Fuji Xerox Co., Ltd.

Fujifilm Business Innovation Corp.

Shunsuke Nozaki

Hiroyoshi Okuno

Yuka Zenitani

Sakae Takeuchi

Yasuo Kadokura

Takeshi Iwanaga

Yoshifumi Iida

Hideaki Yoshikawa

Satoshi Inoue

Tomohito Nakajima

Yasuhisa Morooka

Yoshifumi Eri

Shinichiro Kawashima

Yasunobu Kashima

Koji Sasaki

Sakon Takahashi

Masashi Ikeda

Masahiro Takayama

Norihito Fukushima

Michio Take

Yuji Masuda

Soichiro Kitagawa

Junichi Tomonaga

Tatsuki Sano

Chika Hama

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

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 resin molded product contains a resin and hollow particles each having a shell layer containing a silsesquioxane represented by the following formula (RSiO)wherein R represents an alkyl group having 1 or more and 3 or less carbon atoms, a phenyl group, or a vinyl group, and n is an integer of 7 or more and 150 or less.

Resin molded product and resin composition

Provided is a silica titania composite aerogel particle including a base particle in which an element ratio Si/Ti of silicon to titanium is greater than 0 and equal to or lower than 6. A BET specific surface area of the silica titania composite particle is within a range of 200 m/g to 1200 m/g, and the silica titania composite particle has absorption at wavelengths of 450 nm and 750 nm.

Silica titania composite aerogel particle, photocatalyst forming composition, and photocatalyst

A silica-titania composite aerogel particle includes: a base particle including silicon and titanium whose element ratio Si/Ti is more than 0 and 6 or less; and a surface layer present on the base particle and including a metal compound having a metal atom and a hydrocarbon group. The silica-titania composite aerogel particle has absorption at wavelengths of 450 nm and 750 nm in a visible absorption spectrum, has a BET specific surface area in the range of 200 m/g to 1,200 m/g, and has a value A in the range of 0.03 to 0.3. The value A is calculated by formula: A=(peak intensity of C&#x2014;O bond+peak intensity of C&#x2550;O bond)/(peak intensity of C&#x2014;C bond+peak intensity of C&#x2550;C bond). The peak intensity is obtained from a C is XPS spectrum.

Silica-titania composite aerogel particle, photocatalyst-forming composition, and photocatalyst

A silica particle has a compression and aggregation degree of from 60% to 95% and a particle compression ratio of from 0.20 to 0.40.

Silica particle and method of preparing silica particle

A titanium oxide aerogel particle has absorption at wavelengths of 450 nm and 750 nm in a visible absorption spectrum, a surface to which a metal compound containing a metal atom and a hydrocarbon group is bonded via an oxygen atom, a BET specific surface area in a range of 120 m/g to 1,000 m/g, and a value A is in the range of 0.03 to 0.3. The value A is calculated by formula: A={(peak intensity of C&#x2014;O bond+peak intensity of C&#x2550;O bond)/(peak intensity of C&#x2014;C bond+peak intensity of C&#x2550;C bond)}. In the formula, the peak intensity is a value determined from a C 1s XPS spectrum.

Titanium oxide aerogel particle, photocatalyst-forming composition, and photocatalyst

A titanium oxide aerogel particle includes a metallic compound that has a metal atom and a hydrocarbon group, the metallic compound being bonded to a surface of the aerogel particle via an oxygen atom. The titanium oxide aerogel particle has a BET specific surface area of 120 m/g to 1000 m/g, and has absorption at wavelengths of 450 nm and 750 nm.

Titanium oxide aerogel particle, photocatalyst forming composition, and photocatalyst

A silica composite particle includes a silica particle and a compound in which a metal atom selected from the group consisting of Ti, Al, Zr, V, and Mg bonds to an organic group through oxygen, the silica particle being surface-treated with the compound. A coverage of a surface of the silica composite particle with the metal atom is 0.01 at % or more and 30 at % or less. When a binding energy peak of O1s in an oxide of the metal atom is assumed to be MO1s, a binding energy peak of O1s in SiOis assumed to be SO1s, and a binding energy peak of O1s in the silica composite particle is assumed to be MSO1s, the binding energy peaks being detected by X-ray photoelectron spectroscopy, the formula 0.000452&#xd7;X&#x2212;0.059117&#xd7;X+SO1s&#x3c;MSOs&#x2264;(SO1s&#x2212;MO1s)/100&#xd7;X+SO1s is satisfied.

Silica composite particle and method for producing the same

A resin particle composition includes resin particles, inorganic particles surface-treated with oil, and silica particles having a compression aggregation degree of 60% to 95% and a particle compression ratio of 0.20 to 0.40.

Resin particle composition

A resin particle composition includes resin particles, polishing agent particles having an average circle-equivalent diameter of 0.1 &#x3bc;m to 3.0 &#x3bc;m, and silica particles having a compression aggregation degree of 60% to 95% and a particle compression ratio of 0.20 to 0.40.

An electrostatic image developing toner contains: toner particles, first silica particles having an average equivalent circle diameter of 10 nm to 120 nm and second silica particles having a compressive agglomeration degree of 60% to 95%, a particle compression ratio of 0.20 to 0.40 and an average equivalent circle diameter being greater than the average equivalent circle diameter of the first silica particles.

Electrostatic image developer and toner, electrostatic image developer and toner cartridge

A toner for electrostatic image development includes toner particles; and an external additive containing silica particles and polytetrafluorethylene particles, the silica particles having a compression-aggregation degree of 60% or more and 95% or less and a particle compression ratio of 0.20 or more and 0.40 or less.

Toner for electrostatic image development, electrostatic image developer, toner cartridge, process cartridge, image forming apparatus, and image forming method

An electrostatic charge image developing toner includes toner particles containing a binder resin, and an external additive including silica particles having a compression aggregation degree is from 60% to 95% and a particle compression ratio is from 0.20 to 0.40, and resin particles containing a polymer obtained by polymerizing a (meth)acrylic acid ester monomer.

Electrostatic charge image developing toner, electrostatic charge image developer, and toner cartridge

An electrostatic charge image developing toner includes toner particles and an external additive that includes silica particles having a compression aggregation degree of 60% to 95% and a particle compression ratio of 0.20 to 0.40 and fatty acid metal salt particles.

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Kanagawa, Japan

Shunsuke Nozaki