Process for the production of microcapsules

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

1980-03-10

1982-10-12

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

4283206, 4283208, 528914, B01J 1302

Patent

active

043538096

ABSTRACT:
Microcapsules with a melamine-formaldehyde or urea-formaldehyde resin capsule shell are produced by adding in advance a polyvalent isocyanate, a polyvalent isothiocyanate or a prepolymer thereof to the hydrophobic oily liquid to be encapsulated, emulsifying the hydrophobic oily liquid in an aqueous solution of a water-soluble polymer, adding an aqueous solution of melamine and formaldehyde or a precondensate thereof or urea and formaldehyde to the emulsion, and polymerizing the melamine and formaldehyde or a precondensate thereof or the urea and formaldehyde.

REFERENCES:
patent: 3897361 (1975-07-01), Saeki et al.
patent: 4001140 (1977-01-01), Foris et al.
patent: 4089802 (1978-05-01), Foris et al.
patent: 4138362 (1979-02-01), Vassiliades et al.

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