Method for the purification of 4,4'-diamino-diphenylmethane
    51.
    发明授权
    Method for the purification of 4,4'-diamino-diphenylmethane 失效
    4,4'-二氨基 - 二苯基甲烷的纯化方法

    公开(公告)号:US5312989A

    公开(公告)日:1994-05-17

    申请号:US68229

    申请日:1993-05-28

    IPC分类号: C07C209/84 C07C211/50

    CPC分类号: C07C209/84

    摘要: A method of purifying 4,4'-diaminodiphenylmethane comprising partially melting a crystal of crude 4,4'-diaminodiphenylmethane and removing a melt to obtain a high purity 4,4'-diaminodiphenylmethane. By utilizing the method, a high purity 4,4'-diaminodiphenylmethane is obtained efficiently with a low level of energy consumption.

    摘要翻译: 一种净化4,4'-二氨基二苯基甲烷的方法,包括部分熔融粗制4,4'-二氨基二苯基甲烷的结晶并除去熔体,得到高纯度的4,4'-二氨基二苯基甲烷。 通过利用该方法,以低能量消耗有效获得高纯度的4,4'-二氨基二苯基甲烷。

    Optical film
    55.
    发明授权
    Optical film 失效
    光学胶片

    公开(公告)号:US5244713A

    公开(公告)日:1993-09-14

    申请号:US887658

    申请日:1992-05-26

    摘要: An optical film having high optical uniformity is disclosed, including a thermoplastic resin film having no periodic thickness variation of sine waveform having a pitch of 50 mm or less and a thickness change of 0.5 .mu.m or more on continuous thickness measurement in the machine direction, and an optical film having a retardation value of 1200 nm or less with a fluctuation of not more than 10% and a rate of change of not more than 1.3%/cm, which is obtained by stretching said thermoplastic resin film. The optical film is laminated on a polarizing sheet to serve as a phase retarder.

    摘要翻译: 公开了一种具有高光学均匀性的光学膜,包括在机器方向上的连续厚度测量时,不具有间距为50mm以下的正弦波形的周期性厚度变化,厚度变化为0.5μm以上的热塑性树脂膜, 以及通过拉伸所述热塑性树脂膜获得的延迟值为1200nm以下的光学膜,其波动为10%以下,变化率为1.3%/ cm以下。 将光学膜层叠在偏光片上,作为相位延迟器。

    Process for producing coumarin derivatives
    56.
    发明授权
    Process for producing coumarin derivatives 失效
    生产香豆素衍生物的方法

    公开(公告)号:US5231194A

    公开(公告)日:1993-07-27

    申请号:US631316

    申请日:1990-12-21

    IPC分类号: B01J23/64 C07D311/10

    CPC分类号: B01J23/64 C07D311/10

    摘要: A process for producing a coumarin derivative represented by formula (II): ##STR1## wherein R.sub.1 to R.sub.4 are as defined in the specification, comprising the step of: subjecting to a ring formation and dehydrogenation reaction a 3-(2-cyclohexanoyl)-propionic acid ester derivative represented by formula (I): ##STR2## wherein R.sub.1 to R.sub.4 are as defined in the specification, the ring formation and dehydrogenation reaction being (1) conducted by use of a catalyst comprising a carrier having supported thereon palladium and either of chromium oxide and chromium hydroxide, or (2) conducted by use of a catalyst comprising a carrier having supported thereon palladium or a catalyst comprising a carrier having supported thereon palladium and either of chromium oxide and chromium hydroxide, in the presence of a promoter which is at least one member selected from the group consisting of magnesium trisilicate, zirconia, metallic chromium, and metallic tungsten.

    Adhesive tape
    58.
    发明授权
    Adhesive tape 失效
    胶带

    公开(公告)号:US5212011A

    公开(公告)日:1993-05-18

    申请号:US869120

    申请日:1992-04-15

    IPC分类号: C09J7/02

    摘要: The present invention relates to an adhesive tape which is low in cost and the properties of which such as unwindability, adhesiveness, trimmed clearance, printability, transparency and longitudinal tearing strength are improved without spoiling lateral hand cutting characteristics, wherein a smooth surface is formed on one side of a polyolefin resin base film and an uneven surface is formed on the other side thereof, the latter being coated with an adhesive and having an uneven depth of 0.03-0.30 mm and an uneven interval of 0.5-5.0 mm, the melt index of polyolefin resin being 0.2-20 g/10 min. and a surface wetting tension of the smooth surface of the polyolefin resin base film being less than 30 Dyn/cm and that of the uneven surface being more than 35 Dyn/cm.

    摘要翻译: 本发明涉及一种低成本的粘合带,并且改善了诸如可退卷性,粘合性,修剪间隙,可印刷性,透明度和纵向撕裂强度等性能,而不损害侧面手工切割特性,其中在 在其另一面上形成聚烯烃树脂基膜和不平坦表面的一面,后者涂有粘合剂,其深度不均匀为0.03-0.30mm,不均匀间隔为0.5-5.0mm,熔体指数 的聚烯烃树脂为0.2-20g / 10min。 并且聚烯烃树脂基膜的光滑表面的表面润湿张力小于30 Dyn / cm,不平坦表面的表面润湿张力大于35 Dyn / cm。

    Method of producing thin fiber-reinforced resin sheet
    60.
    发明授权
    Method of producing thin fiber-reinforced resin sheet 失效
    生产薄纤维增强树脂板的方法

    公开(公告)号:US5178706A

    公开(公告)日:1993-01-12

    申请号:US750237

    申请日:1991-08-20

    IPC分类号: B29C55/02 B32B37/14

    摘要: The thickness of a fiber-reinforced resin sheet having uniformly distributed and substantially unidirectional fibers is reduced by stretching a fiber-reinforced resin sheet starting material in intimate contact with a thermoplastic sheet having a tensile strength larger than the fiber-reinforced resin sheet. This is accomplished by heating the fiber-reinforced resin sheet at a temperature at which the resin in the fiber-reinforced resin becomes sticky and subjecting the sheets to a uniform compressive force to adhere the fiber-reinforced sheet to the thermoplastic resin sheet and then simultaneously stretching the thus-adhered sheets to form a thin fiber-reinforced sheet in which the direction of stretching is perpendicular to the direction of the fibers.

    摘要翻译: 通过拉伸与拉伸强度大于纤维增强树脂片材的热塑性片材紧密接触的纤维增强树脂片起始材料,可以减少具有均匀分布且基本上单向纤维的纤维增强树脂片材的厚度。 这是通过在纤维增强树脂中的树脂变粘的温度下加热纤维增强树脂片,并对片材施加均匀的压缩力以将纤维增强片粘附到热塑性树脂片上,然后同时 拉伸如此粘合的片材以形成其中拉伸方向垂直于纤维方向的薄纤维增强片材。