EP0507373A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A toner powder for the development of latent electrostatic or magnetic images and a process for forming fixed images on an image receiving material
Assignee: Canon Production Printing Netherlands BV
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Filing: 1992-03-12
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Granted: —
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Expires: 2012-03-12
Abstract
Abstract A toner powder for the development of latent electrostatic or magnetic images, said toner powder containing a polyester resin based on an etherified diphenol and a dicarboxylic acid and the polyester resin being mixed with a reaction product of an epoxy resin and a phenol compound or a carboxylic acid, and a process for forming fixed images on an image receiving material, in which an image is applied to a medium by means of said toner powder, the surface of the medium consisting of material having a lower affinity for the softened toner powder than the image receiving material and the toner powder being softened by heating before and/or during transit through the pressure zone.
Inventors
- 👤 Marcel Leonard Marie Pennings
- 👤 Rudolf Antonius Maria Venderbosch
- 👤 Wilhelmus Hendrikus Gerardus Albrink
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 05:45
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08742; G03G9/08762; G03G9/08753; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/105
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
52 words
A toner powder for the development of latent electrostatic or magnetic images, said toner powder containing a polyester resin based on an etherified diphenol and a dicarboxylic acid, characterised in that the polyester resin is mixed with a reaction product of an epoxy resin and a phenol compound or a carboxylic acid.
Claim 2
Dependent Claim
53 words
A toner powder according to claim 1, characterised in that the polyester resin has a number-averaged molecular weight of at least 2500, the epoxy resin has a number-averaged molecular weight of less than 1200 and the epoxy groups of the epoxy resin are blocked for at least 60% by a monofunctional phenol compound.
Claim 3
Dependent Claim
27 words
A toner powder according to claim 2, characterised in that the epoxy groups of the epoxy resin are blocked for at least 80% by the phenol compound.
Claim 4
Dependent Claim
40 words
A toner power according to one or more of the preceding claims, characterised in that the polyester resin is mixed with a reaction product of an epoxy resin containing mainly the diglycidyl ether of 2,2-bis(4-hydroxyphenyl)propane and a monofunctional phenol compound.
Claim 5
Dependent Claim
38 words
A toner powder according to one or more of the preceding claims, characterised in that the polyester resin : reaction product ratio of the epoxy resin and phenol compound is between 80 : 20 and 20 : 80.
Claim 6
Dependent Claim
33 words
A toner powder according to claim 5, characterised in that the polyester resin : reaction product ratio of the epoxy resin and phenol compound is between 60 : 40 and 30 : 70.
Claim 7
Dependent Claim
33 words
A toner powder according to one or more of the preceding claims, characterised in that the glass-transition temperature of the reaction product of the epoxy resin and the phenol compound is above 35°C.
Claim 8
Dependent Claim
33 words
A toner powder according to one or more of the preceding claims, characterised in that the glass-transition temperature of the reaction product of the epoxy resin and the phenol compound is above 45°C.
Claim 9
Dependent Claim
47 words
A toner powder according to one or more of the preceding claims 1 to 6, characterised in that the polyester resin is mainly a reaction product of one or more alkoxylated bisphenol compounds and one or more aromatic and/or fully saturated dicarboxylic acids or their corresponding esters.
Claim 10
Dependent Claim
64 words
A toner powder according to claim 9, characterised in that the polyester resin is mainly a reaction product of polyoxyethylene(2)-2,2-bis(4-hydroxyphenyl)propane and one or more dicarboxylic acids from the following series: phthalic acid, terephthalic acid, isophthalic acid or the corresponding esters of these acids, or a reaction product of polyoxyethylene(2)-2,2-bis(4-hydroxyphenyl)propane and one or more of these carboxylic acids or the corresponding esters and adipic acid.
Claim 11
Dependent Claim
82 words
A process for forming fixed images on an image receiving material, in which an image is applied to a medium by means of toner powder containing thermoplastic resin, the surface of the medium consisting of material having a lower affinity for the softened toner powder than the image receiving material and the toner powder being softened by heating before and/or during transit through the pressure zone, using a toner powder according to one or more of the preceding claims 1 to 10.
References Cited (Backward Citations)
GB2014325A
Cited
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