Process for the production of hydroprobic liquid containing microcapsules with a high content of dry abstracts, thus obtained microcapsules and process for obtaining pressure sensitive paper therewith.

摘要

Prodn. of microcapsules contg. a hydrophobic liq. (A) comprises (1) forming a suspension, in aq. acid phase, of particles that comprise droplets of (A) coated with a coacervate formed from gelatine, polyacrylate acid (PAA) and carboxymethyl cellulose (CMC) (as first and second anionic colloids); the particles have dia. 1-12 (pref. 3-8) microns; (2) cooling to solidify the microcapsules wall; (3) crosslinking the gelatine; and (4) neutralising. Also claimed are the prepd. microcapsules pref. having dry extract content 30-40 wt.% and a dia. 1-12 (esp. 3-8) microns.