US4009037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated synthetic film materials
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1974-01-21
•
Granted: 1977-02-22
•
Expires: 1994-01-21
Abstract
Abstract Improving the adhesion of a gelatin coating to a styrene homopolymer or copolymer film by solvent treating and corona discharge treating the film prior to coating with a gelatin layer in the production of a coated photobase.
Inventors
- 👤 David Roderick Mann
- 👤 James Albert Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:24
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/02; B; B29; B29D; B29D7/00; G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/915; G03C1/93; C08J2325/00; C08J2325/02; C08J2325/04; Y; Y10; Y10S; Y10S430/00; Y10S430/155
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
A process for producing a light transmitting coated synthetic film material, which comprises pretreating the surface of a styrene homopolymer or copolymer film and coating said surface with a gelatin-containing layer, the pretreating step consisting of treating the film surface with a solvent for the film without whitening so as to make said film surface porous to said gelatin-containing layer thereby enabling said gelatin-containing layer to penetrate into said film to a greater depth than when said film is not treated with a solvent, drying the solvent, and subsequently corona discharge treating the solvent treated surface.
Claim 2
Dependent Claim
96 words
A process for producing a light transmitting coated synthetic film material, which comprises pretreating the surface of a styrene homopolymer or copolymer film and coating said surface with a gelatin-containing layer, the pretreating step consisting of treating the film surface with a solvent for the film without whitening so as to make said film surface porous to said gelatin-containing layer thereby enabling said gelatin-containing layer to penetrate into said film to a greater depth than when said film is not treated with a solvent, drying the solvent, and subsequently corona discharge treating the solvent treated surface.
Claim 3
Dependent Claim
19 words
A process according to claim 1, in which the film is a copolymer of styrene with butadiene and/or acrylonitrile.
Claim 4
Dependent Claim
23 words
A process according to claim 2, in which the film is a copolymer of 95% by weight styrene and 5% by weight butadiene.
Claim 5
Dependent Claim
24 words
A process according to claim 1, in which the solvent is methyl ethyl ketone; toluene; 1,1,1-trichloroethane; acetone; methylene chloride; methyl acetate and/or ethyl acetate.
Claim 6
Dependent Claim
25 words
A process according to claim 1, in which a wet coat weight of about 100 mg/dm 2 of solvent is applied to the film surface.
Claim 7
Dependent Claim
23 words
A process according to claim 1, in which contact between the film surface and the solvent is maintained for 0.5 to 4.0 seconds.
Claim 8
Dependent Claim
28 words
A process according to claim 1, in which the gelatin layer is a subbing layer and is dried for up to 60 seconds at 50° to 80° C.
Claim 9
Dependent Claim
22 words
A process according to claim 7, in which the gelatin subbing layer is dried at 60° C for 10 to 30 seconds.
Claim 10
Dependent Claim
24 words
A process according to claim 1, in which a light sensitive emulsion layer and/or an anti-halation layer is applied to the gelatin subbing layer.
Claim 11
Dependent Claim
14 words
A light transmitting coated synthetic film produced according to the process of claim 1.
References Cited (Backward Citations)
US3475193A
Cited
US3415683A
Cited
US3549406A
Cited
US3705808A
Cited
US3697305A
Cited
US3837886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-22 | 1980-08-23 | 1981-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-22 | 1984-08-23 | 1985-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-22 | 1988-08-23 | 1989-02-22 | $7700.00 | Window Closed / Lapsed |