US4039333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic materials having improved anti-halation layers
Assignee: Fujifilm Holdings Corp
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Filing: 1976-04-14
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Granted: 1977-08-02
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Expires: 1996-04-14
Abstract
Abstract An anti-halation layer for photographic materials comprising at least one first binder which is swollen by an aqueous alkaline solution and comprises about 10 to about 25% by weight of alkyl acrylate units, 52 to 65% by weight of alkyl methacrylate units and about 18 to about 30% by weight of suitable acid monomer units, and at least a second binder agent which is soluble in an alkaline aqueous solution but which can withstand a strongly alkaline preliminary bath and is readily stripped away only at a successive rinsing operation.
Inventors
- 👤 Yukio Shinagawa
- 👤 Yasumasa Yamaguchi
- 👤 Shuichi Shindo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:53
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/835
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
A photographic material having an anti-halation layer comprising at least one aqueous alkali solution swellable binder and at least one aqueous alkali solution soluble binder, said aqueous alkali solution swellable binder being a terpolymer comprising about 10 to about 25% by weight of an alkyl acrylate unit where said alkyl group contains from 1 to 4 carbon atoms, 52 to 65% by weight of an alkyl methacrylate unit where said alkyl group contains from 1 to 4 carbon atoms, and about 18 to about 30% by weight of an acid monomer selected from acrylic, methacrylic or itaconic acid; and said aqueous alkali solution soluble binder having a molecular weight of from about 10,000 to about 200,000.
Claim 2
Dependent Claim
116 words
A photographic material having an anti-halation layer comprising at least one aqueous alkali solution swellable binder and at least one aqueous alkali solution soluble binder, said aqueous alkali solution swellable binder being a terpolymer comprising about 10 to about 25% by weight of an alkyl acrylate unit where said alkyl group contains from 1 to 4 carbon atoms, 52 to 65% by weight of an alkyl methacrylate unit where said alkyl group contains from 1 to 4 carbon atoms, and about 18 to about 30% by weight of an acid monomer selected from acrylic, methacrylic or itaconic acid; and said aqueous alkali solution soluble binder having a molecular weight of from about 10,000 to about 200,000.
Claim 3
Dependent Claim
22 words
The photographic material as claimed in claim 1, wherein said terpolymer has a molecular weight of from about 5,000 to about 200,000.
Claim 4
Dependent Claim
20 words
The photographic material as claimed in claim 2, wherein said terpolymer has a molecular weight of from 10,000 to 100,000.
Claim 5
Dependent Claim
22 words
The photographic material as claimed in claim 1, wherein said aqueous alkali solution soluble binder contains at least one free carboxyl group.
Claim 6
Dependent Claim
29 words
The photographic material as claimed in claim 4, wherein said soluble binder is a copolymer containing an organic acid, a cellulose derivative containing carboxy group, or a mixture thereof.
Claim 7
Dependent Claim
25 words
The photographic material as claimed in claim 4, wherein said copolymer is a copolymer of maleic acid or maleic anhydride and styrene or vinyl acetate.
Claim 8
Dependent Claim
24 words
The photographic material as claimed in claim 6 wherein said copolymer comprises from about 30 to about 60 mol% maleic acid or maleic anhydride.
Claim 9
Dependent Claim
27 words
The photographic material as claimed in claim 5, wherein said cellulose derivative is cellulose acetate phthalate, cellulose acetate maleate, hydroxypropylmethylcellulose hexahydrophthalate, hydroxypropylmethylcellulose acetylphthalate or cellulose acetate succinate.
References Cited (Backward Citations)
US3764587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |