US4264750A
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Process for fluorinating polymers
Assignee: Massachusetts Institute of Technology
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Filing: 1980-03-26
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Granted: 1981-04-28
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Expires: 2000-03-26
Abstract
Abstract Fluorinated low energy polymer surfaces are provided by fluorinating a hydrocarbon polymer with ions or radicals of fluorinated species in a cold plasma.
Inventors
- 👤 Madhu Anand
- 👤 Raymond F. Baddour
- 👤 Robert E. Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:30
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/14; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/129; C; C08; C08F; C08F8/00; C08F8/18; C08F8/20; C08J; C08J7/00; C08J7/12; C08J7/126; B01J2219/00; B01J2219/08; B01J2219/0803; B01J2219/0805; B01J2219/0845; B01J2219/0847; B01J2219/0894; B01J2219/0896
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
74 words
The process for fluorinating a hydrocarbon or amide polymer to form a low energy fluorinated polymer surface substantially free of oxygen which comprises contacting a polymer with a cold plasma comprising ions and/or radicals of fluorinated species selected from the group consisting of fluorine, tetrafluoromethane, hydrogen fluoride, hexafluoroethane, sulfur hexafluoride, difluoromethane, trifluoromethane, and mixtures thereof, under conditions to effect substantially complete fluorination of the surface of said polymer without substantial degradation of said polymer.
Claim 2
Dependent Claim
74 words
The process for fluorinating a hydrocarbon or amide polymer to form a low energy fluorinated polymer surface substantially free of oxygen which comprises contacting a polymer with a cold plasma comprising ions and/or radicals of fluorinated species selected from the group consisting of fluorine, tetrafluoromethane, hydrogen fluoride, hexafluoroethane, sulfur hexafluoride, difluoromethane, trifluoromethane, and mixtures thereof, under conditions to effect substantially complete fluorination of the surface of said polymer without substantial degradation of said polymer.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein said plasma is generated with a radio frequency excitation.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein said fluorinated non-hydrogenated species is fluorine.
Claim 5
Dependent Claim
15 words
The process of any one of claims 1 through 3 wherein said polymer is polyethylene.
Claim 6
Dependent Claim
15 words
The process of any one of claims 1 through 3 wherein said polymer is polypropylene.
Claim 7
Dependent Claim
16 words
The process of any one of claims 1 through 3 wherein said polymer is a polyamide.
Claim 8
Dependent Claim
22 words
The process of any one of claims 1 through 3 wherein said polymer is placed within a Faraday cage during the reaction.
Claim 9
Dependent Claim
15 words
The process of any one of claims 1 through 3 wherein said polymer comprises particles.
Claim 10
Dependent Claim
22 words
The process of any one of claims 1 through 3 wherein said polymer comprises particles which form a fluidized bed during reaction.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |