Aqueous liquid compositions of reactive cyclodextrin derivatives and a finishing process using the said composition
An aqueous liquid composition comprising a reactive cyclodextrin derivative and at least one component selected from the group consisting of water-miscible organic solvent and ε-caprolactam is excellent in storage stability and useful in a finishing process for the treatment of suitable substrates, such as fibre materials.
1 . An aqueous liquid composition comprising a reactive cyclodextrin derivative or the hydrolyzate thereof and at least one component selected from the group consisting of water-miscible organic solvents and α-caprolactam.
2 . A composition according to claim 1 , wherein the water-miscible organic solvent is selected from the group consisting of isopropanol, propylene carbonate, polyethylene glycol, N-methyl-2-pyrrolidone, 1-methoxy propanol, diethylene glycol diethyl ether, glycerol and 1,2-propylene glycol.
3 . A composition according to claim 1 , wherein the water-miscible organic solvent is present in an amount of 2 to 60% by weight, based on the total weight of the composition.
4 . A composition according to claim 1 , wherein ε-caprolactam is present in an amount of 2 to 40% by weight, based on the total weight of the composition.
5 . A composition according to claim 1 , wherein the reactive cyclodextrin derivative or the hydrolyzate thereof is present in an amount of 2 to 70% by weight, based on the total weight of the composition.
6 . A composition according to claim 1 , wherein the reactive group of the cyclodextrin derivative is a nitrogen-containing heterocycle having at least one substituent selected from the group consisting of halogen and unsubstituted or substituted pyridinium.
7 . A composition according to claim 6 , wherein the reactive group of the cyclodextrin derivative is
a) a triazine group of formula
wherein
R 1 is fluorine, chlorine, unsubstituted or carboxy-substituted pyridinium or hydroxy, and
R 2 is as defined above for R 1 or is a radical of formula —OR 3 or —N(R 4 )R 5 , wherein
R 3 is hydrogen, alkali, C 1 -C 8 alkyl which is unsubstituted or substituted by hydroxy or C 1 , —C 4 alkoxy, and
R 4 and R 5 , independently from each other, are hydrogen; C 1 -C 8 alkyl which is unsubstituted or substituted by C 1 -C 4 alkoxy, hydroxy, sulfo, sulfato or carboxy; or phenyl which is unsubstituted or substituted by C 1 -C 4 alkyl, C 1 -C 4 alkoxy, halogen, nitro, carboxy or sulfo; or
b) a pyrimidinyl group of formula
wherein
one of radicals R 6 and R 7 is fluorine or chlorine and the other one of radicals R 6 and R 7 is fluorine, chlorine, or is a radical of formula —OR 3 or —N(R 4 )R 5 as defined above, and
R 8 is C 1 -C 4 alkylsulfonyl, C 1 -C 4 alkoxysulfonyl, C 1 -C 4 alkoxycarbonyl, C 2 -C 4 alkanoyl, chlorine, nitro, cyano, carboxyl or hydroxyl; or
c) a dichloroquinoxaline group of formula
8 . A composition according to claim 7 , wherein the reactive group of the cyclodextrin derivative is
a triazine group of formula (1), wherein
R 1 is chlorine, and
R 2 is a radical of formula —OR 3 , wherein R 3 is hydrogen, alkali or C 1 -C 8 alkyl.
9 . A composition according to claim 1 , wherein the reactive cyclodextrin derivative contains 1 to 4 reactive groups.
10 . A composition according to claim 1 , wherein the composition further comprises a buffer selected from the group consisting of borax, borates, phosphates, polyphosphates, oxalates, acetates or citrates.
11 . A finishing process comprising treating a substrate with the composition according to claim 1.