CA1242166A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Process and apparatus for forming a polymerized coating on a substrate
Assignee: CENTRE TECHNIQUE DE L'INDUSTRIES DES PAPIERS CARTONS ET CELLULOSES
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Filing: 1984-07-27
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Granted: 1988-09-20
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Expires: 2004-07-27
Abstract
Abstract A PROCESS AND DEVICE FOR FORMING A POLYMERIZED COATING ON A SUBSTRATE ABSTRACT OF THE DISCLOSURE To form a polymerized coating on a substrate, the surface of a substrate to be coated is placed in contact with a confined atmosphere containing a monomer or prepolymer in dispersed phase for giving rise to the coating polymer and a cold plasma is created by electric discharge in the confined atmosphere so as to create, from the monomer, reactive spe-cies which give rise to the polymerized coating. The electric discharge is an AC Corona discharge at a pressure close to atmospheric pressure between an electrode with a small radius of curvature and an electrode carrying the substrate, in a mixture of vapor phase monomer and an inert gas.
Inventors
- 👤 Farangis Rouzbehi
- 👤 Max Goldmann
- 👤 Jacques Amouroux
- 👤 Farzaneh Arefi
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-27 19:15
CPC Classifications
D; D06; D06M; D06M10/00; D06M10/04; D06M10/08; D06M10/10; C; C08; C08J; C08J7/00; C08J7/12; C08J7/16; C08J7/18; D21; D21H; D21H23/00; D21H23/02; D21H23/22
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
120 words
A process of in situ polymerizing a carbon-containing monomer or prepolymer on a substrate for forming an adherent coating thereon, comprising the steps of placing said substrate in contact with said monomer or prepolymer dispersed in an atmosphere in contact with the substrate and contained in an enclosure under a pressure close to normal atmospheric pressure and generating a Corona discharge by applying an AC voltage between a first electrode having a small radius of curvature and a grounded second electrode, carrying the substrate and having a radius of curvature greater than said small radius by several orders of magnitude, whereby reactive species are formed and driven by electric wind toward said substrate for in situ polymerization on said substrate.
Claim 2
Dependent Claim
120 words
A process of in situ polymerizing a carbon-containing monomer or prepolymer on a substrate for forming an adherent coating thereon, comprising the steps of placing said substrate in contact with said monomer or prepolymer dispersed in an atmosphere in contact with the substrate and contained in an enclosure under a pressure close to normal atmospheric pressure and generating a Corona discharge by applying an AC voltage between a first electrode having a small radius of curvature and a grounded second electrode, carrying the substrate and having a radius of curvature greater than said small radius by several orders of magnitude, whereby reactive species are formed and driven by electric wind toward said substrate for in situ polymerization on said substrate.
Claim 3
Dependent Claim
18 words
A process according to claim 1, wherein the pressure in said enclosure is slightly lower than atmospheric pressure.
Claim 4
Dependent Claim
13 words
A process according to claim 1, wherein said monomer is a carbofluorine monomer.
Claim 5
Dependent Claim
13 words
A process according to claim 1, wherein said monomer is H2C = CF2.
Claim 6
Dependent Claim
11 words
A process according to claim 1, wherein said monomer is odoriferous.
Claim 7
Dependent Claim
22 words
A process according to claim 1, wherein said discharge is generated by applying a voltage at a frequency lower than 100 kHz.
Claim 8
Dependent Claim
103 words
A process of polymerizing a monomer containing fluorine and carbon on a substrate, comprising: passing said substrate through a gaseous medium at substantially atmospheric pressure, said medium comprising said monomer; supporting said substrate while in said medium with an electrode having a large radius of curvature, past an elongated electrode having a radius of curvature lower than 1 mm, parallel to the electrode supporting the substrate and at a distance from 1 to 5 mm from said substrate, and maintaining an AC Corona discharge between the electrodes with a current value not exceeding 40 uA per cm of length of said elongated electrode.
Claim 9
Dependent Claim
103 words
A process of polymerizing a monomer containing fluorine and carbon on a substrate, comprising: passing said substrate through a gaseous medium at substantially atmospheric pressure, said medium comprising said monomer; supporting said substrate while in said medium with an electrode having a large radius of curvature, past an elongated electrode having a radius of curvature lower than 1 mm, parallel to the electrode supporting the substrate and at a distance from 1 to 5 mm from said substrate, and maintaining an AC Corona discharge between the electrodes with a current value not exceeding 40 uA per cm of length of said elongated electrode.
Claim 10
Independent Claim
138 words
A device for polymerizing a carbon containing monomer or prepolymer onto a substrate, comprising an enclosure provided with means for flowing a substantially oxygen free flow of monomer or prepolymer in said enclosure in contact with the substrate on which a polymerized coating is to be formed while maintaining said enclosure at substantially normal atmospheric pressure; a grounded electrode with a large radius of curvature supporting the substrate an elongated electrode having a sharp edge placed parallel to the substrate where said substrate is supported by said grounded electrode and at a distance from said grounded electrode of from 1 to 5 mm; electric supply means for providing, between the electrodes, an AC voltage of a value sufficient to create a Corona discharge at said substantially atmospheric pressure; and means for circulating said substrate over said grounded electrode.
Claim 11
Independent Claim
138 words
A device for polymerizing a carbon containing monomer or prepolymer onto a substrate, comprising an enclosure provided with means for flowing a substantially oxygen free flow of monomer or prepolymer in said enclosure in contact with the substrate on which a polymerized coating is to be formed while maintaining said enclosure at substantially normal atmospheric pressure; a grounded electrode with a large radius of curvature supporting the substrate an elongated electrode having a sharp edge placed parallel to the substrate where said substrate is supported by said grounded electrode and at a distance from said grounded electrode of from 1 to 5 mm; electric supply means for providing, between the electrodes, an AC voltage of a value sufficient to create a Corona discharge at said substantially atmospheric pressure; and means for circulating said substrate over said grounded electrode.
Claim 12
Dependent Claim
47 words
A device according to claim 8, wherein said means for circulating said substrate move said substrate into and out of said enclosure through slots in walls of said enclosure and means connected to said walls and rubbing on said substrate for limiting gas leaks through said slots.
Claim 13
Dependent Claim
40 words
A device according to claim 8, wherein said grounded electrode is in the shape of a rotating drum and said electrode having a sharp edge is a knife blade electrode having an edge parallel to a generatrix of the drum.
Claim 14
Dependent Claim
116 words
A process of polymerizing a carbon-fluorine monomer on a base paper sheet or pattern fabric substrate for forming an adherent coating thereon, comprising the steps of placing said substrate in contact with said monomer dispersed in an atmosphere in contact with the substrate and contained in an enclosure under a pressure close to normal atmospheric pressure and generating an A.C. Corona discharge between a first electrode having a small radius of curvature and a grounded second electrode, carrying the substrate, and having a radius of curvature greater than said small radius by several orders of magnitude, whereby reactive species are formed and driven by electric wind toward said substrate for in situ polymerization on said substrate.
Claim 15
Dependent Claim
116 words
A process of polymerizing a carbon-fluorine monomer on a base paper sheet or pattern fabric substrate for forming an adherent coating thereon, comprising the steps of placing said substrate in contact with said monomer dispersed in an atmosphere in contact with the substrate and contained in an enclosure under a pressure close to normal atmospheric pressure and generating an A.C. Corona discharge between a first electrode having a small radius of curvature and a grounded second electrode, carrying the substrate, and having a radius of curvature greater than said small radius by several orders of magnitude, whereby reactive species are formed and driven by electric wind toward said substrate for in situ polymerization on said substrate.
References Cited (Backward Citations)
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