US4743524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazotype composition with a non-migrating yellow coupler of controlled coupling energy
Assignee: Andrews Paper and Chemical Co Inc
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Filing: 1986-10-17
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Granted: 1988-05-10
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Expires: 2006-10-17
Abstract
Abstract Diazotypes with new yellow coupler with an active methylene group are disclosed; the couplers do not migrate and excel by their relatively reduced coupling speed for greatly improved shelf life of diazotypes. In preferred embodiments the improved new diazotypes contain acetoacetoxyethyl methacrylate or acrylate as yellow coupler.
Inventors
- 👤 Peter Muller
- 👤 Henry Mustacchi
- 👤 Leonard Kreicas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:50
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/58
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
74 words
A light-sensitive diazo coating composition which comprises; a mixture of (A) an azo coupler which is a compound of the formula: ##STR3## wherein R 1 is selected from the group consisting of hydrogen or lower alkyl and wherein R 2 is selected from the group consisting of acetoacetyloxyalkyl, in a proportion sufficient to couple the diazonium compound (B) described below; (B) a light-sensitive diazonium compound; and (C) a stabilizing proportion of an acid stabilizer.
Claim 2
Dependent Claim
74 words
A light-sensitive diazo coating composition which comprises; a mixture of (A) an azo coupler which is a compound of the formula: ##STR3## wherein R 1 is selected from the group consisting of hydrogen or lower alkyl and wherein R 2 is selected from the group consisting of acetoacetyloxyalkyl, in a proportion sufficient to couple the diazonium compound (B) described below; (B) a light-sensitive diazonium compound; and (C) a stabilizing proportion of an acid stabilizer.
Claim 3
Dependent Claim
29 words
The composition of claim 1 wherein the compound of formula (I) is selected from the group consisting of methacrylate and acrylate esters of the hydroxyalkylester of aceto acetic acid.
Claim 4
Dependent Claim
12 words
The composition of claim 2 wherein the compound is acetoacet oxyethyl methacrylate.
Claim 5
Dependent Claim
24 words
A light sensitive diazotype reproduction material which comprises: a base support; and a coating on the support, which comprises the composition of claim 1.
References Cited (Backward Citations)
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US3149972A
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |