A process for the preparation of microcapsules containing hydrophobic liquid with a high dry extract content, resulting microcapsules and a method for the production of pressure-sensitive paper thus

摘要

The invention relates to a process for producing microcapsules containing a hydrophobic liquid. & br / according to the invention, the method comprises the following steps: & br / - formation of an emulsion of a hydrophobic organic phase, in an aqueous phase in which is dissolved, gelatin, a first colloid anionic constituted by polyacrylic acid, of the carboxymethylcellulose as a second colloid so as to form of particles having a diameter of 1 to 12 μm approximately, & br / - coacervation of the emulsion in acid medium and cooling, & br / - crosslinking of gelatin and neutralization. & br / the invention also relates to the microcapsules obtained and a process for obtaining a paper which is sensitive to the pressure with the aid of these microcapsules.