Hydrophilic porous material sterilizable with gamma-ray
AssigneeTerumo Kabushiki Kaisha
InventorsMakoto Ohnishi, Kenichi Shimura
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Abstract
A .gamma.-ray-sterilizable hydrophilic porous material has been found which includes a continuous layer made of a synthetic polymer compound forming a porous substrate and a hydrophilic and .gamma.-ray-resistant polymer supported 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. The hydrophilic porous material 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 wall thickness in the range of 10 .mu.m to 5.0 mm.
Claims5
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.
Dependencies are inferred from the claim text.