Process for manufacturing microcapsules of polyvinyl alcohol wit

Details Process for manufacturing microcapsules of polyvinyl alcohol wit Process for manufacturing microcapsules of polyvinyl alcohol wit

1979-02-05

1981-01-13

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

8526, 71 64F, 252182, 2521883R, 252385, 252388, 424 19, 424 33, B01J 1302

Patent

active

042448360

ABSTRACT:
Microcapsules having a shell consisting of water-soluble polyvinyl alcohol and containing a liquid, water-in-soluble material are obtained by dispersing a liquid, water-insoluble phase of a substance, substance mixture or substance solution in an aqueous phase of polyvinyl alcohol obtained by partial hydrolysis of polyvinyl acetate and having a degree of hydrolysis of from 72 to 99 mol % and dehydrating the dispersion to obtain the capsules in powder form.

REFERENCES:
patent: 3323922 (1967-06-01), Durst
patent: 3582495 (1971-06-01), Emrick
patent: 3584113 (1971-06-01), Takebe et al.
patent: 3627693 (1971-12-01), Scarpelli
patent: 3664963 (1972-05-01), Pasin
Angewandte Chemie International Edition in English, vol. 14, (1975) No. 8, pp. 541, 542, 547 and 548.

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