Patent US3717848A successfully refreshed from Google Patents.
US5877235A
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Aqueous ink
Assignee: Kao Corp
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Filing: 1996-10-25
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Granted: 1999-03-02
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Expires: 2016-10-25
Abstract
Abstract The aqueous ink of the present invention comprises a suspension of a polymer, preferably a polyester or a polyester polyamide, having adsorbed a dye or a pigment, wherein the surface tension (γ) and the viscosity (η) of the ink at 20° C. and the average particle size (d) of the suspended particles satisfy the following inequality (1): 0.1≦γ·η·d≦11 (1) wherein the units of the parameters γ, η and d are dyne/cm, cps, and μm, respectively.
Inventors
- 👤 Tadashi Sakuma
- 👤 Tetsuya Ueno
- 👤 Kuniyasu Kawabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:48
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/16
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
190 words
An aqueous ink comprising a suspension of particles of a polymer having an adsorbed dye or a pigment, wherein the surface tension (γ) and the viscosity (η) of said ink at 20° C. and the average particle size (d) of the suspended particles satisfy the following inequity (1): 0.1≦γ·η·d≦11 (1) wherein the units of the parameters γ, η and d are dyne/cm, cps, and μm, respectively, said polymer being at lest one member selected from the from the group consisting of a polyester and a polyester polyamide having an acid value of 3 to 100 KOHmg/g as measured according to JIS K 0070 and a glass transition point of not lower than 20° C. wherein said polymer contains in its polymer chain a unit which is an ester of a diol component represented by formula (2): ##STR10## wherein R represents a lower alkyl group having 1 to 4 carbon atoms; A represents an alkylene group having 2 to 4 carbon atoms; and x and y, which may be the same or different, each represent an integer of 1 or greater, the sum of x and y averaging 2 to 7.
Claim 2
Dependent Claim
190 words
An aqueous ink comprising a suspension of particles of a polymer having an adsorbed dye or a pigment, wherein the surface tension (γ) and the viscosity (η) of said ink at 20° C. and the average particle size (d) of the suspended particles satisfy the following inequity (1): 0.1≦γ·η·d≦11 (1) wherein the units of the parameters γ, η and d are dyne/cm, cps, and μm, respectively, said polymer being at lest one member selected from the from the group consisting of a polyester and a polyester polyamide having an acid value of 3 to 100 KOHmg/g as measured according to JIS K 0070 and a glass transition point of not lower than 20° C. wherein said polymer contains in its polymer chain a unit which is an ester of a diol component represented by formula (2): ##STR10## wherein R represents a lower alkyl group having 1 to 4 carbon atoms; A represents an alkylene group having 2 to 4 carbon atoms; and x and y, which may be the same or different, each represent an integer of 1 or greater, the sum of x and y averaging 2 to 7.
Claim 3
Dependent Claim
54 words
The aqueous ink according to claim 1, wherein said polymer is a polyester obtained by co-polycondensating the diol component represented by formula (2) and at least one acid component selected from the group consisting of a polycarboxylic acid having two or more carboxyl groups, an acid anhydride thereof, and a lower alkyl ester thereof.
Claim 4
Dependent Claim
62 words
The aqueous ink according to claim 1, wherein said polymer is a polyester obtained by co-polycondensating the diol component represented by formula (2), a dimeric acid, and at least one acid component selected from the group consisting of a polycarboxylic acid having two or more carboxyl groups other than said dimeric acid, an acid anhydride thereof, and a lower alkyl ester thereof.
Claim 5
Dependent Claim
58 words
The aqueous ink according to claim 1, wherein said polymer is a polyester polyamide obtained by co-polycondensing the diol component represented by formula (2), at least one acid component selected from the group consisting of a polycarboxylic acid having two or more carboxyl groups, an acid anhydride thereof, and a lower alkyl ester thereof, and an amine derivative.
Claim 6
Dependent Claim
64 words
The aqueous ink according to claim 1, wherein said ink further contains an anionic dispersant represented by formula (3) ##STR11## wherein R' represents a hydrogen atom, a hydrocarbon group having 1 to 10 carbon atoms or a hydroxyl group; R" represents a hydrocarbon group having 1 to 5 carbon atoms; M represents a monovalent cation; and l represents an integer of 1 to 1000.
Claim 7
Dependent Claim
15 words
The aqueous ink according to claim 5, wherein said anionic dispersant is a polymeric dispersant.
Claim 8
Dependent Claim
12 words
An ink-jet-recording aqueous ink comprising the aqueous ink according to claim 1.
Claim 9
Dependent Claim
56 words
A process for producing the aqueous ink according to claim 1 comprising the steps of: adding the polymer to a solvent together with the dye or pigment; adding a neutralizing agent to ionize the carboxyl groups of the polymers; adding water to the system; and evaporating the solvent to induce phase inversion into an aqueous system.
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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) | 2002-03-01 | 2002-08-31 | 2003-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-01 | 2006-08-31 | 2007-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-01 | 2010-08-31 | 2011-03-02 | $7700.00 | Window Closed / Lapsed |