US4381959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of securing an end closure to a container body
Assignee: Continental Packaging Co Inc
•
Filing: 1982-03-15
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Granted: 1983-05-03
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Expires: 2002-03-15
Abstract
Abstract An adhesive composition for bonding polished metal surfaces to vinyl chloride polymer coated metal substrates is disclosed which is comprised of a thermoplastic vinyl chloride polymer resin, a thermosetting epoxy resin normally incompatible with the vinyl chloride polymer resin and an amount of an acrylonitrile/butadiene/styrene copolymer which imparts compatibility between the epoxy resin and the vinyl chloride polymer.
Inventors
- 👤 John Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:48
CPC Classifications
C; C09; C09J; C09J127/00; C09J127/02; C09J127/04; C09J127/06; C08; C08L; C08L2666/00; C08L2666/02; C08L55/00; C08L55/02; C08L63/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
217 words
A method of securing a metal end closure having a depending annular wall to an open end of a metal container body which comprises applying an adhesive to a surface of the annular wall of the end closure and the container body, the adhesive being comprised of a homogeneous dispersion in a volatile organic solvent of a mixture of about 10 to about 70% by weight of a thermoplastic vinyl chloride polymer resin and about 5 to about 30% by weight of a thermosetting epoxy resin normally incompatible with the vinyl chloride polymer resin and an amount of about 20 to about 85% by weight of an acrylonitrile/butadiene/styrene copolymer which amount of copolymer is capable of imparting compatibility between the epoxy resin and the vinyl chloride polymer, the copolymer containing about 10 to about 30% by weight acrylonitrile, about 10 to about 30% by weight butadiene and about 40 to about 70% by weight styrene; heating the adhesive coated surfaces to volatilize the solvent, soften the thermoplastic resins and harden the epoxy resin; overlapping the annular wall portion of the end closure on the open end of the container body to form a lap seam assembly; cooling the assembly whereby the opposed surfaces of the assembly are bonded together by the adhesive solids remaining in the assembly.
Claim 2
Independent Claim
217 words
A method of securing a metal end closure having a depending annular wall to an open end of a metal container body which comprises applying an adhesive to a surface of the annular wall of the end closure and the container body, the adhesive being comprised of a homogeneous dispersion in a volatile organic solvent of a mixture of about 10 to about 70% by weight of a thermoplastic vinyl chloride polymer resin and about 5 to about 30% by weight of a thermosetting epoxy resin normally incompatible with the vinyl chloride polymer resin and an amount of about 20 to about 85% by weight of an acrylonitrile/butadiene/styrene copolymer which amount of copolymer is capable of imparting compatibility between the epoxy resin and the vinyl chloride polymer, the copolymer containing about 10 to about 30% by weight acrylonitrile, about 10 to about 30% by weight butadiene and about 40 to about 70% by weight styrene; heating the adhesive coated surfaces to volatilize the solvent, soften the thermoplastic resins and harden the epoxy resin; overlapping the annular wall portion of the end closure on the open end of the container body to form a lap seam assembly; cooling the assembly whereby the opposed surfaces of the assembly are bonded together by the adhesive solids remaining in the assembly.
Claim 3
Dependent Claim
20 words
The method of claim 1, wherein the adhesive composition of claim 1 wherein the vinyl chloride polymer is polyvinyl chloride.
Claim 4
Dependent Claim
16 words
The method of claim 1 wherein the vinyl chloride polymer is a vinyl chloride/vinyl acetate copolymer.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein the epoxy resin is epichlorohydrin-Bisphenol A.
Claim 6
Dependent Claim
15 words
The method of claim 1 wherein an aminoplast condensate is incorporated in the adhesive composition.
Claim 7
Dependent Claim
20 words
The method of claim 1 wherein the exterior surface of the open end of the container is smooth, polished metal.
Claim 8
Dependent Claim
31 words
The method of claim 1 wherein the surface of the interior surface of the overlapped annular wall portion of the closure is coated with a layer of a vinyl chloride polymer.
Claim 9
Dependent Claim
14 words
The method of claim 7 wherein the vinyl chloride polymer component is polyvinyl chloride.
References Cited (Backward Citations)
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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) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |