Hydrogel composition and methods of making it

Details Hydrogel composition and methods of making it Hydrogel composition and methods of making it

C - Chemistry, Metallurgy

08

L

C08L 29/04 (2006.01) A61L 15/22 (2006.01) A61L 15/60 (2006.01) C08F 8/14 (2006.01) C08J 3/24 (2006.01) C08L 33/02 (2006.01) C08L 35/08 (2006.01)

Patent

CA 2103846

ABSTRACT The invention provides a translucent, water-insoluble hydrogel composition and methods of making it. The hydrogel composition comprises a polyvinyl alcohol polymer and a complexing agent which are physically crosslinked to form a semi-crystalline polyvinyl alcohol-complexing agent polymer complex. This is achieved by: (i) combining a polyvinyl alcohol polymer with a suitable aprotic solvent; (ii) Adding a complexing agent to (i) to form a water soluble complex with the polyvinyl alcohol polymer; and (iii) Allowing the polyvinyl alcohol polymer and the complexing agent to form a water-insoluble, semi-crystalline structure. The formation of the semi-crystalline structure is assisted by freezing the polyvinyl alcohol/complexing agent/polar aprotic solvent mixture.

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