258 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.

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 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 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 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.

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 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.

Provided is a hot melt adhesive for insulating glass spacer, prepared from raw materials comprising the following components: 1-10 parts by weight of butyl rubber, 25-50 parts by weight of a polyisobutylene mixture; 5-15 parts by weight of a tackifying resin; 1-15 parts by weight of a tackifier; 5-15 parts by weight of a polymer; 0.1-1 part by weight of a lubricant; 0.1-1 part by weight of an antioxidant; 15-50 parts by weight of a filler; 1-10 parts by weight of a water absorbent; and 5-25 parts by weight of carbon black. Compared with the prior art, in the hot melt adhesive for insulating glass spacer provided in the present disclosure, components with specific contents are used, such that relatively good overall interaction is achieved, the thixotropy of the product is good, and the adhesion to both silicone sealant and glass is excellent.

The application relates to the technical field of highway maintenance, in particular to a highway drainage ditch self-leveling mortar and a preparation method thereof. The highway drainage ditch self-leveling mortar is prepared from at least gelatinous material and 20-200 mesh graded aggregate, the mass ratio of the gelatinous material and the graded aggregate is (14-17):(9-12), and a composite reinforcing agent and a functional additive are further added. The application greatly improves the core contradiction that the self-leveling performance and the structural durability cannot be simultaneously considered in the construction of the highway drainage ditch, the prepared mortar has excellent fluidity and thixotropy in the construction, can automatically flow and evenly cover on the inclined ditch wall, effectively avoids defects caused by manual troweling, greatly improves the construction efficiency and the forming quality, and the structure formed after hardening is compact and has a self-reinforcing characteristic.

The invention belongs to the technical field of embedded steel bar adhesives, and particularly relates to a low-temperature quick-drying embedded steel bar adhesive which comprises a material A and a material B. The material A comprises the following components in parts by weight: 18-22 parts of epoxy resin, 4.8-5.3 parts of a diluent, 0.5-0.6 part of first white carbon black and 18-22 parts of first silica powder; and the material B comprises the following components in parts by weight: 10-12 parts of a curing agent, 0.1 part of a coupling agent, 0.5-0.8 part of second white carbon black, 6.5-11.5 parts of second silica powder and 0.03-0.06 part of color paste. The overall structure provided by the embodiment of the invention has certain thixotropy and does not flow during construction; good bonding performance with most structural materials is achieved; the adhesive is free of crystallization and low-temperature curing, can well meet various requirements specified in the national standard, meets the construction requirement at the low temperature of-10 DEG C, can be stressed for 2 hours at the normal temperature of 23 DEG C, is high in corrosion resistance, does not flow during construction, and has high adhesive property.

The invention relates to the technical field of caulking glue materials, in particular to a facade sagging-free caulking glue material and a preparation method thereof. The facade sagging-free caulking adhesive material comprises a component A containing polyether polyol and a component B containing isocyanate, and the mass ratio of the component A to the component B is 1.5: 1; the component A comprises the following components: polyether polyol A, polyether polyol B, a filler, a chain extender A, a chain extender B, a light stabilizer, an antioxidant, a catalyst, a reinforcing agent, a defoaming agent, a rheology modifier A, a rheology modifier B and a dispersing agent; and the component B comprises the following components in percentage by weight: polyether polyol A, liquefied MDI, a defoaming agent, a rheology modifier A and a rheology modifier B. The fumed silica is used as a reinforcing agent, so that the thixotropy of the material can be improved while the strength is improved, and sagging is effectively prevented.

The application provides an alumina ceramic composite colloidal tungsten paste and a preparation method and application thereof. According to mass percentage, the tungsten paste comprises 70-90% conductive metal tungsten powder, 1-15% inorganic bonding phase, 5-25% organic carrier A, and 1-10% organic carrier B. The organic carrier A comprises 10-25% organic binder, 5-40% plasticizer, 5-90% solvent, and 1-5% modified montmorillonite. The organic carrier B comprises 5-20% organic binder, 10-60% plasticizer, and 5-90% solvent. The modified montmorillonite is polyether polyol modified montmorillonite. The application improves the flowability, thixotropy and printing resolution of the paste by compounding the organic carrier A and the organic carrier B, and the sintering matching with the ceramic substrate is good, the flatness is high, the adhesion is strong, and the paste can meet the requirements of other multilayer ceramic processes such as lamination, layering, green cutting and the like.

This invention provides a silicon quantum dot modified composition, modified silicon quantum dots, a thickener, a thickener system, drilling fluid, and completion fluid. The silicon quantum dot modified composition comprises an organic solvent and two modifying agents. When the silicon quantum dots obtained by further modification of this silicon quantum dot modified composition are used as thickeners in high-salinity drilling and completion fluids, the thickener exhibits excellent high-temperature resistance and continues to provide good rheological and thixotropic properties even after aging.

The application relates to the technical field of electronic packaging and discloses a glue sealing method for embedding FPC into a wearable device mold. The method comprises the following steps: cleaning and activating the surface of the FPC; coating a reactive thixotropic interface anchoring agent at a preset position, the anchoring agent is made of thermoplastic polyurethane, hydrophobic modified fumed silica and latent curing micro powder containing isophorone diisocyanate dimer and a temperature-sensitive catalyst, and a solid-state pre-gel layer with thixotropy is formed after drying; the FPC is loaded into the mold, and the pre-gel layer is used to realize suspension fixing by utilizing the friction force between the pre-gel layer and the mold wall; low-pressure injection molding is carried out, and the heat of the melt is used to initiate ring-opening crosslinking of the micro powder. The physical limiting effect of the pre-gel layer solves the problem of FPC injection positioning deviation, and the in-situ chemical reaction is excited by using the heat of pressure maintaining, urea-formaldehyde ester bonding and semi-interpenetrating networks are generated at the interface, and the bonding strength and the moisture and heat resistance reliability of the packaging interface are improved.

The invention provides terminated branched unsaturated polyester suitable for light-cured glass fiber reinforced plastic as well as a preparation method and application of the terminated branched unsaturated polyester. The method comprises the following steps: mixing saturated dicarboxylic acid, unsaturated dicarboxylic acid, saturated tricarboxylic acid, saturated dihydric alcohol and an antioxidant, and carrying out condensation reaction to obtain unterminated branched unsaturated polyester; and mixing the obtained unterminated branched unsaturated polyester with an aminated silane coupling agent and a condensing agent, and carrying out an amidation reaction to obtain the terminated branched unsaturated polyester. The end-capped branched unsaturated polyester prepared by the invention has the characteristics of low viscosity and high transparency; the resin system contains silicon hydroxyl, so that the resin system is endowed with thixotropic property while the interaction with the glass fiber is facilitated; by changing the variety and dosage of the synthetic raw materials, the molecular weight, the branched structure and the number of silicon hydroxyl contained in a molecular chain can be adjusted, so that the prepared unsaturated polyester has wide application prospects in the fields of mold pressing, lamination, hand lay-up and injection molding of light-cured glass fiber reinforced plastics.

To provide a cellulose microfiber dried product containing a polyacrylate or polyacrylic acid, the cellulose microfiber dried product being capable of suppressing aggregation of cellulose microfibers during drying and maintaining thixotropy upon redispersion.SOLUTION: There are provided a cellulose microfiber dried product containing cellulose microfibers and a polyacrylate or polyacrylic acid having an average molecular weight of 100,000 or more, and a method for producing the cellulose microfiber dried product.SELECTED DRAWING: None

To provide a binder resin composition for baking which is excellent in baking property, has high viscosity, and has high thixotropy property and thread breakage property, a metallic paste, an inorganic sintered body, an electronic device, and a solar panel.SOLUTION: A binder resin composition for baking contains a (meth)acrylic polymer (I) having a crosslinked structure, wherein when solid content concentration of the binder resin composition for baking is 7 mass%, viscosity (η1) at 23°C measured at a shear rate of 1(1 / s) is 10 Pa s or more.SELECTED DRAWING: None

The invention relates to a writing, makeup and / or painting system (10) comprising a preparation with viscous and / or thixotropic properties and an application device (1) for the preparation, wherein the application device (1) comprises a reservoir (2) for storing the preparation, an application element (3) for applying the preparation to a substrate, a conveying element (4) connecting the application element (3) and the reservoir (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 reservoir (2) in the longitudinal direction (L) of the application device (1), and 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 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 discloses a high-bonding-strength waterproof adhesive tape for a rough surface and a preparation method of the high-bonding-strength waterproof adhesive tape, and belongs to the technical field of functional adhesive tape, the adhesive tape sequentially comprises a release layer, a high-bonding-strength adhesive layer and a reinforced base material layer from bottom to top, the adhesive layer takes a mixture of butyl rubber and polyisobutene as a main polymer, and the reinforced base material layer takes a mixture of butyl rubber and polyisobutene as an auxiliary polymer; and the raw materials such as ternary compound tackifying resin of C5 petroleum resin, C9 petroleum resin and hydrogenated rosin glyceride, and nano reinforcing filler treated by a silane coupling agent are matched. The preparation method adopts a hot melting coating process, and comprises the following steps: banburying, coating and compounding, rolling and curing. The adhesive tape has high thixotropy and good wettability, can adapt to rough surfaces of concrete, painted metal and the like, is excellent in initial adhesion and bonding strength, high in water resistance and weather resistance, convenient to construct and suitable for gap sealing and water resistance in the fields of buildings, pipelines and the like, and the preparation process is environment-friendly and efficient.

Sprayable joint compound compositions, building construction assemblies and methods, including methods for finishing joint seams and methods for installing interior walls and ceilings, the sprayable joint compound compositions having a thixotropic property and the sprayable joint compound compositions comprising a combination of a thixotropic rheological modifier, a polyacrylic dispersant and a hydrophobic lightweight filler.