Medical device having wet lubricity and method for its production
First Claim
1. A medical device having a surface exhibiting lubricity with wet wherein the medical device has a surface lubrication layer formed on the substrate constituting the medical device, and said surface lubrication layer comprises a reaction product of a hydrophilic high molecular weight compound having at least one selected from a group consisting a carbonyl group and a hydrazine residue in the molecule and a cross-linking agent having at least two carbonyl groups or hydrazine residues which are capable of reacting with the carbonyl group or the hydrazine residue in one molecule.
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Accused Products
Abstract
A highly safe medical device which exhibits long-lasting low surface friction in a body fluid or in an aqueous medium is provided. Also provided is a method for producing such medical device wherein substantially no limitation is imposed on the type of the substrate used, and the hydrophilic high molecular weight compound or the water-soluble or water-swellable high molecular weight compound responsible for the surface lubricity can be readily coated on the surface. In the present invention, a hydrophilic high molecular weight compound having at least one carbonyl group or hydrazine residue in the molecule and a cross-linking agent having at least two hydrazine residues or carbonyl groups in the molecule are reacted to thereby form a surface lubrication layer comprising the reaction product. In another embodiment, an interpenetrating network is formed between the reaction product of a compound having at least one carbonyl group or hydrazine residue in the molecule and a cross-linking agent, and a water-soluble or water-swellable high molecular weight compound to thereby form a surface lubrication layer.
74 Citations
17 Claims
- 1. A medical device having a surface exhibiting lubricity with wet wherein the medical device has a surface lubrication layer formed on the substrate constituting the medical device, and said surface lubrication layer comprises a reaction product of a hydrophilic high molecular weight compound having at least one selected from a group consisting a carbonyl group and a hydrazine residue in the molecule and a cross-linking agent having at least two carbonyl groups or hydrazine residues which are capable of reacting with the carbonyl group or the hydrazine residue in one molecule.
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6. A medical device having a surface exhibiting lubricity with wet wherein the medical device has a surface lubrication layer formed on the substrate constituting the medical device, and said surface lubrication layer has an interpenetrating network comprising a reaction product of a carbonyl group-containing compound having at least one carbonyl group in the molecule with a hydrazide compound having at least two hydrazine residues in one molecule and a water-soluble or water-swellable high molecular weight substance.
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7. A medical device having a surface exhibiting lubricity with wet wherein the medical device has a surface lubrication layer formed on the substrate constituting the medical device, and said surface lubrication layer has an interpenetrating network comprising a reaction product of a hydrazide compound having at least one hydrazine residue in the molecule with a carbonyl group-containing compound having at least two carbonyl groups in one molecule and a water-soluble or water-swellable high molecular weight substance.
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8. A method for producing a medical device having a surface exhibiting lubricity with wet comprising the steps of:
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coating the surface of the substrate constituting the medical device with a solution containing a hydrophilic high molecular weight compound having at least one carbonyl group in the molecule, and coating the surface with a solution containing a cross-linking agent comprising a hydrazide compound having at least two hydrazine residues in one molecule. - View Dependent Claims (9, 10, 11)
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12. A method for producing a medical device having a surface exhibiting lubricity with wet comprising the steps of:
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coating the surface of the substrate constituting the medical device with a solution containing a hydrophilic high molecular weight compound having at least one hydrazine residue in the molecule, and coating the surface with a solution containing a cross-linking agent comprising a carbonyl group-containing compound having at least two carbonyl groups in one molecule. - View Dependent Claims (13, 14, 15)
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16. A method for producing a medical device having a surface exhibiting lubricity with wet comprising the steps of:
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coating the surface of the substrate constituting the medical device with a solution containing a carbonyl group-containing compound having at least one carbonyl group in the molecule, and coating the surface with a solution containing a hydrazide compound having at least two hydrazine residues in one molecule;
wherein at least one of said solution containing the carbonyl group-containing compound and said solution containing the hydrazide compound further comprises a water-soluble or water-swellable high molecular substance.
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17. A method for producing a medical device having a surface exhibiting lubricity with wet comprising the steps of:
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coating the surface of the substrate constituting the medical device with a solution containing a hydrazide compound having at least one hydrazine residue in the molecule, and coating the surface with a solution containing a cross-linking agent comprising a carbonyl group-containing compound having at least two carbonyl groups in one molecule;
wherein at least one of said solution containing the carbonyl group-containing compound and said solution containing the hydrazide compound further comprises a water-soluble or water-swellable high molecular substance.
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Specification