Polyamides for rapid melt processability are manufd. by polymn. of mixts. of (1) dicarboxylic acids and diamines or their salts, (2) 0.05-0.5 mol% (based on diacids and diamines) compds. having ≥3 X1 functional groups, and (3) 0.5-2 mol% (based on diacids and diamines) compds. having 1 X2 functional group, such that when (2) has X1 functional groups based on carboxylic acids, then (3) has X2 functional group based on carboxylic acid or when (2) has X1 functional groups based on amines then (3) has X2 functional group based on amine. A typical polyamide was manufd. by polymn. of 11.111 kg salt based on equimolar adipic acid-hexamethylenediamine mixt. with 81 g 2,2,6,6-tetrakis(β-carboxyethyl)cyclohexanone in the presence of 80 g BzOH 2 h at 280° and 7.5 atm.
HIGH-FLUIDITY POLYAMIDE / C. Guaita, N. Peduto, G. Di Silvestro.
HIGH-FLUIDITY POLYAMIDE
G. Di SilvestroUltimo
2007
Abstract
Polyamides for rapid melt processability are manufd. by polymn. of mixts. of (1) dicarboxylic acids and diamines or their salts, (2) 0.05-0.5 mol% (based on diacids and diamines) compds. having ≥3 X1 functional groups, and (3) 0.5-2 mol% (based on diacids and diamines) compds. having 1 X2 functional group, such that when (2) has X1 functional groups based on carboxylic acids, then (3) has X2 functional group based on carboxylic acid or when (2) has X1 functional groups based on amines then (3) has X2 functional group based on amine. A typical polyamide was manufd. by polymn. of 11.111 kg salt based on equimolar adipic acid-hexamethylenediamine mixt. with 81 g 2,2,6,6-tetrakis(β-carboxyethyl)cyclohexanone in the presence of 80 g BzOH 2 h at 280° and 7.5 atm.
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