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US 9,868,834 B2Granted
Polymer blend for membranes
AssigneeEvoqua Water Technologies LLC
InventorsAndrew M. Groth, Geoffrey Johnston-Hall, Clem Powell
Life of this patent
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Abstract
Disclosed herein are aspects and embodiments of hydrophilic polymeric blend and polymeric membranes which may be formed from the hydrophilic polymeric blend. In one example, the polymeric blend includes a hydrophobic membrane forming polymer and a polyoxazoline as a blend compatible hydrophilizing additive.
Claims5
A homogeneous hydrophilic composition formed from a mixture of:
- a membrane forming hydrophobic polymer comprising polyvinylidene fluoride (PVDF);
- polyvinylpryrrolidone-co-vinyl acetate (PVP-VA);
- and
- a polyoxazoline having the following formula:
- the ratio of the membrane forming hydrophobic polymer to the polyoxazoline being from about 3:1 to about 28:1 by weight, wherein the alkyl group is one of a methyl, propyl, or butyl group.
2 more elements
Dependencies are inferred from the claim text.