Method of preparing zinc-modified phenol-aldehyde novolak...

Details Method of preparing zinc-modified phenol-aldehyde novolak... Method of preparing zinc-modified phenol-aldehyde novolak...

C - Chemistry, Metallurgy

08

G

402/7.3

C08G 8/18 (2006.01) B41M 5/155 (2006.01)

Patent

CA 1120182

ABSTRACT OF THE DISCLOSURE A method of making zinc-modified phenol-aldehyde novolak resins for use as a color-developing agent in pressure-sensitive record sheet mate- rial involving the addition of certain dry particulate zinc compounds and an ammonium carboxylate to the melted resin. Specifically, a phenol-formalde- hyde resin is reacted with zinc oxide or zinc carbonate and ammonium form- ate.

327098

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