EP0138448A2
Expired / Lapsed
EP
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Method for producing a self-contained pressure-sensitive copying material involving the removal of free formaldehyde from a formaldehyde-containing suspension of microcapsules
Assignee: Wiggins Teape Group Ltd
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Filing: 1984-09-26
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Granted: —
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Expires: 2004-09-26
Abstract
Abstract Free formaldehyde is removed from a formaldehyde-containing suspension of microcapsules by the addition of a compound having a B dicarbonyl group or a cyclic ketone. The thus- treated microcapsules are particularly suitable for the production of self-contained pressure sensitive copying material in which the image-generating reactants are present in a single coating composition.
Inventors
- 👤 Peter Pinot De Moira
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 01:03
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/165; B01; B01J; B01J13/00; B01J13/02; B01J13/20; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249997
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