Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
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
Hyon Suong-Hyu
Ikada Yoshito
Biomaterials Universe Inc.
Foelak Morton
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