Hydrophilic polymer alloy, fiber and porous membrane comprising this polymer alloy, and methods for preparing them
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United States of America Patent
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Oct 14, 1997
Grant Date -
N/A
app pub date -
Jun 2, 1995
filing date -
Feb 13, 1991
priority date (Note) -
Expired
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Abstract
A hydrophilic polymer alloy which has a permanent hydrophilic nature, a sufficient mechanical strength and a high safety and which is suitable for the formation of hydrophilic porous membranes manufacturable by an industrially advantageous process can be prepared by blending an amorphous hydrophilic copolymer (X) containing 10 mole % or more of an ethylene unit, 10 to 60 mole % of a vinyl alcohol unit and 1 mole % or more of a vinyl acetate unit with a polyolefin (Y). Furthermore, this polymer alloy is also suitable for the formation of hydrophilic (porous) fibers having a sufficient mechanical strength and antistatic function.
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