Water soluble film

Details Water soluble film Water soluble film

1991-07-29

1992-04-07

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

26433112, C08F 1606

Patent

active

051029502

ABSTRACT:
Provided are water soluble films comprising a modified polyvinyl alcohol containing 2-pyrrolidone ring. The films have excellent water solubility, which can be maintained over a long period of time and under the condition of being contacted with an alkaline or acid substance, and at the same time have an appropriate touch and flexibility.

REFERENCES:
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patent: 3223687 (1965-12-01), Crowe
patent: 3374195 (1968-03-01), Bianco et al.
patent: 3677990 (1972-07-01), Barabas et al.
patent: 4162242 (1979-07-01), House
patent: 4251400 (1981-02-01), Columbus
patent: 4323492 (1982-04-01), Zimmermann et al.
patent: 4383065 (1983-05-01), Woo et al.
patent: 4469837 (1984-09-01), Cattaneo

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