Method for dyeing polyester fibers in an alkaline dyeing bath in the presence of aminoacid and of polyamino-polycarboxylic acid.

摘要

A method for dyeing polyester fibers by using a disperse dye, wherein said dyeing is conducted under an alkaline condition in an aqueous medium in the presence of 1/ &cir& at least one amino acid member selected from the group consisting of an amino acid, an amino acid derivative having at least one hydrogen atom of its amino group replaced with an organic group, and a salt of such an amino acid or amino acid derivative, and 2/ &cir& at least one polycarboxylic acid or a salt thereof selected from the group consisting of ethylenediamine having at least two hydrogen atoms of its amino group replaced with a -RCOOH group (R means a C1-3 alkylene group) and a salt thereof; polyethylenepolyamine having at least two hydrogen atoms of its amino group or imino group replaced with a -RCOOH group (R means the same as defined above) and a salt thereof; and nitrilotriacetic acid, nitrilotripropionic acid, iminodiacetic acid, iminodipropionic acid, beta -hydroxyethyl-iminodiacetic acid, beta -hydroxyethyl-iminodipropionic acid and salts thereof.