Biocompatible polymer film
First Claim
1. A co-polymer film comprising a film-forming polymer component and a hydrophobic polymer block having reactive end groups, said film having a non-uniform surface characterized by domains of varied properties of hydrophobicity, roughness, hardness or other physico-chemically distinct patches, said domains having average diameters in the range 0.1 nm-100 nm, wherein the film-forming polymer is selected from the group consisting of polyurethanes, polyolefins, cellulosic polymers, polycarbonates, polyarylethersulfones, polysulfones, polyvinylchlorides, and polyamides, and the hydrophobic polymer block is selected from the group consisting of siloxane polymers, fluoropolymers, polyethyleneglycol-polydimethyl siloxane co-polymers, silicone polyesters and polylactone-polysiloxane-polylactone triblock co-polymers.
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Abstract
The present invention includes a co-polymer film which can be applied over a surface of an article to form a continuous surface that is more biocompatible and has a smoother surface morphology than an untreated article. In general the co-polymer film of the invention can be formed by providing a hydrophobic polymer block, such as polydimethylsiloxane (PDMS) with functional —OH end groups and reacting the —OH ends with a conventional monomer or prepolymer of a film-forming polymer capable of reacting with —OH groups. Such reactions are exemplified, using as reactive PDMS a triblock copolymer of the polylactone-polysiloxane-polylactone (PL-PDMS-PL) type, or silicone polyesters. The —OH groups of the polylactone blocks can react with any of a variety of isocyanates in a suitable solvent to form a polymer having PDMS incorporated with its structure. The film can be applied to the surface of an article by any convenient means of coating the article with the reaction mixture in solvent, and allowing the solvent to evaporate.
28 Citations
16 Claims
- 1. A co-polymer film comprising a film-forming polymer component and a hydrophobic polymer block having reactive end groups, said film having a non-uniform surface characterized by domains of varied properties of hydrophobicity, roughness, hardness or other physico-chemically distinct patches, said domains having average diameters in the range 0.1 nm-100 nm, wherein the film-forming polymer is selected from the group consisting of polyurethanes, polyolefins, cellulosic polymers, polycarbonates, polyarylethersulfones, polysulfones, polyvinylchlorides, and polyamides, and the hydrophobic polymer block is selected from the group consisting of siloxane polymers, fluoropolymers, polyethyleneglycol-polydimethyl siloxane co-polymers, silicone polyesters and polylactone-polysiloxane-polylactone triblock co-polymers.
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5. A method of making a co-polymer film comprising the steps of:
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a) combining a film-forming polymer component and a hydrophobic polymer block having end groups reactive with the film-forming polymer component in the presence of a solvent such that all components are dissolved in the solvent, wherein the film-forming polymer is selected from the group consisting of polyurethanes, polyolefins, cellulosic polymers, polycarbonates, polyarylethersulfones, polysulfones, polyvinylchlorides, and polyamides, and the hydrophobic polymer block is selected from the group consisting of siloxane polymers, fluoropolymers, polyethylenealycol-polydimethyl siloxane co-polymers, silicone polyesters and polylactone-polysiloxane-polylactone triblock co-polymers;
(b) applying the components dissolved in the solvent to a surface to be coated; and
(c) forming a film over the surface to be coated under conditions that allow the solvent to evaporate and the components to react with one another, whereby a co-polymer film having a non-uniform surface characterized by domains of varied properties of hydrophobicity, roughness, hardness or other physico-chemically distinct patches, and said domains having average diameters in the range 0.1 nm-100 nm, is obtained. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A method of coating a surface with a biocompatible co-polymer film comprising the steps of:
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(a) covering the surface with a solution comprising a film-forming polymer component and a hydrophobic polymer block component having end groups reactive with the film-forming polymer component, the components being dissolved in a solvent, wherein the film-forming polymer is selected from the group consisting of polyurethanes, polyolefins, cellulosic polymers, polycarbonates, polyarylethersulfones, polysulfones, polyvinylchlorides, and polyamides, and the hydrophobic polymer block is selected from the group consisting of siloxane polymers, fluoropolymers, polyethyleneglycol-polydimethyl siloxane co-polymers, silicone polyesters and polylactone-polysiloxane-polylactone triblock co-polymers; and
(b) removing the solvent from the solution covering the surface to allow the components react with one another, whereby a co-polymer film having a non-uniform surface characterized by domains of varied properties of hydrophobicity, roughness, hardness or other physico-chemically distinct patches, and said domains having average diameters in the range 0.1 nm-100 nm, is formed on the surface. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification