US4198478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for dispersing a photographic additive
Assignee: Fujifilm Holdings Corp
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Filing: 1978-05-10
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Granted: 1980-04-15
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Expires: 1998-05-10
Abstract
Abstract A method for dispersing an oil-soluble photographic additive which comprises dissolving the additive in an organic solvent and dispersing the resulting solution of the photographic additive in water or a hydrophilic colloid composition in the presence of a surface active polymer comprising (a) a homopolymer of units represented by the formula (I): ##STR1## wherein R is an aliphatic hydrocarbon group having 4 to 22 carbon atoms; m 1 and m 2 each is 0 or 1; B is --O-- or --NH--; A is a divalent aliphatic group having 1 to 50 carbon atoms; and M is a hydrogen atom or a cation group capable of forming a salt with a sulfonic acid group, or (b) a copolymer containing at least 5 mol% of units represented by the formula (I) above and the balance of divalent units copolymerizable therewith and comprising at least one of a benzene ring having a methylene group attached thereto and a naphthalene ring having a methylene group attached thereto.
Inventors
- 👤 Masakazu Yoneyama
- 👤 Jiro Yamaguchi
- 👤 Takeshi Mikami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:56
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/38; G03C1/04; G03C1/053; G03C7/00; G03C7/30; G03C7/388; G03C7/3882; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
191 words
A method for dispersing at least one oil-soluble photographic additive in water or a hydrophilic colloid composition which comprises dissolving said photographic additive in at least one organic solvent and dispersing the resulting organic solvent solution of the photographic additive in water or in a hydrophilic colloid composition in the presence of a surface active polymer comprising (a) a homopolymer of units represented by the formula (I): ##STR13## wherein R represents an aliphatic hydrocarbon group having 4 to 22 carbon atoms; m 1 and m 2 each represents 0 or 1; B represents --O-- or --NH--; A represents a divalent aliphatic group having 1 to 50 carbon atoms; and M represents a hydrogen atom or a cation capable of forming a salt with a sulfonic acid group, or (b) a copolmyer containing at least 5 mol% of units represented by the formula (I) above and the balance of divalent units copolymerizable therewith and comprising at least one of a benzene ring having a methylene group attached thereto and a naphthalene ring having a methylene group attached thereto, wherein the surface active polymer is in the water, hydrophilic colloid or organic solvent.
Claim 2
Independent Claim
191 words
A method for dispersing at least one oil-soluble photographic additive in water or a hydrophilic colloid composition which comprises dissolving said photographic additive in at least one organic solvent and dispersing the resulting organic solvent solution of the photographic additive in water or in a hydrophilic colloid composition in the presence of a surface active polymer comprising (a) a homopolymer of units represented by the formula (I): ##STR13## wherein R represents an aliphatic hydrocarbon group having 4 to 22 carbon atoms; m 1 and m 2 each represents 0 or 1; B represents --O-- or --NH--; A represents a divalent aliphatic group having 1 to 50 carbon atoms; and M represents a hydrogen atom or a cation capable of forming a salt with a sulfonic acid group, or (b) a copolmyer containing at least 5 mol% of units represented by the formula (I) above and the balance of divalent units copolymerizable therewith and comprising at least one of a benzene ring having a methylene group attached thereto and a naphthalene ring having a methylene group attached thereto, wherein the surface active polymer is in the water, hydrophilic colloid or organic solvent.
Claim 3
Dependent Claim
21 words
The method for dispersing a photographic additive as claimed in claim 1, wherein said oil-soluble photographic additive is an oil-soluble coupler.
Claim 4
Dependent Claim
21 words
The method for dispersing a photographic additive as claimed in claim 1, wherein said oil-soluble photographic additive is an oil-soluble antioxidant.
Claim 5
Dependent Claim
28 words
The method for dispersing a photographic additive as claimed in claim 1, wherein said oil-soluble photographic additive is a dye releasing compound for the color diffusion transfer method.
Claim 6
Dependent Claim
23 words
The method for dispersing a photographic additive as claimed in claim 1, wherein said oil-soluble photographic additive is an oil-soluble ultraviolet light absorbant.
Claim 7
Dependent Claim
27 words
The method for dispersing a photographic additive as claimed in claim 1, wherein the surface active polymer has a molecular weight of about 600 to about 10,000.
Claim 8
Dependent Claim
25 words
The method for dispersing a photographic additive as claimed in claim 6, wherein the surface active polymer has a molecular weight of 900 to 5,000.
Claim 9
Dependent Claim
34 words
The method for dispersing a photographic additive as claimed in claim 1, wherein said surface active polymer is a surface active copolymer containing 5 to 95 mol% of units represented by the formula (I).
Claim 10
Dependent Claim
37 words
The method for dispersing a photographic additive as claimed in claim 1, wherein said unit copolymerizable therewith is at least one of ##STR14## wherein R 0 represents an aliphatic hydrocarbon group having 2 to 22 carbon atoms.
References Cited (Backward Citations)
US3415649A
Cited
US3860425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |