Process for producing a low water content PVA hydrogel

Details Process for producing a low water content PVA hydrogel Process for producing a low water content PVA hydrogel

1989-04-26

1991-01-29

Schofer, Joseph L.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

525 61, C08L 2904

Patent

active

049887610

ABSTRACT:
The present invention relates to a method of producing polyvinyl alcohol hydrogel characterized by the following features: the production process consists of a low-temperature processing stage in which the solution of polyvinyl alcohol with a polymerization degree over 1200 is processed at a low temperature so that polyvinyl alcohol is gelated, and a high-temperature processing stage in which the polyvinyl alcohol gelated int he low-temperature processing stage is dried, then processed at higher than 100.degree. C.; in this way, polyvinyl alcohol hydrogel with a saturated water content lower than 40 wt % is obtained. The hydrogels of this invention are useful for providing improved artificial articular cartilage for replacement of cartilage in the human body.

REFERENCES:
patent: 4663358 (1987-05-01), Hyon et al.
patent: 4734097 (1988-03-01), Tanabe et al.
patent: 4808353 (1989-02-01), Nambu et al.
Hydrogels in Medicine and Pharmacy, vol. III, Properties and Applications, Nikolaos A. Peppas, Professor, CRC Press, Inc., Boca Raton, FL.

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