FR2338520A1 - Developer compsn. for electrostatic images - with oxidised aluminium particles as carrier and pigmented fumaric acid-propoxylated bisphenol polyester as toner - Google Patents
Developer compsn. for electrostatic images - with oxidised aluminium particles as carrier and pigmented fumaric acid-propoxylated bisphenol polyester as tonerInfo
- Publication number
- FR2338520A1 FR2338520A1 FR7714165A FR7714165A FR2338520A1 FR 2338520 A1 FR2338520 A1 FR 2338520A1 FR 7714165 A FR7714165 A FR 7714165A FR 7714165 A FR7714165 A FR 7714165A FR 2338520 A1 FR2338520 A1 FR 2338520A1
- Authority
- FR
- France
- Prior art keywords
- fumaric acid
- toner
- polyester
- acid
- mixt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/087—Binders for toner particles
- G03G9/08742—Binders for toner particles comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- G03G9/08755—Polyesters
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/10—Developers with toner particles characterised by carrier particles
Abstract
Developer compsn. for electrostatic images comprises a mixt. of (1) support particles of an aluminium (alloy) which are surface oxidised; and (2) toner particles consisting of (a) a pigment and (b) a binder comprising one or more polyester resins derived from (i) fumaric acid or a mixt. of fumaric acid and isophthalic acid contg. >=95 mol. % fumaric acid and (ii) a mixt. of propoxylated bisphenol polyols of formula (I): -CH(CH3)-O-)m-H (I) in which m and n are whole numbers and m+n = 2-7, the polyester being made using an amt. of acid and polyol such that the ratio COOH gp./OH gp. = 1.2-0.8:1. Pref. the propoxylated nisphenol is a reaction prod. of 2-3 moles propylene oxide with 1 mole 2,2-bis-(4-hydroxyphenyl)-propane. The polyester binder pref. has an acid value is not >20. The pigment is pref. fumed carbon black, used e.g. at 5-20 wt. % on the total wt. of the toner. The developer compsn. gives optimum deposition of toner onto the latent electrostatic image and give high density images using the cascade development system.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB837077 | 1977-02-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2338520A1 true FR2338520A1 (en) | 1977-08-12 |
FR2338520B1 FR2338520B1 (en) | 1980-05-23 |
Family
ID=9851237
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7714165A Granted FR2338520A1 (en) | 1977-02-28 | 1977-05-06 | Developer compsn. for electrostatic images - with oxidised aluminium particles as carrier and pigmented fumaric acid-propoxylated bisphenol polyester as toner |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2338520A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0010801A1 (en) * | 1978-10-31 | 1980-05-14 | Agfa-Gevaert N.V. | Composition of matter and method for electrostatic image development |
EP0122650A1 (en) * | 1983-04-13 | 1984-10-24 | Agfa-Gevaert N.V. | Toner composition for use in the developing of electrostatic charge patterns |
US4770969A (en) * | 1982-08-30 | 1988-09-13 | Konishiroku Photo Industry Co., Ltd. | Heat fusible toners for developing electrostatic images |
-
1977
- 1977-05-06 FR FR7714165A patent/FR2338520A1/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0010801A1 (en) * | 1978-10-31 | 1980-05-14 | Agfa-Gevaert N.V. | Composition of matter and method for electrostatic image development |
US4331755A (en) * | 1978-10-31 | 1982-05-25 | Agfa-Gevaert N.V. | Toner composition for electrostatic image development |
US4770969A (en) * | 1982-08-30 | 1988-09-13 | Konishiroku Photo Industry Co., Ltd. | Heat fusible toners for developing electrostatic images |
EP0122650A1 (en) * | 1983-04-13 | 1984-10-24 | Agfa-Gevaert N.V. | Toner composition for use in the developing of electrostatic charge patterns |
Also Published As
Publication number | Publication date |
---|---|
FR2338520B1 (en) | 1980-05-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
DL | Decision of the director general to leave to make available licences of right | ||
ST | Notification of lapse |