Patent US6966944B2 successfully refreshed from Google Patents.
US6966944B2
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Anticurling agent, ink jet ink, method for ink jet recording and method for reducing curling
Assignee: Canon Inc
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Filing: 2004-06-24
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Granted: 2005-11-22
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Expires: 2024-06-24
Abstract
Abstract The present invention provides an anti-curl agent containing an amide compound of specific structure and molecular weight, an ink jet ink containing the amide compound, a method for ink jet recording to form images by ejecting the ink, and a method for reducing curl of recording media using the ink. The anti-curl agent of the present invention can reduce shape changes of a printed paper with a lapse of time, i.e., the curl phenomenon, tending to occur in particular with a plain paper printed over the entire surface, without deteriorating image quality.
Inventors
- 👤 Masako Shimomura
- 👤 Hiromichi Noguchi
- 👤 Kenji Shinjo
- 👤 Yutaka Kurabayashi
- 👤 Hirofumi Ichinose
- 👤 Minako Kawabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:32
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/38; B; B41; B41J; B41J11/00; B41J11/0005; B41J11/0015; C09D11/54; D; D21; D21H; D21H27/00; D21H27/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
217 words
An ink jet ink comprising: a colorant; an aqueous medium; and an amide compound which has a structure selected from the group consisting of the general formulae (a) and (b) described below, and a molecular weight below 1000: wherein, n is 1; R 0 is a linear or branched alkanol group of 2 to 4 carbon atoms, —(CH 2 ) m1 COOH where m1 is 2 or 3, —(CH 2 ) m2 SO 3 Na where m2 is 2 or 3 or —(CH 2 ) m3 SO 3 H where m3 is 2 or 3; and R 1 and R 2 are each independently a hydrogen atom or a linear or branched alkanol group of 2 to 4 carbon atoms, substituted with a hydrogen atom or hydroxyl group, where R 1 and R 2 are not a hydrogen atom simultaneously, and wherein, R 0 is phenylene, ethylene, propylene, butylene or cyclohexylene group; and R 1 to R 4 are each independently a hydrogen atom, a linear or branched alkanol group of 2 to 4 carbon atoms or —(CH 2 CH 2 O) n H where n is an integer of 1 to 5, where R 1 and R 2 are not a hydrogen atom simultaneously, and R 3 and R 4 are not a hydrogen atom simultaneously.
Claim 2
Dependent Claim
217 words
An ink jet ink comprising: a colorant; an aqueous medium; and an amide compound which has a structure selected from the group consisting of the general formulae (a) and (b) described below, and a molecular weight below 1000: wherein, n is 1; R 0 is a linear or branched alkanol group of 2 to 4 carbon atoms, —(CH 2 ) m1 COOH where m1 is 2 or 3, —(CH 2 ) m2 SO 3 Na where m2 is 2 or 3 or —(CH 2 ) m3 SO 3 H where m3 is 2 or 3; and R 1 and R 2 are each independently a hydrogen atom or a linear or branched alkanol group of 2 to 4 carbon atoms, substituted with a hydrogen atom or hydroxyl group, where R 1 and R 2 are not a hydrogen atom simultaneously, and wherein, R 0 is phenylene, ethylene, propylene, butylene or cyclohexylene group; and R 1 to R 4 are each independently a hydrogen atom, a linear or branched alkanol group of 2 to 4 carbon atoms or —(CH 2 CH 2 O) n H where n is an integer of 1 to 5, where R 1 and R 2 are not a hydrogen atom simultaneously, and R 3 and R 4 are not a hydrogen atom simultaneously.
Claim 3
Dependent Claim
18 words
The ink according to claim 1 , wherein said amide compound is represented by the general formula (a).
Claim 4
Dependent Claim
18 words
The ink according to claim 1 , wherein said amide compound is represented by the general formula (b).
Claim 5
Dependent Claim
24 words
A method for ink jet recording, comprising at least a step of ejecting an ink according to claim 1 by an ink jet method.
Claim 6
Dependent Claim
30 words
A method for reducing curl of a recording medium by applying an ink according to claim 1 to a recording medium by ejecting the ink by an ink jet method.
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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) | 2008-11-21 | 2009-05-23 | 2009-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-11-21 | 2013-05-23 | 2013-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-11-21 | 2017-05-23 | 2017-11-22 | $7700.00 | Window Closed / Lapsed |