Kuraray Co., Ltd.

Other

Adeka Corporation

Hideharu Matsuoka

Hideaki Oka

Shigeru Sasaki

Kozo Tamura

Takaharu Shigematsu

Masahide Tsuzuki

Koji Beppu

Toru Kuki

Koichi Uchida

Ryu Kohase

Oka Hideaki

The present invention provides a reflector for an LED, including a polyamide composition and configure to keep high reflectance and high degree of whiteness even after being irradiated with LED light for a long period of time. The present invention is a reflector for an LED, including a polyamide composition containing polyamide (A) that has dicarboxylic acid units including 50 to 100 mol % of 1,4-cyclohexanedicarboxylic acid units and diamine units including 50 to 100 mol % of aliphatic diamine units having 4 to 18 carbon atoms.

Reflector for LED and light-emitting device equipped with same

Provided is a polyamide composition comprising 100 parts by weight of (A) a polyamide having dicarboxylic acid units containing 60 to 100 mol % of terephthalic acid units, and diamine units containing 60 to 100 mol % of 1,9-nonanediamine units and/or 2-methyl-1,8-octanediamine units, and 5 to 100 parts by weight of (B) a titanium oxide with an average particle size of 0.1 to 0.5 &#x3bc;m. The polyamide composition shows excellent heat resistance enough to withstand the SMT process, and gives a molded article with excellent whiteness and surface-reflectance.

Polyamide composition

Polyamide resin composition

The polyamide resin composition of the present invention comprises 100 parts by weight of a polyamide resin (A) having dicarboxylic acid units (a) comprising from 60 to 100 mol % of terephthalic acid repeat units and diamine units (b) comprising from 60 to 100 mol % of C aliphatic alkylenediamine repeat units, and from 1 to 100 parts by weight of a polybromostyrene (B), comprising from 0.5 to 100% by weight of a polybromostyrene having an epoxy group. Molded articles prepared from the polyamide resin composition of the present invention have good flame retardancy, good chemical resistance, good surface appearance and good blistering resistance.

Growing community of inventors

Ibaraki, Japan

Hideharu Matsuoka