Coatings for biological fluid filters

Patent metadata

Field	Value
Publication number	US-2016236152-A1
Application number	US-201615137894-A
Country	US
Kind code	A1
Filing date	Apr 25, 2016
Priority date	Jun 15, 2013
Publication date	Aug 18, 2016
Grant date	—

Abstract

Filter media, filter devices and methods of making filter media are disclosed. The filter media includes a coating on at least a portion of said outer surface. The coating may be polymeric composition having a molecular chain that includes segments of non-polar groups and segments of at least one of polar groups or segments of ionic groups.

First claim

1 - 21 . (canceled)

22 . A method of making a leukoreduction filter comprising:
a) forming a coating material by dissolving a selected amount of a polymeric composition comprising segments of a non-polar groups and at least one of segments of polar groups or segments of ionic groups in a solvent; and b) contacting at least a portion of a porous material with said coating.

23 . The method of claim 22 wherein said segments of said polar groups comprise vinyl acetate.

24 . The method of claim 22 wherein said solvent comprises a mixture of hexane and 2-butanone.

25 . The method of claim 24 wherein the ratio of the volume of hexane to the volume of 2-butanone is about 1:4.

26 . The method of claim 22 wherein the concentration of said polymeric composition in said solvent is between about 0.1%-2.0% (w/v).

27 . The method of claim 22 wherein the concentration of said polymeric composition in said solvent is between about 0.14%-1.6% (w/v).

28 . The method of claim 22 wherein said segments of said ionic groups comprise acrylic acid.

29 . The method of claim 28 wherein said solvent comprises a mixture of hexane and ethanol.

30 . The method of claim 29 wherein the ratio of the volume of hexane to the volume of ethanol is about 1:1.

31 . The method of claim 28 wherein the concentration of said polymeric composition in said solvent is between about 0.1%-2.0% (w/v).

32 . The method of claim 28 wherein the concentration of said polymeric composition in said solvent is between about 0.06%-1.0% (w/v).

33 . The method of claim 22 wherein said porous material comprises a melt blown, non-woven porous membrane.

34 . The method of claim 33 wherein said melt blown, non-woven porous membrane substantially comprises polyolefin.

35 . The method of claim 22 further comprising drying said coated material under one of ambient conditions or elevated temperature.

36 . The method claim 23 comprising drying said coated material in a convection type oven at 80° C. for about 30 minutes.

37 . The method of claim 22 further comprising introducing said coated porous material in between opposed walls of a housing.

Assignees

• Fenwal Inc

Inventors

• Mizobuchi Yoshikazu
• Alfaro Jo Anne

Classifications

• B01D2323/12

  Specific ratios of components used · CPC title

• B01D69/02

  characterised by their properties · CPC title

• A61M2207/00

  Methods of manufacture, assembly or production · CPC title

• A61M1/3633

  Blood component filters, e.g. leukocyte filters · CPC title

• B01D2239/0478

  on a layer of the filter · CPC title