| 摘要 |
PURPOSE:To prepare a resin compsn. which is excellent in the mechanical properties, heat resistance, and chemical resistance and shows a reduced change by water absorption in dimension and physical properties by compounding nylon 46, a specific aliph. polyamide, and a specific amorphous polyamide in a specified ratio. CONSTITUTION:Nylon 46 (A), an aliph. polyamide (B) having a ratio of methylene group to amide group (CH2/NHCO) in the polymer main chain of 6-11 (e.g. nylon 12, or nylon 612), and an amorphous polyamide having a glass transition point of 100 deg.C or higher (C) (e.g. 2,2,4-/2,4,4-trimethylhexamethylenediamine/ terephthalic acid polycondensate) are compounded in such a ratio that formulas I and II [wherein W(A), W(B), and W(C) are the wts. of components A, B, and C compounded, respectively] are satisfied. The resulting compsn. is excellent in the mechanical properties, resistance to heat and chemicals, and gloss of a molded article, and shows a remarkably reduced change by water absorption in dimension and physical properties while retaining properties characteristic of nylon 46. |
