US5652282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid inks using a gel organosol
Assignee: 3M Co
•
Filing: 1995-09-29
•
Granted: 1997-07-29
•
Expires: 2015-09-29
Abstract
Abstract An organosol comprising a high molecular weight (co)polymeric steric stabilizer covalently bonded to an insoluble, high molecular weight thermoplastic (co)polymeric core is described which has the ability to form a three dimensional gel of controlled rigidity. The gel provides improved liquid ink or liquid electrophotographic/electrographic toner compositions by increasing sedimentation stability of the colorant, without compromising print quality or ink transfer performance. The gel is formed by manipulating the solubility parameter difference between the stabilizer and the solvent to achieve optimum performance of the dispersion.
Inventors
- 👤 James A. Baker
- 👤 Jai Venkatesan
- 👤 Wu-Shyong Li
- 👤 Gay L. Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:57
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/13; C; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/106; C09D11/107; C08; C08F; C08F290/00; C08F290/08; C08F290/12; C08F290/126; G03G9/131; G03G9/135
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
125 words
A gel organosol dispersion comprising: (a) an aliphatic hydrocarbon carrier liquid having a Kaufi-Butanol number less than 30; and (b) a (co)polymeric static stabilizer having a weight average molecular weight greater than or equal to 50,000 Daltons and a polydispersity less than 15, said steric stabilizer being covalently bonded to a thermoplastic (co)polymertc core that is insoluble in said carrier liquid, wherein the weight ratio of said (co)polymeric atetic stabilizer to said thermoplastic (co)polymeric core is between 1/1 and 1/15, and said (co)polymeric steric stabilizer comprises polymerizable organic compounds or mixture of polymerizable organic compounds having an absolute Hildebrand solubility parameter difference between said polymerizable organic compounds or said mixture of polymerizable organic compounds and said carrier liquid between 2.5 and 3.0 MPa 1/2 .
Claim 2
Dependent Claim
125 words
A gel organosol dispersion comprising: (a) an aliphatic hydrocarbon carrier liquid having a Kaufi-Butanol number less than 30; and (b) a (co)polymeric static stabilizer having a weight average molecular weight greater than or equal to 50,000 Daltons and a polydispersity less than 15, said steric stabilizer being covalently bonded to a thermoplastic (co)polymertc core that is insoluble in said carrier liquid, wherein the weight ratio of said (co)polymeric atetic stabilizer to said thermoplastic (co)polymeric core is between 1/1 and 1/15, and said (co)polymeric steric stabilizer comprises polymerizable organic compounds or mixture of polymerizable organic compounds having an absolute Hildebrand solubility parameter difference between said polymerizable organic compounds or said mixture of polymerizable organic compounds and said carrier liquid between 2.5 and 3.0 MPa 1/2 .
Claim 3
Dependent Claim
23 words
The gel organosol dispersion of claim 1 wherein said thermoplastic (co)polymeric core has a glass transition temperature between 25° C. and -10° C.
Claim 4
Dependent Claim
13 words
The gel organosol dispersion of claim 1 further comprising at least one colorant.
Claim 5
Dependent Claim
22 words
The gel organosol dispersion of claim 1 wherein said absolute Hildebrand solubility parameter difference is between 2.6 and 3.0 MPa 1/2 .
Claim 6
Dependent Claim
13 words
The gel organosol dispersion of claim 4 further comprising at least one colorant.
Claim 7
Dependent Claim
123 words
A gel organosol dispersion comprising: (a) a carrier liquid having a Kauri-Butanol number less than 30; and (b) a (co)polymeric steric stabilizer having a weight average molecular weight greater than or equal to 50,000 Daltons and a polydispersity less than 15, said atetic stabilizer being covalently bonded to a thermoplastic (co)polymeric core that is insoluble in said carrier liquid, wherein the weight ratio of said (co)polymeric steric stabilizer to said thermoplastic (co)polymeric core is between 1/1 and 1/15, and said (co)polymeric steric stabilizer comprises polymerizable organic compounds or mixture of polymerizable organic compounds having an absolute Hildebrand solubility parameter difference between said polymerizable organic compounds or said mixture of polymerizable organic compounds and said carrier liquid between 2.5 and 3.0 MPa 1/2 .
Claim 8
Dependent Claim
123 words
A gel organosol dispersion comprising: (a) a carrier liquid having a Kauri-Butanol number less than 30; and (b) a (co)polymeric steric stabilizer having a weight average molecular weight greater than or equal to 50,000 Daltons and a polydispersity less than 15, said atetic stabilizer being covalently bonded to a thermoplastic (co)polymeric core that is insoluble in said carrier liquid, wherein the weight ratio of said (co)polymeric steric stabilizer to said thermoplastic (co)polymeric core is between 1/1 and 1/15, and said (co)polymeric steric stabilizer comprises polymerizable organic compounds or mixture of polymerizable organic compounds having an absolute Hildebrand solubility parameter difference between said polymerizable organic compounds or said mixture of polymerizable organic compounds and said carrier liquid between 2.5 and 3.0 MPa 1/2 .
Claim 9
Dependent Claim
26 words
The gel organosol dispersion of claim 6 wherein the weight ratio of said (co)polymeric steric stabilizer to said thermoplastic (co)polymeric core is between 1/2 and 1/10.
Claim 10
Dependent Claim
26 words
The gel organosol dispersion of claim 6 wherein the weight ratio of said (co)polymeric steric stabilizer to said thermoplastic (co)polymeric core is between 1/4 and 1/8.
Claim 11
Dependent Claim
24 words
The gel organosol dispersion of claim 6 wherein said weight average molecular weight of said (co)polymeric steric stabilizer is between 50,000 and 750,000 Daltons.
Claim 12
Dependent Claim
18 words
The gel organosol dispersion of claim 6 wherein said thermoplastic (co)polymeric core comprises methyl methacrylate and ethyl acrylate.
Claim 13
Dependent Claim
24 words
The gel organosol dispersion of claim 10 wherein said thermoplastic (co)polymeric core comprises 25% by weight methyl methacrylate and 75% by weight ethyl acrylate.
Claim 14
Dependent Claim
24 words
The gel organosol dispersion of claim 6 wherein said (co)polymeric steric stabilizer is covalently bonded to said thermoplastic (co)polymeric core using a polyurethane linkage.
Claim 15
Dependent Claim
30 words
The gel organosol dispersion of claim 12 wherein said polyurethane linkage comprises a reaction product of a hydroxyl group incorporated into said steric stabilizer and an ethylenically unsaturated aliphatic isocyanate.
Claim 16
Dependent Claim
16 words
The gel organosol dispersion of claim 13 wherein said ethylenically unsaturated aliphatic isocyanate is meta-isopropenyldimethylbenzyl isocyanate.
Claim 17
Dependent Claim
34 words
The gel organosol dispersion of claim 6 wherein said polymerizable organic compounds or said mixture of polymerizable organic compounds are present in amounts of at least 80% by weight of the graft stabilizer polymer.
Claim 18
Dependent Claim
34 words
The gel organosol dispersion of claim 6 wherein said polymerizable organic compounds or said mixture of polymerizable organic compounds are present in amounts of at least 90% by weight of the graft stabilizer polymer.
Claim 19
Dependent Claim
34 words
The gel organosol dispersion of claim 6 wherein said polymerizable organic compounds or said mixture of polymerizable organic compounds are present in amounts of at least 92% by weight of the graft stabilizer polymer.
Claim 20
Dependent Claim
29 words
The gel organosol dispersion of claim 6 wherein said polymerizable organic compounds are selected from the group consisting of 2-ethylhexyl acrylate, lauryl acrylate, octadecyl acrylate, 2-ethylhexyl(methacrylate), hydroxy(ethylmethacrylate) and octadecyl(methacrylate).
Claim 21
Dependent Claim
121 words
A gel organosol dispersion comprising: (a) a carrier liquid having a Kauri-Butanol number less than 30; and (b) a (co)polymeric steric stabilizer having a weight average molecular weight between 50,000 and 750,000 Daltons and a polydispersity less than 15, said steric stabilizer being covalently bonded to a thermoplastic (co)polymeric core that is insoluble in said carrier liquid, wherein the weight ratio of said (co)polymeric steric stabilizer to said thermoplastic (co)polymeric core is between 1/1 and 1/15, and said (co)polymeric steric stabilizer comprises polymerizable organic compounds or mixture of polymerizable organic compounds having an absolute Hildebrand solubility parameter difference between said polymerizable organic compounds or said mixture of polymerizable organic compounds and said carrier liquid between 2.5 and 3.0 MPa 1/2 .
Claim 22
Dependent Claim
121 words
A gel organosol dispersion comprising: (a) a carrier liquid having a Kauri-Butanol number less than 30; and (b) a (co)polymeric steric stabilizer having a weight average molecular weight between 50,000 and 750,000 Daltons and a polydispersity less than 15, said steric stabilizer being covalently bonded to a thermoplastic (co)polymeric core that is insoluble in said carrier liquid, wherein the weight ratio of said (co)polymeric steric stabilizer to said thermoplastic (co)polymeric core is between 1/1 and 1/15, and said (co)polymeric steric stabilizer comprises polymerizable organic compounds or mixture of polymerizable organic compounds having an absolute Hildebrand solubility parameter difference between said polymerizable organic compounds or said mixture of polymerizable organic compounds and said carrier liquid between 2.5 and 3.0 MPa 1/2 .
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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) | 2000-07-28 | 2001-01-27 | 2001-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-28 | 2005-01-27 | 2005-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-28 | 2009-01-27 | 2009-07-29 | $7700.00 | Window Closed / Lapsed |