186results about How to "Prevent gel" patented technology

Ionic liquids and cellulose ester compositions and processes and apparatus for producing ionic liquids and cellulose esters. Cellulose esters can be produced by dissolving cellulose in carboxylated ionic liquids and thereafter contacting the cellulose solution with at least one acylating reagent. Cellulose esters produced via the present invention can comprise ester groups that originate from the carboxylated ionic liquid and / or the acylating reagent.

Ionic liquids and processes and apparatus for their production. The ionic liquids can be low sulfur and low halide carboxylated ionic liquids. The ionic liquids can be produced via formation of at least one intermediate carboxylated ionic liquid, and thereafter subjecting the intermediate carboxylated ionic liquid to at least one anion exchange process.

Ionic liquids and processes and apparatus for their production. The ionic liquids can be low sulfur and low halide carboxylated ionic liquids. The ionic liquids can be produced via formation of at least one intermediate carboxylated ionic liquid, and thereafter subjecting the intermediate carboxylated ionic liquid to at least one anion exchange process.

The invention discloses gel electrolyte capable of prolonging the service life of a lead-acid battery. The gel electrolyte contains the following raw materials in percentage by weight: 0.1 to 0.5 percent of polyethylene glycol, 0.1 to 1 percent of stannous sulfate, 0.5 to 1.5 percent of sodium sulfate, 0.5 to 1 percent of phosphoric acid, 0.05 to 2 percent of an organic silicon polymer, 0.5 to 8 percent of fumed silica, 35 to 45 percent of sulfuric acid and the balance being de-ionized water. According to the gel electrolyte, the polyethylene glycol is used as a colloid stabilizer and can prevent colloids from being gelled or agglomerated before being filled into the battery and enhance the stability of the colloids to form a stable three-dimensional mesh structure; the stannous sulfate can be oxidized into stannic tin to improve the electrical conductivity of an active substance and the recharging capability of the battery which is discharged; the sodium sulfate can provide a certain quantity of sulfate radicals for electrochemical reaction in the electrolyte to reduce the degree of supersaturation of lead sulfate crystals; silicon-oxygen bonds and hydrogen bonds in the organic silicon polymer can effectively reduce the softening speed of the active substance, inhibit the passivation of the active substance on the surface layer and prolong the service life of the battery.

The invention relates to a preparation method for a superhydrophobic coating with condensation microdroplet self-bouncing properties. The preparation method comprises the following steps: with a waterborne chain type silica sol as a raw material, carrying out dilution and dispersion with an alkaline aqueous solution so as to effectively prevent the waterborne silica sol from agglomeration, then carrying out dispersing in a volatile organic solution, adding tetraethyl orthosilicate, fluoroalkyl silane and the like into the obtained dispersion liquid, then subjecting silica sol particles to surface modification, and carrying out continuous mechanical stirring so as to obtain the superhydrophobic coating. The coating can be applied to a variety of soft and hard substrates through manners of spraying, dipping, pulling, rolling or brushing, thereby obtaining the superhydrophobic surface with a porous nanometer structure, wherein the porous nanometer structure also enables condensation microdroplets to obtain self-bouncing properties. The coating has extensive application in the aspects of surface self-cleaning and corrosion and mildew prevention, especially in the aspects of condensation heat transfer, water collection, frost prevention, ice resisting, etc. The preparation method provided by the invention has the characteristics of simple preparation process and equipment, easiness in operation, low cost, etc., and is applicable to large-scale preparation and industrial production.

A heated fuel delivery system for vegetable oil or other fuels of temperature dependent viscosity, which may be used as fuel for a diesel engine. The system includes one or more heated fuel lines and / or a heated fuel tank to heat the fuel and reduce its viscosity for more efficient use. Recovered engine heat from the engine coolant system is transferred to heat the fuel.

For the production of acrylonitrile by ammoxidation of propylene, there is provided a process capable of giving a high yield and maintaining such an effect for a long period of time.In producing acrylonitrile by ammoxidation of propylene, a fluidized bed catalyst is used and the reaction is carried out while appropriately adding a molybdenum-containing material, wherein the fluidized bed catalyst contains molybdenum, bismuth, iron, nickel, chromium, potassium, an F component and silica as essential components, and has a number of Mo / Me of from 0.8 to 1, wherein the Mo / Me is a number obtained by dividing the product 20 of a valence number of molybdenum as molybdic acid and an atomic ratio of molybdenum by the sum of respective products of respective valence numbers and atomic ratios of bismuth, iron, nickel, chromium, potassium, the F component element, a G component element and a Y component element.

The invention discloses a flame-retardant heat conductive insulation silicone rubber product for power equipment. The flame-retardant heat conductive insulation silicone rubber product comprises a bonding layer and a heat conductive insulation layer, wherein the bonding layer is arranged below the heat conductive insulation layer, the thickness of the bonding layer ranges from 0.05 mm to 0.1 mm, the thickness of the heat conductive insulation layer ranges from 0.5 mm to 3.5 mm, and the heat conductive insulation layer comprises a silicon rubber insulation layer. The invention further discloses a preparing method of the silicon rubber product. The obtained silicon rubber product is easy to construct and capable of being tightly attached to power equipment, heat generated in the running process of power equipment can be effectively led out, and human casualty accidents caused by pollution flashover, condensate flashover, small animal short circuiting and naked busbars in transformer substations are also effectively eliminated.

A heated fuel delivery system for vegetable oil or other fuels of temperature dependent viscosity, which may be used as fuel for a diesel engine. The system includes one or more heated fuel lines and / or a heated fuel tank to heat the fuel and reduce its viscosity for more efficient use. Recovered engine heat from the engine coolant system is transferred to heat the fuel.

The invention discloses a colloid electrolyte can improve the service life of a lead-acid cell, and the colloid electrolyte comprises the following raw materials by weight: 0.1-0.5% of polyethylene glycol, 0.1-1% of stannous sulfate, 0.5-1.5% of sodium sulfate, 0.5-1% of phosphoric acid, 0.05-2% of organosilicon polymer, 0.5-8% of fumed silica, 35-45% of sulfuric acid, and balanced of deionized water. The polyethylene glycol as a colloid stabilizer can prevent the occurrence of colloid coacervation or agglomeration before colloid is poured into the cell, colloidal stability is enhanced, and a stable three-dimensional network structure is formed; the stannous sulfate can be oxidized to tetravalent tin, the active material electrical conductivity and recharge ability after the cell is discharged can be improved, the sodium sulfate in the electrolyte can provides a certain amount of sulfate radicals for the electrochemical reaction, the degree of supersaturation of lead sulfate crystals can be reduced, formation of a lead sulfate layer with poor electrical conductivity can be prevented; the phosphoric acid can refine the grain diameter of the lead sulfate crystals; and silicon oxygen bonds and hydrogen bonds in the organosilicon polymer can effectively reduce the active material softening speed, inhibit the surface active material passivation, and improve the service life of the cell.

The invention relates to water-based fluorosilicone acrylic resin, which has a general molecular formula shown as the accompanying drawing, wherein x and y are respectively any one integer from 1 to 200; R1 is H or CH3; R2 is COOH, COO(CH2)3CH3, COOCH3, COO(CH2)2OH, COOCH2CF3, COOCH2CF2CHFCF3 or COOCH2CF(CF3)CHFCF(CF3)2; R3 is a silicon-containing chain section. The invention also discloses a preparation method of the water-based fluorosilicone acrylic resin. By a fine emulsion polymerization method, a fluorine-containing chain section and a silicon-containing chain section are simultaneously introduced into the resin, so that the performance of the water-based fluorosilicone acrylic resin is better; the preparation cost is lower.

This invention relates to novel compositions comprising regioselectively substituted cellulose esters. One aspect of the invention relates to processes for preparing regioselectively substituted cellulose esters from cellulose dissolved in ionic liquids. Another aspect of the invention relates to the utility of regioselectively substituted cellulose esters in applications such as protective and compensation films for liquid crystalline displays.