Patent EP0352199A2 successfully refreshed from Google Patents.
EP0352199A2
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EP
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Hydrophilic material and method of manufacturing the same
Assignee: Terumo Corp
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Filing: 1989-07-21
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Granted: —
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Expires: 2009-07-21
Abstract
Abstract A hydrophilic material having excellent hydrophilicity and fitness to living bodies and used for porous membranes or the like and also a method of manufacturing the same. The hydrophilic material is formed by subjecting at least part of the surfaces (1a) of a substrate (1) of a polymer material to a plasma treatment to thereby produce a polymer radical and graft polymerizing therewith a block copolymer containing a hydrophilic monomer (2) supplied in the gasious phase and a subsequently supplied hydrophobic monomer (3).
Inventors
- 👤 Makoto Ohnishi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 15:30
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0081; B01D67/0093; B01D67/00931; A; A61; A61L; A61L33/00; A61L33/0076; A61L33/0088; C; C08; C08J; C08J7/00; C08J7/12; C08J7/16; C08J7/18; B01D2323/00; B01D2323/38; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
49 words
A hydrophilic material, characterized in that a block copolymer containing a material (X) having a hydrophilic polymer chain and a material (Y) having a hydrophobic polymer chain, and/or these materials (X) and (Y) are coupled as graft chain to the surfaces of a substrate (Z) of a polymer material.
Claim 2
Dependent Claim
49 words
A hydrophilic material, characterized in that a block copolymer containing a material (X) having a hydrophilic polymer chain and a material (Y) having a hydrophobic polymer chain, and/or these materials (X) and (Y) are coupled as graft chain to the surfaces of a substrate (Z) of a polymer material.
Claim 3
Dependent Claim
60 words
A hydrophilic porous membrane composed of the hydrophilic material according to claim 1, characterized in that said substrate (Z) is a porous membrane substrate, and said block copolymer and/or the materials (X) and (Y) are coupled as graft chain to at least part of the surfaces of said porous membrane substrate(Z) and inner pore surfaces of said porous membrane substrate(Z).
Claim 4
Dependent Claim
69 words
The hydrophilic porous membrane according to claim 2, characterized in that said substrate (Z) is composed of a hydrophobic polymer material with a threshold surface tension of 50 dyn/cm or below and/or a water absorption factor of 1.0% or below, and said porous membrane was a bubble point of 0.2 to 20.0 kgf/cm², a membrane thickness of 20 to 300 µm and a porosity of 20 to 80 %.
Claim 5
Dependent Claim
27 words
The hydrophilic porous membrane according to claim 2 or 3, characterized in that said substrate (Z) is composed of a hydrophobic polymer material mainly composed of polypropylene.
Claim 6
Dependent Claim
15 words
A material fitted to living bodies composed of the hydrophilic material according to claim 1.
Claim 7
Independent Claim
129 words
A method of manufacturing a hydrophilic material characterized by comprising a first step of subjecting at least part of the surfaces (1a) of a substrate (Z) of a polymer material to a plasma treatment to thereby produce a polymer radical on said surfaces, a second step of causing graft polymerization with said polymer radical as point of initiation of polymerization by supplying a hydrophilic monomer (X) in gaseous phase to the substrate (Z) and a third step of causing graft polymerization subsequent to the second step with the polymer radical present at the point of growth of the hydrophilic monomer (X) and/or radical on the surfaces of the substrate (Z) as point of initiation of polymerization by supplying a hydrophilic monomer (Y) in gaseous phase to the substrate (Z).
Claim 8
Independent Claim
129 words
A method of manufacturing a hydrophilic material characterized by comprising a first step of subjecting at least part of the surfaces (1a) of a substrate (Z) of a polymer material to a plasma treatment to thereby produce a polymer radical on said surfaces, a second step of causing graft polymerization with said polymer radical as point of initiation of polymerization by supplying a hydrophilic monomer (X) in gaseous phase to the substrate (Z) and a third step of causing graft polymerization subsequent to the second step with the polymer radical present at the point of growth of the hydrophilic monomer (X) and/or radical on the surfaces of the substrate (Z) as point of initiation of polymerization by supplying a hydrophilic monomer (Y) in gaseous phase to the substrate (Z).
Claim 9
Dependent Claim
30 words
The method of manufacturing a hydrophilic material according to claim 6, characterized in that said second and third steps are performed repeatedly in the mentioned order after said third step.
References Cited (Backward Citations)
No citation records indexed.
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