EP0100552A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Hydrophilized membrane of porous hydrophobic material and process of producing same
Assignee: Senko Medical Instrument Manufacturing Co Ltd
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Filing: 1983-08-02
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Granted: —
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Expires: 2003-08-02
Abstract
Abstract A hydrophilized membrane of a porous hydrophobic material having micropores each defined by a surface at least part of which is coated with polyethylene glycol. Water is allowed to pass through the micropores. There is also disclosed a process for hydrophilizing such a porous hydrophobic membrane.
Inventors
- 👤 Hikaru Nakanishi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 03:42
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0081; B01D67/0088; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/249993
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
25 words
A hydrophilized membrane of a porous hydrophobic material having micropores each defined by a surface at least part of which is coated with polyethylene glycol.
Claim 2
Dependent Claim
25 words
A hydrophilized membrane of a porous hydrophobic material having micropores each defined by a surface at least part of which is coated with polyethylene glycol.
Claim 3
Dependent Claim
20 words
A hydrophilized membrane according to claim 1, in which the entire surface of each micropore is coated with polyethylene glycol.
Claim 4
Dependent Claim
19 words
A hydrophilized membrane according to claim 1, in which said hydrophobic material is one of polyolefin and substituted polyolefin.
Claim 5
Dependent Claim
62 words
A process of hydrophilizing a membrane of a porous hydrophobic material having micropores, which comprises the steps of: (a) bringing said membrane into contact under a predetermined pressure with a mixture of polyethylene glycol and a liquid which has an affinity for said membrane and can be mixed with polyethylene glycol substantially homogeneously, so that the micropores are filled with said mixture.
Claim 6
Dependent Claim
62 words
A process of hydrophilizing a membrane of a porous hydrophobic material having micropores, which comprises the steps of: (a) bringing said membrane into contact under a predetermined pressure with a mixture of polyethylene glycol and a liquid which has an affinity for said membrane and can be mixed with polyethylene glycol substantially homogeneously, so that the micropores are filled with said mixture.
Claim 7
Dependent Claim
77 words
A process of hydrophilizing a membrane of a porous hydrophobic material having micropores, which comprises the steps of: (a) bringing said membrane into contact under a predetermined pressure with a liquid which has an affinity for said membrane and can be mixed with polyethyrene glycol substantially homogeneously, so that the micropores are filled with said liquid; and (b) subsequently substituting one of polyethylene glycol and an aqueous solution of polyethylene glycol for said liquid in the micropores.
Claim 8
Dependent Claim
77 words
A process of hydrophilizing a membrane of a porous hydrophobic material having micropores, which comprises the steps of: (a) bringing said membrane into contact under a predetermined pressure with a liquid which has an affinity for said membrane and can be mixed with polyethyrene glycol substantially homogeneously, so that the micropores are filled with said liquid; and (b) subsequently substituting one of polyethylene glycol and an aqueous solution of polyethylene glycol for said liquid in the micropores.
Claim 9
Dependent Claim
18 words
A process according to claim 4, in which said hydrophobic material is one of polyolefin and substituted polyolefin.
Claim 10
Dependent Claim
18 words
A process according to claim 5, in which said hydrophobic material is one of polyolefin and substituted polyolefin.
Claim 11
Dependent Claim
28 words
A process according to claim 4, in which said liquid is at least one material selected from the group consisting of methyl alcohol, ethyl alcohol and isopropyl alcohol.
Claim 12
Dependent Claim
65 words
A process according to claim 5, in which said liquid is at least one material selected from the group consisting of methyl alcohol, ethyl alcohol and isopropyl alcohol. . 10. A process according to claim 5 in which said liquid is not less than 50% aqueous solution of at least one material selected from the group consisting of metyl alcohol, ethyl alcohol and isopropyl alcohol.
References Cited (Backward Citations)
No citation records indexed.
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