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    Aromatic dinitro and diamino intermediates
    82.
    发明授权
    Aromatic dinitro and diamino intermediates 失效
    芳香二硝基和二氨基中间体

    公开(公告)号：US5710334A

    公开(公告)日：1998-01-20

    申请号：US453073

    申请日：1995-05-26

    Applicant: Yuko Ishihara ,  Mitsunori Matsuo ,  Keizaburo Yamaguchi ,  Akihiro Yamaguchi

    Inventor： Yuko Ishihara ,  Mitsunori Matsuo ,  Keizaburo Yamaguchi ,  Akihiro Yamaguchi

    IPC: C07C201/12 ,  C07C205/45 ,  C07C221/00 ,  C07C225/22 ,  C08G73/10 ,  C08G73/12 ,  C08J5/18 ,  C08L79/08 ,  C07C217/84 ,  C07C217/90

    CPC classification number: C08G73/10 ,  C08G73/1007 ,  C08G73/1014 ,  C08G73/1017 ,  C08G73/1067 ,  Y10T428/31504 ,  Y10T428/31721

    Abstract: This invention relates to a novel thermoplastic and amorphous polyimide which is readily soluble in organic solvent, a novel aromatic diamino compound used for the polyimide, a preparation process thereof, a polyimide-based resin composition comprising the thermoplastic polyimide and a fibrous reinforcement, a process for preparing the resin composition, an injection molded article of the resin composition, a polyimide-based composite obtained by molding the above soluble and thermoplastic polyimide in combination with a fibrous reinforcement, and a fibrous reinforcement having a surface modified with the above polyimide. The polyimide comprise a requisite structural unit having one or more recurring structural units of the formula: ##STR1## wherein m and n are individually an integer of 0 or 1, and R is ##STR2## The polyimide of the invention is essentially amorphous, excellent in melt flow stability in the decreased temperature as compared with conventionally known polyimide and has greatly improved processability. The polyimide of the invention obtained by using a novel aromatic diamino compound as a monomer can control various properties such as melt flow ability and solubility in solvents by side chains and not by principal chain of polyimide. Thus, excellent melt flow property and solubility in solvents can be obtained while maintaining high heat resistance and adhesive property which are derived from benzophenone structure of the diamino compound of the the invention.

    Abstract translation: 本发明涉及易溶于有机溶剂的新型热塑性和无定形聚酰亚胺，用于聚酰亚胺的新型芳族二氨基化合物及其制备方法，包含热塑性聚酰亚胺和纤维增强剂的聚酰亚胺基树脂组合物， 用于制备树脂组合物的树脂组合物的注塑制品，通过将上述可溶性和热塑性聚酰亚胺与纤维增强剂组合成型而获得的聚酰亚胺类复合材料和具有用上述聚酰亚胺改性的表面的纤维增强剂。 聚酰亚胺包含必需的结构单元，其具有一个或多个下式的重复结构单元：其中m和n分别为0或1的整数，且R为“无定形”，优异的 与传统已知的聚酰亚胺相比在降低的温度下的熔体流动稳定性，并且具有极大的改进的加工性能。 通过使用新颖的芳族二氨基化合物作为单体获得的本发明的聚酰亚胺可以通过侧链而不是聚酰亚胺的主链来控制各种性能如熔体流动性和在溶剂中的溶解度。 因此，在保持由本发明的二氨基化合物的二苯甲酮结构得到的高耐热性和粘合性的同时，可以获得优异的熔体流动性和溶剂中的溶解性。

    Synthesis of bis(2,2-dinitropropyl)acetal (BDNPA)
    84.
    发明授权
    Synthesis of bis(2,2-dinitropropyl)acetal (BDNPA) 失效
    双（2,2-二硝基丙基）缩醛（BDNPA）的合成

    公开(公告)号：US5648556A

    公开(公告)日：1997-07-15

    申请号：US339138

    申请日：1994-11-14

    Applicant: R. Scott Hamilton ,  Robert B. Wardle

    Inventor： R. Scott Hamilton ,  Robert B. Wardle

    IPC: C07C201/12 ,  C07B61/00 ,  C07C205/29 ,  C07C41/50 ,  C07C43/30

    CPC classification number: C07C201/12

    Abstract: A nonsolvent process of synthesizing bis(2,2-dinitropropyl)acetal (BDNPA) is disclosed. In the process, 2,2-dinitropropanol (DNPOH) is reacted at low temperature with an acetaldehyde source in the presence of an acid catalyst, such as a Lewis acid catalyst or protic acid catalyst. To inhibit by product formation, the reaction temperature is maintained from about -30.degree. C. to 30.degree. C. Upon completion of the reaction, the reaction solution is quenched with water and washed with an aqueous hydroxide solution. The hydroxide concentration should be sufficient to neutralize any acid formed during the quenching step and to solubilize unreacted 2,2-dinitropropanol as well as other aqueous soluble byproducts in the reaction solution. The BDNPA product is extracted with methyl tert-butyl ether (MTBE) or equivalent solvent. The organic solvent is evaporated to yield usable BDNPA product. The resulting yield is at least 50% based on the starting quantity of 2,2-dinitropropanol.

    Abstract translation: 公开了合成双（2,2-二硝基丙基）缩醛（BDNPA）的非溶剂方法。 在此过程中，在酸催化剂如路易斯酸催化剂或质子酸催化剂存在下，将2,2-二硝基丙醇（DNPOH）在低温下与乙醛源反应。 为了抑制产物形成，将反应温度保持在约-30℃至30℃。反应完成后，将反应溶液用水淬灭并用氢氧化钠水溶液洗涤。 氢氧化物浓度应足以中和淬灭步骤中形成的任何酸，并将未反应的2,2-二硝基丙醇以及其他水溶性副产物溶解在反应溶液中。 用甲基叔丁基醚（MTBE）或等效溶剂萃取BDNPA产物。 将有机溶剂蒸发，得到可用的BDNPA产物。 基于2,2-二硝基丙醇的起始量，所得产率为至少50％。

    Process for the preparation of chlorine-substituted olefins
    87.
    发明授权
    Process for the preparation of chlorine-substituted olefins 失效
    氯取代烯烃的制备方法

    公开(公告)号：US5569774A

    公开(公告)日：1996-10-29

    申请号：US307659

    申请日：1994-09-20

    Applicant: Bernd Schaefer ,  Irene Troetsch-Schaller

    Inventor： Bernd Schaefer ,  Irene Troetsch-Schaller

    IPC: C07B39/00 ,  C07C201/12 ,  C07C205/56 ,  C07D303/32 ,  C07D303/48 ,  C07D303/38

    CPC classification number: C07D303/32 ,  C07B39/00 ,  C07C201/12 ,  C07C201/16 ,  C07D303/48

    Abstract: Chlorine-substituted olefins I ##STR1## (R.sup.1 =organic radical; R.sup.2 =--CN, --CO--R.sup.3, --CO--S--R.sup.3, --CO--O--R.sup.3 --CO--N(R.sup.4,R.sup.5); R.sup.3 =organic radical; R.sup.4, R.sup.5 =H, organic radical)are prepared by reacting oxiranes II ##STR2## in the presence of a carboxamide (IIIa) or of a lactam (IIIb) in liquid phase with a chlorinating agent (IV). The products I are important intermediates for dyes, drugs and crop protection agents.

    Abstract translation: PCT No.PCT / EP93 / 00586 Sec。 371日期1994年9月20日 102（e）1994年9月20日PCT 1993年3月13日PCT公布。 公开号WO93 / 19034 日本1993年9月30日氯取代烯烃I（R1 =有机基团; R2 = -CN，-CO-R3，-CO-S-R3，-CO-O-R3-CO-N（R4， R5）; R3 =有机基团; R4，R5 = H，有机基团）是通过使环氧乙烷II II在甲酰胺（IIIa）或内酰胺（IIIb）的存在下与氯化剂 （四）。 产品我是染料，药物和作物保护剂的重要中间体。

    Cleaving arylethers
    89.
    发明授权
    Cleaving arylethers 失效
    劈牙

    公开(公告)号：US5463129A

    公开(公告)日：1995-10-31

    申请号：US173451

    申请日：1993-12-23

    Applicant: Zenon Lysenko ,  Richard G. Pews

    Inventor： Zenon Lysenko ,  Richard G. Pews

    IPC: C07C39/02 ,  C07C37/055 ,  C07C201/12 ,  C07C205/23 ,  C07C205/37 ,  C07C205/38 ,  C07C213/00 ,  C07C213/02 ,  C07C215/80 ,  C07C211/50

    CPC classification number: C07C201/12 ,  C07C213/02 ,  C07C213/10

    Abstract: The present invention relates to a method of cleaving arylethers such as arylethers represented by the formula: ##STR1## wherein R is hydrogen, C.sub.1 -C.sub.6 alkyl, cycloalkyl, phenyl, substituted phenyl or CH.dbd.CH.sub.2 ; each A is independently NO.sub.2, hydroxy, halo, or methoxy; n is an integer from 0 to 5; and x is 1 or 2, comprising contacting the arylether with an amide hydrohalide salt under conditions sufficient to cleave the ether group(s) of the arylether and form a phenol or substituted phenol. The present invention also relates to a method of preparing 4,6-diaminoresorcinol, which is a monomer used for making polybenzoxazoles (PBO).

    Abstract translation: 本发明涉及一种裂解芳基醚的方法，例如由下式表示的芳基醚：其中R是氢，C 1 -C 6烷基，环烷基，苯基，取代的苯基或CH = CH 2; 每个A独立地是NO 2，羟基，卤素或甲氧基; n为0〜5的整数， 和x是1或2，包括在足以裂解芳基醚的醚基并形成苯酚或取代的苯酚的条件下使芳基醚与酰胺氢卤酸盐接触。 本发明还涉及一种制备4,6-二氨基间苯二酚的方法，其是用于制备聚苯并恶唑（PBO）的单体。

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