-
公开(公告)号：US20090044603A1
公开(公告)日：2009-02-19
申请号：US12045217
申请日：2008-03-10
申请人： Radislav Alexandrovich Potyrailo , Scott Martell Boyette , Glenn Alfred Johnson , William Guy Morris , Ronald James Wroczynski , Andrew Michael Leach , Peter Miller , Caibin Xiao
发明人： Radislav Alexandrovich Potyrailo , Scott Martell Boyette , Glenn Alfred Johnson , William Guy Morris , Ronald James Wroczynski , Andrew Michael Leach , Peter Miller , Caibin Xiao
IPC分类号： G01N33/00
CPC分类号： B01L3/5027 , B01L2200/025 , B01L2200/141 , B01L2200/143 , B01L2300/021 , B01L2300/0816 , B01L2300/0864 , B01L2300/168 , G01N21/03 , G01N2021/0325 , G01N2021/0346 , G01N2021/0382
摘要： An article includes a substrate assembly for use in a detector system. The substrate assembly includes a substrate; a sample reception structure secured to the substrate; a test window extending through the substrate; and a fluid channel defined by a surface of the substrate and extending from the sample reception structure to the test window.
摘要翻译： 一种物品包括用于检测器系统的基底组件。 基板组件包括基板; 固定到所述基板的样品接收结构; 延伸穿过衬底的测试窗口; 以及由衬底的表面限定并从样品接收结构延伸到测试窗口的流体通道。
-
公开(公告)号：US06639043B1
公开(公告)日：2003-10-28
申请号：US10180581
申请日：2002-06-27
IPC分类号： C08G6400
CPC分类号： C08G64/307
摘要： The present invention relates to a synthetic method comprising contacting at least one diaryl carbonate with one or more dihydroxy aromatic compounds in the presence of a transesterification catalyst under melt polymerization conditions to afford a product polycarbonate. The transesterifcation catalysts used according to the method of the present invention are azonaphthalene sulfonates in combination with tetraalkylammonium or tetraalkylphosphonium compounds which serve as co-catalysts. The transesterification catalysts employed according to the method of the present invention provide polycarbonates having reduced levels of Fries rearrangement product relative to conventionally employed catalysts such as sodium hydroxide in combination with tetramethylammonium hydroxide co-catalyst.
摘要翻译： 本发明涉及一种合成方法，其包括在熔融聚合条件下在酯基转移催化剂存在下使至少一种碳酸二芳基酯与一种或多种二羟基芳族化合物接触，得到产物聚碳酸酯。 根据本发明方法使用的酯交换催化剂是与用作助催化剂的四烷基铵或四烷基鏻化合物组合的氮杂萘磺酸盐。 根据本发明的方法使用的酯交换催化剂提供了相对于常规使用的催化剂如氢氧化钠与四甲基氢氧化铵助催化剂的组合，具有降低的Fries重排产物水平的聚碳酸酯。
-
公开(公告)号：US06608164B2
公开(公告)日：2003-08-19
申请号：US10007229
申请日：2001-10-25
IPC分类号： C08G6400
CPC分类号： C08G64/307
摘要： The present invention relates to a synthetic method in which one or more diaryl carbonates is reacted with one or more dihydroxy aromatic compounds in the presence of a transesterification catalyst under melt polymerization conditions to afford a product polycarbonate. The transesterifcation catalysts used according to the method of the present invention are alkali metal salts and alkaline earth metal salts of heterocyclic diols in combination with tetraalkylammonium or tetraalkylphosphonium compounds which serve as co-catalysts. The furan diol derivative dimethyl 3,4-dihydroxy-2,5-furandiacarboxylate disodium salt, structure IV, was shown to possess excellent activity as a transesterifcation catalyst for the preparation of polycarbonate under melt polymerization conditions. The catalysts employed according to the method of the present invention provide polycarbonates having substantial molecular weight (Mn˜8000-10000 daltons) and reduced levels of Fries rearrangement product relative to conventionally prepared melt polycarbonate having a similar molecular weight.
-
公开(公告)号：US06569986B1
公开(公告)日：2003-05-27
申请号：US10007228
申请日：2001-10-25
IPC分类号： C08G6400
CPC分类号： C08G64/307
摘要： The present invention relates to a synthetic method comprising contacting at least one diaryl carbonate with one or more dihydroxy aromatic compounds in the presence of a transesterification catalyst under melt polymerization conditions to afford a product polycarbonate. The transesterifcation catalysts used according to the method of the present invention are alkali metal salts and alkaline earth metal salts of organic polyacids in combination with tetraalkyl ammonium or tetraalkyl phosphonium compounds which serve as co-catalysts. The transesterification catalysts are derived from polyacids containing both CO2H groups and SO3H groups and from polyacids containing exclusively CO2H groups or exclusively SO3H groups. The catalysts employed according to the method of the present invention provide polycarbonates having reduced levels of Fries rearrangement product relative to conventionally employed catalysts such as sodium hydroxide.
摘要翻译： 本发明涉及一种合成方法，其包括在熔融聚合条件下在酯基转移催化剂存在下使至少一种碳酸二芳基酯与一种或多种二羟基芳族化合物接触，得到产物聚碳酸酯。 根据本发明方法使用的酯交换催化剂是作为助催化剂的四烷基铵或四烷基鏻化合物的有机多酸的碱金属盐和碱土金属盐。 酯交换催化剂衍生自含有CO 2 H基团和SO 3 H基团的多酸和仅含有CO 2 H基团或仅含有SO 3 H基团的多酸。 根据本发明的方法使用的催化剂提供了相对于常规使用的催化剂如氢氧化钠具有降低的Fries重排产物含量的聚碳酸酯。
-
公开(公告)号：US06308142B1
公开(公告)日：2001-10-23
申请号：US09250052
申请日：1999-02-12
申请人： Kim Choate , Angela R. Neff , Paul Cletus Raymond III , Patrick A. Rodgers , Ronald James Wroczynski
发明人： Kim Choate , Angela R. Neff , Paul Cletus Raymond III , Patrick A. Rodgers , Ronald James Wroczynski
IPC分类号： G06F10114
摘要： A method for determining flame retardance of polymer compositions includes subjecting a plurality of specimens of a polymer composition to a flame test and performing a statistical analysis of the data obtained. The statistical analysis includes determining the probability of at least one possible outcome of the flame test. The probability of possible outcomes provides a measure of the flame retardance of the polymer composition. A preferred flame test is the UL-94 flame test.
摘要翻译： 用于测定聚合物组合物的阻燃性的方法包括使聚合物组合物的多个样品进行火焰测试并对获得的数据进行统计分析。 统计分析包括确定火焰测试的至少一个可能结果的概率。 可能结果的可能性提供了聚合物组合物的阻燃性的量度。 优选的火焰测试是UL-94火焰测试。
-
-
-
-
搜索结果
15 条记录 (耗时 0.035 秒)
