US4008088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion picture film materials containing magnetic recording stripes
Assignee: Agfa Gevaert NV
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Filing: 1975-05-20
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Granted: 1977-02-15
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Expires: 1995-05-20
Abstract
Abstract A multilayer motion picture film material comprises a support, at least one light-sensitive emulsion layer on one side of the support, and at the opposite side of the support an antihalation layer capable of being removed from the support in the presence of an alkaline solution. On this antihalation layer at least one stripe is applied from a coating composition containing magnetizable material dispersed in an alkali-insoluble binder and also containing a cross-linking agent for the alkali-soluble binder of the antihalation layer. As cross-linking agent is used at least one bis- or polyepoxide in combination with at least one sulphoxide and/or with formamide, the bis- or polyepoxide corresponding to one of the formulae: ##STR1## and ##STR2## wherein R represents an alkyl group of 1 to 6 carbon atoms, a benzyl group, or a group of the formula ##STR3## and each of R' and R" represents a methyl group, or a ##STR4## OR R' and R" together represent a --CH 2 --CH 2 -- group.
Inventors
- 👤 August Jean Van Paesschen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:01
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/633; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30; G03C1/306; G03C1/76; G03C1/91; G03C1/93; G03C5/00; G03C5/12; G03C5/14; Y; Y10; Y10S; Y10S428/00; Y10S428/90
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
174 words
A multilayer motion picture film material comprising a support, at least one light-sensitive emulsion layer on one side of such support and, at the opposite side of said support, an antihalation layer capable of being removed from said support in the presence of an alkaline solution, and also comprising, on said antihalation layer, at least one stripe formed by the application thereto of a coating composition containing magnetizable material dispersed in an alkali-insoluble binder, said composition containing a cross-linking agent for the alkali-soluble binder of said antihalation layer, characterized in that as a said cross-linking agent, at least one bis- or polyepoxide is used in combination with at least one sulphoxide and/or formamide, said bis- or polyepoxide corresponding to one of the formulae: ##STR13## and ##STR14## wherein R represents an alkyl group of 1 to 6 carbon atoms, a benzyl group, or a group of the formula ##STR15## and each of R' and R" represents a methyl group, or a ##STR16## or R' and R" together represent a --CH 2 --CH.sub. 2 -- group.
Claim 2
Dependent Claim
174 words
A multilayer motion picture film material comprising a support, at least one light-sensitive emulsion layer on one side of such support and, at the opposite side of said support, an antihalation layer capable of being removed from said support in the presence of an alkaline solution, and also comprising, on said antihalation layer, at least one stripe formed by the application thereto of a coating composition containing magnetizable material dispersed in an alkali-insoluble binder, said composition containing a cross-linking agent for the alkali-soluble binder of said antihalation layer, characterized in that as a said cross-linking agent, at least one bis- or polyepoxide is used in combination with at least one sulphoxide and/or formamide, said bis- or polyepoxide corresponding to one of the formulae: ##STR13## and ##STR14## wherein R represents an alkyl group of 1 to 6 carbon atoms, a benzyl group, or a group of the formula ##STR15## and each of R' and R" represents a methyl group, or a ##STR16## or R' and R" together represent a --CH 2 --CH.sub. 2 -- group.
Claim 3
Dependent Claim
61 words
A multilayer motion picture film material according to claim 1 wherein said coating composition containing magnetizable material comprises 1 to 5% by weight of bis- or polyepoxide in respect of the total weight of solid material in said coating composition and from 1 to 10% by volume of sulphoxide or formamide in respect of the total volume of the coating composition.
Claim 4
Dependent Claim
18 words
A multilayer motion picture film material according claim 1, wherein the support is a film of cellulose triacetate.
Claim 5
Dependent Claim
19 words
A multilayer motion picture film material according to claim 1, wherein the support is a film of polyethylene terephthalate.
Claim 6
Dependent Claim
42 words
A multilayer motion picture film material according to claim 1, wherein the alkali-soluble binder for said antihalation layer is cellulose acetate phthalate having a degree of acetyl substitution between 1.0 and 1.7 and a degree of phthalyl substitution between 0.6 and 1.2.
Claim 7
Dependent Claim
36 words
A multilayer motion picture film material according to claim 1, wherein the alkali-soluble binder for said antihalation layer is formed of a copolymer of vinyl acetate and crotonic acid containing 7.8% by weight of crotonic acid.
Claim 8
Dependent Claim
32 words
A multilayer motion picture film material according to claim 1, wherein the alkali-soluble binder for said antihalation layer is a copolymer of ethyl acrylate, methyl methacrylate and methacrylic acid (10:70:20% by weight).
Claim 9
Dependent Claim
22 words
A multilayer motion picture film material according to claim 1, wherein N,N-bis (2,3-epoxypropyl)-isopropylamine is used as the or a said cross-linking agent.
Claim 10
Dependent Claim
22 words
A multilayer motion picture film material according to claim 1, wherein N,N-bis (2,3-epoxypropyl)-ethylamine is used as the or a said cross-linking agent.
Claim 11
Dependent Claim
21 words
A multilayer motion picture film material according to claim 1, wherein N,N'-bis(2,3-epoxypropyl)-piperazine is used as the or a said cross-linking agent.
Claim 12
Dependent Claim
25 words
A multilayer motion picture film material according to claim 1, wherein at least one said bis- or polyepoxide is used in combination with dimethyl sulphoxide.
References Cited (Backward Citations)
US3808136A
Cited
US3704167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |