US5691098A
Expired / Lapsed
US
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Laser-Induced mass transfer imaging materials utilizing diazo compounds
Assignee: 3M Innovative Properties Co
•
Filing: 1996-04-03
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Granted: 1997-11-25
•
Expires: 2016-04-03
Abstract
Abstract The invention relates to a method of increasing the sensitivity of laser induced thermal imaging by using certain diazo compounds. The diazo compounds contain functional groups adjacent the diazo substituent capable of stabilizing these compounds. The invention is useful in the field of thermal transfer imaging for the production of various graphic arts media.
Inventors
- 👤 Stanley C. Busman
- 👤 Gregory D. Cuny
- 👤 Krzysztof A. Zaklika
- 👤 Richard J. Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:57
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/392; B41C; B41C1/00; B41C1/10; B41C1/1091; C; C07; C07C; C07C245/00; C07C245/12; C07C245/14; C07C245/18; G; G03; G03F; G03F3/00; G03F3/10; G03F3/108
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
67 words
A thermal transfer donor element comprising a substrate having coated on at least a portion thereof, in one or more layers: (a) a compound having a diazo substituent and at least one electron withdrawing functional group adjacent the diazo substituent; (b) a nondiazo radiation absorber; and (c) a thermal mass transfer material; wherein the diazo compound has a decomposition temperature of no greater than about 250° C.
Claim 2
Dependent Claim
67 words
A thermal transfer donor element comprising a substrate having coated on at least a portion thereof, in one or more layers: (a) a compound having a diazo substituent and at least one electron withdrawing functional group adjacent the diazo substituent; (b) a nondiazo radiation absorber; and (c) a thermal mass transfer material; wherein the diazo compound has a decomposition temperature of no greater than about 250° C.
Claim 3
Dependent Claim
24 words
The thermal transfer donor element according to claim 1 wherein the diazo compound has a decomposition temperature of no greater than about 200° C.
Claim 4
Dependent Claim
23 words
The thermal transfer donor element according to claim 2 wherein the diazo compound vaporizes at a temperature of less than about 150° C.
Claim 5
Dependent Claim
34 words
The thermal transfer donor element according to claim 1 wherein the diazo compound vaporizes at a temperature of less than about 150° C. and has a decomposition temperature of at least about 110° C.
Claim 6
Dependent Claim
45 words
The thermal transfer donor element according to claim 1 wherein the electron withdrawing functional group is selected from the group consisting of a carbonyl group, an oxycarbonyl group, a sulfonyl group, a nitro group, a cyano group, a perfluoroalkyl group, and a phosphine oxide group.
Claim 7
Dependent Claim
23 words
The thermal transfer donor element according to claim 1 wherein the diazo compound has two electron withdrawing functional groups adjacent the diazo substituent.
Claim 8
Dependent Claim
42 words
The thermal transfer donor element according to claim 1 wherein the substrate is coated with a first layer comprising the diazo compound and the nondiazo radiation absorber and a second layer comprising the thermal mass transfer material coated onto the first layer.
Claim 9
Dependent Claim
43 words
The thermal transfer donor element according to claim 1 comprising a substrate having coated sequentially thereon: (a) a first layer comprising the radiation absorber; (b) a second layer comprising the diazo substituent; and (c) a third layer comprising the thermal mass transfer material.
Claim 10
Dependent Claim
39 words
The thermal transfer donor element according to claim 1 wherein the diazo compound has the formula: ##STR30## wherein each X is independently selected from the group consisting of: ##STR31## wherein each R is independently H or an organic group.
Claim 11
Dependent Claim
21 words
The thermal transfer donor element of claim 9 wherein X is selected from the group consisting of --C(O)R, --C(O)OR, and --CN.
Claim 12
Dependent Claim
20 words
The thermal transfer donor element of claim 10 wherein X is selected from the group consisting of --C(O)R and --C(O)OR.
Claim 13
Dependent Claim
14 words
The thermal transfer donor element of claim 9 wherein the diazo compound is polymeric.
Claim 14
Dependent Claim
24 words
The thermal transfer donor element of claim 9 wherein the diazo compound is monomeric and R is a C 1 -C 30 organic group.
Claim 15
Dependent Claim
53 words
The thermal transfer donor element of claim 13 wherein R is selected from the group consisting of a (C 1 -C 30 )aliphatic group, a (C 7 -C 30 )alkaryl group, a (C 7 -C 30 )aralkyl group, a (C 6 -C 30 )aryl group, and a (C 7 -C 30 )heterocyclic group.
Claim 16
Dependent Claim
51 words
The thermal transfer donor element of claim 14 wherein R is selected from the group consisting of a (C 1 -C 15 )alkyl group, a (C 7 -C 15 )alkaryl group, a (C7-C 15 )aralkyl group, a (C 6 -C 15 )aryl group, and a (C 5 -C 15 )heterocyclic group.
Claim 17
Dependent Claim
28 words
The thermal transfer donor element of claim 15 wherein R is a (C 1 -C 5 )alkyl moiety, two of which can be joined to form a ring.
Claim 18
Dependent Claim
21 words
The thermal transfer donor element according to claim 1 wherein the nondiazo radiation absorber absorbs visible, near infrared, or infrared radiation.
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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) | 2000-11-24 | 2001-05-26 | 2001-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-24 | 2005-05-26 | 2005-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-24 | 2009-05-26 | 2009-11-25 | $7700.00 | Window Closed / Lapsed |