US4492748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive polycondensation product containing diazonium and dialdehyde groups, and light-sensitive recording material prepared therewith
Assignee: Hoechst AG
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Filing: 1982-09-08
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Granted: 1985-01-08
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Expires: 2002-09-08
Abstract
Abstract A light-sensitive diazonium group-containing polycondensation product of a diazonium salt corresponding to the general formula ##STR1## wherein R 1 , R 2 , and R 3 denote hydrogen atoms, halogen atoms, alkyl groups having 1 to 3 carbon atoms or alkoxy groups having 1 to 6 carbon atoms, and X denotes the anion of the diazonium salt, and an aldehyde selected from the group consisting of dialdehydes, acetals of dialdehyde hydrates, and esters of dialdehyde hydrates, a process for producing such a light-sensitive polycondensation product and a light-sensitive recording material comprising a layer support and a light-sensitive layer containing such a light-sensitive polycondensation product.
Inventors
- 👤 Walter Lutz
- 👤 Hartmut Steppan
- 👤 Fritz Erdmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:48
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/06; C08G12/08; G; G03; G03F; G03F7/00; G03F7/004; G03F7/016; G03F7/021
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
77 words
A light-sensitive diazonium group-containing polycondensation product of a diazonium salt corresponding to the general formula ##STR5## wherein R 1 , R 2 , and R 3 denote hydrogen atoms, halogen atoms, alkyl groups having 1 to 3 carbon atoms, or alkoxy groups having 1 to 6 carbon atoms, and X denotes the anion of the diazonium salt, and an aldehyde selected from the group consisting of aromatic dialdehydes, acetals of dialdehyde hydrates, and esters of dialdehyde hydrates.
Claim 2
Dependent Claim
77 words
A light-sensitive diazonium group-containing polycondensation product of a diazonium salt corresponding to the general formula ##STR5## wherein R 1 , R 2 , and R 3 denote hydrogen atoms, halogen atoms, alkyl groups having 1 to 3 carbon atoms, or alkoxy groups having 1 to 6 carbon atoms, and X denotes the anion of the diazonium salt, and an aldehyde selected from the group consisting of aromatic dialdehydes, acetals of dialdehyde hydrates, and esters of dialdehyde hydrates.
Claim 3
Dependent Claim
15 words
A light-sensitive polycondensation product according to claim 1, wherein said aldehyde is an aromatic dialdehyde.
Claim 4
Dependent Claim
18 words
A light-sensitive polycondensation product according to claim 2, wherein said aromatic dialdehyde contains one or two non-fused rings.
Claim 5
Dependent Claim
24 words
A light-sensitive polycondensation product according to claim 1, wherein said diazonium salt is selected from the group consisting of diphenylamine-4-diazonium salts and 3-methoxydiphenylamine-4-diazonium salts.
Claim 6
Dependent Claim
19 words
A light-sensitive polycondensation product according to claim 1, containing from 0.15 to 2 dialdehyde units per diazonium salt unit.
Claim 7
Dependent Claim
19 words
A light-sensitive polycondensation product according to claim 5, containing from 0.35 to 1.2 dialdehyde units per diazonium salt unit.
Claim 8
Dependent Claim
33 words
A light-sensitive polycondensation product according to claim 1, wherein said aldehyde is selected from the group consisting of o-phthalic dialdehyde, terephthalic dialdehyde, diphenyl-4,4'-dialdehyde, diphenylether-4,4'-dialdehyde-tetramethylacetal, glyoxal tetraacetate, glyoxal tetraethylacetal, 1,1,3,3-tetraethoxy-propane, and succinic dialdehyde tetraethylacetal.
Claim 9
Dependent Claim
86 words
A process for preparing a light-sensitive diazonium group-containing polycondensation product comprising reacting a diazonium salt corresponding to the general formula: ##STR6## wherein R 1 , R 2 , and R 3 denote hydrogen atoms, halogen atoms, alkyl groups having 1 to 3 carbon atoms or alkoxy groups having 1 to 6 carbon atoms, and X denotes the anion of the diazonium salt and aldehyde selected from the group consisting of aromatic dialdehydes, acetals of dialdehyde hydrates and esters of dialdehyde hydrates in a strongly acid medium.
Claim 10
Dependent Claim
86 words
A process for preparing a light-sensitive diazonium group-containing polycondensation product comprising reacting a diazonium salt corresponding to the general formula: ##STR6## wherein R 1 , R 2 , and R 3 denote hydrogen atoms, halogen atoms, alkyl groups having 1 to 3 carbon atoms or alkoxy groups having 1 to 6 carbon atoms, and X denotes the anion of the diazonium salt and aldehyde selected from the group consisting of aromatic dialdehydes, acetals of dialdehyde hydrates and esters of dialdehyde hydrates in a strongly acid medium.
Claim 11
Dependent Claim
18 words
A process according to claim 8, wherein the polycondensation product is recovered in the form of a salt.
Claim 12
Dependent Claim
92 words
A light-sensitive recording material comprising a layer support and a light-sensitive layer containing as the light-sensitive compound, a diazonium group-containing polycondensation product of a diazonium salt corresponding to the general formula ##STR7## wherein R 1 , R 2 and R 3 denote hydrogen atoms, halogen atoms, alkyl groups having 1 to 3 carbon atoms or alkoxy groups having 1 to 6 carbon atoms, and X denotes the anion of the diazonium salt, and an aldehyde selected from the group consisting of aromatic dialdehydes, acetals of dialdehyde hydrates, and esters of dialdehyde hydrates.
Claim 13
Dependent Claim
92 words
A light-sensitive recording material comprising a layer support and a light-sensitive layer containing as the light-sensitive compound, a diazonium group-containing polycondensation product of a diazonium salt corresponding to the general formula ##STR7## wherein R 1 , R 2 and R 3 denote hydrogen atoms, halogen atoms, alkyl groups having 1 to 3 carbon atoms or alkoxy groups having 1 to 6 carbon atoms, and X denotes the anion of the diazonium salt, and an aldehyde selected from the group consisting of aromatic dialdehydes, acetals of dialdehyde hydrates, and esters of dialdehyde hydrates.
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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) | 1988-01-08 | 1988-07-09 | 1989-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-08 | 1992-07-09 | 1993-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-08 | 1996-07-09 | 1997-01-08 | $7700.00 | Window Closed / Lapsed |