Microcapsules and their preparation

Details Microcapsules and their preparation Microcapsules and their preparation

1980-03-10

1981-11-10

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

252364, 282 275, 428307, 428914, B01J 1302

Patent

active

042997232

ABSTRACT:
Microcapsules containing a color-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: ##STR1## 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 color-former and the microcapsules are tempered for at least 2 hours at a temperature of from 60.degree. to 70.degree. C. after their formation.

REFERENCES:
patent: 3432327 (1969-03-01), Kan et al.
patent: 3677787 (1972-07-01), Augl et al.
patent: 3748329 (1973-07-01), Liebsch et al.

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