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Patent US5854331A successfully refreshed from Google Patents.
US5854331A
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Block copolymers of oxazolines and oxazines as pigment dispersants and their use in ink jet inks
Assignee: EIDP Inc
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Filing: 1997-11-04
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Granted: 1998-12-29
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Expires: 2017-11-04
Abstract
Abstract Aqueous dispersions having improved stability and which are particularly well suited for use as aqueous ink jet ink compositions comprise an aqueous vehicle which comprises water or a mixture of water and an organic solvent; a particulate solid, preferably a pigment; and a polyoxazoline or polyoxazine dispersant selected from the group of AB, ABA, and BAB block copolymers wherein the A block is hydrophobic, and the B block is hydrophilic, and wherein the polymer as a whole has a solubility in the aqueous vehicle of at least 0.1 wt % at 25° C.
Inventors
- 👤 Sheau-Hwa Ma
- 👤 Jose N. Rodriguez-Parada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:15
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/324; C09D11/326; C08; C08F; C08F297/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
88 words
An aqueous dispersion comprising: (a) an aqueous vehicle, (b) a particulate solid, and (c) a block polymer dispersant selected from the group consisting of AB, ABA, and BAB block copolymers wherein the A block is hydrophobic, and the B block is hydrophilic, wherein the polymer as a whole has a solubility in the aqueous vehicle of at least 0.1 wt % at 25° C.; (d) said block polymeric dispersant being comprised of monomers selected from the group consisting of 2-substituted oxazoline monomers, 2-substituted oxazine monomers, and mixtures thereof.
Claim 2
Dependent Claim
88 words
An aqueous dispersion comprising: (a) an aqueous vehicle, (b) a particulate solid, and (c) a block polymer dispersant selected from the group consisting of AB, ABA, and BAB block copolymers wherein the A block is hydrophobic, and the B block is hydrophilic, wherein the polymer as a whole has a solubility in the aqueous vehicle of at least 0.1 wt % at 25° C.; (d) said block polymeric dispersant being comprised of monomers selected from the group consisting of 2-substituted oxazoline monomers, 2-substituted oxazine monomers, and mixtures thereof.
Claim 3
Dependent Claim
137 words
The dispersion of claim 1, wherein the block polymer dispersant comprises a polymer having the following general formula (with the A block represented by formula A and the B block represented by formula B): ##STR3## wherein x is 1-100; y is 5-500; y/x is 5-100; Z is a divalent linking group represented by the formula: R.sub.3 (L).sub.r, wherein R 3 is an alkene, arylene, or aralkylene group containing 2 to 10 carbon atoms, L is O, S, C(O), OC(O), (O)CO, SC(O), or SO 2 group and r=0 or 1; m=2 or 3; p=2 or 3; n=0 or 1; R 1 is an alkyl, aryl, aralky, or alkylaryl group containing 4 to 20 carbon atoms; and R 2 is an alkyl group containing 1 to 3 carbon atoms, and optionally containing one or more hydroxyl or ether groups.
Claim 4
Dependent Claim
16 words
The dispersion of claim 2, wherein x is 1-10, y is 5-100 and y/x is 5-50.
Claim 5
Dependent Claim
39 words
The dispersion of claim 1, further comprising at least one organic component selected from the group consisting of organic solvents, polymeric binders, water-soluble polymers, water-dispersible latex emulsions, thickeners, coalescing agents, surfactants, biocides, sequestering agents, thixotropic agents and coating aids.
Claim 6
Dependent Claim
26 words
The dispersion of claim 1, wherein the particulate solid is selected from the group consisting of pigments, colloidal silver halide, metallic flake, herbicides, insecticides, and biomaterials.
Claim 7
Dependent Claim
20 words
The dispersion of claim 1, wherein said aqueous vehicle is a mixture of water and a water soluble organic solvent.
Claim 8
Dependent Claim
34 words
An ink jet ink composition comprising the dispersion of claim 1, wherein the aqueous vehicle comprises a mixture of water and a water soluble organic solvent and wherein the particulate solid is a pigment.
Claim 9
Dependent Claim
20 words
The ink of claim 7, wherein the block polymer dispersant has a number average molecular weight of 1,000 to 20,000.
Claim 10
Dependent Claim
16 words
The ink of claim 7, wherein the pigment has a size of 0.01 to 5 microns.
Claim 11
Dependent Claim
38 words
The ink of claim 7, having the following formulation, based on total weight of the ink: (a) 70 to 99.8 wt % aqueous vehicle; (b) 0.1 to 30 wt % pigment; and (c) 0.1-10 wt % dispersant polymer.
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) | 2001-12-28 | 2002-06-29 | 2002-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-28 | 2006-06-29 | 2006-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-28 | 2010-06-29 | 2010-12-29 | $7700.00 | Window Closed / Lapsed |