Maleimide copolymer as alignment layer for liquid-crystal displays
    2.
    发明授权
    Maleimide copolymer as alignment layer for liquid-crystal displays 失效
    马来酰亚胺共聚物作为液晶显示器的取向层

    公开(公告)号:US5644016A

    公开(公告)日:1997-07-01

    申请号:US295729

    申请日:1994-11-17

    摘要: Use of a polymer containing maleimide units of the formula I ##STR1## in which R.sup.1 is hydrogen, an acyclic or cyclic, aliphatic, aromatic or araliphatic radical which is chiral or achiral, can be monosubstituted or polysubstituted by functional groups and in which one or more CH.sub.2 groups can be replaced by functional groups, as alignment layer in liquid-crystal displays.Alignment layers containing a polymer conforming to the formula I effect, in particular, a suppression of twist states and ghost images and thus an improvement in the optical contrast.

    摘要翻译: PCT No.PCT / EP93 / 00740 Sec。 371日期:1994年11月17日 102(e)日期1994年11月17日PCT 1993年3月26日PCT公布。 出版物WO93 / 21556 PCT 日期:1993年10月28日使用一种含有式I的马来酰亚胺单元的聚合物,其中R 1是氢,是手性或非手性的无环或环状,脂族,芳族或芳脂族基团,可以被功能性单取代或多取代 基团,其中一个或多个CH 2基团可以被官能团取代,作为液晶显示器中的取向层。 包含符合式I的聚合物的取向层尤其影响扭曲状态和重影图像的抑制,从而改善了光学对比度。

    Process for preparing polyoxymethylene homo- and copolymers and apparatus suitable for this purpose
    3.
    发明申请
    Process for preparing polyoxymethylene homo- and copolymers and apparatus suitable for this purpose 审中-公开
    制备聚甲醛均聚物和共聚物的方法及适用于此目的的设备

    公开(公告)号:US20060252912A1

    公开(公告)日:2006-11-09

    申请号:US11405140

    申请日:2006-04-17

    IPC分类号: C08G65/34

    摘要: Process for preparing polyoxymethylene homo- and copolymers and apparatus suitable for this purpose An apparatus is described for preparing polyoxymethylene homo- and copolymers. This has the following elements: A) reactor (1) encompassing a polymerization zone (2) and a deactivation zone (3) directly downstream thereof for polymerizing and deactivating polyoxymethylene homo- and copolymers in a homogeneous phase in a manner known per se, B) depressurizing assembly (4), which, if appropriate, has a metering apparatus (5) for additives for the polymer, C) pelletizer (6), D) extraction apparatus (7), and E) if appropriate, a drying apparatus (8). Use of the apparatus and of the polymerization process carried out therein can achieve particularly low residual monomer contents in a simple manner which saves energy.

    摘要翻译: 制备聚甲醛均聚物和共聚物的方法以及适用于该目的的装置描述了一种用于制备聚甲醛均聚物和共聚物的装置。 这具有以下要素:A)包含聚合区(2)和直接在其下游的失活区(3)的反应器(1),用于以本身已知的方式使均聚相中的聚甲醛均聚物和共聚物聚合和失活,B 减压组件(4),如果合适,其具有用于聚合物的添加剂的计量装置(5),C)造粒机(6),D)提取装置(7)和E)如果合适,可以使用干燥装置 8)。 在其中进行的设备和聚合方法的使用可以以简单的方式实现特别低的残留单体含量,从而节省能量。

    Process for preparing
2,2'-bis(diphenylphosphinylmethyl)-1,1'-binaphthyls and new compounds
from this class of substances
    4.
    发明授权
    Process for preparing 2,2'-bis(diphenylphosphinylmethyl)-1,1'-binaphthyls and new compounds from this class of substances 失效
    制备2,2'-双(二苯基氧膦基甲基)-1,1'-联萘和这类物质的新化合物的方法

    公开(公告)号:US5767317A

    公开(公告)日:1998-06-16

    申请号:US826017

    申请日:1997-03-27

    IPC分类号: C07C17/14 C07F9/53 C07F9/50

    CPC分类号: C07F9/5329 C07C17/14

    摘要: The present invention relates to a process for preparing 2,2'-bis(diphenylphosphinylmethyl)-1,1'-binaphthyls by reacting a reaction mixture prepared in a solvent by reaction of 2,2'-dimethyl-1,1'-binaphthyl with a brominating agent to produce a mixture comprising 2,2'-bis(bromomethyl)-1,1'-binaphthyl and further brominated binaphthyls and optionally further comprising unreacted brominating agent, reacted brominating agent and solvent, with an alkyl diphenylphosphinite of the formula RO--P(Ph--(R').sub.n).sub.2, where R is an alkyl radical having from 1 to 5 carbon atoms, Ph is phenyl, R' is an alkyl radical having from 1 to 4 carbon atoms, CF.sub.3, fluorine, chlorine or bromine and n is 0, 1 or 2, at from 70.degree. to 180.degree. C. optionally in the presence of a further solvent.

    摘要翻译: 本发明涉及一种制备2,2'-双(二苯基氧膦基甲基)-1,1'-联萘的方法,通过使在溶剂中制备的反应混合物与2,2'-二(二苯基氧膦基甲基)-1,1'-联萘 与溴化剂反应以产生包含2,2'-双(溴甲基)-1,1'-联萘和另外溴化的联萘的混合物,并任选地还包含未反应的溴化剂,反应的溴化剂和溶剂与下式的烷基二苯基膦 RO-P(Ph-(R')n)2,其中R是具有1至5个碳原子的烷基,Ph是苯基,R'是具有1至4个碳原子的烷基,CF 3,氟, 氯或溴,n为0,1或2,70至180℃,任选在另外的溶剂存在下。

    INITIATOR
    5.
    发明申请
    INITIATOR 失效
    发起者

    公开(公告)号:US20080125566A1

    公开(公告)日:2008-05-29

    申请号:US11861832

    申请日:2007-12-11

    IPC分类号: C08G2/00 C09K3/00

    CPC分类号: C08G75/24 C08G2/06 C08G2/10

    摘要: An initiator for cationic polymerization comprises a salt of a protic acid as well as a protic acid. The molar ratio of protic acid to salt is in the range from 1:0.01 to 1:2000. The initiator is used for example for cationic homo- or copolymerization of trioxane, and permits stable and flexible operation of the polymerization.

    摘要翻译: 阳离子聚合引发剂包括质子酸和质子酸的盐。 质子酸与盐的摩尔比在1:0.01至1:2000的范围内。 引发剂用于例如三恶烷的阳离子均聚或共聚,并且允许聚合的稳定和灵活的操作。