US6235829B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modification of chargeable pigment particles
Assignee: Videojet Technologies Inc
•
Filing: 1998-07-24
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Granted: 2001-05-22
•
Expires: 2018-07-24
Abstract
Abstract The present invention provides a method for making a non-polar suspension of chargeable pigment particles. A suspension of pigment particles is formed in a non-polar solvent, wherein the pigment particles are inherently ionic or are chargeable, and possess surface anchoring groups on the surface of the pigment particles. The pigment particles are contacted with a polymeric resin comprising a hydrophobic region that is soluble or solvatable in the non-polar solvent and a reactive group that reacts with the surface-anchoring groups on the surface of the pigment particle. The resultant coated pigment particles are stable in non-polar suspensions. In certain embodiments of the present invention, a covalent bond is formed between the pigment and the surface modifying polymer.
Inventors
- 👤 Wing Sum Vincent Kwan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:48
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C3/00; C09C3/10; C01; C01P; C01P2004/00; C01P2004/60; C01P2006/00; C01P2006/10; C01P2006/12; C01P2006/90
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
42 words
A method of hydrophobically modifying chargeable pigment particles having a first functional group, said method comprising contacting in a non-polar solvent said pigment particles with a polymer selected from the group consisting of poly(ethylene-co-maleic anhydride), poly(styrene-co-maleic anhydride), poly(cycloalkylethylene-co-maleic anhydride), and poly(maleic anhydride-co-acrylate).
Claim 2
Independent Claim
42 words
A method of hydrophobically modifying chargeable pigment particles having a first functional group, said method comprising contacting in a non-polar solvent said pigment particles with a polymer selected from the group consisting of poly(ethylene-co-maleic anhydride), poly(styrene-co-maleic anhydride), poly(cycloalkylethylene-co-maleic anhydride), and poly(maleic anhydride-co-acrylate).
Claim 3
Dependent Claim
14 words
The method of claim 1 , wherein said contacting is carried out with milling.
Claim 4
Dependent Claim
12 words
The method of claim 1 , wherein said polymer is poly(ethylene-graft-maleic anhydride).
Claim 5
Dependent Claim
14 words
The method of claim 1 , wherein the pigment particles comprise oxidized carbon black.
Claim 6
Dependent Claim
13 words
Hydrophobically modified chargeable pigment particles prepared by the method of claim 1 .
Claim 7
Dependent Claim
18 words
A non-polar suspension comprising the hydrophobically modified chargeable pigment particles prepared by the method of claim 1 .
Claim 8
Independent Claim
63 words
A method for making a non-polar suspension of chargeable pigment particles comprising: (1) forming a suspension of pigment particles in a non-polar solvent, wherein the pigment particles are inherently ionic or chargeable and possess anchoring groups on the surface of the pigment particles; and (2) contacting the suspension of pigment particles with a polymeric resin comprising a hydrophobic region and polymerized maleic anhydride.
Claim 9
Independent Claim
63 words
A method for making a non-polar suspension of chargeable pigment particles comprising: (1) forming a suspension of pigment particles in a non-polar solvent, wherein the pigment particles are inherently ionic or chargeable and possess anchoring groups on the surface of the pigment particles; and (2) contacting the suspension of pigment particles with a polymeric resin comprising a hydrophobic region and polymerized maleic anhydride.
Claim 10
Dependent Claim
14 words
The method of claim 7 , wherein the pigment particles comprise oxidized carbon black.
Claim 11
Dependent Claim
35 words
The method of claim 8 , wherein said polymeric resin is a block or graft copolymer of maleic anhydride and a hydrophobic monomer selected from the group consisting of ethylene, methyl acrylate, cycloalkylethylene, and styrene.
Claim 12
Dependent Claim
67 words
A non-polar suspension of inherently ionic or chargeable pigment particles having anchoring groups on the surface of said particles comprising said pigment particles suspended in a non-polar solvent, wherein said pigment particles have on their surface a polymeric resin that comprises a hydrophobic region and polymerized maleic anhydride wherein the polymerized maleic anhydride is covalently bonded to the pigment particle surface through reaction with the anchoring groups.
Claim 13
Dependent Claim
67 words
A non-polar suspension of inherently ionic or chargeable pigment particles having anchoring groups on the surface of said particles comprising said pigment particles suspended in a non-polar solvent, wherein said pigment particles have on their surface a polymeric resin that comprises a hydrophobic region and polymerized maleic anhydride wherein the polymerized maleic anhydride is covalently bonded to the pigment particle surface through reaction with the anchoring groups.
Claim 14
Dependent Claim
15 words
The non-polar suspension of claim 10 , wherein the pigment particles comprise oxidized carbon black.
Claim 15
Dependent Claim
36 words
The non-polar suspension of claim 11 , wherein said polymeric resin is a block or graft copolymer of maleic anhydride and a hydrophobic monomer selected from the group consisting of ethylene, methyl acrylate, cycloalkylethylene, and styrene.
Claim 16
Independent Claim
53 words
A method of hydrophobically modifying inherently ionic pigment particles having a first functional group, the method comprising contacting said inherently ionic pigment particles with a polymer having a hydrophobic region and polymerized maleic anhydride so as to form a covalent bond by reaction between the first functional group and the polymerized maleic anhydride.
Claim 17
Independent Claim
53 words
A method of hydrophobically modifying inherently ionic pigment particles having a first functional group, the method comprising contacting said inherently ionic pigment particles with a polymer having a hydrophobic region and polymerized maleic anhydride so as to form a covalent bond by reaction between the first functional group and the polymerized maleic anhydride.
Claim 18
Dependent Claim
27 words
The non-polar suspension of claim 11 , wherein the polymeric resin is selected from the group consisting of poly(ethylene-co-maleic anhydride), poly(styrene-co-maleic anhydride), poly(cycloalkylethylene-co-maleic anhydride), and poly(maleic anhydride-co-acrylate).
Claim 19
Dependent Claim
29 words
The non-polar suspension of claim 11 , wherein the polymeric resin is selected from the group consisting of polymaleic anhydride-block-polyethylene, polystyrene-block-polymaleic anhydride, polyethylene-graft-polymaleic anhydride, polycycloalkylethylene-graft-polymaleic anhydride, and polymaleic anhydride-graft-polyacrylate.
Claim 20
Dependent Claim
14 words
The non-polar suspension of claim 11 , wherein the polymeric resin is poly(ethylene-co-maleic anhydride).
Claim 21
Dependent Claim
14 words
The non-polar suspension of claim 11 , wherein the polymeric resin is poly(styrene-co-maleic anhydride).
Claim 22
Dependent Claim
14 words
The non-polar suspension of claim 11 , wherein the polymeric resin is poly(cycloalkylethylene-co-maleic anhydride).
Claim 23
Dependent Claim
14 words
The non-polar suspension of claim 11 , wherein the polymeric resin is poly(maleic anhydride-co-acrylate).
Claim 24
Dependent Claim
14 words
The non-polar suspension of claim 11 , wherein the polymeric resin is polystyrene-block-polymaleic anhydride.
Claim 25
Dependent Claim
14 words
The non-polar suspension of claim 11 , wherein the polymeric resin is polymaleic anhydride-block-polyethylene.
Claim 26
Dependent Claim
25 words
The method of claim 13 , wherein the polymer is selected from the group consisting of poly(ethylene-co-maleic anhydride), poly(styrene-co-maleic anhydride), poly(cycloalkylethylene-co-maleic anhydride), and poly(maleic anhydride-co-acrylate).
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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) | 2004-05-21 | 2004-11-20 | 2005-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-05-21 | 2008-11-20 | 2009-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-05-21 | 2012-11-20 | 2013-05-22 | $7700.00 | Window Closed / Lapsed |