Cold water-insoluble polyvinyl alcohol pouch for the controlled

Details Cold water-insoluble polyvinyl alcohol pouch for the controlled Cold water-insoluble polyvinyl alcohol pouch for the controlled

1981-05-08

1982-07-20

Hess, Bruce H.

Liquid purification or separation

Processes

Chemical treatment

8101, 8137, 43124, 53416, 53477, 206 05, 210749, 210754, 239 6, 239 34, 239 55, 422 28, 422 37, 424 19, 428 35, 4283054, 4283055, 4283099, 428500, 428522, B65D 120, B65D 1120, C02B 306

Patent

active

043404910

ABSTRACT:
A pouch for the controlled release of active ingredients into an aqueous medium comprising liquid or solid active ingredients enclosed in a sealed envelope of cold water-insoluble polyvinyl alcohol.

REFERENCES:
patent: 3977404 (1976-08-01), Theeuves
patent: 4011172 (1977-03-01), Marsan et al.
patent: 4170565 (1979-10-01), Flesher et al.
patent: 4188304 (1980-02-01), Clarke et al.

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