JPH0534966A - Toner for electrophotography - Google Patents

Abstract

PURPOSE:To obtain a toner having satisfactory anti-offsetting property at the time of fixing and a low min. fixing temp. and preventing wrapping around a fixing roll by incorporating carnauba wax and a specified compd. as releasing agents. CONSTITUTION:This toner is based on a binding resin, a colorant and releasing agents. Polyester resin is used as the binding resin and carnauba wax and a fluorine-contg. sulfonate compd. represented by the formula are contained as the releasing agents. In the formula, MK<+> is Na<+>, K<+>, Li<+>, Ca<2+>, Ba<2+>, etc., n is a positive integer and k is an integer of 1-3. It is preferable that montan wax and oxidized rice wax are further contained as releasing agents.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toner used for developing an electric latent image or a magnetic latent image in electrophotography, electrostatic printing and the like. In particular, the present invention relates to an oilless toner that is sufficiently fixed at a lower temperature in a heat roll fixing method.

[0002]

2. Description of the Related Art In the case of a dry method, an electrostatic image formed by electrophotography, electrostatic printing, electrostatic recording or the like is generally developed by a dry toner containing a binder resin and a colorant as a main component and then copied. Transferred and fixed on paper. Although there are various methods for fixing a toner image, the heat roller fixing method is widely used because of its high thermal efficiency and high-speed fixing. When performing high-speed fixing by such a heat fixing method, the toner is required to have good low-temperature fixing property (or low fixing lower limit temperature), and for this reason, a binder resin having a low softening point is used. It However, when a low softening point resin is contained in the toner, a part of the toner image adheres to the surface of the heat roller at the time of fixing, and this transfers to the copy paper to cause scumming, a so-called offset property and winding phenomenon (particularly It often occurs when the heat roller temperature is low.).

Therefore, as means for preventing these phenomena, JP-A-51-143333 and JP-A-57-148752.
No. 58-97056 and No. 60-247250, solid silicone varnish, higher fatty acid,
It has been proposed to add higher alcohols, various waxes and the like, but none of them is known to exhibit sufficient anti-offt properties and wrapping resistance while maintaining good low-temperature fixability. Specifically, conventional polyolefin waxes such as low molecular weight polyethylene and low molecular weight polypropylene have good offset resistance, but low temperature fixability is insufficient, and plant waxes such as candelilla wax have offset resistance and low temperature fixability. Is good, but the wrapping resistance is not sufficient, and solid silicone varnish, solid silicone oil, amide wax, higher fatty acid, and higher alcohol have good low-temperature fixability but offset resistance and wrapping resistance. not enough. In addition, since the conventional release agent has poor dispersibility in the binder resin, the release agent is often separated from the toner and adheres to the photoconductor or the developing sleeve during development, so-called filming.
The carrier contamination also occurs, and it is difficult to stably form a high-quality image for a long period of time. Further, by including the various waxes described above, the difference between the triboelectric charge amount under high temperature and high humidity and the triboelectric charge amount under low temperature and low humidity (hereinafter referred to as Q / M environmental change) becomes large, and the image density change during the run is increased. However, there is a problem in that the problem is likely to occur, and the present situation is that no satisfactory improvement has been made yet.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to have sufficient offset resistance at the time of fixing, have a low fixing lower limit temperature, and prevent winding around a fixing roll.
Still another object is to provide a toner which is free from scumming and toner scattering and which can provide an image with high fidelity equivalent to the initial image even during continuous use and is suitable for high-speed fixing.

[0005]

According to the present invention, as a first invention, in an electrophotographic toner containing a binder resin, a colorant and a release agent as main components, the binder resin of the toner is polyester. Provided is an electrophotographic toner comprising a resin and a carnauba wax as a release agent and a fluorine-containing sulfonate compound represented by the following general formula 1.

[Chemical 1] As a second invention, in an electrophotographic toner containing a binder resin, a colorant and a release agent as main components, a polyester resin is used as the binder resin of the toner, and a montan wax and the following general are used as the release agent. There is provided an electrophotographic toner containing the fluorine-containing sulfonate compound represented by Formula 1.

[Chemical 1] Further, as a third invention, an electrophotographic toner containing an oxidized rice wax as a release agent is provided.

The amount of carnauba wax and montan wax used in the present invention is usually 0.5 to 20% by weight, preferably 1 to 10% by weight, based on the binder resin. By thus containing carnauba wax and montan wax, the toner of the present invention exhibits good low-temperature fixing property and excellent winding resistance and filming resistance.

It is desirable to use carnauba wax having an acid value of 2 or less and montan wax having an acid value of 15 or less. If the acid values of carnauba wax and montan wax exceed the above values, the difference in triboelectric charge amount due to environmental changes becomes large, which is not desirable.

Next, other materials used for the toner of the present invention will be described. A polyester resin is used as the binder resin used in the present invention. Among them, a polyester resin synthesized from a bisphenol diol type and a polycarboxylic acid can be used without impairing the vinyl chloride matting resistance and the color of the color material of the color toner. A good developer can be obtained. Further, by containing the fluorine-containing sulfonate compound represented by the above general formula 1, good offset resistance can be effectively obtained, and further, a good toner can be obtained even in Q / M environment fluctuation. You can

Examples of the fluorine-containing sulfonate compound represented by the general formula 1 used in the present invention include those shown in Table 1.

[0010]

[Table 1- (1)]

[Table 1- (2)]

As described above, the toner of the present invention uses the polyester resin as the binder resin, and the fluorine-containing sulfonate compound represented by the general formula 1 as an essential component together with carnauba wax or montan wax as the release agent. However, better offset resistance and wrapping resistance can be obtained by further including oxidized rice wax as a release agent.

The reason for this is not clear at this point in time, but the state of dispersion of the release agent in the toner is good, and since both of them are evenly dispersed and present, even if they are agitated for a long period of time, the release agent can be removed from the surface of the toner. It is considered that this is due to less detachment and suppression of toner adhesion to the carrier (toner spent) and filming to the photoconductor.

The amount of the oxidized rice wax used is 0.1 to 20 wt% with respect to the binder resin, preferably 1 to 10
wt%.

The colorants used in the present invention include carbon black, lamp black, iron black, ultramarine blue, nigrosine dye, aniline blue, phthalocyanine blue, phthalocyanine green, Hansa yellow G, rhodamine 6
G, lake, chalco oil blue, chrome yellow, quinacridone, benzidine yellow, rose bengal, triallylmethane dyes, monoazo dyes, disazo dyes, dyes, pigments, etc. You can The amount of these colorants used is usually 1 to 30 wt%, preferably 3 to the binder resin.
~ 20 wt%.

Further, when the toner of the present invention is used as a two-component type developer, it is used as a mixture with carrier powder.
As the carrier that can be used in the present invention, all known carriers can be used, for example, iron powder, ferrite powder, magnetic powder such as nickel powder, glass beads, etc., and their surfaces treated with a resin or the like. The thing etc. are mentioned.

Further, the toner of the present invention may further contain a magnetic material and be used as a magnetic toner. The magnetic material contained in the magnetic toner of the present invention includes magnetite, hematite, iron oxide such as ferrite, metals such as iron, cobalt, nickel, or aluminum of these metals,
Examples thereof include alloys of metals such as cobalt, copper, lead, magnesium, tin, zinc, antimony, beryllium, bismuth, cadmium, calcium, manganese, selenium, titanium, tungsten and vanadium, and mixtures thereof.

These ferromagnetic materials have an average particle size of 0.1 to 2 μm.
The amount of m is preferably about 20 to 200 parts by weight with respect to 100 parts by weight of the resin component, and particularly preferably about 40 with respect to 100 parts by weight of the resin component.
~ 150 parts by weight.

Further, the toner of the present invention may be mixed with additives as required. As the additive, for example, Teflon,
Lubricants such as zinc stearate or cerium oxide,
An abrasive such as silicon carbide, or a fluidity-imparting agent such as colloidal silica or aluminum oxide, an anti-caking agent, or a conductivity-imparting agent such as carbon black or tin oxide, or a fixing aid such as a low molecular weight polyolefin. is there.

[0019]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto. All parts are parts by weight.

[0020]Example 1       Polyester resin (number average molecular weight Mn       = 6000, weight average molecular weight Mw =       50,000, glass transition point Tg = 61 ° C.) 81 parts       Carnauba wax (oxidation 0.5) 4 parts       12 parts of carbon black (Mitsubishi Carbon Co. # 44)       Fluorine-containing sulfonate compound [Example- (1)] 3 parts Mix the above mixture thoroughly in a Henschel mixer.
After combining, roll mill at a temperature of 80-110 ℃ for about 40
Heat and melt for minutes, cool to room temperature, and powder the resulting kneaded product.
It was crushed and classified to obtain a toner having a particle diameter of 5 to 20 μm. this
3 parts of toner coated with silicone resin 100 to
Ball with 97 parts of 250 mesh ferrite carrier
The components were mixed with a mill to obtain a two-component developer. Next fixing roller
Plain paper copier equipped with Teflon coated roller
Set the developer in (our company's FT-7030) and heat it.
When a continuous copy test was performed at a roller temperature of 130 ° C
Roller, without any offset or winding phenomenon
Of course, good images are obtained after 100,000 copies
No filming on the photoconductor or developing sleeve
won. Also, as a fixing test, hot offset,
Field offset, winding occurrence temperature and fixing lower limit temperature
When the degree was measured, good results were obtained as shown in Table 2 below.
was gotten. Furthermore, 30 ° C 90%, 10 ° C 15%
The image is displayed under each environment and the charge amount is changed.
When measured, it was −27.3 μc / g, −26.8 μc
/ G, good results were obtained, and further good images
was gotten. Toner spent of developer after 100,000 sheets
Was measured, no toner spent was found.
It was

Comparative Example 1 A developer was obtained and a continuous copy test was conducted in the same manner as in Example 1 except that a low molecular weight (polypropylene (660P manufactured by Sanyo Kasei Co., Ltd.)) was used instead of the carnauba wax of Example 1. However, a wrapping phenomenon occurred, and a good image was not obtained.Fixing property was sufficient in hot offset property as shown in Table 1 below, but wrapping occurrence temperature and fixing lower limit temperature were high and sufficient. The low temperature fixability was not obtained, and the fluctuation rate was large even with environmental changes, resulting in insufficient results.

[0022]Example 2       Polyester resin (number average molecular weight Mn       = 5300, weight average molecular weight Mw =       51000, glass transition point Tg = 59.5 ° C.) 85 parts       Carnauba wax (oxidized 0.9) 3 parts       Carbon black (Mitsubishi Carbon Co. # 44) 9 parts       Fluorine-containing sulfonate compound [Example- (3)] 0.5 part       Chromium-containing monoazo dye 2 parts A mixture of the above composition was treated with Henschel Miki in the same manner as in Example 1.
After thoroughly stirring in a sir, roll mill at 80-110 ° C
After melting for about 40 minutes at room temperature and cooling to room temperature,
The kneaded product is pulverized and classified to obtain a toner having a particle size of 5 to 20 μm.
Got For 3.5 parts of this toner, 150 to 250
Iron oxide powder carrier of SH (TEFV made by Nippon Iron Powder Co., Ltd.) 9
6.5 parts were mixed with a ball mill to obtain a two-component developer.
It was Then, using this developer, continuous copying was performed in the same manner as in Example 1.
-When the test was conducted, the good result was obtained as in Example 1.
The fruit was obtained. The fixability of this product is shown in Table 2 below.
So good.

Example 3 A developer was obtained in the same manner as in Example 1 except that the fluorine-containing sulfonate compound [Example- (5)] was used. Next, when a continuous copy test was conducted on this developer in the same manner as in Example 1, good results were obtained as in Example 1. The fixability of this product was good as shown in Table 2 below.

Comparative Example 2 A developer was prepared in the same manner as in Example 2 except that the carnauba wax of Example 2 was not used, and a continuous copy test was conducted. A phenomenon occurred and a good image was not obtained. Furthermore, as shown in Table 2 below, the low temperature fixability was insufficient.

Comparative Example 3 A developer was prepared in the same manner as in Example 3 except that the carnauba wax of Example 3 was not used, and a continuous copy test was conducted. As with Comparative Example 2, the offset resistance was satisfactory. As a result, a winding phenomenon occurred and a good image could not be obtained. Furthermore, as shown in Table 2 below, the low temperature fixability was insufficient.

Example 4 A developer was obtained in the same manner as in Example 1 except that the fluorine-containing sulfonate compound [Example- (7)] was used. Next, when a continuous copy test was conducted on this developer in the same manner as in Example 1, good results were obtained as in Example 1. The fixability of this product was good as shown in Table 2 below.

Example 5 A developer was obtained in the same manner as in Example 1 except that the fluorine-containing sulfonate compound [Example- (10)] was used. Next, when a continuous copy test was conducted on this developer in the same manner as in Example 1, good results were obtained as in Example 1. The fixability of this product was good as shown in Table 2 below.

Comparative Example 4 Fluorine-containing sulfonate compound of Example 3 [Example- (5)]
A developer was prepared in the same manner as in Example 3 except that the composition was not used, and a continuous copy test was conducted.
The environmental change was a satisfactory result, but hot offset was slightly generated and a good image was not obtained. Furthermore, as shown in Table 1 below, the low temperature fixability was insufficient.

Comparative Example 5 Fluorine-containing sulfonate compound of Example 5 [Example- (7)]
A developer was prepared in the same manner as in Example 3 by using a chrome-containing azo dye instead of, and a continuous copy test was conducted. As in Comparative Example 2, the offset resistance and the wrapping resistance were satisfactory, but the results were satisfactory. , The Q / M environmental change was poor, and a good image could not be obtained.

Comparative Example 6 Fluorine-containing sulfonate compound of Example 5 [Example- (1
0)] was used instead of salicylic acid derivative zinc salt, and a developer was prepared in the same manner as in Example 3 and a continuous copy test was conducted. As with Comparative Example 2, offset resistance and wrapping resistance were satisfactory. It was, but the Q / M environmental changes were poor,
No good image was obtained.

Example 6 A toner was prepared in the same manner as in Example 1 except that montan ester wax was used instead of carnauba wax, and the toner was subjected to the same test as in Example 1. Similar results to Example 1 were obtained.

[0032]Example 7       Polyester resin (number average molecular weight Mn       = 5300, weight average molecular weight Mw =       51000, glass transition point Tg = 59.5 ° C.) 85 parts       Montane ester wax (acid value 12.0) 3 parts       Carbon black (Mitsubishi Carbon Co. # 44) 9 parts       Fluorine-containing sulfonate compound [Example- (2)] 0.5 part       Chromium-containing monoazo dye 2 parts A mixture of the above composition was treated with Henschel Miki in the same manner as in Example 1.
After thoroughly stirring in a sir, roll mill at 80-110 ° C
After melting for about 40 minutes at room temperature and cooling to room temperature,
The kneaded product is pulverized and classified to obtain a toner having a particle size of 5 to 20 μm.
Got For 3.5 parts of this toner, 150 to 250
Iron oxide powder carrier of SH (TEFV made by Nippon Iron Powder Co., Ltd.) 9
6.5 parts were mixed with a ball mill to obtain a two-component developer.
It was Then, using this developer, continuous copying was performed in the same manner as in Example 1.
-When the test was conducted, the good result was obtained as in Example 1.
The fruit was obtained. The fixability of this product is shown in Table 2 below.
So good.

Example 8 A developer was obtained in the same manner as in Example 6 except that the fluorine-containing sulfonate compound [Example- (3)] was used. Next, when a continuous copy test was conducted on this developer in the same manner as in Example 1, good results were obtained as in Example 1. The fixability of this product was good as shown in Table 2 below.

Example 9 A developer was obtained in the same manner as in Example 6 except that the fluorine-containing sulfonate compound [Example- (7)] was used. Next, when a continuous copy test was conducted on this developer in the same manner as in Example 1, good results were obtained as in Example 1. The fixability of this product was good as shown in Table 2 below.

Example 10 A developer was obtained in the same manner as in Example 6 except that the fluorine-containing sulfonate compound [Example- (10)] was used. Next, when a continuous copy test was conducted on this developer in the same manner as in Example 1, good results were obtained as in Example 1. The fixability of this product was good as shown in Table 2 below.

Comparative Example 7 Fluorine-containing sulfonate compound of Example 8 [Example- (3)]
A developer was prepared and a continuous copy test was conducted in the same manner as in Example 8 except that No. was used, but as in Comparative Example 5, the offset resistance and the wrapping resistance were satisfactory, but Q /
The environmental change of M was poor and a good image could not be obtained.

Comparative Example 8 Fluorine-containing sulfonate compound of Example 9 [Example- (7)]
A developer was prepared in the same manner as in Example 9 except that the chrome-containing azo dye was used, and a continuous copy test was conducted. As with Comparative Example 5, the offset resistance and the wrapping resistance were satisfactory, but Q A good image was not obtained because the environmental change of / M was poor.

Comparative Example 9 Fluorine-containing sulfonate compound of Example 10 [Example- (1
0)] was used and a developer was prepared in the same manner as in Example 10 using a salicylic acid derivative zinc salt, and a continuous copy test was conducted. As with Comparative Example 5, the offset resistance and the wrapping resistance were satisfactory. However, the environmental fluctuation of Q / M is bad,
No good image was obtained.

[0039]Example 11       Polyester resin (number average molecular weight Mn       = 6000, weight average molecular weight Mw =       50,000, glass transition point Tg = 61 ° C.) 81 parts       Carnauba wax (oxidation 0.9) 3 parts       Oxidized rice wax (oxidized 14.0) 2 parts       12 parts of carbon black (Mitsubishi Carbon Co. # 44)       Fluorine-containing sulfonate compound [Example- (1)] 2 parts Mix the above mixture thoroughly in a Henschel mixer.
And then roll mill for about 40 minutes at 80-110 ℃
After melting by heating and cooling to room temperature, the resulting kneaded product is pulverized.
To obtain a toner having a particle diameter of 5 to 20 μm. This toner
100 to 250 coated with silicone resin for 3 parts
Ball mill with 97 parts of ferrite carrier of mesh
By mixing, a two-component developer was obtained. Next, as a fixing roller
Plain paper copier equipped with a Teflon coated roller
FT-7030), and set the developer to a heat roller.
-When a continuous copy test was performed at a temperature of 130 ° C,
Initially without any offset or winding phenomenon
Of course, a good image was obtained even after 100,000 copies, and
No filming was found on the body or the developing sleeve.
Also, as a fixing test, hot offset and cold
Measures fusing, wrapping occurrence temperature and fixing lower limit temperature
As a result, good results were obtained as shown in Table 2 below.
It was Furthermore, 30 ° C 90%, 10 ° C 15%
Under the environment, the image is displayed and the charge amount is measured.
When found, -30.5 μc / g and -30.3 μc / g
Good results were obtained, and good images were obtained for each.
It was Further measure the toner spent of the developer after 100,000 sheets
As a result, no toner spent was recognized.

Example 1 2 Polyester resin (number average molecular weight Mn = 5300, weight average molecular weight Mw = 51000, glass transition point Tg = 59.5 ° C.) 85 parts Carnauba wax (oxidation 0.25) 1 part Oxidized rice wax (Oxidation 3.5) 4 parts Carbon black (Mitsubishi Carbon Co. # 44) 9 parts Fluorine-containing sulfonate compound [Example- (2)] 1 part Chromium-containing monoazo dye (Orient Chemical Bontron S-34) 2 parts Above The composition mixture was thoroughly stirred in a Henschel mixer in the same manner as in Example 11, and then 80-110 by a roll mill.
After heating and melting at a temperature of 40 ° C. for about 40 minutes and cooling to room temperature, the resulting kneaded product was pulverized and classified to obtain a toner having a particle size of 5 to 20 μm. 150 to 250 for 3.5 parts of this toner
Mesh iron oxide powder carrier (TEFV made by Nippon Iron Powder Co., Ltd.)
96.5 parts were mixed with a ball mill to obtain a two-component developer. When a continuous copy test was conducted in the same manner as in Example 1 using this developer, good results were obtained as in Example 1. The fixability of this product was good as shown in Table 2 below.

Example 13 A developer was obtained in the same manner as in Example 11 except that the fluorine-containing sulfonate compound [Example- (3)] was used. Next, when this developer was subjected to a continuous copy test in the same manner as in Example 11, good results were obtained as in Example 1.
The fixability of this product was good as shown in Table 2 below.

[0042]Example 14       Carnauba wax (oxidation 0.75) 3.5 parts       Oxidized rice wax (oxidized 10.0) 2 parts       Fluorine-containing sulfonate compound [Example- (7)] 2 parts A developer was obtained in the same manner as in Example 11 except that
It was Next, this developer was continuously copied in the same manner as in Example 11.
-As a result of the test, good results were obtained as in Example 1.
was gotten. The fixability of this product is shown in Table 2 below.
So good.

[0043]Example 15       Carnauba wax (oxidation 0.45) 3.0 parts       Oxidized rice wax (oxidized 13.0) 2.5 parts       Fluorine-containing sulfonate compound [Example- (10)] 2.5 parts A developer was obtained in the same manner as in Example 11 except that
It was Next, this developer was continuously copied in the same manner as in Example 11.
-As a result of the test, good results were obtained as in Example 1.
was gotten. The fixability of this product is shown in Table 2 below.
So good.

Comparative Example 10 A developer was prepared in the same manner as in Example 13 except that the fluorine-containing sulfonate compound example-3 of Example 13 was not used, and a continuous copy test was conducted. Although the offset resistance was a satisfactory result, a good image could not be obtained due to a poor Q / M environmental change.

Comparative Example 11 Fluorine-containing sulfonate compound of Example 14 [Example-
A developer was prepared in the same manner as in Example 13 except that (7) was not used, and a continuous copy test was conducted. As with Comparative Example 5, the offset resistance was satisfactory, but Q / M
A good image could not be obtained due to poor environmental change.

[0046]Example 16       Polyester resin (number average molecular weight Mn       = 6000, weight average molecular weight Mw =       50,000, glass transition point Tg = 61 ° C.) 85 parts       Montane ester wax (Oxidation 9.5) 3 parts       Oxidized rice wax (oxidized 15.0) 1 part       12 parts of carbon black (Mitsubishi Carbon Co. # 44)       Fluorine-containing sulfonate compound [Example- (1)] 2 parts Mix the above mixture thoroughly in a Henschel mixer.
And then roll mill for about 40 minutes at 80-110 ℃
After melting by heating and cooling to room temperature, the resulting kneaded product is crushed,
The toner was classified to obtain a toner having a particle size of 5 to 20 μm. This Tona
-100 to 25 with 3 parts coated with silicone resin
Ball mill with 97 parts of 0 mesh ferrite carrier
To obtain a two-component developer. Then with the fixing roller
A plain paper copier equipped with a Teflon coated roller
FT-7030), and set the developer to
The continuous copy test was performed at a temperature of 130 ° C.
The initial stage without any offset or winding phenomenon
Of course, a good image was obtained even after 100,000 copies,
No filming on photoreceptor or developing sleeve
It was Also, as a fixing test, hot offset, call
Do offset, winding generation temperature and fixing lower limit temperature
When measured, good results were obtained as shown in Table 2 below.
Was given. Furthermore, 30 ° C 90%, 10 ° C 15%
The image is displayed in each environment and the amount of charge is measured.
As a result, 27.5 μc / g and −26.1 μc / g
Good results were obtained, and good images were obtained for each.
It was Further measure the toner spent of the developer after 100,000 sheets
As a result, no toner spent was recognized.

[0047]Example 17       Polyester resin (number average molecular weight Mn       = 5300, weight average molecular weight Mw =       51000, glass transition point Tg = 59.5 ° C.) 85 parts       Montane ester wax (oxidation 12.0) 1 part       Oxidized rice wax (oxidized 20.5) 2 parts       Carbon black (Mitsubishi Carbon Co. # 44) 9 parts       Fluorine-containing sulfonate compound [Example- (2)] 1 part       Chromium-containing monoazo dye       (Orient Chemical Bontron S-34) Part 2 A mixture of the above composition was treated with Henschel Miki in the same manner as in Example 1.
After thoroughly stirring in a sir, roll mill at 80-110 ° C
After melting for about 40 minutes at room temperature and cooling to room temperature,
The kneaded product is pulverized and classified to obtain a toner having a particle size of 5 to 20 μm.
Got For 3.5 parts of this toner, 150 to 250
Iron oxide powder carrier of SH (TEFV made by Nippon Iron Powder Co., Ltd.) 9
6.5 parts were mixed with a ball mill to obtain a two-component developer.
It was Then, using this developer, continuous copying was performed in the same manner as in Example 1.
-When the test was conducted, the good result was obtained as in Example 1.
The fruit was obtained. The fixability of this product is shown in Table 2 below.
So good.

Example 18 A developer was obtained in the same manner as in Example 16 except that the fluorine-containing sulfonate compound [Example- (3)] was used. Next, when this developer was subjected to a continuous copy test in the same manner as in Example 16, good results were obtained as in Example 1.
The fixability of this product was good as shown in Table 2 below.

[0049]Example 19       Montane ester wax (oxidation 4.0) 2 parts       Oxidized rice wax (oxidized 11.5) 2 parts       Fluorine-containing sulfonate compound [Example- (7)] 1.5 parts A developer was obtained in the same manner as in Example 16 except that
It was Next, this developer was continuously copied in the same manner as in Example 16.
-As a result of the test, good results were obtained as in Example 1.
was gotten. The fixability of this product is shown in Table 2 below.
So good.

[0050]Example 20       Montane ester wax (oxidation 7.5) 3 parts       Oxidized rice wax (oxidized 13.5) 2.5 parts       Fluorine-containing sulfonate compound Example-13 2.0 parts A developer was obtained in the same manner as in Example 16 except that
It was Next, this developer was continuously copied in the same manner as in Example 16.
-As a result of the test, good results were obtained as in Example 1.
was gotten. The fixability of this product is shown in Table 2 below.
So good.

Comparative Example 12 Fluorine-containing sulfonate compound of Example 18 [Example-
A developer was prepared in the same manner as in Example 18 except that (3)] was not used, and a continuous copy test was conducted. As with Comparative Example 5, the offset resistance was satisfactory, but Q / M
A good image could not be obtained due to poor environmental change.

Comparative Example 13 A developer was prepared in the same manner as in Example 19 except that the fluorine-containing sulfonate compound example-10 of Example 19 was not used, and a continuous copy test was conducted. Although the offset resistance was a satisfactory result, a good image could not be obtained due to a poor Q / M environmental change.

The above results are shown in Table 2. Each evaluation method was as follows. [Offset Occurrence Temperature] The toner image transferred on the copy paper is fixed by repeating the operation of fixing the temperature of the roller with the Teflon-coated roller under the conditions of a roller nip width of 4 mm and a linear velocity of 250 mm / sec. The temperature at which dirt is generated is determined, and the lowest temperature at this time is the cold offset generation temperature, and the highest temperature is the hot offset. [Travel occurrence temperature] A so-called solid black original is used to transfer the toner onto almost the entire surface of the copy paper, and this is fixed in the same manner as in the case of measuring the offset occurrence temperature except that the heating temperature of the roller is sequentially decreased. Repeat the operation to obtain the temperature when the copy paper is wrapped around the roller. [Fixing lower limit temperature] Fixing is performed in the same manner as in the case of measuring the offset generation temperature, and the temperature when the toner fixing rate by the clock meter reaches 70% is obtained. [Environmental temperature] The amount of charge was measured under the conditions of 30 ° C. 90% and 10 ° C. 15%, and the fluctuation rate was obtained and evaluated. ○: Good △: Bad ×: Not practical [Comprehensive evaluation] ○: Good △: Poor ×: Not practical

[0054]

[Table 2- (1)]

[0055]

[Table 2- (2)]

[Effect] Since the dry toner of the present invention has the above-mentioned constitution, it has the following effects. (1) It has sufficient offset resistance and wrapping resistance. (2) Since low temperature fixing is possible, high speed fixing is possible. (3) Release agent Good dispersibility in binder resin, therefore less toner filming on photoreceptor or developing sleeve during development, no carrier contamination by spent toner, stable and high quality for a long period of time. Images can be formed.

Continued front page    (72) Inventor Yasutaka Iwamoto             1-3-3 Nakamagome, Ota-ku, Tokyo Stocks             Company Ricoh (72) Inventor Koji Yano             62-1 Kano-cho, Chuo-ku, Kobe-shi, Hyogo               Neos Co., Ltd. (72) Inventor Masafumi Takeshita             62-1 Kano-cho, Chuo-ku, Kobe-shi, Hyogo               Neos Co., Ltd.

Claims (3)

[Claims] 1. A toner for electrophotography comprising a binder resin, a colorant and a release agent as main components, wherein a polyester resin is used as the binder resin of the toner, and carnauba wax and the following general formula [as a release agent: An electrophotographic toner containing a fluorine-containing sulfonate compound represented by Formula 1]. [Chemical 1] 2. An electrophotographic toner comprising a binder resin, a colorant and a release agent as main components, wherein a polyester resin is used as the binder resin of the toner, and a montan wax and the following general formula: [1] An electrophotographic toner containing a fluorine-containing sulfonate compound represented by the above [1]. [Chemical 1] 3. A toner for electrophotography, which further contains oxidized rice wax as a release agent.