公开(公告)号：US4530783A

公开(公告)日：1985-07-23

申请号：US356344

申请日：1982-03-09

申请人： Luigi Arcuri ,  Elvio Bertotti ,  Giancarlo Carignani ,  Aldo Cipriani ,  Aldo Donato ,  Giuseppe Grossi

发明人： Luigi Arcuri ,  Elvio Bertotti ,  Giancarlo Carignani ,  Aldo Cipriani ,  Aldo Donato ,  Giuseppe Grossi

IPC分类号： C08G63/00 ,  C08F299/00 ,  C08F299/04 ,  C08G63/52 ,  C08L67/00 ,  C08L67/06 ,  G21F9/00 ,  G21F9/16 ,  G21F9/30

CPC分类号： G21F9/167 ,  C08K3/00

摘要： A composition of matter suitable for solidifying radioactive wastes is formed of unsaturated polyester resins comprising a polyester (I) obtained polycondensing (a) maleic anhydride and/or maleic and/or fumaric acid, (b) isophthalic and/or terephthalic acid, (c) neopentylglycol, (d) optionally one or more conventional glycols, wherein the amount of (c) is at least 50% by moles with respect to (c)+(d); another polyester (II) obtained polycondensing (a) maleic anhydride and/or maleic and/or fumaric acid, (b) isopropylidene-bis-(phenylene-oxypropanol-2), (c) optionally one or more conventional glycols, wherein the amount of (b) is at least 50% by moles with respect to (b)+(c); an ethylenically unsaturated monomer (III) capable of copolymerizing with (I) and (II); inhibitors, initiators, accelerators, glass fibers and other conventional additives and fillers the weight ratio of component (I) to (II) being from 100:0 to 20:80.

摘要翻译： 适用于固化放射性废物的物质组合物由不饱和聚酯树脂形成，所述不饱和聚酯树脂包含获得的缩聚（a）马来酸酐和/或马来酸和/或富马酸的聚酯（I），（b）间苯二甲酸和/或对苯二甲酸，（c ）新戊二醇，（d）任选的一种或多种常规二醇，其中（c）的量相对于（c）+（d）为至少50摩尔％; 获得缩聚（a）马来酸酐和/或马来酸和/或富马酸的另一种聚酯（II），（b）异亚丙基 - 双 - （亚苯基 - 氧基丙醇-2），（c）任选的一种或多种常规二醇，其中 （b）相对于（b）+（c）为至少50摩尔％; 能够与（I）和（II）共聚的烯属不饱和单体（III）; 抑制剂，引发剂，促进剂，玻璃纤维和其它常规添加剂和填料，组分（I）与（II）的重量比为100:0至20:80。

公开(公告)号：US5853653A

公开(公告)日：1998-12-29

申请号：US826785

申请日：1997-04-07

申请人： Aldo Donato ,  Carlo Alberto Nannetti ,  Alberto Ortona ,  Elisabetta Borsella ,  Sabina Botti ,  Sergio Casadio ,  Gianni D'Alessandro ,  Antonio Alessandro Licciulli ,  Stefano Martelli ,  Amedeo Masci

发明人： Aldo Donato ,  Carlo Alberto Nannetti ,  Alberto Ortona ,  Elisabetta Borsella ,  Sabina Botti ,  Sergio Casadio ,  Gianni D'Alessandro ,  Antonio Alessandro Licciulli ,  Stefano Martelli ,  Amedeo Masci

IPC分类号： C04B35/571 ,  C04B35/80

CPC分类号： C04B35/571 ,  C04B35/806 ,  Y10S977/779 ,  Y10S977/847 ,  Y10S977/891 ,  Y10S977/892 ,  Y10S977/897 ,  Y10S977/90 ,  Y10S977/961

摘要： Ceramic matrix composites (CMC) of high density, preferably of the type SiC/SiC, are provided by a production process based on the infiltration of ceramic fiber cloths with a polymeric precursor solution containing, as fillers, inert powders having size much lower than the mean distance among the ceramic fibers which are used as basic material for the manufacturing of CMC, typically a nanometric granulometry. Such step is followed by the steps of hardening the cloths, pyrolysis of the polymer and repeated thickenings until the desired density is reached. A possible alternative process comprises a brief (

摘要翻译： 高密度，优选SiC / SiC类型的陶瓷基质复合材料（CMC）是通过基于陶瓷纤维布渗透的制备方法提供的，该聚合物前体溶液含有作为填料的惰性粉末，其尺寸比 用作制造CMC的基本材料的陶瓷纤维之间的平均距离，通常是纳米粒度测定法。 这样的步骤之后是将织物硬化，聚合物热分解并重复加厚直到达到所需密度的步骤。 可能的替代方法包括对来自气相（CVI）的SiC从前体和用于沉积碳化硅的典型操作参数进行简单（<24小时）处理，随后重复增稠。