Dic Corporation

Fumihiko Maekawa

Kazuo Itoya

Jian-Jun Yuan

Masamichi Hayashi

Takayuki Kanematsu

Hiroshi Kinoshita

Yoshiyuki Sano

Shingo Takada

Hironobu Oki

Atsushi Oshio

Masaki Iida

Yukie Suwa

Kosaku Nishiyama

Narihito Sekiguchi

Yasuyo Sakamoto

Flaky alumina particles including mullite in a surface layer of the flaky alumina particles. A method for producing flaky alumina particles including forming a mixture by mixing together an aluminum compound that contains elemental aluminum, a molybdenum compound that contains elemental molybdenum, and silicon or a silicon compound that contains elemental silicon, the aluminum compound being in an amount greater than or equal to 50 mass %, calculated as AlO, the molybdenum compound being in an amount less than or equal to 40 mass %, calculated as MoO, the silicon or the silicon compound being in an amount of 0.5 mass % or greater and less than 10 mass %, calculated as SiO, relative to a total mass of the flaky alumina particles taken as 100 mass %; and firing the mixture.

Flaky alumina particles and method for producing flaky alumina particles

The present invention provides alumina particles having a fixed card-house structure formed of three or more flat plate-like alumina particles and having an average particle diameter of 3 to 1000 &#x3bc;m. Also, there is provided alumina particles having an average particle diameter of 3 to 1000 &#x3bc;m and having a fixed card-house structure in which the three or more flat plate-like alumina are aggregated to be crossed each other at two or more plurality of positions, and the plane directions of the flat plates crossed each other are in a state of disordered arrangement.

Alumina particle

Provided is a surface-treated spinel particle (B) including a spinel particle (A) including a magnesium atom, an aluminum atom, and an oxygen atom and a surface treatment layer disposed at least a portion of the surface of the spinel particle (A). The surface treatment layer includes a surface-treating agent including an organic compound or a cured product of the surface-treating agent. The spinel particle (A) further includes molybdenum. The crystallite diameter of the [111] plane of the spinel particle (A) is 220 nm or more. Also provided are a method for producing the surface-treated spinel particle (B), a resin composition including the surface-treated spinel particle (B), and a molded article.

Surface-treated spinel particles, method for producing the same, resin composition, and molded article

An offset printing ink in which a modified pigment (D) is dispersed in a vehicle as a colorant, the modified pigment (D) contains a polymer (P) on the surface thereof, and the polymer (P) is obtained by polymerizing a resin or fat (B) which has a polymerizable unsaturated group, and is soluble in a nonaqueous solvent, and at least one of polymerizable unsaturated monomers (C) which are soluble in a nonaqueous solvent and insoluble or poorly-soluble after polymerization, and specifically, the resin or fat (B) is selected from the group consisting of acrylic resins having a polymerizable unsaturated group, alkyd resins which are soluble in the nonaqueous solvent, natural resin-modified phenol resins, and fats.

Offset printing ink

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Sakura, Japan

Fumihiko Maekawa