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US5348772A
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Use of amino groups, obtained on a polymer material by an electric treatment under nitrogen atmosphere, for accelerating a grafting reaction
Assignee: CENTER TECHNIQUE INDUSTRIAL DIT INSTITUT TEXTILE DE FRANCE
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Filing: 1992-06-02
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Granted: 1994-09-20
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Expires: 2012-06-02
Abstract
Abstract The invention relates to the use of the amino groups created on the surface of a polymer material, such as a polypropylene film, by an electric treatment, notably a cold plasma, under nitrogen atmosphere, for accelerating the grafting of the polymer material by impregnating the latter with a bath containing a vinyl type unsaturated monomer comprising a carbonyl group in α of the double vinyl bond, such as an acrylic monomer.
Inventors
- 👤 Odile Demuth
- 👤 Daniel Wattiez
- 👤 Jacques Maguin
- 👤 Jean C. Brosse
- 👤 Fabienne Poncin-Epaillard
- 👤 Bruno Chevet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:12
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/123; C08J7/16; C08J7/18; D; D06; D06M; D06M10/00; D06M10/04; D06M10/08; D06M14/00; D06M14/18; D06M14/26; D06M14/28; D06M14/30; D06M14/32
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
75 words
A process for accelerating grafting of a polymeric material by impregnating said polymeric material in a bath containing an unsaturated monomer, said unsaturated monomer containing a vinyl functionality and comprising a carbonyl group in a position α to the double bond of said vinyl functionality, wherein said polymeric material is electrically treated in a nitrogen atmosphere at a frequency of 433 MHz in order to create amino groups on the surface of said polymeric material.
Claim 2
Dependent Claim
75 words
A process for accelerating grafting of a polymeric material by impregnating said polymeric material in a bath containing an unsaturated monomer, said unsaturated monomer containing a vinyl functionality and comprising a carbonyl group in a position α to the double bond of said vinyl functionality, wherein said polymeric material is electrically treated in a nitrogen atmosphere at a frequency of 433 MHz in order to create amino groups on the surface of said polymeric material.
Claim 3
Dependent Claim
11 words
The process of claim 1, wherein the polymeric material is polypropylene.
Claim 4
Dependent Claim
15 words
The process of claim 1, wherein the electric treatment is cold plasma under nitrogen atmosphere.
Claim 5
Dependent Claim
43 words
The process of claim 1, wherein the electric treatment is carried out in the following conditions: discharge power between 30 and 100 W, time of exposure of the polymeric material placed in the visible part of the plasma between 1.5 and 3 minutes.
Claim 6
Dependent Claim
13 words
The process of claim 1, wherein the unsaturated monomer is an acrylic monomer.
Claim 7
Dependent Claim
26 words
The process of claim 5, wherein the grafting occurs at a temperature between 70° and 95° C. for time periods varying between 24 and 48 hours.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-09-19 | 1998-03-21 | 1998-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-19 | 2002-03-21 | 2002-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-19 | 2006-03-21 | 2006-09-20 | $7700.00 | Window Closed / Lapsed |