US4714658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating polymer surfaces by corona discharge and then with reducing agent and resulting article
Assignee: Mobil Oil AS
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Filing: 1985-12-30
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Granted: 1987-12-22
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Expires: 2005-12-30
Abstract
Abstract Polymer surfaces such as polyethylene or polypropylene films are corona discharge treated in the conventional manner, and then treated with a reducing agent such as aqueous KI to convert the surface functional groups containing oxygen to predominantly hydroxyl groups.
Inventors
- 👤 Marjory A. Kadash
- 👤 Frederick C. Schwab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:58
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/123; B; B29; B29C; B29C59/00; B29C59/10; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2023/10; B29K2023/12; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31855; Y10T428/31938
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
71 words
A method of treating polymer articles which are capable of being surface oxidized under corona discharge conditions comprising the steps of: (a) subjecting the articles to corona discharge sufficient to introduce surface oxygen containing groups including hydroperoxide groups; and (b) immediately thereafter subjecting the article to a treatment with an alkali metal iodide or an alkaline earth metal iodide to convert at least some of said hydroperoxide groups to hydroxyl groups.
Claim 2
Independent Claim
71 words
A method of treating polymer articles which are capable of being surface oxidized under corona discharge conditions comprising the steps of: (a) subjecting the articles to corona discharge sufficient to introduce surface oxygen containing groups including hydroperoxide groups; and (b) immediately thereafter subjecting the article to a treatment with an alkali metal iodide or an alkaline earth metal iodide to convert at least some of said hydroperoxide groups to hydroxyl groups.
Claim 3
Dependent Claim
14 words
The method of claim 1 in which said treatment is conducted with potassium iodide.
Claim 4
Dependent Claim
20 words
The method of claim 2 in which said polymer is polyethylene or a copolymer of ethylene and a higher olefin.
Claim 5
Dependent Claim
9 words
An article prepared by the method of claim 3.
Claim 6
Dependent Claim
11 words
The method of claim 2 in which said polymer is polypropylene.
Claim 7
Dependent Claim
9 words
An article prepared by the method of claim 5.
Claim 8
Dependent Claim
9 words
An article prepared by the method of claim 2.
Claim 9
Dependent Claim
20 words
The method of claim 1 in which said polymer is polyethylene or a copolymer of ethylene and a higher olefin.
Claim 10
Dependent Claim
9 words
An article prepared by the method of claim 8.
Claim 11
Dependent Claim
11 words
The method of claim 1 in which said polymer is polypropylene.
Claim 12
Dependent Claim
9 words
An article prepared by the method of claim 10.
Claim 13
Dependent Claim
13 words
The method of claim 1 in which said polymer article is a film.
Claim 14
Dependent Claim
9 words
An article prepared by the method of claim 12.
Claim 15
Dependent Claim
25 words
The method of claim 1 in which said polymer article is further treated with a reagent which is capable of reacting with said hydroxyl groups.
Claim 16
Dependent Claim
9 words
An article prepared by the method of claim 14.
Claim 17
Dependent Claim
24 words
The method of claim 14 in which said article is a film and reagent capable of reacting with hydroxyl groups is a slip agent.
Claim 18
Dependent Claim
9 words
The film produced by the method of claim 16.
Claim 19
Dependent Claim
9 words
An article prepared by the method of claim 1.
References Cited (Backward Citations)
US4468412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-21 | 1991-06-22 | 1991-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-21 | 1995-06-22 | 1995-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-21 | 1999-06-22 | 1999-12-22 | $7700.00 | Window Closed / Lapsed |