US4038253A
Expired / Lapsed
US
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Photocross-linkable polymers containing pendant diazoester groups
Assignee: Hercules LLC
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Filing: 1976-06-02
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Granted: 1977-07-26
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Expires: 1996-06-02
Abstract
Abstract It has been found that certain polymers containing pendant diazo ester groups are photosensitive and have utility in the preparation of both lithographic and relief printing plates, as well as for etching resists for printed circuits. This is a continuation of application Ser. No. 412,218, filed Nov. 2, 1973 now abandoned.
Inventors
- 👤 Brian D. Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:11
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; C; C08; C08F; C08F8/00; C08F8/30; Y; Y10; Y10S; Y10S428/00; Y10S428/901
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
A polymer photocross-linkable to actinic radiation containing the following units ##STR16## where P is derived from a soluble hydroxy containing polymer which has been esterified to give the above pendant groups and X is a radical selected from the group consisting of --H, ##STR17## --CN and --Ar, where Ar is selected from phenyl and phenyl substituted with 1 to 3 --NO 2 , Cl, F, Br, C 1-8 alkyl or C 1-5 alkyloxy groups and R is selected from C 1-18 alkyl, C 5-7 cycloalkyl, C 1-4 alkyl substituted C 5-7 cycloalkyl and Ar, where Ar is as defined above.
Claim 2
Dependent Claim
100 words
A polymer photocross-linkable to actinic radiation containing the following units ##STR16## where P is derived from a soluble hydroxy containing polymer which has been esterified to give the above pendant groups and X is a radical selected from the group consisting of --H, ##STR17## --CN and --Ar, where Ar is selected from phenyl and phenyl substituted with 1 to 3 --NO 2 , Cl, F, Br, C 1-8 alkyl or C 1-5 alkyloxy groups and R is selected from C 1-18 alkyl, C 5-7 cycloalkyl, C 1-4 alkyl substituted C 5-7 cycloalkyl and Ar, where Ar is as defined above.
Claim 3
Dependent Claim
15 words
The photosensitive polymer of claim 1 wherein the pendant diazo ester groups are diazoacetate groups.
Claim 4
Dependent Claim
15 words
The photosensitive polymer of claim 1 wherein the pendant diazo ester groups are diazomalonate groups.
Claim 5
Dependent Claim
15 words
The photosensitive polymer of claim 1 wherein the pendant diazo ester groups are acetodiazoacetate groups.
Claim 6
Dependent Claim
15 words
The photosensitive polymer of claim 1 wherein the pendant diazo ester groups are p-nitrophenyldiazoacetate groups.
References Cited (Backward Citations)
US3717592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |