Fixing agent for improving fastness properties of dyeings on...

Details Fixing agent for improving fastness properties of dyeings on... Fixing agent for improving fastness properties of dyeings on...

C - Chemistry, Metallurgy

08

G

402/41, 8/93.78

C08G 8/24 (2006.01) C07G 99/00 (2009.01) D06P 1/56 (2006.01) D06P 1/62 (2006.01) D06P 3/24 (2006.01)

Patent

CA 1052938

ABSTRACT OF THE DISCLOSURE A fixing agent for improving the fastness properties of dyeings on polyamide fibers being a new condensation product of 4,4'-dihydroxydiphenylsulfone, 4,4' - dihydroxydiphenysulfonesulfonic acid and a lower aliphatic aldehyde, which has a mean molecular weight of about 5,000 to about 30,000 and a ratio of carbon atom content and sulfur atom content of 3 0 : 1 to 4 8 1, or its metal salt, and when polyamide fibers are treated with the condensation product or its metal salt, or the condensation product in the presence of a salt of metal, at a temper- ature of 95° to 120°C., the fastness properties, especially wet-fastness properties of dyeings on polyamide fibers are remarkably improved.

220442

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