US5143809A
Expired / Lapsed
US
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Color toner
Assignee: Konica Minolta Inc
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Filing: 1990-12-11
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Granted: 1992-09-01
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Expires: 2010-12-11
Abstract
Abstract There is disclosed a color toner having an excellent fixability, an improved antioffset property and a superior transparency of an image fixed on an OHP sheet. The color toner comprises 100 parts by weight of a polyester resin prepared by condensation polymerization of the following components (1) and (2), 0.1 to 5 parts by weight of a zinc complex of an aromatic oxycarboxylic acid which may have a substituent, and 1 to 20 parts by weight of a colorant; Component (1): diol represented by the following Formula (a): ##STR1## wherein R represents an ethylene group or a propylene group; and X and Y each are an integer, provided that the sum of X and Y is 2 to 7 in average: Component (2): a mixture of a divalent acid component comprising a divalent carboxylic acid having an aliphatic hydrocarbon side chain of 3 to 22 carbon atoms or a lower alkyl ester thereof, and a trivalent acid component comprising a trivalent carboxylic acid or an anhydride thereof in a ratio of 10 to 50 mole % of the total acid components.
Inventors
- 👤 Tadashi Kaneko
- 👤 Shoichi Nakano
- 👤 Yoshiaki Kobayashi
- 👤 Takahira Kasuya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:48
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08742; G03G9/08755; G03G9/097; G03G9/09783
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
159 words
A color toner comprising 100 parts by weight of a polyester resin prepared by condensation polymerization of the following components (1) and (2), 0.1 to 5 parts by weight of a zinc complex of an aromatic oxycarboxylic acid which may have a substituent, and 1 to 20 parts by weight of a colorant; Component (1): diol represented by the following Formula (a): ##STR5## wherein R represents an ethylene group or a propylene group; and X and Y each represent an integer, provided that a sum of X and Y is within a range of 2 to 7 in average: Component (2): a mixture of a divalent acid component comprising a divalent carboxylic acid having an aliphatic hydrocarbon side chain of 3 to 22 carbon atoms or a lower alkyl ester thereof, and a trivalent acid component comprising a trivalent carboxylic acid or an anhydride thereof in a ratio of 10 to 50 mole % of the total acid components.
Claim 2
Dependent Claim
159 words
A color toner comprising 100 parts by weight of a polyester resin prepared by condensation polymerization of the following components (1) and (2), 0.1 to 5 parts by weight of a zinc complex of an aromatic oxycarboxylic acid which may have a substituent, and 1 to 20 parts by weight of a colorant; Component (1): diol represented by the following Formula (a): ##STR5## wherein R represents an ethylene group or a propylene group; and X and Y each represent an integer, provided that a sum of X and Y is within a range of 2 to 7 in average: Component (2): a mixture of a divalent acid component comprising a divalent carboxylic acid having an aliphatic hydrocarbon side chain of 3 to 22 carbon atoms or a lower alkyl ester thereof, and a trivalent acid component comprising a trivalent carboxylic acid or an anhydride thereof in a ratio of 10 to 50 mole % of the total acid components.
Claim 3
Dependent Claim
37 words
The color toner of claim 1, wherein the diol represented by Formula (a) is selected from polyoxypropylene (2.2)-2,2-bis (4-hydroxyphenyl) propane, polyoxypropylene (3.3)-2,2-bis (4-hydroxyphenyl) propane, polyoxyethylene (2.0)-2,2-bis (4-hydroxyphenyl) propane, and polyoxypropylene (2. 0) polyoxyethylene (2. 0)-2,2-bis (4-hydroxyphenyl) propane.
Claim 4
Dependent Claim
57 words
The color toner of claim 1, wherein the divalent carboxylic acid having an aliphatic hydrocarbon side chain of 3 to 22 carbon atoms or the lower alkyl ester thereof is selected from 1,2,4-benzenetricarboxylic acid, 1,2,5-benzenetricarboxylic acid, 1,2,4-cyclohexanetricarboxylic acid, 2,5,7-naphthalentricarboxylic acid, 1,2,4-naphthalentricarboxylic acid, 1, 2,4-butanetricarboxylic acid, 1,2,5-hexanetricarboxylic acid, 1,3-dicarboxy-2-methylcarboxy propene, 1,3-dicarboxy-2-methyl-2-methylcarboxy-propane-tetra(methyenecarboxy) methane, enpol trimeric acid, and anhydrides thereof.
Claim 5
Dependent Claim
14 words
The color toner of claim 3, wherein the divalent carboxylic acid is 1,2,4-benzenetricarboxylic anhydride.
Claim 6
Dependent Claim
46 words
The color toner of claim 1, wherein the aromatic oxycarboxylic acid is selected from salicylic acid, 3,5-dialkyl salicylic acid, 2-hydroxy-3-naphthoic acid, alkyl-2-hydroxy3-naphthoic acid, 5,6,7,8-tetrahydro-2-hydroxy-3-naphthoic acid, alkyl-5,6,7,8-tetrahydro-2-hydroxy-3-naphthoic acid, 1-hydroxy-2-naphthoic acid, alkyl-1-hydroxy-2-naphthoic acid, 5,6,7,8-tetrahydro-1-hydroxy-2-naphthoic acid, 8-hydroxy -1-naphthoic acid, wherein the alkyl group has 4 to 9 carbon atoms.
Claim 7
Dependent Claim
19 words
The color toner of claim 1, wherein a softening point of the polyester resin is 120° to 160° C.
Claim 8
Dependent Claim
33 words
The color toner of claim 3, wherein the divalent carboxylic acid or the lower alkyl ester thereof is added in a proportion of 1 to 50 mol % of the total monomer components.
Claim 9
Dependent Claim
15 words
The color toner of claim 7, wherein the proportion is 10 to 30 mol %.
References Cited (Backward Citations)
US4585723A
Cited
US4656112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-09-01 | 1996-03-02 | 1996-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-01 | 2000-03-02 | 2000-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-01 | 2004-03-02 | 2004-09-01 | $7700.00 | Window Closed / Lapsed |