485 results about "Bis(trimethylsilyl)amine" patented technology

A method of manufacturing a semiconductor device having a low-k dielectric layer is provided. An embodiment comprises forming a dielectric layer on a substrate, wherein the layer comprises a pore generating material dispersed in an uncured matrix. A second step comprises forming pores in the uncured matrix by irradiating the layer with radiation having a first wavelength. After pore forming, a third step comprises cross-linking the dielectric by irradiating it at a second wavelength, the second being less than the first. In an embodiment, the irradiating wavelengths comprise ultra-violet radiation. Embodiments may further include repairing processing damage wherein the damage includes dangling bonds or silanol formation. The repairing includes annealing in a carbon-containing ambient such as C₂H₄, C₃H₆, or hexamethyldisilazane (HMDS).

The invention provides adducts comprising a carbon nanotube with covalently attached silane moieties, and methods of making such adducts. Examples of silane moieties include trimethoxysilane; hexaphenyldisilane; silylphosphine; 1,1,1,3,5,5,5-heptamethyltrisiloxane; polydimethylsiloxane, poly(N-bromobenzene-1,3-disulfonamide); N,N,N′,N′-tetrabromobenzene-1,3-disulfonamide; hexamethyldisilazane (HMDS); chlorotrimethylsilane (TMCS); trichloromethylsilane (TCMS); an alkyl(alkylamino)silane; a tri(alkoxy)silane; tert-butyldimethylsilane; monochloroaminosilane; dichloroaminosilane; trichloroaminosilane; and dimethylaminosilane.

Disclosed is a technique for preventing a water-repellent protective film formed on a resist film from peeling off during immersion exposure. A resist film is formed on the front surface of a substrate and then the peripheral edge portion of the resist film is removed. Before forming a water-repellent protective film onto the resist film, an adhesion-improving fluid, preferably hexamethyldisilazane gas, for improving the adhesion of the water-repellent protective film, is supplied to the region from which the resist film is removed.

A novel polycrystalline stoichiometric fine SiC fiber substantially free of impurities is produced using a novel pre-ceramic polymer. The pre-ceramic polymer is prepared by reacting a mixture of chlorodisilane, boron trichloride, and a vinyl chlorodisilane with an excess of hexamethyldisilazane to form the pre-ceramic polymer resin, which may then be melt-spun, cured, pyrolyzed and heat-treated to obtain the finished SiC fiber. The manufacturing process for the production of the fine SiC ceramic fiber allows for flexibility with respect to cross-linking, in that low-cost thermal treatments may replace more complex methods, while obtaining fibers with improved materials properties as compared to currently available SiC fibers.

The invention discloses a method for synthesizing dihydroxyl-terminated polysiloxane. The method synthesizes the target dihydroxyl-terminated polysiloxane compound by using unsaturated epoxy compound, tetramethyldisiloxane, methylaminoethanol and octamethylcyclotetrasiloxane as starting materials and by hydrosilylation, epoxy-opening and equilibrium polymerization. The hexamethyldisilazane or trimethylchlorosilane are not needed as a hydroxyl protector, so the production cost is reduced; and hydroxyl protection and deprotection are avoided in a preparation process, so reaction steps are reduced, the total reaction time for synthesizing the final product is short and the production efficiency is increased.

The invention discloses ceramic flame-retardant and fireproof silicone rubber and a preparation method thereof. The silicone rubber contains the following components in parts by weight: 100 parts of raw silicone rubber, 10-50 parts of white carbon black, 10-100 parts of aluminum hydroxide, 10-50 parts of low-melting-point glass powder, 10-100 parts of sericite powder, 1-20 parts of hydroxyl silicone oil, 1-20 parts of hexamethyl disilazane, 0.1-3 parts of a platinum compound and 0.1-5 parts of a vulcanizing agent. The silicone rubber is good in flame retardance, excellent in mechanical property, safe and environmentally friendly, has good mechanical strength and insulating property after being ablated, is capable of preventing burnt objects from being damaged and keeping a circuit completefor a long time and can play a good fireproof role.

The invention relates to a preparation method of hydrophobic silicon dioxide aerogel, and relates to a silicon dioxide aerogel and a preparation method thereof. The method includes steps of taking tetraethoxysilane and methyl triethoxy silane as a common precursor, ethanol as a solvent, water as hydrolysis agent, and hydrolysis as catalyst, ethanol added with carbon fluorinated surfactant as aging fluid; performing supercritical drying process, and obtaining the block-shaped silicon dioxide aerogel with good hydrophobic rate. The preparation method is simple in technique, and able to make samples hydrophobic instead of introducing hexamethyldisilazane and other combustible finishing agent with peculiar smell; the prepared product is low in density, good in hydrophobic property, stable in thermal performance, and excellent in heat insulation performance.

The invention discloses a preparation method of submicron silica powder and relates to the technical field of preparation of submicron materials. The preparation method comprises the following specific steps: placing raw materials in a ball mill and grinding the raw materials; screening the ground materials; adding the materials into a sand mill; adding water or an organic solvent used as a dispersion medium, simultaneously adding one or more of dispersing agents including a silane coupling agent, a titanate coupling agent and hexamethyl-disilazane and performing wet grinding; deironing the ground slurry through a slurry deironing device; carrying out filter pressing on the deironed slurry to obtain a filter cake, wherein clear liquid obtained by filter pressing can be continuously used as a dispersion medium. The preparation method is simple in process and high in efficiency; a product is low in manufacturing cost, high in yield, short in production period, free of agglomeration, controllable in size and suitable for industrial production.

A pressure-sensitive adhesive tape is provided with a pressure-sensitive adhesive layer and a water-repellent layer formed on the pressure-sensitive adhesive surface of the pressure-sensitive adhesive layer. The water-repellent layer is formed by using a water repellent exhibiting the water repellency in which a contact angle with water is greater than or equal to 140°. The water-repellent layer may have hydrophobic fine particles. The hydrophobic fine particle may contain a hydrophobic fine silica compound. The hydrophobic fine silica compound may be modified with hexamethyldisilazane.

The invention relates to the technical field of high polymer material and particularly relates to a preparation method of a super-hydrophobic fiber. The preparation method of the super-hydrophobic fiber provided by the invention comprises the following steps: (a) constructing a nano-micro structure, namely coating the surface of polymeric fiber with a coating, thereby obtaining the polymeric fiber with surface subjected to functionalization, wherein the coating is dopamine, gamma-glycidyl ether oxygen propyl trimethoxy silane, tetraethoxy-silicane or aminopropyl triethoxysilane; and (b) performing surface modification, namely modifying the polymeric fiber with surface subjected to functionalization by use of a material with low surface energy, thereby obtaining the super-hydrophobic polymeric fiber, wherein the material with low surface energy is alkyltrichlorosilane or hexamethyl bisilazane. A contact angle between a fiber membrane manufactured by the fiber prepared by the method and water can be 168 degrees, the rolling angles of water drops on the fiber membrane are 4.5 degrees, and the fiber membrane has excellent affinity with ordinary organic solvents such as hexane and gasoline.

Radiation-curing coating systems which contain a silanized silica, where the silane is hexamethyldisilazane, 3-methacryloxypropyltrialkoxysilane and/or glycidyloxypropyltrialkoxysilane as the silanizing agent. The radiation-curing coating systems can be used for coating derived timber boards, solid wood, wood veneers, parquet, decorative papers, decorative films, thermoplastics and thermosetting plastics, mineral and polymeric glasses, metals (for example aluminium, high-grade steel, phosphated, chromated and galvanized steel sheets, copper), lacquered surfaces, printing inks and leather.

The invention discloses a preparation method of polyurethane rubber / silicone gross rubber. The method includes the following steps: 1, fully mixing 100 parts of white carbon black and 20 parts of hexamethyl-disilazane in a mixing mill, baking the mixture an oven at 80 DEG C to a neutral state, and placing for 24 h; 2, adding the mixture with 200 parts of methyl vinyl silicone rubber and 10 parts of diphenyl silanediol in a vacuum kneading machine, and kneading the mixture into gross rubber; and 3, respectively milling the silicone rubber gross rubber and polyurethane rubber in a double roller for 2 min, and then evenly mixing silicon rubber gross rubber and polyurethane rubber in a weight ratio of 3:2, adding a vulcanizing agent, conducting thin-filming and discharging. According to the preparation method of the polyurethane rubber / silicone gross rubber provided by the invention compound, white carbon black is added to methyl vinyl silicone rubber for mixing, and then subjected to co-mixing with polyurethane; without the addition of the compatibilizer, the curing agent can realize the vulcanization; and the prepared gross rubber has good mechanical properties.

The invention relates to a preparation method for a SiBNC fiber/SiBNC composite material. The preparation method for the SiBNC fiber/SiBNC composite material comprises the following steps: (1) preparing a precursor polymer by polymerizing a micromolecular monomer boron trichloride, methyl hydrogen dichlorosilane and hexamethyldisilazane; (2) pretreating the surface of the SiBNC fiber and performing pre-crosslinking with the precursor polymer; (3) performing thermoforming to obtain a prefabricated product; (4) performing infusible treatment on the prefabricated product; and (5) performing ceramic treatment at high temperature. The SiBNC fiber/SiBNC composite material prepared by the method has high density, uniform components, low porosity, high-temperature resistance and excellent mechanical performance.

The invention relates to a synthesis method of a tris(trimethylsilyl) phosphate, which comprises the following steps: reacting hexamethyldisilazane with a phosphate for 2 to 5 hours at the temperature of 80 to 160 DEG C so as to form a tris(trimethylsilyl) phosphate and ammonia; then carrying out rectification and purification on the obtained crude product so as to obtain a fine product of the tris(trimethylsilyl) phosphate. The method has the advantages of simple operation, easy-taking raw material and simple post-processing, is suitable for industrial production, and can synthesize high quality product.

The invention relates to a method for synthesizing hexamethyldisilazane. The hexamethyldisilazane is synthesized by a mixed solvent method through one-step ammoniation reaction, the hydrolysis side reaction of the hexamethyldisilazane can be inhibited by adding hexamethyldisiloxane into a reaction system, and reaction yield is improved. By the method, the yield is high, reaction time is short, energy consumption during rectification is low, the production cost of the hexamethyldisilazane is reduced, and the large advantage of industrialization is achieved.

The invention belongs to the technical field of a high polymer material and a preparation method thereof, and especially relates to an instant-sealing silicone sealant and a preparation method thereof, and the instant-sealing silicone sealant comprises the following components by weight: 28 to 32% of hydroxyl-terminated polydimethylsiloxane(20000cp), 20 to 24% of hydroxyl-terminated polydimethylsiloxane(3000cp), 35 to 40% of nano calcium carbonate, 4.0 to 6.0% of methyl-tri-(butanone-oxime)silane, 1.0 to 2.0% of vinyl-tri-(butanone-oxime)silane, 3.0 to 5.0% of fumed silica, 0.03 to 0.06% of hexamethyl-disilazane, 0.03 to 0.06% of dibutyltin dilaurate and 0.03 to 0.06% of N-(beta-aminoethyl)-gamma-aminopropyltrimethoxysilane. The instant-sealing silicone sealant has the advantages of being fast to cure, instant to seal, environmental-friendly, conserving and non-solvent, and has the characteristics of excellent thixotropy, aging resistance, ultraviolet resistance and the like. The instant-sealing silicone sealant can be widely applied to instant sealing of railway vehicles and automobile mechanical parts, quick bonding and sealing of lamp materials, and the like.

A method for modifying the surface of a solid material and a surface-modified solid material are provided, where an excellent adhesion strength between the surface of the solid material and any of coating films made of various UV-curing resins or the like can be obtained. In other words, it is attained by carrying out a silicatizing flame treatment on the surface of the solid material by wholly or partially blowing a flame of a fuel gas containing a specific silicon-containing compound having a flash point of 0 to 100° C. and a boiling point of 105 to 250° C., such as hexamethyldisilazane, vinyltrimethoxysilane, trifuloropropyl trimethoxysilane, 3-chloropropyl trimethoxysilane and the like.