Method of making microcapsules having an improved pre-wall

Details Method of making microcapsules having an improved pre-wall Method of making microcapsules having an improved pre-wall

1989-12-14

1992-05-12

Stoll, Robert L.

Plastic and nonmetallic article shaping or treating: processes

Encapsulating normally liquid material

Liquid encapsulation utilizing an emulsion or dispersion to...

4283202, 4283215, 436138, 514911, B01J 1300

Patent

active

051125404

ABSTRACT:
A process for preparing microcapsules which comprises dispersing a hydrophobic oily liquid in a continuous aqueous phase, the hydrophobic oily liquid containing a pre-wall former and at least one chain extender, the chain extender being a polyhydric compound which is capable of reacting with the pre-wall former at a rate such that the chain extender does not substantially react with the pre-wall former prior to dispersing the hydrophobic oily liquid in the continuous aqueous phase; and forming capsule walls around the droplets of hydrophobic oily liquid in the continuous aqueous phase.

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