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    • 5. 发明授权
    • Smectic liquid crystal composition for recording display medium,
recording display medium and use thereof
    • 用于记录显示介质的记录液晶组合物,记录显示介质及其用途
    • US5932137A
    • 1999-08-03
    • US647822
    • 1996-05-15
    • Atsushi BabaWataru SaitoIsa NishiyamaAtsushi Yoshizawa
    • Atsushi BabaWataru SaitoIsa NishiyamaAtsushi Yoshizawa
    • G02F1/1333C09K19/12C09K19/44C09K19/46C09K19/54G02F1/13C09K19/20
    • C09K19/12C09K19/46C09K19/544Y10T428/1036
    • A recording display medium is provided which can offer a high display contrast and is less likely to cause a lowering of contrast or disappearance of display even in low temperature and high temperature regions. A smectic liquid crystal composition, for use in the recording display medium, and use of the recording display medium are also provided. The liquid crystal composition comprises: at least one member selected from the group constituting of compounds represented by the following general formula (I): ##STR1## wherein R.sup.1 represents an alkyl or alkoxy group having 8 to 18 carbon atoms; and at least one member selected from the group consisting of compounds represented by the following general formulae (II) to (VII): ##STR2## wherein R.sup.2, R.sup.4, R.sup.5, and R.sup.6 represent an alkyl group having 2 to 18 carbon atoms, R.sup.3, R.sup.7, R.sup.8, R.sup.9, and R.sup.10 represent an alkyl or alkoxy group having 2 to 18 carbon atoms, and X represents a halogen atom or an alkyl or alkoxy group having 2 to 18 carbon atoms.
    • 提供了能够提供高显示对比度的记录显示介质,并且即使在低温和高温区域中也不太可能引起对比度降低或显示消失。 还提供了用于记录显示介质的近晶液晶组合物和记录显示介质的使用。 液晶组合物包含:选自由以下通式(I)表示的化合物组成的组中的至少一种:其中R1表示碳原子数为8〜18的烷基或烷氧基; 和选自由以下通式(II)至(VII)表示的化合物中的至少一种:其中R 2,R 4,R 5和R 6表示具有2至18个碳原子的烷基,R 3,R 7, R 8,R 9和R 10表示碳原子数2〜18的烷基或烷氧基,X表示卤素原子或碳原子数2〜18的烷基或烷氧基。
    • 8. 发明授权
    • Solid catalyst component and catalyst for olefin polymerization
    • 固体催化剂组分和烯烃聚合催化剂
    • US06228791B1
    • 2001-05-08
    • US09331894
    • 1999-07-06
    • Takuo KataokaMasayoshi SaitoIsa Nishiyama
    • Takuo KataokaMasayoshi SaitoIsa Nishiyama
    • B01J2100
    • C08F10/00C08F4/6567C08F4/6555C08F4/651C08F4/6465
    • The present invention is a solid catalyst component for polymerization of olefins prepared by contacting a magnesium compound, a tetravalent halogen-containing titanium compound, a diester of an aromatic dicarboxylic acid, an aromatic hydrocarbon and an organic aluminum compound containing a hydroxyl group represented by the following general formula (R1CO2)mAl(OH)3-m or aluminum hydroxide. The catalyst for polymerization of olefins comprising said solid catalyst component, an organic aluminum compound represented by the general formula R2pAlQ3-p and an organic silicon compound represented by the general formula R3qSi(OR4)4-q can retard the rate of forming a polymer having a low molecular weight or a low stereoregular polymer which is soluble in a polymerization solvent in slurry polymerization and can obtain a high stereoregular polymer in a high yield, and also can obtain a copolymer having an excellent property in a high yield in the copolymerization of olefins.
    • 本发明是通过使镁化合物,四价含卤素的钛化合物,芳族二羧酸的二酯,芳香族烃和含有羟基的有机铝化合物接触而制备的烯烃聚合用固体催化剂成分 遵循通式(R1CO2)mA1(OH)3-m或氢氧化铝。 包含所述固体催化剂组分,由通式R2pAlQ3-p表示的有机铝化合物和由通式R3qSi(OR4)4-q表示的有机硅化合物)的烯烃聚合催化剂可以延迟形成具有 低分子量或低立构规整性聚合物,其在淤浆聚合中可溶于聚合溶剂,并且可以高产率获得高立构规整性聚合物,并且还可以获得在烯烃共聚合中具有优异性能的共聚物 。