EP0168133A1
Expired / Lapsed
EP
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A shaped body for gas separation
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1985-05-01
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Granted: —
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Expires: 2005-05-01
Abstract
Abstract A shaped body which comprises a polymer of a silyl acetylene compound of the formula in which R' is H or substituted or unsubstituted C 1-8 hydrocarbyl and each R 2 is independently selected from H, halogen, substituted or unsubstituted C 1-8 hydrocarbyl and C 1-8 alkoxy, in which the surface of the polymer has been exposed to an atmosphere of low temperature plasma of an inorganic gas. A film of the polymer is stable against the plasma treatment and the thus-modified film has good gas separation properties, especially for the enrichment of oxygen in air, with a separation factor between oxygen and nitrogen of 2.5 to 3.5.
Inventors
- 👤 Hirokazu C/O Shin-Etsu Chemical Co. Ltd Nomura
- 👤 Susumu C/O Shin-Etsu Chemical Co. Ltd Ueno
- 👤 Hajime Kitamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 21:16
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0081; B01D67/009; B01D71/00; B01D71/06; B01D71/44; C; C08; C08F; C08F38/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A shaped body which comprises a polymer of a silyl acetylene compound of the formula in which R 1 is H or substituted or unsubstituted C 1-8 hydrocarbyl and each R 2 is independently selected from H, halogen, substituted or unsubstituted C 1-3 hydrocarbyl and C 1-8 alkoxy, in which the surface of the polymer has been exposed to an atmosphere of low temperature plasma of an inorganic gas.
Claim 2
Dependent Claim
69 words
A shaped body which comprises a polymer of a silyl acetylene compound of the formula in which R 1 is H or substituted or unsubstituted C 1-8 hydrocarbyl and each R 2 is independently selected from H, halogen, substituted or unsubstituted C 1-3 hydrocarbyl and C 1-8 alkoxy, in which the surface of the polymer has been exposed to an atmosphere of low temperature plasma of an inorganic gas.
Claim 3
Dependent Claim
18 words
A body as claimed in claim 1, wherein R 1 is H , methyl, ethyl, propyl or butyl.
Claim 4
Dependent Claim
23 words
A body as claimed in claim 1 or claim 2, wherein, when hydrocarbyl, R 2 is methyl, ethyl, propyl, butyl, vinyl or allyl.
Claim 5
Dependent Claim
19 words
A body as claimed in any preceding claim, wherein, when alkoxy, R 2 is methoxy, ethoxy, propoxy or butoxy.
Claim 6
Dependent Claim
24 words
A body as claimed in claim 1, wherein the silyl acetylene compound is selected from l-(trimethylsilyl)-propyne, 1-(trimethylsilyl)-1-butyne, l-(triethylsilyl)-propyne, l-(trimethoxysilyl)propyne, trimethylsilyl- acetylene, l-(methyldichlorosilyl)propyne and 1-(methylsilyl)propyne.
Claim 7
Dependent Claim
37 words
A body as claimed in any preceding claim, wherein the inorganic gas is selected from helium, neon, argon, nitrogen, oxygen, air, hydrogen, water vapour, carbon dioxide, carbon monoxide, nitrogen monoxide, nitrogen dioxide, sulfur dioxide, fluorine and chlorine.
Claim 8
Dependent Claim
35 words
A body as claimed in any preceding claim, wherein the low temperature plasma is generated in an atmosphere of the inorganic gas under a pressure of from 0.67 to 1333 Pa (0.005 to 10 Torr).
Claim 9
Dependent Claim
14 words
A body as claimed in any preceding claim, in the form of a film.
Claim 10
Dependent Claim
15 words
A gas separation method, which comprises using a body as claimed in any preceding claim.
References Cited (Backward Citations)
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