Expanding-contracting hydrogel composite and process for prepara

Details Expanding-contracting hydrogel composite and process for prepara Expanding-contracting hydrogel composite and process for prepara

1989-05-19

1992-12-15

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 59, 525 60, C08L 2904

Patent

active

051717751

ABSTRACT:
A process is provided for the preparation of expanding-contracting hydrogel composites which process comprises the steps of adding solid particles of a polyelectrolyte to a polyvinyl alcohol solution and subjecting the mixture to a low temperature treatment to cause gelation of the polyvinyl alcohol with the polyelectrolyte dispersed as a heterogeneous phase (i.e. solid particles) within the polyvinyl alcohol gel. Hydrogel composites made by the process exhibit high strength and a capacity to expand and contract over a wide range with changes in environment.

REFERENCES:
patent: 4310593 (1982-01-01), Gross
patent: 44444830 (1984-04-01), Erickson
patent: 4663358 (1987-05-01), Hyon et al.
patent: 4888364 (1989-12-01), Graiver et al.
Graiver et al, Polymer Science Preprints, Japan, The Society of Polymer Science, vol. 36, E171-173, Oct. 21-24 (1987) Nos. 5-10.

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