Blend hydrogels and methods of making
First Claim
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1. A water-swellable material comprising a non-adhesive blend of a) at least one hydrophilic polymer;
- and b) at least one polymer or oligomer having hydrophobic and hydrophilic recurring units, wherein the blend is effective to phase separate and is immiscible in the presence of water and wherein the blend is at least partially physically cross-linked.
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Abstract
The present invention provides blend water-swellable materials and hydrogels suitable for use in biomedical or other applications. The blend water swellable materials and hydrogels have at least one hydrophilic polymer and at least one other polymer or oligomer having both hydrophobic and hydrophilic recurring units where the blend phase separates and is opaque and immiscible in the presence of water. Methods of making these blend water-swellable materials and hydrogels are also described.
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Citations
14 Claims
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1. A water-swellable material comprising a non-adhesive blend of a) at least one hydrophilic polymer;
- and b) at least one polymer or oligomer having hydrophobic and hydrophilic recurring units, wherein the blend is effective to phase separate and is immiscible in the presence of water and wherein the blend is at least partially physically cross-linked.
- View Dependent Claims (2, 3, 4, 5, 6)
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7. A water-swellable material comprising a non-adhesive blend of a) at least one hydrophilic polymer;
- b) at least one polymer or oligomer having hydrophobic and hydrophilic recurring units, and (c) a plasticizer, wherein the blend is effective to phase separate and is immiscible in the presence of water, and wherein the blend is at least partially physically cross-linked.
- View Dependent Claims (8, 9)
- 10. A hydrogel in hydrated form comprising a non-adhesive, phase separated blend of polymers comprising poly(vinyl alcohol) and a polymer having hydrophobic and hydrophilic recurring units, wherein the blend is at least partially cross- linked.
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14. A water-swellable material comprising a non-adhesive, physically cross-linked blend of a) at least one hydrophilic polymer;
- and b) at least one polymer or oligomer having hydrophobic and hydrophilic recurring units, wherein the non-adhesive, physically cross-linked blend is effective to phase separate and is immiscible in water.
Specification