公开(公告)号：US5770108A

公开(公告)日：1998-06-23

申请号：US668157

申请日：1996-06-21

申请人： Yoshiyuki Totani ,  Motokazu Hirao ,  Atsuo Otsuji ,  Tsutomu Ishida ,  Hiroe Kayashima ,  Masakatsu Nakatsuka

发明人： Yoshiyuki Totani ,  Motokazu Hirao ,  Atsuo Otsuji ,  Tsutomu Ishida ,  Hiroe Kayashima ,  Masakatsu Nakatsuka

IPC分类号： C07D239/26 ,  C07D239/28 ,  C07D239/34 ,  C07D401/10 ,  C07D401/12 ,  C09K19/34 ,  C07D239/02 ,  C09K19/32 ,  C07D69/76

CPC分类号： C07D239/26 ,  C07D239/28 ,  C07D239/34 ,  C07D401/10 ,  C07D401/12 ,  C09K19/3458 ,  C09K19/3463 ,  C09K19/3466 ,  C09K19/3469

摘要： A novel pyrimidine compound represented by the following Formulas (1) and (2), a liquid crystal composition containing said compound and a liquid crystal element having excellent characteristics such as high speed response, orientation and high contrast ratio. ##STR1## wherein R.sub.1 and R.sub.2 each represent a linear or branched alkyl or alkenyl group, an alkoxyl or alkenyloxy group; R.sub.3 and R.sub.4 each represent a linear or branched alkyl group or alkenyl group; A.sub.1 and A.sub.2 each represent a substituted or unsubstituted 1,4-phenylene group, a pyridine-2,5-diyl or trans-1,4-cyclohexylene group; X.sub.1 and X.sub.2 each represent a single bond, --COO--, --OCO--, --OCH.sub.2 or --CH.sub.2 O-- group; Y.sub.1 and Y.sub.2 each represent --COO-- or --OCO-- group; and a, b, p, q, m and n each represent 0 or 1, provided that a+b+p+q is not 0.

摘要翻译： 一种由下式（1）和（2）表示的新型嘧啶化合物，含有所述化合物的液晶组合物和具有优异特性如高速响应，取向和高对比度的液晶元件。 （1）其中R1和R2各自表示直链或支链烷基或链烯基，烷氧基或烯氧基; R3和R4各自表示直链或支链烷基或烯基; A1和A2各自表示取代或未取代的1,4-亚苯基，吡啶-2,5-二基或反式-1,4-亚环己基; X1和X2各自表示单键，-COO-，-OCO-，-OCH2或-CH2O-基团; Y1和Y2各自表示-COO-或-OCO-基团; 并且a，b，p，q，m和n各自表示0或1，条件是a + b + p + q不为0。

公开(公告)号：US5380814A

公开(公告)日：1995-01-10

申请号：US73677

申请日：1993-06-08

申请人： Yoshiyuki Totani ,  Motokazu Hirao ,  Tomonori Ito ,  Masakatsu Nakatsuka ,  Akihiro Yamaguchi

发明人： Yoshiyuki Totani ,  Motokazu Hirao ,  Tomonori Ito ,  Masakatsu Nakatsuka ,  Akihiro Yamaguchi

IPC分类号： C08G64/14 ,  C08G64/28 ,  C08G64/00

CPC分类号： C08G64/14 ,  C08G64/28

摘要： A process for producing an aromatic polycarbonate by reacting an aromatic dihydroxy compound, an alkali or alkaline earth metal base and a carbonyl halide compound comprises feeding a polymerization catalyst as the carbonyl halide is fed to a mixture of the aromatic dihydroxy compound, the alkali metal or alkaline earth metal, water and an organic solvent. The molecular weight of the aromatic polycarbonate can be properly controlled, the rate of end capping is high, and coloration of the aromatic polycarbonate is less. Such aromatic polycarbonate can be produced while suppressing hydrolysis of the carbonyl halide compound and/or haloformate compound.

摘要翻译： 通过使芳族二羟基化合物，碱金属或碱土金属碱和羰基卤化合物反应来制备芳族聚碳酸酯的方法包括在将羰基卤化物进料到芳族二羟基化合物，碱金属或 碱土金属，水和有机溶剂。 可以适当地控制芳族聚碳酸酯的分子量，封端速度高，芳族聚碳酸酯的着色较少。 可以在抑制羰基卤化合物和/或卤代甲酸酯化合物的水解的同时制备这种芳族聚碳酸酯。

公开(公告)号：US5359117A

公开(公告)日：1994-10-25

申请号：US87340

申请日：1993-07-08

申请人： Yoshiyuki Totani ,  Motokazu Hirao ,  Tomonori Ito ,  Masakatsu Nakatsuka ,  Akihiro Yamaguchi ,  Ken-Ichi Goto ,  Takashi Kuroki ,  Yukiko Mori ,  Shoji Obuchi ,  Masahiro Ohta

发明人： Yoshiyuki Totani ,  Motokazu Hirao ,  Tomonori Ito ,  Masakatsu Nakatsuka ,  Akihiro Yamaguchi ,  Ken-Ichi Goto ,  Takashi Kuroki ,  Yukiko Mori ,  Shoji Obuchi ,  Masahiro Ohta

IPC分类号： C08G64/24 ,  C07C69/96

CPC分类号： C08G64/24

摘要： A process for producing continuously an aromatic polycarbonate oligomer by reacting an aromatic dihydroxy compound and an alkali metal base or an alkaline earth metal base with a carbonyl halide compound comprises:(1) feeding continuously to a tank reactor an aromatic dihydroxy compound, water, a molecular weight controlling agent, a polymerization catalyst, a carbonyl halide compound, and an organic solvent, and an alkali metal base or an alkaline earth metal base in an amount of 1.15-1.6 equivalents based on the aromatic dihydroxy compound,(2) carrying out the reaction with a residence time as defined by the following formula,log Y

摘要翻译： 通过使芳族二羟基化合物和碱金属碱或碱土金属碱与羰基卤化合物反应来连续生产芳族聚碳酸酯低聚物的方法包括：（1）连续地向罐式反应器中加入芳族二羟基化合物，水， 分子量控制剂，聚合催化剂，羰基卤化合物和有机溶剂，碱金属碱或碱土金属碱的用量为1.15-1.6当量，基于芳族二羟基化合物，（2）进行 具有如下式所定义的停留时间的反应log Y <-2.19X + 1.84（0.0005≤X<0.84,1

公开(公告)号：US5861108A

公开(公告)日：1999-01-19

申请号：US673093

申请日：1996-07-01

申请人： Tsutomu Ishida ,  Atsuo Otsuji ,  Yoshiyuki Totani ,  Motokazu Hirao ,  Hiroe Kayashima ,  Masakatsu Nakatsuka

发明人： Tsutomu Ishida ,  Atsuo Otsuji ,  Yoshiyuki Totani ,  Motokazu Hirao ,  Hiroe Kayashima ,  Masakatsu Nakatsuka

IPC分类号： C07C69/94 ,  C09K19/02 ,  C09K19/32 ,  C09K19/34 ,  C07C22/00 ,  C07C69/76

CPC分类号： C09K19/0225 ,  C07C69/94 ,  C09K19/02 ,  C09K19/322 ,  C09K19/3444

摘要： Provided is a naphthalene compound represented by the following Formula (1): ##STR1## wherein R.sub.1 and R.sub.2 each represent a linear or branched alkyl group having 1 to 20 carbon atoms, an alkoxyalkyl group having 2 to 20 carbon atoms or an alkenyl group having 2 to 20 carbon atoms which may be substituted with halogen atoms and have no asymmetric carbon atoms; A represents any of the groups represented by the following formulas: ##STR2## (wherein X.sub.1, X.sub.2, X.sub.3 and X.sub.4 each represent a hydrogen atom or a halogen atom); and z represents 0 or 1. The addition of this naphthalene compound to a liquid crystal composition makes it possible to improve various characteristics such as the high speed response property of the liquid crystal composition and the temperature dependency of the response time. The above naphthalene compound is useful as a liquid crystal material for liquid crystal compositions, particularly ferroelectric liquid crystal compositions.

摘要翻译： 提供由下式（1）表示的萘化合物：其中R 1和R 2各自表示具有1至20个碳原子的直链或支链烷基，具有2至20个碳原子的烷氧基烷基或 可以被卤素原子取代并且不具有不对称碳原子的具有2-20个碳原子的烯基; A表示由下式表示的任何基团：其中X 1，X 2，X 3和X 4各自表示氢原子或卤原子; z表示0或1.通过将该萘化合物加入到液晶组合物中，可以提高液晶组合物的高速响应特性和响应时间的温度依赖性等各种特性。 上述萘化合物可用作液晶组合物的液晶材料，特别是铁电液晶组合物。

公开(公告)号：US5426170A

公开(公告)日：1995-06-20

申请号：US158518

申请日：1993-11-29

申请人： Motokazu Hirao ,  Yoshiyuki Totani ,  Tomonori Ito ,  Masakatsu Nakatsuka ,  Akihiro Yamaguchi

发明人： Motokazu Hirao ,  Yoshiyuki Totani ,  Tomonori Ito ,  Masakatsu Nakatsuka ,  Akihiro Yamaguchi

IPC分类号： C08G64/14 ,  C08G64/24 ,  C08G64/28 ,  C08G64/00

CPC分类号： C08G64/28 ,  C08G64/14 ,  C08G64/24

摘要： 1. A method for preparing an aromatic polycarbonate having less content of a low molecular weight oligomer which comprises the steps of:(A) conducting an interfacial polymerization reaction in a reaction system comprising at least one aromatic dihydroxy compound, a carbonate precursor, an alkali metal or alkaline earth metal base, water and an organic solvent in the absence of an endcapping agent, and(B) conducting an interfacial polymerization reaction with the addition of an endcapping agent after at least one of the following parameters reaches a predetermined value:(1) a weight-average molecular weight of a prepolymer obtained in step A,(2) a residual amount of the aromatic dihydroxy compound which is contained in the reaction mixture obtained in step A,(3) an amount ratio of a bishaloformate compound to a prepolymer wherein the bishaloformate compound is a bishaloformate derivative of a dihydroxy compound and is contained in the reaction mixture obtained in step A.

摘要翻译： 1.一种制备低分子量低聚物含量较低的芳族聚碳酸酯的方法，其包括以下步骤：（A）在包含至少一种芳族二羟基化合物，碳酸酯前体，碱的反应体系中进行界面聚合反应 金属或碱土金属碱，水和有机溶剂，和（B）在至少一个以下参数达到预定值后，加入封端剂进行界面聚合反应：（ 1）步骤A中获得的预聚物的重均分子量，（2）步骤A中获得的反应混合物中所含的芳族二羟基化合物的残留量，（3）双卤代甲酸酯化合物与 预聚物，其中双卤代甲酸酯化合物是二羟基化合物的双卤代甲酸酯衍生物，并且包含在步骤A中获得的反应混合物中。