181 results about "Thixotropy" patented technology

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.

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 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.

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

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.

A composition comprising, based on the weight of the composition: a) a thermally conductive filler; b) a polyorganosiloxane functionalized with at least two ethylenically unsaturated groups; and c) a polyorganosiloxane functionalized with two terminal carbinol groups. The composition provides a thermally conductive polyorganosiloxane composite with an excellent balance of thixotropic properties and concomitant flowability, with reduced filler settling.

The application discloses a positive electrode edge coating glue, a preparation method, a positive electrode sheet and a bonding method, aims to provide a positive electrode edge coating glue with high bonding property, high thixotropy, no material overflow during coating, good electrolyte resistance, and the technical scheme is prepared by copolymerization of hard monomers, soft monomers, first functional monomers, second functional monomers, crosslinking monomers, tackifying resins, initiators and solvents; the sum of the components is 100%; the application further discloses a positive electrode sheet applying the positive electrode edge coating glue, and a bonding method of the positive electrode sheet coated with the positive electrode edge coating glue and a PP diaphragm after the positive electrode edge coating glue is coated, the quality of the positive electrode sheet after the coating is excellent, the positive electrode sheet or the coating does not appear the phenomena of falling off and brittle fracture after being folded on the positive and negative sides; and the positive electrode sheet and the PP diaphragm are firmly bonded, and do not appear the phenomena of cracking or falling off after being soaked in electrolyte for a long time; and belong to the technical field of polymers.

This application relates to the field of liquid cooling technology, and discloses a highly stable, anti-sagging liquid-cooled composite nanofluid and its preparation method. The composite nanofluid comprises: deionized water and 1,2-propanediol as the continuous phase, graphene and single-walled carbon nanotube composite particles as the dispersed phase, and introduces a ternary rheological control system composed of a rheology modifier, polyvinylpyrrolidone, and a polymeric dispersant in a specific ratio, endowing the fluid with thixotropic and anti-sagging properties. This application improves the overall service stability and thermal management reliability of the liquid-cooled composite nanofluid under alternating high-speed pumping and static shutdown conditions.

The proposed development is a rheometer device that simultaneously measures viscosity (μ) and yield strength (to) online, with measurements taken at intervals of a few minutes for mining slurries. Therefore, the design must withstand the typical conditions of a mining operation (extreme temperatures, high altitude, communication problems, distance, extreme humidity, theft, mishandling, etc.). The rheometer in this development is based on the laminar flow transport of the slurry through capillaries. This rheometer measures simultaneously in more than one capillary. The online measurement and data analysis system accounts for the effects of sedimentation, capillary or pipe wall effects, temporal effects (e.g., thixotropy and viscoelasticity), and capillary inlet effects.On the other hand, it considers losses due to changes in diameter, the oscillatory effects of the point generated by the peristaltic pump, and the overreactions generated when the speed changes. A method for operating the rheometer device is also presented.

Provided are a copper ink that suppresses bleeding when printing copper ink on a substrate and makes it possible to manufacture a highly reliable circuit pattern with few short circuits, and an electronic circuit board using the same and a method for producing an electronic circuit board. The present invention is a copper ink containing copper particles, wherein the thixotropy index TI, defined by the ratio (η1 / η10) of the viscosity η10 at a shear rate of 10 sec-1 to the viscosity η1 at a shear rate of 1 sec-1, is 7.5 or less and the hysteresis area of shear stress by dynamic viscoelasticity measurement, when the shear rate is raised from 0.01 sec-1 to 300 sec-1 over 50 seconds, held at 300 sec-1 for 50 seconds, and lowered from 300 sec-1 to 0.01 sec-1 over 50 seconds, is 3000 Pa∙sec-1 or more.

The application discloses a novel conductive chest strap preparation method, a permeable conductive reinforcing composition and a surface micro-erosion pretreatment gel. The method first weaves a segmented belt containing stretchable areas and non-stretchable electrode collection areas; then a thixotropic pretreatment gel is coated on the surface of the electrode area, a micro-erosion layer is formed on the surface of the fiber by using a solvent; then the permeable conductive reinforcing composition is forcedly absorbed into the fiber bundle under the condition of vacuum negative pressure; finally, the resin and the fiber form an interpenetrating network and chemical bonding through gradient temperature curing. Through the synergistic effect of physical structure restriction and micro-chemical anchoring, the application solves the problems of easy delamination and cracking of the conductive layer and unstable contact impedance in the traditional process, meanwhile, the gel characteristics are used to block the solvent wicking and diffusion, the elasticity of the substrate is effectively protected, and the durability and signal collection accuracy of the product are significantly improved.

A coating composition for packaging materials, such as paper, paperboard and plastic, where the composition comprises a thixotropic aqueous mixture comprising at least one smectite clay, a water-soluble polymer, and a cross-linking agent for cross-linking the clay and the polymer; a process for its application, in which the composition is applied to a packaging material and treated to crosslink the clay and the polymer; and methods and uses thereof for improving the barrier properties of packaging materials.

The invention relates to gel pen ink with low temperature resistance, which adopts a humectant A capable of enabling an ink system to have a low freezing point, a humectant B capable of endowing the ink system with high moisture retention, and a humectant C capable of endowing the ink system with auxiliary moisture retention and lubricity, so that a water-based organic solvent system has the characteristic of low freezing point; the freezing point of the ink is reduced, so that the problem of phase separation caused at low temperature is avoided, and the gel pen ink can be maintained to have good moisturizing performance and certain lubricity so as to maintain good writing smoothness; a compound system of the high-shear thickening agent A and the low-shear thickening agent B is adopted, so that the ink can still keep good non-Newtonian fluid characteristics at a low temperature and has normal viscosity and thixotropic performance, meanwhile, the viscosity stability of the ink is maintained by using the antifreeze agent, the problem that the viscosity of the ink is suddenly changed due to environment change is avoided, and the viscosity stability of the ink is improved. Therefore, the stability of the ink is maintained.

The present invention aims to provide a dispersion liquid comprising fine fibrous cellulose dispersed in an organic solvent, which has high thixotropy. [Solution] The present invention relates to a dispersion containing fibrous cellulose with a fiber width of 1000 nm or less and an organic solvent, wherein the fibrous cellulose has anionic groups, the content of anionic groups is 0.50 mmol / g or more, the fibrous cellulose has an organo-onium ion as a counterion to the anionic groups, and the B-type viscosity measured by measurement method (A) is 50 Pa·s or more.

This invention discloses a high-elasticity three-dimensional adhesive composition for multiple overprinting and its preparation method, belonging to the field of three-dimensional coating materials technology. The composition comprises a polyurethane-polyurea interpenetrating network polymer emulsion, an organosilicon-modified waterborne polyurethane-acrylate hybrid emulsion, a crosslinking agent, functional composite fillers, a thickener, a dispersant, an antifoaming agent, additives, a pH adjuster, and deionized water. This invention constructs a dual crosslinking system of polyurethane-polyurea interpenetrating network and organosilicon hybrid emulsion, and combines it with rutile titanium dioxide, surface-modified nano-calcium carbonate, and nano-silica functional fillers. Combined with a nonionic polyurethane associative thickener to regulate rheological properties, the adhesive possesses high elastic recovery, anti-blocking properties, and strong thixotropic properties. During multiple overprinting, the adhesive can quickly set, without flowing or collapsing, with strong interlayer bonding, clear three-dimensional edges, and a smooth coating surface with excellent water and solvent resistance.

This invention discloses a clearance testing machine and method for automotive wheel hub units, belonging to the field of precision testing and automated control technology for automotive parts. The method includes: setting up a probe assembly comprising a primary main drive and a secondary vibration unit, and a multi-point hydraulic adaptive floating support platform below it; placing the automotive wheel hub unit on the platform, utilizing Pascal's principle to connect the hydraulic column, and automatically finding equipotential surfaces through fluid flow to eliminate tilting errors caused by microscopic unevenness; driving the probe to feed and generate axial shear vibration, utilizing thixotropy to destroy the grease network structure and liquefy it, thereby eliminating the virtual stiffness of the oil film; real-time monitoring and feedback, maintaining a static micro-load, and when the system determines a sudden change in stiffness from viscosity to elasticity, locking the position reading and calculating the axial clearance. This invention effectively avoids measurement data distortion caused by workpiece machining tolerances or clamping tilt, significantly improving the physical reference accuracy of clearance testing.