| abstract |
A POLYAMIDE DERIVED FROM A DICARBOXYLIC ACID AND A DIAMINE, A LACTAM OR AMINOCARBOXYLIC ACID OR POLYAMIDE FORMING DERIVATIVE THEREOF AND CONTAINING AT LEAST 25 PARTS PER MILLION ( EXPRESSED AS PHOSPHORUS) OF A PHOSPHONAMIDE HAVING THE FORMULA: R3-N(-R4)-P(=O)(-R)-N(-R1)-R2 WHERE R IS ALIPHATIC, CYCLOALIPHATIC, AROMATIC OR-NR5R6; R1, R2, R3, R4, AND R5 ARE H, ALIPHATIC, CYCLOALIPHATIC, AROMFAIC OR FORM PART OF HETEROCYCLIC GROUP IN WHICH THE NITROGEN ALSO FORMS PART OF THE HETEROCYCLIC STRUCTURE, AND R6 IS ALIPHATIC, CYCLOALIPHATIC, AROMATIC OR FORMS PART OF A HETEROCYCLIC GROUP IN WHICH THE NITROGEN ALSO FORMS PART OF HETEROCYCLIC STRUCTURE. THE THUS MODIFIED POLYAMIDE GIVES FIBERS WHICH SHOW INCREASED DYE-UPTAKE TOGETHER WITH IMPROVED ELASTIC RECOVERY AND INITIAL MODULUS AFTER TREATMENT WITH BOILING WATER. |