Method for the removal of free formaldehyde from a...

Details Method for the removal of free formaldehyde from a... Method for the removal of free formaldehyde from a...

B - Operations, Transporting

41

M

42/15

B41M 5/165 (2006.01) B01J 13/20 (2006.01)

Patent

CA 1224037

- 10 - ABSTRACT METHOD FOR THE REMOVAL OF FREE FORMALDEHYDE FROM A FORMALDEHYDE-CONTAINING SUSPENSION OF MICROCAPSULES 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.

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