US4022624A
Expired / Lapsed
US
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Desensitizer composition
Assignee: Fujifilm Holdings Corp
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Filing: 1975-05-14
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Granted: 1977-05-10
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Expires: 1995-05-14
Abstract
Abstract A desensitizer composition for desensitizing a developer against coloring a substantially colorless color former comprising as a desensitizing agent at least one N-(aminoalkyl)-lactam of the formula ##STR1## wherein n is 2 to 11, m is 2 to 6 and each methylene group can be substituted with an alkyl or aryl group, or a derivative thereof. The desensitizing composition exhibits a strong desensitization effect.
Inventors
- 👤 Akio Miyamoto
- 👤 Hiroharu Matsukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:05
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/128
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
50 words
A desensitizer composition in combination with an electron accepting developer for desensitizing said developer against coloring a substantially colorless color former wherein said desensitizer composition contains at least one N-(aminoallyl)-lactam chosen from the group consisting of N-(aminoalkyl)-lactam, N-(3-aminopropyl)-β-propiolactam, N-(3-aminopropyl)-γ-butyrolactam, N-(2-methyl-3-aminopropyl)-γ-butyrolactam, N-(3-aminopropyl)-(β-methyl)-γ-butyrolactam, N-(3-aminohexyl)-γ-butyrolactam, N-(4-aminobutyl)-γ-butyrolactam, N-(3-aminopropyl)-ε-valerolactam, N-(2-aminoethyl)-ε-caprolactam, N-(3-aminopropyl)-ε-caprolactam, N-(6-aminohexyl)-ε-caprolactam, N-(3-aminopropyl)-7-caprylactam, or N-(3-aminopropyl)-λ-laurylolactam.
Claim 2
Dependent Claim
50 words
A desensitizer composition in combination with an electron accepting developer for desensitizing said developer against coloring a substantially colorless color former wherein said desensitizer composition contains at least one N-(aminoallyl)-lactam chosen from the group consisting of N-(aminoalkyl)-lactam, N-(3-aminopropyl)-β-propiolactam, N-(3-aminopropyl)-γ-butyrolactam, N-(2-methyl-3-aminopropyl)-γ-butyrolactam, N-(3-aminopropyl)-(β-methyl)-γ-butyrolactam, N-(3-aminohexyl)-γ-butyrolactam, N-(4-aminobutyl)-γ-butyrolactam, N-(3-aminopropyl)-ε-valerolactam, N-(2-aminoethyl)-ε-caprolactam, N-(3-aminopropyl)-ε-caprolactam, N-(6-aminohexyl)-ε-caprolactam, N-(3-aminopropyl)-7-caprylactam, or N-(3-aminopropyl)-λ-laurylolactam.
Claim 3
Dependent Claim
35 words
The desensitizer composition as claimed in claim 1, wherein said electron accepting developer is a clay mineral, an organic acid, an acid polymer, a metal salt of an aromatic carboxylic acid or a mixture thereof.
Claim 4
Dependent Claim
42 words
The desensitizer composition as claimed in claim 2 wherein said electron accepting developer is terra alba, attapulgite, tannic acid, gallic acid, propyl gallate, a phenolformaldehyde resin, a phenol-acetylene condensation resin, zinc salicylate, tin salicylate, zinc 2-hydroxynaphthoate, zinc 3,5-di-tert-butyl-salicylate or a mixture thereof.
Claim 5
Dependent Claim
20 words
The desensitizer composition as claimed in claim 1, in combination with a substantially colorless, electron donating color forming organic compound.
Claim 6
Dependent Claim
31 words
The desensitizer composition as claimed in claim 4, wherein said color forming organic compound is a triarylmethane compound, a diphenylmethane compound, a xanthene compound, a thiazine compound or a spiropyran compound.
Claim 7
Dependent Claim
60 words
A process for desensitizing a developer against coloring a substantially colorless color former, which comprises contacting said developer with a desensitizer composition containing at least one N-(aminoalkyl)-lactam of the following general formula ##STR4## wherein n is 2 to 11, m is 2 to 6 and each methylene group may bw substituted with an alkyl or an aryl group, or a.
Claim 8
Dependent Claim
60 words
A process for desensitizing a developer against coloring a substantially colorless color former, which comprises contacting said developer with a desensitizer composition containing at least one N-(aminoalkyl)-lactam of the following general formula ##STR4## wherein n is 2 to 11, m is 2 to 6 and each methylene group may bw substituted with an alkyl or an aryl group, or a.
Claim 9
Dependent Claim
36 words
The process as claimed in claim 6, wherein said N-(aminoalkyl)-lactam is N-(3-aminopropyl)-β -propiolactam, N-(3-aminopropyl)- γ-butyrolactam, N-(2-methyl-3-aminopropyl)-γ -butyrolactam, N-(3-aminopropyl)-(β -methyl)- γ-butyrolactam, N-(6-aminohexyl)-γ -butyrolactam, N-(4-aminobutyl)- γ-butyrolactam, N-(3-aminopropyl)- δ-valerolactam, N-(2-aminoethyl)-ε -caprolactam, N-(3-aminopropyl)- ε-caprolactam, N-(6-aminohexyl)-ε -caprolactam, N-(3-aminopropyl)-7-caprylolactam, or N-(3-aminopropyl)- λ-laurylolactam.
Claim 10
Dependent Claim
15 words
The process as claimed in claim 6, wherein said desensitizer composition also contains a pigment.
Claim 11
Dependent Claim
27 words
The process as claimed in claim 8, wherein said pigment is titanium dioxide, zinc oxide, barium sulfate, magnesium carbonate, calcium carbonate, barium carbonate, magnesium hydroxide or talc.
Claim 12
Dependent Claim
20 words
The process as claimed in claim 9, wherein said desensitizer composition also contains an off-setting inhibitor and/or another different desensitizer.
Claim 13
Dependent Claim
15 words
The process as claimed in claim 6, wherein said developer is an electron accepting developer.
Claim 14
Dependent Claim
34 words
The process as claimed in claim 11, wherein said electron accepting developer is a clay mineral, an organic acid, an acid polymer, a metal salt of an aromatic carboxylic acid or a mixture thereof.
Claim 15
Dependent Claim
41 words
The process as claimed in claim 12, wherein said electron accepting developer is terra alba, attapulgite, tannic acid, gallic acid, propyl gallate, a phenolformaldehyde resin, a phenol-acetylene condensation resin, zinc salicylate, tin salicylate, zinc 2-hydroxynaphthoate, zinc 3,5-di-tert-butylsalicylate or a mixture thereof.
Claim 16
Dependent Claim
21 words
The process as claimed in claim 6, wherein said color former is a substantially colorless, electron donating color forming organic compound.
Claim 17
Dependent Claim
30 words
The process as claimed in claim 14, wherein said color forming organic compound is a triarylmethane compound, a diphenylmethane compound, a xanthene compound, a thiazine compound or a spiropyran compound.
Claim 18
Dependent Claim
30 words
The process as claimed in claim 6, wherein said color former is a substantially colorless, electron donating color forming organic compound and wherein said developer is an electron accepting developer.
References Cited (Backward Citations)
US3671482A
Cited
US3838160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |