Asahi Kasei Chemicals Corporation

Asahi Kasei Kabushiki Kaisha

Nichia Corporation

Kazunori Terada

Teruaki Sakuma

Shinji Ieda

Yu Nitto

Kazuya Noda

Masafumi Kuramoto

Toru Yamaguchi

Yoshifumi Araki

Takaaki Miyoshi

Kazuhiko Hashimoto

Masaaki Aramaki

Tomohiro Kondo

Yasukazu Shikano

Motohisa Kitani

Tomoyo Kawamura

Jun Mikami

Yoshikimi Kondo

Koichi Nagase

Takayuki Wakita

Kimiaki Kawatani

Hisho Yamada

Tomoyo Okumura

The present invention provides a polyamide composition containing 50 to 99 parts by mass of an aliphatic polyamide (1A) formed from a diamine and a dicarboxylic acid, and 1 to 50 parts by mass of a semi-aromatic polyamide (1B) containing a dicarboxylic acid unit that includes at least 75 mol % of isophthalic acid and a diamine unit that includes at least 50 mol % of a diamine of 4 to 10 carbon atoms, wherein the tan &#x3b4; peak temperature of the polyamide composition is at least 90&#xb0; C., and the weight average molecular weight Mw of the polyamide composition satisfies 15,000&#x2264;Mw&#x2264;35,000. The invention also provides a molded article or the like formed using the polyamide composition.

Polyamide composition and molded article

A polyamide resin composition including a polyamide resin (A), a copper compound (B), a bromide of an alkali metal and/or a bromide of an alkaline earth metal (C), and at least one fatty acid compound (D) selected from the group consisting of fatty acid esters, fatty acid amides, and fatty acid metal salts, wherein the fatty acid compound (D) has an acid value of 5 mgKOH/g or less.

Polyamide resin composition and molded article

A polyamide resin composition comprising a polyamide resin (A), a copper compound (B), a bromide of an alkali metal and/or a bromide of an alkaline earth metal (C), and at least one phosphorus compound (D) selected from the group consisting of tris(2,4-di-t-butylphenyl)phosphite, bis(2,4-di-t-butylphenyl)pentaerythritol diphosphite, bis(2,6-di-t-butyl-4-methylphenyl)pentaerythritol diphosphite, bis(2,4-dicumylphenyl)pentaerythritol diphosphite, 2,2',2&#x2033;-nitrilo(triethyl-tris(3,3&#x2032;,5,5&#x2032;-tetra-t-butyl-1,1&#x2032;-biphenyl-2,2&#x2032;-diyl))phosphite, tetrakis(2,4-di-t-butylphenyl)-4,4&#x2032;-biphenylene diphosphonite, tetrakis(2,4-di-t-butylphenyl)-4,3&#x2032;-biphenylene diphosphonite, and tetrakis(2,4-di-t-butylphenyl)-3,3&#x2032;-biphenylene diphosphonate, in an amount of 0.01 to 10% by mass with respect to 100% by mass of the polyamide resin composition, at least one fatty acid compound (E), and an inorganic filler (F).

The polyamide resin composition of the present invention contains (A) a polyamide resin, (B) a glass fiber including a compound having a carboxylic anhydride-containing unsaturated vinyl monomer, the compound being on at least a part of a surface of the glass fiber, and (C) a copolymer including a carboxylic anhydride-containing unsaturated vinyl monomer and having a glass transition temperature Tg of higher than 0&#xb0; C.

Polyamide resin composition and molded body

A polyamide resin composition including a polyamide resin (A), a copper compound (B), a bromide of an alkali metal and/or a bromide of an alkaline earth metal (C), and a secondary amine compound (D).

An object of the present invention is to provide a copolymer polyamide which has excellent strength, high-temperature strength, low water absorbance, low blocking properties, releasability and plasticizing time stability, and a copolymer polyamide composition which has excellent vibration fatigue characteristics, surface appearance and continuous productivity. A copolymer polyamide of the present invention is obtained by polymerizing (a) at least one alicyclic dicarboxylic acid, (b) one diamine having 8 or more carbon atoms, and (c) at least one copolymer component selected from the group consisting of the following (c-1) to (c-3): a (c-1) dicarboxylic acid other than the alicyclic dicarboxylic acid; a (c-2) diamine having fewer carbon atoms than the (b) diamine; and a (c-3) lactam and/or aminocarboxylic acid, and the copolymer polyamide satisfies specific conditions.

Copolymer polyamide

(Problems to be solved) Provision of a polyamide composition with good heat resistance, stability under heating, heat resistant color tone stability, reflow heat resistance properties and fogging properties. (Solution) A polyamide obtained by polymerizing (a) a dicarboxylic acid containing at least 50 mol % of an alicyclic dicarboxylic acid and (b) a diamine containing at least 50 mol % of a diamine having a pentamethylenediamine skeleton,

Polyamide and polyamide composition

[Problem to be Solved] To provide a polyamide having a high melting point, which has excellent strength, toughness, and stability under heating. [Solution] This polyamide is obtained by polymerizing an (a) dicarboxylic acid comprising at least 50 mol % of an alicyclic dicarboxylic acid and a (b) diamine comprising at least 50 mol % of a diamine having a pentamethylenediamine skeleton, wherein the polyamide has a cyclic amino end amount of 30 to 60&#x3bc; equivalents/g.

The present invention relates to a reflector for a light-emitting device consisting of (A) an polyamide composition comprising a polyamide polymerized from (a) a dicarboxylic acid comprising at least 50 mol % of an alicyclic dicarboxylic acid and (b) a diamine comprising at least 50 mol % of a diamine with a branched main chain.

Reflector for light-emitting device, and light-emitting device

A masterbatch pellet is provided for obtaining a polyamide resin composition excellent in mechanical strength and heat aging resistance. The masterbatch pellet is obtained by melt-kneading a raw material component containing a thermoplastic resin (A) and a metal oxide (B), wherein a content of the metal oxide (B) is 0.5% by mass or more and a fraction of the metal oxide (B) after the melt kneading is present as an aggregated particle of 5 &#x3bc;m or more in a major axis length. A proportion of the aggregated particle of 5 &#x3bc;m or more in a major axis length in a whole metal oxide after the melt kneading is preferably 30% by mass or less.

Masterbatch pellet, production method therefor and polyamide resin composition containing masterbatch pellet

A polyphenylene ether resin composition obtainable by melt-mixing a polyphenylene ether (A) comprising a structural unit (a) represented by formula (1): (wherein Rand Reach independently represent a hydrogen atom, a halogen atom, an optionally substituted alkyl group, and the like), and/or a structural unit (b) represented by formula (2): (wherein Rand Reach independently represent a hydrogen atom, a halogen atom, an optionally substituted alkyl group, and the like), with a nitrogen compound (B) comprising at least one group selected from the group consisting of primary amino groups, secondary amino groups and tertiary amino groups in a single molecule thereof, wherein the polyphenylene ether (A) comprises 0.1% by mass or more and 1.5% by mass or less of at least one type of aromatic hydrocarbon (C) containing 7 or 8 carbon atoms.

Polyphenylene ether resin composition having narrow molecular weight distribution

There are provided a thermoplastic resin composition excellent in a balance between fluidity and low outgassing, and a molded product and a sheet including the thermoplastic resin composition. The thermoplastic resin composition may include from 70 to 99% by mass of (A) a polyphenylene ether, from 1 to 30% by mass of (B) a copolymer including an aromatic vinyl compound and an unsaturated dicarboximide derivative as constituent monomers, and from 0 to 20% by mass of (C) a copolymer including an aromatic vinyl compound and a cyanided vinyl compound as constituent monomers, based on 100% by mass of the total of the (A) component, the (B) component and the (C) component, wherein the (B) component has a weight-average molecular weight of from 70,000 to 250,000.

Thermoplastic resin composition, and molded product and sheet comprising the composition

Disclosed is a conductive resin composition containing a polyamide, a polyphenylene ether, a polyester and a conductive carbon filler. The resin composition has attained excellent conductivity by being added with a small amount of the conductive carbon filler, while being excellent in fluidity and surface luster. Also disclosed is a molded body formed from such a resin composition.

Conductive resin composition

Disclosed is a conductive masterbatch comprising a polyamide and conductive carbon black, the conductive carbon black being present in the form of at least one agglomerated particle having a major axis of 20 to 100 &#x3bc;m, wherein the number of the agglomerated particle(s) is 1 to 100 as observed under an optical microscope with respect to a contiguous area of 3 mm.

Growing community of inventors

Tokyo, Japan

Kazunori Terada