Thermal sensitive transparency
    4.
    发明授权
    Thermal sensitive transparency 失效
    热敏透明度

    公开(公告)号:US3914510A

    公开(公告)日:1975-10-21

    申请号:US45288074

    申请日:1974-03-20

    Applicant: NCR CO

    Abstract: A thermal-sensitive transparency is disclosed. A transparent film substrate is coated with a mixture of a binder and sulfonic acid. A second coating of a binder and a chromogenic compound is applied over the first coating. The binder of the first coating is not soluble in the solvent used to apply the second coating. The thus coated transparency can be imaged in conventional thermal copy machines and used in conventional projection equipment.

    Abstract translation: 公开了一种热敏透明度。 用粘合剂和磺酸的混合物涂覆透明膜基材。 在第一涂层上施加粘合剂和显色化合物的第二涂层。 第一涂层的粘合剂不溶于用于施加第二涂层的溶剂中。 这样涂覆的透明体可以在常规热复印机中成像并用于常规投影设备中。

    Phthalide compounds
    5.
    发明授权
    Phthalide compounds 失效
    苯酞化合物

    公开(公告)号:US3873573A

    公开(公告)日:1975-03-25

    申请号:US37483873

    申请日:1973-06-29

    Applicant: NCR CO

    CPC classification number: C07D307/885 C07D307/88 C09B11/24

    Abstract: Processes for the synthesis of phthalides and fluorans are disclosed. New isolatable intermediate phthalides have been found which serve as precursors to the production of fluorans. The products of this invention are synthesized from keto acids and phenolic amines, wherein the mole ratio of the keto acids to the phenolic amines is in excess of 1:1. Not only is product yield greatly improved, but usual condensation times of 24 hours and longer have been reduced to about 5 hours.

    Abstract translation: 公开了合成苯酞和荧烷的方法。 已经发现新的可分离的中间体酞酸酯用作荧光体生产的前体。 本发明的产物由酮酸和酚胺合成,其中酮酸与酚胺的摩尔比超过1:1。 不仅产品产量大大提高,而且24小时以上的通常冷凝时间已经降低到约5小时。

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