Patent US4663263A successfully refreshed from Google Patents.
US4663263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toner, charge-imparting material and composition containing substituted guanidine compound for electrophotography
Assignee: Canon Inc
•
Filing: 1985-10-18
•
Granted: 1987-05-05
•
Expires: 2005-10-18
Abstract
Abstract A triboelectrically chargeable composition for use in development of electrostatic latent images. The composition contains a substituted guanidine compound having at least one substituent group. The substituted guanidine compound is preferably one represented by the formula ##STR1## wherein R 1 , R 2 , R 3 , R 4 and R 5 are the same or different groups including hydrogen atom, alkyl, cycloalkyl, alkenyl, aryl, aralkyl, alkaryl, and heterocyclic groups, of which a hydrogen atom may be further replaced by a substituent group, and at least one of R 1 , R 2 , R 3 , R 4 and R 5 is a group other than hydrogen. The composition is embodied typically as a positively chargeable toner and also as a charge-imparting material for charging a toner.
Inventors
- 👤 Takeshi Ikeda
- 👤 Eiichi Imai
- 👤 Hiroshi Fukumoto
- 👤 Katsuhiko Tanaka
- 👤 Koshi Suematsu
- 👤 Motoo Urawa
- 👤 Masanori Takenouchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:34
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0806; G03G15/0812; G03G15/0818; G03G9/00; G03G9/08; G03G9/097; G03G9/09733; G03G9/09775
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
140 words
A positively chargeable dry toner for developing electrostatic images, comprising: a binder resin, a colorant or a magnetic material and a substituted guanidine compound having at least one substituent group, said substituted guanidine compound being represented by the following formula (I): ##STR7## wherein R 1 , R 2 , R 3 , R 4 and R 5 are the same or different groups including hydrogen atom, alkyl, cycloalkyl, alkenyl, aryl, aralkyl, alkaryl, and heterocyclic groups, of which a hydrogen atom may be further replaced by a substituent group, and at least one of R 1 , R 2 , R 3 , R 4 and R 5 is a group other than hydrogen, in which said substituted guanidine compound is contained in a proportion of 0.1 to 10 parts by weight per 100 parts by weight of said binder resin.
Claim 2
Dependent Claim
140 words
A positively chargeable dry toner for developing electrostatic images, comprising: a binder resin, a colorant or a magnetic material and a substituted guanidine compound having at least one substituent group, said substituted guanidine compound being represented by the following formula (I): ##STR7## wherein R 1 , R 2 , R 3 , R 4 and R 5 are the same or different groups including hydrogen atom, alkyl, cycloalkyl, alkenyl, aryl, aralkyl, alkaryl, and heterocyclic groups, of which a hydrogen atom may be further replaced by a substituent group, and at least one of R 1 , R 2 , R 3 , R 4 and R 5 is a group other than hydrogen, in which said substituted guanidine compound is contained in a proportion of 0.1 to 10 parts by weight per 100 parts by weight of said binder resin.
Claim 3
Dependent Claim
45 words
The toner according to claim 1, wherein said substituted guanidine compound is a compound represented by the following formula (II): ##STR8## wherein R 1 and R 3 are respectively an aryl group, and R 5 is hydroegn atom, an alkyl group or an aryl group.
Claim 4
Dependent Claim
27 words
The toner according to claim 2, wherein R 1 and R 3 are the same or different groups selected from aryl groups respectively having 6-30 carbon atoms.
Claim 5
Dependent Claim
25 words
The toner according to claim 2, wherein R 5 is an alkyl group having 1-20 carbon atoms or an aryl group having 6-30 carbon atoms.
Claim 6
Dependent Claim
28 words
The toner according to claim 1, wherein said binder resin comprises a copolymer of two or more members selected from the group consisting of styrene, acrylates and methacrylates.
Claim 7
Dependent Claim
17 words
The toner according to claim 1, which has an average particle size of 5 to 20 microns.
Claim 8
Dependent Claim
31 words
The toner according to claim 1, wherein the magnetic material is used in an amount of 20 to 200 parts by weight per 100 parts by weight of the binder resin.
Claim 9
Dependent Claim
20 words
The toner according to claim 7, wherein the magnetic material has an average particle size of 0.1 to 2 microns.
Claim 10
Dependent Claim
55 words
The toner according to claim 1, wherein the colorant is a dye or pigment selected from the group consisting of Carbon Black, Lamp Black, Iron Black, ultramarine blue, Aniline Blue, Phthalocyanine Blue, Phthalocyanine Green, Hansa Yellow G, Rhodamine 6G Lake, Chalcooil Blue, Chrome Yellow, Quinacridone, Benzidine Yellow Rose Bengal, triarylmethane dyes, monoazo and disazo dyes.
Claim 11
Dependent Claim
62 words
The toner according to claim 1, wherein the binder resin is a polymer selected from the group consisting of styrene homopolymer, styrene derivative homopolymer, styrene copolymer, polyvinyl chloride, polyvinyl acetate, polyethylene, polypropylene, polyesters, polyurethanes, polyamides, epoxy resins, polyvinyl butyral, polyacrylic acid resin, rosin, modified rosins, terpene resin, phenolic resins, aliphatic or alicyclic hydrocarbon resins, aromatic petroleum resin, chlorinated paraffin, and paraffin wax.
Claim 12
Dependent Claim
40 words
The toner according to claim 5, wherein the binder resin is a polymer selected from the group consisting of styrene-acrylate copolymer, styrene-methacrylate copolymer, acrylate-methacrylate copolymer, a copolymer of two or more acrylates and a copolymer of two or more methacrylates.
Claim 13
Dependent Claim
29 words
The toner according to claim 11, wherein the binder resin is a copolymer selected from the group consisting of styrene-butyl methacrylate copolymer, styrene-2-ethylhexyl acrylate copolymer, and styrene-butyl acrylate copolymer.
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) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |