Production of basic dyeable polyester from terephthalic acid

Details Production of basic dyeable polyester from terephthalic acid Production of basic dyeable polyester from terephthalic acid

C - Chemistry, Metallurgy

08

G

402/189

C08G 63/68 (2006.01) C08G 75/24 (2006.01)

Patent

CA 1051591

ABSTRACT Fiber-forming cationic dyealble copolyesters are prepared continuously by reacting a low molecular weight glycol-dicarboxylic acid prepolymer having a carboxyl concentration of not more than 2000µeq/g and an intrinsic viscosity of not more than 0.10 with a glycol solution of a bis glycol ester of a difunctional aromatic compound possessing one or more metallo sulfonate groups and of such concentration that the resulting glycol/dicarboxylic acid moiety ratio is at least about 1. 6; and non- continuously by reacting a low molecular weight glycol-dicarboxylic acid prepolymer having a carboxyl concentration of not more than 2000µ eq/g and an intrinsic viscosity of not more than 0.07 with a glycol solution of bis glycol ester of a difunctional aromatic com- pound possessing one or more metallo sulfonate groups and of such concentration that the resulting glycol/dicarboxylic acid moiety ratio is at least about 1.6.

227817

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