US4919985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated styrene resin container and process for production thereof
Assignee: Toyo Seikan Group Holdings Ltd
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Filing: 1988-01-21
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Granted: 1990-04-24
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Expires: 2008-01-21
Abstract
Abstract A specific oxidation product layer is formed on the surface of a styrene resin container body, and via the oxidation product layer, a coated layer of a copolymer of vinylidene chloride, vinyl chloride and a (meth)acrylate is provided. This coated container has not only excellent gas-barrier property but also excellent peel resistance, particularly excellent peel resistance at low temperatures in the wet state.
Inventors
- 👤 Tamio Asai
- 👤 Yoshitsugu Maruhashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:10
CPC Classifications
B; B05; B05D; B05D3/00; B05D3/10; B05D3/101; B05D7/00; B05D7/02; B65; B65D; B65D25/00; B65D25/34; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/048; C08J7/12; C08J2325/00; C08J2325/02; C08J2325/04; C08J2427/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
124 words
A coated styrene resin container comprising a container body composed of a styrene resin and having applied to at least one surface of the container body, a coated layer of a vinylidene chloride resin, the vinylidene chloride resin coated layer being composed of a copolymer containing 96 to 70 mole % of vinylidene chloride units, 3 to 30 mole % of vinyl chloride units and 3 to 20 mole % of lower alkyl acrylate or methacrylate units based on the three components, and the coated layer being intimately bonded to the container body via a layer of an oxidation product of the styrene resin which has O IS peaks at a bond energy of 532.5 to 533.6 eV when measured by X-ray photoelectron spectroscopy.
Claim 2
Dependent Claim
124 words
A coated styrene resin container comprising a container body composed of a styrene resin and having applied to at least one surface of the container body, a coated layer of a vinylidene chloride resin, the vinylidene chloride resin coated layer being composed of a copolymer containing 96 to 70 mole % of vinylidene chloride units, 3 to 30 mole % of vinyl chloride units and 3 to 20 mole % of lower alkyl acrylate or methacrylate units based on the three components, and the coated layer being intimately bonded to the container body via a layer of an oxidation product of the styrene resin which has O IS peaks at a bond energy of 532.5 to 533.6 eV when measured by X-ray photoelectron spectroscopy.
Claim 3
Dependent Claim
47 words
The container set forth in claim 1 in which the coated layer is intimately bonded to the container body so that when the container is immersed in water at 5° C. for 1 week, it has a wet peel strength of at least 100 g/18 mm width.
Claim 4
Dependent Claim
31 words
The container set forth in claim 1 in which the styrene resin is a copolymer containing 99 to 70 mole % of styrene and 1 to 30 mole % of butadiene.
Claim 5
Dependent Claim
41 words
The container set forth in claim 1 in which the vinylidene chloride resin coated layer has a glass transition point of 6° to 18° C. and a dynamic modulus of 2×10 10 to 4×10 10 dyne/cm 2 (10° C., 110 Hz).
Claim 6
Dependent Claim
35 words
The container set forth in claim 1, wherein said layer has an area ratio (Ro/c) of oxygen peaks (O IS ) to carbon peaks (C IS ) in the range of from 0.1 to 0.34.
Claim 7
Dependent Claim
141 words
A process for producing a coated styrene resin container, which comprises subjecting at least one surface of a container body composed of a styrene resin to an oxidation treatment so that the area ratio of oxygen peaks to carbon peaks measured by X-ray photoelectron spectroscopy is in the range of from 0.15 to 0.32 such that the oxidation product of the styrene resin has O IS peaks at a bond energy of 532.5 to 533.6 eV when measured by X-ray photoelectron spectroscopy coating an aqueous latex of a vinylidene chloride resin containing 96 to 70 mole % of vinylidene chloride units, 3 to 30 mole % of vinyl chloride units and 3 to 20% of lower alkyl acrylate or methacrylate units based on the three components on the oxidized surface of the container body, and drying the coated layer so formed.
Claim 8
Dependent Claim
141 words
A process for producing a coated styrene resin container, which comprises subjecting at least one surface of a container body composed of a styrene resin to an oxidation treatment so that the area ratio of oxygen peaks to carbon peaks measured by X-ray photoelectron spectroscopy is in the range of from 0.15 to 0.32 such that the oxidation product of the styrene resin has O IS peaks at a bond energy of 532.5 to 533.6 eV when measured by X-ray photoelectron spectroscopy coating an aqueous latex of a vinylidene chloride resin containing 96 to 70 mole % of vinylidene chloride units, 3 to 30 mole % of vinyl chloride units and 3 to 20% of lower alkyl acrylate or methacrylate units based on the three components on the oxidized surface of the container body, and drying the coated layer so formed.
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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) | 1993-04-23 | 1993-10-23 | 1994-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-23 | 1997-10-23 | 1998-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-23 | 2001-10-23 | 2002-04-24 | $7700.00 | Window Closed / Lapsed |