US5571850A
Expired / Lapsed
US
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Aqueous dispersions containing cyclopolymer dispersants
Assignee: Commonwealth Scientific and Industrial Research Organisation
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Filing: 1994-07-29
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Granted: 1996-11-05
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Expires: 2014-07-29
Abstract
Abstract Aqueous dispersions which are particularly well suited for use as aqueous jet ink compositions having an aqueous carrier medium which comprises water or a mixture of water and at least one organic solvent, a particulate solid, preferably a pigment, and a cyclopolymer dispersant.
Inventors
- 👤 Sheau-Hwa Ma
- 👤 San Hoa Thang
- 👤 Ezio Rizzardo
- 👤 Graeme Moad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:39
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; C07D239/60; C07D239/62; C07C; C07C69/00; C07C69/52; C07C69/604; C07C69/612; C07C69/618; C07C69/62; C07C69/65; C07D319/00; C07D319/04; C07D319/06; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4015; C08; C08F; C08F36/00; C08F36/02; C08F36/20; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/324; C09D11/326
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
85 words
A dispersion comprising an aqueous carrier medium, a particulate solid, and a cyclopolymer dispersant consisting essentially of at least one cyclopolymer having the formula: ##STR4## with the proviso that either (i) R 1 and R 2 are hydrophobic groups, and X and Y are hydrophilic groups, or (ii) R 1 and R 2 are hydrophilic groups, and X and Y are hydrophobic groups; and n is selected such that the weight average molecular weight of the cyclopolymer is in the range of 1,000 to 50,000.
Claim 2
Dependent Claim
85 words
A dispersion comprising an aqueous carrier medium, a particulate solid, and a cyclopolymer dispersant consisting essentially of at least one cyclopolymer having the formula: ##STR4## with the proviso that either (i) R 1 and R 2 are hydrophobic groups, and X and Y are hydrophilic groups, or (ii) R 1 and R 2 are hydrophilic groups, and X and Y are hydrophobic groups; and n is selected such that the weight average molecular weight of the cyclopolymer is in the range of 1,000 to 50,000.
Claim 3
Dependent Claim
78 words
The dispersion of claim 1 wherein R 1 and R 2 are hydrophobic groups independently selected from the groups consisting of COOR, CN, C(O)NHR 4 and C(O)NR 5 R 6 wherein R, R 4 , R 5 , and R 6 are independently selected from the group consisting of alkyl, substituted alkyl, aryl, or substituted aryl groups having 1 to 18 carbon atoms, wherein the substituted group is a substituent that does not interfere with the polymerization process.
Claim 4
Dependent Claim
89 words
The dispersion of claim 2 wherein X and Y are hydrophilic groups independently selected from the group consisting of COOH, PO 3 H, SO 3 H, COOR 7 , C(O)NHR 8 , C(O)NR 9 R 10 , and R 11 CO wherein R 7 , R 8 , R 9 , R 10 and R 11 are independently selected from the group consisting of alkyl, aryl, aralkyl or alkylaryl group containing 1 to 30 carbon atoms and sufficient hydrophilic groups to render X and Y as a whole hydrophilic.
Claim 5
Dependent Claim
80 words
The dispersion of claim 1 wherein R 1 and R 2 are hydrophilic groups independently selected from the group consisting of COOH, COOR 7 , C(O)NHR 8 , and C(O)NR 9 R 10 wherein R 7 , R 8 , R 9 and R10 are independently selected from the group consisting of alkyl, aryl, aralkyl or alkylaryl group containing 1 to 30 carbon atoms and sufficient hydrophilic groups to render the R 1 and R 2 as a whole hydrophilic.
Claim 6
Dependent Claim
93 words
The dispersion of claim 4 wherein X and Y are hydrophobic groups independently selected from the group consisting of COOR, CN, R 3 CO, C(O)NHR 4 , and C(O)NR 5 R 6 wherein R, R 4 , R 5 , and R 6 are independently selected from the group consisting of alkyl, substituted alkyl, aryl, or substituted aryl groups having 1 to 18 carbon atoms and R 3 is an alkyl group containing 1 to 6 carbon atoms, wherein the substituted group is a substituent that does not interfere with the polymerization process.
Claim 7
Dependent Claim
12 words
The dispersion of claim 1 wherein said particulate solid is a pigment.
Claim 8
Dependent Claim
20 words
The dispersion of claim 6 wherein said pigment has a particle size in the range of 0,005 to 15 microns.
Claim 9
Dependent Claim
46 words
The dispersion of claim 1 wherein said dispersion is an ink jet ink containing 70 to 96% aqueous carrier medium, up to 30% by weight of an organic pigment, up to 75% by weight of an inorganic pigment, and 0.1 to 30% by weight cyciopolymer dispersant.
Claim 10
Dependent Claim
37 words
The dispersion of claim 1 containing at least one additive 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.
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) | 1999-11-05 | 2000-05-06 | 2000-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-05 | 2004-05-06 | 2004-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-05 | 2008-05-06 | 2008-11-05 | $7700.00 | Window Closed / Lapsed |