Toda Kogyo Corporation

Agency of Industrial Science and Technology

Minoru Ohsugi

Kazuyuki Hayashi

Hiroko Morii

Norio Sugita

Keisuke Iwasaki

Yasuyuki Tanaka

Shigeru Takaragi

Mineko Sakoda

Masaaki Maekawa

Yasuhiko Fujii

Koso Aoki

Yasushi Nishio

Yosuke Koyama

Nanao Horiishi

Masao Kato

Mamoru Kamigaki

Hachiro Nakanishi

Masaru Isoai

Naruo Yokoyama

Hiro Matsuda

Kazushi Takama

Suminori Tanaka

Shuji Okada

Toshiharu Harada

Masaharu Nishihara

Satoru Saito

Takahiro Araki

Takayoshi Ohara

Yasuhiko Fuji

The present invention relates to ferrite particles for bonded magnet, having a volume-average particle diameter of 2.1 to 2.7 &#x3bc;m and a particle diameter &#xd7;90 of 4.3 to 5.4 &#x3bc;m wherein the &#xd7;90 represents a particle diameter at which a cumulative percentage of particles under sieve (undersize particles) based on a volume thereof is 90%, when determined from a particle size distribution thereof measured by using a laser diffraction type particle size distribution measuring apparatus.

Ferrite particles for bonded magnet, resin composition for bonded magnet and molded products using the same

The present invention relates to ferrite particles for bonded magnet, having a volume-average particle diameter of 2.1 to 2.7 &#x3bc;m and a particle diameter x90 of 4.3 to 5.4 &#x3bc;m wherein the x90 represents a particle diameter at which a cumulative percentage of particles under sieve (undersize particles) based on a volume thereof is 90%, when determined from a particle size distribution thereof measured by using a laser diffraction type particle size distribution measuring apparatus.

Resin composition for bonded magnet and bonded magnet using the same

Iron oxide particles

The disclosure describes a non-magnetic undercoating layer for a magnetic recording medium, coated on the surface of a non-magnetic substrate comprising:

Non-magnetic coated particles having a defined parameter .alpha. of not

Non-magnetic undercoating layer for magnetic recording medium, magnetic

The disclosure describes a method of incinerating combustible wastes comprising the step of incinerating said combustible wastes in the presence of a calcium compound and particles selected from the group consisting of iron oxide particles, ferric oxide hydroxide particles and mixed particles thereof.

Method of incinerating combustible wastes and chlorine scavenger

Rubber or resin composition

The disclosure describes modified particles comprising inorganic particles as core particles, and at least one polysiloxane modified with at least one selected from the group consisting of polyethers, polyesters and aralkyls, which is coated on the surfaces of said core particles.

Modified particles

Non-magnetic undercoat layer for magnetic recording medium, magnetic

Disclosed herein are non-magnetic particles for a non-magnetic undercoat layer of a magnetic recording medium, comprising acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles coated with at least one selected from the group consisting of an A1 compound, a silane coupling agent, a titanate coupling agent, an aluminate coupling agent and a zirconate coupling agent; a non-magnetic undercoating layer containing such non-magnetic particles; and magnetic recording medium having such an undercoating layer.

Non-magnetic particles for non-magnetic undercoating layer of magnetic

Disclosed herein magnetic particles for magnetic recording which comprise acicular or plate-like magnetic particles and not less than 0.01 wt % (calculated as Al, SiO.sub.2 or Al and SiO.sub.2 and based on the acicular or plate-like magnetic particles) of an oxide or hydroxide containing Al, Si or both Al and Si and adhered to the surfaces of the acicular or plate-like magnetic particles, and which have not less than 0.50 of a molecular-weight-dependent parameter .alpha. represented by the following formula (I):

Magnetic particles for magnetic recording medium and process for

Disclosed herein are polydiphenyldiacetylenes having the following repeating unit (III): ##STR1## (wherein R.sup.1 denotes a hydrogen atom or a methoxy group; R.sup.2 denotes a hydrogen atom, a methoxy group or a methylamino group; R.sup.3 denotes a hydrogen atom or a trifluoromethyl group; and R.sup.4 denotes a hydrogen atom or a trifluoromethyl group; provided that R.sup.1 is not a hydrogen atom when R.sup.2 is hydrogen atom, and R.sup.3 is not a hydrogen atom when R.sup.4 is hydrogen atom).

Polydiphenyldiacetylenes

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Hiroshima, Japan

Minoru Ohsugi