Kurita Water Industries Ltd.

Canon Kabushiki Kaisha

Ayako Sekikawa

Hideo Sugi

Takaaki Kaya

Kenji Tahara

Shigeto Tamura

Ryoichi Takahashi

Atsushi Tani

Makoto Kambayashi

Ryoichi Fujita

Fumio Toda

Keisuke Mizuno

Eiichirou Kondou

Isao Joukou

A magenta toner characterized by satisfying, in DSC measurement, 40.0&#x2266;Tg(0.5)&#x2266;60.0 and 2.0&#x2266;Tg(4.0)&#x2212;Tg(0.5)&#x2266;10.0, wherein when preparing a solution of which the magenta toner is dissolved in ethyl acetate, and defined the concentration of the thereof as C(mg/ml), and the light absorbance thereof at a wavelength of 538 nm as A(ethyl acetate), the ratio of A(ethyl acetate)to Csatisfies the formula, A(ethyl acetate)/C&#x3c;0.15, and, when preparing a solution of which the magenta toner is dissolved in chloroform, and defined the concentration of the thereof as C(mg/ml), and the light absorbance thereof at a wavelength of 538 nm as A(chloroform), the ratio of A(chloroform)to Csatisfies the formula, 2.00&#x3c;A(chloroform)/C&#x3c;6.55.

Magenta toner

A yellow toner is provided which can form high-quality images and has high offset resistance and excellent charging performance while being a capsule-type toner having excellent low-temperature fixability. The yellow toner satisfies, in DSC measurement, 40.0&#x2266;Tg(0.5)&#x2266;60.0 and 2.0&#x2266;Tg(4.0)&#x2212;Tg(0.5)&#x2266;10.0, wherein when the concentration of the yellow toner in an ethyl acetate dispersion is C(mg/ml) and the light absorbance at a wavelength of 422 nm of the dispersion is A(ethyl acetate), the relationship between Cand A(ethyl acetate)satisfies A(ethyl acetate)/C&#x3c;0.45, and when the concentration of the yellow toner in a chloroform solution is C(mg/ml) and the light absorbance at a wavelength of 422 nm of the solution is A(chloroform), the relationship between Cand A(chloroform)satisfies 6.00&#x3c;A(chloroform)/C&#x3c;14.4.

Yellow toner

A black toner has a toner particle including at least a resin (a) having a polyester as a main component, carbon black, and a wax, and a fine inorganic particle. When the Tgs of the black toner measured by DSC at temperature rise rate of 0.5&#xb0; C./min and 4.0&#xb0; C./min are defined as Tg(0.5) and Tg(4.0) respectively, Tg(0.5) is 35.0 to 60.0&#xb0; C. and the difference between Tg(4.0) and Tg(0.5) is 2.0 to 10.0&#xb0; C. When preparing a solution of which the black toner is dissolved in ethyl acetate and defined the concentration thereof as Cb1 (mg/mL) and the light absorbance thereof at 600 nm wavelength as A600, A600/Cb1 is less than 0.15. When preparing a solution of which the black toner is dissolved in chloroform and defined the concentration thereof as Cb2 (mg/mL) and the light absorbance thereof at 600 nm wavelength as A600, A600/Cb2 is 2.00 to 6.55.

Black toner

Provided is a cyan toner which, while being a capsule-type toner having excellent low-temperature fixability, has excellent offset resistance and charging performance and can obtain high-quality images. A cyan toner having at least a resin (a) having a polyester as a main component, a colorant, and a wax, in which glass transition temperatures (&#xb0; C.) Tg(0.5) and Tg(4.0) obtained at a rate of temperature increase of 0.5&#xb0; C./min or 4.0&#xb0; C./min satisfy 40.0&#x2266;Tg(0.5)&#x2266;60.0 and 2.0&#x2266;Tg(4.0)&#x2212;Tg(0.5)&#x2266;10.0, and wherein, when the concentration of the cyan toner in an ethyl acetate dispersion is Cc(mg/ml), and the light absorbance at a wavelength of 712 nm of the dispersion is A(ethyl acetate)712, A(ethyl acetate)712/Cc&#x3c;0.15 is satisfied, and wherein, when the concentration of the cyan toner in a chloroform solution is Cc(mg/ml), and the light absorbance at a wavelength of 712 nm of the solution is A(chloroform)712, 2.00&#x3c;A(chloroform)712/Cc&#x3c;8.15 is satisfied.

Cyan toner

An object of the present invention is to provide a spherical toner that has a sharp particle size distribution and a small particle diameter. This is a capsule-type toner that exhibits an excellent low-temperature fixability, while at the same time having a high offset resistance and excellent charging properties and having the ability to provide a high-quality image in which the characters, lines, and dots are precisely defined. The object is achieved by a toner comprising a toner particle that comprises at least (a) resin having polyester as the main component, colorant, wax, and (b) urethane resin, wherein the hydroxyl value per specific surface area of the toner particle is fall into the specific range, and wherein a Tg(0.5) and a Tg(4.0)-Tg(0.5) of the toner fall into specific range.

Toner

An antimicrobial composition comprises a clathrate compound containing a water-soluble microbicide, and a dispersion medium. For example, the composition may comprise of a clathrate compound containing a water-soluble microbicide and having a particle size of 200 mesh at maximum, said clathrate compound being formed of 5-chloro-2-methyl-4-isothiazoline-3-one and at least one polymolecular host compound selected from the group consisting of 1, 1-di (2,4-dimethylphenyl)-2-propyne-1-ol; 1,1,6,6-tetra(2,4-dimethylphenyl)-2,4-hexadiyne-1,6-diol; 1,1-bis(4-hydroxyphenyl)cyclohexane; N,N,N',N'-tetra(cyclohexyl)-[1,1'biphenyl]-2,2'-dicarboxyamide; 2,2'-methylenebis(4-chlorophenol), deoxycholic acid; and 2,5-di-tert-butylhydroquinone and a dispersion medium.

Antimicrobial dispersion composition

A clathrate compound comprising a water-soluble microbicide and at least one of (a) a bisphenol compound represented by formula (I) and (b) deoxycholic acid represented by formula (II):

Clathrate compound

A clathrate compound is produced if a powdery host compound which reacts with a microbicide to form the clathrate compound is added into an aqueous solution of the microbicide. If the microbicide is separated from the clathrate compound, a microbicide of high purity can be obtained.

Method of producing a clathrate compound

Method of purifying a microbicide

A sustained release aromatic comprises a clathrate compound composed of a perfume and a polyphenyl compound and gives out fragrance slowly but steadily over a long period of time. It is produced by a process comprising melting under heat a perfume which is a solid at an ordinary room temperature, and adding a polyphenyl compound to the molten perfume. Alternatively, a perfume which is a liquid at an ordinary room temperature is mixed with a polyphenyl compound so that they may react with each other, and a solid reaction product is separated from their mixture.

Sustained release aromatic

Diphenic acid bis(dicyclohexylamide) represented by the following formula: ##STR1## A process for producing diphenic acid bis(dicyclohexylamide) represented by the above formula, which comprises dimerizing a diazonium salt of o-aminobenzoic acid in the presence of a reducing agent, followed by acidification to give 2,6'-dicarboxylbiphenyl; converting this dicarboxylic acid to 2,6'-dichloroformylbiphenyl by chlorination; and reacting this acid chloride with dicyclohexylamine. Sustained release antimicrobial compositions comprising a clathrate compound consisting of a microbial agent and diphenic acid bis(dicyclohexylamide) represented by the above formula.

Diphenic acid bis(dicyclohexylamide) for clothrate compound, process for

A sustained release antimicrobial agent comprises a clathrate compound composed of a water-soluble microbicide and at least one of the compounds shown at (I) to (V) below:

Sustained release antimicrobial agents and method of fouling control

A wet spray booth treating agent, characterized by containing melamine-aldehyde acid colloid solution and a method for the treatment of a wet spray booth, characterized by the use of the aforementioned treating agent.

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Tokyo, Japan

Ayako Sekikawa