JPS62160464A - Eletrophotographic dry toner - Google Patents

Abstract

PURPOSE:To obtain a toner exhaling fragrance and to obtain superior image quality and stability by incorporating a specified compound in a dry toner. CONSTITUTION:The dry toner contains a compound selected from benzyl benzoate, cinnamic alcohol, cyclopentadecanolide, diphenyl ether, tonalid, beta-naphthyl alkyl ether, heliotropin, methyl N-methylanthranilate, l-carbone, undecylene aldehyde, eugenol, isoamyl isovalerate, anisaldehyde, geranyl acetate, cinnamyl acetate, terpinyl acetate, dimethylbenzylcarbinyl acetate, p-t-butyl-alpha- methylhydrocinnamic aldehyde, citral, and cyclamen aldehyde, thus permitting resin odor to be eliminated, the particular fragrance of the perfume and a stable image to be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a dry toner for electrophotography, and more particularly, to a dry toner for electrophotography, which does not generate unpleasant odor during copying.

The present invention relates to an electrophotographic dry toner useful as a one-component or two-component developer that provides excellent image quality stability.

[Prior art]

In general, development methods in electrophotography are roughly divided into those using dry developers and those using wet developers.The former uses two-component dry developers that use a combination of toner and carrier, It is classified as a one-component dry developer consisting only of toner.

However, in the past, when copying using dry toner, the density and background density of the copied image fluctuated greatly due to changes in the environment such as temperature and humidity, making it impossible to obtain a stable image. When dry toner is mixed with carrier (in the case of two-component dry developer)
There are many phenomena in which the chargeability changes during repeated copying, and the image quality changes accordingly.

In addition, ozone odor emitted from the vicinity of the corona charger and toner odor emitted from the fixing section where the toner is melted and fixed (this is mainly caused by soil removal caused by melted resins such as polystyrene and acrylic ester polymer that make up the toner). Although it does not pose a health risk, it is considered a problem because it causes discomfort.

For wet toners, attempts have been made to add fragrance to the carrier liquid to provide aromatic properties, but for dry toners, aromatic toners of satisfactory quality in terms of image quality and stability have not yet been obtained. The reality is that there is not.

〔the purpose〕

The present invention provides a dry toner with a unique aroma that has excellent image quality and can provide images of stable quality even under changes in temperature and humidity.

[Oval]

The electrophotographic dry toner of the present invention contains benzyl benzoate, cinnamic alcohol, cyclopentadecanolide, diphenyl ether, tonalide, β-naphthyl alkyl ether, heliotropine, methyl N-methylanthranilate, and Q-menthol.

Isoamyl salicylate, geraniol, Q-carvone,
Undecylenaldehyde, eugenol, isoamyl isovalerate, anisaldehyde.

Geranyl acetate, cinnamyl acetate, tervinyl acetate, dimethylbenzylcarbinyl acetate, pt-butyl-α-
It is characterized by containing a compound selected from methylhydrocinnamic aldehyde, citral and cyclamenaldehyde.

Incidentally, the present inventors have found that by incorporating the above-mentioned specific compounds into a dry toner, the unpleasant odor emitted from conventional dry toners or copying machines can be suppressed, and the unique aroma of each compound can be emitted. It was confirmed that excellent image quality and stability could be obtained. The present invention was completed based on this knowledge.

The present invention will be explained in more detail below. The young substances used in the present invention are the compounds described above, and these young substances can be directly applied (added) to the conventional toner manufacturing method.
can. That is, a method of heat kneading together with a binder resin and a colorant can be used. Even if these young substances are used as one type, two
More than one species may be used together.

Here, the aroma of the young substance is as follows.

It is.

(1) Benzyl benzoate (almost odorless, somewhat balsam-like) (2) Cinnamyl alcohol (
hyacinth) (3) cyclopentadecanolide (4) diphenyl ether (geranium,
(rose) (5) Tonalide (fruit) (6) β-naphthyl alkyl ether (fruit)
R ◎◎′ (Rnee C)l,, -C,11, or -C,O,)(7
) Heliotropine-piperonal (heliotrope flower) (8) Methyl N-methylanthranilate (fruit)
(9) Q-Menthol (10) Isoamyl salicylate (11) Geraniol (12) Q-Carvone (Spearmint oil) (13) Undecylenaldehyde (
Rose-like, Citrus-like) (14) Eugenol (Choji-like) (15) Isoamyl invalerate (Fruit-like) (16) Anisaldehyde (Yamasuko-like) (17) Geranyl acetate (
(rose scent) (18) Cinnamyl acetate (flower scent)
(19) Tervinyl acetate (lavender flower) (2) dimethylbenzylcarbinyl acetate (lilac flower, lily flower) (21) pt-butyl-α-methylhydrocinnamic aldehyde (lily flower flower) (22 ) Citral (like lemon) (23) Cyclamen aldehyde (like cyclamen) As the binder resin used in the toner of the present invention, many conventionally used resins can be used, including the following. Namely, polystyrene homopolymer, acrylic ester polymer, copolymer of styrene and acrylic ester, vinyl chloride polymer, vinyl acetate polymer, polyethylene, polypropylene, polyester resin,
Examples include polycarbonate resin, epoxy resin, phenol resin, maleic acid resin, alkyd resin, and urethane resin.

Colorants include carbon black, nigrosine dye,
Aniline blue, calco oil blue, chrome yellow, phthalocyanine pigments.

Examples include rhodamine pigment, benzidine pigment, and malachite green.

The amount of the compound of the present invention (fragrance substance) added to the toner is 0.01 to 10 parts by weight, preferably 0.5 to 5 parts by weight, based on 100 parts by weight of the binder resin.

Next, Examples and Comparative Examples will be shown, in which all parts are by weight.

Example 1 Styrene-butyl methacrylate copolymer 10
0 parts (Hymer SBM700 manufactured by Mitsubishi Kasei Corporation) Carbon black (#44 manufactured by Mitsubishi Kasei Corporation) 10 parts Chromium-containing azo dye 1 part (Spirone Black B manufactured by Hodogaya Chemical Co., Ltd.) 1) Benzyl benzoate 1 part Prescription mixture The mixture was heat-kneaded in a two-roll mill, and then ground in a jet grinder to obtain toner particles of 5 to 20 microns.

Five parts of these toner particles were added to Nippon Tetsuko Co., Ltd.'s iron powder carrier (
A dry developer was prepared by mixing with 95 parts of TEFV 200/300).

This developer was applied to an electrophotographic copying machine (Ricoh FT4060).
) and performed an image test, and a good image with no background stains was obtained. During copying, there was no ozone odor or toner odor from the fixing section, as was the case with conventional printers, but there was a balsam-like scent.

When the degree of odor or aroma was investigated through a sensory test, 20 monitors, 918 people, found that 1. Unpleasant odor 2. I don't notice any particular scent 3. A rating of 3 was given on a 3-level evaluation of favorable aroma. The other monitors also answered 2, and no one answered 1.

Long-term running tests of the above developer (continuous copying of 100,000 copies to see changes in images due to continuous copying) and environmental tests with varying temperature and humidity (10°C, 15% RH to see stability against environmental changes) Under low humidity and low temperature environment and 30℃,
It was confirmed that stable images were always obtained even when copying in a 90% high temperature environment.

Also, instead of benzyl benzoate, cinnamic alcohol, cyclopentadecanolide, diphenyl ether, tonalide,
β-naphthyl alkyl ether, heliotropine, methyl N-methylanthranilate, a-menthol, isoamyl salicylate, geraniol, Q-carvone, undecylenaldehyde, eugenol, isoamyl isovalerate, anisaldehyde, geranyl acetate, cinnamyl acetate,
Tervinyl acetate, dimethylbenzylcarbinyl acetate, p
When a dry developer was prepared in exactly the same manner except that -t-butyl-α-methylhydrocinnamic aldehyde, citral or cyclamen aldehyde was used and subjected to development, almost the same good results were obtained. .

Comparative Example 1 Toner particles were produced and a developer was prepared in exactly the same manner as in Example 1 except that benzyl benzoate was omitted, and the same tests were conducted.

As a result, in the sensory test of the degree of odor or aroma, 20
All of the respondents answered 1 as an unpleasant odor. Although the developer exhibited a sufficient toner band 'as,i' immediately after production, the stability of the image was not observed due to severe fluctuations due to environmental changes and continuous copying.

Example 2 Toner particles of 5 to 20 μm were produced in exactly the same manner as in Example 1, except that the recipe for producing toner particles was as follows, a developer was prepared, and the same tests were conducted.

Carbon black (MAloo manufactured by Mitsubishi Kasei Corporation)
10 parts Benzyl benzoate
When a test similar to that in Example 1 was conducted using a portion of this developer, stable images were always obtained.

No unpleasant odor was generated during copying, and a pleasant aroma was produced.

Also, instead of benzyl benzoate, cinnamic alcohol, cyclopentadecanolide, diphenyl ether, tonalide,
β-naphthyl alkyl ether, heliotropine, methyl N-methylanthranilate, Q-menthol, isoamyl salicylate, geraniol, Q-carvone, undecylenaldehyde, eugenol, isoamyl isovalerate, anisaldehyde, geranyl acetate.

A dry developer was prepared in exactly the same manner except that cinnamyl acetate, tervinyl acetate, dimethylbenzylcarbinyl acetate, pt-butyl-α-methylhydrocinnamic aldehyde, citral, or cyclamenaldehyde was used and subjected to development. , similar good results were obtained.

Example 3 Toner particles of 5 to 20μ were made in the same manner as in Example 1, except that the recipe for producing toner particles was as follows.
The image side was prepared and a similar test was conducted.

Unsaturated polyester resin 100
Part (382A manufactured by Kao Corporation) Benzyl benzoate 2 parts When the same test as in Example 1 was conducted using this developer, stable images were always obtained, no unpleasant odor was generated during copying, and there was a pleasant aroma. Brought to you.

Also, instead of benzyl benzoate, cinnamic alcohol, cyclopentadecanolide, diphenyl ether, tonalide,
β-naphthyl alkyl ether, heliotropine, methyl N-methylanthranilate, a-menthol, isoamyl salicylate, geraniol, Q-carvone, undecylenaldehyde, eugenol, isoamyl isovalerate, anisaldehyde, geranyl acetate, cinnamyl acetate,
Tervinyl acetate, dimethylbenzylcarbinyl acetate, p
When a dry developer was prepared in exactly the same manner except that -t-butyl-α-methylhydrocinnamic aldehyde, citral or cyclamen aldehyde was used and subjected to development, almost the same good results were obtained. .

Example 4 Styrene-butyl methacrylate copolymer 10
After heat-kneading a mixture of a formulation consisting of 0 parts (Sanyo Chemical Co., Ltd. @ S8M700), 2 parts of Nigrosine dye (Nigrosine Base EX, manufactured by Orient Chemical Co., Ltd.) and 10 parts of carbon black (Dia Black SH, manufactured by Mitsubishi Chemical Corporation) in a two-roll mill. The particles were pulverized using a jet pulverizer to obtain toner particles of 5 to 20 μm.

Subsequently, a solution for a young number was prepared by dissolving 5 g of benzyl benzoate in 1 Ω of ethanol, and after pressurizing the solution, the toner particles were filtered off and dried.

Five parts of the toner particles of the present invention thus obtained were mixed with 95 parts of iron powder carrier (TEFV 200/300) manufactured by Nippon Tetsuko Co., Ltd. to prepare a dry developer. ``When the same tests as in Example 1 were conducted using this developer, stable images were always obtained, and no unpleasant odor was generated during copying, resulting in a pleasant aroma.

Also, instead of benzyl benzoate, cinnamic alcohol, cyclopentadecanolide, diphenyl ether, tonalide,
β-naphthyl alkyl ether, heliotropine, methyl N-methylanthranilate, Q-men1-l, isoamyl salicylate, geraniol, carvone, undecylenaldehyde, eugenol, isoamyl isovalerate, anisaldehyde, geranyl acetate.

A dry developer was prepared in exactly the same manner except that cinnamyl acetate, tervinyl acetate, dimethylbenzylcarbinyl acetate, pt-butyl-α-methylhydrocinnamic aldehyde, citral, or cyclamenaldehyde was used and subjected to development. 6 [Effect] As described above, according to the dry toner containing the specific aged odor substance according to the present invention, the resin odor can be eliminated and the odor peculiar to the aged odor substance can be eliminated. Not only can you obtain a pleasant aroma, but you can also obtain stable images at all times, even under various environments.

Claims (1)

[Claims] 1. Benzyl benzoate, cinnamic alcohol, cyclopentadecanolide, diphenyl ether, tonalide, β-naphthyl alkyl ether, heliotropine, methyl N-methylanthranilate, l-menthol, isoamyl salicylate, geraniol, l-carvone, undecylenaldehyde, Contains a compound selected from eugenol, isoamyl isovalerate, anisaldehyde, geranyl acetate, cinnamyl acetate, tervinyl acetate, dimethylbenzylcarbinyl acetate, pt-butyl-α-methylhydrocinnamic aldehyde, citral and cyclamenaldehyde A dry toner for electrophotography, which is characterized by: