US3930858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat development process utilizing a photosensitive composition containing a halogenated polymer and a strong organic electron acceptor
Assignee: Xerox Corp
•
Filing: 1973-11-01
•
Granted: 1976-01-06
•
Expires: 1993-11-01
Abstract
Abstract Disclosed is a method for forming a visible image. The method involves exposing in an imagewise manner a mixture of a halogenated polymer having halogen atoms on alternating carbon atoms and a strong organic electron acceptor to actinic radiation to induce dehydrohalogenation of the polymer. The exposed composition is then subjected to heat in order to provide a visible image.
Inventors
- 👤 William W. Limburg
- 👤 Leon A. Teuscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:15
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/733; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/108
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
106 words
A method of forming an image which comprises: a. exposing to actinic radiation in an imagewise manner a composition consisting essentially of: 1. a polymeric molecule containing a number of units characterized by the formula: ##EQU4## wherein X is chlorine, bromine, or iodine, Y and Y' are X or hydrogen and Z is Y or an alkyl, aryl or alkaryl constituent containing from 1 to 8 carbon atoms, and n percent and m percent are numbers from 0 to 100 representing the relative mole percent composition of the individual units in the polymer, sufficient to provide at least 2 conjugated double bonds upon dehydrohalogenation; and 2.
Claim 2
Independent Claim
106 words
A method of forming an image which comprises: a. exposing to actinic radiation in an imagewise manner a composition consisting essentially of: 1. a polymeric molecule containing a number of units characterized by the formula: ##EQU4## wherein X is chlorine, bromine, or iodine, Y and Y' are X or hydrogen and Z is Y or an alkyl, aryl or alkaryl constituent containing from 1 to 8 carbon atoms, and n percent and m percent are numbers from 0 to 100 representing the relative mole percent composition of the individual units in the polymer, sufficient to provide at least 2 conjugated double bonds upon dehydrohalogenation; and 2.
Claim 3
Dependent Claim
70 words
a strong organic electron acceptor which is a composition having π electron systems either on or conjugated with 2, 3 or 4 electron withdrawing groups selected from the group of cyano (CN), nitro (NO 2 ), chloro (Cl), bromo (Br) and trifluoromethyl (--CF 3 ); and b. heating the so-exposed composition to a temperature and for a time sufficient to form a visible image in the exposed areas without causing
Claim 4
Dependent Claim
70 words
a strong organic electron acceptor which is a composition having π electron systems either on or conjugated with 2, 3 or 4 electron withdrawing groups selected from the group of cyano (CN), nitro (NO 2 ), chloro (Cl), bromo (Br) and trifluoromethyl (--CF 3 ); and b. heating the so-exposed composition to a temperature and for a time sufficient to form a visible image in the exposed areas without causing
Claim 5
Dependent Claim
26 words
image formation in the non-exposed areas. 2. The method of claim 1 wherein Y is hydrogen and n percent is 100 and m percent is 0.
Claim 6
Dependent Claim
9 words
The method of claim 2 wherein X is chlorine.
Claim 7
Dependent Claim
9 words
The method of claim 2 wherein X is bromine.
Claim 8
Dependent Claim
21 words
The method of claim 1 wherein Y' is X, Z is H, m percent is 100 and n percent is 0.
Claim 9
Dependent Claim
9 words
The method of claim 5, wherein X is chlorine.
Claim 10
Dependent Claim
27 words
The method of claim 1, wherein Y is hydrogen, Y' is X, Z is H and n percent and m percent are integers between 0 and 100.
Claim 11
Dependent Claim
9 words
The method of claim 7, wherein X is chlorine.
Claim 12
Dependent Claim
24 words
The method of claim 1, wherein the electron acceptor is present in an amount of from 0.05 to 5 weight percent of the polymer.
Claim 13
Dependent Claim
20 words
The method of claim 1, wherein the radiation is ultraviolet light having a wavelength of from 200 to 350 nm.
Claim 14
Dependent Claim
17 words
The method of claim 1, wherein the exposed composition is heated to a temperature up to 150°C.
Claim 15
Dependent Claim
13 words
The method of claim 11, wherein the temperature is from 80° to 125°C.
Claim 16
Dependent Claim
20 words
The method of claim 1 wherein the electron acceptor is tetracyanoethylene, dichloro dicyano benzoquinone, cyanil, chloranil, bromonil, tetracyanoquinodimethan or 2,4,7-trinitrofluorenone.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |