122 results about "Dibutyl ether" patented technology

Polysilazane is treated with a single or mixed solvent comprising one or more members selected from the group consisting of xylene, anisole, decalin, cyclohexane, cyclohexene, methylcyclohexane, ethylcyclohexane, limonene, hexane, octane, nonane, decane, a C8-C11 alkane mixture, a C8-C11 aromatic hydrocarbon mixture, an aliphatic / alicyclic hydrocarbon mixture containing 5 to 25% by weight of C8 or more aromatic hydrocarbons, and dibutyl ether, wherein the number of 0.5 micron or more fine particles contained in 1 ml of the solvent is 50 or less. As the treatment of polysilazane, there are illustrated, for example, edge-rinsing and back rinsing of a polysilazane film formed by spin coating polysilazane on a semiconductor substrate. The water content of the solvent is preferably 100 ppm or less.

Polysilazane is treated with a single or mixed solvent comprising one or more members selected from the group consisting of xylene, anisole, decalin, cyclohexane, cyclohexene, methylcyclohexane, ethylcyclohexane, limonene, hexane, octane, nonane, decane, a C8-C11 alkane mixture, a C8-C11 aromatic hydrocarbon mixture, an aliphatic / alicyclic hydrocarbon mixture containing 5 to 25% by weight of C8 or more aromatic hydrocarbons, and dibutyl ether, wherein the number of 0.5 micron or more fine particles contained in 1 ml of the solvent is 50 or less. As the treatment of polysilazane, there are illustrated, for example, edge-rinsing and back rinsing of a polysilazane film formed by spin coating polysilazane on a semiconductor substrate. The water content of the solvent is preferably 100 ppm or less.

The invention discloses an advanced locomotive brake fluid composition, and relates to a car brake fluid composition, and the advanced locomotive brake fluid composition is invented fro solving the problems of poor compatibility, poor corrosion resistance and poor low-temperature performance of an existing car brake fluid. The advanced locomotive brake fluid composition is prepared from the following raw materials in percentage by weight: 60-74% of triethylene glycol monomethyl ether borate, 10-21% of di-ethylene glycol di-butyl ether, 14-20% of a polyalcohol rubber expansion restraint, 0.1-1.0% of an antioxidant, 0.1-1.0% of a preservative and 0.5-1.0% of a pH regulator. A preparation method for advanced locomotive brake fluid composition comprises the following steps: preparing triethylene glycol monomethyl ether borate from triethylene glycol monomethyl ether and borate at a weight ratio of 10 to 1; then, adding raw materials into a reaction kettle, stirring for 60 minutes at a normal temperature under normal pressure, and keeping the stirring speed at 50r / min; and after sufficiently mixing and dissolving various raw materials, sampling, detecting, filtering and guiding the raw materials into a finished product tank. The advanced locomotive brake fluid composition has the advantages of good compatibility, good corrosion resistance and good low-temperature performance.

Crude butyl acrylate streams, e.g., from the reaction of butanol and acrylic acid, are refined using a splitter distillation column to yield a butyl acrylate- and heavies-containing bottoms fraction and an overhead fraction containing dibutyl ether, butyl acetate, butanol and butyl acrylate. The bottoms fraction is then subjected to separation, e.g., by distillation, to separate heavies from the bottoms fractions and to recover butyl acrylate. A process for the production of butyl acrylate is also disclosed, which process comprises not only the above-mentioned refining steps but also includes the steps of withdrawing from the splitter distillation column the overhead fraction and distilling the overhead fraction to recover a bottoms stream containing butanol and butyl acrylate, at least a portion of which could be recycled for reaction with acrylic acid to make butyl acrylate, and recovering the separated heavies, at least a portion of which could be recycled to a reaction zone for the production of butyl acrylate. At least 10,000 lb(avoir) quantities of a butyl acrylate product comprising at least 99.8% by weight of butyl acrylate and containing not more than about 200 ppm butyl ether and not more than about 200 ppm butyl acetate are producible.

The invention provides a safe sole material and a preparation method thereof. The safe sole material comprises, by weight, 100 parts of TPE, 150 parts of PS, 111 parts of PE, 70 parts of rice bran, 22 parts of dibutyl ether, 36 parts of ethyl acetate, 27 parts of thiosulfate, 18 parts of olive oil, 19 parts of acetone and 10 parts of aniline. The preparation method for the safe sole material comprises the following steps: mixing above-mentioned components in proportion and placing obtained mixture in an internal mixer for banburying; granulating the mixture after banburying with a granulator so as to obtain particles; cooling the particles in a water tank and drying the particles at room temperature. Soles prepared from the safe sole material provided in the invention are antistatic and oil resistant, have a good heat insulating and cold-proof effect, and are applicable to a variety of work environments.

Disclosed is a method of manufacturing a semiconductor device comprising forming an element isolation trench in a semiconductor substrate, coating a polysilazane perhydride solution on the semiconductor substrate having the element isolation trench formed thereon to form a polysilazane perhydride film, the polysilazane perhydride solution comprising dibutyl ether having a butanol concentration of 30 ppm or less, and polysilazane perhydride dissolved in the dibutyl ether, subjecting the polysilazane perhydride film to oxidation in an atmosphere containing water vapor to form a silicon dioxide film, and selectively removing the silicon dioxide film to leave the silicon dioxide film in the element isolation trench to form an element isolating insulation film.

The invention discloses a method for preparing hexafluoropropylene oxide through molecular oxygen liquid-phase oxidation. A reaction solvent adopted for reaction is perfluorinated dibutyl ether or perfluorinated diamyl ether, and because the reaction solvent has excellent dissolving property on hexafluoropropylene and oxygen and has good chemical stability and heat stability, the method disclosed by the invention has the characteristics of high reaction speed, high transformation rate and selectivity, environmental friendliness and the like and is suitable for industrialized production.

The invention relates to electrolysis solution and a preparation method thereof as well as a preparation method for an obtained aluminum capacitor. The electrolysis solution is composed by the components according to the following weight by parts: 38.5-85.7 wt % of primary solvent, 5-25 wt % of auxiliary solvent, 4-20 wt % of solute, 5-15 wt % of modified additive, 0.2-1 wt % of hydrogen eliminating agent and 0.1-0.5 wt % of waterproof combination agent. The primary solvent is glycol; the auxiliary solvent is one or more of tributyl phosphate, mono butyl ester phosphate, diglycol dibutyl ether; the solute is one or more of ammonium sebacate, 1.6-dodecyl ammonium bisgallic acid, 1.10-dodecyl ammonium bisgallic acid organic carboxylate. In the preparation method for the aluminum capacitor using the electrolysis solution, positive pressure and vacuum-pumping is required to be applied in an impregnation tank in an alternate recycle way with the recycle impregnation interval period being 20-60min.The electrolysis solution has the characteristics of high temperature resistance, high sparking pressure and strong corrosion resistance. The screw large capacitor has a service life of 8,000 hours at 105 DEG C or 2,000 hours at 125 DEG C.

The invention discloses an elastic puncture-proof sole material, which is made from the following raw materials by weight: 40-45 parts of fluorinated silicone rubber, 80-88 parts of butadiene rubber, 12-20 parts of diethylene glycol, 12-20 parts of dimethylformamide, 5-8 parts of dibutyl ether, 12-16 parts of carbon black, 8-10 parts of a calcium zinc salt, and 10-18 parts of petroleum wax. A sole made from the sole material disclosed in the invention has good elasticity and puncture-proofness, so the sole material is suitable for industrialized production.

The invention discloses an anti-blocking device of a system for rectifying poly-methoxy dibutyl ether and a method for refining the same. The system comprises a rectifying tower, a reboiler, a condensation cooler, a reflux tank and a reflux pump which are sequentially communicated with one another. The reflux pump is communicated with the rectifying tower. The method includes (1), delivering to-be-separated mixtures into the rectifying tower from the middle of the rectifying tower, separating the to-be-separated mixtures under the conditions of the pressures ranging from -0.01 MPa to 1.0 MPa, the tower top temperatures ranging from 90 DEG C to 160 DEG C and the tower bottom temperatures ranging from 120 DEG C to 180 DEG C, extracting poly-methoxy dibutyl ether solution from a tower bottom and extracting mixture steam from a tower top; (2), allowing the mixture steam to flow into the condensation cooler from a material steam inlet, cooling the mixture steam at the temperatures ranging from 80 DEG C to 120 DEG C to obtain condensed liquid, then allowing the condensed liquid to flow into the reflux tank from a material liquid outlet, allowing a part of the condensed liquid to flow back into the rectifying tower to continue to be rectified and extracting portions which do not flow back to the rectifying tower from the system. The anti-blocking device and the method have the advantages that the problem of easiness in blocking equipment can be effectively solved, and the separation purity of the poly-methoxy dibutyl ether can be enhanced.

The invention provides a multi-effect coating and a preparation method therefor, and is characterized in that: the multi-effect coating comprises crosslinkable polyacrylate, polyurethane, melamine, red phosphorus, ammonium dihydrogen phosphate, propanetriol, ethylene glycol, ethylene glycol dibutyl ether, Na2O.nSiO2, TiO2 and water; 100 parts by weight of the crosslinkable polyacrylate correspond to 3-5 parts of polyurethane, 10-15 parts of melamine, 5-10 parts of red phosphorus, 5-15 parts of ammonium dihydrogen phosphate, 5-12 parts of propanetriol, 3-5 parts of ethylene glycol, 5-10 parts of ethylene glycol dibutyl ether, 5-10 parts of Na2O.nSiO2, 10-20 parts of TiO2 and 150-180 parts of water; the raw materials are added according to the ratio into deionized water with a proper temperature; and after thorough agitating, and a coating product of the invention is obtained. The multi-effect coating provided by the invention has sufficient frame-retardancy and sufficient flexibility and uniformity to ensure the overall performance such as safety, comfort and aesthetics of the coating surface.