Kaneka Corporation

Kazunori Saegusa

Akira Takaki

Tomomichi Hashimoto

Hidekazu Kawakubo

Nobuo Miyatake

Hiroshi Tsuneishi

Kazushi Nakatani

Hirokazu Iguchi

Hiroshi Tone

Kazuaki Matsumoto

Takao Manabe

Shusuke Yoshihara

Mamoru Kadokura

Mitsutaka Sato

Toshiaki Ezaki

Tetsuro Yamamoto

Takao Michinobu

Takao Shibata

Soichi Uchida

Tomoyuki Yoshimi

Keika Hattori

Satoshi Mizunuma

A masterbatch (C) containing thermally expandable microcapsules (A) and a carrier resin composition (B) is provided. The carrier resin composition (B) contains a carrier resin (B1) and a plasticizer (B2), the carrier resin (B1) being an acrylic resin having a weight average molecular weight of 8,000 or more and 350,000 or less, and the plasticizer (B2) being an acrylic plasticizer having a weight average molecular weight of 1,000 or more and 20,000 or less. The carrier resin composition (B) is substantially compatible with a polycarbonate resin and has a shear viscosity of 1.0 Pa·s or more and 1.5×10Pa·s or less at 80° C. The occurrence of whitening is suppressed and a good appearance can be obtained in an injection molded foam made with the masterbatch. A polycarbonate resin composition, an injection molded foam, and a method for producing an injection molded foam are provided.

Master batch, polycarbonate resin composition, injection foam molded body and method for producing same

A resin composition includes 5 to 82 parts by weight of an aromatic polyester, 0 to 50 parts by weight of an aromatic polycarbonate, 10 to 90 parts by weight of a highly heat-resistant aromatic polycarbonate, 0 to 10 parts by weight of a graft-copolymer, 0 to 10 parts by weight of an ethylene copolymer, 2.5 to 50 parts by weight of a silicate filler, 0 to 10 parts by weight of an electric conductive filler, and 0 to 2 parts by weight of a phosphorus compound wherein the total amount of the components are 100 parts by weight. The total amount of the graft-copolymer and the ethylene copolymer is from 0.5 to 10 parts by weight, the silicate filler is at least one compound selected from mica and kaolin, and the resin composition has a deflection temperature under load of 130&#xb0; C. or higher.

Thermoplastic resin composition and molded article thereof

Provided is a thermally conductive resin composition having a specific gravity of 1.4-2.0 and an In-Plane thermal conductivity of 1 W/(m&#xb7;K) or higher, and containing at least (A) 30-90% by mass of a thermoplastic resin, (B) 9-69% by mass of an inorganic filler having a thermal conductivity of 1 W/(m&#xb7;K) or higher, and (C) 0.05-10% by mass of a crystallization accelerator.

Thermally conductive resin composition

Provided is a polycarbonate resin composition containing 1-20 parts by weight of an amorphous thermoplastic resin having a glass transition temperature of not lower than 110&#xb0; C., and 1-50 parts by weight of plate-shaped fillers having a number average major axis length of 0.5-45 &#x3bc;m, with respect to 100 parts by weight of a matrix resin component containing 35-95 wt % of a polycarbonate resin and 5-65 wt % of a thermoplastic polyester resin.

Polycarbonate resin composition having excellent thermal decomposition resistance

A method of improving flowability of polycarbonate or polyarylate includes mixing the polycarbonate or the polyarylate with a flowability improver including a polyester. The polyester is a polycondensate of monomers including a bisphenol component (B) and a dicarboxylic acid component (C) at a molar ratio satisfying (B):(C)=45:55-55:45. The polyester includes a portion derived from the bisphenol component (B) and the dicarboxylic acid component (C) in an amount of 50 mol % or more.

Flowability improver for polycarbonate and polyarylate, polycarbonate resin composition, polyarylate resin composition, and molded article thereof

A halogen-free flame retardant polybutylene terephthalate resin composition contains 5 to 80 parts by weight of a phosphorus flame retardant (B) having a polyester structure in the main chain, 20 to 120 parts by weight of a nitrogen compound (C), 1 to 50 parts by weight of talc (D), and 0.1 to 2 parts by weight of an anti-dripping agent (E), based on 100 parts by weight of a polybutylene terephthalate resin (A) and exhibits a comparative tracking index of 400 V or higher in a tracking resistance test in accordance with IEC60112. The halogen-free flame retardant polybutylene terephthalate resin composition does not contain a halogen containing flame retardant, has high flame retardancy and high tracking resistance, and can be suitably used as members for electric/electronic parts.

Flame-retardant polybutylene terephthalate resin composition

A molded bodyincludes a rib partstanding on a back surfaceopposite to a design surfaceof a main bodyof the molded body. A reduced thickness partis formed on the back surfaceof the main body, the ratio D/T is 0.975 to 1.07 where D is the diameter of a circle that passes through base endsof both side facesof the rib partand is in contact with the design surfaceof the main bodypositioned between the base ends, and T is the thickness of the main bodyat an outer side of the reduced thickness part, and t&#x3c;1.3(T&#x2212;n) is satisfied where t is the thickness of the rib part, and n is the thickness of the reduced thickness part

Moulded body having specific cross-sectional structure

The present invention relates to a flame retardant which is a graft copolymer. The graft copolymer is obtained by polymerizing a vinyl monomer containing at least two polymerizable groups, and at least one other vinyl monomer, in the presence of polyorganosiloxane particles in a latex state. The polyorganosiloxane particles contain grafting agents that are unevenly distributed on the surface thereof. The present invention also relates to thermoplastic resins containing this flame retardant.

Polyorganiosiloxane-containing graft copolymer, resin compositions containing the same and process for produciton of polyorganosiloxane emulsions

A novel copolymer, graft copolymer, copolymer particles, flame retardant, and resin composition are provided. A copolymer including a polymer (A) segment having a glass transition temperature not more than &#x2212;10&#xb0; C., and a polymer (C) segment having at least a unit derived from a monomer (B) which has two or more of aromatic rings and one or more radical reactive groups in one molecule; a graft copolymer having the component (B) grafted onto the component (A); and copolymer particles thereof are obtained. A flame retardant resin composition is obtained by using the copolymer as a flame retardant and blending the flame retardant with the resin.

Copolymer, graft copolymer, graft copolymer particles, flame retardant, and resin composition

A rubber-modified styrene resin composition having excellent impact resistance, high tensile strength, and good moldability is provided. The present invention is accomplished by a rubber-modified styrene resin composition containing 99.9 to 97 percent by weight of a rubber-modified styrene resin (E) and 0.1 to 3 percent by weight of a polyorganosiloxane-containing graft copolymer (D), the polyorganosiloxane-containing graft copolymer (D) being a specific copolymer prepared with a polyorganosiloxane (A) produced by polymerizing 99.9 to 99.6 percent by weight of a organosiloxane with 0.1 to 0.4 percent by weight of a graft-linking agent.

Rubber-modified styrene resin composition

The present invention provides a polyorganosiloxane-containing graft copolymer A polyorganosiloxane-containing graft copolymer

Graft copolymers and impact-resistant flame-retardant resin compositions containing the same

The object of this invention is to provide a new process for producing polyorganosiloxane-containing resin which comprises reducing volatile siloxane, characterized in that polyorganosiloxane-containing resin in a slurry state is heat-stripped in producing polyorganosiloxane-containing resin.

Method for producing polyorganosiloxane-containing resin

The object of the present invention is to provide

Flame-retardant thermoplastic resin composition

A vinyl chloride resin composition having excellent weatherability and impact resistance which comprises (a) a vinyl chloride resin, (b) a graft copolymer which is obtained by graft-polymerizing (b2) a graft monomer component composed of 40 to 100% by weight of methyl methacrylate and 0 to 60% by weight of at least one monomer selected from the group consisting of an alkyl acrylate, an alkyl methacrylate, an unsaturated nitrile and an aromatic vinyl compound onto (b1) a crosslinked elastomeric polymer composed mainly of an alkyl acrylate, the methyl ethyl ketone-soluble portion of the graft copolymer having an &#x3b7;sp/c of 1 to 5 measured at 30&#xb0; C. with respect to its 0.2 g/100 cc acetone solution, and (c) calcium carbonate; and molded articles having a multilayer structure wherein a layer molded from the above composition is used as the surface layer or the inner layer.

Vinyl chloride resin composition and molded object comprising the same

A graft copolymer composition obtained by mixing a graft copolymer (A) containing a rubbery polymer having a glass transition temperature of not higher than 0&deg; C. as a trunk polymer and containing a alkyl ester of methacrylic acid-base polymer as a graft component, and having a mean particle size of at least 0.15 &mgr;m, and a graft copolymer (B) having a means particle size of from 0.03 to 0.13 &mgr;m; and a vinyl chloride-base resin composition containing the above described graft copolymer composition as an impact modifier, with excellent impact strength and suitable for use in the productions of pipes, window frames, joints, fences, doors, switch boxes. etc.

Growing community of inventors

Osaka, Japan

Kazunori Saegusa