EP0355062A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Ink jet inks and liquid developers
Assignee: Xerox Corp
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Filing: 1989-08-15
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Granted: —
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Expires: 2009-08-15
Abstract
Abstract Ink jet inks and liquid developers are disclosed which contain coloured particles comprising hydrophilic silica particles, to the surfaces of which dyes are covalently bonded through silane coupling agents. The ink jet inks generally comprise a liquid medium and a plurality of the coloured silica particles. The liquid developers generally comprise a liquid medium, a resin, a pluraltiy of the coloured silica particles, and a charge-control agent. The particles are prepared by a process which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form particles having covalently attached thereto coupling agents, followed by reacting a dye with the coupling agent attached to the silica particles.
Inventors
- 👤 Francoise Martine Winnik
- 👤 Melvin D. Croucher
- 👤 Barkev Keoshkerian
- 👤 James D. Mayo
- 👤 Raymond W. Wong
- 👤 Peter G. Hofstra
- 👤 Stephan Drappel
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 00:23
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/309; B; B82; B82Y; B82Y30/00; C09C3/00; C09C3/08; C09C3/12; C09D; C09D11/00; C09D11/30; C09D11/54; G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/122; C01; C01P; C01P2004/00; C01P2004/50; C01P2004/60; C01P2004/61; C01P2004/62; C01P2004/64; C01P2006/00; C01P2006/12; C01P2006/60; C01P2006/80; C01P2006/90
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
37 words
An ink jet composition which comprises water; a solvent of glycols, dimethylsulfoxide, or sulfolane; and a plurality of coloured particles comprising hydrophilic silica particles, to the surface of which dyes are covalently bonded through silane coupling agents.
Claim 2
Dependent Claim
37 words
An ink jet composition which comprises water; a solvent of glycols, dimethylsulfoxide, or sulfolane; and a plurality of coloured particles comprising hydrophilic silica particles, to the surface of which dyes are covalently bonded through silane coupling agents.
Claim 3
Dependent Claim
78 words
An ink composition which comprises water; a solvent comprising glycols, dimethylsulfoxide or sulfolane; and a plurality of coloured particles comprising hydrophilic silica particles, to the surface of which dyes are covalently bonded through silane coupling agents; wherein the particles are prepared by a process which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form particles having covalently attached thereto coupling agents, followed by reacting a dye with the coupling agent.
Claim 4
Dependent Claim
78 words
An ink composition which comprises water; a solvent comprising glycols, dimethylsulfoxide or sulfolane; and a plurality of coloured particles comprising hydrophilic silica particles, to the surface of which dyes are covalently bonded through silane coupling agents; wherein the particles are prepared by a process which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form particles having covalently attached thereto coupling agents, followed by reacting a dye with the coupling agent.
Claim 5
Dependent Claim
82 words
A process for preparing an ink jet composition which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form silica particles having covalently attached thereto coupling agents, subsequently reacting a dye with the coupling agent to form coloured silica particles to the surface of which the dye is covalently bonded through the silane coupling agent, dispersing the coloured silica particles in water, and adding to the dispersion a solvent comprising glycols, dimethyl sulfoxide or sulfolane.
Claim 6
Dependent Claim
82 words
A process for preparing an ink jet composition which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form silica particles having covalently attached thereto coupling agents, subsequently reacting a dye with the coupling agent to form coloured silica particles to the surface of which the dye is covalently bonded through the silane coupling agent, dispersing the coloured silica particles in water, and adding to the dispersion a solvent comprising glycols, dimethyl sulfoxide or sulfolane.
Claim 7
Dependent Claim
36 words
An ink jet comprising a liquid vehicle, a thickening agent, an optional conductivity-enhancing agent, and a plurality of particles comprising hydrophilic silica particles, wherein dyes are covalently bonded to the particles' surfaces through silane coupling agents.
Claim 8
Dependent Claim
36 words
An ink jet comprising a liquid vehicle, a thickening agent, an optional conductivity-enhancing agent, and a plurality of particles comprising hydrophilic silica particles, wherein dyes are covalently bonded to the particles' surfaces through silane coupling agents.
Claim 9
Dependent Claim
76 words
An ink composition composition comprising a liquid vehicle, a thickening agent, and a plurality of coloured particles comprising hydrophilic silica particles, to the surface of which dyes are covalently bonded through silane coupling agents, wherein the particles are prepared by a process which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form particles having covalently attached thereto coupling agents, followed by reacting a dye with the coupling agent.
Claim 10
Dependent Claim
76 words
An ink composition composition comprising a liquid vehicle, a thickening agent, and a plurality of coloured particles comprising hydrophilic silica particles, to the surface of which dyes are covalently bonded through silane coupling agents, wherein the particles are prepared by a process which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form particles having covalently attached thereto coupling agents, followed by reacting a dye with the coupling agent.
Claim 11
Dependent Claim
82 words
A process for preparing an ink composition, which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form silica particles having covalently attached thereto coupling agents, subsequently reacting a dye with the coupling agent to form coloured silica particles to the surface of which the dye is covalently bonded through the silane coupling agent, recovering and drying the coloured silica particles, and admixing the coloured silica particles with a liquid vehicle and a thickening agent.
Claim 12
Dependent Claim
82 words
A process for preparing an ink composition, which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form silica particles having covalently attached thereto coupling agents, subsequently reacting a dye with the coupling agent to form coloured silica particles to the surface of which the dye is covalently bonded through the silane coupling agent, recovering and drying the coloured silica particles, and admixing the coloured silica particles with a liquid vehicle and a thickening agent.
Claim 13
Dependent Claim
43 words
A liquid developer composition which comprises a liquid medium, a polymeric material soluble in the liquid medium, a charge-control agent, and a plurality of coloured particles comprising hydrophilic silica particles, to the surfaces of which dyes are covalently bonded through silane coupling agents.
Claim 14
Dependent Claim
43 words
A liquid developer composition which comprises a liquid medium, a polymeric material soluble in the liquid medium, a charge-control agent, and a plurality of coloured particles comprising hydrophilic silica particles, to the surfaces of which dyes are covalently bonded through silane coupling agents.
Claim 15
Dependent Claim
85 words
A liquid developer composition which comprises a liquid medium, a polymeric material soluble in the liquid medium, a charge-control agent, and a plurality of coloured particles comprising hydrophilic silica particles, to the surface of which dyes are covalently bonded through silane coupling agents, wherein the particles are prepared by a process which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form particles having covalently attached thereto coupling agents, followed by reacting a dye with the coupling agent.
Claim 16
Dependent Claim
85 words
A liquid developer composition which comprises a liquid medium, a polymeric material soluble in the liquid medium, a charge-control agent, and a plurality of coloured particles comprising hydrophilic silica particles, to the surface of which dyes are covalently bonded through silane coupling agents, wherein the particles are prepared by a process which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form particles having covalently attached thereto coupling agents, followed by reacting a dye with the coupling agent.
Claim 17
Dependent Claim
94 words
A process for preparing a liquid developer, which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form silica particles having covalently attached thereto coupling agents, subsequently reacting a dye with the coupling agent to form coloured silica particles to the surface of which the dye is covalently bonded through the silane coupling agent, recovering and drying the coloured silica particles, admixing the coloured silica particles with a liquid medium and a polymeric material soluble in the liquid medium, and adding to the mixture a charge-control agent.
Claim 18
Dependent Claim
94 words
A process for preparing a liquid developer, which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form silica particles having covalently attached thereto coupling agents, subsequently reacting a dye with the coupling agent to form coloured silica particles to the surface of which the dye is covalently bonded through the silane coupling agent, recovering and drying the coloured silica particles, admixing the coloured silica particles with a liquid medium and a polymeric material soluble in the liquid medium, and adding to the mixture a charge-control agent.
Claim 19
Dependent Claim
41 words
A liquid developer composition, which comprises a liquid medium, a charge-control agent, and a plurality of toner particles comprising a resin and coloured hydrophilic silica particles, to the surfaces of which silica particles dyes are covalently bonded through silane coupling agents.
Claim 20
Dependent Claim
41 words
A liquid developer composition, which comprises a liquid medium, a charge-control agent, and a plurality of toner particles comprising a resin and coloured hydrophilic silica particles, to the surfaces of which silica particles dyes are covalently bonded through silane coupling agents.
Claim 21
Dependent Claim
79 words
A liquid developer composition, which comprises a liquid medium, a resin, a charge-control agent, and a plurality of coloured particles comprising hydrophilic silica particles, to the surface of which dyes are covalently bonded through silane coupling agents, wherein the particles are prepared by a process which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form particles having covalently attached thereto coupling agents, followed by reacting a dye with the coupling agent.
Claim 22
Dependent Claim
79 words
A liquid developer composition, which comprises a liquid medium, a resin, a charge-control agent, and a plurality of coloured particles comprising hydrophilic silica particles, to the surface of which dyes are covalently bonded through silane coupling agents, wherein the particles are prepared by a process which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form particles having covalently attached thereto coupling agents, followed by reacting a dye with the coupling agent.
Claim 23
Dependent Claim
94 words
A process for preparing a liquid developer, which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form silica particles having covalently attached thereto coupling agents, subsequently reacting a dye with the coupling agent to form coloured silica particles to the surface of which the dye is covalently bonded through the silane coupling agent, recovering and drying the coloured silica particles, admixing a liquid medium and a resin, admixing the coloured silica particles with the liquid medium and resin, and adding to the mixture a charge-control agent.
Claim 24
Dependent Claim
94 words
A process for preparing a liquid developer, which comprises reacting hydrophilic silica particles with a silane coupling agent in the absence of water to form silica particles having covalently attached thereto coupling agents, subsequently reacting a dye with the coupling agent to form coloured silica particles to the surface of which the dye is covalently bonded through the silane coupling agent, recovering and drying the coloured silica particles, admixing a liquid medium and a resin, admixing the coloured silica particles with the liquid medium and resin, and adding to the mixture a charge-control agent.
References Cited (Backward Citations)
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