US4585694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layered thermoplastic structures comprising a layer of a vinyl or vinylidene fluoride polymer bonded to a layer of an alpha-olefin polymer
Assignee: Solvay SA
•
Filing: 1984-04-25
•
Granted: 1986-04-29
•
Expires: 2004-04-25
Abstract
Abstract Multi-layered thermoplastic structures comprising a layer of a vinyl or vinylidene fluoride polymer bonded to a layer of an alpha-olefin polymer with the joint aid of a vinyl acetate polymer and a copolymer of ethylene and vinyl acetate. The multi-layered thermoplastic structures can be in the form of films, sheets, plates or tubes which can be used in the field of protection from corrosion or ultra-violet rays.
Inventors
- 👤 Claude Dehennau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:35
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/304; B32B27/306; B32B27/32; B32B2323/00; B32B2323/04; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2878; Y10T428/31504; Y10T428/3154; Y10T428/31855; Y10T428/31909; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
59 words
Multi-layered thermoplastic structures comprising a layer of a vinyl or vinylidene fluoride polymer bonded to a layer of an alpha-olefin polymer, characterized in that the layer of a vinyl or vinylidene fluoride polymer is bonded to the layer of an alpha-olefin polymer using both a vinyl acetate polymer and a copolymer of ethylene and vinyl acetate as polymeric adhesives.
Claim 2
Dependent Claim
59 words
Multi-layered thermoplastic structures comprising a layer of a vinyl or vinylidene fluoride polymer bonded to a layer of an alpha-olefin polymer, characterized in that the layer of a vinyl or vinylidene fluoride polymer is bonded to the layer of an alpha-olefin polymer using both a vinyl acetate polymer and a copolymer of ethylene and vinyl acetate as polymeric adhesives.
Claim 3
Dependent Claim
32 words
Multi-layered thermoplastic structures according to claim 1, characterized in that the vinyl acetate polymer is a binary copolymer of vinyl acetate and ethylene containing 60 to 90% by weight of vinyl acetate.
Claim 4
Dependent Claim
34 words
Multi-layered thermoplastic structures according to claim 1, characterized in that the copolymer of ethylene and vinyl acetate is a binary copolymer of ethylene and vinyl acetate containing 60 to 95% by weight of ethylene.
Claim 5
Dependent Claim
22 words
Multi-layered thermoplastic structures according to claim 1, characterized in that the vinyl or vinylidene fluoride polymer is a homopolymer of vinylidene fluoride.
Claim 6
Dependent Claim
22 words
Multi-layered thermoplastic structures according to claim 1, characterized in that the vinyl or vinylidene fluoride polymer is a homopolymer of vinyl fluoride.
Claim 7
Dependent Claim
20 words
Multi-layered thermoplastic structures according to claim 1, characterized in that the alpha-olefin polymer is chosen from polyethylene, polypropylene and polystyrene.
Claim 8
Dependent Claim
15 words
Multi-layered thermoplastic structures according to claim 6, characterized in that the alpha-olefin polymer is polyethylene.
Claim 9
Dependent Claim
26 words
Multi-layered thermoplastic structures according to claim 1, characterized in that the vinyl acetate polymer and the copolymer of ethylene and vinyl acetate constitute two distinct layers.
Claim 10
Dependent Claim
48 words
Multi-layered thermoplastic structures according to claim 8, characterized in that they result from assembly by coating and in that they contain four layers consisting of, in order, a vinyl or vinylidene fluoride polymer, a vinyl acetate polymer, a copolymer of ethylene and vinyl acetate, and an alpha-olefin polymer.
Claim 11
Dependent Claim
26 words
Multi-layered thermoplastic structures according to claim 1, characterized in that the vinyl acetate polymer and the copolymer of ethylene and vinyl acetate constitute a single layer.
Claim 12
Dependent Claim
55 words
Multi-layered thermoplastic structures according to claim 10, characterized in that they result from assembly by coextrusion or by coextrusion/coating and in that they contain three layers consisting of, in order, a vinyl or vinylidene fluoride polymer, a mixture of a vinyl acetate polymer and a copolymer of ethylene and vinyl acetate, and an alpha-olefin polymer.
Claim 13
Dependent Claim
20 words
Multi-layered thermoplastic structures according to claim 1, characterized in that the vinyl acetate polymer is a homopolymer of vinyl acetate.
Claim 14
Dependent Claim
48 words
Method for preventing delamination in a multi-layered thermoplastic structure comprising a layer of vinyl or vinylidene fluoride polymer bonded to a layer of an alpha-olefin polymer, comprising bonding said layers together using an adhesive consisting of a copolymer of ethylene and vinyl acetate and a vinyl acetate polymer.
Claim 15
Dependent Claim
48 words
Method for preventing delamination in a multi-layered thermoplastic structure comprising a layer of vinyl or vinylidene fluoride polymer bonded to a layer of an alpha-olefin polymer, comprising bonding said layers together using an adhesive consisting of a copolymer of ethylene and vinyl acetate and a vinyl acetate polymer.
Claim 16
Dependent Claim
42 words
The method of claim 13, wherein the vinyl acetate polymer and the copolymer of ethylene and vinyl acetate are mixed together before being applied as an adhesive to at least one of the vinyl or vinylidene fluoride polymer or alpha-olefin polymer layers.
Claim 17
Dependent Claim
53 words
The method of claim 13, wherein the vinyl acetate polymer is applied to the vinyl or vinylidene fluoride polymer layer and the copolymer of ethylene and vinyl acetate is applied to the alpha-olefin polymer layer, and said layers are pressed together with the surfaces to which the adhesives were applied facing each other.
Claim 18
Dependent Claim
106 words
A multi-layered thermoplastic structure, comprising: a fluorinated polymer layer comprised of a fluorinated polymer selected from the group consisting of homopolymers of vinyl fluoride, homopolymers of vinylidene fluoride and copolymers of vinyl fluoride and vinylidene fluoride; an olefinic polymer layer comprised of an alpha-olefin polymer; and an adhesive layer positioned between the fluorinated polymer layer and the olefinic polymer layer for bonding same to one another, the adhesive layer being comprised of a vinyl acetate polymer and a copolymer of ethylene and vinyl acetate, said vinyl acetate polymer having at least 50% by weight vinyl acetate, and said copolymer having at least 50% by weight ethylene.
Claim 19
Dependent Claim
106 words
A multi-layered thermoplastic structure, comprising: a fluorinated polymer layer comprised of a fluorinated polymer selected from the group consisting of homopolymers of vinyl fluoride, homopolymers of vinylidene fluoride and copolymers of vinyl fluoride and vinylidene fluoride; an olefinic polymer layer comprised of an alpha-olefin polymer; and an adhesive layer positioned between the fluorinated polymer layer and the olefinic polymer layer for bonding same to one another, the adhesive layer being comprised of a vinyl acetate polymer and a copolymer of ethylene and vinyl acetate, said vinyl acetate polymer having at least 50% by weight vinyl acetate, and said copolymer having at least 50% by weight ethylene.
Claim 20
Dependent Claim
63 words
A multi-layered thermoplastic structure according to claim 16, wherein said adhesive layer is a double-layer comprising a vinyl acetate polymer layer which is positioned next to said fluorinated polymer layer and comprises at least 50% by weight vinyl acetate, and an ethylene vinyl acetate copolymer layer which is positioned next to said olefinic polymer layer and comprises at least 50% by weight ethylene.
Claim 21
Dependent Claim
30 words
A multi-layered thermoplastic structure according to claim 16, wherein said adhesive layer comprises a 1:1 weight ratio of said vinyl acetate polymer and said copolymer of ethylene and vinyl acetate.
References Cited (Backward Citations)
FR1484153A
Cited
US3519531A
Cited
GB1309011A
Cited
FR2181968A1
Cited
US4006741A
Cited
US4424240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |