Porous diaphragms
    4.
    发明授权
    Porous diaphragms 失效
    多孔隔膜

    公开(公告)号:US4098672A

    公开(公告)日:1978-07-04

    申请号:US657704

    申请日:1976-02-12

    CPC分类号: C25B13/08 H01J31/36

    摘要: A process for the manufacture of a porous diaphragm of a synthetic material, especially polytetrafluoroethylene, which comprises forming a sheet of the synthetic material in admixture with a solid particulate additive (eg starch) to be removed therefrom, introducing said sheet into an electrolytic cell, filling the cell with the working electrolyte and removing the solid particulate in situ in the cell by electrolysing the said electrolyte. The porous diaphragms are especially suitable for use in diaphragm cells for the production of chlorine wherein the working electrolyte is sodium chloride brine.

    摘要翻译: 一种用于制造合成材料,特别是聚四氟乙烯的多孔隔膜的方法,其包括将合成材料的片材与待除去的固体颗粒添加剂(例如淀粉)混合形成,将所述片材引入电解槽中, 用工作电解质填充电池并通过电解所述电解质在电池中原位除去固体颗粒。 多孔隔膜特别适用于用于生产氯的隔膜电池,其中工作电解质是氯化钠盐水。

    Relation to lithographic printing forms
    6.
    发明授权
    Relation to lithographic printing forms 有权
    与平版印刷版的关系

    公开(公告)号:US06280899B1

    公开(公告)日:2001-08-28

    申请号:US09483990

    申请日:2000-01-18

    IPC分类号: G03C176

    摘要: Thermally imageable lithographic printing plate precursors and heat-sensitive compositions for use in these printing plate precursors are disclosed. The compositions contain an aqueous developer soluble polymer, such as a phenolic resin; a compound that reduces the aqueous developer solubility of the polymer; and optionally, and infrared absorber. Examples of compounds that reduce the aqueous developer solubility of the polymer are those that contain at least one quarternized nitrogen atom, such as quinolinium compounds, benzothiazolium compounds, pyridinium compounds, and imidazoline compounds. On thermal imaging, the irradiated areas become more soluble in the aqueous developer and can be removed to form a positive image.

    摘要翻译: 公开了用于这些印版前体的可热成像的平版印刷版前体和热敏组合物。 组合物含有显影剂水溶性聚合物,例如酚醛树脂; 降低聚合物的水性显影剂溶解度的化合物; 和任选地,和红外线吸收剂。 降低聚合物的水性显影剂溶解度的化合物的实例是含有至少一个季铵化氮原子的化合物,例如喹啉鎓化合物,苯并噻唑鎓化合物,吡啶鎓化合物和咪唑啉化合物。 在热成像中,被照射的区域变得更易溶于含水显影剂,并且可以除去以形成正像。