Process for the microcapsulation of organophosphoric acid deriva

Details Process for the microcapsulation of organophosphoric acid deriva Process for the microcapsulation of organophosphoric acid deriva

1978-04-05

1980-08-12

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

424 32, 424 33, 424 34, 424 37, 424219, B01J 1302

Patent

active

042172411

ABSTRACT:
The invention relates to a process for the preparation of microcapsules of organo-phosphoric acid derivative as capsule core. The derivative has a partial mutual solubility with water. The main feature of the invention is the provision of an inner provisional solid capsule shell of a high molecular hydrophobic substance, such as polymethyl methacrylate. This substance is liable to form a shell on each of the droplets by sedimenting under aqueous condition, while it is capable of dissolving into the capsule core substance, when subject to non-aqueous condition which is established after formation of a permanent outer shell on the provisional shell of each capsule. The provisional shell-forming substance is polymethyl methacrylate, polystyrene, polyvinyl chloride or polyvinyl acetate.

REFERENCES:
patent: 3551346 (1970-12-01), Breen et al.
patent: 3576760 (1971-04-01), Gould et al.
patent: 3691090 (1972-09-01), Kitajima et al.
patent: 3737337 (1973-06-01), Schnoring et al.

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