876results about How to "Adjustable viscosity" patented technology

The present invention relates to processes for preparing a stable suspension of carbon nanoparticles in a thermal transfer fluid to enhance thermal conductive properties, viscosity, and lubricity. One process is to disperse carbon nanoparticles directly into a thermal transfer fluid and other additives in the present of surfactants with intermittent ultrasonication. The second process is carried out in three stages. First, carbon nanoparticles are dispersed into a volatile solvent. Then, a thermal transfer fluid, surfactants, and other additives are added into this intermediate dispersion and mixed thoroughly. At last, the volatile solvent is removed to produce a uniformly dispersed nanofluid. The third process is to disperse carbon nanoparticles at an elevated temperature into a homogeneous mixture of surfactants and other additives in a thermal transfer fluid with help of a physical agitation. The present invention also relates to compositions of carbon nanoparticle nanofluids, such as nanolubricants and nanogreases. The nanofluid of the present invention is a dispersion of carbon nanoparticles, particularly carbon nanotubes, in a thermal transfer fluid in the present of surfactants. Addition of surfactants significantly increases the stability of nanoparticle dispersion. For nanogreases, carbon nanoparticles function both as a thickener to modulate viscosity and as a solid heat transfer medium to enhance thermal conductivity and high temperature resistance.

A downhole tool that includes a tractor for assisting movement of the tool through deviated portions of a wellbore. The tractor includes a working fluid that damps vibrations in the tractor by adjusting the viscosity in the fluid. In an example, the working fluid is a magnetorheological fluid that has a viscosity that changes in response to applied electrical energy. The working fluid, which may be used for powering actuators on the tractor, may contain a suspension of magnetic particles.

The invention discloses a bi-component conductive polyurethane pouring adhesive and a preparation method thereof, wherein a component I is obtained by evenly mixing polymer polyol, chain extenders, catalytic agents, antifoaming agents and modified thermal fillers, and a component II is isocyanate. When in specific use, the two components are evenly mixed and solidified after pouring. The pouring adhesive is free of solvent, environment-friendly, moderate in viscosity and capable of being solidified at the normal temperature or rising temperature, and has the advantages of being good in insulation, flexibility, adhesion and low-temperature performance, capable of being used in a wide temperature range and the like, and has the conductive factor as high as 1.5W/m*K.

The invention belongs to the modified emulsified asphalt field, and more specifically relates to a SBS polymer modified emulsified asphalt and a preparation method, the SBS polymer modified emulsified asphalt is prepared by the following raw materials by mass percentages: 40-65% of SBS polymer modified emulsified asphalt, 25-50% of water, 2-10% of cation asphalt emulsifier, 0.1-2.0% of composite emulsified stabilizing agent and 0.2-2.0% of acid, wherein SBS polymer modified asphalt is prepared by mixing and reacting a SBS polymer modifier and matrix asphalt, and the mass of the SBS polymer modifier accounts for 3.5%-5.5% of that of the SBS polymer modified asphalt. The prepared SBS polymer modified emulsified asphalt has stable property, and can be used as a cement asphalt mortar layer and the like for a road tack coat, a seal layer, surface treatment, a slurry seal layer and a high speed railway plate-type ballastless track.

The invention discloses paste for a lithium ion battery ceramic diaphragm. The lithium ion battery ceramic diaphragm comprises a basic membrane and a coating coated on a single side or double sides of the basic membrane. Paste adopted for the coating is paste which is formed in the mode that inorganic nanoparticles and whiskers are composited with a basic material and water. The inorganic nanoparticles are prepared from one of alumina, boehmite, silicon dioxide and barium sulfate, the whiskers are prepared from one of alumina and boehmite, and the basic material is prepared from a thickening agent, a dispersing agent and an adhering agent. The paste can continuously form a uniform inorganic nanometer and whisker coating on PE/PP in a roller painting mode, and the composite diaphragm with the ultra-thin coating and high adhesive force is obtained through drying. The composite diaphragm can effectively reduce the heat-shrinkage rate of the lithium ion battery ceramic diaphragm, and compared with a traditional composite diaphragm prepared from single inorganic particle paste, the ultrathin coating is favorable for increase of air permeability and ionic conductivity, and space in a battery and paste cost are saved.

A process for the airless spray-coating of a surface with a aqueous-containing Newtonian or non-Newtonian architectural coating composition wherein the composition can contain an associative thickener and is subjected to a pressure of from 2 to 5 bar generated such as by a hand-operated or battery operated electrical compressor and then sprayed from a slot-shaped outlet orifice (52) in a nozzle (50) to produce an outflow (31) of composition having boundaries (35) which diverge at least until it has formed a front of at least 30 mm in width. The composition preferably has a Brookfield viscosity of at least 0.5 pa.sec and a solids content of 7 wt %. Also apparatus for performing the process comprising a container containing the coating compositions together with a nozzle having an outlet orifice, a compressor and a pressure release valve actuatable in the pressure range 2 to 5 bar and preferably an auxiliary orifice upstream of the outlet orifice. The process and apparatus enable the viscous compositions to be applied quickly using low pressures easily generated by a hand compressor.

The invention relates to the technical field of ceramic tiles and specifically relates to a slate ceramic tile with a diamond gloss effect and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a blank material into a blank tile; (2) applying a ground coat; (3) printing slate patterns; (4) applying a transparent glaze; (5) applying a diamond flashingdry granular glaze; (6) sintering the blank tile, thereby acquiring the slate ceramic tile with the diamond gloss effect. According to the invention, the slate ceramic tile with diamond flashing grains and cleavage luster is prepared by applying the ground coat to the blank surface with various performances and then using the later slate patterns, the transparent glaze and the dry granular glaze with strong flashing effect. A glittering reflecting effect of obvious small granular flashing grains, similar to a plurality of fine diamonds, on the ceramic tile surface can be seen under natural light. Under irradiation of projector lamps, such a diamond-like reflecting effect is more obvious and the decorative effect of the ceramic tile product is enhanced.

The invention relates to a water-based zinc stearate dispersion liquid, the main component of which is zinc stearate, and a preparation method thereof. The dispersion liquid is mainly used as a coating lubricating agent for papermaking, a sensitizing agent for heat-sensitive paper, and a functional auxiliary agent for water-based paint. The dispersion liquid is prepared from the zinc stearate, emulsifier A, emulsifier B, auxiliary agent, dispersing agent, de-foaming agent, bactericide and water. The method for preparing the dispersion liquid comprises the following steps: adding the zinc stearate, emulsifier A, emulsifier B, auxiliary agent, dispersing agent, de-foaming agent, bactericide and water into a high-pressure reactor according to a certain proportion, sealing the reactor, heating to 140-180 DEG C, stirring for 1 hour at constant temperature, quickly cooling to room temperature, thereby obtaining the target product. The method is simple and convenient, the process is reasonable, and the prepared water-based zinc stearate dispersion liquid has the advantages of low cost, small grain size, high solid content, small viscosity and high efficiency.

A method of recycling an abrasive slurry for recycling a slurry that: contains colloidal silica; and has been used in polishing semiconductor wafer(s) is provided. The method includes: adding a dispersant to the used slurry having been collected so as to prevent the used slurry from being gelled; irradiating ultrasound to the used slurry having been added with the dispersant so as to disperse a gelled portion and aggregated silica in the used slurry; and, by using a filter, removing a foreign substance contained in the used slurry having been irradiated with the ultrasound.

The present invention relates to one kind of plant leavening prepared by using plant with hot and fragrant smell of propylene sulfide, yeast and lactobacillus and through fermentation. The present invention also relates to the preparation process of the leavening and its application is treating presbyopia, cataract and other diseases, promoting blood circulation; improving the functions of sexual organs, kidney, cardiac and cerebral vascular system, digestive system, etc.; resisting oxidation, senility and fatigue; lowering blood fat, blood sugar and blood pressure; etc.

The invention discloses a double-component solvent-free polyurethane adhesive and a preparation method thereof. The adhesive comprises a component A and a component B, wherein the component A comprises the following components in percentage by weight: 5-10% of polyether polyol, 30-40% of polyester polyol, 55-65% of isocyanate, 0.02-1% of a chain expander, 0.1-0.3% of a catalyst and 0.03-1% of an assistant. The component B comprises a uniform mixture of 60-80% of polyester polyol and 20-40% of polyether polyol. The adhesive disclosed by the invention has the advantages of adjustable performance, great binding strength, random adjustment of viscosity according to actual use and the like, and is a green and environment-friendly polyurethane adhesive which is excellent in performance.