Porous and transparent poly(vinyl alcohol) gel and method of man

Details Porous and transparent poly(vinyl alcohol) gel and method of man Porous and transparent poly(vinyl alcohol) gel and method of man

1986-04-25

1987-05-05

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 61, 521 66, 521 82, 521 88, 521 89, 521141, C08J 928

Patent

active

046633588

ABSTRACT:
A porous and transparent hydrated gel is prepared from a poly(vinyl alcohol) solution in a mixed solvent consisting of water and an water-miscible organic solvent. Upon cooling the poly(vinyl alcohol) solution below room temperature, a gel is formed as a consequence of crystallization of poly(vinyl alcohol) molecules. Exchange of the organic solvent included in the gel with water produces a hydrated gel of poly(vinyl alcohol) which has a high tensile strength, a high water content, and a high light transmittance.

REFERENCES:
patent: 3318856 (1967-05-01), Derup
patent: 3481888 (1969-12-01), Sinclair
patent: 3492250 (1970-01-01), Derup

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