste and a preparation method thereof. The thixotropic cement paste provided by the invention comprises water, a dry powder material, modified silica sol, a polymer fluid loss agent and other additives. The cement paste disclosed by the invention has the characteristics of viscoelasticity, no dispersion under water, thixotropy and leaking stoppage.

The invention provides a method for coating slurry on the surface of a sintered neodymium-iron-boron matrix, a preparation method of a sintered neodymium-iron-boron magnet and the slurry. The method for coating the surface of the sintered neodymium-iron-boron substrate with the slurry comprises the steps that the slurry is prepared; wherein the slurry comprises powder containing heavy rare earth elements, an organic solvent and a binder, and the viscosity of the slurry is 2000-5000 mPa.s; and coating the surface of the sintered neodymium-iron-boron substrate with the slurry by adopting a roller coater to form a coating layer. The slurry provided by the invention is low in viscosity, good in flowability, low in thixotropy, low in shear viscosity mutation rate and low in temperature sensitivity, the weight gain uniformity of magnets in each batch and between batches is good, and the coercive force is obviously improved.

A method for characterizing thixotropic characteristics of submarine landslide mass material, including: performing steady shear on landslide mass material, and determining solid-fluid transition boundary according to variation of yield stress value in yield stress test; performing conversions between shear speed and shear rate and between shear torque and shear stress according to variations of apparent viscosity-shear speed and shear torque-shear speed of landslide mass material at different shear times in apparent viscosity test to obtain variations of the apparent viscosity and the shear stress at different shear rates to construct conventional rheological model; constructing thixotropy characterization equation according to variations of the shear stress and the apparent viscosity with the shear time in the thixotropy test; and constructing rheological model for characterizing the thixotropic characteristics of the submarine landslide mass material according to the solid-fluid transition boundary, the conventional rheological model, and the thixotropy characterization equation.

The invention discloses a concrete viscosity modified material and a preparation method thereof, and belongs to the technical field of building materials. The concrete viscosity modifying material comprises the following components in percentage by mass: 65%-85% of a mineral admixture, 15%-35% of a modified tackifier, 1%-5% of an inorganic thixotropic agent and 1%-5% of an organic thixotropic agent, wherein the modified tackifier is obtained by taking rice hull ash obtained by calcining rice hulls, pretreated biogel and a silane coupling agent as raw materials, and performing dispersion, standing and spray drying. The modified tackifier is prepared from the rice hull ash, the biological glue and the silane coupling agent, then the mineral admixture, the inorganic thixotropic agent and the organic thixotropic agent which have high-quality thixotropic performance are compounded, the finally prepared concrete viscosity modified material has excellent thixotropy, the working performance of concrete can be improved, and meanwhile, the concrete viscosity is improved. The problems of bleeding, segregation and the like of mortar and concrete are effectively solved, and the application value is high.

The invention discloses a method and a device for predicting and adjusting vertical conveying pressure of an emulsion matrix, which realize gradient release of kinetic energy of fluid and suppression of impact pressure through dynamic pipeline structure design and collaborative optimization of conveying parameters, combined design of a snakelike pipeline and a sectional horizontal extension section, and cooperation with a tail end U-shaped buffer structure. A multistage speed control device and a variable damping assembly are constructed, and a flow velocity fine regulation and working condition self-adaptive matching mechanism is formed in combination with a pressure prediction model based on machine learning. A fluid-solid-heat multi-physics field coupling analysis technology is introduced, a non-Newtonian fluid constitutive model is optimized, and a pressure distribution rule under a complex working condition is accurately predicted. Through rheological property research and formula improvement, an emulsion matrix system with high thixotropy and suitable yield stress is developed, and the system adaptability is improved from the two dimensions of fluid intrinsic characteristics and a conveying process. According to the technical system, the pressure fluctuation amplitude of the pipeline is remarkably reduced while the conveying efficiency is guaranteed.

The invention relates to the field of building structure adhesives, and discloses a low-temperature double-component epoxy adhesive system for a wind power mixing tower and a preparation method of the low-temperature double-component epoxy adhesive system. The system comprises an epoxy resin component (A) and a curing agent component (B) in a weight ratio of (1.5-2.2): 1, wherein the epoxy resin component (A) contains 80-150 parts by weight of epoxy resin (a1), 5-15 parts by weight of a diluent (a2), 3-8 parts by weight of a thixotropic agent (a3) and 150-300 parts by weight of a filler I (a4); wherein the curing agent component (B) contains 50-200 parts by weight of a curing agent (b1) and 100-300 parts by weight of a filler II (b2). The adhesive system is used for vertical and horizontal bonding construction of wind power concrete tower tube segments in the environment of-15 DEG C to 5 DEG C, and is convenient to apply, high in sagging resistance, good in thixotropy, high in curing speed and high in compression strength after curing.

The invention belongs to the technical field of building materials, and particularly relates to a bentonite-starch composite thixotropic agent as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) grafting a carbon-carbon double bond on starch to obtain grafted modified starch; (2) grafting ether groups on carbon-carbon double bonds of starch to obtain modified etherified starch; (3) adsorbing a polycarboxylate superplasticizer and polyethylene glycol on the surface and between layers of bentonite to obtain modified bentonite; and (4) adding the modified etherified starch, the modified bentonite, a cross-linking agent, an initiator and a pH regulator into water, and carrying out graft copolymerization reaction to obtain the bentonite-starch composite thixotropic agent. The composite thixotropic agent has excellent thixotropic performance, stability, plasticity and cohesiveness, and overcomes the defects that bentonite has water absorption expansibility and is difficult to store, and an organic thixotropic agent is high in price and poor in stability.

The invention provides a thixotropy quantitative characterization method of lithium slag-tailings cemented filling slurry, and relates to the technical field of metal ore remaining tailings and lithium slag treatment. Comprising the following steps: preparing to-be-tested slurry and setting test parameters; starting a rheometer to test the to-be-tested slurry to obtain multi-stage thixotropic data of the to-be-tested slurry; according to the multi-stage thixotropic data, constructing a curve of the apparent viscosity changing along with the test time; carrying out data fitting on the curve by adopting a thixotropic quantitative characterization method so as to obtain specific fitting parameters and a flocculation rate; calculating the thixotropy of the slurry by using a structural recovery rate formula; and analyzing and characterizing the thixotropy of the slurry by using the obtained structure recovery rate and flocculation rate to obtain a characterization result. The problem that in the prior art, the thixotropy experiment result is low in accuracy is solved.

The invention discloses a low-density high-strength wind power epoxy structural adhesive which is composed of a component A and a component B according to the mass ratio of 10: (4-6), wherein the component A comprises the following raw materials in parts by weight: 60-80 parts of epoxy resin, 3-7 parts of a diluent, 0.5-2 parts of a coupling agent, 5-6 parts of a flexibilizer, 0.1-2 parts of an auxiliary agent, 4-6 parts of a thixotropic agent, 1-15 parts of a novel functional filler and 2-10 parts of a second functional filler; and the component B comprises the following raw materials in parts by weight: 75-85 parts of an amine curing agent, 0.1-2 parts of an auxiliary agent, 5-10 parts of a thixotropic agent, 1-15 parts of a novel functional filler and 1-10 parts of a second functional filler. The low-density and high-strength wind power epoxy structural adhesive has the advantages of low specific gravity, high thixotropy, high strength, good body mechanical property and bonding property, excellent acid and alkali resistance and fatigue resistance, the density is greatly reduced by introducing the novel functional filler, the use amount of the wind power epoxy structural adhesive can be saved, the cost is reduced in a synergistic manner, and the cost is reduced. And the development of the blade industry is promoted.

The invention discloses modified calcium carbonate powder applied to silicone adhesive and a preparation method of the modified calcium carbonate powder, and relates to the technical field of calcium carbonate powder modification, the modified calcium carbonate powder comprises heavy calcium carbonate powder and an additive for modifying the heavy calcium carbonate powder; the additives comprise N, N '-ethylene bis stearamide, glycerol, an aluminate coupling agent, a castor oil derivative, a dispersing agent and a rheological agent; the calcium carbonate filler has the characteristics of high whiteness, low cost, strong lipophilicity, small stacking density, low oil absorption value and the like, and the silicone adhesive produced by using the calcium carbonate filler has the advantages of good fluidity, good thixotropy, good extrudability of the finished product adhesive and outstanding mechanical properties, and is a high-quality calcium carbonate filling filler for producing the silicone adhesive.

The invention belongs to the technical field of silica gel, and relates to alkoxy silane-terminated polysiloxane and a preparation method thereof, and the alkoxy silane-terminated polysiloxane comprises the following components in parts by weight: (A) 80-100 parts of polysiloxane containing at least one vinyl group in a molecule; (B) 2 to 20 parts of composite hydrogen-containing alkoxy silane; (C) 0.01 to 1 part of catalyst; and (D) 0.1 to 4.5 parts of activated carbon. The alkoxy silane-terminated polysiloxane can be suitable for various formula systems such as moisture curing, addition curing and UV / moisture dual curing of organic silicon products, is particularly suitable for being applied to formula systems which contain powder and have certain thixotropy, and regulates and controls the thixotropic property and the flowing property of the products while keeping certain viscosity.

The invention discloses an admixture for building formwork concrete, and belongs to the technical field of concrete materials. The admixture for the building formwork concrete, disclosed by the invention, comprises the following components in parts by weight: 65-70 parts of chitosan modified metakaolin; 10 to 15 parts of microencapsulated latex powder; 5 to 10 parts of calcium sulphoaluminate clinker; and 3-5 parts of modified polypropylene chopped fiber. Through reasonable proportioning of the components, the synergistic effect of the different components is brought into full play, and the invention aims to provide the additive for the building formwork concrete, which can significantly improve the thixotropic property, the interface bonding force and the crack resistance of the building formwork concrete and effectively prevent the corrosion of a steel formwork at the same time. The method is suitable for building formwork concrete engineering of a complex grid structure and has remarkable application value.

The invention provides 3D printing silicone rubber ink containing high-dispersion and high-reinforcement white carbon black as well as a preparation method and application of the 3D printing silicone rubber ink. The 3D printing silicone rubber ink provided by the invention comprises the high-dispersion high-reinforcement white carbon black and the low-thickening white carbon black, and the combined use of the high-dispersion high-reinforcement white carbon black and the low-thickening white carbon black can enable the 3D printing silicone rubber ink to have thixotropy and self-supporting capability at the same time, and have the characteristic of being compatible with high-function filler; by applying the 3D printing silicone rubber ink, 3D printing silicone rubber with excellent mechanical properties can be obtained. The preparation method of the 3D printing silicone rubber ink is simple, the preparation cost is low, the mechanical property of the obtained 3D printing silicone rubber is excellent, mass production preparation of the 3D printing silicone rubber is facilitated, and the application requirements in the fields of thermal management elastomers, damping elastomers and the like are met.

The invention provides low-thixotropy and high-fluidity spherical silicon dioxide as well as a preparation method and application thereof, and belongs to the technical field of silicon dioxide. The spherical silicon dioxide with low thixotropy and high fluidity is obtained by carrying out grain size distribution on spherical silicon dioxide with different grain sizes and carrying out wet modification treatment by adopting a coupling agent. Results of the embodiment show that when the low-thixotropy and high-fluidity spherical silicon dioxide provided by the invention is added into epoxy resin, the thixotropy of the obtained composition is less than 3, and the flow diameter is more than 1.5 cm.

The invention relates to the related technical field of cables, and discloses an anti-aging wear-resistant cable and a preparation technology thereof.The cable core and a skin layer wrapping the cable core are characterized in that the skin layer comprises a wear-resistant surface layer, a phase change layer and a supporting layer from outside to inside, and the cable core is wrapped by the supporting layer; the phase change layer comprises closed cavities defined by elastic partition walls, the adjacent cavities are communicated through controllable valve channels, the cavities are filled with thixotropic phase change bodies, the thixotropic phase change bodies are in a gel state in a static state and are converted into a sol state when being pressed, an elastic supporting net is arranged in the supporting layer, the cable core is wrapped by the elastic supporting net, and the cable core is arranged in the supporting layer. The cable has the self-circulation heat dissipation function, liquid in the flexible pipeline actively flows into the grooves of the wear-resistant surface layer through the heat conduction channels and the small holes, the liquid is dispersed on the outer side, the heat dissipation efficiency is improved, the heat dissipation area is increased, and the heat dissipation efficiency is improved.

Provided is a fibrillated chemically modified cellulose fiber, which has a type-I cellulose crystallinity of at least 50%, an anionic charge density of 0.10-2.00 meq / g, and an average fiber diameter of greater than 500 nm. Also, provided is a fibrillated chemically modified cellulose fiber, wherein the value (A / B) obtained by dividing the viscosity A measured at a shear rate of 0.01 / sec by the viscosity B measured at a shear rate of 1000 / sec in an aqueous dispersion having a solid content of 1 mass % is at least 100. These fibers have high water retention and high thixotropy.

The invention relates to a fractured rock thixotropic fluid seepage diffusion path characterization method, and belongs to the technical field of geotechnical engineering. The method comprises the following steps: constructing a fractured rock mass network geometric model based on geological exploration data; constructing a fluid seepage constitutive equation according to the thixotropic fluid characteristic parameters; grid division is carried out based on the constructed fractured rock mass network model, a one-dimensional fluid seepage channel is assembled, and dimension reduction solving of a complex problem is achieved; fluid pressure and fluid seepage velocity parameters are obtained through iterative solution, and a fluid characteristic parameter change rule is updated in real time; and generating and outputting a fluid seepage diffusion behavior tracking result under a set working condition based on the simulation state quantity. Compared with the prior art, the method has the advantages that the complex fluid diffusion rule caused by the thixotropic fluid viscosity time-varying characteristic can be accurately described, the method is suitable for accurate characterization of the grouting diffusion path in geological engineering, and a scientific basis is provided for optimizing construction parameters.

The invention discloses a nano-modified fiber reinforced 3D printing magnesium phosphate cement-based material as well as a preparation method and application thereof. The material is prepared from the following components in parts by weight: 40 to 70 parts of dead burned magnesium oxide, 10 to 25 parts of basic hydrogen phosphate, 5 to 25 parts of silica fume, 30 to 60 parts of fine aggregate, 10 to 30 parts of water, 0.1 to 1 part of fiber dispersing agent and 0.5 to 5 parts of nano modified fiber, the surface activity of the fiber is remarkably improved through a nano modification process, active SiO2 sites attached to the surface of the fiber are activated by using an alkali solution, and a hydration product is generated in situ, so that the interface bonding strength between the fiber and a cement matrix is enhanced, and the surface strength of the fiber is improved by relying on the high-rigidity characteristic of the fiber. The yield stress, thixotropic property and constructability of the material are effectively improved, structural deformation in the printing process is remarkably inhibited, and the 3D printing material has excellent rheological property, strengthened mechanical property and tough fiber-matrix interface bonding property.

The invention relates to the technical field of silicone rubber sealing materials, and discloses a fast-curing matte silicone sealant and a preparation method thereof.The silicone sealant is prepared from, by mass, 100 parts of alpha, omega-dihydroxy polydimethylsiloxane, 5-15 parts of a reactive plasticizer, 70-120 parts of calcium carbonate, 5-10 parts of a cross-linking agent, 1-5 parts of a coupling agent, 0.5 part of a catalyst and 0.5-1 part of a vulcanization accelerator; 0.2 to 1.5 parts of a reaction type matte agent solution; the reaction type matte agent solution is a mixture of hydroxylated eleostearic acid triglyceride and a cross-linking agent. The silicone sealant prepared by the invention has the advantages of smooth surface, excellent matte effect, weather aging resistance, thixotropy, rapid curing and the like, can be used as a sealing material for high-end buildings, and has a wide application prospect.

The invention provides a high-rheology lasting type coating and a preparation method of the high-rheology lasting type coating. The coating is prepared from the following raw materials: 6 to 12 parts of fluorosilicone grafted hyperbranched polyurethane core-shell functional microspheres, 2 to 5 parts of graphene-nano silicon dioxide composite rheological regulator, 25 to 35 parts of epoxy acrylate resin, 15 to 25 parts of polysiloxane modified waterborne polyurethane acrylate emulsion, 8 to 15 parts of filler, 0.8 to 1.6 parts of rheological agent, 1.8 to 7.1 parts of functional additive, 10 to 18 parts of solvent and 0.1 to 0.3 part of preservative. The obtained coating has high thixotropy, excellent long-acting durability and multiple protection effects of fire prevention, water prevention, pollution resistance and the like, and meanwhile, the fidelity of a coating mold pressing structure and the construction applicability can be guaranteed.

The invention relates to the technical field of oral care and anhydrous toothpaste, in particular to bioactive glass-containing anhydrous toothpaste based on rheological property regulation and control and a preparation method and application thereof.The anhydrous toothpaste adopts glycerin and polyethylene glycol as a humectant compound system to construct an anhydrous system, and the situation that active ingredients of bioactive glass lose efficacy when meeting water is avoided; and the chemical activity and the structural stability can be kept during long-term storage. A thickening agent compound system composed of carbomer, quaternary ammonium salt-22 and hydroxypropyl gelatin is cooperatively adopted, so that a rigid-soft, compact and firm spatial network structure can be formed, an abrasive and bioactive glass particles can be stably suspended for a long time, the high activity of bioactive glass is kept, and the bioactivity of the bioactive glass is improved. And in the aspect of rheological properties, the composite material shows excellent thixotropy, relatively high structure recovery rate and appropriate yield stress, and has a remarkable remineralization repair effect and an excellent sensory effect. And the preparation process is simple, low in cost and suitable for large-scale industrial production.

The invention discloses curable slurry of an epoxy resin-polyvinyl butyral composite material and a preparation method of the curable slurry. The curable slurry comprises a component A and a component B, the component A comprises the following raw materials by mass: 100 parts of epoxy resin; 0-30 parts of an epoxy reactive diluent; the component B is prepared from the following raw materials in parts by mass: 10 to 50 parts of micromolecular amine curing agent; 0-40 parts of a polymer amine curing agent; 1 to 10 parts of polyvinyl butyral; and 0 to 10 parts of an amino silane coupling agent. No extra solvent needs to be added, safety and environment friendliness are achieved, and the defects that the epoxy resin is large in brittleness, prone to cracking, prone to sagging in facade construction and the like in a low-temperature environment are overcome by means of the good flexibility, tensile strength and other mechanical properties of the polyvinyl butyral and the good compatibility with the epoxy resin, and the thixotropy of the epoxy resin is improved. The method has wide applicability to various existing epoxy resins and amine curing agents, and has a wide application prospect.

The invention relates to the technical field of oil and gas well development, in particular to a temperature-resistant thixotropic agent and a preparation method and application thereof. The preparation method comprises the following steps: carrying out graft modification on diquat glue by adopting acrylic acid and N-vinyl pyrrolidone to obtain modified diquat glue; and compounding the modified diquat and aluminum-magnesium silicate to prepare the temperature-resistant thixotropic agent. The temperature-resistant thixotropic agent prepared by the invention can remarkably improve the thixotropic property of magnesium oxychloride cement in a high-temperature environment of an oil and gas well, effectively improve the rheological property of cement paste, enhance the retention capacity of the cement paste in cracks, improve the plugging stability and the like, and has a wide application prospect in oil and gas well engineering. And powerful support is provided for solving the well leakage problem of the fractured formation in the oil and gas well drilling process.

The invention provides a prepreg tape resin composition and a carbon fiber prepreg. The prepreg tape resin composition comprises the following components in parts by weight: 25-80 parts of bisphenol A type liquid epoxy resin, 20-75 parts of bisphenol A type solid epoxy resin, 15-50 parts of novolac epoxy resin, 5-20 parts of core-shell type nanoparticles, 3-8 parts of a latent curing agent and 0.5-5 parts of an accelerant, wherein the inner core of the core-shell type nanoparticle is rubber, and the shell layer of the core-shell type nanoparticle is hard plastic. Based on the synergistic interaction of the specific components and the dosage thereof, the prepreg tape resin disclosed by the invention can simultaneously consider lower curing temperature, longer storage life, better toughness and good viscosity thixotropy.

The invention belongs to the technical field of nano inorganic filler surface modification, and discloses modified nano calcium carbonate which is prepared by the following steps: reacting a nano calcium carbonate raw material with a compound modifier at 70-80 DEG C, and drying, crushing and grading after the reaction is completed, wherein the compound modifier is composed of a component A and a component B in a molar ratio of 1: (1.2-2.0); the component A is selected from p-sulfo calix [n] arene or salt thereof, and n is an integer from 4 to 8; and the component B is selected from epoxy group modified polyisoprene. According to the present invention, the modification formula of mixing the sulfonic acid calixarene compound and the epoxy group modified polyisoprene is used, the molar ratio of the two components is precisely regulated and controlled, and the exposure ratio of the active hydroxyl group in the system is reasonably controlled, such that the modification formula can be used for the modification of the nano calcium carbonate, the modified nano calcium carbonate can effectively improve the impact strength and thixotropy of the base coat and reduce the viscosity of the base coat, and finally, adaptive balance between the thixotropy and the processing fluidity is achieved.

The application discloses an injectable microsphere gel of controllable performance silk protein and a preparation method thereof, and belongs to the field of biomaterials.The preparation method comprises the following steps: preparing a regenerated silk protein solution, including degumming, dissolving and purifying of mulberry silk, and obtaining a regenerated silk protein solution with a target molecular weight through molecular weight screening; preparing a silk protein microsphere aqueous solution by adding ethanol to the regenerated silk protein solution and performing freezing and thawing; obtaining a silk protein microsphere redispersible powder by drying two solutions prepared in the above steps; and preparing a silk protein microsphere gel by dispersing the silk protein microsphere redispersible powder in a solvent and adding a gel inducer.The whole preparation process does not involve toxic chemical reagents, and thus the excellent mechanical properties, ideal biocompatibility and biodegradability of the material are ensured; the silk protein microsphere gel has thixotropy, can be injected into subcutaneous tissue through a syringe, has a certain self-supporting property after injection, has controllable mechanical properties due to the molecular weight screening, and can be used in different application scenarios.

The present invention discloses a highly thixotropic, low thermal resistance and ultra-long life thermal conductive silicone grease and its preparation method. By the compatibility of silicone oils with different degrees of branching and different end groups, a compound silicone oil with higher wettability and lubricity is obtained, reducing the friction between powders and increasing the powder filling rate; by adding nano-ABS microsphere powders, on the one hand, the thixotropy of the material is improved, and on the other hand, the high-temperature stability and shape retention ability of the thermal conductive silicone grease are improved by utilizing the characteristics of high-temperature softening and swelling of ABS at high temperatures; by adding Ce element to the Al matrix, due to the low electronegativity of Ce, more metals are provided for Al, increasing the electron density of the conduction band; at the same time, the addition of Ce can modulate the electronic structure of Al, further expanding the s-band and p-band of Al, improving the mobility of conduction band electrons, so that AlCe has a higher thermal conductivity than pure Al.

This invention relates to the field of joint sealant materials, specifically to a non-sagging joint sealant material for facades and its preparation method. The non-sagging joint sealant material comprises component A, containing polyether polyol, and component B, containing isocyanate, with a mass ratio of component A to component B of 1.5:1. Component A includes the following components: polyether polyol A, polyether polyol B, filler, chain extender A, chain extender B, light stabilizer, antioxidant, catalyst, reinforcing agent, defoamer, rheology modifier A, rheology modifier B, and dispersant. Component B includes the following components by weight percentage: polyether polyol A, liquefied MDI, defoamer, rheology modifier A, and rheology modifier B. This invention uses fumed silica as a reinforcing agent, which increases both strength and thixotropy of the material, effectively preventing sagging.

Writing, makeup and / or painting system (10) comprising a preparation with fibrous and / or thixotropic properties and an application device (1) for the preparation, wherein the application device (1) comprises: - a storage container (2) for storing the preparation - an application element (3) for applying the preparation onto a substrate - a conveying element (4) connecting the order element (3) and the storage container (2) - a pump and shear element (5) arranged at least partially in a cavity of the conveying element (4), which is at least partially reversibly movable into the storage reservoir (2) in the longitudinal direction (L) of the application device (1) between the application element (3) and the storage reservoir (2). - a conveying gap (6) formed between an inner surface (12) of the conveying element (4) and an outer surface (11) of the pump and shear element (5) for conveying the preparation from the storage reservoir (2) to the application element (3), wherein the pump and shear element (5) is configured to exert a shear force on the preparation in the conveying gap (6) by moving the pump and shear element (5) in the longitudinal direction (L) of the application device (1) at a temperature of 25 °C with a shear rate in the range of 10 / s to 10000 / s.

The invention relates to the technical field of batteries, in particular to a composition, a pole piece, a preparation method of the pole piece, a battery and electric equipment. The composition comprises thermoplastic resin and insulating particles, wherein the thermoplastic resin comprises the following components in percentage by mass: 0-30% of a structural unit from a polar monomer and 70-100% of a structural unit from a non-polar monomer. The composition has better adhesive property and thixotropic property, can better relieve the problems of diaphragm wrinkling and battery short circuit, is not easy to generate material mixing and mutual permeation with active material layer slurry during coating, can still keep better adhesive property and does not fall off after being soaked in electrolyte.