US5494756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for wet chemical surface modification of formed polysiloxane products and coated substrates silicones
Assignee: General Electric Co
•
Filing: 1993-05-14
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Granted: 1996-02-27
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Expires: 2013-05-14
Abstract
Abstract A procedure is described for wet chemical surface modification of formed articles and substrates coated with made of organopolysiloxanes: the articles formed were contacted with metal hydroxide solutions to tailor the binding capacity for ions, particularly metal ions, bivalent cations, organic macro anions, and organic macro cations, e.g. proteins. The procedure creates organopolysiloxane surfaces which are better wettable, have reduced surface resistance, are less sticky, are smoother and more biocompatible.
Inventors
- 👤 Rolf Siegel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:05
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J2383/00; C08J2383/04; Y; Y10; Y10S; Y10S385/00; Y10S385/90; Y10S428/00; Y10S428/907; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
42 words
A method for modifying the surface of an organopolysiloxane article comprising: 1)contacting the surface of the article with a solution or suspension of a metal hydroxide whereby the surface becomes charged and 2) contacting the surface with an ion-containing solution or suspension.
Claim 2
Independent Claim
42 words
A method for modifying the surface of an organopolysiloxane article comprising: 1)contacting the surface of the article with a solution or suspension of a metal hydroxide whereby the surface becomes charged and 2) contacting the surface with an ion-containing solution or suspension.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the metal hydroxide is in solution.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein the metal hydroxide is in suspension.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein the surface is contacted with an ion-containing solution.
Claim 6
Independent Claim
14 words
The method of claims 1 wherein the surface is contacted with an ion-containing suspension.
Claim 7
Dependent Claim
15 words
The method of claim 1 wherein after 1) but before 2) the surface is washed.
Claim 8
Independent Claim
30 words
The method of claims 1 wherein the method comprises the additional steps of 3) washing the surface and then 4) contacting the surface with a different ion-containing solution or suspension.
Claim 9
Dependent Claim
42 words
The method of claim 1 wherein the ion-containing solution or suspension is tap water, sea-water, salt solutions or solutions or suspensions of aminoacids, oligopeptides, peptides, lipopeptides, lipoproteins, glyco proteins, proteins, dyes, pharmaceuticals or carboxylate, phosphate, sulfate, sulfonate or ammonium groups containing polyols.
Claim 10
Dependent Claim
12 words
The method of claim 1 wherein the article is a molded part.
Claim 11
Dependent Claim
12 words
The method of claim 1 wherein the article is an extruded profile.
Claim 12
Dependent Claim
11 words
The method of claim 1 wherein the article is a tubing.
Claim 13
Dependent Claim
11 words
The method of claim 1 wherein the article is a particle.
Claim 14
Dependent Claim
16 words
The method of claim 1 wherein the article is a coating of organopolysiloxane on a substrate.
Claim 15
Dependent Claim
12 words
The method of claim 13 wherein the coating is a resinous coating.
Claim 16
Dependent Claim
12 words
The method of claim 13 wherein the coating is an elastomeric coating.
Claim 17
Dependent Claim
13 words
The method of claim 13 wherein the coating is a silicone release coating.
Claim 18
Dependent Claim
12 words
The method of claim 13 wherein the coating is an antifoulant coating.
Claim 19
Dependent Claim
8 words
A product of the method of claim 1.
Claim 20
Dependent Claim
17 words
The product of claim 18 which is a medical device for use in contact with body fluids.
Claim 21
Dependent Claim
11 words
The product of claim 18 which is a cell culture substrate.
Claim 22
Dependent Claim
13 words
The product of claim 18 which is a substrate for solid phase diagnostics.
Claim 23
Dependent Claim
9 words
The product of claim 18 which is a catalyst.
Claim 24
Dependent Claim
14 words
The product of claim 18 which is a light collecting system or light conductor.
Claim 25
Dependent Claim
13 words
The product of claim 18 which is a shield against an electromagnetic field.
Claim 26
Dependent Claim
18 words
The product of claim 18 which is a polymer material with a surface resistivity below 10 8 Ohms.
Claim 27
Dependent Claim
8 words
The product of claim 18 which is dirt-resistant.
Claim 28
Dependent Claim
10 words
The product of claim 26 which is a dirt-resistant coating.
Claim 29
Dependent Claim
10 words
The product of claim 26 which is a dirt-resistant part.
Claim 30
Dependent Claim
11 words
The product of claim 18 which is a silicone release coating.
Claim 31
Dependent Claim
10 words
The product of claim 18 which is an antifoulant coating.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-02-26 | 1999-08-28 | 2000-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-26 | 2003-08-28 | 2004-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-26 | 2007-08-28 | 2008-02-27 | $7700.00 | Window Closed / Lapsed |