Claims
- 1. A negative-electrification powder toner for electrophotography having a softening point in the range of about 90.degree. C. to 110.degree. C., and comprising 100 parts by weight of a binding resin essentially consisting of a solid silicon varnish having a molecular weight in the range of 500 to 4000; 1 to 40 parts by weight of a colorant; and further consisting of an electrification-controlling agent and an auxiliary agent.
- 2. A toner as claimed in claim 1, wherein the colorant is selected from the group consisting of carbon black, lamp black, acetylene black, channel black and diamond black.
- 3. A toner as claimed in claim 1, wherein the colorant is selected from the group consisting of phthalocyanine blue, permanent blue, Fanal.TM. blue, nigrosine blue, aniline blue, Calconyl.TM. blue, ultramarine blue, cobalt blue and methylene blue chloride.
- 4. A toner as claimed in claim 1, wherein the colorant is selected from the group consisting of pigment red and Du-Pont.TM. oil red.
- 5. A toner as claimed in claim 1, wherein the colorant is selected from the group consisting of benzidine yellow, quinoline yellow, chrome yellow, chrome green, phthalocyanine green, malachite green oxalate, rose Bengal and nigrosine dye.
- 6. A toner as claimed in claim 1, wherein the binding resin is a silicon varnish selected from the group consisting of methylsilicon varnish, phenylsilicon varnish and methlphenylsilicon varnish.
- 7. A toner as claimed in claim 1, wherein said electrification-controlling agent is a finely-divided hydrophobic silica powder.
- 8. A toner as claimed in claim 1, wherein the toner contains further an auxiliary agent such as zinc oxide, iron oxide, titanium oxide, aluminum oxide, silicon oxide, talc, quartz, or marble.
Priority Claims (1)
Number |
Date |
Country |
Kind |
59-180149 |
Aug 1984 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 717,950, filed Mar. 29, 1985, now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (3)
Number |
Date |
Country |
42-23910 |
Mar 1970 |
JPX |
43-24748 |
Apr 1980 |
JPX |
12558 |
Jan 1985 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
717950 |
Mar 1985 |
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