| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a polyamide resin having more excellent barrier properties than a blend composition of an aliphatic polyamide resin such as nylon 6 etc., for imparting flexibility. <P>SOLUTION: The polyamide resin is obtained by polycondensation of meta-xylylenediamine, a 4-12Cα,ω-straight-chain aliphatic dicarboxylic acid andε-caprolactam or 6-aminocaproic acid as a copolymerization component. The content of a constituent unit derived from the copolymerization component is 25-45 mol%, difference between terminal carboxy group concentration [COOH] and terminal amino group concentration [NH<SB>2</SB>] is 8-82μeq/g, (phosphorus atom concentration is obtained by adding concentration is obtained by adding) a phosphorus atom-containing compound is added to a polycondensation system so that a phosphorus atom concentration has 5-400 ppm, a temperature dropping semi-crystallization time of the polyamide resin at 160°C is≥200 second and≤1,800 seconds and the polyamide resin has one melt peak obtained by DSC measurement. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
