Condensation product of 4,4'-dihydroxydiphenyl sulfone, 4,4'-dih

Details Condensation product of 4,4'-dihydroxydiphenyl sulfone, 4,4'-dih Condensation product of 4,4'-dihydroxydiphenyl sulfone, 4,4'-dih

1975-02-21

1980-08-19

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

210 24, C08G 818, C08G 820

Patent

active

042183669

ABSTRACT:
A fixing agent for improving the fastness properties of dyeings on polyamide fibers being a new condensation product of 4,4'-dihydroxydiphenylsulfone, 4,4'-dihydroxydiphenylsulfonesulfonic 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 temperature of 95.degree. to 120.degree. C., the fastness properties, especially wet-fastness properties of dyeings on polyamide fibers are remarkably improved.

REFERENCES:
patent: 2716098 (1955-08-01), Biedermann
patent: 3290111 (1966-12-01), Hees et al.
patent: 3687603 (1972-08-01), Abel et al.

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