US4575478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toner for use in electrophotography
Assignee: Toray Industries Inc
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Filing: 1984-05-17
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Granted: 1986-03-11
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Expires: 2004-05-17
Abstract
Abstract Provided is a toner for use in electrophotography comprising (A) an epoxy resin or a modified epoxy resin obtained by the reaction of an epoxy resin with a polyfunctional compound having at least two carboxyl or amino groups per molecule, and (B) a bivalent or polyvalent metal complex compound or a bivalent or polyvalent metal salt.
Inventors
- 👤 Junichi Ohno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:27
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/097; G03G9/09783; C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/681; C08G59/70; G03G9/087; G03G9/08742; G03G9/08753
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
55 words
A toner for use in electrophotography, which comprises: (A) an epoxy resin or a modified epoxy resin obtained by the reaction of an epoxy resin with a polyfunctional compound having at least two carboxyl or amino groups per molecule, and (B) a bivalent or polyvalent metal complex compound or a bivalent or polyvalent metal salt.
Claim 2
Dependent Claim
55 words
A toner for use in electrophotography, which comprises: (A) an epoxy resin or a modified epoxy resin obtained by the reaction of an epoxy resin with a polyfunctional compound having at least two carboxyl or amino groups per molecule, and (B) a bivalent or polyvalent metal complex compound or a bivalent or polyvalent metal salt.
Claim 3
Dependent Claim
45 words
A toner as set forth in claim 1, wherein the epoxy resin is a bisphenol A type epoxy resin of the formula: ##STR11## wherein n is 0 to 12, or a novolak type epoxy resin of the formula: ##STR12## wherein m is 0 to 8.
Claim 4
Dependent Claim
30 words
A toner as set forth in claim 1, wherein the polyfunctional compound having at least two carboxyl groups per molecule is a polycarboxylic acid having 2 to 60 carbon atoms.
Claim 5
Dependent Claim
33 words
A toner as set forth in claim 1, wherein the polyfunctional compound having at least two carboxyl groups per molecule is a reaction product between a polycarboxylic acid anhydride and a polyhydric alcohol.
Claim 6
Dependent Claim
57 words
A toner as set forth in claim 1, wherein the polyfunctional compound having at least two carboxyl groups per molecule is at least one compound selected from the group consisting of maleic acid, fumaric acid, tetrahydrophthalic acid, malonic acid, chlorendic acid and a reaction product between maleic anhydride and 1,4-butanediol, N-(n-butyl)diethanolamine or 1:1 type lauric acid diethanolamide.
Claim 7
Dependent Claim
30 words
A toner as set forth in claim 1, wherein the polyfunctional compound having at least two amino groups per mole cule is a polyamine having 2 to 16 carbon atoms.
Claim 8
Dependent Claim
37 words
A toner as set forth claim 1, wherein the polyfunctional compound having at least two amino groups per molecule is at least one compound selected from the group consisting of triethylenetetramine, m-phenylenediamine, 4,4'-diaminodiphenyl ether, piperazine and N-(2-aminoethyl)piperazine.
Claim 9
Dependent Claim
16 words
A toner as set forth in claim 1, wherein the polyamine is a cyclic secondary amine.
Claim 10
Dependent Claim
28 words
A toner as set forth in claim 1, wherein the modification ratio (the molar ratio of the polyfunctional compound to the epoxy resin) is from 1.1 to 2.0.
Claim 11
Dependent Claim
18 words
A toner as set forth in claim 1, wherein the metal complex compound is an acetylacetonato metal chelate.
Claim 12
Dependent Claim
26 words
A toner as set forth in claim 1, wherein the metal salt is a metal salt of a polycarboxylic acid having 1 to 12 carbon atoms.
Claim 13
Dependent Claim
36 words
A toner as set forth in claim 1, wherein the metal is selected from the group consisting of calcium, barium, magnesium, zinc, copper, aluminum, tin, cobalt, iron, chromium, manganese, molybdenum, nickel, titanium, zirconium, lead and vanadium.
Claim 14
Dependent Claim
22 words
A toner as set forth in claim 1, wherein the ratio of component A to component B is 100: 0.5˜15 by weight.
Claim 15
Dependent Claim
32 words
A toner as set forth in claim 1, wherein at least one additive selected from the group consisting of silane coupling agent, colorant and charge controlling agent is added to the toner.
Claim 16
Dependent Claim
39 words
A toner as set forth in claim 1, wherein the silane coupling agent is used in a quantity of 0.2 to 8 parts by weight per 100 parts by weight of the epoxy resin or the modified epoxy resin.
Claim 17
Dependent Claim
78 words
A process for preparing a toner for use in electrostatic photography, which comprises dissolving or uniformly dispersing in an organic solvent a composition consisting of (A) an epoxy resin or a modified epoxy resin obtained by the reaction of an epoxy resin with a polyfunctional compound having at least two carboxyl or amino groups per molecule, and (B) a bivalent or polyvalent metal complex compound or a bivalent or polyvalent metal salt, and then removing said orgnic solvent.
Claim 18
Dependent Claim
78 words
A process for preparing a toner for use in electrostatic photography, which comprises dissolving or uniformly dispersing in an organic solvent a composition consisting of (A) an epoxy resin or a modified epoxy resin obtained by the reaction of an epoxy resin with a polyfunctional compound having at least two carboxyl or amino groups per molecule, and (B) a bivalent or polyvalent metal complex compound or a bivalent or polyvalent metal salt, and then removing said orgnic solvent.
References Cited (Backward Citations)
JPS501803A
Cited
US4020761A
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JPS5229305A
Cited
JPS5276104A
Cited
US4259905A
Cited
US4308799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |