| 摘要 |
High temperature polyamide resin compositions for blow molding and articles blow molded from such compositions are provided. The blow molded articles exhibit excellent heat resistance, chemical resistance, and dimensional stability. The composition has a melting point of at least 275°C and a glass transition temperature of at least 60°C. The composition comprises an aromatic polyamide, an impact modifier, and a stabilizer. The aromatic polyamide is a polymer or copolymer having repeating units derived from a carboxylic acid component and an aliphatic diamine component, the carboxylic component being terephthalic acid or a mixture of terephthalic acid and one or more other carboxylic acids, and the aliphatic diamine component being hexamethylene diamine or a mixture of hexamethylene diamine and 2-methyl pentamethylene diamine or 2- ethyltetramethylene diamine. The impact modifier is selected from the group of (i) ethylene polymers and copolymers grafted with carboxylic acid, an anhydride thereof, maleimide or an epoxy compound; (ii) olefin/arcylic acid/anhydride terpolymers and ionomers; and (iii) styrenic thermoplastic elastomers grafted with an anhydride of a carboxylic acid. The stabilizer is selected from the group of (i) phosphite and phosphonite stabilizers; (ii) hindered phenol stabilizers; (iii) hindered amine stabilizers; and (iv) aromatic amine stabilizers.
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