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US4486559A
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Toner composition for the development of electrostatic latent images and a method of preparing the same
Assignee: Konica Minolta Inc
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Filing: 1981-06-23
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Granted: 1984-12-04
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Expires: 2001-06-23
Abstract
Abstract Herein disclosed are a toner composition for the development of electrostatic latent images which comprises a polymer obtained by polymerizing a polymerizable monomer or monomers in the presence of a chlorinated polyolefin, and a method for preparing the same.
Inventors
- 👤 Hideki Murata
- 👤 Sadatugu Terada
- 👤 Kiyoshi Tamaki
- 👤 Tsuneo Wada
- 👤 Akitoshi Matsubara
- 👤 Hiroyuki Takagiwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:56
CPC Classifications
C; C08; C08F; C08F255/00; G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08702; G03G9/08713; G03G9/08715
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
59 words
A toner composition for the development of electrostatic latent images which comprises a polymer obtained by polymerizing a polymerizable monomer or monomers in the presence of a chlorinated polyolefin having a degree of chlorination of 0.7 to 0.85 per carbon atom and at least one agent selected from the group consisting of a coloring agent and a magnetic material.
Claim 2
Dependent Claim
59 words
A toner composition for the development of electrostatic latent images which comprises a polymer obtained by polymerizing a polymerizable monomer or monomers in the presence of a chlorinated polyolefin having a degree of chlorination of 0.7 to 0.85 per carbon atom and at least one agent selected from the group consisting of a coloring agent and a magnetic material.
Claim 3
Dependent Claim
23 words
A toner composition as claimed in claim 1 which comprises 1 to 30% by weight of said chlorinated polyolefin based on said polymer.
Claim 4
Dependent Claim
31 words
A toner composition as claimed in claim 1 wherein said polymer is selected from the group consisting of vinyl polymers, polyester resins, phenol-formaldehyde resins, polyamide resins, polyurea resins and epoxy resins.
Claim 5
Dependent Claim
32 words
A toner composition as claimed in claim 3 wherein said polymer is a vinyl polymer obtained by polymerizing at least one monomer selected from styrene, its derivatives and a methylenealiphatic monocarboxylic acid.
Claim 6
Dependent Claim
23 words
A toner composition as claimed in claim 1 wherein said polymer possesses a ring and ball softening point of 100° to 170° C.
Claim 7
Dependent Claim
21 words
A toner composition as claimed in claim 1 wherein said polymer possesses a glass transition point of 40° to 110° C.
Claim 8
Dependent Claim
24 words
A toner composition as claimed in claim 1 wherein the grain size of the toner is in the range of 7 to 50 microns.
Claim 9
Dependent Claim
26 words
A toner composition as claimed in claim 1 wherein said polymer is obtained by polymerizing the monomer or monomers in the presence of a cross-linking agent.
Claim 10
Dependent Claim
35 words
A toner composition as claimed in claim 8 wherein the added amount of said cross-lihking agent is 0.005 to 20% by weight based on the total amount of the monomer or monomers to be polymerized.
Claim 11
Dependent Claim
25 words
A toner composition as claimed in claim 1 wherein said polymer is obtained by polymerizing the monomer or monomers in the presence of a prepolymer.
Claim 12
Dependent Claim
20 words
A toner composition as claimed in claim 10 wherein said prepolymer has an average molecular weight of 2,000 to 2,000,000.
Claim 13
Dependent Claim
33 words
A toner composition as claimed in claim 10 wherein the added amount of said prepolymer is 5 to 95 parts by weight based on 100 parts by weight of said monomer or monomers.
Claim 14
Dependent Claim
30 words
A toner composition as claimed in claim 1 which is to be used for the roller fixing method and which further comprises a releasing agent to prevent the off-set phenomenon.
Claim 15
Dependent Claim
19 words
A toner composition as claimed in claim 13 wherein said releasing agent is a low molecular weight olefinic polymer.
Claim 16
Dependent Claim
21 words
A toner composition as claimed in claim 14 wherein said olefinic polymer has an average molecular weight of 1,000 to 45,000.
Claim 17
Dependent Claim
37 words
A toner composition as claimed in claim 13 wherein said releasing agent is used in an amount of 1 to 20 parts by weight based on 100 parts by weight of the resin components of the toner.
Claim 18
Dependent Claim
15 words
A toner composition as claimed in claim 1 wherein said composition comprises a magnetic material.
Claim 19
Independent Claim
58 words
A method for preparing a toner composition for the development of electrostatic latent images which comprises polymerizing a monomer or monomers in the presence of a chlorinated polyolefin having a degree of chlorination of 0.7 to 0.85 per carbon atom and at least one agent selected from the group consisting of a coloring agent and a magnetic material.
Claim 20
Independent Claim
58 words
A method for preparing a toner composition for the development of electrostatic latent images which comprises polymerizing a monomer or monomers in the presence of a chlorinated polyolefin having a degree of chlorination of 0.7 to 0.85 per carbon atom and at least one agent selected from the group consisting of a coloring agent and a magnetic material.
Claim 21
Dependent Claim
35 words
A method as claimed in claim 18 wherein said chlorinated polyolefin exists in the polymerization system in an amount of 1 to 30% by weight based on the total amount of the monomer or monomers.
Claim 22
Dependent Claim
36 words
A method as claimed in claim 18 wherein said monomer or monomers are polymerized by means of a polymerization method selected from the group consisting of the suspension polymerization, emulsion polymerization, bulk polymerization and solution polymerization.
Claim 23
Dependent Claim
33 words
A method as claimed in claim 18 wherein said monomer or monomers are selected from the group consisting of a vinyl monomer, a dibasic acid, a glycol, caprolactam, a diamine and a diisocyanate.
Claim 24
Dependent Claim
19 words
A method as claimed in claim 18 wherein the polymerization is conducted in the presence of a cross-linking agent.
Claim 25
Dependent Claim
33 words
A method as claimed in claim 18 wherein the amount of said cross-linking agent is 0.005 to 20% by weight based on the total amount of the monomer or monomers to be polymerized.
Claim 26
Dependent Claim
18 words
A method as claimed in claim 18 wherein the polymerization is conducted in the presence, of a prepolymer.
Claim 27
Dependent Claim
31 words
A method as claimed in claim 24 wherein the amount of said prepolymer is 5 to 95 parts by weight based on 100 parts by weight of said monomer or monomers.
Claim 28
Dependent Claim
14 words
A toner composition as claimed in claim 17 which also contains a coloring agent.
Claim 29
Dependent Claim
15 words
A toner composition as claimed in claim 26 wherein said coloring agent is carbon black.
Claim 30
Dependent Claim
20 words
A toner composition as claimed in claim 1 which contains a coloring agent and said coloring agent is carbon black.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-04 | 1988-06-04 | 1988-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-04 | 1992-06-04 | 1992-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-04 | 1996-06-04 | 1996-12-04 | $7700.00 | Window Closed / Lapsed |