MICROCAPSULES

摘要

M I C R O C A P S U L E S Microcapsules containing a colour-former solution: which is encapsulated in the form of a solution in an organic solvent in capsules of the polyaddition product of a diisocyanate corresponding to the following general formula: (I) wherein n = 3 - 6 and a diamine wherein a mixture of an alkyl naphthalene and an isoparaffin containing from 10 to 20 carbon atoms is used as the solvent for the colour-former and the microcapsules are tempered for at least 2 hours at a temperature of from 60 to 70.degree.C after their formation. Le A 19 505