Fuji Xerox Co., Ltd.

Fujifilm Business Innovation Corp.

Yuka Zenitani

Sakae Takeuchi

Hiroyoshi Okuno

Shunsuke Nozaki

Takeshi Iwanaga

Yoshifumi Eri

Yasuo Kadokura

Yoshifumi Iida

Hideaki Yoshikawa

Satoshi Inoue

Tomohito Nakajima

Yasuhisa Morooka

Koji Sasaki

Shinichiro Kawashima

Yasunobu Kashima

Mai Mochida

Takahiro Mizuguchi

Sakon Takahashi

Hiroshi Kamada

Masashi Ikeda

Moegi Iguchi

Yasuaki Hashimoto

Takeshi Tanabe

Hiroaki Saijo

Masaaki Usami

Yuta Saeki

Chika Hama

Shimpei Takagi

Masahiro Takayama

Takashi Hasegawa

Daisuke Tomita

Yasuhiro Kusumoto

Satomi Kashiwagi

Yuji Masuda

Hajime Sugahara

Sachiko Nishioka

An electrostatic charge image developing toner has toner particles and silica particles that are added to an exterior of the toner particles, contain a nitrogen element-containing compound, have a ratio C/D of 0.10 or more and 0.75 or less where C represents an integral value of signals observed in a range of chemical shift of −50 ppm or more and −75 ppm or less in aSi solid-state nuclear magnetic resonance (NMR) spectrum obtained by a cross-polarization/magic angle spinning (CP/MAS) method and D represents an integral value of signals observed in a range of chemical shift of −90 ppm or more and −120 ppm or less in the same spectrum, have an extraction amount X of the nitrogen element-containing compound by a mixed solution of ammonia/methanol of 0.1% by mass or more, and satisfy Expression: Y/X<0.3 where X represents an extraction amount of the nitrogen element-containing compound by a mixed solution of ammonia/methanol and Y represents an extraction amount of the nitrogen element-containing compound by water.

Electrostatic charge image developing toner, electrostatic charge image developer, toner cartridge, process cartridge, image forming apparatus, and image forming method

Silica particles includes a nitrogen-containing compound. The ratio of the integral C of a signal observed at a chemical shift of −50 ppm or more and −75 ppm or less in aSi solid-state nuclei magnetic resonance (NMR) spectrum of the silica particles, theSi solid-state NMR spectrum being obtained by cross polarization/magic angle spinning (CP/MAS), to the integral D of a signal observed at a chemical shift of −90 ppm or more and −120 ppm or less in theSi solid-state NMR spectrum, that is, C/D, is 0.10 or more and 0.75 or less. The amount X of the nitrogen-containing compound extracted from the silica particles with a mixed solution of ammonia and methanol is 0.1% by mass or more. The amount X of the nitrogen-containing compound extracted and the amount Y of the nitrogen-containing compound extracted from the silica particles with water satisfy Y/X<0.3.

Silica particles and method for producing the same

A silica particle includes: a quaternary ammonium salt, in which the following expressions are satisfied, 0.90≤F/F≤1.10, and 5≤F/F≤20, in which Frepresents a maximum frequency value of a pore diameter of 2 nm or less in the silica particles before washing, which is obtained from a pore distribution curve in a nitrogen gas adsorption method, Frepresents a maximum frequency value of the pore diameter of 2 nm or less in the silica particles after washing, which is obtained from the pore distribution curve in the nitrogen gas adsorption method, and Frepresents a maximum frequency value of the pore diameter of 2 nm or less in the silica particles before washing and after sintering at 600° C., which is obtained from the pore distribution curve in the nitrogen gas adsorption method.

Silica particle and method for producing the same

An electrostatic charge image developing toner contains toner particles and silica particles that are added to an exterior of the toner particles and contain a nitrogen element-containing compound containing a molybdenum element, in which in the silica particles, a ratio (Mo/Si) of Net intensity of the molybdenum element to Net intensity of a silicon element measured by X-ray fluorescence analysis is 0.035 or more and 0.35 or less.

Silica particles contain a nitrogen element-containing compound containing a molybdenum element, in which a ratio (Mo/Si) of Net intensity of the molybdenum element to Net intensity of a silicon element measured by X-ray fluorescence analysis is 0.035 or more and 0.35 or less.

Silica particles comprising nitrogen element-containing compound containing molybdenum element

Silica particles have silica base particles, a structure that covers at least a part of a surface of the silica base particles and is configured with a reaction product of a trifunctional silane coupling agent, and a nitrogen element-containing compound, in which a content of the nitrogen element-containing compound with respect to the silica particles is 0.005% by mass or more and 0.50% by mass or less in terms of N atoms, and the silica particles have a degree of hydrophobicity of 10% or more and 60% or less and a volume resistivity of 1×10Ω·cm or more and 1×10Ω·cm or less.

Silica particles and manufacturing method thereof

Silica particles include a nitrogen-containing compound. When the volumes of pores having a diameter of 1 nm or more and 50 nm or less, the volumes being determined from a pore size distribution curve of the silica particles before and after the silica particles are baked at 350° C., the pore size distribution curve being obtained by nitrogen gas adsorption, are defined as A and B, respectively, B/A is 1.2 or more and 5 or less and B is 0.2 cm/g or more and 3 cm/g or less.

A pressure sensitive adhesive particle includes a pressure sensitive adhesive base particle that contains a styrene resin containing styrene and a vinyl monomer other than styrene as polymerization components, and a (meth)acrylate resin containing at least two (meth)acrylates as polymerization components, in which a mass ratio of the (meth)acrylates relative to a total of polymerization components of the (meth)acrylate resin is 90 mass % or more; and an external additive. The pressure sensitive adhesive particle has a surface having an arithmetic average roughness Ra within a range of 0.005 μm to 0.100 μm. The pressure sensitive adhesive particle has at least two glass transition temperatures, and the difference between the lowest glass transition temperature and the highest glass transition temperature among the glass transition temperatures of the pressure sensitive adhesive particle is 30° C. or more.

Pressure sensitive adhesive particles, method for producing printed material, and printed material

Resin particles include resin base particles and silica particles on surfaces of the resin base particles. The silica particles contain a quaternary ammonium salt and have hydrophobized surfaces. A difference (detection temperature A&#x2212;detection temperature B) between a detection temperature A and a detection temperature B is more than 50&#xb0; C., where the detection temperature A is a detection temperature from a pyrolysis product of the quaternary ammonium salt determined by pyrolysis mass spectrometry of the resin particles before cleaning, and the detection temperature B is a detection temperature from the pyrolysis product of the quaternary ammonium salt determined by pyrolysis mass spectrometry of the resin particles after cleaning.

Resin particles and method for manufacturing resin particles

A method for producing a silica composite particle including a silica particle and at least one compound in which an aluminum atom bonds to an organic group through oxygen. The method includes: (i) providing a silica particle dispersion liquid having a silica particle content of about 20 mass % or more; (ii) mixing and reacting a compound represented by formula (S1) and the silica particle dispersion liquid to obtain a slurry; (iii) providing the at least one compound; and (iv) then mixing and reacting the slurry with the at least one compound to form the silica composite particle.

Method for producing silica composite particle

An organic substance-attached porous inorganic oxide particle including porous inorganic oxide particle and an organic substance attached to the surface of the porous inorganic oxide particle. The organic substance-attached porous inorganic oxide particle satisfies a formula below()/2&#x3e;1where Cf represents the amount of carbon (atom %) measured by subjecting the surface of the particle to X-ray photoelectron spectroscopy (XPS) after the particle is washed, and Ce represents the amount of carbon (atom %) measured by subjecting the surface of the particle to X-ray photoelectron spectroscopy (XPS) after two-minute surface etching of the particle.

Organic substance-attached porous inorganic oxide particle

A silica-titania composite has a BET specific surface area, as determined by BET analysis of a water vapor adsorption isotherm, in the range of 250 m/g to 500 m/g and a contact angle with water of 100&#xb0; or greater. In the water vapor adsorption isotherm, an adsorbed amount at relative pressure P/P=0.1 is in a range of 65 cm/g to 120 cm/g, an adsorbed amount at relative pressure P/P=0.5 is in a range of 150 cm/g to 300 cm/g, and an adsorbed amount at relative pressure P/P=0.9 is in a range of 350 cm/g to 500 cm/g.

Silica-titania composite and structure

A plant protection agent includes a photocatalyst particle containing a titanium oxide compound. The surface of the photocatalyst particle is modified with a metal compound that includes a metal atom and a hydrocarbon group. The photocatalyst particle has absorption at a wavelength of 550 nm.

Plant protection agent

A filter includes a filter medium having an average pore size of 1 to 5 mm, and photocatalyst particles deposited on the filter medium. The photocatalyst particle contains a titanium compound particle and a metal compound bonded to the surface of the titanium compound particle with an oxygen atom. The metal compound contains a metal atom and a hydrocarbon group. The titanium compound particle has absorption at wavelengths of 450 nm and 750 nm in the visible absorption spectrum of the titanium compound particle.

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Kanagawa, Japan

Yuka Zenitani