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1.发明公开
公开(公告)号：EP0357176A2
公开(公告)日：1990-03-07
申请号：EP89304258.0
申请日：1989-04-27
CPC分类号： C04B35/65 , C04B35/571 , C04B35/58 , C04B35/58014 , C04B35/58028 , C04B35/58042 , C04B35/589 , C04B35/591 , C04B35/62295 , C04B35/645 , Y10S264/11
摘要： A process for the production of high-performance ceramics and ceramic precursors is disclosed which comprises reacting an organometallic precursor with a reactant in a supercritical fluid and exposing the organometallic product to a ceramic material. A critical temperature (or pressure) is required to produce the supercritical fluid which is the maximum temperature (or pressure) at which a gas or vapor may be liquified by the application of a critical pressure (or temperature).
Nitrogen-containing ceramics such as nitrides, oxynitrides and carbonnitrides, and carbide ceramics are produced by reacting precursors such as alkyl halosilanes and dialkyl silanes in the presence of a supercritical fluid such as nitrogen, hydrogen, ammonia and mixtures thereof for the nitrogen-containing ceramics and in the presence of hydrocarbons, hydrogen or mixtures thereof for the carbide ceramics. The high performance ceramics produced find particular application in the automobile industry.摘要翻译： 公开了一种用于生产高性能陶瓷和陶瓷前体的方法，其包括使有机金属前体与超临界流体中的反应物反应并将有机金属产物暴露于陶瓷材料。 需要临界温度（或压力）以产生超临界流体，超临界流体是通过施加临界压力（或温度）使气体或蒸汽液化的最高温度（或压力）。 通过使诸如烷基卤代硅烷和二烷基硅烷的前体在氮，氢，氨等超临界流体及其混合物的存在下使含氮陶瓷反应，制备氮化物，氮氧化物和碳氮化物等含氮陶瓷，以及碳化物陶瓷。 并且在碳氢化合物，氢气或其混合物的存在下，用于碳化物陶瓷。 制造的高性能陶瓷在汽车工业中得到了应用。
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2.发明公开
公开(公告)号：EP0220238A1
公开(公告)日：1987-05-06
申请号：EP86902721.0
申请日：1986-04-14
CPC分类号： B29C44/445 , B29K2023/06 , B29K2025/00 , B29K2105/24 , Y10S264/11 , Y10S264/18
摘要： Des particules pré-expansées de résines thermoplastiques synthétiques expansibles (26) telles que des particules de résine thermoplastique expansée légèrement reticulée (26) sont exposées à un agent porogène gazeux tel que l'air ou du diclorodifluorométhane qui est un nonsolvant pour la résine, afin de provoquer la diffusion de l'agent porogène dans les particules et de leur permettre d'être à nouveau expansibles lors du chauffage. Les particules (26), après addition de l'agent porogène, sont alors introduites dans un empreinte de moule (23) chauffable de manière à la remplir imparfaitement et un gaz chauffé tel que de l'air chauffé est injecté généralement dans la partie centrale de l'empreinte du moule (23) au moyen d'une sonde rétractible (42) pour permettre un nouveau moussage des particules et leur fusion en un produit unitaire. Lors du retrait de la sonde (42), au moins une partie importante des surfaces (25) de l'empreinte du moule est chauffée pour obtenir un produit de faible densité ayant une surface lisse. Ce procédé permet de courtes durées de cycle.
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公开(公告)号：EP0357176B1
公开(公告)日：1994-07-06
申请号：EP89304258.0
申请日：1989-04-27
CPC分类号： C04B35/65 , C04B35/571 , C04B35/58 , C04B35/58014 , C04B35/58028 , C04B35/58042 , C04B35/589 , C04B35/591 , C04B35/62295 , C04B35/645 , Y10S264/11
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公开(公告)号：EP0357176A3
公开(公告)日：1991-01-30
申请号：EP89304258.0
申请日：1989-04-27
CPC分类号： C04B35/65 , C04B35/571 , C04B35/58 , C04B35/58014 , C04B35/58028 , C04B35/58042 , C04B35/589 , C04B35/591 , C04B35/62295 , C04B35/645 , Y10S264/11
摘要： A process for the production of high-performance ceramics and ceramic precursors is disclosed which comprises reacting an organometallic precursor with a reactant in a supercritical fluid and exposing the organometallic product to a ceramic material. A critical temperature (or pressure) is required to produce the supercritical fluid which is the maximum temperature (or pressure) at which a gas or vapor may be liquified by the application of a critical pressure (or temperature). Nitrogen-containing ceramics such as nitrides, oxynitrides and carbonnitrides, and carbide ceramics are produced by reacting precursors such as alkyl halosilanes and dialkyl silanes in the presence of a supercritical fluid such as nitrogen, hydrogen, ammonia and mixtures thereof for the nitrogen-containing ceramics and in the presence of hydrocarbons, hydrogen or mixtures thereof for the carbide ceramics. The high performance ceramics produced find particular application in the automobile industry.
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5.发明公开
公开(公告)号：EP0220238A4
公开(公告)日：1988-07-29
申请号：EP86902721
申请日：1986-04-14
申请人： DOW CHEMICAL CO
IPC分类号： B29C44/00 , B29C20060101 , B29C67/00 , B29C67/20 , B65G53/66 , C08J20060101 , C08J9/00 , C08J9/18 , C08J9/22 , C08L25/16 , B29C67/22
CPC分类号： B29C44/445 , B29K2023/06 , B29K2025/00 , B29K2105/24 , Y10S264/11 , Y10S264/18
摘要： Prefoamed expandable synthetic thermoplastic resins particles (26) such as lightly cross-linked foamed thermoplastic resin particles (26) are exposed to a gaseous expanding agent such as air or dichlorodifluoromethane which is a nonsolvent for the resin to cause expanding agent to diffuse into the particles and enable them to be further expandable upon heating. The particles (26) with the added expanding agent are then introduced into a heatable mold cavity (23) to loosely fill the mold cavity (23) and a heated gas such as heated air is injected generally into the central portion of the mold cavity (23) by means of a retractable probe (42) to further foam the particles and coalesce them into a unitary product. Upon withdrawal of the probe (42) at least a major portion of the mold cavity surfaces (25) are heated to produce a low density product having a smooth surface. Rapid cycle times are achieved with the process.
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