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US 6,307,007 B1Granted
Polycondensation products and their use as dyeing aids
AssigneeClariant Finance (BVI) Limited
InventorsJürg Heller, Alec Tindal
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Abstract
New water-soluble polycondensation products are obtained by reaction of polyfunctional amines with cyanamide, its derivatives or polymers in the presence of sulfamic acid. They are excellent fixing agents which improve fastness properties of dyeings with substantive dyestuffs on cellulose fiber materials, paper, board and non-wovens.
Claims13
Basic polycondensation products, and their water-soluble salts, obtained by neutralization with inorganic or organic acids usual in dyeing techniques, produced by the steps of:
- providing an amine (A) of formula (I)
- in which
- A is an alkylene chain which optionally can include a hetero atom, and
- R1-R4 are independently selected from hydrogen, alkyl optionally substituted by OH, CN or C1-4-alkoxy, provided that at least one of R1 to R4 is hydrogen;
- providing a cyanamide, its derivatives or polymers (B) in mol ratio of A:B=2:1 to 1:2,
- reacting said amine (A) with said cyanamide, its derivatives or polymers (B) in the presence of 0.1 to 0.7 mol sulfamic acid, or its salts, per mole of B, at temperatures of 80 to 180° C.
3 more elements
Dependencies are inferred from the claim text.