IP Library › Granted Patent US 9,433,534
Granted Patent B2
US 9,433,534 · App. 14/111,626 · Granted Sep 6, 2016

Patterned silicone coating

Inventors: Deborah Addison (Keasden, GB); Sally Stephens (Skipton, GB); Risham Amjad (Manchester, GB); Patrick Brosnan (West Yorkshire, GB); Gary Street (West Yorkshire, GB); Ian Teet (Kelbrooke, GB)
Assignee: KCI USA, INC.
A61F13/025A61F13/0276A61F13/0283B05D1/28C09J5/06Y10T428/24802
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Quick Facts
Patent No.
US 9,433,534
App. No.
14/111,626
Granted
Sep 6, 2016
Kind
B2
Abstract

A method of applying a patterned coating of a silicone adhesive to a substrate sheet, comprising the steps of pattern coating a silicone precursor composition onto the substrate, followed by thermally curing the precursor composition coated on the substrate. The precursor composition is a viscous fluid, and the pattern coating is performed by suitably modified block printing, intaglio printing or screen printing methods. Also provided are coated substrates obtainable by the methods of the invention, and wound dressings comprising such coated substrates.

Claims (9)

1. A method of applying a patterned coating of a silicone adhesive to a substrate sheet, comprising the steps of pattern coating a silicone precursor composition onto at least a portion of the substrate sheet, followed by thermally curing the precursor composition coated on the portion of the substrate sheet, wherein the step of pattern coating comprises the steps of coating the silicone precursor composition onto an apertured support layer to provide a coated apertured support layer, followed by applying the coated apertured support layer to the substrate sheet, followed by thermally curing the silicone precursor composition, followed by removing the coated apertured support layer to leave a patterned layer of the cured silicone composition on the substrate sheet, whereby the pattern of the cured silicone on the substrate sheet substantially corresponds to a pattern of coating on the apertured support layer.

2. A method according to claim 1 , wherein the pattern of coating is formed by a pattern of lands and holes in the support layer.

3. A method according to claim 1 , wherein said apertured support layer is a perforated sheet containing an array of perforations, said perforations having an area of at least about 4 mm 2 .

4. A method according to claim 1 , wherein the silicone precursor composition is substantially solvent-free.

5. A method according to claim 1 , wherein said pattern coating of silicone precursor composition is applied to cover from about 10% to about 50% of the surface area of the substrate sheet.

6. A method according to claim 1 , wherein said coating of silicone adhesive precursor composition is applied in a pattern having a minimum dimension of about 2 mm.

7. A method according to claim 1 , wherein said substrate sheet is a continuous semipermeable sheet having a moisture vapour transfer rate (MVTR) before coating of at least about 500 g/m 2 /24 hr.

8. A method according to claim 1 , wherein no primer layer is applied to said substrate sheet prior to said step of pattern coating with the silicone precursor composition.

9. A method according to claim 1 , wherein the support layer has a surface that substantially comprises a perfluorocarbon.

Assignments (9)
RELEASE OF SECURITY INTEREST IN PATENTS Recorded Nov 7, 2019
From: WILMINGTON TRUST, NATIONAL ASSOCIATION
To: KCI USA, INC.; KCI LICENSING, INC.
Reel/Frame 050966/0547 →
RELEASE OF SECURITY INTEREST IN PATENTS Recorded Nov 6, 2019
From: WILMINGTON TRUST, NATIONAL ASSOCIATION
To: KINETIC CONCEPTS, INC.; KCI USA, INC.; ACELITY L.P. INC.; CHIRON HOLDINGS, INC.; CHIRON TOPCO, INC.; KCI ANIMAL HEALTH, LLC; KCI HOLDING COMPANY, INC.; KCI HOMECARE, INC.; KCI IMPORTS, INC.; KCI INTERNATIONAL, INC.; KCI LICENSING, INC.; KCI PROPERTIES LIMITED; KCI REAL HOLDINGS, L.L.C.; KCI REAL PROPERTY LIMITED; KCI USA REAL HOLDINGS, L.L.C.; TECHNIMOTION, LLC
Reel/Frame 050945/0278 →
RELEASE OF SECURITY INTEREST Recorded Oct 11, 2019
From: BANK OF AMERICA, N.A.
To: KCI USA, INC.
Reel/Frame 050710/0955 →
RELEASE OF SECURITY INTEREST REEL/FRAME 040098/0268 Recorded Feb 8, 2017
From: WILMINGTON TRUST
To: KCI USA, INC.
Reel/Frame 041666/0320 →
SECURITY AGREEMENT Recorded Feb 7, 2017
From: KCI USA, INC., AS GRANTOR
To: BANK OF AMERICA, N.A., AS COLLATERAL AGENT
Reel/Frame 041650/0013 →
LIMITED THIRD LIEN INTELLECTUAL PROPERTY SECURITY AGREEMENT Recorded Oct 7, 2016
From: KCI USA, INC.; LIFECELL CORPORATION; KCI LICENSING, INC.
To: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 040291/0237 →
SECOND LIEN SECURITY AGREEMENT Recorded Sep 21, 2016
From: KCI USA, INC.; LIFECELL CORPORATION; KCI LICENSING, INC.
To: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 040098/0268 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 28, 2016
From: ADDISON, DEBORAH; STEPHENS, SALLY; BROSNAN, PATRICK JOSEPH; STREET, GARY; TEET, IAN; SYSTAGENIX WOUND MANAGEMENT LIMITED
To: KCI USA, INC.
Reel/Frame 038560/0925 →
SECURITY INTEREST Recorded Feb 17, 2016
From: KINETIC CONCEPTS, INC.; KCI USA, INC.; ACELITY L.P. INC.; CHIRON HOLDINGS, INC.; CHIRON TOPCO, INC.; KCI ANIMAL HEALTH, LLC; KCI HOLDING COMPANY, INC.; KCI HOMECARE, INC.; KCI IMPORTS, INC.; KCI INTERNATIONAL, INC.; KCI LICENSING, INC.; KCI PROPERTIES LIMITED; KCI REAL HOLDINGS, L.L.C.; KCI REAL PROPERTY LIMITED; KCI USA REAL HOLDINGS, L.L.C.; LIFECELL CORPORATION; TECHNIMOTION, LLC
To: WILMINGTON TRUST, NATIONAL ASSOCIATION
Reel/Frame 037845/0497 →
Priority Claims (1)
GB 1106491.2 · Apr 15, 2011 · national
Continuity (1)
Related Publication 20140171851A1 · Jun 19, 2014