Patent US4372986A successfully refreshed from Google Patents.
US4372986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl alcohol-clad shaped article of vinyl chloride resin
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1980-07-01
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Granted: 1983-02-08
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Expires: 2000-07-01
Abstract
Abstract The invention provides a novel method for the preparation of a composite shaped article of a vinyl chloride-based resin clad with a coating layer of polyvinyl alcohol without the use of any adhesive agent. The method comprises subjecting the surface of the shaped article to exposure to an atmosphere of low temperature atmosphere, coating the thus plasma-treated surface of the shaped article with an aqueous solution of a polyvinyl alcohol and drying. The coating layer of the polyvinyl alcohol thus formed is so firmly bonded to the surface of the vinyl chloride-based resin shaped article that various advantageous properties are imparted to the shaped article.
Inventors
- 👤 Kiyoshi Imada
- 👤 Susumu Ueno
- 👤 Yasuhide Nishina
- 👤 Hirokazu Nomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:08
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/123; B; B05; B05D; B05D3/00; B05D3/14; B05D3/141; B05D3/142; B05D3/144; C08J7/04; C08J7/0427; C08J7/046; C08J7/048; C23; C23C; C23C14/00; C23C14/22; C23C14/56; C23C14/562; H; H04; H04Q; H04Q3/00; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; C08J2429/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31928
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
A method for the preparation of a composite shaped article of a vinyl chloride-based resin clad with a coating layer of a polyvinyl alcohol provided on the surface of the shaped article without an intervening layer of an adhesive agent which comprises the steps of (a) subjecting the surface of the shaped article of the vinyl chloride-based resin to exposure to an atmosphere of low temperature plasma of a gas having no polymerizability in plasma condition, (b) coating the thus plasma-treated surface of the shaped article with an aqueous solution containing a polyvinyl alcohol dissolved therein, and (c) drying the aqueous coating layer on the surface of the shaped article.
Claim 2
Independent Claim
110 words
A method for the preparation of a composite shaped article of a vinyl chloride-based resin clad with a coating layer of a polyvinyl alcohol provided on the surface of the shaped article without an intervening layer of an adhesive agent which comprises the steps of (a) subjecting the surface of the shaped article of the vinyl chloride-based resin to exposure to an atmosphere of low temperature plasma of a gas having no polymerizability in plasma condition, (b) coating the thus plasma-treated surface of the shaped article with an aqueous solution containing a polyvinyl alcohol dissolved therein, and (c) drying the aqueous coating layer on the surface of the shaped article.
Claim 3
Dependent Claim
29 words
The method as claimed in claim 1 wherein the step of coating is performed within 24 hours after completion of the exposure to the atmosphere to low temperature plasma.
Claim 4
Dependent Claim
25 words
The method as claimed in claim 1 wherein the step of drying is performed at a temperature in the range from 50° to 70° C.
References Cited (Backward Citations)
US3607345A
Cited
US4293585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |