Patent EP0454293A2 successfully refreshed from Google Patents.
EP0454293A2
Expired / Lapsed
EP
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Flexible lubricious organic coatings
Assignee: Medtronic Vascular Inc
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Filing: 1991-03-05
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Granted: —
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Expires: 2011-03-05
Abstract
Abstract A flexible, lubricious organic polymeric coating is formed by applying a mixture of an isocyanate, a polyol, poly(ethylene oxide), and carrier liquid to a surface to be coated. The carrier liquid is removed and the mixture reacted to form a polyurethane coating with associated poly(ethylene oxide) giving a highly lubricious, abrasion resistant, flexible coating particularly suitable for use as a protective lubricious coating on devices introduced into the body.
Inventors
- 👤 Richard K. Elton
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 14:15
CPC Classifications
A; A61; A61L; A61L29/00; A61L29/08; A61L29/085; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0847; C08G18/0852; C08G18/0857; C08G18/28; C08G18/30; C08G18/36; C08G18/40; C08G18/4009; C08G18/4018; C08G18/48; C08G18/4833; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8009; C08G18/8022; C08G18/8029; C09; C09D; C09D175/00; C09D175/04; A61L2400/00; A61L2400/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
48 words
An abrasion resistant, hydrophilic lubricious, organic coating formed from the reaction an a surface to be coated, of a mixture containing, an isocyanate, a polyol and a poly(ethylene oxide) in a carrier liquid to form a polyurethane coating having good adherence to the substrate and good anti-friction properties.
Claim 2
Dependent Claim
30 words
An abrasion resistant coating in accordance with claim 1, wherein the ratio by weight of isocyanate and polyol to poly(ethylene oxide) is in the range of from 0.25 to 6.0.
Claim 3
Dependent Claim
21 words
An abrasion resistant coating in accordance with claim 2 wherein said ratio is in the range of from 0.75 to 2.0.
Claim 4
Dependent Claim
29 words
An abrasion resistant coating in accordance with claim 1 wherein the stoichimetric ratio of total NCO groups to total OH groups in said mixture varies from .6 to 3.5.
Claim 5
Dependent Claim
28 words
An abrasion resistant coating in accordance with claim 5 wherein said poly(ethylene oxide) has a mean molecular weight in the range of from about 50,000 to about 5,000,000.
Claim 6
Independent Claim
71 words
A method of preparing an abrasion resistant hydrophilic lubricious, organic coating on an organic substrate to be coated, said method comprising forming a mixture of an isocyanate, a polyol and a poly(ethylene oxide) in a carrier liquid, removing at least a portion of said carrier liquid, and heating and curing to form a coating of a polyurethane complexed with poly(ethylene oxide) having good adherence to the substrate and good anti-friction properties.
Claim 7
Dependent Claim
36 words
A method of forming an abrasion resistant coating in accordance with claim 6 wherein said mixture has a stoichimetric ratio of total NCO groups to total OH groups in the range of from .6 to 3.5.
Claim 8
Dependent Claim
24 words
A method in accordance with claim 7 wherein said carrier liquid is an organic solvent capable of solubilizing said polyol, isocyanate and poly(ethylene oxide).
Claim 9
Independent Claim
86 words
A method of preparing an abrasion resistant, hydrophilic, lubricious organic coating comprising, forming a reaction mixture containing an isocyanate, a polyol and a poly(ethylene oxide) having a molecular weight in the range of from 50,000 to 5,000,000, said mixture being dissolved in a solvent to form a uniform solution, applying said solution to an organic substrate to form a coating, removing said solvent, and curing said coating to allow said polyol and isocyanate to react to form a cross-linked polyurethane matrix associated with the poly(ethylene oxide).
Claim 10
Dependent Claim
34 words
A method in accordance with the method of claim 9 wherein said curing is carried out at a temperature of 70°F to 350°F for a time period of from 2 minutes to 72 hours.
Claim 11
Dependent Claim
22 words
A method in accordance with the method of claim 9 wherein said substrate is a catheter and said coating overlies said catheter.
Claim 12
Dependent Claim
25 words
A method in accordance with the method of claim 11 wherein isocyanate and polyol have a ratio to poly(ethylene oxide) of from 0.25 to 6.0.
References Cited (Backward Citations)
No citation records indexed.
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