Asahi Kasei Chemicals Corporation

Asahi Kasei Kabushiki Kaisha

Akira Miyamoto

Kazuhiro Shibuya

Hiroshi Hachiya

Toshiharu Sakuma

Kazuharu Yasuda

Wen-Yi Su

Nobutsugu Nanba

Keiko Motoyama

Chung Neng Wu

Provided is a carbon black master batch pellet for black coloring comprising a high concentration of carbon black, having an excellent dispersibility of the carbon black, and which can express a stable black coloring concentration with hardly any classification occurring even when mixed in the various raw materials of a thermoplastic resin composition. A pellet comprising 35 to 55 mass % of carbon black (A), 65 to 45 mass % of a thermoplastic resin (B), and 0 to 10 mass % of a dispersant assistant (C), wherein a diameter (D) in a direction orthogonal to the axial direction is 2 to 5 mm, and a ratio (D/L) of the diameter (D) to a length (L (mm)) in the axial direction is 3.0 to 1.5.

Pellet and thermoplastic resin composition

A polycarbonate thin molded article containing a resin composition, the resin composition containing: 100 parts by weight of a resin (A), the resin (A) being an aromatic polycarbonate or a resin mainly containing an aromatic polycarbonate; 0.1 to 200 parts by weight of an inorganic compound (B); 0.001 to 10 parts by weight of at least one compound (C) selected from an organic acidic compound and an organic acidic compound derivative; and 0.001 to 1 part by weight of at least one metal salt (D) selected from an organic acid alkali metal salt and an organic acid alkaline earth metal salt, a part corresponding to at least 50% of the surface area of the polycarbonate thin molded article having a thickness of less than 0.7 mm, and a shrinkage ratio S1(%) in a molding flow direction of the polycarbonate thin molded article upon its being left under an atmosphere of 170&#xb0; C. for 30 minutes satisfying the following formula (1):&#x2212;60&#x3c;1&#x3c;&#x2212;1&#x2003;&#x2003;formula (1).

Aromatic polycarbonate molded article and resin composition

According to the present invention, an aromatic polycarbonate resin composition comprising: a resin component (A) mainly comprising an aromatic polycarbonate; a reinforcing agent and/or a filler (B); and an aromatic sulfonic acid and/or an ester thereof (C), wherein a mixture consisting of said component (B) and said component (C) has a pH of 4 to 8 when measured in accordance with JIS-K5101, and said composition comprises 1 to 200 parts by weight of said component (B) and 0.001 to 5 parts by weight of said component (C) based on 100 parts by weight of said component (A) is provided.

Aromatic polycarbonate resin composition and production method thereof

A flame retardant aromatic polycarbonate resin composition comprising 100 parts by weight of an aromatic polycarbonate (A), 0.01 to 0.5 part by weight of branched metal oxide particles (branched metal oxide aggregates and/or branched metal oxide agglomerates) (B), 0.0001 to 0.2 part by weight of an alkali metal salt (C) of an organic sulfonic acid, and 0.01 to 0.5 part by weight of a fluoropolymer (D), the branched metal oxide particles (B) being dispersed in a mixture of components (A), (C) and (D), wherein at least 70% of the branched metal oxide particles (B) have a diameter within the range of from 10 to 200 nm.

Flame-retardant aromatic polycarbonate resin composition

An aromatic polycarbonate resin composition having: 100 parts by weight of a resin component (A) mainly having an aromatic polycarbonate, 0.1 to 200 parts by weight of a solid inorganic compound (B), at least one compound (C) selected from the group consisting of an organic acid, an organic acid ester, and an organic acid anhydride, 0.001 to 1 part by weight of at least one organic acid metal salt (D) selected from the group consisting of an organic acid alkali metal salt and an organic acid alkaline earth metal salt, and 0.01 to 1 part by weight of a fluoropolymer (E), wherein compound (C) is present in an amount wherein a mixture of compounds (B) and (C) exhibits a pH value of from 4 to 8.

Flame retardant aromatic polycarbonate resin composition

A molded article produced by injection-molding a molten form of a flame-retardant aromatic polycarbonate resin composition comprising: 100 parts by weight of an aromatic polycarbonate (A) (Mw: 17,000 to 35,000), 0.01 to 3 parts by weight of inorganic compound particles (B) (average diameter: 10 nm to 10 &#x3bc;m), 0.001 to 0.5 part by weight of an alkali metal salt (C) of an organic sulfonic acid, and 0.01 to 0.5 part by weight of a fluoropolymer (D), wherein the largest FL/t ratio of the molded article is 50 or more, wherein FL is a flow length of the composition in a mold and t is a thickness of the molded article, the FL/t ratios being obtained by measuring the thicknesses of the molded article at portions corresponding to flow paths (L) (from a gate to points at which the flow of the composition stops) of the composition in the mold during the molding, and calculating an integral of (dL/T') along each (L) (dL: length of a segment of (L), t&#x2032;: thickness of the molded article at a portion corresponding to the segment), wherein the calculated integrals are defined as the FL/t ratios.

Moldings of flame-retardant aromatic polycarbonate resin compositions

Disclosed is a method for producing a flame retardant polycarbonate resin composition by using a screw extruder, which comprises extruding a resin component (mainly comprising a polycarbonate) and an organic phosphorus compound having an acid value of not more than 0.1 mg KOH/g while kneading, wherein the temperature of the resin component in the extruder is not higher than 300&deg; C., and the residence time of the resin component in the extruder is not more than 40 seconds.

Method for producing a flame retardant polycarbonate resin composition

Disclosed is a flame retardant polycarbonate resin composition, which comprises 50 to 98 parts by weight of an aromatic polycarbonate (A), 0.1 to 49 parts by weight of a copolymer (B) comprising an aromatic vinyl monomer unit (b-1) and a vinyl cyanide monomer unit (b-2), 0.5 to 30 parts by weight of a cyanide-containing, graft copolymer (C) obtained by copolymerizing an aromatic vinyl compound (c-1) and a vinyl cyanide compound (c-2) in the presence of a rubbery polymer (c-3), 0.5 to 30 parts by weight of a (meth)acrylate-containing, graft copolymer (D) obtained by copolymerizing an aromatic vinyl compound (d-1) and an alkyl (meth)acrylate (d-2) in the presence of a rubbery butadiene polymer (d-3), and 0.1 to 30 parts by weight of at least one organic phosphorus compound oligomer (E), wherein the total amount of the components (A), (B), (C) and (D) is 100 parts by weight.

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Yokohama, Japan

Akira Miyamoto