US4556625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Development of a colored image on a cellulosic material with monosulfonyl azides
Assignee: Armstrong World Industries Inc
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Filing: 1983-11-25
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Granted: 1985-12-03
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Expires: 2003-11-25
Abstract
Abstract The present invention discloses a method of photolytically developing a colored image on a cellulosic material. In this method, the material is contacted with a nitrogen containing polymer in solution and a mono-sulfonyl azide compound in solution. The sample is thereafter exposed to a UV-containing light source for an amount of time sufficient to develop a color thereon.
Inventors
- 👤 Ronald S. Lenox
- 👤 Anne L. Schwartz
- 👤 Charles E. Hoyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:03
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/52; D06P1/54; D06P1/64; D06P1/642; D06P1/6423; D21; D21H; D21H21/00; D21H21/14; D21H21/28; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/12; Y10S430/128; Y10S8/00; Y10S8/92; Y10S8/921
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
90 words
A method of photolytically coloring a cellulosic material by contacting a surface thereof with a solution of poly(N-vinylcarbazole) and a solution of at least one monosulfonyl azide compound of the formula R--SO.sub.2 N.sub.3 wherein R is an aliphatic, aryl aliphatic or aryl radical which contains from 1 to about 25 carbon atoms, to thereby form an admixture on the treated surface of the material, and exposing the treated material to a UV-containing light source to thereby render the admixture solvent insoluble and to photolytically develop a color on the material.
Claim 2
Independent Claim
90 words
A method of photolytically coloring a cellulosic material by contacting a surface thereof with a solution of poly(N-vinylcarbazole) and a solution of at least one monosulfonyl azide compound of the formula R--SO.sub.2 N.sub.3 wherein R is an aliphatic, aryl aliphatic or aryl radical which contains from 1 to about 25 carbon atoms, to thereby form an admixture on the treated surface of the material, and exposing the treated material to a UV-containing light source to thereby render the admixture solvent insoluble and to photolytically develop a color on the material.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein R contains from 2 to about 15 carbon atoms.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein R contains from 4 to 12 carbon atoms.
Claim 5
Dependent Claim
11 words
The method of claim 1 wherein R is an aryl radical.
Claim 6
Dependent Claim
11 words
The method of claim 1 wherein R is an aliphatic radical.
Claim 7
Dependent Claim
28 words
The method of claim 1 wherein the poly(N-vinylcarbazole) and the azide compound are together in solution in at least one solvent for the poly(N-vinylcarbazole) and the azide compound.
Claim 8
Dependent Claim
21 words
The method of claim 6 wherein the solution contains at least 0.001 grams of the azide compound per deciliter of solvent.
Claim 9
Dependent Claim
20 words
The method of claim 6 wherein the solution contains at least 0.001 grams of the poly(N-vinylcarbazole) per deciliter of solvent.
Claim 10
Dependent Claim
31 words
The method of claim 1 wherein the treated surface is selectively exposed through a mask to the UV containing light source so that the surface will have exposed and unexposed areas.
Claim 11
Dependent Claim
28 words
The method of claim 9 wherein the unexposed areas are contacted with at least one olefin that is heated at temperatures ranging from 50° C. to 200° C.
Claim 12
Dependent Claim
23 words
The method of claim 10 wherein at least one olefin is selected from the group consisting of dicyclopentadiene, dipentene, 1-hexene, 1-decene and diisobutylene.
Claim 13
Dependent Claim
25 words
The method of claim 9 wherein the unexposed areas are contacted with turpentine that is heated at temperatures ranging from 50° C. to 200° C.
Claim 14
Dependent Claim
21 words
The method of claim 9 wherein the unexposed areas are contacted with an aqueous or alcohol solution of a reducing agent.
Claim 15
Dependent Claim
13 words
The method of claim 13 wherein the reducing agent is NaBH 4 .
Claim 16
Dependent Claim
17 words
The method of claim 13 wherein the reducing agent is Na 2 S 2 O 4 .
References Cited (Backward Citations)
US1926322A
Cited
US2861863A
Cited
US3227510A
Cited
US3282693A
Cited
US3467518A
Cited
US3462268A
Cited
US3630735A
Cited
US4243390A
Cited
US4287294A
Cited
US4451551A
Cited
US4322211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-02 | 1989-06-03 | 1989-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-02 | 1993-06-03 | 1993-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-02 | 1997-06-03 | 1997-12-03 | $7700.00 | Window Closed / Lapsed |