US5260360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil, water and sweat repellent microporous membrane materials
Assignee: 3M Co
•
Filing: 1991-10-18
•
Granted: 1993-11-09
•
Expires: 2011-10-18
Abstract
Abstract The invention discloses an oleophobic, hydrophobic, water repellent, moisture vapor and air permeable, heat sealable, microporous membrane material suitable for garment applications. The membrane material comprises a polyolefin polymer, a processing compound which is miscible with the polymer at its melt temperature but phase separates when the polymer is cooled to or below its melt temperature, and a fluorochemical composition. The membrane material is oriented in at least one direction. The membrane materials retain their repellency and moisture vapor permeable properties for extended periods of time in garment applications which expose the membrane materials to perspiration residues which are known to generally contaminate and ultimately destroy the repellency properties of conventional liquid repellent, moisture vapor permeable treatments.
Inventors
- 👤 James S. Mrozinski
- 👤 Harold J. Seppala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:38
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/425; B01; B01D; B01D67/00; B01D67/0002; B01D67/0023; B01D67/0025; B01D67/0027; B01D71/00; B01D71/06; B01D71/26; B01D71/261; B01D71/262; B01D71/76; B29; B29C; B29C55/00; B29C55/005; A41; A41D; A41D31/00; A41D31/04; A41D31/10; A41D31/102; B01D2323/00; B01D2323/12; B01D2325/00; B01D2325/38; B29K; B29K2023/00; B29K2105/00; B29K2105/0088; B29K2105/04; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/70; B32B2307/724; B32B2307/726; B32B2323/00; B32B2323/04; B32B2323/10; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
71 words
A microporous membrane material which comprises a crystallizable olefin polymer, a processing compound which is miscible with the olefin polymer at the polymer's melting point but phase separates on cooling to or below the olefin crystallization temperature of the polymer, the blending ratio of polyolefin to processing compound being in the range of about 40:60 to 80:20, and a fluorochemical oxazolidinone compound, said material being oriented in at least one direction.
Claim 2
Dependent Claim
71 words
A microporous membrane material which comprises a crystallizable olefin polymer, a processing compound which is miscible with the olefin polymer at the polymer's melting point but phase separates on cooling to or below the olefin crystallization temperature of the polymer, the blending ratio of polyolefin to processing compound being in the range of about 40:60 to 80:20, and a fluorochemical oxazolidinone compound, said material being oriented in at least one direction.
Claim 3
Dependent Claim
38 words
The material of claim 1 wherein said olefin polymer is polypropylene, block copolymers or copolymers of ethylene and propylene, or other copolymers such as polyethylene, polypropylene and polybutylene copolymers which can be used singularly or in a mixture.
Claim 4
Dependent Claim
13 words
The material of claim 1 wherein said processing compound is a hydrocarbon liquid.
Claim 5
Dependent Claim
21 words
The material of claim 1 wherein said processing compound is mineral oil or a mixture of mineral oil and mineral spirits.
Claim 6
Dependent Claim
56 words
The material of claim 1 wherein said fluorochemical oxazolidinone is a normally solid, water-insoluble, fluoroaliphatic radical-containing 2-oxazolidinone compound which has one or more 2-oxazolidinone moieties, at least one of which has a monovalent fluoroaliphatic radical containing at least 3 fully fluorinated terminal carbon atoms bonded to the 5-position carbon atom thereof by an organic linking group.
Claim 7
Dependent Claim
30 words
The material of claim 1 wherein the fluorochemical oxazolidinone is blended with the polyolefin and processing compound at extrusion and comprises about 0.3 to 7 weight percent of the material.
Claim 8
Dependent Claim
30 words
The material of claim 1 wherein the fluorochemical oxazolidinone is blended with the polyolefin and processing compound at extrusion and comprises about 1 to 2 weight percent of the material.
Claim 9
Dependent Claim
16 words
The material of claim 5 wherein said fluorochemical oxazolidinone can be represented by the formula: ##STR3##
Claim 10
Dependent Claim
36 words
The material of claim 1 wherein the fluorochemical oxazolidinone is topically applied to moisture vapor permeable, microporous membrane material at a rate of at least 5 percent by weight based on the weight of the material.
Claim 11
Dependent Claim
19 words
The material of claim 1 wherein said moisture vapor transmission rate is at least 700 g/m 2 /24 hours.
Claim 12
Dependent Claim
23 words
The material of claim 1 wherein said material can be heat sealed to form a bond strength of at least 0.1 kg/cm width.
References Cited (Backward Citations)
US3094547A
Cited
US3341497A
Cited
US4194041A
Cited
US4539256A
Cited
US4443511A
Cited
JPS60142860A
Cited
US4613544A
Cited
US4609584A
Cited
US5025052A
Cited
US4726989A
Cited
JPS6422305A
Cited
US4867881A
Cited
US4824718A
Cited
JPH01305001A
Cited
US4961985A
Cited
US4863792A
Cited
US4877679A
Cited
JPH02212527A
Cited
US5032450A
Cited
US5017292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-08 | 1997-05-10 | 1997-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-08 | 2001-05-10 | 2001-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-08 | 2005-05-10 | 2005-11-09 | $7700.00 | Window Closed / Lapsed |