1104 results about "Alkoxide" patented technology

A method of improving surface flame resistance of a substrate is provided. A substrate is provided. An atmosphere pressure plasma process is performed on the surface of the substrate to form an inorganic film layer on the surface of the substrate, wherein a process gas of the atmosphere plasma process includes a flame resistance precursor, a carrier gas, and a plasma ignition gas. Particularly, the flame resistance precursor is selected from a siloxane compound, an inorganic alkoxide compound and a combination thereof. The siloxane compound has a formula of Si(OC_nH_2(n+1))₄, n=1˜5, and the inorganic alkoxide compound has a formula of A(OC_mH_2m+1)4, where A represents Sn, Ti, Zr, Ce and m=2.

Metal-oxide films for lithographic applications are provided. The films are formed from compositions comprising metal-oxide precursor compounds including metals and metalloids other than silicon. These films are easily produced and can be modified with a variety of ligands, including alkoxides, phenoxides, carboxylates, beta-diketones, and beta-ketoesters.

Liquid feed flame spray pyrolysis of solutions of a metal oxide precursor which is an alkoxide or C_1-6 carboxylate and at least one second metal oxide precursor and/or second metal compound dissolved in oxygenated solvent by combustion with oxygen lead to the formation of sub-micron mixed-metal oxide powders not accessible by other processes or by the pyrolysis of metal chlorides or nitrates. The powders have numerous uses in advanced materials applications including particulate solid state lasers, advanced ceramic materials, and as catalysts in organic synthesis and automobile exhaust systems.

A process for production of a polyethylene blend in situ comprising contacting ethylene and at least one alpha-olefin with a magnesium/titanium based catalyst system including a partially activated precursor and a cocatalyst in each of two fluidized bed reactors connected in series, one of the provisos being that the precursor is formed by contacting an alkylaluminum halide with a solid reaction product prepared from a magnesium alkoxide, a titanium tetraalkoxide, and a solubility enhancing agent.

A method of forming (and apparatus for forming) a tantalum oxide layer on a substrate, particularly a semiconductor substrate or substrate assembly, using a vapor deposition process and a tantalum precursor compound that includes alkoxide ligands, for example.

A method of fabricating hafnium oxide and/or zirconium oxide films is provided. The methods include providing a mixture of Hf and/or Zr alkoxide dissolved, emulsified or suspended in a liquid; vaporizing at least the alkoxide and depositing the vaporized component at a temperature of greater than 400° C. The resultant film is dense, microcrystalline and is capable of self-passivation when treated in a hydrogen plasma or forming gas anneal.

This invention provides a catalys conponent and catalyst. Said catalyst comprises titanium, magnesium and at least three electron donor compounds a, b and c, in which is selected from mono-aliphatic-carboxylate or mono-aromatic-carboxylate compounds, b is selected from a special diatomic alkoxide compound, and c is selected from binary binary-aliphatic-carboxylate or binary-aromatic-carboxylate or b is ether compound. Advantages: high polymerization activity and stereospecificity when used for olefin polymerization, in particular for propylene polymerization, wide molecular weight distribution of obtained polymer and good shape of polymer granulars.

Metal silicates or phosphates are deposited on a heated substrate by the reaction of vapors of alkoxysilanols or alkylphosphates along with reactive metal amides, alkyls or alkoxides. For example, vapors of tris-(ter-butoxy)silanol react with vapors of tetrakis(ethylmethylamido)hafnium to deposit hafnium silicate on surfaces heated to 300° C. The product film has a very uniform stoichiometry throughout the reactor. Similarly, vapors of diisopropylphosphate react with vapors of lithium bis(ethyldimethylsilyl)amide to deposit lithium phosphate films on substrates heated to 250° C. supplying the vapors in alternating pulse produces these same compositions with a very uniform distribution of thickness and excellent step coverage.

The invention provides a method for preparing a titanium dioxide nano belt, belonging to the nano material technical field. The prior methods for preparing the titanium dioxide nano belt comprise the hydro-thermal method and the combination method of the sol-gel method and the hydro-thermal method. The prior electrostatic spinning method is applied to the preparation of nano fibers. The invention comprises three steps that: 1. a spinning solution is prepared; the mixture of polymethylmethacrylate and vinylpyrrolidone is used as a macromolecule template, and the mixture of chloroform and N,N-dimethylformamide is used as a solvent; 2. a titanium alkoxide/ macromolecule template compound nano belt is prepared; the electrostatic spinning method is used, and the technical parameters are as follows: the voltage is between 15 and 25kV and the curing distance is between 15 and 30cm; 3. a TiO2 nano belt is prepared; the heat treatment method is used, and the technical parameters are as follows: the rate of temperature rise is between 0.5 and 2 DEG C/min and the heat preservation time at the temperature of between 500 and 900 DEG C is between 10 and 15h; for the TiO2 nano belt prepared, the width is between 5 and 15mu m, the thickness is between 30 and 60nm and the length is more than 200mu m; the TiO2 nano belt comprises a pure phase anatase type TiO2 nano belt and a pure phase rutile type TiO2 nano belt.

Disclosed are processes of making solutions of alkali alkoxides in their corresponding alcohols using an electrolytic process. In one embodiment, sodium methoxide in methanol is made from methanol and aqueous sodium hydroxide solution, where the aqueous sodium hydroxide solution is present in the anolyte compartment and a solution of sodium methoxide in methanol is present in the catholyte compartment, the two compartments are separated by a ceramic membrane that selectively transports sodium ions under the influence of an electric potential, and wherein the composition of the solution of sodium methoxide in methanol in the catholyte compartment of the electrolytic cell comprises between at least about 2% by weight sodium methoxide and at most about 20% by weight sodium methoxide.

Nanowires are disclosed which comprise transition metal oxides. The transition metal oxides may include oxides of group II, group III, group IV and lanthanide metals. Also disclosed are methods for making nanowires which comprise injecting decomposition agents into a solution comprising solvents and metallic alkoxide or metallic salt precursors.

Metal and/or silicon oxides are produced by hydrolysis of alkoxide precursors in the presence of either an acid catalyst or a base catalyst in a supercritical fluid solution. The solubility of the acid catalysts in the supercritical fluid can be increased by complexing the catalyst with a Lewis base that is soluble in the supercritical fluid. The solubility of the base catalysts in the supercritical fluid can be increased by complexing the catalyst with a Lewis acid that is soluble in the supercritical fluid. The solubility of water in the solution is increased by the interaction with the acid or base catalyst.

The present invention provides a process for producing a block copolymer in high productivity, by anionic polymerization by use of a lithium initiator, and also to provide the block copolymer and a hydrogenated product thereof, the block copolymer having a conjugated diene block portion with a high vinyl bond content and a vinyl aromatic block portion with a narrow molecular weight distribution and exhibiting a narrow molecular weight distribution and high strength. A conjugated diene monomer and a vinyl aromatic monomer by use of a lithium initiator, are block copolymerized by making a tertiary amine compound and (2) sodium alkoxide coexist, wherein (2)/(1) (a molar ratio)=from 0.01 or more to less than 0.1.

The present disclosure relates to the production method of inorganic nanofibres through electrostatic spinning of solution, which comprises alkoxide of metal or of semi-metal or of non-metal dissolved in a solvent system on basis of alcohol. The solution is stabilised by chelating agent, which prevents hydrolysis of alkoxide, and after homogenisation it is mixed with solution of poly(vinylpyrrolidone) in alcohol, after then the resultant solution is brought into electrostatic field, in which the electrostatic spinning is running continually, the result of which is production of organic-inorganic nanofibres, which are after then calcinated outside the spinning device in the air atmosphere at the temperature from 500° C. to 1300° C.

The invention discloses an ambient pressure drying method for rapidly preparing SiO2 aerogel. Part of an alcohol solvent is replaced with a solvent with low surface tension; silica-alkoxides, the non-replaced alcohol solvent, an acidic catalyst, a basic catalyst and the solvent with the low surface tension are prepared into sol according to a certain proportion, after alcogel containing the solvent with the low surface tension is formed, ageing and surface modification processes are carried out, and then, ambient pressure drying is directly carried out, so that the complex solvent exchanging step is omitted, and the SiO2 aerogel is prepared within 30h. By using the method, not only are the defects such as high equipment investment, low efficiency, high cost of the traditional supercritical drying process overcome, but also the problems of long period, high using cost for solvent exchanging and the like in the traditional ambient pressure drying process are solved, and the prepared SiO2 aerogel has the characteristics of low surface density, large specific area, large pore volume and the like.

High-quality differential-shrinkage polyester combined filament yarn having good color tone and being free from fluffing can be made from a polyester polymer produced by using a catalyst comprising (I) a mixture consisting of a Ti compound component composed of one or more members selected from among titanium alkoxides of the general formula (I) and products of reaction of these alkoxides with carboxylic acids of the general formula (II) or anhydrides thereof and a P compound component consisting of a compound of the general formula (III) and/or (2) a product obtained by reacting a Ti compound component composed of one or more members selected from among titanium alkoxides of the general formula (I) and products of reaction of these alkoxides with carboxylic acids of the general formula (II) or anhydrides thereof with a P compound component consisting of a compound of the general formula (IV).

A polyester multifilament yarn having an individual filament thickness of 0.3 to 2.0 dtex, a total thickness of 90 dtex or less and a silk factor of 22 or more, can be obtained from a polyester polymer produced by polycondensing an aromatic dicarboxylate ester in the presence of a catalyst which comprises a mixture of a Ti compound component (A) comprising at least one member selected from titanium alkoxides and reaction products of the titanium alkoxides with carboxylic acids or anhydrides thereof, with a specific P compound component (B), and/or a reaction product of the Ti compound component (A) for the mixture with a specific P compound component (D), the resultant yarn having a good color tone (a low b* value) and an excellent weaving or knitting property and a good dyeing processability.