| 摘要 |
This polyamide composition for an LED reflection plate comprises a polyamide (A), titanium oxide (B), magnesium oxide (C), a phenolic antioxidant (D), and a phosphorus-based antioxidant (E), wherein: said polyamide (A) is a polyamide having a melting point of 280°C or higher and including diamine units and dicarboxylic acid units including 50 mol% or more terephthalic acid units; said phenolic antioxidant (D) does not include four or more phenol structures in the molecule thereof; per 100 parts by mass of said polyamide (A), the content of said titanium oxide (B) is from 10 to 100 parts by mass, the content of said magnesium oxide (C) is from 0.50 to 15.0 parts by mass, the content of said phenolic antioxidant (D) is from 0.10 to 0.80 parts by mass, and the content of said phosphorus-based antioxidant (E) satisfies the following formula (I): 0.25 ≤ mass ratio of component (D) to component (E) ≤ 3.0. Also disclosed are a reflection plate obtained by molding said composition, and a light-emitting device including said reflection plate. |
