Polymer blends with high water absorption
AssigneeMinnesota Mining and Manufacturing Company
InventorRonald F. Ofstead
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Abstract
Miscible blends of solids, non-crosslinked polymers are disclosed. The blends comprise from 2 to 95 parts by weight of a water-insoluble, hydrophobic polymer and, correspondingly from 98 to 5 parts by weight of a hydrophilic polymer. The blends are capable of absorbing at least their own weight in water.
Claims11
A composition comprising a miscible blend of non-crosslinked polymers comprising from about 2 to 95 parts by weight of a water-insoluble, hydrophobic polymer and, correspondingly from about 98 to 5 parts by weight of a hydrophilic polymer, wherein said hydrophobic polymer and said hydrophylic polymer are not covalently bonded to each other said composition being transparent and capable of absorbing a sufficient quantity of water to provide a hydrated material containing at least 50% by weight water.
A solid article comprising a miscible blend of non-crosslinked polymers comprising from about 2 to 95 parts by weight of a water-insoluble, hydrophobic polymer and from about 98 to 5 parts by weight of a hydrophilic polymer wherein said hydrophobic polymer and said hydrophylic polymer are not covalently bonded to each other said blend being transparent and capable of absorbing a sufficient quantity of water to provide a hydrated material containing at least 50% by weight water.
Dependencies are inferred from the claim text.