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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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Применить Всего найдено 10. Отображено 10.
20-06-2013 дата публикации

POLYPROPYLENE MATERIAL WITH HIGH MELT STRENGTH AND PREPARATION PROCESS AND USE THEREOF

Номер: WO2013086757A1
Автор: YU, Haiou, YANG, Xiaoyun, WANG, Aidong, TAO, Siping, XIAO, Peng, XIA, Jianmeng, NING, Kaijun
Принадлежит:

Disclosed are a polypropylene material with a high melt strength, and a preparation process and the use thereof. The polypropylene material is prepared from 65-99.79 parts of polypropylene, 0.01-10 parts of an initiator, 0.1-10 parts of a multi-functional monomer, 0.1-5 parts of a free radical stabilizer and 0-10 parts of an inert processing aid. The free radical stabilizer is a lanthanide rare earth oxide, a carboxylate of a lanthanide rare earth element, a naphthenic acid complex of a lanthanide rare earth element or a dithiocarbamic acid rare earth compound. The lanthanide rare earth element does not include promethium. In the present invention, by controlling the proportion of polypropylene, initiator and multi-functional monomer, increasing the time for the grafting reaction, inhibiting the degradation of polypropylene using rare earth materials and prolonging the lifetime of the free radicals, polypropylene having a high melt strength, a long branched chain and stable performance ...

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Номер записи: 1
30-05-2023 дата публикации

Styrene compound, product as well as preparation method and application of styrene compound

Номер: CN116178851A
Автор: HUANG CHIGUANG, FENG NANNAN, FAN CONGCHENG, LI BIN, DU RONGHUA, FU JINFENG, YANG XIAOYUN, XIA JIANMENG
Принадлежит:

The invention relates to a styrene compound, a product as well as a preparation method and application of the styrene compound. The styrene compound comprises a styrene polymer, a butadiene toughening agent and a black-to-white laser marking agent. According to the invention, the styrene polymer is used as a base material, and a specific amount of black-to-white laser marking agent is added, so that a white mark can be formed in the base material through laser etching, and the surface layer of the base material has excellent scratch resistance.

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Номер записи: 2
27-02-2020 дата публикации

ANTI-WARPING HIGH-TEMPERATURE-RESISTANT REINFORCED POLYAMIDE COMPOSITION AND PREPARATION METHOD THEREFOR

Номер: WO2020038152A1
Автор: LIN, Jielong, YANG, Bo, DING, Zhengya, ZHANG, Chao, SUN, Gang, XIA, Jianmeng, HUANG, Hesheng
Принадлежит:

Disclosed is an anti-warping high-temperature-resistant reinforced polyamide composition, comprising the following components in percentages by weight: 13.58%‑82.98% of at least one semi-crystalline polyamide; 2%‑20% of at least one amorphous semi-aromatic polyamide; 0.01%‑5% of a metal salt compound; 15%-60% of a filler; and 0.01%‑12％ of a polyamide modifier. The polyamide composition is better than existing polyamide compositions containing metal salts and highly branched compounds in terms of mechanical properties and surface appearance, and has many improved physical properties and moldability, including improved surface appearance of mold parts.

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Номер записи: 3
23-05-2023 дата публикации

Composition capable of forming high-surface-hardness white mark through laser etching and preparation method and application thereof

Номер: CN116144130A
Автор: HUANG CHIGUANG, FENG NANNAN, FAN CONGCHENG, LI BIN, DU RONGHUA, FU JINFENG, YANG XIAOYUN, XIA JIANMENG
Принадлежит:

The invention relates to a composition capable of forming a high-surface-hardness white mark through laser etching and a preparation method and application of the composition. The composition capable of laser etching the white mark with high surface hardness comprises polymethyl methacrylate, a styrene-acrylonitrile copolymer, acrylate rubber and a black-white laser marking agent. After the composition capable of forming the high-surface-hardness white mark through laser etching is whitened through laser black, the obtained white mark has the same surface hardness as that of the composition before laser etching and shows excellent scratch resistance.

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Номер записи: 4
05-07-2012 дата публикации

FLAME RETARDANT MODIFIED POLYPROPYLENE COMPOSITE IMPROVED BY CERAMIC FIBRE AND PREPARATION PROCESS THEREOF

Номер: WO2012088743A1
Автор: YANG, Dingjifu, XIA, Jianmeng, TIAN, Jinli
Принадлежит:

Disclosed in the present invention are a flame retardant modified polypropylene composite improved by ceramic fibre and a preparation process thereof; the composite is composed by weight thus: 60 - 75 parts of a polypropylene resin, 15 - 30 parts of ceramic fibre, 5 - 10 parts of a fire retardant; and 3 - 10 parts of a processing aid. The flame retardant modified polypropylene composite improved by ceramic fibre provided by the present invention has good flame retardance, properties of high heat resistancy, high surface hardness, and at the same time has high internal surface rigidity etc., and has a flame retardant rating up to UL94 V-O and is able to meet the operating requirements for shells and the internal structure components of electrical articles. The process for preparing flame retardant improved polypropylene composite containing ceramic fibre of the present invention uses a twin-screw extrusion device, and has advantages such as a simple procedure, continuity, high production ...

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Номер записи: 5
26-05-2023 дата публикации

Composition capable of achieving light diffusion effect through laser marking and preparation method and application of composition

Номер: CN116162320A
Автор: HUANG CHIGUANG, FENG NANNAN, HUANG HESHENG, ZHAO BO, FAN CONGCHENG, LI BIN, DU RONGHUA, FU JINFENG, YANG XIAOYUN, XIA JIANMENG
Принадлежит:

The invention relates to a composition capable of achieving a light diffusion effect through laser marking and a preparation method and application of the composition. The composition capable of achieving the light diffusion effect through laser marking comprises a compound and a black-to-white laser marking agent. The polymethyl methacrylate and the acrylonitrile-styrene copolymer with specific content are compounded to serve as a base material, then a trace amount of the black-to-white laser marking agent is added to obtain the composition, the composition can be used for marking a specific pattern with a light diffusion effect through laser, and then the diffusion effect is achieved.

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Номер записи: 6
22-08-2023 дата публикации

Spherical carrier for propylene polymerization, preparation method of spherical carrier and propylene polymerization catalyst prepared from spherical carrier

Номер: CN116622012A
Автор: CHEN WEI, CHEN PINGXU, XIA JIANMENG, CAO MIN
Принадлежит:

The invention discloses a spherical carrier for propylene polymerization, a preparation method thereof and a propylene polymerization catalyst prepared from the spherical carrier. The spherical carrier for propylene polymerization is prepared from raw materials including magnesium halide and organic alcohol, and has the following particle parameters: D50 is 30-80 [mu] m, D10gt; 10 [mu] m, PSDlt; 1.8). A propylene polymerization catalyst prepared by using the spherical carrier for propylene polymerization has smaller particle size and narrow particle size distribution, the content of fine powder of PP particles can be reduced when the catalyst is applied to a ring pipe body process, and meanwhile, the catalyst is also suitable for producing anti-impact PP particles with higher rubber content than a particle type catalyst by a gas phase process; meanwhile, the catalytic activity and hydrogen regulation sensitivity of the propylene polymerization catalyst are further improved. In addition, ...

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Номер записи: 7
26-05-2023 дата публикации

Transparent compound, product with diffusion effect and preparation method and application of transparent compound

Номер: CN116162322A
Автор: HUANG CHIGUANG, ZHAO BO, FENG NANNAN, FAN CONGCHENG, LI BIN, DU RONGHUA, FU JINFENG, YANG XIAOYUN, XIA JIANMENG
Принадлежит:

The invention relates to a transparent compound, a product with a diffusion effect and a preparation method and application of the transparent compound. The transparent compound comprises a transparent polymer, a foaming agent, a laser absorbent and the like. Trace foaming agents and laser absorbents are introduced into the transparent compound, the laser absorbents emit heat after absorbing laser energy, the foaming agents are triggered to be decomposed, a plurality of tiny bubbles are formed in the transparent compound, and due to the fact that the bubbles have no blocking effect on light rays, light energy cannot be attenuated, and the light rays fully refract when passing through the tiny bubbles, the light rays are fully refracted. Therefore, the light diffusion effect is achieved.

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Номер записи: 8
29-08-2023 дата публикации

Low-carbon alkane dehydrogenation catalyst as well as preparation method and application thereof

Номер: CN116651434A
Автор: CHEN WEI, PAN TAO, CHEN PINGXU, ZHANG CHUANHUI, XIA JIANMENG, YANG CHUNLIANG, CAO MIN
Принадлежит:

The invention provides a low-carbon alkane dehydrogenation catalyst as well as a preparation method and application thereof. The low-carbon alkane dehydrogenation catalyst provided by the invention is a Cr-series catalyst with a new design configuration, the loaded transition metal La is introduced into an aluminum oxide skeleton, La-O sites in the skeleton are formed, the La element with a larger size occupying lattice sites can inhibit high-temperature migration of Al < 3 + > in a bulk phase, and the special electronic property of La-O bonds is beneficial to activation of H < + >, so that the low-carbon alkane dehydrogenation catalyst has a good catalytic activity. The dehydrogenation reaction process is promoted, and the selectivity and the thermal stability are improved; meanwhile, silane residues are introduced to the surface of the alumina carrier, redundant Al-OH on the surface of the alumina carrier is eliminated, and more stable and hydrophobic Si-O-Si is formed, so that the alumina ...

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Номер записи: 9
08-08-2023 дата публикации

Polyethylene glycol terephthalate mixture as well as preparation method and application thereof

Номер: CN116554650A
Автор: LU LIBO, HUANG HESHENG, XIA JIANMENG, YAO HUAXIA, YIN NIANWEI, WU CHANGBO, FU XUEJUN, DING CHAO
Принадлежит:

The invention discloses a polyethylene glycol terephthalate mixture as well as a preparation method and application thereof. The polyethylene glycol terephthalate mixture comprises the following components in parts by weight: 45-86 parts of polyethylene glycol terephthalate resin, 0-10 parts of a toughening agent, 10-50 parts of a reinforcing agent, 0.7-10 parts of a nucleating agent and 0-3 parts of a processing aid. The nucleating agent comprises a composition of long-chain linear saturated lignite acid salt, talcum powder and polyethylene. The formability of the polyethylene glycol terephthalate mixture is further improved, the forming period is greatly shortened, high mechanical strength, toughness and thermal deformation temperature can be kept, the application range is further expanded, the polyethylene glycol terephthalate mixture is not limited by colors, and the polyethylene glycol terephthalate mixture can be applied to all-color products.

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Номер записи: 10