US4696686A
Expired / Lapsed
US
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Oxygen separating member and process for producing the same
Assignee: Denso Corp
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Filing: 1985-12-19
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Granted: 1987-09-29
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Expires: 2005-12-19
Abstract
Abstract An invention relates to an oxygen separating member including a composite membrane made of a porous substrate and an organopolysiloxane film formed on the surface of the substrate. A fluorine-containing organic compound is chemically in the organopolysiloxane film. The process for producing an oxygen separating member comprising a composite membrane having an organopolysiloxane film formed on the surface of a porous substrate includes exposing the film in an inert gas plasma to produce radical active sites in the organopolysiloxane film, and then contacting it with a gaseous fluorine-containing organic compound containing a radical polymerization group to form a chemical linkage between said organopolysiloxane and fluorine-containing compound.
Inventors
- 👤 Kyohei Usami
- 👤 Katsuhiko Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:44
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0081; B01D67/0093; B01D67/00931; B01D69/00; B01D69/12; B01D69/125; B01D69/127; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
40 words
An oxygen separating member comprising: a composite membrane consisting of a porous substrate and a single organopolysiloxane film formed on a surface of said substrate, a fluorine-containing organic compound being chemically combined in said organopolysiloxane film in a non-plasma atmosphere.
Claim 2
Dependent Claim
40 words
An oxygen separating member comprising: a composite membrane consisting of a porous substrate and a single organopolysiloxane film formed on a surface of said substrate, a fluorine-containing organic compound being chemically combined in said organopolysiloxane film in a non-plasma atmosphere.
Claim 3
Dependent Claim
28 words
The oxygen separating member according to claim 1, wherein the organopolysiloxane is produced from a monomer selected from the group consisting of hexamethyldisiloxane, octamethylcyclotetrasiloxane, trimethyoxysilane, tetramethoxysilane and triethoxysilane.
Claim 4
Dependent Claim
15 words
The oxygen separating member according to claim 1, wherein the organopolysiloxane is produced from hexamethyldisiloxane.
Claim 5
Dependent Claim
27 words
The oxygen separating member according to claim 1, wherein the fluorine-containing organic compound is selected from the group consisting of pentafluorostyrene, tetrafluorethylene, 1,1-difluroethylene, 1,2-difluroethylene, 1-trifluoromethylethylene and tetrafluorodivinylbenzene.
Claim 6
Dependent Claim
15 words
The oxygen separating member according to claim 1, wherein the fluorine-containing organic compound is pentafluorostyrene.
Claim 7
Dependent Claim
22 words
The oxygen separating member according to claim 1, wherein the organopolysiloxane is produced from hexamethyldisiloxane, and the fluorine-containing organic compound is pentafluorostyrene.
Claim 8
Dependent Claim
15 words
The oxygen separating member according to claim 1, wherein the porous substrate is porous polyproplylene.
Claim 9
Dependent Claim
22 words
The oxygen separating member according to claim 1, wherein the porous substrate is porous polypropylene, and the organopolysiloxane is produced from hexamethyldisiloxane.
Claim 10
Dependent Claim
92 words
A process for producing an oxygen separating member, comprising: providing a composite member constituted by a single organopolysiloxane film formed on a surface of a porous substrate; exposing said film in an inert gas plasma to produce radical active sites in said organopolysiloxane film, evacuating the inert gas plasma to form a non-plasma atmosphere, and then reacting the organopolysiloxane film having the radical active sites in said non-plasma atmosphere with a gaseous fluorine containing organic compound containing a radical polymerization group to form a linkage between said organopolysiloxane and said fluorine-containing compound.
Claim 11
Dependent Claim
92 words
A process for producing an oxygen separating member, comprising: providing a composite member constituted by a single organopolysiloxane film formed on a surface of a porous substrate; exposing said film in an inert gas plasma to produce radical active sites in said organopolysiloxane film, evacuating the inert gas plasma to form a non-plasma atmosphere, and then reacting the organopolysiloxane film having the radical active sites in said non-plasma atmosphere with a gaseous fluorine containing organic compound containing a radical polymerization group to form a linkage between said organopolysiloxane and said fluorine-containing compound.
Claim 12
Dependent Claim
26 words
The process according to claim 9, wherein the organopolysiloxane is produced from a monomer selected from the group consisting of hexamethyldisiloxane, octamethylcyclotetrasiloxane, trimethoxysiloane, tetramethoxysilane and triethoxysilane.
Claim 13
Dependent Claim
11 words
The process according to claim 9, wherein the organopolysiloxane is hexamethyldisiloxane.
Claim 14
Dependent Claim
20 words
The process according to claim 9, wherein the organopolysiloxane is produced from hexamethyldisiloxane, and the fluorine-containing organic compound is pentafluorostyrene.
Claim 15
Dependent Claim
13 words
The process according to claim 9, wherein the porous substrate is porous polyprophylene.
Claim 16
Dependent Claim
25 words
The process according to claim 9, wherein the porous substrate is porous polypropylene, the organopolysiloxane is produced from hexamethyldisiloxane, and the fluorine-containing compound is pentafluorostyrene.
Claim 17
Dependent Claim
14 words
The process according to claim 9, wherein the inert gas is argon or helium.
Claim 18
Dependent Claim
12 words
The process according to claim 9, wherein the inert gas is argon.
Claim 19
Dependent Claim
26 words
The process according to claim 9, wherein the organopolysiloxane film is formed from plasma polymerization of an organosiloxane monomer or from a solution of an organopolysiloxane.
Claim 20
Dependent Claim
24 words
The process according to claim 9, wherein plasma is generated by a system selected from internal electrode system, external electrode system and electrodeless system.
Claim 21
Dependent Claim
23 words
The process according to claim 9, wherein the plasma treatment and the gaseous fluorine-containing organic compound treatment are repeated on said single film.
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