Water-soluble film or sheet

Details Water-soluble film or sheet Water-soluble film or sheet

1984-09-17

1985-07-09

Kight, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528301, 528405, C08G 6342, C08G 6366, C08G 5900

Patent

active

045283605

ABSTRACT:
A water-soluble film or sheet made of a polyoxyalkylene compound having an average molecular weight of at least 50,000 produced by linking chains of a polyether having an average molecular weight of at least 3,000 and an oxyethylene unit content of at least 70% by weight with each other through ester linkages by reaction of the polyether and a polycarboxylic acid, its anhydride or its lower alkyl ester. The film or sheet is also soluble in organic solvents and has properties comparable or superior to known water-soluble polymer films or sheets.

REFERENCES:
patent: 2687430 (1951-08-01), Snow et al.
patent: 3293193 (1966-12-01), Krahler et al.
patent: 3723390 (1973-03-01), Carpenter et al.
J. Furukawa et al., Polymerization of Aldehydes and Oxides, Interscience Publishers, pp. 130-141, 1963.

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