CA1158090A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
One part magnetic toner powder including a fluoroaliphatic surface treatment composition
Assignee: 3M Co
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Filing: 1981-09-24
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Granted: 1983-12-06
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Expires: 2001-09-24
Abstract
Abstract 201,417 CAN/JVL ABSTRACT A one-part, flowable, dry, electrostatically attractable toner powder comprising (a) particles each comprising a blend of from about 30 to 80 parts by weight thermoplastic binder and, correspondingly, from about 70 to 20 parts by weight magnetically responsive material; and (b) a surface treatment composition comprising 0.1 to 2 parts by weight fluoroaliphatic compound per 100 parts by weight of said particles. The toner powder possesses humidity resistance and improved image quality, particularly in terms of image sharpness.
Inventors
- 👤 Jan P. Roos
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-04 19:25
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/097; G03G9/09733; G03G9/09766
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
91 words
A one-part, flowable, dry, electrostatically attractable toner powder comprising (a) particles each comprising a blend of from about 30 to 80 parts by weight thermoplastic binder and, correspondingly from about 70 to 20 parts by weight magnetically responsive material; and (b) a layer of a surface treatment composition attached to each of said particles at or near the outer surface of said particles, said surface treat-ment composition comprising from about 0.1 to 2 parts by weight of a monomeric or polymeric fluoroaliphatic compound per 100 parts by weight of said particles.
Claim 2
Dependent Claim
91 words
A one-part, flowable, dry, electrostatically attractable toner powder comprising (a) particles each comprising a blend of from about 30 to 80 parts by weight thermoplastic binder and, correspondingly from about 70 to 20 parts by weight magnetically responsive material; and (b) a layer of a surface treatment composition attached to each of said particles at or near the outer surface of said particles, said surface treat-ment composition comprising from about 0.1 to 2 parts by weight of a monomeric or polymeric fluoroaliphatic compound per 100 parts by weight of said particles.
Claim 3
Dependent Claim
44 words
A toner powder in accordance with claim 1 wherein said surface treat-ment composition further comprises from about 0.1 to 2.5 parts by weight silicon dioxide per 100 parts by weight of said particles, said silicon dioxide having an average diameter smaller than said particles.
Claim 4
Dependent Claim
44 words
A toner powder in accordance with claim 1 or 2 wherein said surface treatment composition further comprises from about 0.1 to 2 parts by weight carbon per 100 parts by weight of said particles, said carbon having an average diameter smaller than said particles.
Claim 5
Dependent Claim
31 words
A toner powder in accordance with claim 1 wherein said fluoroaliphatic compound contains, within a single molecule, both a fluoroaliphatic group and a group which is attracted to said thermoplastic binder.
Claim 6
Dependent Claim
37 words
A toner powder in accordance with claim 4 wherein said fluoroaliphatic compound has the formula RfOmZ where Rf is a fluoroaliphatic group, Z is a term-inal group, and Qm is a linking group joining Rf and Z.
Claim 7
Dependent Claim
35 words
A toner powder in accordance with claim 5 wherein said fluoroaliphatic compound is selected from the group where M is hydrogen or a metallic ion, and a is an integer of from 5 to 50.
Claim 8
Dependent Claim
14 words
A toner powder according to claim 6 wherein said fluoroaliphatic compound is selected from
Claim 9
Independent Claim
138 words
A method of electrostatographic recording comprising: forming an electrostatic image pattern on a substrate; rendering said image pattern visible by contacting it with a one-part, flowable, dry, electrostatically attractable toner powder comprising (a) particles each comprising a blend of from about 30 to 80 parts by weight thermoplastic binder and, correspondingly, from about 70 to 20 parts by weight magnetically responsive material, and (b) layer of a surface treatment composition attached to each of said particles at or near the outer surface of said particles, said treatment composition comprising from about 0.1 to 2 parts by weight fluoroaliphatic compound per 100 parts by weight of said particles thereby adhering said toner powder to said electrostatic image pattern and thereby developing said electrostatic image pattern; and fixing said toner powder by means of heat, pressure, or heat and pressure.
Claim 10
Independent Claim
138 words
A method of electrostatographic recording comprising: forming an electrostatic image pattern on a substrate; rendering said image pattern visible by contacting it with a one-part, flowable, dry, electrostatically attractable toner powder comprising (a) particles each comprising a blend of from about 30 to 80 parts by weight thermoplastic binder and, correspondingly, from about 70 to 20 parts by weight magnetically responsive material, and (b) layer of a surface treatment composition attached to each of said particles at or near the outer surface of said particles, said treatment composition comprising from about 0.1 to 2 parts by weight fluoroaliphatic compound per 100 parts by weight of said particles thereby adhering said toner powder to said electrostatic image pattern and thereby developing said electrostatic image pattern; and fixing said toner powder by means of heat, pressure, or heat and pressure.
Claim 11
Independent Claim
119 words
A method of electrographic recording comprising: forming a differential image pattern of a one-part, flowable, dry, electrostatically attractable toner powder comprising (a) particles each comprising a blend of from about 30 to 80 parts by weight thermoplastic binder and, correspondingly, from about 70 to 20 parts by weight magnetically responsive material, and (b) a surface treatment composition comprising from about 0.1 to 2 parts by weight fluoroaliphatic compound per 100 parts by weight of said particles, said surface treatment composition being attached to the surface of said particles, thereby adhering said toner powder to said electrostatic image area and thereby developing said electrostatic image area; and fixing said toner powder by means of heat, pressure, or heat and pressure.
Claim 12
Independent Claim
119 words
A method of electrographic recording comprising: forming a differential image pattern of a one-part, flowable, dry, electrostatically attractable toner powder comprising (a) particles each comprising a blend of from about 30 to 80 parts by weight thermoplastic binder and, correspondingly, from about 70 to 20 parts by weight magnetically responsive material, and (b) a surface treatment composition comprising from about 0.1 to 2 parts by weight fluoroaliphatic compound per 100 parts by weight of said particles, said surface treatment composition being attached to the surface of said particles, thereby adhering said toner powder to said electrostatic image area and thereby developing said electrostatic image area; and fixing said toner powder by means of heat, pressure, or heat and pressure.
Claim 13
Dependent Claim
175 words
10 . A process of preparing a one-part flowable, dry, electrostatically attractable toner powder comprising: providing a plurality of particles each comprising a blend of from about 30 to 80 parts by weight thermoplastic binder and, correspondingly, from about 70 to 20 parts by weight magnetically responsive material; providing a surface treatment composition comprising from about 0.1 to 2 parts by weight fluoroaliphatic compound per 100 parts by weight of said particles; mixing said particles and said surface treatment composition together at a temperature less than the softening point of said thermoplastic binder for a time sufficient to at least loosely attach said surface treatment composition to the surface of said particles; heating said particles with attached surface treatment composition to a temperature of about the glass transition temperature of said thermoplastic binder with continued mixing; and maintaining said heating with continued mixing for a time sufficient to substantially permanently attach said surface treatment composition to said particles as a layer at or near the outer surface of said particles, thereby providing said toner composition.
Claim 14
Dependent Claim
175 words
10 . A process of preparing a one-part flowable, dry, electrostatically attractable toner powder comprising: providing a plurality of particles each comprising a blend of from about 30 to 80 parts by weight thermoplastic binder and, correspondingly, from about 70 to 20 parts by weight magnetically responsive material; providing a surface treatment composition comprising from about 0.1 to 2 parts by weight fluoroaliphatic compound per 100 parts by weight of said particles; mixing said particles and said surface treatment composition together at a temperature less than the softening point of said thermoplastic binder for a time sufficient to at least loosely attach said surface treatment composition to the surface of said particles; heating said particles with attached surface treatment composition to a temperature of about the glass transition temperature of said thermoplastic binder with continued mixing; and maintaining said heating with continued mixing for a time sufficient to substantially permanently attach said surface treatment composition to said particles as a layer at or near the outer surface of said particles, thereby providing said toner composition.
Claim 15
Dependent Claim
14 words
A toner powder in accordance with claim 4 wherein said fluoroaliphatic compound is polymeric.
References Cited (Backward Citations)
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