IP Library › Granted Patent US 8,789,708
Granted Patent B2
US 8,789,708 · App. 14/067,887 · Granted Jul 29, 2014

Atmospheric pressure microwave plasma treated porous membranes

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Quick Facts
Patent No.
US 8,789,708
App. No.
14/067,887
Granted
Jul 29, 2014
Kind
B2
Abstract

Versions of the invention include compositions and methods for making them that include a polymeric porous membrane with one or more atmospheric pressure microwave plasma modified surfaces. The modified porous membrane is stable, non-dewetting, and retains its mechanical strength.

Claims (7)

1. A composition, comprising a multi-layer halogenated polyolefin microporous membrane, comprising:

a filtration layer; and

a support layer,

the microporous membrane being non-dewetting and contact wettable with a solution of 94 weight percent or less of methanol in water; having a strength of greater than 16 Newtons and a thickness of less than about 30 microns; including one or more surfaces with an O/C ratio of greater than about 0.06; and having an LRV of at least 3 for 0.1 micron or smaller particles in water.

2. The composition of claim 1 , wherein the filtration layer and the support layer are coextruded, laminated, bonded, or fusion bonded together.

3. The composition of claim 1 , wherein the filtration layer and the support layer are pleated together.

4. The composition of claim 1 , wherein the microporous membrane has a strength of at least 20 Newtons.

Assignments (5)
SECURITY INTEREST Recorded Jul 8, 2022
From: ENTEGRIS, INC.; ENTEGRIS GP, INC.; POCO GRAPHITE, INC.; CMC MATERIALS, INC.; INTERNATIONAL TEST SOLUTIONS, LLC; QED TECHNOLOGIES INTERNATIONAL, INC.
To: TRUIST BANK, AS NOTES COLLATERAL AGENT
Reel/Frame 060613/0072 →
ASSIGNMENT OF PATENT SECURITY INTEREST RECORDED AT REEL/FRAME 048811/0679 Recorded Nov 5, 2019
From: GOLDMAN SACHS BANK USA
To: MORGAN STANLEY SENIOR FUNDING, INC.
Reel/Frame 050965/0035 →
SECURITY INTEREST Recorded Nov 13, 2018
From: ENTEGRIS, INC.; SAES PURE GAS, INC.
To: GOLDMAN SACHS BANK USA
Reel/Frame 048811/0679 →
RELEASE OF SECURITY INTEREST Recorded Nov 8, 2018
From: GOLDMAN SACHS BANK USA, AS COLLATERAL AGENT
To: ENTEGRIS, INC.; POCO GRAPHITE, INC.; ATMI, INC.; ATMI PACKAGING, INC.; ADVANCED TECHNOLOGY MATERIALS, INC.
Reel/Frame 047477/0032 →
RELEASE OF SECURITY INTEREST Recorded Nov 8, 2018
From: GOLDMAN SACHS BANK USA, AS COLLATERAL AGENT
To: ENTEGRIS, INC.; POCO GRAPHITE, INC.; ATMI, INC.; ATMI PACKAGING, INC.; ADVANCED TECHNOLOGY MATERIALS, INC.
Reel/Frame 047477/0151 →