US5328794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorine-containing graft copolymer and toner using the same
Assignee: Imperial College London
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Filing: 1993-03-16
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Granted: 1994-07-12
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Expires: 2013-03-16
Abstract
Abstract A fluorine-containing graft copolymer prepared by a step (i) of polymerizing a monomer having formula (I) and an unsaturated carboxylic acid or a monomer having a glycidyl group to obtain a copolymer,group; and A represents -COOCnH2n+1 or OCnH2n+1, in which n is an integer of 6 to 20; a step (ii) of esterifying the resulting copolymer by using a monomer having a glycidyl group in the case where a constituting monomer of the above copolymer is an unsaturated carboxylic acid, or by using an unsaturated carboxylic acid in the case where a constituting monomer of the above copolymer is a monomer having a glycidyl group; and a step (iii) of graft-polymerizing a monomer comprising at least fluoroalkyl acrylate or fluoroalkyl methacrylate on the above esterified copolymer. In addition, a toner comprising a coloring agent and a resin component which comprises the above-mentioned fluorine-containing graft copolymer is disclosed.
Inventors
- 👤 Tsubuko Kazuo
- 👤 Shinichi Kuramoto
- 👤 Kazuhiko Umemura
- 👤 Toshihiko Takahashi
- 👤 Hidemi Uematsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:05
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08784; G03G9/08791; C; C08; C08F; C08F291/00; G03G9/08702; G03G9/08726; G03G9/08728; G03G9/08786
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
163 words
A dry-type toner comprising a coloring agent, and a resin component which comprises a fluorine-containing graft copolymer prepared by a step (i) of polymerizing a monomer having formula (I) and an unsaturated carboxylic acid or an acrylic monomer having a glycidyl group to obtain a copolymer, ##STR15## wherein R represents --H or --CH 3 group; and A represents --COOC n H 2n+1 or OC n H 2n+1 , in which n is an integer of 6 to 20; a step (ii) of esterifying the resulting copolymer by using a monomer having a glycidyl group in the case where a constituting monomer of said copolymer is an unsaturated carboxylic acid, or by using an unsaturated carboxylic acid in the case where a constituting monomer of said copolymer is an acrylic monomer having a glycidyl group; and a step (iii) of graft-polymerizing a monomer selected from the group consisting of a monomer having fluoroalkyl acrylate and a monomer having fluoroalkyl methacrylate on said esterified copolymer.
Claim 2
Dependent Claim
163 words
A dry-type toner comprising a coloring agent, and a resin component which comprises a fluorine-containing graft copolymer prepared by a step (i) of polymerizing a monomer having formula (I) and an unsaturated carboxylic acid or an acrylic monomer having a glycidyl group to obtain a copolymer, ##STR15## wherein R represents --H or --CH 3 group; and A represents --COOC n H 2n+1 or OC n H 2n+1 , in which n is an integer of 6 to 20; a step (ii) of esterifying the resulting copolymer by using a monomer having a glycidyl group in the case where a constituting monomer of said copolymer is an unsaturated carboxylic acid, or by using an unsaturated carboxylic acid in the case where a constituting monomer of said copolymer is an acrylic monomer having a glycidyl group; and a step (iii) of graft-polymerizing a monomer selected from the group consisting of a monomer having fluoroalkyl acrylate and a monomer having fluoroalkyl methacrylate on said esterified copolymer.
Claim 3
Dependent Claim
31 words
The toner as claimed in claim 1, wherein the amount of said coloring agent is in the range of 3 to 50 wt.% of the total amount of said dry-type toner.
Claim 4
Dependent Claim
15 words
The toner as claimed in claim 1, further comprising finely-divided particles of a magnetic material.
Claim 5
Dependent Claim
31 words
The toner as claimed in claim 3, wherein the amount of said magnetic material is in the range of 3.0 to 60 wt.% of the total amount of said dry-type toner.
Claim 6
Dependent Claim
27 words
The toner as claimed in claim 3, wherein the amount of said coloring agent is 10 wt.% or less of the total amount of said dry-type toner.
Claim 7
Dependent Claim
174 words
A wet-type developer comprising (a) a toner component which comprises a coloring agent and a resin component which comprises a fluorine-containing graft copolymer prepared by a step (i) of polymerizing a monomer having formula (I) and an unsaturated carboxylic acid or an acrylic monomer having a glycidyl group to obtain a copolymer, ##STR16## wherein R represents --H or --CH 3 group; and A represents --COOC n H 2n+1 or OC n H 2n+1 , in which n is an integer of 6 to 20; a step (ii) of esterifying the resulting copolymer by using a monomer having a glycidyl group in the case where a constituting monomer of said copolymer is an unsaturated carboxylic acid, or by using an unsaturated carboxylic acid in the case where a constituting monomer of said copolymer is an acrylic monomer having a glycidyl group; and a step (iii) of graft-polymerizing a monomer selected from the group consisting of a monomer having fluoroalkyl acrylate and a monomer having fluoroalkyl methacrylate on said esterified copolymer; and (b) a carrier liquid.
Claim 8
Dependent Claim
174 words
A wet-type developer comprising (a) a toner component which comprises a coloring agent and a resin component which comprises a fluorine-containing graft copolymer prepared by a step (i) of polymerizing a monomer having formula (I) and an unsaturated carboxylic acid or an acrylic monomer having a glycidyl group to obtain a copolymer, ##STR16## wherein R represents --H or --CH 3 group; and A represents --COOC n H 2n+1 or OC n H 2n+1 , in which n is an integer of 6 to 20; a step (ii) of esterifying the resulting copolymer by using a monomer having a glycidyl group in the case where a constituting monomer of said copolymer is an unsaturated carboxylic acid, or by using an unsaturated carboxylic acid in the case where a constituting monomer of said copolymer is an acrylic monomer having a glycidyl group; and a step (iii) of graft-polymerizing a monomer selected from the group consisting of a monomer having fluoroalkyl acrylate and a monomer having fluoroalkyl methacrylate on said esterified copolymer; and (b) a carrier liquid.
Claim 9
Dependent Claim
19 words
The wet-type developer as claimed in claim 6, wherein said coloring agent is coated by said fluorine-containing graft copolymer.
References Cited (Backward Citations)
US4087393A
Cited
JPS5456671A
Cited
JPS60184513A
Cited
JPS6123616A
Cited
JPS61283607A
Cited
JPH0260911A
Cited
US5061587A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-07-11 | 1998-01-10 | 1998-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-11 | 2002-01-10 | 2002-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-11 | 2006-01-10 | 2006-07-12 | $7700.00 | Window Closed / Lapsed |