Encapsulation process employing phase transfer catalysts

Details Encapsulation process employing phase transfer catalysts Encapsulation process employing phase transfer catalysts

1977-05-31

1979-02-20

Lovering, Richard D.

Chemistry: fertilizers

Processes and products

Forms or conditioning

71 64F, 71100, 71118, 71DIG1, 252316, 424 19, 424 32, A01N 900, A01N 1700, B01J 1302

Patent

active

041405161

ABSTRACT:
An improved encapsulation process to prepare encapsulated water-immiscible material employing an organic polyisocyanate intermediate to form discrete polyurea capsule enclosures around a water-immiscible material dispersed in an aqueous continuous phase said improvement comprising the addition of a catalytic amount of a phase transfer catalyst.

REFERENCES:
patent: 1112755 (1914-10-01), Bergstrom
patent: 3576760 (1971-04-01), Gould et al.
patent: 3577515 (1971-05-01), Vandegaer
patent: 3660304 (1972-05-01), Matsukawa
patent: 3701759 (1972-10-01), Lee et al.
patent: 3726804 (1973-04-01), Matsukawa et al.
patent: 4046741 (1977-09-01), Scher

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