18 results about "Silicon alkoxide" patented technology

The invention belongs to the technical field of organic silicon synthesis, and particularly relates to low-ring-content silicone oil and a preparation method thereof, and the silicone oil comprises the following components in percentage by mass: 92-97% of DMC, 0.2-0.8% of crown ether, 0.5-2% of a phosphazene alkali silicon alkoxide catalyst, 0.4-2% of a phosphosilyl ester neutralizer and 0.35-3.5% of divinyl tetramethyl disiloxane. The novel phosphazene alkali silicon alkoxide catalyst and the phosphoric acid silicon ester neutralizer are adopted, so that the'back-biting 'cyclization phenomenon is greatly restrained in the polymerization process, and the reaction conversion rate and efficiency are improved; the Fe3O4-beta-cyclodextrin composite material is selected as an adsorbent of a ring body, so that the content of cyclosiloxane is reduced, the magnetic recovery rate is high, the thermal stability is high, and the biological safety is better; the volatile component content of the prepared low-ring-content silicone oil is less than 0.2% (150 DEG C / 3h), the ring content (D3-D10) is less than 200ppm, and the ring content meets the requirements of electronics, food and medical levels.

The invention also provides a briquette comprising:(i) a particulate material; and(ii) a binder, the binder comprising (a) at least partially saponified polyvinyl alcohol and (b) an alkali metal alkyl siliconate or polyalkylsilicic acid; wherein the particulate material is selected from a carbonaceous material, metal, metal ore, mineral waste or a mixture thereof.

A production method including: a step of forming, on a substrate layer containing a polypropylene resin or a polyester resin, a metal oxide layer by a vacuum film forming process; a step of applying a gas barrier coating layer-forming composition on the metal oxide layer to form a coating film; a step of preheating the coating film by infrared radiation; and a step of heating and thereby curing the coating film preheated by infrared radiation in an atmosphere at 50 to 120° C. to form a gas barrier coating layer, in which the gas barrier coating layer-forming composition contains at least one selected from the group consisting of an alkyl silicon alkoxide and its hydrolysate, and a water-soluble polymer.

The present invention addresses the main problem of providing a coating agent composition for forming a coating layer that has high transparency, is extremely hydrophilic, and has an antifouling function and an antifogging function even in a low-temperature atmosphere. The present invention also addresses the problem of providing a method for producing the coating agent composition. Further, the present invention addresses the main problem of providing a product having a coating layer in which the coating agent is used.　Provided as means for solving said problems are: a production method for a coating agent composition, the method comprising (A) a step for causing a polymer obtained through polymerization of a silicon alkoxide to coexist with cerium hydroxide and / or cerium oxide to obtain an intermediate composition, and (B) a step for causing the intermediate composition obtained in said step (A) to coexist with an acidic colloidal silica to obtain a coating agent composition; and a coating agent composition comprising a polymer obtained through polymerization of a silicon alkoxide, cerium hydroxide and / or cerium oxide, and an acidic colloidal silica.

A gas barrier laminate for liquid packaging according to the present disclosure comprises a substrate layer, an inorganic layer, and an overcoat layer, in this order. The substrate layer contains a polyethylene, and the overcoat layer is obtained using an overcoat layer forming composition that contains a silicon compound and a water-soluble polymer. The silicon compound includes at least one of a silicon alkoxide, a hydrolysate thereof, and a polycondensate thereof, and the mass ratio of the silicon compound (in terms of SiO2) to the water-soluble polymer is 1.5-3.0.

Polymer derived ceramic (PDC) materials, compositions and methods of making high capacity, long cycle, long life battery anodes to improve the performance of batteries of all types, including but not limited to coin cell batteries, electric vehicle (EV) batteries, hybrid electric vehicle (HEV) batteries, plug-in hybrid electric vehicle (PHEV) batteries, battery electric vehicle (BEV) batteries, lithium cobalt (LCO) batteries, lithium iron (LFP) batteries; and lithium-ion (Li) batteries, and lead acid batteries. Silicon is incorporated in the PDC material at a molecular level when reacting a polymer derived ceramic precursor and a silicon hydride constituent or a silicon alkoxide constituent to form a PDC composition useful as a powdered battery anode material. A predetermined amount of divinylbenzene is added as a crosslinker and a modifier to increase free carbon content. The resulting battery anode materials increase the specific capacity of a battery measured in milliampere-hours per gram (mAh / g) and increase the life cycle of a battery while minimizing distortion and stress of the anode structure.

This invention provides a method for producing silica nanocapsules without using reagents that are difficult to handle. [Solution] The present invention provides a method for producing silica nanocapsules containing a water-soluble compound, comprising hydrolyzing and dehydrating a silicon alkoxide in an aqueous solution containing a water-soluble compound to produce silica, wherein the water-soluble compound has a pyranone ring and a hydroxyl group. Furthermore, the present invention provides a method for producing porous silica nanocapsules, further comprising dispersing the water-soluble compound-encapsulated silica nanocapsules obtained by the above method in water or an aqueous solution to elute the water-soluble compound from the water-soluble compound-encapsulated silica nanocapsules.

The invention relates to a method for protecting a substrate against fire and / or heat, using a fire-resistant material. The material comprises an assembly of man-made vitreous silicate mineral fibers impregnated with an aluminosilicate composition prepared by a sol-gel process comprising mixing a silicon alkoxide and an aluminum alkoxide in an aqueous solvent. This material is particularly effective for protecting heat-sensitive substrates against heat and / or fires with a temperature higher than 1800° C.

To provide a method for efficiently producing insulating coated magnetic powder having an insulating coating with high coverage and thinness. [Solution] A method for producing insulating coated magnetic powder, comprising: a raw material preparation step of preparing a raw material solution containing magnetic powder, a nonionic dispersant, water, and alcohol; an ammonia addition step of adding ammonia to the raw material solution; and a film formation step of adding silicon alkoxide to the ammonia-containing raw material solution and then performing a stirring treatment to form an insulating film on the surface of the magnetic powder particles, wherein the nonionic dispersant is an ether compound having an ether bond and a number average molecular weight of 250,000 to 3,000,000, an ester compound having an ester bond and a number average molecular weight of 1,000 to 150,000, or a cyclic amide compound having a cyclic amide structure and a number average molecular weight of 8,000 to 1,000,000.

The invention relates to a fire-resistant material comprising an assembly of vitreous siliceous artificial mineral fibers impregnated with an aluminosilicate-based composition prepared by a sol-gel process comprising a mixture of silicon alkoxide and aluminum alkoxide in an aqueous solvent. This material is particularly effective for protecting heat-sensitive substrates against heat and / or fires with temperatures exceeding 1800 °C.

A polysilsesquioxane liquid precursor includes a copolymer of a trifunctional silicon alkoxide and a difunctional silicon alkoxide, and residual silanol group fraction fSiOH in the copolymer is 0.02 to 0.3. A method for producing a polysilsesquioxane liquid precursor includes subjecting a trifunctional silicon alkoxide and a difunctional silicon alkoxide to a hydrolysis reaction and a polycondensation reaction in an aqueous solution without using an organic solvent in the presence of an acid catalyst, with aging during the hydrolysis reaction and the polycondensation reaction.

Embodiments of the invention include articles incorporating fibrous fragments of mats of silica fibers and methods for producing such articles. The fiber mats may be formed via electrospinning of a sol gel produced with a silicon alkoxide reagent, such as tetraethyl ortho silicate, alcohol solvent, and an acid catalyst.

The present application relates to the technical field of inorganic non-metallic material preparation, and particularly relates to a system and method for continuously preparing high-purity synthetic quartz sand based on gas jet strengthening sol-gel method, which comprises the following steps: mixing an alcohol solution of silicon alkoxide with a catalyst-containing aqueous solution to prepare a mixed reaction solution; introducing inert gas as working fluid into a jet reactor to form a gas jet, and using negative pressure to inject the mixed reaction solution into the jet reactor to prepare homogeneous silica sol; and performing continuous gelation and aging, solid-liquid separation, washing, drying and sintering treatment on the silica sol to prepare high-purity synthetic quartz sand; the inert gas is used as the jet, the negative pressure generated by the inert gas is used to inject the mixed reaction solution into the negative pressure area, and the inert gas and the liquid form a huge gas-liquid interface and turbulent vortex, which can effectively disperse the liquid micro-cluster, realize rapid homogenization at the molecular scale, inhibit the agglomeration of siloxane oligomers caused by too fast local reaction, and eliminate the concentration gradient problem causing the agglomeration.

The invention belongs to the technical field of modified polymer materials, and discloses modified rosin resin for UV (ultraviolet) ink as well as a preparation method and application of the modified rosin resin. The preparation method comprises the following steps: (1) carrying out chain extension reaction on hydroxyl silicone oil, an epoxy silane monomer and a silane monomer containing unsaturated double bonds in the presence of a silicon alkoxide catalyst to obtain modified silicone oil containing epoxy groups and unsaturated double bonds; and (2) adding the disproportionated rosin resin and a catalyst into a solvent, dissolving and uniformly mixing, heating to 80-120 DEG C under a protective atmosphere, then adding the modified silicone oil containing epoxy groups and unsaturated double bonds, epoxy resin and a trimellitic anhydride curing agent, carrying out a heat preservation reaction, and after the reaction is completed, carrying out reduced pressure distillation to remove the solvent, so as to obtain the modified rosin resin. The disproportionated rosin resin is modified by adopting a specific silicone oil component, so that the flexibility, glossiness and weather resistance of the disproportionated rosin resin can be remarkably improved. And the specific epoxy resin and the curing agent are adopted for synergistic cross-linking modification, so that good adhesiveness is ensured.

The invention discloses a hot-line work self-curing insulating material railway line coating method, and relates to the field of material science. When the insulating material is prepared, DOPO reacts with p-benzoquinone and then reacts with acryloyl chloride to prepare modified DOPO; the preparation method comprises the following steps: reacting cerium oxide with dopamine hydrochloride, and then reacting with vinyl trimethoxy silane to prepare modified cerium oxide; the preparation method comprises the following steps: enabling tetramethyl cyclotetrasiloxane, dihydroxy polysiloxane and tetramethyl ammonium hydroxide silicon alkoxide to react to prepare polysiloxane; the preparation method comprises the following steps: uniformly mixing polysiloxane, the modified 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, the modified cerium oxide, fumed silica and a Karstedt catalyst, and grinding the mixture by a three-roller grinding machine, so as to obtain the high-temperature-resistant polysiloxane composite material. The prepared insulating material is coated by a robot when in use. According to the hot-line work self-curing insulating material railway line coating method, room temperature curing can be achieved, and the flame retardant property and the anti-aging property are excellent.

The objective is to provide a method for manufacturing quartz glass that can transmit 222nm light while suppressing the transmission of 252nm light. [Solution] A method for producing quartz glass, comprising at least a preparation step of preparing tin-containing dry silica gel by drying tin-containing silica gel obtained by mixing silicon alkoxide, ethanol, tin(II) chloride, an alkali source, an acid source, and water; a first heat treatment step of heat-treating the glass raw material containing the tin-containing dry silica gel under a vacuum of 10 Pa or less at a temperature of 900°C to 1900°C; and a second heat treatment step of heat-treating the glass raw material heat-treated in the first heat treatment step in a nitrogen atmosphere at a temperature of 1400°C to 1900°C.

The application discloses a production device and manufacturing process of high-purity sand-like silicon dioxide, and belongs to the technical field of new material synthesis. The production device comprises a jacketed reaction container, a raw material pipe and a liquid inlet pipe are arranged at the top of the reaction container, a distillation head is arranged between the raw material pipe and the liquid inlet pipe, an air inlet pipe and a discharge port are arranged at the bottom of the reaction container, a stirring device is arranged in the reaction container, the stirring device extends from the bottom to the top of the reaction container and is connected with a motor. The manufacturing process comprises the following steps: inputting water and a silicon alkoxide raw material from the top of the reaction container and stirring; stopping stirring after heating and performing a gelation reaction; inputting a mixed gas atmosphere from the bottom of the reaction container and removing a solvent; stirring and dispersing the material, reversely stirring, discharging the material and performing a calcination treatment. The application effectively inhibits drying cracking and the generation of organic carbon impurities through process integration and mixed gas atmosphere drying technology, the prepared silicon dioxide is high in purity, regular in sand shape, and high in process continuity and environmental protection, and has great industrial application value.