US3947337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
α,ω-Diarylpolyene photosensitizers for sulfonylazide polymers
Assignee: Dow Chemical Co
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Filing: 1974-12-23
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Granted: 1976-03-30
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Expires: 1994-12-23
Abstract
Abstract A novel class of compounds is disclosed of the formula ##SPC1## Wherein R 1 and R 2 are lower-alkoxy or di(lower-alkyl)amino and R 1 can be hydrogen and R 3 and R 4 are hydrogen, lower-alkoxy or di(lower-alkyl)amino and n is an integer from 1 to 5. The compounds are sensitizers for photosensitive compounds particularly polymers containing sulfonazido groups as the light-sensitive moiety.
Inventors
- 👤 Gerret M. Peters, Jr.
- 👤 Fred A. Stuber
- 👤 Henri Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:49
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4056; G; G03; G03F; G03F7/00; G03F7/004; G03F7/008; G03F7/0085; G03F7/027; G03F7/028; G03F7/031
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
A process for sensitizing a light-sensitive polymer containing sulfonazide groups to radiation of a wavelength greater than 400 nm said polymer being the product of reaction of a hydroxyalkyl azidosulfonyl carbanilate with a polymer selected from the class consisting of copolymers of maleic anhydride and styrene and copolymers of maleic anhydride and methyl vinyl ether which process comprises exposing said light-sensitive polymer to said radiation in the presence of a sensitizing amount of a compound having the formula: ##SPC6## wherein R 1 is selected from the group consisting of hydrogen, lower-alkoxy and di(lower-alkyl)amino, R 2 is selected from the group consisting of lower-alkoxy and di(lower-alkyl)amino, and R 3 and R 4 are independently selected from the group consisting of hydrogen, lower-alkoxy and di(lower-alkyl)amino and n is an integer from 1 to 5.
Claim 2
Dependent Claim
132 words
A process for sensitizing a light-sensitive polymer containing sulfonazide groups to radiation of a wavelength greater than 400 nm said polymer being the product of reaction of a hydroxyalkyl azidosulfonyl carbanilate with a polymer selected from the class consisting of copolymers of maleic anhydride and styrene and copolymers of maleic anhydride and methyl vinyl ether which process comprises exposing said light-sensitive polymer to said radiation in the presence of a sensitizing amount of a compound having the formula: ##SPC6## wherein R 1 is selected from the group consisting of hydrogen, lower-alkoxy and di(lower-alkyl)amino, R 2 is selected from the group consisting of lower-alkoxy and di(lower-alkyl)amino, and R 3 and R 4 are independently selected from the group consisting of hydrogen, lower-alkoxy and di(lower-alkyl)amino and n is an integer from 1 to 5.
Claim 3
Dependent Claim
12 words
A process according to claim 1 wherein the sensitizing compound is 1,4-di(4-dimethylaminophenyl)-1,3-butadiene.
Claim 4
Dependent Claim
23 words
A process according to claim 1 wherein the sensitizing compound has the formula: ##SPC7## wherein n is an integer from 2 to 4.
Claim 5
Dependent Claim
12 words
A process according to claim 1 wherein the sensitizing compound is 1-(2,5-dimethoxyphenyl)-4-(4-dimethylaminophenyl)-1,3-butadiene.
Claim 6
Dependent Claim
12 words
A process according to claim 1 wherein the sensitizing compound is 1-(2,5-dimethoxyphenyl)-6-(4-dimethylaminophenyl)-1,3,5-hexatriene.
References Cited (Backward Citations)
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US3721566A
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US3714194A
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US3804628A
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US3770846A
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US3843603A
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US3865597A
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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) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |