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EP0370657A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Non-Crosslinked crystallized polymer coatings

Assignee: 3M Co
•
Filing: 1989-11-08
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Granted: —
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Expires: 2009-11-08
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Abstract

Abstract A non-crosslinked crystallized polymer or polymer blend coating is disclosed for articles that come into contact with bodily fluids. The polymer or polymer blend to be used is crystallizable and is stable in the presence of water at temperatures of up to about 60°C. when in the crystalline state. The polymer or polymer blend is dissolved in a solvent, such as water or dimethyl sulfoxide (DMSO), and is coated on the article. The polymer coating is then crystallized, generally by heat treatment, providing both toughness and increased adherence of the coating to the article without ready dissolution when the article comes into contact with fluids.

Inventors

  • 👤 Ronald F. C/O Minnesota Mining And Ofstead

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-10 02:30
CPC Classifications
A; A61; A61L; A61L33/00; A61L33/0005; A61L33/0011; A61L33/0029; A61L27/00; A61L27/28; A61L27/34; A61L29/00; A61L29/08; A61L29/085; A61L31/00; A61L31/08; A61L31/10

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 60 words
A coating on an article that comes into contact with body fluids which comprises a non-crosslinked, crystallized polymer or polymer blend that is soluble before crystallization in a solvent at temperatures less than about 100°C., is capable of being crystallized and is stable in the presence of water at temperatures of up to about 60°C. when in the crystalline state.
Claim 2
Dependent Claim 60 words
A coating on an article that comes into contact with body fluids which comprises a non-crosslinked, crystallized polymer or polymer blend that is soluble before crystallization in a solvent at temperatures less than about 100°C., is capable of being crystallized and is stable in the presence of water at temperatures of up to about 60°C. when in the crystalline state.
Claim 3
Dependent Claim 12 words
A coating of claim 1, wherein the polymer is a poly(vinyl alcohol).
Claim 4
Dependent Claim 17 words
A coating of claim 2 wherein the poly(vinyl alcohol) polymer is more than 88% hydrolyzed before crystallization.
Claim 5
Dependent Claim 20 words
The coating of claim 3 wherein the poly(vinyl alcohol) polymer has a molecular weight of about 40,000 to about 126,000.
Claim 6
Dependent Claim 18 words
An article that comes into contact with bodily fluids which is coated by a coating of claim 1.
Claim 7
Dependent Claim 12 words
An article of claim 5, wherein the polymer is a poly(vinyl alcohol).
Claim 8
Dependent Claim 9 words
An article of claim 6 which is a guidewire.
Claim 9
Dependent Claim 21 words
The article of claim 6 wherein the polymer has a degree of crystallinity of between about 30 and about 50 percent.
Claim 10
Dependent Claim 41 words
The method of making an article that comes into contact with bodily fluids which is coated by a coating of claim 1 which comprises coating the article with a poly(vinyl alcohol) polymer and crystallizing said polymer by exposing it to heat.

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