Sekisui Chemical Co., Ltd.

Sekisui Kagaku Kogyo Kabushiki Kaisha

Sekisui Chemical Kogyo Kabushiki Kaisha

Tatsuo Suzuki

Takashi Ueyama

Yoshiyuki Kosaka

Susumu Tanaka

Takayoshi Matsunaga

Tsunehiro Masaoka

Yoshiaki Tanaka

Masazumi Okudo

Manabu Matsubara

Yoshiaki Kodera

Kazuo Ukai

Kazuhiko Kanki

Toshio Enami

Yoshiyuki Takebe

Koji Watanabe

It is an object of the invention to provide a curable resin composition excellent in mechanical strength, heat resistance, moisture resistance, flexibility, resistance to thermal cycles, resistance to solder reflow, dimensional stability, and the like after curing and providing high adhesion reliability and conduction reliability and an adhesive epoxy resin paste, an adhesive epoxy resin sheet, a conductive connection paste, and a conductive connection sheet using the curable resin composition, and an electronic component joined body. The invention relates to a curable resin composition, which contains an epoxy resin, a solid polymer having a functional group to react with the epoxy group and a curing agent for an epoxy resin, no phase separation structure being observed in a matrix of a resin when a cured product is dyed with a heavy metal and observed with a transmission electron microscope.

Curing resin composition, adhesive epoxy resin paste, adhesive epoxy resin sheet, conductive connection paste, conductive connection sheet, and electronic component joined body

An electrical connection is formed by using a double laminated conductive fine particle provided with a conductive metal layer on the surface of a spherical elastic base particle by electroless plating and electroplating and a layer of a low-melting-point metal on the surface of the conductive metal layer and wherein the conductive metal layer comprises a plurality of metal layers.

CONDUCTIVE PARTICLES AND METHOD AND DEVICE FOR MANUFACTURING THE SAME, ANISOTROPIC CONDUCTIVE ADHESIVE AND CONDUCTIVE CONNECTION STRUCTURE, AND ELECTRONIC CIRCUIT COMPONENTS AND METHOD OF MANUFACTURING THE SAME

A method for making conductive particles that efficiently permit a plated layer of uniform thickness to be formed over each of the particles without aggregating the particles in a plating liquid. The apparatus comprises: a disk-shaped bottom plate secured to the top part of a vertical drive shaft; a porous body arranged on the upper surface of the outer periphery of the bottom plate and allowing only the plating liquid to pass therethrough; a contact ring arranged on the upper surface of the porous body to conduct electricity; a hollow cover including a truncated cone cover with an opening at its upper central portion and a hollow cylinder of the same diameter as that of the opening attached to the upper end of the truncated cone cover, the upper end portion of the hollow cylinder being folded back on the inner wall side thereof; a rotatable processing chamber formed so as to hold the porous body and the contact ring between the outer periphery of the hollow cover and the bottom plate; a supply pipe to supply the plating liquid from the opening into the processing chamber; a container to receive the plating liquid scattered from the pores of the porous body; a discharge pipe to discharge the plating liquid collected in the container; and an electrode inserted from the opening to contact the plating liquid.

Method and device for manufacturing conductive particles

A toner resin composition and toner is provided, wherein said toner resin composition comprises a high molecular weight resin having a peak molecular weight of about 100,000-4,000,000, or a gel content of about 20% or more is blended with another resin comprising at least a low molecular weight component (having a peak molecular weight of about 3,000-50,000, making up about 60-95 wt % of the resin weight) and a high molecular weight component (having a peak molecular weight of about 100,000-4,000,000, making up about 5-40 wt % of another resin weight).

Toner resin composition and a method of manufacturing it as well as a

A toner resin composition is provided containing as a main component a vinyl copolymer having a higher molecular weight component with a peak value of molecular weight distribution of 2.times.10.sup.5 -2.times.10.sup.6 and a lower molecular weight component with a peak value of molecular weight distribution of from 4.times.10.sup.3 -8.times.10.sup.4, and a thermoplastic polyester urethane of a weight average molecular weight of from about 5,000-500,000 in a ratio of 0.01 to 30 wt. % of the total resin composition.

Resin composition for toner

A toner whose main binder is a vinyl-type copolymer which has a styrene-type monomer and/or a (meth)acrylic ester monomer as constituent units wherein the vinyl-type copolymer has peaks of the molecular weight distribution at least in the range from 3.times.10.sup.3 to 4.times.10.sup.4 and in the range from 3.times.10.sup.5 to 8.times.10.sup.6, and the BET specific surface area of the main binder is 0.02-0.2 m.sup.2 /g.

Toner copolymer binder

Toner resin composition and a method of manufacturing it, as well as a

A toner resin composition is provided which is superior in anti-offset properties, anti-smearing properties and low temperature fixability, has superior image stability even when the copier is used for a long duration of time, and is not prone to aggregation. The toner resin composition mainly comprises a vinyl-type copolymer(s) which contains a low polymer component which is cross-linked using a cross-linking agent comprising diacrylate or dimethacrylate obtained from a diol which has a linear chain with a carbon number of 5 or more with no branches, or a branch(es) with a carbon number of 1 or less and has a peak molecular weight in the molecular weight distribution curve of from about 4.times.10.sup.3 to 8.times.10.sup.4 and a non-cross-linked high polymer component which has a peak molecular weight in the molecular weight distribution curve of from about 1.times.10.sup.5 to 4.times.10.sup.6, wherein said vinyl-type copolymer mainly comprises styrene-type monomers with (meth)acrylic ester monomers and/or other vinyl-type monomers as structural units.

Toner resin composition and toner

The present invention provides a toner resin composition and toner which is superior in terms of low temperature fixation and superior anti-offset, anti-aggregation and anti-smearing properties, by introducing in the binder which is primarily composed of vinyl copolymer, a vinyl copolymer which has, in its molecular weight distribution curve, at least a peak in the range of 1.times.10.sup.3 -8.times.10.sup.4, plus a peak or a shoulder in the range of 1.times.10.sup.5 -4.times.10.sup.6, or a Mw/Mn of 6 or more, or 5 wt % or more of a toluene nonsoluble component, and 1-50 wt % of a specific ethylene copolymer.

Toner with ethylene-vinyl acetate copolymer

To provide a toner resin composition and toner which has superior anti-offset properties, low temperature fixability and anti-blocking properties, and gives sufficiently stable high-quality images even when copying is done over a long duration of time. This toner resin composition is a toner resin composition comprising a low molecular weight vinyl polymer component and a high molecular weight vinyl polymer component which comprising styrene-type monomers and (meth)acrylic esters as structural units of said polymer components and having peaks of the molecular weight distribution in the region of molecular weights from about 4.times.10.sup.3 to about 8.times.10.sup.4 and in the region of molecular weights from about 1.times.10.sup.5 to about 4.times.10.sup.6, wherein said high molecular weight vinyl polymer component contains about 97 wt % or more of styrene-type monomers as structural units for said polymer component, and a styrene polymer with a weight average molecular weight of about 300,000 or higher, or a gel content of about 20 wt % or higher makes up 50 wt % or more of it. The target toner is obtained by using this toner resin composition.

Toner composition and toner with low and high M.W. vinyl polymers

A resin composition for toners with excellent characteristics is provided. The composition comprises, as principal components, a resin (A) containing carboxyl groups and a resin (B) containing glycidyl or .beta.-methylglycidyl groups, wherein the resin (A) is obtained by a reaction between a multivalent metal compound (m) and copolymer .alpha., said copolymer .alpha. being obtained from a styrene type monomer (a), a (meth)acrylic ester monomer (b), and a vinyl type monomer (c) containing carboxyl groups, and the resin (B) is copolymer .beta. obtained from a vinyl type monomer (d) containing glycidyl or .beta.-methylglycidyl groups and another vinyl type monomer (e).

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Shiga-ken, Japan

Tatsuo Suzuki