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US4429032A
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Surface-treated vinyl chloride polymer material including an adhering hydrophilic layer
Assignee: Agfa Gevaert NV
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Filing: 1982-05-10
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Granted: 1984-01-31
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Expires: 2002-05-10
Abstract
Abstract The adherence of a hydrophilic layer containing a hydrophilic colloid binder upon the surface of a vinyl chloride polymer free of hydrophilic recurring units is improved by exposing the polymer surface to a corona discharge sufficient to satisfy a particular wetting test described in the specification, and colloidal silica is dispersed within the hydrophilic layer in a weight ratio range relative to the binder of 1:5-2:1.
Inventors
- 👤 Herman L. Matthe
- 👤 Lucien J. Van Gossum
- 👤 Ludovicus M. Mertens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:50
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/915; G03C1/795; G03C8/00; G03C8/42; G03C8/52; Y; Y10; Y10S; Y10S430/00; Y10S430/155; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31667; Y10T428/31855; Y10T428/31909; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
174 words
A material comprising a vinyl chloride polymer layer free of hydrophilic monomeric units and an adhering hydrophilic layer, wherein the adhesivity of the surface of the vinyl chloride polymer layer to said adhering layer has been improved by a treatment with a corona discharge of the uncoated vinyl chloride polymer layer surface, characterized in that said adhering layer comprises a mixture of a hydrophilic colloid binder and dispersed colloidal silica in a weight ratio of from 5/1 to 1/2, and also that said treatment of the uncoated vinyl chloride polymer layer surface with said corona discharge is sufficient to impart a degree of wettability determined by a wetting test which comprises applying to the treated uncoated vinyl chloride polymer surface a test liquid of a mixture of formamide and ethylene glycol monomethyl ether in a ratio of at least 90.7:9.3 v/v at a temperature of 20° C. over an area thereof at least 3 cm×3 cm, and said applied test liquid mixture retracts into droplets in a retraction time of at least two seconds.
Claim 2
Dependent Claim
174 words
A material comprising a vinyl chloride polymer layer free of hydrophilic monomeric units and an adhering hydrophilic layer, wherein the adhesivity of the surface of the vinyl chloride polymer layer to said adhering layer has been improved by a treatment with a corona discharge of the uncoated vinyl chloride polymer layer surface, characterized in that said adhering layer comprises a mixture of a hydrophilic colloid binder and dispersed colloidal silica in a weight ratio of from 5/1 to 1/2, and also that said treatment of the uncoated vinyl chloride polymer layer surface with said corona discharge is sufficient to impart a degree of wettability determined by a wetting test which comprises applying to the treated uncoated vinyl chloride polymer surface a test liquid of a mixture of formamide and ethylene glycol monomethyl ether in a ratio of at least 90.7:9.3 v/v at a temperature of 20° C. over an area thereof at least 3 cm×3 cm, and said applied test liquid mixture retracts into droplets in a retraction time of at least two seconds.
Claim 3
Dependent Claim
38 words
Material according to claim 1, characterized in that the corona treatment of the vinyl chloride polymer layer surface imparts a wettability which satisfies said wetting test using a test liquid containing at least 96.5% by volume of formamide.
Claim 4
Dependent Claim
18 words
Material according to claim 1, characterized in that the hydrophilic colloid binder of said adhering layer is gelatin.
Claim 5
Dependent Claim
27 words
Material according to claim 1, characterized in that the colloidal silica consists of silica particles having an average particle size in the range 0.1 to 0.01 μm.
Claim 6
Dependent Claim
24 words
Material according to claim 1, characterized in that in said adhering layer between 0.14 g and 1.8 g of silica are present per sq.m.
Claim 7
Dependent Claim
30 words
Material according to claim 1, characterized in that the adhering layer contains the hydrophilic colloid binder in admixture with said colloidal silica in a weight ratio range of about 2/1.
Claim 8
Dependent Claim
14 words
Material according to claim 1, characterized in that the adhering layer contains a plasticizer.
Claim 9
Dependent Claim
17 words
Material according to claim 1, characterized in that said adhering layer forms part of an image-recording material.
Claim 10
Dependent Claim
32 words
Material according to claim 8, characterized in that said adhering layer contains a photographically useful substance or serves as a subbing layer for a hydrophilic colloid layer containing a photographically useful substance.
Claim 11
Dependent Claim
29 words
Material according to claim 9, characterized in that said adhering layer contains as photographically useful substances developing nuclei acting as a catalyst in physical development of silver complex compounds.
Claim 12
Dependent Claim
38 words
Material according to claim 1, characterized in that the adhering hydrophilic layer contains said mixture of hydrophilic colloid and silica in a ratio by weight of at least 80% with respect to the total weight of said layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |