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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 12. Отображено 12.
09-05-2023 дата публикации

Amino bonding aid as well as preparation method and application thereof

Номер: CN116082592A
Принадлежит:

The invention provides an amino bonding aid as well as a preparation method and application thereof. The adhesive aid is a macromolecule with 1-4 amino groups, which is prepared by polymerizing HDI (hexamethylene diisocyanate) biuret with a monoamino silane coupling agent and then reacting with diethylenetriamine and micromolecular diamine. The bonding aid is applied to a polyurethane or epoxy adhesive, participates in a chain extension reaction of polyurethane and epoxy and reacts into a polyurethane chain segment or an epoxy chain segment through a large bonding group, and due to the fact that the bonding aid contains multi-amino molecules, the bonding aid can play a cross-linking role, and the body strength of a final product is improved; due to a large number of siloxane structures and ureido groups, the bonding strength and low-temperature initial adhesion performance of the adhesive to glass, stainless steel, anodic aluminum oxide and other base materials are improved, the construction ...

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01-08-2023 дата публикации

Flame-retardant vinyl silicone oil, flame-retardant organic silicon pouring sealant and preparation method

Номер: CN116515115A
Принадлежит:

The invention provides flame-retardant vinyl silicone oil, which is mainly prepared from the following components in parts by mass: 160 to 350 parts of vinyl polymer and 80 to 150 parts of 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide through reaction. The invention also provides a preparation method of the flame-retardant vinyl silicone oil. The invention also provides a flame-retardant organic silicon pouring sealant using the flame-retardant vinyl silicone oil and a preparation method of the flame-retardant organic silicon pouring sealant. Wherein the flame-retardant organic silicon pouring sealant is formed by uniformly mixing a component A and a component B, and the component A and the component B both comprise hollow glass beads coated with light filler phenolic resin graphene. According to the flame-retardant vinyl silicone oil, the flame-retardant property of vinyl silicone oil is greatly improved, so that the dosage of the flame retardant is reduced, the temperature resistance ...

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04-04-2023 дата публикации

MS floor paving adhesive

Номер: CN115895555A
Принадлежит:

The invention provides an MS floor paving adhesive which comprises the following components in parts by weight: silane modified polyether resin; a plasticizer; a reinforcing filler; grafting hollow glass beads; coating the hollow glass beads; a filling type flame retardant; a water removal agent; a coupling agent; and a catalyst. The surfaces of the hollow glass beads are coated with the high-thermal-conductivity material, a thermal bridge is established in the adhesive, the thermal conductivity of the prepared adhesive is improved, and the heating effect of a wood floor laid through a full-adhesion method when floor heating is used is effectively improved. The halogen-free flame-retardant intermediate is grafted on the surfaces of the hollow glass beads, so that the consumption of the flame retardant of the prepared adhesive is reduced by more than 25%, and the adhesive has excellent flame retardance.

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09-05-2023 дата публикации

Low-density nylon and preparation method thereof

Номер: CN116082835A
Принадлежит:

The invention provides low-density nylon and a preparation method thereof. The preparation method comprises the following steps: a) dissolving hydroxy acid small molecules in a solvent, removing water, cooling, adding trifunctional isocyanate, reacting for 1-2 hours, adding a catalyst under the protection of inert gas and stirring, and continuously reacting for 3-5 hours to obtain a reinforcing aid; and b) uniformly mixing PA66, talcum powder, glass beads, the reinforcing aid obtained in the step a) and a silane coupling agent, and extruding by using a double-screw extruder at 275-295 DEG C under the condition of vacuumizing to-0.08 MPa to-0.05 MPa to obtain the low-density nylon. Compared with the prior art, the preparation method provided by the invention has the advantages that specific raw materials are selected, particularly, a specific reinforcing aid is introduced, and specific preparation processes, conditions and parameters are matched, so that relatively good overall interaction ...

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07-04-2023 дата публикации

Low-density butyl rubber and preparation method thereof

Номер: CN115926332A
Принадлежит:

The invention provides low-density butyl rubber and a preparation method thereof. The preparation method comprises the following steps: a) mixing amorphous polyolefin, an initiator and a vinyl silane coupling agent, and kneading to obtain a compatilizer; and b) heating a kneading machine to 80-150 DEG C, adding butyl rubber and the compatilizer obtained in the step a) into the kneading machine, kneading for 5-10 minutes under the pressure lower than-0.095 MPa, adding calcium carbonate and a reinforcing agent, continuously kneading for 10-15 minutes, and finally adding glass beads, and continuously kneading for 10-15 minutes to obtain the low-density butyl rubber. Compared with the prior art, the preparation method provided by the invention selects specific raw materials, particularly introduces a specific compatilizer, and cooperates with specific preparation processes, conditions and parameters to realize overall better interaction, and the obtained low-density butyl rubber has higher ...

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23-05-2023 дата публикации

Hydroxyl bonding auxiliary agent, preparation method thereof and sealant

Номер: CN116143981A
Принадлежит:

The invention provides a hydroxyl bonding aid and a preparation method thereof. The bonding aid is a macromolecule with 1-4 hydroxyl groups, carbamate groups, ureido groups and silicon-oxygen carbon bonds, which is mainly prepared by sequentially polymerizing HDI biuret with a monoamino silane coupling agent and a diamino silane coupling agent and then reacting with trimethylolpropane and micromolecular dihydric alcohol. The invention also provides a polyurethane sealant using the hydroxyl bonding aid, the hydroxyl bonding aid participates in a chain extension reaction of polyurethane, and polyhydroxy molecules in the hydroxyl bonding aid can play a cross-linking role, so that the body strength of the sealant is improved; the bonding auxiliary agent contains a large number of carbamate groups, siloxane structures and a large number of ureido groups, so that the bonding strength and low-temperature initial adhesion performance of the polyurethane sealant are improved, the construction period ...

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27-06-2023 дата публикации

Preparation method and application of titanium dioxide coated hollow glass beads

Номер: CN116333514A
Принадлежит:

The invention relates to a preparation method and application of titanium dioxide coated hollow glass microbeads, and belongs to the technical field of hollow glass microbeads, 0.1-1 part by weight of a titanate coupling agent is added into 80-90 parts by weight of an organic solvent, stirring is performed for 1-3 hours, and a titanium solution is obtained; adding 10-20 parts by weight of hollow glass beads into the titanium solution prepared in the step S1, and stirring for 1-3 hours to obtain a glass bead titanium solution; s2, evaporating the organic solvent in the glass bead titanium solution prepared in the step S2 through a low-temperature reduced pressure distillation method, and drying by using a freeze dryer or a vacuum oven to obtain a pre-coated material; and S3, sieving the pre-coated material prepared in the step S3, calcining at 400-600 DEG C for 2-6 hours, and cooling to obtain the titanium dioxide coated hollow glass bead product. The process is simple, large-scale production ...

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04-04-2023 дата публикации

Low-density anti-aging fiber and preparation method thereof

Номер: CN115896973A
Принадлежит:

The invention provides a low-density anti-aging fiber and a preparation method thereof. The preparation method comprises the following steps: a) mixing high-molecular-weight dihydric alcohol and low-molecular-weight polyhydric alcohol, adding isocyanate to carry out a first reaction, adding a first solvent to dissolve, cooling, adding a mixture of a chain extender, a terminator and a second solvent, and sequentially carrying out a second reaction, a third reaction and curing to obtain a reaction mixture; b) adding an anti-aging agent and glass beads into the reaction mixture, uniformly stirring, and spinning to obtain low-density anti-aging fibers; and the anti-aging agent is trimethylolpropane triglycidyl ether. According to the preparation method provided by the invention, specific raw materials are selected, particularly, the polyepoxy-containing micromolecular anti-aging agent and the glass beads are introduced, and a specific preparation process is matched, so that relatively good ...

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25-04-2023 дата публикации

Water-based paint and preparation method thereof

Номер: CN116004058A
Принадлежит:

The invention relates to the technical field of coating production, in particular to a water-based coating and a preparation method thereof. The water-based paint comprises the following components in parts by weight: 150 parts of styrene-acrylic emulsion; 1-10 parts of a preservative; 2-8 parts of a thickening agent; 1-5 parts of a dispersant; 5-20 parts of reinforced fibers; 3-9 parts of a coalescing agent; 2-5 parts of an anti-freezing agent; 100 to 150 parts of modified glass beads; 120 to 180 parts of water; the modified glass beads are obtained by modifying glass beads with a treating agent; the treating agent is prepared from raw materials including a component a, a catalyst and a solvent, the component a comprises polyester glycol, a water-based chain extender, diisocyanate and a monoamino silane coupling agent. According to the water-based paint, the modified glass beads can realize better combination of the glass beads and a matrix, the mechanical property of the water-based paint ...

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11-04-2023 дата публикации

Low-density silicone rubber and preparation method thereof

Номер: CN115948055A
Принадлежит:

The invention provides low-density silicone rubber and a preparation method thereof. The preparation method comprises the following steps: a) mixing a solvent, trifunctional isocyanate and small molecules containing vinyl and hydroxyl, carrying out a first reaction, adding a catalyst, and carrying out a second reaction to obtain a reinforcing auxiliary agent; and b) uniformly mixing vinyl silicone rubber, methyl silicone oil, calcium carbonate, the reinforcing aid obtained in the step a) and a silane coupling agent, meshing for 10-15 minutes by adopting a vacuum kneading machine under the conditions that the temperature is 100-120 DEG C and the vacuum pressure is lower than-0.095 MPa, continuing to add glass beads for meshing for 5-10 minutes, and finally adding a vulcanizing agent on an open mill for open milling for 5-10 minutes to obtain the low-density silicone rubber. Compared with the prior art, the preparation method provided by the invention has the advantages that specific raw ...

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30-05-2023 дата публикации

Bonding aid, preparation method thereof and structural adhesive

Номер: CN116178651A
Принадлежит:

The invention provides a bonding aid, a preparation method thereof and a structural adhesive. The bonding aid is prepared by the following steps: sequentially polymerizing HDI biuret with a monoamino silane coupling agent and a diamino silane coupling agent, and then reacting with bifunctional group micromolecules and diethanol amine, the silane coupling agent comprises the following components in parts by mole: 100 parts of HDI (hexamethylene diisocyanate) biuret, 20-50 parts of a diamino silane coupling agent, 100-200 parts of a monoamino silane coupling agent, 20-150 parts of bifunctional group micromolecules and 20-150 parts of diethanol amine. The bonding aid has macromolecules with 1-4 hydroxyls, a large number of ureido groups and a large number of silicon-oxygen-carbon bonds, and when the bonding aid is applied to a polyurethane structural adhesive, the bonding aid participates in a polyurethane chain extension reaction to improve the body strength of the structural adhesive; and ...

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28-04-2023 дата публикации

Wall brick and preparation method thereof

Номер: CN116023100A
Принадлежит:

The invention relates to the technical field of building materials, in particular to a wall brick and a preparation method thereof. The wall brick is prepared from the following raw materials in parts by weight: 70-100 parts of water; 30 to 50 parts of latex; 10 to 50 parts of cement; 30 to 50 parts of lime; 10 to 30 parts of gypsum; 10 to 30 parts of gravel; 10 to 30 parts of attapulgite; 20 to 80 parts of hollow glass beads; 0.3 to 0.8 part of PP (Propene Polymer) fiber; 60 to 100 parts of crude MDI (diphenylmethane diisocyanate); and 1-10 parts of a catalyst. The hollow glass beads are added, foaming is not needed, micron-sized cavities can be evenly and densely distributed in the wall brick, and the prepared wall brick is excellent in compressive strength. In addition, the hollow glass beads are added into the wall brick, so that the weight of the wall brick is reduced, and the thermal insulation performance is improved. The hollow glass beads are matched with other components for combined ...

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