Process for the production of microcapsules

Details Process for the production of microcapsules Process for the production of microcapsules

1976-03-08

1983-04-05

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

71DIG1, 252522A, 264 4, 427221, B01J 1302

Patent

active

043790712

ABSTRACT:
Process for the production of microcapsules, characterized in that a reaction product of a diol or polyol which has a molecular weight of 400 to 10,000 with phosgene or a di- or polyisocyanate which contains at least two chloroformic acid ester or isocyanate groups per molecule is mixed with the substance with is required to be enveloped (core material) and this mixture, an at least bifunctional chain lengthening agent for the reaction product and an aqueous phase are introduced into a zone of high turbulence where the reaction product and chain lengthening agent react to form a high molecular weight polymer which encloses the substance which is to be enveloped to form microcapsules which are then separated.

REFERENCES:
patent: 3726804 (1973-04-01), Matsukawa et al.
patent: 3796669 (1974-03-01), Kiritani et al.

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