EP0030838A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Silicone gel-filled silicone rubber article possessing reduced surface-bleed
Assignee: Dow Silicones Corp
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Filing: 1980-12-09
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Granted: —
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Expires: 2000-12-09
Abstract
Abstract A silicone gel-filled silicone rubber article which is a flexible silicone rubber container (21) filled with a silicone gel composition (23) containing an essentially continuous barrier layer (22) of a fluorine-containing organopolysiloxane situated between the container wall and the silicone gel composition to reduce the tendency of unreacted components present in the silicone gel to exude or bleed to the surface of the article. Optimum reduction in bleed is observed when both the container and the gel are principally composed of polydimethylsiloxanes. An alternative embodiment is a flexible fluorosilicone rubber container filled with a silicone gel composition. These articles are useful as external mammary prostheses and as surgically implantable articles.
Inventors
- 👤 Willard Dale Larson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-22 16:03
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/50; A61F2/52; A61F2/02; A61F2/12; C; C08; C08L; C08L83/00; C08L83/04; C08L83/08; B; B29; B29C; B29C41/00; B29C41/02; B29C41/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
93 words
A silicone gel-filled silicone rubber article possessing a reduced tendency to exhibit surface-bleed comprising (A) a flexible container of silicone rubber consisting essentially of a cross-linked gum of polydimethylsiloxane, said container being filled with (B) a silicone gel composition consisting essentially of a silicone gel of cross-linked polydimethylsiloxane, characterized in that there is (C) an essentially continuous barrier layer of a filler-containing composition consisting essentially of fluorine-containing organopolysiloxane situated between the interior of container (A) and the gel composition of (B), said barrier layer being coated on the interior wall of container (A).
Claim 2
Dependent Claim
93 words
A silicone gel-filled silicone rubber article possessing a reduced tendency to exhibit surface-bleed comprising (A) a flexible container of silicone rubber consisting essentially of a cross-linked gum of polydimethylsiloxane, said container being filled with (B) a silicone gel composition consisting essentially of a silicone gel of cross-linked polydimethylsiloxane, characterized in that there is (C) an essentially continuous barrier layer of a filler-containing composition consisting essentially of fluorine-containing organopolysiloxane situated between the interior of container (A) and the gel composition of (B), said barrier layer being coated on the interior wall of container (A).
Claim 3
Dependent Claim
15 words
The article in accordance with claim 1 wherein the fluorine-containing organopolysiloxane of (C) is 3,3,3-trifluoropropylmethylpolysiloxane.
Claim 4
Dependent Claim
15 words
The article in accordance with claim 2 wherein said fluorine-containing organopolysiloxane is a cross-linked gum.
Claim 5
Dependent Claim
15 words
The article in accordance with claims 1 to 3 which is an external mammary prosthesis.
Claim 6
Dependent Claim
16 words
The article in accordance with claims 1 to 3 which is a surgically implantable mammary prosthesis.
Claim 7
Dependent Claim
13 words
The article in accordance with claim 4 which contains pigments simulating skin color.
Claim 8
Dependent Claim
49 words
A silicone gel-filled silicone rubber article possessing a reduced tendency to exhibit surface-bleed characterized in that it comprises: (A) a flexible container of fluorosilicone rubber consisting essentially of a cross-linked gum of fluoroalkylpolysiloxane filled with (B) a silicone gel composition consisting essentially of a silicone gel of cross-linked polydimethylsiloxane.
Claim 9
Dependent Claim
49 words
A silicone gel-filled silicone rubber article possessing a reduced tendency to exhibit surface-bleed characterized in that it comprises: (A) a flexible container of fluorosilicone rubber consisting essentially of a cross-linked gum of fluoroalkylpolysiloxane filled with (B) a silicone gel composition consisting essentially of a silicone gel of cross-linked polydimethylsiloxane.
Claim 10
Dependent Claim
14 words
The article in accordance with claim 7 wherein the fluoroalkylpolysiloxane of (A) is 3,3,3-trifluoropropylmethylpolysiloxane.
Claim 11
Dependent Claim
13 words
The article in accordance with claim 8 which is an external mammary prosthesis.
Claim 12
Dependent Claim
13 words
The article in accordance with claim 9 which contains pigments simulating skin color.
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