EP0053888A2
Expired / Lapsed
EP
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Electrostatic toner composition
Assignee: Xerox Corp
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Filing: 1981-11-24
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Granted: —
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Expires: 2001-11-24
Abstract
Abstract A dry electrostatic toner composition containing a resin, a colorant or pigment, and an organic sulfate or sulfonate charge control additive of the following formula: <CHEM> wherein R1 is an alkyl radical containing from about 12 carbon atoms to about 22 carbon atoms, and preferably from about 14 carbon atoms to 18 carbon atoms, R2 and R3 are independently selected from alkyl groups containing from about 1 carbon atom to about 5 carbon atoms, R4 is an alkylene group containing from about 1 carbon atom to about 5 carbon atoms, R5 is a tolyl group or an alkyl group containing from about 1 carbon atom to about 3 carbon atoms and n is the number 3 or 4. Such toners, especially when combined with carrier materials, are useful for causing the development of images in an electrophotographic system.
Inventors
- 👤 Chin H. Lu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 00:49
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/097; G03G9/09733; G03G9/09741; G03G9/0975
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
115 words
A dry electrostatic toner composition including a resin, a pigment, and a charge control agent, characterised in that the charge control agent comprises from 0.1 to 10 percent based on the weight of toner of an organic sulfate or sulfonate compound of the following formula: wherein R 1 is an alkyl radical containing from 12 to 22 carbon atoms, R 2 and R 3 are independently selected from alkyl groups containing from 1 to 5 carbon atoms, R 4 is an alkylene group containing from 1 to 5 carbon atoms, R 5 is a tolyl group or an alkyl group containing from 1 to 3 carbon atoms and n is the number 3 or 4.
Claim 2
Dependent Claim
115 words
A dry electrostatic toner composition including a resin, a pigment, and a charge control agent, characterised in that the charge control agent comprises from 0.1 to 10 percent based on the weight of toner of an organic sulfate or sulfonate compound of the following formula: wherein R 1 is an alkyl radical containing from 12 to 22 carbon atoms, R 2 and R 3 are independently selected from alkyl groups containing from 1 to 5 carbon atoms, R 4 is an alkylene group containing from 1 to 5 carbon atoms, R 5 is a tolyl group or an alkyl group containing from 1 to 3 carbon atoms and n is the number 3 or 4.
Claim 3
Dependent Claim
54 words
A toner composition in accordance with claim 1 wherein R 1 is an alkyl group containing from 14 to 18 carbon atoms, R 21 R 3' are alkyl groups having from 1 to 5 carbon atoms, R 4 is an alkylene group, R 5 is a tolyl radical, and n is the number 3.
Claim 4
Dependent Claim
37 words
A toner composition in accordance with claim 1 wherein R 1 is stearyl, R 2 , R 3 , are methyl, R 4 is methylene or ethylene, R 5 is methyl, and n is the number 4.
Claim 5
Dependent Claim
45 words
A toner composition in accordance with claim 1 wherein the charge control agent is stearyl dimethyl benzyl ammonium paratoluene sulfonate; stearyl dimethyl benzyl ammonium methyl sulfate; stearyl dimethyl phenethyl ammonium methyl sulfate; stearyl dimethyl phenethyl ammonium paratoluene sulfonate; or cetyl diethyl benzyl ammonium para-toluene sulfonate.
Claim 6
Dependent Claim
26 words
A developer composition for use in electrostatic imaging systems, comprising a carrier material and a toner composition according to any one of claims 1 to 4.
Claim 7
Dependent Claim
25 words
The developer composition of claim 5 wherein the carrier is a perfluoroalkoxy fluoropolymer coated Hoeganaes steel carrier, or a vinylidene fluoride resin coated steel carrier.
Claim 8
Dependent Claim
23 words
A developer composition in accordance with claim 5 or claim 6 wherein 1 part of toner to 200 parts of carrier are employed.
Claim 9
Independent Claim
61 words
A method of imaging comprising forming a negative electrostatic latent image on a photoreceptor, contacting the image with a developer composition comprising a positively charged dry electrostatic toner composition and a carrier, the developer composition being in accordance with any one of claims 5 to 7, subsequently transferring the developed latent image to a substrate, and permanently affixing the image thereto.
Claim 10
Dependent Claim
21 words
A method of imaging in accordance with claim 8 wherein there is used as the fixing mechanism a soft roll fuser.
References Cited (Backward Citations)
No citation records indexed.
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