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EP0040770A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Concentrated suspension of microcapsules, a process for its preparation and its use in transfer-copying paper

Assignee: Bayer AG
•
Filing: 1981-05-15
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Granted: —
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Expires: 2001-05-15
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Abstract

Abstract Translated from German Verfahren zur Herstellung von 35 - 60 Gew.-% Mikrokapseln enthaltenden wäßrigen Suspensionen nach dem Grenzilächenpolyadditionsverfahren aus Polyisocyanaten und H-aktiven Verbindungen, in welchem a) als Polyisocyanat ein Isocyanurat-modifiziertes aliphatisches Polyisocyanat verwendet wird, und b) im Anschluß an die Polyaddition die Suspension auf einen pH-Wert <= 7 gebracht wird, wobei die Mikrokapseln gegebenenfalls Farbstoffvorläufer enthalten und zur Herstellung ganz oder partiell kopierender Durchschreibesysteme nach dem Tief- oder Flexodruckverfahren verwendet werden können. Process for the preparation of aqueous suspensions containing 35-60% by weight of microcapsules according to the Grenzilächenpolyadditionsverfahren from polyisocyanates and H-active compounds, in which a) an isocyanurate-modified aliphatic polyisocyanate is used as the polyisocyanate, and b) following the polyaddition Suspension is brought to a pH <= 7, the microcapsules optionally containing dye precursors and can be used for the production of completely or partially copying copy systems by gravure or flexographic printing.

Inventors

  • 👤 Gert Dr. Jabs
  • 👤 Günther Dr. Baatz
  • 👤 Manfred Dr. Bock
  • 👤 Manfred Dr. Dahm
  • 👤 Artur Dr. Haus
  • 👤 Christian Dr. Wegner

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-04 11:31
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/14; B01J13/16; B41; B41M; B41M5/00; B41M5/124; B41M5/165

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

GB1091141A Cited
DE1222067B Cited
DE2242910A1 Cited
DE2251381A1 Cited
US3914511A Cited
DE2541001A1 Cited
DE2557407A1 Cited
DE2655048A1 Cited
DE2756586A1 Cited
DE2833651A1 Cited
EP0016378A1 Cited

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