Copolymerized polyamide and a production process thereof

Details Copolymerized polyamide and a production process thereof Copolymerized polyamide and a production process thereof

C - Chemistry, Metallurgy

08

G

C08G 69/36 (2006.01) C08G 69/26 (2006.01)

Patent

CA 2156233

A copolymerized polyamide, comprising amide bands formed by an aliphatic diamine with 4 to 14 carbon atoms and terephthalic acid, with the existence ratios of distributed respectively adjacent amide bonds satisfying the following formulae (A) and (B), and with the half-crystallization time satisfying the following formula (C). 0.9 ~ [XY] obs./[XY] calcd. < 1.1 (A) 0.9 ~ [XX] obs./[XX] calcd. < 1.1 (B) wherein X stands for an amide bond formed by an aliphatic diamine with 4 to 14 carbon atoms and terephthalic acid, and Y stands for any other amide bond than X. [XY] refers to the rate at which X and Y are adjacent to each other among all the amide bonds in the polymer structure, and [XX] refers to the rate at which X and X are adjacent to each other among all the amide bonds in the polymer structure. [XY] calcd. and [XX] calcd. are respectively the values of [XY] and [XX] calculated on the assumption that X and Y amide bonds are distributed statistically at random, and [XY] obs. and [XX] obs. are respectively the values of [XY] and [XX] measured from said copolymerized polyamide. 4.4 - 0.1 (Tm - T) ~ log tl/2 < 5.5 - 0.1 (Tm - T) (C) t1/2 is the half-crystallization time (seconds). Tm is the melting point (°C) of the copolymerized polyamide. T is the measuring temperature (°C) of the half-crystallization time.

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