Arylazopyrazolone dyes for polyester

Details Arylazopyrazolone dyes for polyester Arylazopyrazolone dyes for polyester

1976-06-04

1978-05-16

Higel, Floyd D.

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

260163, 06P 354, C09B 2938, D06P 104, D06P 118

Patent

active

040890783

ABSTRACT:
Bright greenish yellow dyes of excellent color value prepared by coupling a lower alkyl anthranilate into 1-phenyl-3-carbalkoxy-5-pyrazolone and having the formula: ##STR1## WHERE R and R.sub.1 are independently lower alkyl; X is hydrogen, halogen, nitro, hydroxy, lower alkyl or lower alkoxy; Y is hydrogen, halogen, lower alkyl or nitro and a and b are integers of 1-2. This class of azo dyes, when appropriately dispersed, produces dyeings on aromatic polyester fabrics with excellent substantivity, outstanding sublimation fastness and good fastness to light. The dyes are applied to polyester, such as polyethyleneterephthalate, by carrier dyeing, pressure dyeing and thermofixation methods.

REFERENCES:
patent: 2019914 (1935-11-01), Kracker
patent: 2228303 (1941-01-01), Fischer
patent: 3019217 (1962-01-01), Joyce
patent: 3096321 (1963-07-01), Ribka
patent: 3152114 (1964-10-01), Siegel et al.
patent: 3198783 (1965-08-01), Lewis
patent: 3212841 (1965-10-01), Stanley
patent: 3325469 (1967-06-01), Berrie et al.

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