Claims
- 1. A .gamma.-ray-sterilizable hydrophilic porous composition which comprises:
- a porous substrate having a continuous layer made of a synthetic polymer compound and a plurality of fine pores; and
- a hydrophilic and .gamma.-ray-resistant polymer formed of a monomer containing at least one monomer represented by the following general formula I: ##STR3## wherein R.sup.1 is an alkylene group or a polymethylene group each of 1 to 4 carbon atoms, R.sup.2 is an alkyl group of 1 to 2 carbon atoms or an alkoxyalkyl group of 2 to 4 carbon atoms, and R.sup.3 is a hydrogen atom or a methyl group, said hydrophilic polymer being formed on at least part of the surface of the porous substrate in an amount not less than 5% by weight, based on the porous substrate,
- wherein the hydrophilic porous composition has an average pore diameter in the range of 0.02 to 20 .mu.m, a porosity in the range of 10 to 90% and a thickness in the range of 10 .mu.m to 5.0 mm.
- 2. A hydrophilic porous composition according to claim 1, wherein said monomer represented by the general formula I is an alkoxyalkyl (meth)acrylate.
- 3. A hydrophilic porous composition according to claim 2, wherein said synthetic polymer compound is formed substantially of a polyolefin or a halogenated polyolefin, and the hydrophilic porous composition possesses a bursting elongation of not less than 5% after exposure to .gamma.-rays.
- 4. A hydrophilic porous composition according to claim 1, wherein said synthetic polymer compound is formed substantially of a polyolefin or a halogenated polyolefin, and the hydrophilic porous composition possesses a bursting elongation of not less than 5% after exposure to .gamma.-rays.
- 5. A hydrophilic porous composition according to claim 1, wherein said synthetic polymer compound is formed substantially of a polyolefin or a polyvinylidene fluoride, and the difference of absorbance between a blank sample and an extract obtained during autoclaving of said porous composition after exposure to .gamma.-rays, is not more than 0.1 when measured at the maximum absorption wavelength between 220 to 350 nm.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1-187319 |
Jul 1989 |
JPX |
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Parent Case Info
This is a continuation-in-part application of Ser. No. 554,467, filed Jul. 19, 1990, which is now abandoned.
US Referenced Citations (12)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0077227 |
Apr 1983 |
EPX |
407900 |
Jan 1991 |
EPX |
2058802 |
Apr 1981 |
GBX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
554467 |
Jul 1990 |
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