US5656121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making multi-layer composites having a fluoropolymer layer
Assignee: 3M Co
•
Filing: 1994-08-19
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Granted: 1997-08-12
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Expires: 2014-08-19
Abstract
Abstract A method for increasing the adhesion of a first layer comprising fluoropolymer to a second layer comprising a hydrocarbon polymer is disclosed. The method comprises coating an aliphatic di- or polyamine of less than 1,000 molecular weight onto at least one of the layers. The resulting multi-layer compositions and articles comprising the composition are also disclosed.
Inventors
- 👤 Tatsuo Fukushi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:21
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/304; C; C08; C08J; C08J5/00; C08J5/12; C08J5/122; C08J7/00; C08J7/04; C08J7/043; C08J7/06; C08J7/065; B32B2327/00; B32B2327/12; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/31504; Y10T428/3154; Y10T428/31855; Y10T428/31909; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
128 words
A method for increasing the adhesion of a first layer comprising a fluoropolymer to a second layer comprising a polymer selected from the group consisting of polyamides, polyimides, and carboxyl, anhydride, and imide functional polyolefins, comprising the steps of (a) coating onto at least one face of at least one of said layers a composition comprising an aliphatic di- or polyamine of less than 1,000 molecular weight; (b) placing said layers together to form a multi-layer composition such that said amine composition is between and in contact with the two layers; wherein said fluoropolymer comprises interpolymerized units derived from vinylidene fluoride and said di- or polyamine is present in an amount sufficient to increase the adhesion between the two layers compared to compositions without said di- or polyamine.
Claim 2
Independent Claim
128 words
A method for increasing the adhesion of a first layer comprising a fluoropolymer to a second layer comprising a polymer selected from the group consisting of polyamides, polyimides, and carboxyl, anhydride, and imide functional polyolefins, comprising the steps of (a) coating onto at least one face of at least one of said layers a composition comprising an aliphatic di- or polyamine of less than 1,000 molecular weight; (b) placing said layers together to form a multi-layer composition such that said amine composition is between and in contact with the two layers; wherein said fluoropolymer comprises interpolymerized units derived from vinylidene fluoride and said di- or polyamine is present in an amount sufficient to increase the adhesion between the two layers compared to compositions without said di- or polyamine.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said coating step comprises solvent coating.
Claim 4
Dependent Claim
19 words
The method of claim 1 further comprising the step of heating or applying pressure to the resulting multi-layer composition.
Claim 5
Dependent Claim
11 words
The method of claim 1 wherein said polyamide is a nylon.
Claim 6
Dependent Claim
21 words
The method of claim 1 wherein said fluoropolymer comprises at least 3% by weight of interpolymerized units derived from vinylidene fluoride.
Claim 7
Dependent Claim
28 words
The method of claim 1 wherein said fluoropolymer is a homopolymer, copolymer, or terpolymer derived from monomers selected from the group consisting of vinylidene fluoride, tetrafluoroethylene, and hexafluoropropene.
Claim 8
Dependent Claim
11 words
The method of claim 1 wherein said fluoropolymer is a fluoroplastic.
Claim 9
Dependent Claim
14 words
The method of claim 1 wherein said amine comprises at least one primary amine.
Claim 10
Dependent Claim
14 words
The method of claim 1 wherein said amine comprises at least two primary amines.
Claim 11
Dependent Claim
12 words
The method of claim 1 wherein said amine is an alkylene diamine.
Claim 12
Dependent Claim
10 words
The method of claim 1 wherein said amine is hexamethylenediamine.
Claim 13
Dependent Claim
11 words
The method of claim 1 wherein said second layer is melt-processable.
Claim 14
Dependent Claim
11 words
The method of claim 1 wherein said second layer is thermoplastic.
Claim 15
Dependent Claim
38 words
The method of claim 1 wherein said first layer is composed predominantly of fluoropolymers and said second layer is composed predominantly of polymers selected from the group consisting of polyamides, polyimides, and carboxyl, anhydride, and imide functional polyolefins.
Claim 16
Dependent Claim
36 words
The method of claim 1 wherein said first layer consists essentially of fluoropolymers and said second layer consists essentially of polymers selected from the group consisting of polyamides, polyimides, and carboxyl, anhydride, and imide functional polyolefins.
Claim 17
Dependent Claim
14 words
The method of claim 1 wherein said coating composition further comprises an organo-onium compound.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2000-08-11 | 2001-02-10 | 2001-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-11 | 2005-02-10 | 2005-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-11 | 2009-02-10 | 2009-08-12 | $7700.00 | Window Closed / Lapsed |