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2. 发明授权

US4166804A Polymeric color indicators and a method of their preparation 失效
标题翻译：聚合颜色指示剂及其制备方法
公开(公告)号：US4166804A
公开(公告)日：1979-09-04
申请号：US842273
申请日：1977-10-14
申请人： Miroslav Bleha , Zdenek Plichta , Eva Votavova , Jaroslav Kalal
发明人： Miroslav Bleha , Zdenek Plichta , Eva Votavova , Jaroslav Kalal
IPC分类号： G01N31/22 , G01N21/08 , C08F8/30 , C08J9/00
CPC分类号： G01N31/221
摘要： Polymeric color pH indicators are prepared which are insoluble in the measured aqueous medium and show a certain range of color change. These polymeric indicators are the product of copolymerization of a hydrophilic comonomer, selected from esters, amides and N-substituted amides of acrylic and methacrylic acid, with 0.1- 30 wt.% of a comonomer. The comonomer forms the pH-indicating color center by a subsequent coupling with a suitable diazonium salt or a passive component. Vinylic monomers comprising an aromatic system in the molecule are suitable as the functional comonomers. The indicators are prepared by radical copolymerization of the comonomers either in a suspension or in a solution, followed by the subsequent coupling with a diazonium compound, or diazotizing and coupling with a passive component, to obtain the pH-indicating sites of polymer. The product is in the form of small spherical macroporous particles suitable for pH indication in flow-through column processes, in small volumes, or on a microscope stage, or in the form of a solution applicable as a paint and indicating the pH of vessels, reactors, etc. coated therewith, or useful for application to inert carriers.
摘要翻译：制备聚合物颜色pH指示剂，其不溶于测量的水性介质并显示一定范围的颜色变化。这些聚合物指示剂是选自丙烯酸和甲基丙烯酸的酯，酰胺和N-取代的酰胺的亲水共聚单体与0.1-30重量％的共聚单体共聚的产物。共聚单体通过与合适的重氮盐或无源组分的后续偶联形成pH-指示颜色中心。分子中包含芳族体系的乙烯基单体适用作为功能性共聚单体。指示剂通过在悬浮液或溶液中共聚单体的自由基共聚制备，随后与重氮化合物偶联，或与无源组分重氮化并偶联，得到聚合物的pH指示位点。该产品是适于在流通柱方法中以小体积或在显微镜载物台上的pH指示的小球形大孔颗粒的形式，或以可用作涂料的溶液形式并指示血管的pH值，反应器等，或者可用于惰性载体。

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