Fluorinated aromatic diamine
    2.
    发明授权
    Fluorinated aromatic diamine 失效
    氟化芳族二胺

    公开(公告)号:US4203922A

    公开(公告)日:1980-05-20

    申请号:US841085

    申请日:1977-10-11

    摘要: This invention relates to a novel aromatic diamine and more particularly to the use of said diamine for the preparation of thermally stable high-molecular weight polymers including, for example, polyamides, polyamideimides, polyimides, and the like. This diamine is obtained by reacting a stoichometric amount of a disodium salt of 2,2-bis(4-hydroxyphenyl) hexafluoropropane with 4-chloronitrobenzene to obtain an intermediate, 2,2-bis[4-(4-nitrophenoxy)phenyl] hexafluoropropane, which is reduced to the corresponding 2,2-bis[4-(4-aminophenoxy)phenyl] hexafluoropropane.

    摘要翻译: 本发明涉及一种新的芳族二胺,更具体地说涉及所述二胺用于制备热稳定的高分子量聚合物(包括例如聚酰胺,聚酰胺酰亚胺,聚酰亚胺等)的用途。 该二胺是通过使2,2-二(4-羟基苯基)六氟丙烷的二钠盐与4-氯硝基苯反应得到中间体2,2-双[4-(4-硝基苯氧基)苯基]六氟丙烷 ,其还原成相应的2,2-双[4-(4-氨基苯氧基)苯基]六氟丙烷。

    Perfluoroisopropylidene dianhydride and polyimides prepared therefrom
    3.
    发明授权
    Perfluoroisopropylidene dianhydride and polyimides prepared therefrom 失效
    全氟异亚丙基二酐和由其制备的聚酰亚胺

    公开(公告)号:US4196277A

    公开(公告)日:1980-04-01

    申请号:US914327

    申请日:1978-06-12

    摘要: This invention relates to a novel aromatic dianhydride and more particularly to the use of said dianhydride for the preparation of thermally stable high-molecular weight polymers including, for example, polybenzimidazoles, polypyrrones, polyimides, and the like. This dianhydride is obtained by reacting a stoichiometric amount of a disodium salt of 2,2-bis(4-hydroxyphenyl) hexafluoropropane with 4-chloro-N-phenylphthalimide to obtain an intermediate, 2,2-bis[4-(3,4-phenylphthalimidephenoxy)phenyl] hexafluoropropane, which is oxidized to the corresponding bis[4-(3,4-dicarboxyphenoxy)phenyl]perfluoroisopropylidene dianhydride.

    摘要翻译: 本发明涉及一种新的芳族二酸酐,更具体地说涉及所述二酐用于制备热稳定的高分子量聚合物(包括例如聚苯并咪唑,聚吡咯,聚酰亚胺等)的用途。 该二酐通过使化学计量量的2,2-双(4-羟基苯基)六氟丙烷的二钠盐与4-氯-N-苯基邻苯二甲酰亚胺反应获得中间体2,2-双[4-(3,4 - 苯基苯基亚氨基苯氧基)苯基]六氟丙烷,其被氧化成相应的双[4-(3,4-二羧基苯氧基)苯基]全氟异亚丙基二酐。

    Compliant maleimide based plastics
    4.
    发明授权
    Compliant maleimide based plastics 失效
    符合马来酰亚胺基塑料

    公开(公告)号:US4116937A

    公开(公告)日:1978-09-26

    申请号:US717785

    申请日:1976-08-25

    IPC分类号: C08G73/12 C08G69/44

    摘要: Polyaminobismaleimides having superior thermomechanical properties can be produced by reacting maleimide terminated polyaliphatic ethers and maleimide terminated aromatic compounds with an aromatic diamine. These bismaleimide polymers display high recoverable elongation together with good tensile adhesive and electrical properties and thermal and fuel stability.

    摘要翻译: 具有优异的热机械性能的聚氨基双马来酰亚胺可以通过使马来酰亚胺封端的聚脂族醚和马来酰亚胺封端的芳族化合物与芳族二胺反应来制备。 这些双马来酰亚胺聚合物显示出高可恢复伸长率以及良好的拉伸粘合剂和电性能以及热和燃料稳定性。

    Bis(benzil) type compounds containing one or two furan moieties
    5.
    发明授权
    Bis(benzil) type compounds containing one or two furan moieties 失效
    BIS(BENZIL)类型化合物包含一个或两个FURAN MOIETIES

    公开(公告)号:US4032546A

    公开(公告)日:1977-06-28

    申请号:US576827

    申请日:1975-05-12

    IPC分类号: C07D307/46 C08G69/34

    CPC分类号: C08G69/34 C07D307/46

    摘要: A monomeric bis (benzil) composition is produced by reacting furfural with an aromatic dialdehyde, the product having the structure: ##STR1## wherein R is a difunctional aromatic radical, R' is a hydrogen, a phenylene, or a furan radical, and R" is a hydrogen or or an alkyl substituent. These monomers are used to prepare cross-linked polyquinoxaline resins which have enhanced thermal and mechanical properties. Polymerization of these bis(benzil) monomers occurs by the reaction of the carbonyl groups with a tetraamine monomer. Cross-linking of the resulting polymers chains is accomplished by reaction of the furan end-cap group in a Diels-Alder reaction with a bis(dieneophile) substantially aromatic in composition.

    Flexibilized vinyl polybutadiene maleimide resins
    7.
    发明授权
    Flexibilized vinyl polybutadiene maleimide resins 失效
    柔性乙烯基聚丁二烯马来酰亚胺树脂

    公开(公告)号:US4229550A

    公开(公告)日:1980-10-21

    申请号:US968331

    申请日:1978-12-11

    IPC分类号: C08F279/02

    CPC分类号: C08F279/02

    摘要: Vinyl polybutadiene maleimide prepolymers which are peroxide curable are provided. The prepolymers are formed from the reaction product of a vinyl polybutadiene providing pendant vinyl groups and a maleimide and, more particularly, a mixture of aliphatic maleimides with cycloaliphatic or aromatic maleimides in combination with a peroxide-free radical initiator. The prepolymer is a vinyl polybutadiene backbone structure having grafted maleimide polymers forming cross-linking between polybutadiene backbone segments. The resultant prepolymer can be subsequently cured to a hard resin by heating in the presence of a peroxide-free radical initiator to form cross-linking between vinyl polybutadiene structures through the pendant vinyl groups. The resultant hard resin provides strength retention at elevated temperatures and exhibits a flexibility and strength without being brittle.

    摘要翻译: 提供了可过氧化物固化的乙烯基聚丁二烯马来酰亚胺预聚物。 预聚物由提供乙烯基侧链的乙烯基聚丁二烯和马来酰亚胺的反应产物形成,更具体地,是与脂肪族或芳族马来酰亚胺的混合物与无过氧化物的自由基引发剂的组合形成。 预聚物是具有在聚丁二烯骨架段之间形成交联的接枝的马来酰亚胺聚合物的乙烯基聚丁二烯骨架结构。 随后通过在无过氧化物的自由基引发剂的存在下加热固化所得的预聚物,以通过乙烯基侧基形成乙烯基聚丁二烯结构之间的交联。 所得到的硬树脂在高温下提供强度保持性,并显示出柔韧性和强度,而不会变脆。

    Spacecraft including control vanes having variable absorptive, reflective and emissive characteristics
    8.
    发明授权
    Spacecraft including control vanes having variable absorptive, reflective and emissive characteristics 有权
    包括具有可变吸收,反射和发射特性的控制叶片的航天器

    公开(公告)号:US07219860B2

    公开(公告)日:2007-05-22

    申请号:US11044550

    申请日:2005-01-27

    IPC分类号: B64G1/36

    摘要: A spacecraft including control vanes for controlling the pointing direction of the spacecraft by providing a variable absorptive, reflective, emissive and/or transmissive properties. The control vanes provide a torque on the spacecraft to maintain the spacecraft pointing towards the sun. The control vanes can include at least one xb-axis control vane and at least one yb-axis control vane where the xb axis control vane provides xb-axis control torque on the spacecraft rotated about the xb-axis, and the yb-axis control vane provides yb-axis control torque on the spacecraft when rotated about the yb-axis.

    摘要翻译: 包括用于通过提供可变的吸收性,反射性,发射性和/或透射特性来控制航天器的指向方向的控制翼片的航天器。 控制叶片在航天器上提供扭矩,以保持航天器指向太阳。 控制叶片可以包括至少一个x轴控制叶片和至少一个轴向控制叶片,其中x B轴 控制叶片在围绕x轴旋转的航天器上提供x轴控制扭矩,并且y2轴控制叶片提供 在绕y轴转动的情况下,航天器的转矩控制转矩。

    Solar torque control using thin film directionally reflective, emissive, absorptive and transmissive surfaces
    9.
    发明授权
    Solar torque control using thin film directionally reflective, emissive, absorptive and transmissive surfaces 失效
    使用薄膜定向反射,发射,吸收和透射表面的太阳能转矩控制

    公开(公告)号:US06921050B2

    公开(公告)日:2005-07-26

    申请号:US10346888

    申请日:2003-01-17

    摘要: Controlling the solar torque imposed on a spacecraft (10) in flight by providing a film (52) with variable absorptive, reflective, emissive and/or transmissive properties on the sun side of a thermal shield (50) of the spacecraft (10). As the orientation of the thermal shield (50) changes relative to the sun line, the absorptive, reflective, emissive and/or transmissive properties of the shield (50) change to cause the shield's (50) center of solar pressure to change, thus aligning it with the spacecraft (10) center of mass (24) as viewed from the direction of the sun line. In accordance with another embodiment of the invention, the spacecraft (100) is provided with a plurality of control vanes (110-116) that have a variable absorptive, transmissive, reflective and emissive property to maintain the spacecraft (100) stably pointed towards the sun.

    摘要翻译: 通过在太空飞船(10)的热屏蔽(50)的太阳侧上提供具有可变吸收,反射,发射和/或透射特性的薄膜(52)来控制飞行中施加在航天器(10)上的太阳能转矩。 随着热屏蔽(50)的取向相对于太阳线变化,屏蔽(50)的吸收,反射,发射和/或透射特性改变,从而使屏蔽(50)的太阳压力中心发生变化,因此 将其与太阳线方向观察时的航天器(10)质心(24)对准。 根据本发明的另一个实施例,航天器(100)设置有多个控制叶片(110-116),其具有可变的吸收性,透射性,反射性和发射性,以将航天器(100)稳定地朝向 太阳。

    Method for aligning a spacecraft
    10.
    发明授权
    Method for aligning a spacecraft 失效
    对准航天器的方法

    公开(公告)号:US07051981B2

    公开(公告)日:2006-05-30

    申请号:US11044308

    申请日:2005-01-27

    IPC分类号: B64G1/36

    摘要: Controlling the solar torque imposed on a spacecraft (10) in flight by providing a film (52) with variable absorptive, reflective, emissive and/or transmissive properties on the sun side of a thermal shield (50) of the spacecraft (10). As the orientation of the thermal shield (50) changes relative to the sun line, the absorptive, reflective, emissive and/or transmissive properties of the shield (50) change to cause the shield's (50) center of solar pressure to change, thus aligning it with the spacecraft (10) center of mass (24) as viewed from the direction of the sun line. In accordance with another embodiment of the invention, the spacecraft (100) is provided with a plurality of control vanes (110–116) that have a variable absorptive, transmissive, reflective and emissive property to maintain the spacecraft (100) stably pointed towards the sun.

    摘要翻译: 通过在太空飞船(10)的热屏蔽(50)的太阳侧上提供具有可变吸收,反射,发射和/或透射特性的薄膜(52)来控制飞行中施加在航天器(10)上的太阳能转矩。 随着热屏蔽(50)的取向相对于太阳线变化,屏蔽(50)的吸收,反射,发射和/或透射特性改变,从而使屏蔽(50)的太阳压力中心发生变化,因此 将其与太阳线方向观察时的航天器(10)质心(24)对准。 根据本发明的另一个实施例,航天器(100)设置有多个控制叶片(110-116),其具有可变的吸收性,透射性,反射性和发射性,以将航天器(100)稳定地朝向 太阳。