EP0627474A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Aqueous silicone coating compositions, method of coating substrates and coated surgical needles
Assignee: Covidien AG
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Filing: 1994-04-22
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Granted: —
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Expires: 2014-04-22
Abstract
Abstract An aqueous silicone coating composition containing a reactive siloxane polymer and a non-reactive dimethylpolysiloxane in an aqueous carrier having an effective amount of at least one dispersing agent to disperse the siloxanes throughout the aqueous carrier. Also provided is a method of lubricating substrates by applying an aqueous silicone coating composition to the substrate and curing the silicone thereon, as well as lubricated surgical needles prepared by that method.
Inventors
- 👤 Janniah S. Prasad
- 👤 Dario Vitali
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 08:35
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; A; A61; A61L; A61L31/00; A61L31/08; A61L31/10; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32; C09; C09D; C09D183/00; C09D183/04; A61B; A61B17/00; A61B17/04; A61B17/06; A61B17/06066; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
34 words
A silicone coating composition comprising an aqueous solution of a non-reactive polydimethylsiloxane, a reactive siloxane polymer and an effective amount of at least one dispersing agent to disperse said siloxanes throughout the aqueous solution.
Claim 2
Dependent Claim
17 words
The coating composition of claim 1 wherein the reactive siloxane polymer comprises at least one copolymerizable siloxane.
Claim 3
Dependent Claim
53 words
The coating composition of claim 1, wherein the silicone in said coating composition is in a range of from about 0.5 to 20 percent by weight of the composition and/or the aqueous mixture contains an amount of water in the range of about 65 to about 97 weight percent of the total composition.
Claim 4
Independent Claim
55 words
A method for lubricating a substrate with silicone comprising applying an aqueous silicone coating composition to the surface of the substrate and curing the silicone thereon, wherein the aqueous silicone coating composition is an aqueous silicone polymer and an amount of at least one dispersing agent effective to disperse said siloxane throughout the aqueous mixture.
Claim 5
Dependent Claim
18 words
The method of claim 4 wherein the siloxane polymer is a non-reactive polydimethylsiloxane and/or a reactive siloxane polymer.
Claim 6
Dependent Claim
48 words
The coating composition of claim 1 or 2, or the method of claim 5 wherein the dispersing agent is selected from the group consisting of propylene glycol, an octylphenoxy polyethoxyethanol of the formula: wherein n is in the range of about 5 to 15 and a mixture thereof.
Claim 7
Dependent Claim
32 words
The method of claim 6 wherein the curing step is performed at a temperature in the range of about 80 to 200 °C for a time of about 0.5 to 6 hours.
Claim 8
Dependent Claim
12 words
The method of claim 4 wherein the substrate is a surgical needle.
Claim 9
Dependent Claim
18 words
The method of claim 8, wherein the aqueous silicone coating composition is applied by spraying or ultrasonic atomization.
Claim 10
Dependent Claim
29 words
The method of claim 4, wherein the silicone in the aqueous silicone composition is in a range of from about 0.5 to 20 percent by weight of the composition.
Claim 11
Dependent Claim
11 words
A lubricated surgical needle prepared by the method of claim 4.
References Cited (Backward Citations)
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